@charset "UTF-8";:root{--neutral-0:#ffffff;--neutral-50:#fdfcfd;--neutral-100:#faf9fb;--neutral-200:#f2eff3;--neutral-300:#eae7ec;--neutral-400:#bcbac7;--neutral-500:#8e8c99;--neutral-600:#65636d;--neutral-700:#3c393f;--neutral-750:#2b292d;--neutral-800:#232225;--neutral-850:#1a191b;--neutral-900:#121113;--neutral-950:#0a090b;--accent-100:#edf2fe;--accent-200:#c1d0ff;--accent-300:#8da4ef;--accent-400:#5472e4;--accent-500:#3e63dd;--accent-600:#3358d4;--accent-700:#1f2d5c;--green-300:#b4dfc4;--green-500:#46a758;--green-700:#2a7e3b;--red-300:#f8bfc8;--red-500:#e54666;--red-700:#ca244d;--amber-200:#ffe7a2;--amber-400:#ffba18;--amber-500:#f59e0b;--amber-600:#ab6400;--logo-violet:#8b5cf6;--hd-cyan:#22d3ee;--hd-purple:#a78bfa;--hd-orange:var(--amber-400);--hd-green:var(--green-500);--hd-red:var(--red-500);--hd-blue:#3b82f6;--hd-cyan-soft:#06b6d4;--hd-purple-soft:var(--logo-violet);--hd-ico-cyan-fill:#ecfeff;--hd-ico-purple-fill:#f5f3ff;--hd-ico-orange-fill:#fffbeb;--hd-ico-green-fill:#f0fdf4;--hd-ico-red-fill:#fef2f2;--hd-ico-blue-fill:#eff6ff;--hd-ico-cyan-stroke:#67e8f9;--hd-ico-purple-stroke:#c4b5fd;--hd-ico-orange-stroke:#fcd34d;--hd-ico-green-stroke:var(--green-300);--hd-ico-red-stroke:var(--red-300);--hd-ico-blue-stroke:#93c5fd;--hero-bg-light-top:#f5f3ff;--hero-bg-light-mid:#eef1ff;--hero-bg-light-bot:#f7f8fc;--font-sans:'Inter Variable','Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;--font-serif:'Fraunces Variable','Source Serif 4',Georgia,serif;--font-mono:'JetBrains Mono Variable','JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;--text-xs:0.75rem;--text-sm:0.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:1.875rem;--text-4xl:2.25rem;--text-5xl:3rem;--text-6xl:3.75rem;--text-7xl:4.5rem;--leading-tight:1.15;--leading-snug:1.3;--leading-normal:1.55;--leading-relaxed:1.7;--leading-loose:1.85;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4rem;--space-9:6rem;--space-10:8rem;--radius-sm:0.25rem;--radius:0.5rem;--radius-md:0.75rem;--radius-lg:1rem;--radius-xl:1.5rem;--radius-pill:999px;--ease-out-expo:cubic-bezier(0.19,1,0.22,1);--ease-out-back:cubic-bezier(0.34,1.56,0.64,1);--ease-in-out:cubic-bezier(0.65,0,0.35,1);--duration-fast:150ms;--duration-normal:250ms;--duration-slow:400ms;--content-width:52rem;--content-width-wide:64rem;--content-width-narrow:44rem;--page-width:100rem;--scroll-offset:5rem;--z-sidebar:40;--z-sticky-bar:45;--z-header:50;--z-fab:60;--z-overlay:80;--z-modal:90;--z-tooltip:100}:root{--bg:var(--neutral-950);--bg-surface:var(--neutral-900);--bg-surface-2:var(--neutral-850);--bg-elevated:var(--neutral-800);--bg-accent:color-mix(in srgb,var(--accent-500) 10%,transparent);--bg-glass:color-mix(in srgb,var(--neutral-900) 85%,transparent);--text:#eeeef0;--text-emphasis:#ffffff;--text-secondary:#b5b2bc;--text-muted:var(--neutral-400);--text-accent:#9eb1ff;--border:rgba(255,255,255,0.08);--border-strong:rgba(255,255,255,0.14);--border-accent:var(--accent-500);--color-bg:var(--bg);--color-surface-1:var(--bg-surface);--color-surface-2:var(--bg-surface-2);--color-surface-3:var(--bg-elevated);--color-text:var(--text);--color-text-emphasis:var(--text-emphasis);--color-text-muted:var(--text-muted);--color-text-secondary:var(--text-secondary);--color-accent:var(--accent-500);--color-accent-soft:var(--accent-400);--color-border:var(--border);--color-border-subtle:var(--border);--color-border-strong:var(--border-strong);--color-difficulty-easy-fg:var(--green-500);--color-difficulty-easy-bg:color-mix(in srgb,var(--green-500) 14%,transparent);--color-difficulty-medium-fg:var(--amber-600);--color-difficulty-medium-bg:color-mix(in srgb,var(--amber-400) 16%,transparent);--color-difficulty-hard-fg:var(--red-500);--color-difficulty-hard-bg:color-mix(in srgb,var(--red-500) 14%,transparent);--shadow-sm:0 1px 2px rgba(0,0,0,0.4);--shadow:0 4px 12px rgba(0,0,0,0.35),0 1px 2px rgba(0,0,0,0.25);--shadow-lg:0 16px 40px rgba(0,0,0,0.45),0 4px 8px rgba(0,0,0,0.3);--shadow-xl:0 28px 64px -12px rgba(0,0,0,0.55),0 8px 16px -4px rgba(0,0,0,0.35);--shadow-accent:0 0 0 1px var(--accent-500),0 8px 32px color-mix(in srgb,var(--accent-500) 25%,transparent);--shadow-accent-lg:0 0 0 1px color-mix(in srgb,var(--accent-500) 55%,transparent),0 18px 48px -12px color-mix(in srgb,var(--accent-500) 45%,transparent),0 6px 16px -4px color-mix(in srgb,var(--accent-600) 25%,transparent);--hl-accent-edge:linear-gradient(90deg,transparent 0%,var(--accent-400) 35%,var(--accent-500) 65%,transparent 100%);--hl-card-top:linear-gradient(180deg,rgba(255,255,255,0.06),transparent 40%);--hl-cta-bg:radial-gradient(ellipse at top,color-mix(in srgb,var(--accent-500) 22%,transparent),transparent 70%),linear-gradient(180deg,color-mix(in srgb,var(--accent-600) 14%,var(--bg-surface)) 0%,var(--bg-surface) 100%);--hl-section-rule:linear-gradient(90deg,color-mix(in srgb,var(--accent-500) 85%,transparent) 0%,color-mix(in srgb,var(--accent-300) 95%,transparent) 14%,color-mix(in srgb,var(--accent-500) 70%,transparent) 32%,color-mix(in srgb,var(--accent-500) 35%,transparent) 62%,transparent 100%);--hl-section-rule-glow:radial-gradient(ellipse 180px 10px at 12% 50%,color-mix(in srgb,var(--accent-500) 55%,transparent) 0%,transparent 70%);--hl-section-rule-short:linear-gradient(90deg,color-mix(in srgb,var(--accent-500) 70%,transparent) 0%,color-mix(in srgb,var(--accent-300) 80%,transparent) 18%,color-mix(in srgb,var(--accent-500) 40%,transparent) 55%,transparent 100%);--callout-note-bg:color-mix(in srgb,var(--accent-500) 10%,transparent);--callout-note-border:var(--accent-400);--callout-tip-bg:color-mix(in srgb,var(--green-500) 10%,transparent);--callout-tip-border:var(--green-500);--callout-important-bg:color-mix(in srgb,var(--accent-600) 18%,transparent);--callout-important-border:var(--accent-400);--callout-warning-bg:color-mix(in srgb,var(--amber-400) 12%,transparent);--callout-warning-border:var(--amber-400);--callout-caution-bg:color-mix(in srgb,var(--red-500) 12%,transparent);--callout-caution-border:var(--red-500);--mm-bg:var(--bg-surface);--mm-fg:var(--text-emphasis);--mm-line:rgba(255,255,255,0.55);--mm-accent:var(--accent-400);--mm-muted:var(--text-secondary);--mm-surface:var(--bg-surface-2);--mm-border:rgba(255,255,255,0.22)}[data-theme="light"]{--bg:var(--neutral-50);--bg-surface:#ffffff;--bg-surface-2:var(--neutral-200);--bg-elevated:#ffffff;--bg-accent:color-mix(in srgb,var(--accent-500) 8%,transparent);--bg-glass:color-mix(in srgb,#ffffff 85%,transparent);--text:var(--neutral-850);--text-emphasis:#000000;--text-secondary:var(--neutral-700);--text-muted:var(--neutral-600);--text-accent:var(--accent-700);--border:rgba(26,25,27,0.09);--border-strong:rgba(26,25,27,0.16);--border-accent:var(--accent-500);--color-bg:var(--bg);--color-surface-1:var(--bg-surface);--color-surface-2:var(--bg-surface-2);--color-surface-3:var(--bg-elevated);--color-text:var(--text);--color-text-emphasis:var(--text-emphasis);--color-text-muted:var(--text-muted);--color-text-secondary:var(--text-secondary);--color-accent:var(--accent-500);--color-accent-soft:var(--accent-600);--color-border:var(--border);--color-border-subtle:var(--border);--color-border-strong:var(--border-strong);--color-difficulty-easy-fg:var(--green-700);--color-difficulty-easy-bg:color-mix(in srgb,var(--green-500) 18%,transparent);--color-difficulty-medium-fg:var(--amber-600);--color-difficulty-medium-bg:color-mix(in srgb,var(--amber-400) 24%,transparent);--color-difficulty-hard-fg:var(--red-700);--color-difficulty-hard-bg:color-mix(in srgb,var(--red-500) 18%,transparent);--shadow-sm:0 1px 2px rgba(26,25,27,0.05);--shadow:0 4px 12px rgba(26,25,27,0.07),0 1px 2px rgba(26,25,27,0.04);--shadow-lg:0 16px 40px rgba(26,25,27,0.1),0 4px 8px rgba(26,25,27,0.04);--shadow-xl:0 28px 64px -12px rgba(26,25,27,0.14),0 8px 16px -4px rgba(26,25,27,0.06);--shadow-accent:0 0 0 1px var(--accent-500),0 8px 32px color-mix(in srgb,var(--accent-500) 20%,transparent);--shadow-accent-lg:0 0 0 1px color-mix(in srgb,var(--accent-500) 50%,transparent),0 20px 48px -12px color-mix(in srgb,var(--accent-500) 35%,transparent),0 6px 16px -4px rgba(17,19,27,0.08);--hl-accent-edge:linear-gradient(90deg,transparent 0%,var(--accent-400) 35%,var(--accent-600) 65%,transparent 100%);--hl-card-top:linear-gradient(180deg,rgba(255,255,255,0.8),transparent 40%);--hl-cta-bg:radial-gradient(ellipse at top,color-mix(in srgb,var(--accent-500) 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12%,white);--callout-warning-bg:color-mix(in srgb,var(--amber-400) 18%,white);--callout-caution-bg:color-mix(in srgb,var(--red-500) 10%,white);--hd-cyan:#0891b2;--hd-purple:#7c3aed;--hd-orange:var(--amber-600);--hd-green:var(--green-700);--hd-red:var(--red-700);--hd-blue:#2563eb;--mm-bg:var(--bg-surface);--mm-fg:var(--text-emphasis);--mm-line:rgba(26,25,27,0.55);--mm-accent:var(--accent-600);--mm-muted:var(--text-secondary);--mm-surface:var(--neutral-100);--mm-border:rgba(26,25,27,0.28)}@font-face{font-family:'Inter Variable';font-style:normal;font-display:swap;font-weight:100 900;src:url('/static/fonts/inter-normal.woff2?v=8e433c05') format('woff2-variations')}@font-face{font-family:'Inter Variable';font-style:italic;font-display:swap;font-weight:100 900;src:url('/static/fonts/inter-italic.woff2?v=14a99c00') format('woff2-variations')}@font-face{font-family:'JetBrains Mono Variable';font-style:normal;font-display:swap;font-weight:100 800;src:url('/static/fonts/jetbrains-mono-normal.woff2?v=b058178d') format('woff2-variations')}@font-face{font-family:'Fraunces Variable';font-style:normal;font-display:swap;font-weight:100 900;src:url('/static/fonts/fraunces-normal.woff2?v=eb248676') format('woff2-variations')}*,*::before,*::after{box-sizing:border-box}*{margin:0}html{height:100%}html{font-family:var(--font-sans);font-size:16px;line-height:var(--leading-normal);-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;font-feature-settings:'cv11','ss01','ss03';scroll-behavior:smooth;scroll-padding-top:var(--scroll-offset);overflow-x:clip}[id]{scroll-margin-top:var(--scroll-offset)}body{background:var(--bg);color:var(--text);min-height:100dvh;line-height:var(--leading-relaxed)}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit;color:inherit}p,h1,h2,h3,h4,h5,h6{overflow-wrap:break-word}button{cursor:pointer;background:none;border:none;padding:0}a{color:inherit;text-decoration:none}:focus-visible{outline:2px solid var(--accent-400);outline-offset:3px;border-radius:var(--radius-sm)}::selection{background:color-mix(in srgb,var(--accent-500) 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var(--ease-in-out)}a:hover{color:var(--text-accent)}code{font-family:var(--font-mono);font-size:0.92em;font-feature-settings:'zero','ss01'}strong{font-weight:650;color:var(--text-emphasis)}em{font-style:italic}.page{min-height:100dvh;display:flex;flex-direction:column}.container{width:100%;max-width:var(--page-width);margin:0 auto;padding-inline:clamp(var(--space-4),3vw,var(--space-7))}.container--narrow{max-width:var(--content-width)}.container--wide{max-width:var(--content-width-wide)}.container--full{max-width:none}.skip-link{position:absolute;top:var(--space-2);left:var(--space-2);background:var(--accent-500);color:white;padding:var(--space-2) var(--space-4);border-radius:var(--radius);z-index:var(--z-tooltip);transform:translateY(-200%);transition:transform var(--duration-fast) var(--ease-out-expo)}.skip-link:focus-visible{transform:translateY(0)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 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var(--ease-in-out);white-space:nowrap;cursor:pointer;line-height:1;border:1px solid transparent;min-height:44px;touch-action:manipulation;-webkit-tap-highlight-color:transparent;user-select:none}.btn:focus-visible{outline:none;box-shadow:0 0 0 2px var(--bg),0 0 0 4px var(--accent-500)}.btn svg{flex-shrink:0;transition:transform var(--duration-normal) var(--ease-in-out)}.btn:hover svg:last-child,.btn:focus-visible svg:last-child{transform:translateX(2px)}.btn--primary{background:linear-gradient(135deg,var(--accent-400),var(--accent-600));color:white;box-shadow:0 0 0 1px rgba(255,255,255,0.08) inset,0 1px 0 rgba(255,255,255,0.14) inset,0 6px 16px -4px color-mix(in srgb,var(--accent-500) 55%,transparent),0 2px 4px rgba(0,0,0,0.18)}.btn--primary:hover{transform:translateY(-1px);color:white;box-shadow:0 0 0 1px rgba(255,255,255,0.10) inset,0 1px 0 rgba(255,255,255,0.18) inset,0 12px 28px -6px color-mix(in srgb,var(--accent-500) 65%,transparent),0 4px 8px 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8px;margin-left:2px;border-radius:999px;background:var(--bg-surface-2);color:var(--text-secondary);font-size:0.85em;font-weight:600;font-variant-numeric:tabular-nums;line-height:1.4;border:1px solid var(--border)}.btn__count-icon{flex-shrink:0;color:#f5b400}.btn:hover .btn__count{color:var(--text-emphasis);border-color:var(--border-strong)}.btn:hover .btn__count-icon,.btn:focus-visible .btn__count-icon{transform:none}.btn[disabled],.btn[aria-disabled="true"]{opacity:0.55;cursor:not-allowed;transform:none !important;box-shadow:none}@media (prefers-reduced-motion: reduce){.btn,.btn svg{transition-duration:0ms}.btn:hover,.btn:active{transform:none}.btn:hover svg:last-child,.btn:focus-visible svg:last-child{transform:none}}.badge{display:inline-flex;align-items:center;gap:var(--space-1);padding:2px 10px;border-radius:var(--radius-pill);font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:0.04em;text-transform:uppercase;background:var(--bg-surface);border:1px solid var(--border);color:var(--text-secondary);line-height:1.6}.badge--beginner{color:var(--green-300);background:color-mix(in srgb,var(--green-500) 12%,transparent);border-color:color-mix(in srgb,var(--green-500) 30%,transparent)}.badge--intermediate{color:var(--amber-400);background:color-mix(in srgb,var(--amber-400) 12%,transparent);border-color:color-mix(in srgb,var(--amber-400) 30%,transparent)}.badge--advanced{color:var(--red-300);background:color-mix(in srgb,var(--red-500) 12%,transparent);border-color:color-mix(in srgb,var(--red-500) 30%,transparent)}[data-theme="light"] .badge--beginner{color:var(--green-700);background:color-mix(in srgb,var(--green-500) 15%,white);border-color:var(--green-300)}[data-theme="light"] .badge--intermediate{color:var(--amber-600);background:color-mix(in srgb,var(--amber-400) 22%,white);border-color:var(--amber-400)}[data-theme="light"] .badge--advanced{color:var(--red-700);background:color-mix(in srgb,var(--red-500) 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.prose>.algostep{margin-block:var(--space-7)}[data-book="dsa"] .prose>pre+.code-tabs{margin-top:calc(var(--space-3) * -1)}[data-book="dsa"] .prose>.algostep{background:transparent}[data-book="umbrella"] body{display:flex;flex-direction:column;min-height:100dvh;overflow-x:clip}[data-book="umbrella"] html{overflow-x:clip}[data-book="umbrella"] .u-page{position:relative;width:100%;flex:1 0 auto;display:flex;flex-direction:column}[data-book="umbrella"] .u-ambient{position:absolute;top:-160px;left:50%;transform:translateX(-50%);width:min(1400px,95vw);height:720px;pointer-events:none;z-index:0;background:radial-gradient(ellipse 55% 45% at 50% 35%,color-mix(in srgb,var(--accent-500) 18%,transparent) 0%,color-mix(in srgb,var(--accent-500) 6%,transparent) 40%,transparent 75%);filter:blur(48px);opacity:0.9}[data-book="umbrella"] .u-topbar{position:relative;z-index:10;width:100%;padding:var(--space-5) clamp(var(--space-4),3vw,var(--space-5)) 0}[data-book="umbrella"] .u-topbar__inner{display:flex;justify-content:space-between;align-items:center;width:100%;max-width:1200px;margin:0 auto}[data-book="umbrella"] .u-mark{display:inline-flex;align-items:center;gap:0.65rem;text-decoration:none;color:var(--color-text-emphasis);font-weight:700;letter-spacing:-0.01em;transition:opacity var(--duration-fast) var(--ease-out-expo)}[data-book="umbrella"] .u-mark:hover{opacity:0.78}[data-book="umbrella"] .u-mark__glyph img{display:block;width:32px;height:32px}[data-book="umbrella"] .u-mark__wordmark{font-family:var(--font-sans);font-size:1.0625rem;text-transform:lowercase;font-feature-settings:'ss01' 1,'cv11' 1}[data-book="umbrella"] .u-mark__dot{color:var(--color-accent);font-weight:700}[data-book="umbrella"] .u-topbar__meta{display:flex;align-items:center;gap:var(--space-3)}[data-book="umbrella"] .u-icon-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;padding:0;border:1px solid var(--color-border-subtle);border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-surface-1) 70%,transparent);color:var(--color-text-secondary);text-decoration:none;cursor:pointer;transition:color var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo),background var(--duration-fast) var(--ease-out-expo)}[data-book="umbrella"] .u-icon-btn:hover{color:var(--color-text-emphasis);border-color:var(--color-border-strong);background:var(--color-surface-2)}[data-book="umbrella"] .u-icon-btn:focus-visible{outline:none;border-color:var(--color-accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--color-accent) 30%,transparent)}[data-book="umbrella"] .u-icon-btn__icon{display:block}[data-book="umbrella"] .u-stars{display:inline-flex;align-items:center;gap:0.5rem;height:34px;padding:0 0.7rem;border:1px solid var(--color-border-subtle);border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-surface-1) 70%,transparent);color:var(--color-text-secondary);font-family:var(--font-sans);font-size:0.8125rem;font-weight:600;letter-spacing:-0.005em;text-decoration:none;white-space:nowrap;transition:color var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo),background var(--duration-fast) var(--ease-out-expo)}[data-book="umbrella"] .u-stars:hover{color:var(--color-text-emphasis);border-color:var(--color-border-strong);background:var(--color-surface-2)}[data-book="umbrella"] .u-stars:focus-visible{outline:none;border-color:var(--color-accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--color-accent) 30%,transparent)}[data-book="umbrella"] .u-stars__mark{display:block;flex-shrink:0}[data-book="umbrella"] .u-stars__divider{width:1px;height:14px;background:var(--color-border-subtle)}[data-book="umbrella"] .u-stars__star{display:block;flex-shrink:0;color:var(--amber-400);filter:drop-shadow(0 0 4px color-mix(in srgb,var(--amber-400) 35%,transparent))}[data-book="umbrella"] .u-stars__count{font-feature-settings:'tnum' 1;min-width:1.25ch}@media (max-width: 480px){[data-book="umbrella"] .u-stars{padding:0;width:34px;justify-content:center;gap:0}[data-book="umbrella"] .u-stars__divider,[data-book="umbrella"] .u-stars__star,[data-book="umbrella"] .u-stars__count{display:none}}[data-book="umbrella"][data-theme='dark'] .u-icon-btn__icon--sun,[data-book="umbrella"]:not([data-theme='light']) .u-icon-btn__icon--sun{display:block}[data-book="umbrella"][data-theme='dark'] .u-icon-btn__icon--moon,[data-book="umbrella"]:not([data-theme='light']) .u-icon-btn__icon--moon{display:none}[data-book="umbrella"][data-theme='light'] .u-icon-btn__icon--sun{display:none}[data-book="umbrella"][data-theme='light'] .u-icon-btn__icon--moon{display:block}[data-book="umbrella"] .u-shell{position:relative;z-index:1;width:100%;max-width:1200px;margin:0 auto;padding:clamp(var(--space-7),8vw,var(--space-9)) clamp(var(--space-4),3vw,var(--space-5)) var(--space-9);display:flex;flex-direction:column;gap:clamp(var(--space-7),7vw,var(--space-9))}[data-book="umbrella"] .u-hero{display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-5)}[data-book="umbrella"] .u-eyebrow{display:inline-flex;align-items:center;gap:0.65rem;margin:0;padding:0;font-family:var(--font-sans);font-size:0.8125rem;font-weight:500;letter-spacing:-0.005em;color:var(--color-text-secondary)}[data-book="umbrella"] .u-eyebrow__mark{display:inline-block;width:24px;height:1.5px;border-radius:2px;background:linear-gradient(90deg,var(--color-accent) 0%,color-mix(in srgb,var(--color-accent) 50%,transparent) 100%)}[data-book="umbrella"] .u-title{margin:0;font-family:var(--font-sans);font-size:clamp(1.375rem,3vw + 0.7rem,3.5rem);line-height:1.1;letter-spacing:-0.025em;font-weight:700;color:var(--color-text-emphasis);max-width:min(36ch,100%);width:100%;overflow-wrap:break-word;hyphens:auto}[data-book="umbrella"] .u-title__line,[data-book="umbrella"] .u-title__accent{display:block;white-space:normal;max-width:100%}[data-book="umbrella"] .u-title__accent{color:var(--color-accent-soft);font-weight:600}[data-book="umbrella"] .u-lede{margin:0;width:100%;max-width:52ch;font-size:clamp(1rem,0.9vw + 0.65rem,1.25rem);line-height:1.6;color:var(--color-text-secondary);overflow-wrap:break-word}[data-book="umbrella"] .u-lede strong{color:var(--color-text-emphasis);font-weight:600;font-feature-settings:'tnum' 1}[data-book="umbrella"] .u-meta{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin:var(--space-3) 0 0;padding:var(--space-4) 0 0;width:100%;max-width:56rem;border-top:1px solid var(--color-border-subtle)}[data-book="umbrella"] .u-meta__cell{position:relative;display:flex;flex-direction:column;gap:0.2rem;padding:0 var(--space-4)}[data-book="umbrella"] .u-meta__cell:first-child{padding-left:0}[data-book="umbrella"] .u-meta__cell+.u-meta__cell::before{content:'';position:absolute;left:0;top:0.15rem;bottom:0.15rem;width:1px;background:var(--color-border-subtle)}[data-book="umbrella"] .u-meta__cell dt{margin:0;font-size:0.7rem;font-weight:500;letter-spacing:0.02em;color:var(--color-text-muted)}[data-book="umbrella"] .u-meta__cell dd{margin:0;font-family:var(--font-sans);font-size:clamp(1.125rem,1.4vw + 0.4rem,1.5rem);font-weight:700;letter-spacing:-0.02em;color:var(--color-text-emphasis);font-feature-settings:'tnum' 1}@media (max-width: 600px){[data-book="umbrella"] .u-meta{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:var(--space-4)}[data-book="umbrella"] .u-meta__cell{padding:0 var(--space-3)}[data-book="umbrella"] .u-meta__cell:nth-child(2n + 1)::before{display:none}[data-book="umbrella"] .u-meta__cell:nth-child(2n + 1){padding-left:0}}[data-book="umbrella"] .u-section-head{display:flex;flex-direction:column;align-items:flex-start;gap:0.55rem;margin:0 0 var(--space-5)}[data-book="umbrella"] .u-section-head--center{align-items:center;text-align:center}[data-book="umbrella"] .u-section-head__kicker{display:inline-block;width:28px;height:2px;border-radius:2px;background:var(--color-accent);opacity:0.85}[data-book="umbrella"] .u-section-head__title{margin:0;font-family:var(--font-sans);font-size:clamp(1.5rem,2.4vw + 0.5rem,2.125rem);font-weight:700;line-height:1.15;letter-spacing:-0.025em;color:var(--color-text-emphasis);text-wrap:balance}[data-book="umbrella"] .u-section-head__sub{margin:0;max-width:52ch;font-size:1rem;line-height:1.55;color:var(--color-text-secondary)}[data-book="umbrella"] .u-shelf{position:relative}[data-book="umbrella"] .u-shelf__rack{position:absolute;left:-4%;right:-4%;bottom:0;height:3px;border-radius:2px;background:linear-gradient(90deg,transparent 0%,var(--color-border-subtle) 8%,color-mix(in srgb,var(--color-accent) 35%,var(--color-border-strong)) 50%,var(--color-border-subtle) 92%,transparent 100%);opacity:0.7;pointer-events:none}[data-book="umbrella"] .u-shelf__row{list-style:none;margin:0;padding:0 0 var(--space-3);display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(var(--space-4),1.6vw,var(--space-5));align-items:stretch}@media (max-width: 1100px){[data-book="umbrella"] .u-shelf__row{grid-template-columns:repeat(2,1fr)}}@media (max-width: 600px){[data-book="umbrella"] .u-shelf__row{grid-template-columns:1fr;gap:var(--space-5)}[data-book="umbrella"] .u-shelf__rack{display:none}}[data-book="umbrella"] .u-shelf__slot{display:flex;min-height:28rem;min-width:0}@media (max-width: 600px){[data-book="umbrella"] .u-shelf__slot{min-height:24rem}}[data-book="umbrella"] .u-book{position:relative;display:grid;grid-template-columns:48px 1fr;width:100%;border:1px solid var(--color-border-subtle);border-radius:var(--radius-lg,16px);background:linear-gradient(180deg,color-mix(in srgb,var(--color-surface-2) 70%,transparent) 0%,var(--color-surface-1) 100%);text-decoration:none;color:inherit;overflow:hidden;isolation:isolate;transform:translateY(0);box-shadow:0 1px 0 0 color-mix(in srgb,var(--color-border-strong) 40%,transparent) inset,0 18px 28px -22px color-mix(in srgb,var(--accent-700) 50%,transparent);transition:transform var(--duration-normal) var(--ease-out-expo),border-color var(--duration-normal) var(--ease-out-expo),box-shadow var(--duration-normal) var(--ease-out-expo)}[data-book="umbrella"] a.u-book{cursor:pointer}[data-book="umbrella"] a.u-book:hover{transform:translateY(-6px);border-color:color-mix(in srgb,var(--color-accent) 50%,var(--color-border-strong));box-shadow:0 1px 0 0 color-mix(in srgb,var(--color-accent) 35%,transparent) inset,0 28px 56px -22px color-mix(in srgb,var(--accent-600) 55%,transparent),0 0 0 1px color-mix(in srgb,var(--color-accent) 22%,transparent)}[data-book="umbrella"] a.u-book:focus-visible{outline:none;border-color:var(--color-accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--color-accent) 35%,transparent),0 24px 48px -16px color-mix(in srgb,var(--accent-600) 35%,transparent)}[data-book="umbrella"] .u-book__spine{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:space-between;padding:var(--space-5) 0 var(--space-4);min-width:0;overflow:hidden;background:linear-gradient(180deg,color-mix(in srgb,var(--accent-600) 85%,transparent) 0%,color-mix(in srgb,var(--accent-700) 90%,transparent) 100%);box-shadow:inset 1px 0 0 0 color-mix(in srgb,var(--accent-300) 25%,transparent),inset -1px 0 0 0 color-mix(in srgb,var(--accent-700) 50%,transparent);color:var(--accent-100);overflow:hidden}[data-book="umbrella"] .u-book__spine::before,[data-book="umbrella"] .u-book__spine::after{content:'';position:absolute;left:6px;right:6px;height:1px;background:color-mix(in srgb,var(--accent-200) 40%,transparent);opacity:0.55}[data-book="umbrella"] .u-book__spine::before{top:18px}[data-book="umbrella"] .u-book__spine::after{bottom:56px}[data-book="umbrella"] .u-book__spine-title{writing-mode:vertical-rl;transform:rotate(180deg);font-family:var(--font-sans);font-size:0.8125rem;font-weight:600;letter-spacing:0.18em;text-transform:uppercase;color:color-mix(in srgb,var(--accent-100) 92%,transparent);white-space:nowrap;user-select:none;max-height:100%;overflow:hidden}[data-book="umbrella"] .u-book__spine-glyph{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:6px;border:1px solid color-mix(in srgb,var(--accent-200) 40%,transparent);background:color-mix(in srgb,var(--accent-300) 18%,transparent);font-family:var(--font-sans);font-weight:700;font-size:0.875rem;letter-spacing:-0.01em;color:var(--accent-100);user-select:none}[data-book="umbrella"] .u-book--planning .u-book__spine{background:linear-gradient(180deg,var(--neutral-800) 0%,var(--neutral-850) 100%);box-shadow:inset 1px 0 0 0 color-mix(in srgb,var(--neutral-600) 35%,transparent),inset -1px 0 0 0 color-mix(in srgb,var(--neutral-900) 50%,transparent);color:var(--color-text-muted)}[data-book="umbrella"] .u-book--planning .u-book__spine-title{color:var(--color-text-secondary)}[data-book="umbrella"] .u-book--planning .u-book__spine-glyph{border:1px dashed color-mix(in srgb,var(--color-border-strong) 80%,transparent);background:transparent;color:var(--color-text-muted)}[data-book="umbrella"] .u-book__face{display:flex;flex-direction:column;gap:var(--space-3);padding:clamp(var(--space-5),2.4vw,var(--space-6));min-width:0}@media (max-width: 600px){[data-book="umbrella"] .u-book{grid-template-columns:64px 1fr}[data-book="umbrella"] .u-book__face{padding:var(--space-6) var(--space-5);gap:var(--space-4)}[data-book="umbrella"] .u-book__title{font-size:1.5rem}[data-book="umbrella"] .u-book__tagline{font-size:1rem}[data-book="umbrella"] .u-book__spine-title{font-size:0.875rem;letter-spacing:0.22em}[data-book="umbrella"] .u-book__spine-glyph{width:36px;height:36px;font-size:1rem}}[data-book="umbrella"] .u-book__face .u-status{margin-bottom:var(--space-2);align-self:flex-start}[data-book="umbrella"] .u-status{display:inline-flex;align-items:center;gap:0.45rem;font-family:var(--font-sans);font-size:0.7rem;font-weight:600;letter-spacing:0.04em;color:var(--color-text-secondary)}[data-book="umbrella"] .u-status[data-status='live']{color:#22c55e}[data-book="umbrella"] .u-status[data-status='beta']{color:#f59e0b}[data-book="umbrella"] .u-status[data-status='planning']{color:var(--color-text-muted)}[data-book="umbrella"] .u-status__dot{width:7px;height:7px;border-radius:50%;background:currentColor;box-shadow:0 0 6px currentColor}[data-book="umbrella"] .u-status[data-status='live'] .u-status__dot{animation:u-pulse-dot 2.6s ease-in-out infinite}@keyframes u-pulse-dot{0%,100%{box-shadow:0 0 0 0 currentColor}50%{box-shadow:0 0 0 4px color-mix(in srgb,currentColor 30%,transparent)}}[data-book="umbrella"] .u-book__title{margin:0;font-size:clamp(1.375rem,1.5vw + 0.5rem,1.625rem);font-weight:700;line-height:1.15;letter-spacing:-0.022em;color:var(--color-text-emphasis);text-wrap:balance}[data-book="umbrella"] .u-book__tagline{margin:0;font-size:0.9375rem;line-height:1.55;color:var(--color-text-secondary);flex:1}[data-book="umbrella"] .u-book__specs{display:flex;flex-wrap:wrap;gap:var(--space-4) var(--space-5);margin:var(--space-3) 0 0;padding-top:var(--space-3);border-top:1px solid var(--color-border-subtle)}[data-book="umbrella"] .u-book__spec{display:flex;flex-direction:column;gap:0.1rem}[data-book="umbrella"] .u-book__spec dt{font-size:0.7rem;font-weight:500;letter-spacing:0.02em;color:var(--color-text-muted)}[data-book="umbrella"] .u-book__spec dd{margin:0;font-family:var(--font-sans);font-size:1rem;font-weight:600;letter-spacing:-0.01em;color:var(--color-text-emphasis);font-feature-settings:'tnum' 1}[data-book="umbrella"] .u-book__cta{display:inline-flex;align-items:center;gap:0.4rem;margin-top:var(--space-3);font-size:0.875rem;font-weight:600;letter-spacing:-0.005em;color:var(--color-accent-soft)}[data-book="umbrella"] .u-book__cta svg{transition:transform var(--duration-normal) var(--ease-out-expo)}[data-book="umbrella"] a.u-book:hover .u-book__cta svg{transform:translateX(4px)}[data-book="umbrella"] .u-book__cta--muted{color:var(--color-text-muted);font-weight:500;letter-spacing:0.02em}[data-book="umbrella"] .u-book--planning{background:var(--color-surface-1);border-style:dashed;border-color:var(--color-border-subtle);box-shadow:none}[data-book="umbrella"] .u-book--planning .u-book__title,[data-book="umbrella"] .u-book--planning .u-book__tagline{color:var(--color-text-secondary)}[data-book="umbrella"] .u-book--planning .u-book__title{color:var(--color-text-emphasis);opacity:0.85}[data-book="umbrella"] .u-principles__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;border-top:1px solid var(--color-border-subtle)}[data-book="umbrella"] .u-principle{display:grid;grid-template-columns:minmax(56px,96px) 1fr;gap:clamp(var(--space-4),3vw,var(--space-6));align-items:baseline;padding:clamp(var(--space-5),3vw,var(--space-6)) 0;border-bottom:1px solid var(--color-border-subtle)}[data-book="umbrella"] .u-principle__num{font-family:var(--font-sans);font-size:clamp(1rem,1.2vw + 0.5rem,1.125rem);font-weight:600;letter-spacing:0.02em;color:var(--color-accent-soft);font-feature-settings:'tnum' 1;line-height:1.2;user-select:none}[data-book="umbrella"] .u-principle__body{display:flex;flex-direction:column;gap:var(--space-3)}[data-book="umbrella"] .u-principle h3{margin:0;font-size:clamp(1.125rem,1.4vw + 0.4rem,1.375rem);font-weight:700;letter-spacing:-0.018em;color:var(--color-text-emphasis);line-height:1.2}[data-book="umbrella"] .u-principle p{margin:0;font-size:1rem;line-height:1.6;color:var(--color-text-secondary);max-width:60ch}[data-book="umbrella"] .u-principle code{font-family:var(--font-mono);font-size:0.85em;padding:0.1em 0.4em;border-radius:4px;background:color-mix(in srgb,var(--color-accent) 12%,transparent);color:var(--color-text-emphasis)}@media (max-width: 600px){[data-book="umbrella"] .u-principle{grid-template-columns:1fr;gap:var(--space-2)}}[data-book="umbrella"] .u-final{display:flex;flex-direction:column;align-items:stretch;gap:var(--space-5);padding-top:var(--space-6)}[data-book="umbrella"] .u-final__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(var(--space-4),1.6vw,var(--space-5));width:100%;max-width:56rem;margin:0 auto}@media (max-width: 720px){[data-book="umbrella"] .u-final__grid{grid-template-columns:1fr}}[data-book="umbrella"] 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[fill="#ffe0b2"]{fill:color-mix(in srgb,var(--amber-400) 20%,var(--bg-surface-2)) !important}:root:not([data-theme="light"]) .prose .mermaid-figure svg [fill="#f8d7da"],:root:not([data-theme="light"]) .prose .mermaid-figure svg [fill="#ffcccc"],:root:not([data-theme="light"]) .prose .mermaid-figure svg [fill="#f66"],:root:not([data-theme="light"]) .prose .mermaid-figure svg [fill="#f88"],:root:not([data-theme="light"]) .prose .mermaid-figure svg [fill="#f96"]{fill:color-mix(in srgb,var(--red-500) 22%,var(--bg-surface-2)) !important}:root:not([data-theme="light"]) .prose .mermaid-figure svg [fill="#e8f4fd"]{fill:color-mix(in srgb,var(--accent-500) 20%,var(--bg-surface-2)) !important}:root:not([data-theme="light"]) .prose .mermaid-figure svg [stroke="#155724"]{stroke:var(--green-300) !important}:root:not([data-theme="light"]) .prose .mermaid-figure svg [stroke="#856404"]{stroke:var(--amber-400) !important}:root:not([data-theme="light"]) .prose .mermaid-figure svg [stroke="#721c24"],:root:not([data-theme="light"]) .prose .mermaid-figure svg [stroke="#a00"]{stroke:var(--red-300) !important}:root:not([data-theme="light"]) .prose .mermaid-figure svg [stroke="#333"]{stroke:var(--mm-border) !important}.prose pre.mermaid{display:flex;justify-content:center;align-items:center;margin:0;padding:var(--space-5);background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow-x:auto;min-height:80px;font-family:var(--font-mono);color:var(--text-muted);font-size:var(--text-sm)}.prose pre.mermaid svg{max-width:100%;height:auto}.prose pre.mermaid[data-processed="true"]{color:var(--text)}.prose .mermaid-figure>pre.mermaid{margin:0;padding:0;border:none;background:transparent;min-height:0}.mermaid-expand{position:absolute;top:var(--space-3);right:var(--space-3);display:inline-flex;align-items:center;gap:var(--space-1);height:30px;padding:0 10px 0 8px;border-radius:var(--radius-pill);font-family:var(--font-sans);font-size:11.5px;font-weight:550;letter-spacing:0.01em;color:var(--text-secondary);background:color-mix(in srgb,var(--bg-surface-2) 82%,transparent);border:1px solid var(--border);cursor:pointer;backdrop-filter:blur(8px) saturate(140%);-webkit-backdrop-filter:blur(8px) saturate(140%);box-shadow:var(--shadow-sm);opacity:0;transform:translateY(-2px);transition:opacity var(--duration-fast) var(--ease-in-out),transform var(--duration-fast) var(--ease-in-out),color var(--duration-fast),background var(--duration-fast),border-color var(--duration-fast);z-index:2}.mermaid-expand::before{content:'';position:absolute;inset:-7px}.mermaid-expand svg{display:block;flex-shrink:0}.mermaid-expand__label{font-variant-numeric:tabular-nums}.mermaid-figure:hover .mermaid-expand,.mermaid-figure:focus-within 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saturate(160%);-webkit-backdrop-filter:blur(14px) saturate(160%);box-shadow:0 10px 40px -12px rgba(0,0,0,0.55),0 2px 6px -2px rgba(0,0,0,0.3),inset 0 1px 0 0 color-mix(in srgb,white 8%,transparent);z-index:2}[data-theme="light"] .mm-lightbox__toolbar{background:color-mix(in srgb,white 82%,transparent);box-shadow:0 10px 40px -12px rgba(0,0,0,0.18),0 2px 6px -2px rgba(0,0,0,0.08),inset 0 1px 0 0 rgba(255,255,255,0.85)}.mm-lightbox__btn{appearance:none;display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;padding:0;color:var(--text-secondary);background:transparent;border:1px solid transparent;border-radius:var(--radius-pill);cursor:pointer;transition:background var(--duration-fast) var(--ease-in-out),color var(--duration-fast) var(--ease-in-out),border-color var(--duration-fast) var(--ease-in-out),transform 120ms var(--ease-in-out)}.mm-lightbox__btn:hover{color:var(--text-emphasis);background:color-mix(in srgb,var(--bg-surface-2) 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.code-tabs{position:relative;margin:var(--space-6) 0;border:1px solid var(--color-border-subtle);border-radius:var(--radius-lg,12px);overflow:hidden;background:var(--color-surface-1);box-shadow:0 1px 2px color-mix(in srgb,black 8%,transparent)}[data-book="dsa"] .code-tabs::before{content:"";position:absolute;inset:0 0 auto 0;height:2px;background:linear-gradient(90deg,transparent,var(--color-accent),transparent);opacity:0.5;z-index:1}[data-book="dsa"] .code-tabs__bar{display:flex;gap:0;padding:0 var(--space-2);border-bottom:1px solid var(--color-border-subtle);background:var(--color-surface-2);overflow-x:auto;scrollbar-width:thin;scroll-behavior:smooth;position:relative;z-index:2}[data-book="dsa"] .code-tabs__tab{position:relative;display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-3);min-height:44px;font-family:var(--font-mono);font-size:var(--text-sm);font-weight:500;color:var(--color-text-muted);background:transparent;border:0;cursor:pointer;transition:color var(--duration-fast) var(--ease-out-expo),background var(--duration-fast) var(--ease-out-expo);white-space:nowrap}[data-book="dsa"] .code-tabs__tab::after{content:"";position:absolute;left:var(--space-3);right:var(--space-3);bottom:0;height:2px;background:var(--color-accent);transform:scaleX(0);transform-origin:center;transition:transform var(--duration-medium,320ms) cubic-bezier(0.22,1,0.36,1)}[data-book="dsa"] .code-tabs__tab:hover{color:var(--color-text);background:color-mix(in srgb,var(--color-accent) 4%,transparent)}[data-book="dsa"] .code-tabs__tab:focus-visible{outline:2px solid var(--color-accent);outline-offset:-2px;z-index:3}[data-book="dsa"] .code-tabs__tab[aria-selected="true"]{color:var(--color-text-emphasis);background:var(--color-surface-1);font-weight:600}[data-book="dsa"] 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pre{margin:0;border:0;border-radius:0;background:transparent}@media (max-width: 480px){[data-book="dsa"] .code-tabs__bar{padding:0 var(--space-1)}[data-book="dsa"] .code-tabs__tab{padding:var(--space-2) var(--space-2);font-size:var(--text-xs)}}[data-book="dsa"] .code-tabs--missing{padding:var(--space-3) var(--space-4);background:var(--color-surface-2);color:var(--color-text-muted);font-size:var(--text-sm)}[data-book="dsa"] .code-tabs__missing{margin:0}[data-book="dsa"] .code-tabs__missing code{font-family:var(--font-mono);padding:2px var(--space-2);background:var(--color-surface-3);border-radius:var(--radius-sm)}[data-book="dsa"] .problem-ladder{position:relative;margin:var(--space-6) 0;padding:var(--space-4) var(--space-5) var(--space-4);border:1px solid var(--color-border-subtle);border-radius:var(--radius-lg,12px);background:linear-gradient(180deg,color-mix(in srgb,var(--color-accent) 4%,var(--color-surface-1)) 0%,var(--color-surface-1) 50%);overflow:hidden}[data-book="dsa"] .problem-ladder::before{content:"";position:absolute;inset:0 0 auto 0;height:2px;background:linear-gradient(90deg,transparent,var(--color-accent),transparent);opacity:0.65}[data-book="dsa"] .problem-ladder__title{display:flex;align-items:center;gap:var(--space-2);margin:0 0 var(--space-2);font-size:var(--text-lg);font-weight:650;letter-spacing:-0.01em;color:var(--color-text-emphasis)}[data-book="dsa"] .problem-ladder__count{margin-left:auto;font-family:var(--font-mono);font-feature-settings:"tnum";font-size:var(--text-xs);font-weight:600;letter-spacing:0.04em;color:var(--color-text-muted);padding:2px var(--space-2);border-radius:var(--radius-pill);background:color-mix(in srgb,var(--color-surface-3) 70%,transparent)}[data-book="dsa"] .problem-ladder__title::before{content:"";width:1.25rem;height:1.25rem;background-color:var(--color-accent);-webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M9 11l3 3 7-7'/><path d='M21 12c0 4.97-4.03 9-9 9s-9-4.03-9-9 4.03-9 9-9c2.39 0 4.56.93 6.18 2.45'/></svg>") center / contain no-repeat;mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M9 11l3 3 7-7'/><path d='M21 12c0 4.97-4.03 9-9 9s-9-4.03-9-9 4.03-9 9-9c2.39 0 4.56.93 6.18 2.45'/></svg>") center / contain no-repeat}[data-book="dsa"] .problem-ladder__mastery-bar{height:2px;margin:0 0 var(--space-4);background:color-mix(in srgb,var(--color-surface-3) 60%,transparent);border-radius:var(--radius-pill);overflow:hidden}[data-book="dsa"] .problem-ladder__mastery-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent-400),var(--color-accent));border-radius:var(--radius-pill);transition:width 480ms cubic-bezier(0.22,1,0.36,1)}[data-book="dsa"] .problem-ladder__mastery-bar[data-complete="true"] .problem-ladder__mastery-fill{background:linear-gradient(90deg,var(--color-difficulty-easy-fg),color-mix(in srgb,var(--color-difficulty-easy-fg) 70%,white))}[data-book="dsa"] .problem-ladder__group{margin:0 0 var(--space-4)}[data-book="dsa"] .problem-ladder__group:last-child{margin-bottom:0}[data-book="dsa"] .problem-ladder__group-title{margin:0 0 var(--space-2);font-size:var(--text-xs);font-weight:600;text-transform:uppercase;letter-spacing:0.1em;color:var(--color-text-muted)}[data-book="dsa"] .problem-ladder__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-2)}[data-book="dsa"] .problem-ladder__item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-3);border-radius:var(--radius-md);background:var(--color-surface-2);border:1px solid transparent;transition:background var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo),transform var(--duration-fast) var(--ease-out-expo),box-shadow var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .problem-ladder__item:hover{background:var(--color-surface-3);border-color:var(--color-border-subtle);transform:translateX(2px);box-shadow:0 2px 8px -4px color-mix(in srgb,var(--color-accent) 30%,transparent)}[data-book="dsa"] .problem-ladder__item:has(.problem-ladder__check:checked){background:color-mix(in srgb,var(--color-accent) 5%,var(--color-surface-2));border-color:color-mix(in srgb,var(--color-accent) 30%,transparent)}[data-book="dsa"] .problem-ladder__item:has(.problem-ladder__check:checked) .problem-ladder__link{color:var(--color-text-muted)}[data-book="dsa"] .problem-ladder__item:has(.problem-ladder__check:checked) .problem-ladder__link::after{content:" ✓";color:var(--color-difficulty-easy-fg);font-weight:700}[data-book="dsa"] .problem-ladder__item[data-flash="true"]{animation:problem-ladder-flash 600ms cubic-bezier(0.22,1,0.36,1)}@keyframes problem-ladder-flash{0%{background:color-mix(in srgb,var(--color-accent) 35%,var(--color-surface-2));transform:translateX(2px) scale(1.01)}100%{background:color-mix(in srgb,var(--color-accent) 5%,var(--color-surface-2));transform:none}}@media (prefers-reduced-motion: reduce){[data-book="dsa"] .problem-ladder__item[data-flash="true"]{animation:none}}[data-book="dsa"] .problem-ladder__check{flex:0 0 auto;width:18px;height:18px;margin:0;cursor:pointer;accent-color:var(--color-accent)}[data-book="dsa"] .problem-ladder__link{flex:1 1 auto;min-width:0;color:var(--color-text-emphasis);text-decoration:none;font-weight:500;display:inline-flex;align-items:center;gap:var(--space-2);flex-wrap:wrap;min-height:28px;word-break:break-word;transition:color var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .problem-ladder__link:hover{color:var(--color-accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}[data-book="dsa"] .problem-ladder__lc-id{font-family:var(--font-mono);font-size:var(--text-xs);font-weight:600;flex:0 0 auto;white-space:nowrap;padding:2px var(--space-2);color:var(--color-text-muted);background:var(--color-surface-3);border-radius:var(--radius-sm);letter-spacing:0.04em}[data-book="dsa"] .problem-ladder__star{display:inline-flex;align-items:center;gap:4px;flex:0 0 auto;white-space:nowrap;padding:2px var(--space-2);font-size:var(--text-xs);font-weight:700;letter-spacing:0.04em;border-radius:var(--radius-pill);background:linear-gradient(135deg,#fde68a 0%,#f59e0b 100%);color:#78350f;border:1px solid color-mix(in srgb,#f59e0b 50%,transparent);box-shadow:0 0 12px -4px color-mix(in srgb,#f59e0b 60%,transparent)}[data-book="dsa"] .problem-ladder__group:has(.problem-ladder__star) .problem-ladder__item{background:linear-gradient(180deg,color-mix(in srgb,#fbbf24 8%,var(--color-surface-2)) 0%,var(--color-surface-2) 80%);border-color:color-mix(in srgb,#f59e0b 22%,transparent)}[data-book="dsa"] .problem-ladder__group:has(.problem-ladder__star) .problem-ladder__item:hover{border-color:color-mix(in srgb,#f59e0b 50%,transparent);box-shadow:0 4px 14px -6px color-mix(in srgb,#f59e0b 50%,transparent)}[data-book="dsa"] .problem-ladder__difficulty{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;margin-left:auto;border-radius:50%;font-family:var(--font-mono);font-size:var(--text-xs);font-weight:700;flex:0 0 auto;border:1px solid transparent}[data-book="dsa"] .problem-ladder__difficulty[data-difficulty="easy"]{background:var(--color-difficulty-easy-bg);color:var(--color-difficulty-easy-fg);border-color:color-mix(in srgb,var(--color-difficulty-easy-fg) 30%,transparent)}[data-book="dsa"] 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.problem-ladder__more-inner{opacity:0;filter:blur(6px);pointer-events:none}[data-book="dsa"] .problem-ladder__more[data-expanded="true"] .problem-ladder__more-inner{opacity:1;filter:none;pointer-events:auto}[data-book="dsa"] .problem-ladder__more-inner>.problem-ladder__group:first-child{margin-top:var(--space-4)}[data-book="dsa"] .problem-ladder__more-inner>.problem-ladder__group:last-child{margin-bottom:0}[data-book="dsa"] .problem-ladder__more[data-expanded="false"] .problem-ladder__item{opacity:0;transform:translateY(8px)}[data-book="dsa"] .problem-ladder__more[data-expanded="true"] .problem-ladder__item{opacity:1;transform:translateY(0);transition:opacity 360ms cubic-bezier(0.22,1,0.36,1),transform 360ms cubic-bezier(0.22,1,0.36,1),background var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo),box-shadow var(--duration-fast) var(--ease-out-expo);transition-delay:calc(120ms + var(--i,0) * 60ms)}@media (prefers-reduced-motion: 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var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo),box-shadow var(--duration-fast) var(--ease-out-expo),background var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .problem-ladder__reveal:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--color-accent) 55%,transparent);background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-2));box-shadow:0 1px 0 inset color-mix(in srgb,white 14%,transparent),0 12px 28px -10px color-mix(in srgb,var(--color-accent) 70%,transparent)}[data-book="dsa"] .problem-ladder__reveal:focus-visible{outline:2px solid var(--color-accent);outline-offset:3px}[data-book="dsa"] .problem-ladder__reveal-chevron{transition:transform var(--duration-medium,320ms) var(--ease-out-expo)}[data-book="dsa"] .problem-ladder__reveal[aria-expanded="true"] .problem-ladder__reveal-chevron{transform:rotate(180deg)}@media (prefers-reduced-motion: reduce){[data-book="dsa"] 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.algostep__stat-value{color:var(--color-difficulty-medium-fg,#b88515);background:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 12%,var(--color-surface-3))}[data-book="dsa"] .algostep__counts{display:flex;flex-wrap:wrap;gap:var(--space-2);padding:var(--space-2) var(--space-3);background:color-mix(in srgb,var(--color-surface-2) 80%,transparent);border:1px solid var(--color-border-subtle);border-radius:var(--radius-md)}[data-book="dsa"] .algostep__counts[data-populated="false"]{display:none}[data-book="dsa"] .algostep__count{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;background:var(--color-surface-3);border:1px solid var(--color-border-subtle);border-radius:var(--radius-pill,999px);font-family:var(--font-mono);font-size:var(--text-xs);font-feature-settings:"tnum"}[data-book="dsa"] .algostep__count[data-value="0"]{opacity:0.45}[data-book="dsa"] .algostep__count:not([data-value="0"]){border-color:color-mix(in srgb,var(--color-accent) 35%,var(--color-border-subtle));background:color-mix(in srgb,var(--color-accent) 8%,var(--color-surface-3))}[data-book="dsa"] .algostep__count-key{color:var(--color-text-muted)}[data-book="dsa"] .algostep__count-value{color:var(--color-text-emphasis);font-weight:600}[data-book="dsa"] .algostep__count[data-state="hit"]{background:color-mix(in srgb,#009E73 22%,var(--color-surface-3));border-color:#009E73;box-shadow:0 0 0 2px color-mix(in srgb,#009E73 35%,transparent)}[data-book="dsa"] .algostep__count[data-state="miss"]{background:color-mix(in srgb,#D55E00 18%,var(--color-surface-3));border-color:#D55E00;text-decoration:line-through;text-decoration-color:color-mix(in srgb,#D55E00 70%,transparent)}[data-book="dsa"] .algostep__count[data-state="lookup"]{outline:2px dashed color-mix(in srgb,var(--color-accent) 60%,transparent);outline-offset:1px}[data-book="dsa"] .algostep__count[data-phantom="true"]{opacity:0.7;border-style:dashed}[data-book="dsa"] .algostep__prefix-row{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(2.5rem,3.5rem);gap:var(--space-2)}[data-book="dsa"] .algostep__prefix-row[data-populated="false"]{display:none}[data-book="dsa"] .algostep__compare{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);font-family:var(--font-mono);font-feature-settings:"tnum";border:1px solid color-mix(in srgb,var(--color-accent) 22%,var(--color-border-subtle));border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-accent) 5%,var(--color-surface-2))}[data-book="dsa"] .algostep__compare[data-populated="false"]{display:none}[data-book="dsa"] .algostep__compare-chip{display:inline-flex;align-items:center;padding:3px 10px;font-size:var(--text-xs);font-weight:600;color:var(--color-text-emphasis);background:var(--color-surface-3);border-radius:var(--radius-pill,999px);border:1px solid var(--color-border-subtle)}[data-book="dsa"] .algostep__compare-chip[data-kind="verdict"]{background:var(--color-accent);color:white;border-color:var(--color-accent)}[data-book="dsa"] .algostep__compare-arrow{font-size:var(--text-base);font-weight:700;color:var(--color-accent)}[data-book="dsa"] .algostep__compare[data-verdict="equal"] .algostep__compare-chip[data-kind="verdict"]{background:var(--color-difficulty-easy-fg);border-color:var(--color-difficulty-easy-fg)}[data-book="dsa"] .algostep__compare[data-verdict="le_pivot"] .algostep__compare-chip,[data-book="dsa"] .algostep__compare[data-verdict="less"] .algostep__compare-chip{border-color:color-mix(in srgb,var(--color-accent) 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__interval-header{display:flex;align-items:center;gap:var(--space-2);align-self:center}[data-book="dsa"] .algostep__interval-target{display:inline-flex;padding:3px 10px;font-family:var(--font-mono);font-size:var(--text-xs);font-weight:600;border-radius:var(--radius-pill,999px);background:var(--color-surface-3);color:var(--color-text-emphasis);border:1px solid var(--color-border-subtle)}[data-book="dsa"] .algostep__interval-sorted{display:inline-flex;padding:3px 10px;font-family:var(--font-mono);font-size:var(--text-xs);font-weight:600;border-radius:var(--radius-pill,999px);background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-3));color:var(--color-accent);border:1px solid color-mix(in srgb,var(--color-accent) 35%,var(--color-border-subtle))}[data-book="dsa"] .algostep__interval-sorted[data-populated="false"]{display:none}[data-book="dsa"] .algostep__recurse-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border:1px dashed color-mix(in srgb,var(--color-accent) 30%,var(--color-border-subtle));border-radius:var(--radius-md);background:color-mix(in srgb,var(--color-accent) 4%,var(--color-surface-2));font-family:var(--font-mono);font-size:var(--text-xs)}[data-book="dsa"] .algostep__recurse-row[data-populated="false"]{display:none}[data-book="dsa"] .algostep__recurse-label{font-weight:700;color:var(--color-accent);text-transform:uppercase;letter-spacing:0.06em}[data-book="dsa"] .algostep__recurse-range{font-family:var(--font-mono);padding:2px 8px;background:var(--color-surface-3);border-radius:var(--radius-sm);color:var(--color-text-emphasis)}[data-book="dsa"] .algostep__recurse-depth,[data-book="dsa"] .algostep__recurse-decision{color:var(--color-text-muted)}[data-book="dsa"] .algostep__hash-readout{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);background:color-mix(in srgb,var(--color-accent) 6%,var(--color-surface-2));border:1px solid color-mix(in srgb,var(--color-accent) 30%,var(--color-border-subtle));border-radius:var(--radius-md);font-family:var(--font-mono);font-size:var(--text-xs);align-self:center}[data-book="dsa"] .algostep__hash-readout[data-populated="false"]{display:none}[data-book="dsa"] .algostep__hash-readout-label{font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:var(--color-accent)}[data-book="dsa"] .algostep__hash-readout-expr{color:var(--color-text-emphasis);font-feature-settings:"tnum"}[data-book="dsa"] .algostep__hash-op{display:inline-flex;align-items:center;gap:var(--space-2);align-self:center;padding:4px 12px;border-radius:var(--radius-pill,999px);background:var(--color-surface-3);border:1px solid var(--color-border-subtle);font-family:var(--font-mono);font-size:var(--text-xs)}[data-book="dsa"] .algostep__hash-op[data-populated="false"]{display:none}[data-book="dsa"] .algostep__hash-op-label{font-weight:700;letter-spacing:0.08em;padding:1px 6px;border-radius:var(--radius-sm);background:var(--color-accent);color:white}[data-book="dsa"] .algostep__hash-op[data-kind="lookup"] .algostep__hash-op-label{background:var(--color-difficulty-medium-fg,#b88515)}[data-book="dsa"] .algostep__hash-op-key,[data-book="dsa"] .algostep__hash-op-value{color:var(--color-text-emphasis);font-weight:600}[data-book="dsa"] .algostep__hash-op-arrow{color:var(--color-text-muted)}[data-book="dsa"] .algostep__bucket-grid{display:flex;flex-direction:column;gap:var(--space-1);width:100%}[data-book="dsa"] .algostep__bucket{display:grid;grid-template-columns:2.4rem 1fr;align-items:center;gap:var(--space-2);padding:6px 8px;background:var(--color-surface-2);border:1px solid var(--color-border-subtle);border-radius:var(--radius-md);transition:background var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .algostep__bucket[data-active="true"]{background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-2));border-color:var(--color-accent);box-shadow:0 4px 12px -4px color-mix(in srgb,var(--color-accent) 50%,transparent)}[data-book="dsa"] .algostep__bucket-index{font-family:var(--font-mono);font-size:var(--text-xs);font-weight:700;color:var(--color-text-muted);text-align:center}[data-book="dsa"] .algostep__bucket[data-active="true"] .algostep__bucket-index{color:var(--color-accent)}[data-book="dsa"] .algostep__chain{display:flex;flex-wrap:wrap;align-items:center;gap:4px}[data-book="dsa"] .algostep__chain-empty{font-family:var(--font-mono);font-size:var(--text-base);color:var(--color-text-muted);opacity:0.5}[data-book="dsa"] .algostep__chain-link{color:var(--color-text-muted);font-family:var(--font-mono)}[data-book="dsa"] .algostep__chain-node{display:inline-flex;align-items:center;gap:2px;padding:3px 8px;background:var(--color-surface-3);border:1px solid var(--color-border-subtle);border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:var(--text-xs)}[data-book="dsa"] .algostep__chain-node[data-kind="placed"]{background:color-mix(in srgb,var(--color-difficulty-easy-fg) 18%,var(--color-surface-3));border-color:var(--color-difficulty-easy-fg);animation:algostep-pop 380ms cubic-bezier(0.22,1,0.36,1)}[data-book="dsa"] .algostep__chain-node[data-kind="updated"]{background:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 18%,var(--color-surface-3));border-color:var(--color-difficulty-medium-fg,#b88515)}[data-book="dsa"] .algostep__chain-node[data-kind="hit"]{background:color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-3));border-color:var(--color-accent);color:white;animation:algostep-pop 380ms cubic-bezier(0.22,1,0.36,1)}[data-book="dsa"] .algostep__chain-node[data-kind="scanning"]{outline:2px dashed color-mix(in srgb,var(--color-accent) 70%,transparent);outline-offset:1px}[data-book="dsa"] .algostep__chain-node[data-kind="rehashed"]{animation:algostep-pop 320ms cubic-bezier(0.22,1,0.36,1)}[data-book="dsa"] .algostep__chain-key{color:var(--color-text-emphasis);font-weight:600}[data-book="dsa"] .algostep__chain-sep{color:var(--color-text-muted)}[data-book="dsa"] .algostep__chain-value{color:var(--color-text)}[data-book="dsa"] .algostep__hash-result{align-self:center;padding:4px 14px;border-radius:var(--radius-pill,999px);font-family:var(--font-mono);font-size:var(--text-xs);font-weight:700}[data-book="dsa"] .algostep__hash-result[data-populated="false"]{display:none}[data-book="dsa"] .algostep__hash-result[data-kind="success"]{background:color-mix(in srgb,var(--color-difficulty-easy-fg) 18%,var(--color-surface-3));color:var(--color-difficulty-easy-fg);border:1px solid var(--color-difficulty-easy-fg)}[data-book="dsa"] .algostep__hash-result[data-kind="danger"]{background:color-mix(in srgb,var(--color-difficulty-hard-fg,#c1432a) 18%,var(--color-surface-3));color:var(--color-difficulty-hard-fg,#c1432a);border:1px solid var(--color-difficulty-hard-fg,#c1432a)}[data-book="dsa"] .algostep__hash-row{display:flex;flex-direction:column;gap:var(--space-1);width:100%}[data-book="dsa"] .algostep__hash-row[data-populated="false"]{display:none}[data-book="dsa"] .algostep__matrix{display:grid;grid-template-columns:repeat(var(--matrix-size,4),minmax(2.5rem,3.25rem));grid-auto-rows:minmax(2.5rem,3.25rem);gap:6px;padding:var(--space-2);background:var(--color-surface-2);border-radius:var(--radius-md);border:1px solid var(--color-border-subtle)}[data-book="dsa"] .algostep__matrix-cell{display:flex;align-items:center;justify-content:center;background:var(--color-surface-3);border:1px solid var(--color-border-subtle);border-radius:var(--radius-sm);font-family:var(--font-mono);font-feature-settings:"tnum";font-weight:600;color:var(--color-text-emphasis);position:relative;transition:background var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo),transform var(--duration-fast) var(--ease-out-expo),opacity var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .algostep__matrix-cell[data-state="inactive"]{opacity:0.32}[data-book="dsa"] .algostep__matrix-cell[data-state="on-layer"]{background:color-mix(in srgb,var(--color-accent) 12%,var(--color-surface-3));border-color:color-mix(in srgb,var(--color-accent) 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__matrix-cell[data-state="cycle"]{background:linear-gradient(135deg,color-mix(in srgb,var(--color-accent) 35%,var(--color-surface-3)),color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-3)));border-color:var(--color-accent);color:white;transform:scale(1.05);box-shadow:0 6px 16px -6px color-mix(in srgb,var(--color-accent) 70%,transparent)}[data-book="dsa"] .algostep__matrix-cell[data-state="cycle"]::after{content:attr(data-cycle-pos);position:absolute;top:2px;right:4px;font-size:0.6rem;color:white;opacity:0.85}[data-book="dsa"] .algostep__matrix-cell[data-state="final"]{background:color-mix(in srgb,var(--color-difficulty-easy-fg) 22%,var(--color-surface-3));border-color:var(--color-difficulty-easy-fg);color:white}[data-book="dsa"] .algostep__stack-wrap{display:flex;flex-direction:column;align-items:center;gap:6px}[data-book="dsa"] .algostep__stack-axis-label{font-family:var(--font-mono);font-size:0.65rem;text-transform:uppercase;letter-spacing:0.1em;color:var(--color-text-muted)}[data-book="dsa"] .algostep__stack{display:flex;flex-direction:column;gap:4px;min-width:16rem;padding:var(--space-2);background:var(--color-surface-2);border:1px solid var(--color-border-subtle);border-radius:var(--radius-md)}[data-book="dsa"] .algostep__frame{display:flex;flex-direction:column;gap:2px;padding:8px 12px;background:var(--color-surface-3);border:1px solid var(--color-border-subtle);border-radius:var(--radius-sm);font-family:var(--font-mono);transition:background var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo),transform var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .algostep__frame[data-active="true"]{background:color-mix(in srgb,var(--color-accent) 16%,var(--color-surface-3));border-color:var(--color-accent);box-shadow:0 4px 12px -4px color-mix(in srgb,var(--color-accent) 50%,transparent)}[data-book="dsa"] .algostep__frame[data-role="base"]{border-color:var(--color-difficulty-easy-fg);background:color-mix(in srgb,var(--color-difficulty-easy-fg) 18%,var(--color-surface-3))}[data-book="dsa"] .algostep__frame[data-role="returning"]{border-color:var(--color-difficulty-medium-fg,#b88515);background:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 14%,var(--color-surface-3))}[data-book="dsa"] .algostep__frame[data-role="pushed"]{animation:algostep-pop 320ms cubic-bezier(0.22,1,0.36,1)}[data-book="dsa"] .algostep__frame-head{display:flex;align-items:center;gap:8px;font-size:var(--text-sm);font-weight:700}[data-book="dsa"] .algostep__frame-name{color:var(--color-text-emphasis)}[data-book="dsa"] .algostep__frame-arg{font-size:var(--text-xs);font-weight:500;color:var(--color-text-muted)}[data-book="dsa"] .algostep__frame-return{font-size:var(--text-xs);color:var(--color-difficulty-easy-fg);font-weight:600}[data-book="dsa"] .algostep__frame-status{font-size:var(--text-xs);color:var(--color-text-muted);font-style:italic}[data-book="dsa"] .algostep__stack-empty{padding:var(--space-3);font-family:var(--font-mono);font-size:var(--text-xs);color:var(--color-text-muted);text-align:center;font-style:italic}[data-book="dsa"] .algostep__answer-card{align-self:center;display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);background:linear-gradient(135deg,color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-3)),color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-3)));border:1px solid var(--color-accent);border-radius:var(--radius-md);font-family:var(--font-mono);box-shadow:0 6px 18px -6px color-mix(in srgb,var(--color-accent) 50%,transparent)}[data-book="dsa"] .algostep__answer-card[data-populated="false"]{display:none}[data-book="dsa"] .algostep__answer-label{font-size:0.65rem;text-transform:uppercase;letter-spacing:0.1em;color:var(--color-accent);font-weight:700}[data-book="dsa"] .algostep__answer-value{font-size:var(--text-base);font-weight:700;color:var(--color-text-emphasis)}[data-book="dsa"] .algostep__tri-stack{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3);align-items:start}[data-book="dsa"] .algostep__tri-col{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-2);border:1px solid var(--color-border-subtle);border-radius:var(--radius-md);background:var(--color-surface-1);transition:opacity var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .algostep__tri-col[data-active="false"]{opacity:0.55}[data-book="dsa"] .algostep__tri-col[data-active="true"]{border-color:color-mix(in srgb,var(--color-accent) 60%,var(--color-border-subtle));box-shadow:0 4px 14px -8px color-mix(in srgb,var(--color-accent) 50%,transparent)}[data-book="dsa"] .algostep__tri-col[data-finished="true"] .algostep__stack-empty{color:var(--color-difficulty-easy-fg);font-style:normal}[data-book="dsa"] .algostep__tri-header{font-family:var(--font-mono);font-size:0.7rem;font-weight:700;text-transform:uppercase;letter-spacing:0.08em;color:var(--color-text-emphasis);text-align:center;padding:4px 0;border-bottom:1px solid var(--color-border-subtle)}[data-book="dsa"] .algostep__tri-col .algostep__stack{min-width:auto;width:100%}[data-book="dsa"] .algostep__tri-col .algostep__frame{padding:6px 8px;font-size:var(--text-xs)}[data-book="dsa"] .algostep__tri-col .algostep__frame-head{font-size:var(--text-xs)}[data-book="dsa"] .algostep__tri-meta{display:flex;flex-wrap:wrap;gap:4px;padding-top:var(--space-2);border-top:1px dashed var(--color-border-subtle)}[data-book="dsa"] .algostep__tri-pill{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;font-family:var(--font-mono);font-size:0.65rem;background:var(--color-surface-2);border:1px solid var(--color-border-subtle);border-radius:var(--radius-pill,999px);color:var(--color-text-emphasis)}[data-book="dsa"] .algostep__tri-pill[data-kind="accent"]{background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-2));border-color:color-mix(in srgb,var(--color-accent) 40%,var(--color-border-subtle));color:var(--color-text-emphasis)}[data-book="dsa"] .algostep__tri-pill-label{text-transform:uppercase;letter-spacing:0.06em;color:var(--color-text-muted);font-weight:600}[data-book="dsa"] .algostep__tri-pill-value{font-weight:700}[data-book="dsa"] .algostep__tri-merge{display:flex;align-items:center;gap:6px;flex-basis:100%;padding:4px 6px;background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-2));border:1px solid color-mix(in srgb,var(--color-accent) 35%,var(--color-border-subtle));border-radius:var(--radius-sm);margin-top:2px}[data-book="dsa"] .algostep__tri-merge-label{font-family:var(--font-mono);font-size:0.65rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:var(--color-accent)}[data-book="dsa"] .algostep__tri-merge-detail{font-family:var(--font-mono);font-size:0.7rem;color:var(--color-text-emphasis)}@media (max-width: 720px){[data-book="dsa"] .algostep__tri-stack{grid-template-columns:1fr}}[data-book="dsa"] .algostep__merge-tree{display:flex;align-items:center;gap:var(--space-2);align-self:center;font-family:var(--font-mono);font-size:var(--text-xs)}[data-book="dsa"] .algostep__merge-tree[data-populated="false"]{display:none}[data-book="dsa"] .algostep__merge-tree-lane{display:inline-flex;align-items:center}[data-book="dsa"] .algostep__merge-tree-span{display:inline-block;padding:3px 10px;border-radius:var(--radius-pill,999px);background:var(--color-surface-3);border:1px solid var(--color-border-subtle);color:var(--color-text-emphasis);font-weight:600}[data-book="dsa"] .algostep__merge-tree-span[data-kind="divide"]{background:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 14%,var(--color-surface-3));border-color:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__merge-tree-span[data-kind="merge"]{background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-3));border-color:color-mix(in srgb,var(--color-accent) 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__merge-tree-depth{display:inline-flex;font-size:var(--text-xs);border-radius:var(--radius-pill,999px);overflow:hidden;border:1px solid var(--color-border-subtle)}[data-book="dsa"] .algostep__merge-tree-depth-key{padding:2px 7px;background:var(--color-surface-3);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:0.06em;font-weight:600;font-size:0.65rem}[data-book="dsa"] .algostep__merge-tree-depth-value{padding:2px 8px;background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-3));color:var(--color-accent);font-weight:700}[data-book="dsa"] .algostep__merge-range{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-2)}[data-book="dsa"] .algostep__merge-range[data-populated="false"]{display:none}[data-book="dsa"] .algostep__merge-range-chip{display:inline-flex;border-radius:var(--radius-pill,999px);border:1px solid var(--color-border-subtle);overflow:hidden;font-family:var(--font-mono);font-size:var(--text-xs)}[data-book="dsa"] .algostep__merge-range-key{padding:3px 8px;background:var(--color-surface-3);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:0.06em;font-weight:600}[data-book="dsa"] .algostep__merge-range-value{padding:3px 10px;background:color-mix(in srgb,var(--color-surface-3) 70%,var(--color-surface-2));color:var(--color-text-emphasis);font-weight:700}[data-book="dsa"] .algostep__merge-range-chip[data-kind="divide"] .algostep__merge-range-value{background:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 14%,var(--color-surface-3));color:var(--color-difficulty-medium-fg,#b88515)}[data-book="dsa"] .algostep__merge-range-chip[data-kind="merge"] .algostep__merge-range-value,[data-book="dsa"] .algostep__merge-range-chip[data-kind="merge-done"] .algostep__merge-range-value{background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-3));color:var(--color-accent)}[data-book="dsa"] .algostep__merge-range-chip[data-kind="merge-left"] .algostep__merge-range-value{background:color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-3));color:var(--color-accent)}[data-book="dsa"] .algostep__merge-range-chip[data-kind="merge-right"] .algostep__merge-range-value{background:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 18%,var(--color-surface-3));color:var(--color-difficulty-medium-fg,#b88515)}[data-book="dsa"] .algostep__merge-range-chip[data-kind="success"] .algostep__merge-range-value{background:color-mix(in srgb,var(--color-difficulty-easy-fg) 18%,var(--color-surface-3));color:var(--color-difficulty-easy-fg)}[data-book="dsa"] .algostep__merge-panel{display:flex;flex-direction:column;gap:6px;padding:var(--space-2) var(--space-3);background:color-mix(in srgb,var(--color-surface-2) 75%,transparent);border:1px solid var(--color-border-subtle);border-radius:var(--radius-md)}[data-book="dsa"] .algostep__merge-panel[data-populated="false"]{display:none}[data-book="dsa"] .algostep__merge-slice{display:grid;grid-template-columns:4rem 1fr;align-items:center;gap:var(--space-2)}[data-book="dsa"] .algostep__merge-slice-label{font-family:var(--font-mono);font-size:var(--text-xs);font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:var(--color-text-muted);padding:2px 8px;background:var(--color-surface-3);border-radius:var(--radius-pill,999px);border:1px solid var(--color-border-subtle);text-align:center}[data-book="dsa"] .algostep__merge-slice-label[data-kind="left"]{color:var(--color-accent);border-color:color-mix(in srgb,var(--color-accent) 40%,var(--color-border-subtle))}[data-book="dsa"] .algostep__merge-slice-label[data-kind="right"]{color:var(--color-difficulty-medium-fg,#b88515);border-color:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 40%,var(--color-border-subtle))}[data-book="dsa"] .algostep__merge-slice-label[data-kind="out"]{color:var(--color-difficulty-easy-fg);border-color:color-mix(in srgb,var(--color-difficulty-easy-fg) 40%,var(--color-border-subtle))}[data-book="dsa"] .algostep__merge-slice-cells{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(2rem,2.6rem);gap:4px}[data-book="dsa"] .algostep__merge-slice-cell{display:flex;align-items:center;justify-content:center;min-height:2.4rem;background:var(--color-surface-3);border:1px solid var(--color-border-subtle);border-radius:var(--radius-sm);font-family:var(--font-mono);font-feature-settings:"tnum";font-weight:600;color:var(--color-text-emphasis);transition:background var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .algostep__merge-slice-cell[data-state="pointer"]{border-color:var(--color-accent);background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-3))}[data-book="dsa"] .algostep__merge-slice-cell[data-state="consumed"]{opacity:0.35;text-decoration:line-through}[data-book="dsa"] .algostep__merge-slice-cell[data-state="emitted"]{background:color-mix(in srgb,var(--color-difficulty-easy-fg) 14%,var(--color-surface-3));border-color:color-mix(in srgb,var(--color-difficulty-easy-fg) 40%,var(--color-border-subtle));color:var(--color-difficulty-easy-fg)}[data-book="dsa"] .algostep__merge-slice-cell[data-state="merged"]{background:color-mix(in srgb,var(--color-difficulty-easy-fg) 22%,var(--color-surface-3));border-color:var(--color-difficulty-easy-fg);color:white}[data-book="dsa"] .algostep__merge-slice-cell[data-emphasis="just-emitted"]{animation:algostep-pop 380ms cubic-bezier(0.22,1,0.36,1);background:color-mix(in srgb,var(--color-difficulty-easy-fg) 22%,var(--color-surface-3));border-color:var(--color-difficulty-easy-fg);color:white}[data-book="dsa"] .algostep__merge-slice-cell[data-emphasis="taking"]{animation:algostep-pop 380ms cubic-bezier(0.22,1,0.36,1)}[data-book="dsa"] .algostep__merge-slice-cell[data-empty="true"]{background:transparent;border-style:dashed;color:var(--color-text-muted);opacity:0.5}[data-book="dsa"] .algostep__narration{margin:0;padding:var(--space-3) var(--space-4);font-size:var(--text-sm);line-height:1.55;color:var(--color-text);background:color-mix(in srgb,var(--color-accent) 5%,var(--color-surface-1));border-left:3px solid var(--color-accent);border-radius:var(--radius-md);min-height:3rem;display:flex;align-items:center;transition:background var(--duration-medium,320ms) var(--ease-out-expo),border-left-color var(--duration-medium,320ms) var(--ease-out-expo)}[data-book="dsa"] .algostep__narration[data-kind="done"],[data-book="dsa"] .algostep__narration[data-kind="answer"]{background:color-mix(in srgb,var(--color-difficulty-easy-fg) 10%,var(--color-surface-1));border-left-color:var(--color-difficulty-easy-fg)}[data-book="dsa"] .algostep__narration[data-kind="absent"],[data-book="dsa"] .algostep__narration[data-kind="miss"]{background:color-mix(in srgb,var(--color-difficulty-hard-fg,#c1432a) 10%,var(--color-surface-1));border-left-color:var(--color-difficulty-hard-fg,#c1432a)}[data-book="dsa"] .algostep__narration[data-kind="check"],[data-book="dsa"] .algostep__narration[data-kind="baseCase"]{background:color-mix(in srgb,var(--color-difficulty-medium-fg,#b88515) 10%,var(--color-surface-1));border-left-color:var(--color-difficulty-medium-fg,#b88515)}[data-book="dsa"] .algostep__controls{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);flex-wrap:wrap}[data-book="dsa"] .algostep__btn-group{display:flex;align-items:center;gap:var(--space-2);flex-wrap:wrap}[data-book="dsa"] .algostep__btn-group--right{margin-left:auto;gap:var(--space-3)}[data-book="dsa"] .algostep__btn{display:inline-flex;align-items:center;justify-content:center;width:2.25rem;height:2.25rem;padding:0;border-radius:var(--radius-md);background:var(--color-surface-3);color:var(--color-text);border:1px solid var(--color-border-subtle);cursor:pointer;transition:background var(--duration-fast) var(--ease-out-expo),color var(--duration-fast) var(--ease-out-expo),border-color var(--duration-fast) var(--ease-out-expo),transform var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .algostep__btn:hover{background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-3));color:var(--color-accent);border-color:color-mix(in srgb,var(--color-accent) 40%,var(--color-border-subtle))}[data-book="dsa"] .algostep__btn:active{transform:translateY(1px)}[data-book="dsa"] .algostep__btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}[data-book="dsa"] .algostep__btn:disabled{opacity:0.45;cursor:not-allowed;pointer-events:none}[data-book="dsa"] .algostep__btn--primary{width:2.75rem;height:2.75rem;background:var(--color-accent);color:white;border-color:var(--color-accent);box-shadow:0 4px 14px -4px color-mix(in srgb,var(--color-accent) 60%,transparent),0 0 0 3px color-mix(in srgb,var(--color-accent) 18%,transparent)}[data-book="dsa"] .algostep__btn--primary:hover{background:color-mix(in srgb,var(--color-accent) 90%,white 10%);color:white;transform:translateY(-1px);box-shadow:0 6px 18px -4px color-mix(in srgb,var(--color-accent) 70%,transparent),0 0 0 4px color-mix(in srgb,var(--color-accent) 22%,transparent)}[data-book="dsa"] .algostep__icon{display:block}[data-book="dsa"] .algostep__counter{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--color-text-muted);font-feature-settings:"tnum";white-space:nowrap}[data-book="dsa"] .algostep__speed{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:var(--text-xs);color:var(--color-text-muted)}[data-book="dsa"] .algostep__speed-label{text-transform:uppercase;letter-spacing:0.08em;font-weight:600}[data-book="dsa"] .algostep__speed-select{padding:3px 8px;background:var(--color-surface-3);color:var(--color-text-emphasis);border:1px solid var(--color-border-subtle);border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:var(--text-xs);cursor:pointer}[data-book="dsa"] .algostep__speed-select:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}html.algostep-modal-open{overflow:hidden}[data-book="dsa"] .prose .algostep--expanded,[data-book="dsa"] .algostep--expanded{position:fixed;inset:0;z-index:var(--z-modal,90);margin:0;padding:clamp(var(--space-3),3vw,var(--space-6));display:flex;flex-direction:column;align-items:stretch;justify-content:center;border:none;border-radius:0;box-shadow:none;background:rgba(0,0,0,0.55);-webkit-backdrop-filter:blur(8px) saturate(0.9);backdrop-filter:blur(8px) saturate(0.9)}[data-book="dsa"] .algostep--expanded::before{display:none}[data-book="dsa"] .algostep--expanded .algostep__caption,[data-book="dsa"] .algostep--expanded .algostep__mount{margin-inline:auto;flex-shrink:0;width:min(1100px,100%)}[data-book="dsa"] .algostep--expanded .algostep__caption{border:1px solid var(--color-border-subtle);border-bottom:none;border-radius:var(--radius-lg,12px) var(--radius-lg,12px) 0 0;background:color-mix(in srgb,var(--color-surface-2) 92%,transparent)}[data-book="dsa"] .algostep--expanded .algostep__mount{border:1px solid var(--color-border-subtle);border-top:none;border-radius:0 0 var(--radius-lg,12px) var(--radius-lg,12px);background:radial-gradient(ellipse at top,color-mix(in srgb,var(--color-accent) 8%,var(--color-surface-1)) 0%,var(--color-surface-1) 65%);box-shadow:0 24px 48px -12px rgba(0,0,0,0.5)}[data-book="dsa"] .algostep__progress{position:relative;display:flex;align-items:center;gap:var(--space-3);padding:0 var(--space-1)}[data-book="dsa"] .algostep__scrubber-track{position:absolute;inset:50% var(--space-1) auto;transform:translateY(-50%);height:6px;background:var(--color-surface-3);border-radius:var(--radius-pill);overflow:hidden;pointer-events:none}[data-book="dsa"] .algostep__scrubber-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent-400,var(--color-accent)),var(--color-accent));border-radius:var(--radius-pill);transition:width 380ms cubic-bezier(0.22,1,0.36,1)}[data-book="dsa"] .algostep__scrubber{appearance:none;-webkit-appearance:none;flex:1;height:18px;margin:0;background:transparent;cursor:pointer;position:relative;z-index:1}[data-book="dsa"] .algostep__scrubber::-webkit-slider-runnable-track{height:18px;background:transparent}[data-book="dsa"] .algostep__scrubber::-moz-range-track{height:18px;background:transparent}[data-book="dsa"] .algostep__scrubber::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:16px;height:16px;margin-top:1px;background:var(--color-accent);border:2px solid var(--color-surface-1);border-radius:50%;box-shadow:0 0 0 1px var(--color-accent);cursor:pointer;transition:transform var(--duration-fast) var(--ease-out-expo)}[data-book="dsa"] .algostep__scrubber::-moz-range-thumb{width:16px;height:16px;background:var(--color-accent);border:2px solid var(--color-surface-1);border-radius:50%;box-shadow:0 0 0 1px var(--color-accent);cursor:pointer}[data-book="dsa"] .algostep__scrubber:hover::-webkit-slider-thumb{transform:scale(1.15)}[data-book="dsa"] .algostep__scrubber:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 3px color-mix(in srgb,var(--color-accent) 35%,transparent)}@media (prefers-reduced-motion: reduce){[data-book="dsa"] .algostep__pointer,[data-book="dsa"] .algostep__cell,[data-book="dsa"] .algostep__chain-node,[data-book="dsa"] .algostep__frame,[data-book="dsa"] .algostep__matrix-cell,[data-book="dsa"] .algostep__merge-slice-cell,[data-book="dsa"] .algostep__scrubber-fill,[data-book="dsa"] .algostep__narration,[data-book="dsa"] .algostep__eyebrow::before,[data-book="dsa"] .algostep__btn,[data-book="dsa"] .algostep__btn--primary{transition:none !important;animation:none !important}}[data-book="dsa"] .algostep__stage-grid[data-variant="graph"],[data-book="dsa"] .algostep__stage-grid[data-variant="grid-board"],[data-book="dsa"] .algostep__stage-grid[data-variant="tree"],[data-book="dsa"] .algostep__stage-grid[data-variant="linkedlist"],[data-book="dsa"] .algostep__stage-grid[data-variant="backtracking"],[data-book="dsa"] .algostep__stage-grid[data-variant="stackqueue"],[data-book="dsa"] .algostep__stage-grid[data-variant="trie"],[data-book="dsa"] .algostep__stage-grid[data-variant="string"],[data-book="dsa"] .algostep__stage-grid[data-variant="dp-special"],[data-book="dsa"] .algostep__stage-grid[data-variant="intervals"]{display:flex;flex-direction:column;gap:var(--space-3);padding:var(--space-3) var(--space-4)}[data-book="dsa"] .algostep__graph-wrap{display:flex;justify-content:center;background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:8px;padding:var(--space-2)}[data-book="dsa"] .algostep__graph-svg{width:100%;max-width:560px;height:auto;aspect-ratio:3 / 2;color:var(--color-text-2)}[data-book="dsa"] .algostep__graph-edge line{stroke:var(--color-border-strong,var(--color-border-subtle));stroke-width:1.5;transition:stroke 200ms var(--ease-out-expo,ease),stroke-width 200ms}[data-book="dsa"] .algostep__graph-edge[data-state="candidate"] line{stroke:var(--color-accent);stroke-width:2;stroke-dasharray:4 3}[data-book="dsa"] .algostep__graph-edge[data-state="in-tree"] line{stroke:color-mix(in srgb,var(--color-accent) 92%,var(--color-text-1));stroke-width:2.6}[data-book="dsa"] .algostep__graph-edge[data-state="rejected"] line{stroke:color-mix(in srgb,var(--color-danger,#d23) 70%,var(--color-text-2));stroke-dasharray:2 3;opacity:0.6}[data-book="dsa"] .algostep__graph-edge[data-state="consumed"] line{stroke:color-mix(in srgb,var(--color-success,#009E73) 70%,var(--color-text-2));stroke-dasharray:1 4;opacity:0.45}[data-book="dsa"] .algostep__graph-edge-weight{font-size:11px;fill:var(--color-text-2);paint-order:stroke;stroke:var(--color-surface-1);stroke-width:3px;stroke-linejoin:round}[data-book="dsa"] .algostep__graph-node circle{fill:var(--color-surface-1);stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1.5;transition:fill 200ms,stroke 200ms}[data-book="dsa"] .algostep__graph-node text,[data-book="dsa"] .algostep__graph-node-label{font-size:12px;font-weight:600;fill:var(--color-text-1)}[data-book="dsa"] .algostep__graph-node[data-state="current"] circle{fill:color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-1));stroke:var(--color-accent);stroke-width:2.4}[data-book="dsa"] .algostep__graph-node[data-state="settled"] circle,[data-book="dsa"] .algostep__graph-node[data-state="black"] circle,[data-book="dsa"] .algostep__graph-node[data-state="in-mst"] circle{fill:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-1));stroke:color-mix(in srgb,var(--color-accent) 70%,var(--color-text-2))}[data-book="dsa"] .algostep__graph-node[data-state="gray"] circle{fill:color-mix(in srgb,var(--color-text-2) 18%,var(--color-surface-1));stroke:var(--color-text-2)}[data-book="dsa"] .algostep__graph-node[data-state="white"] circle{}[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-node[data-state="white"] circle{fill:color-mix(in srgb,#0072B2 10%,var(--color-surface-1));stroke:color-mix(in srgb,#0072B2 65%,var(--color-text-2));stroke-width:1.6}[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-node[data-state="gray"] circle{fill:color-mix(in srgb,#E69F00 22%,var(--color-surface-1));stroke:#E69F00;stroke-width:2}[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-node[data-state="black"] circle,[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-node[data-state="settled"] circle{fill:color-mix(in srgb,#009E73 22%,var(--color-surface-1));stroke:#009E73;stroke-width:2}[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-node[data-state="current"] circle{fill:color-mix(in srgb,#56B4E9 28%,var(--color-surface-1));stroke:#0072B2;stroke-width:2.6}[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-node text,[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-node-label{fill:var(--color-text-1);font-weight:700}[data-book="dsa"] .algostep__stage-grid[data-algo="union-find"] .algostep__graph-node[data-state="uf-root"] circle{fill:color-mix(in srgb,#009E73 22%,var(--color-surface-1));stroke:#009E73;stroke-width:2.4}[data-book="dsa"] .algostep__stage-grid[data-algo="union-find"] .algostep__graph-node[data-state="uf-path"] circle{fill:color-mix(in srgb,#E69F00 22%,var(--color-surface-1));stroke:#E69F00;stroke-width:2.4}[data-book="dsa"] .algostep__stage-grid[data-algo="union-find"] .algostep__graph-node[data-state="uf-root"][data-state-2="uf-path"] circle{stroke-dasharray:3 2}[data-book="dsa"] .algostep__stage-grid[data-algo="union-find"] .algostep__graph-node text,[data-book="dsa"] .algostep__stage-grid[data-algo="union-find"] .algostep__graph-node-label{font-weight:700}[data-book="dsa"] .algostep__graph-parent-edge line{stroke:color-mix(in srgb,var(--color-text-2) 60%,transparent);stroke-width:1.8;fill:none;transition:stroke 200ms var(--ease-out-expo,ease),stroke-width 200ms}[data-book="dsa"] .algostep__graph-parent-edge[data-state="on-path"] line{stroke:#E69F00;stroke-width:2.6}[data-book="dsa"] .algostep__graph-parent-edge[data-state="compressed"] line{stroke:#CC79A7;stroke-width:3;stroke-dasharray:6 3}[data-book="dsa"] .algostep__graph-parent-edge[data-state="cycle"] line{stroke:#D55E00;stroke-width:2.6;stroke-dasharray:4 3}[data-book="dsa"] .algostep__graph-parent-edge{color:color-mix(in srgb,var(--color-text-2) 60%,transparent)}[data-book="dsa"] .algostep__graph-parent-edge[data-state="on-path"]{color:#E69F00}[data-book="dsa"] .algostep__graph-parent-edge[data-state="compressed"]{color:#CC79A7}[data-book="dsa"] .algostep__graph-parent-edge[data-state="cycle"]{color:#D55E00}[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-edge[data-state="candidate"] line{stroke:#56B4E9;stroke-width:2.4;stroke-dasharray:4 3;opacity:1}[data-book="dsa"] .algostep__stage-grid[data-algo="topo"] .algostep__graph-edge[data-state="consumed"] line{stroke:color-mix(in srgb,#009E73 55%,var(--color-text-2));stroke-dasharray:1 5;opacity:0.55}[data-book="dsa"] .algostep__graph-node[data-state="stale"] circle{fill:color-mix(in srgb,var(--color-danger,#d23) 14%,var(--color-surface-1));stroke:var(--color-danger,#d23);stroke-width:2.6;stroke-dasharray:3 2;animation:algostep-stale-flash 600ms var(--ease-out-expo,ease) 1}@keyframes algostep-stale-flash{0%{stroke-width:1.5;opacity:0.55}40%{stroke-width:3.4;opacity:1}100%{stroke-width:2.6;opacity:1}}@media (prefers-reduced-motion: reduce){[data-book="dsa"] .algostep__graph-node[data-state="stale"] circle{animation:none}}[data-book="dsa"] .algostep__graph-banner{display:flex;align-items:center;gap:var(--space-2);padding:6px 10px;border:1px solid color-mix(in srgb,var(--color-danger,#d23) 50%,var(--color-border-subtle));border-left-width:3px;background:color-mix(in srgb,var(--color-danger,#d23) 8%,var(--color-surface-1));border-radius:4px;font-size:0.8125rem}[data-book="dsa"] .algostep__graph-banner-tag{display:inline-block;padding:1px 8px;border-radius:999px;background:var(--color-danger,#d23);color:var(--color-surface-1);font-size:0.6875rem;font-weight:700;letter-spacing:0.06em}[data-book="dsa"] .algostep__graph-banner-text{color:var(--color-text-1);font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__graph-banner[data-kind="success"]{border-color:color-mix(in srgb,#009E73 55%,var(--color-border-subtle));background:color-mix(in srgb,#009E73 10%,var(--color-surface-1))}[data-book="dsa"] .algostep__graph-banner[data-kind="success"] .algostep__graph-banner-tag{background:#009E73}[data-book="dsa"] .algostep__graph-side{display:flex;flex-direction:column;gap:var(--space-2)}[data-book="dsa"] .algostep__graph-row{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-2);font-size:0.875rem}[data-book="dsa"] .algostep__graph-row-label{min-width:56px;font-weight:600;color:var(--color-text-2);font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__graph-row-cells{display:flex;gap:4px;flex-wrap:wrap}[data-book="dsa"] .algostep__graph-row-cell{display:inline-flex;flex-direction:column;align-items:center;min-width:36px;padding:2px 6px;border:1px solid var(--color-border-subtle);border-radius:4px;background:var(--color-surface-1);font-variant-numeric:tabular-nums;font-size:0.8125rem}[data-book="dsa"] .algostep__graph-row-cell[data-state="settled"]{background:color-mix(in srgb,var(--color-accent) 12%,var(--color-surface-1));border-color:color-mix(in srgb,var(--color-accent) 60%,var(--color-border-subtle))}[data-book="dsa"] .algostep__graph-row-cell[data-state="zero"]{background:color-mix(in srgb,var(--color-success,#009E73) 14%,var(--color-surface-1));border-color:color-mix(in srgb,var(--color-success,#009E73) 65%,var(--color-border-subtle))}[data-book="dsa"] .algostep__graph-row-cell[data-state="zero"] .algostep__graph-row-val{color:var(--color-success,#009E73)}[data-book="dsa"] .algostep__graph-row-key{font-size:0.6875rem;color:var(--color-text-2);letter-spacing:0.04em}[data-book="dsa"] .algostep__graph-row-val{font-weight:600;color:var(--color-text-1)}[data-book="dsa"] .algostep__graph-row-list{display:inline-flex;gap:4px;flex-wrap:wrap}[data-book="dsa"] .algostep__graph-row-pill{padding:1px 8px;border:1px solid var(--color-border-subtle);border-radius:999px;background:var(--color-surface-1);font-size:0.75rem;font-variant-numeric:tabular-nums;color:var(--color-text-1)}[data-book="dsa"] .algostep__graph-row-empty{color:var(--color-text-2);font-style:italic;font-size:0.8125rem}[data-book="dsa"] .algostep__graph-row-badge{display:inline-block;padding:2px 10px;background:var(--color-accent);color:var(--color-on-accent,var(--color-surface-1));border-radius:999px;font-size:0.75rem;font-weight:600}[data-book="dsa"] .algostep__grid-wrap{display:grid;grid-template-columns:repeat(var(--grid-cols,4),minmax(36px,1fr));gap:2px;background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:6px;padding:4px;max-width:min(100%,calc(var(--grid-cols,4) * 56px));margin:0 auto}[data-book="dsa"] .algostep__grid-board{display:inline-flex;flex-direction:column;margin:0 auto;align-items:stretch}[data-book="dsa"] .algostep__grid-headers-top{display:grid;grid-template-columns:28px repeat(var(--grid-cols,4),minmax(36px,1fr));gap:2px;padding:0 4px 2px}[data-book="dsa"] .algostep__grid-body{display:grid;grid-template-columns:28px auto;gap:2px}[data-book="dsa"] .algostep__grid-headers-left{display:grid;grid-template-rows:repeat(var(--grid-rows,4),1fr);gap:2px;padding:4px 0}[data-book="dsa"] .algostep__grid-header{display:flex;align-items:center;justify-content:center;font-family:var(--font-mono,monospace);font-size:0.8125rem;font-weight:700;color:var(--color-text-2);text-transform:lowercase}[data-book="dsa"] .algostep__grid-header[data-empty="true"]{color:color-mix(in srgb,var(--color-text-2) 50%,transparent);font-style:italic}[data-book="dsa"] .algostep__grid-header[data-empty="true"]::before{content:"ε";font-style:normal}[data-book="dsa"] .algostep__grid-corner{width:28px}[data-book="dsa"] .algostep__grid-cell{display:flex;align-items:center;justify-content:center;aspect-ratio:1 / 1;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:4px;font-variant-numeric:tabular-nums;font-size:0.875rem;font-weight:500;color:var(--color-text-1);position:relative;transition:background 200ms,border-color 200ms,transform 200ms}[data-book="dsa"] .algostep__grid-cell-value{display:inline-flex;align-items:center;justify-content:center}[data-book="dsa"] .algostep__grid-cell-depth{position:absolute;bottom:1px;right:3px;font-size:0.625rem;font-weight:700;font-variant-numeric:tabular-nums;color:color-mix(in srgb,var(--color-text-1) 70%,transparent);line-height:1;pointer-events:none}[data-book="dsa"] .algostep__grid-cell[data-fixed="true"]{background:color-mix(in srgb,var(--color-text-2) 8%,var(--color-surface-1));font-weight:700}[data-book="dsa"] .algostep__grid-cell[data-state="queen"]{background:color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-1));border-color:var(--color-accent);color:var(--color-accent);font-size:1.1rem}[data-book="dsa"] .algostep__grid-cell[data-state="placed"],[data-book="dsa"] .algostep__grid-cell[data-state="updated"]{background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-1));border-color:color-mix(in srgb,var(--color-accent) 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__grid-cell[data-state="fresh"]{background:color-mix(in srgb,#f5a623 18%,var(--color-surface-1))}[data-book="dsa"] .algostep__grid-cell[data-state="rotting"]{background:color-mix(in srgb,var(--color-danger,#d23) 22%,var(--color-surface-1))}[data-book="dsa"] .algostep__grid-cell[data-state="empty"]{background:color-mix(in srgb,var(--color-text-2) 4%,var(--color-surface-1))}[data-book="dsa"] .algostep__grid-cell[data-state="captured"]{background:color-mix(in srgb,#D55E00 22%,var(--color-surface-1));color:#D55E00;font-weight:700}[data-book="dsa"] .algostep__grid-cell[data-state="visited"]{background:color-mix(in srgb,#0072B2 16%,var(--color-surface-1));color:#0072B2;font-weight:700}[data-book="dsa"] .algostep__grid-cell[data-state="safe"]{background:color-mix(in srgb,#009E73 14%,var(--color-surface-1));color:#009E73;font-weight:700}[data-book="dsa"] .algostep__grid-cell[data-emphasis="skip"]{outline:2px dotted color-mix(in srgb,var(--color-text-2) 60%,transparent);outline-offset:-1px}[data-book="dsa"] .algostep__grid-stack{display:inline-flex;flex-direction:column;gap:6px;padding:10px 12px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:8px;font-size:0.8125rem;font-variant-numeric:tabular-nums;align-self:flex-start;margin-left:var(--space-3);min-width:110px;vertical-align:top}[data-book="dsa"] .algostep__grid-stack-head{font-size:0.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:0.04em;color:var(--color-text-2)}[data-book="dsa"] .algostep__grid-stack-list{display:flex;flex-direction:column;gap:2px}[data-book="dsa"] .algostep__grid-stack-item{padding:3px 8px;border-radius:4px;background:color-mix(in srgb,var(--color-text-2) 6%,transparent)}[data-book="dsa"] .algostep__grid-stack-item[data-top="true"]{background:color-mix(in srgb,var(--color-accent) 18%,transparent);color:var(--color-accent);font-weight:700}[data-book="dsa"] .algostep__grid-stack-empty{padding:3px 8px;color:var(--color-text-2);font-style:italic}[data-book="dsa"] .algostep__stage-grid[data-grid-mode="matrix"]{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:center}[data-book="dsa"] .algostep__grid-cell[data-state="final"]{background:color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-1));border-color:var(--color-accent)}[data-book="dsa"] .algostep__grid-cell[data-emphasis="active"]{outline:2px solid var(--color-accent);outline-offset:-1px;z-index:1}[data-book="dsa"] .algostep__grid-cell[data-emphasis="frontier"]{outline:2px dashed color-mix(in srgb,var(--color-accent) 70%,var(--color-text-2));outline-offset:-1px}[data-book="dsa"] .algostep__grid-cell[data-emphasis="rejected"]{outline:2px dashed var(--color-danger,#d23);outline-offset:-1px}[data-book="dsa"] .algostep__grid-cell[data-attack-cols="true"]{background-color:color-mix(in srgb,#D55E00 10%,var(--color-surface-1))}[data-book="dsa"] .algostep__grid-cell[data-attack-diag1="true"]{background-image:repeating-linear-gradient(135deg,transparent 0 4px,color-mix(in srgb,#E69F00 32%,transparent) 4px 6px)}[data-book="dsa"] .algostep__grid-cell[data-attack-diag2="true"]{background-image:repeating-linear-gradient(45deg,transparent 0 4px,color-mix(in srgb,#CC79A7 32%,transparent) 4px 6px)}[data-book="dsa"] .algostep__grid-cell[data-attack-diag1="true"][data-attack-diag2="true"]{background-image:repeating-linear-gradient(135deg,transparent 0 4px,color-mix(in srgb,#E69F00 32%,transparent) 4px 6px),repeating-linear-gradient(45deg,transparent 0 4px,color-mix(in srgb,#CC79A7 32%,transparent) 4px 6px)}[data-book="dsa"] .algostep__grid-cell[data-emphasis="source"]{outline:2px dashed color-mix(in srgb,var(--color-accent) 60%,var(--color-text-2));outline-offset:-1px;background:color-mix(in srgb,var(--color-accent) 6%,var(--color-surface-1))}[data-book="dsa"] .algostep__grid-cell[data-op="match"]{background:color-mix(in srgb,#009E73 14%,var(--color-surface-1));border-color:color-mix(in srgb,#009E73 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__grid-cell[data-op="replace"]{background:color-mix(in srgb,#E69F00 16%,var(--color-surface-1));border-color:color-mix(in srgb,#E69F00 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__grid-cell[data-op="delete"]{background:color-mix(in srgb,#D55E00 14%,var(--color-surface-1));border-color:color-mix(in srgb,#D55E00 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__grid-cell[data-op="insert"]{background:color-mix(in srgb,#56B4E9 16%,var(--color-surface-1));border-color:color-mix(in srgb,#56B4E9 55%,var(--color-border-subtle))}[data-book="dsa"] .algostep__grid-cell[data-emphasis="predecessor"]{outline:2px dashed color-mix(in srgb,#CC79A7 70%,transparent);outline-offset:-1px}[data-book="dsa"] .algostep__grid-cell[data-path="true"]{outline:2px solid color-mix(in srgb,#0072B2 65%,transparent);outline-offset:-1px;z-index:1}[data-book="dsa"] .algostep__grid-badge[data-kind="recovered"]{background:color-mix(in srgb,#009E73 14%,var(--color-surface-1));border-color:color-mix(in srgb,#009E73 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__grid-badge[data-kind="recovered"] .algostep__grid-badge-val{font-weight:700;letter-spacing:0.06em}[data-book="dsa"] .algostep__grid-cell[data-dead="true"]{opacity:0.35;filter:grayscale(0.6)}[data-book="dsa"] .algostep__grid-rolling{display:inline-flex;flex-direction:column;gap:4px;padding:6px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:8px}[data-book="dsa"] .algostep__grid-rolling-label{font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--color-text-2);font-weight:700}[data-book="dsa"] .algostep__grid-rolling-cells{display:inline-flex;gap:6px}[data-book="dsa"] .algostep__grid-rolling-cell{display:inline-flex;flex-direction:column;align-items:center;min-width:44px;padding:4px 8px;background:color-mix(in srgb,#56B4E9 10%,var(--color-surface-1));border:1px solid color-mix(in srgb,#56B4E9 45%,var(--color-border-subtle));border-radius:6px;font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__grid-rolling-cell-key{font-size:0.625rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--color-text-2);font-weight:600}[data-book="dsa"] .algostep__grid-rolling-cell-val{font-size:1rem;font-weight:700;color:var(--color-text-1);font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__rectree{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(0,1fr) minmax(0,1fr);gap:12px;align-items:start;width:100%}[data-book="dsa"] .algostep__rectree-tree,[data-book="dsa"] .algostep__rectree-seq,[data-book="dsa"] .algostep__rectree-memo{display:flex;flex-direction:column;gap:8px;padding:10px 12px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:10px;min-width:0}[data-book="dsa"] .algostep__rectree-col-label{font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--color-text-2);font-weight:700}[data-book="dsa"] .algostep__rectree-tree-body{display:flex;flex-direction:column;gap:6px;min-height:120px}[data-book="dsa"] .algostep__rectree-row{display:flex;flex-wrap:wrap;gap:6px;align-items:center}[data-book="dsa"] .algostep__rectree-node{display:inline-flex;align-items:baseline;gap:4px;padding:3px 8px;font-family:var(--font-mono,monospace);font-size:0.8125rem;border-radius:6px;border:1px solid var(--color-border-subtle);background:var(--color-surface-1);color:var(--color-text-1)}[data-book="dsa"] .algostep__rectree-node[data-status="entered"]{background:color-mix(in srgb,#56B4E9 12%,var(--color-surface-1));border-color:color-mix(in srgb,#56B4E9 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__rectree-node[data-status="hit"]{background:color-mix(in srgb,#E69F00 18%,var(--color-surface-1));border-color:color-mix(in srgb,#E69F00 60%,var(--color-border-subtle))}[data-book="dsa"] .algostep__rectree-node[data-status="written"]{background:color-mix(in srgb,#009E73 16%,var(--color-surface-1));border-color:color-mix(in srgb,#009E73 55%,var(--color-border-subtle))}[data-book="dsa"] .algostep__rectree-node[data-active="true"]{outline:2px solid #CC79A7;outline-offset:1px}[data-book="dsa"] .algostep__rectree-node-k{font-weight:700}[data-book="dsa"] .algostep__rectree-node-v{font-weight:600;color:var(--color-text-2);font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__rectree-seq-body{list-style:decimal inside;margin:0;padding:0;display:flex;flex-direction:column;gap:2px;font-family:var(--font-mono,monospace);font-size:0.8125rem;color:var(--color-text-1)}[data-book="dsa"] .algostep__rectree-seq-item{padding:2px 6px;border-radius:4px;border:1px solid transparent}[data-book="dsa"] .algostep__rectree-seq-item[data-status="entered"]{color:color-mix(in srgb,#56B4E9 70%,var(--color-text-1))}[data-book="dsa"] .algostep__rectree-seq-item[data-status="hit"]{background:color-mix(in srgb,#E69F00 10%,transparent);color:color-mix(in srgb,#E69F00 60%,var(--color-text-1))}[data-book="dsa"] .algostep__rectree-seq-item[data-status="written"]{background:color-mix(in srgb,#009E73 10%,transparent);color:color-mix(in srgb,#009E73 65%,var(--color-text-1))}[data-book="dsa"] .algostep__rectree-seq-item[data-active="true"]{border-color:#CC79A7}[data-book="dsa"] .algostep__rectree-memo-body{display:flex;flex-direction:column;gap:3px;font-family:var(--font-mono,monospace);font-size:0.8125rem}[data-book="dsa"] .algostep__rectree-memo-row{display:flex;justify-content:space-between;gap:8px;padding:3px 8px;border-radius:4px;border:1px solid var(--color-border-subtle);background:var(--color-surface-1);color:var(--color-text-1)}[data-book="dsa"] .algostep__rectree-memo-row[data-base="true"]{color:var(--color-text-2);font-style:italic}[data-book="dsa"] .algostep__rectree-memo-row[data-added="true"]{background:color-mix(in srgb,#009E73 14%,var(--color-surface-1));border-color:color-mix(in srgb,#009E73 55%,var(--color-border-subtle));font-weight:600}[data-book="dsa"] .algostep__rectree-memo-k{font-weight:700}[data-book="dsa"] .algostep__rectree-memo-v{font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__grid-coins{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px}[data-book="dsa"] .algostep__grid-coins-label{font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--color-text-2);font-weight:700}[data-book="dsa"] .algostep__grid-coin{display:inline-flex;align-items:center;justify-content:center;min-width:26px;min-height:26px;padding:2px 6px;background:color-mix(in srgb,var(--color-text-2) 8%,var(--color-surface-1));border:1px solid var(--color-border-subtle);border-radius:999px;font-family:var(--font-mono,monospace);font-size:0.8125rem;font-weight:700}[data-book="dsa"] .algostep__grid-coin[data-state="active"]{background:color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-1));border-color:var(--color-accent);color:var(--color-accent)}[data-book="dsa"] .algostep__grid-ribbon{display:inline-flex;align-items:center;padding:4px 12px;background:var(--color-surface-1);border:1px dashed color-mix(in srgb,var(--color-text-2) 30%,transparent);border-radius:999px;font-family:var(--font-mono,monospace);font-size:0.8125rem;color:var(--color-text-1)}[data-book="dsa"] .algostep__grid-ribbon[data-state="updated"]{border-color:#2c8;background:color-mix(in srgb,#2c8 8%,var(--color-surface-1));color:var(--color-text-1)}[data-book="dsa"] .algostep__grid-sweep{display:inline-flex;align-items:center;gap:8px;padding:4px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__grid-sweep-label{font-size:0.625rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--color-text-2);font-weight:700}[data-book="dsa"] .algostep__grid-sweep-arrow{font-size:0.8125rem;font-weight:600;color:var(--color-text-1)}[data-book="dsa"] .algostep__grid-sweep[data-direction="ltr"]{border-color:color-mix(in srgb,#56B4E9 50%,var(--color-border-subtle));background:color-mix(in srgb,#56B4E9 10%,var(--color-surface-1))}[data-book="dsa"] .algostep__grid-sweep[data-direction="rtl"]{border-color:color-mix(in srgb,#E69F00 50%,var(--color-border-subtle));background:color-mix(in srgb,#E69F00 10%,var(--color-surface-1))}[data-book="dsa"] .algostep__stage-grid[data-sub-variant="sudoku"] .algostep__grid-wrap{gap:1px;background:color-mix(in srgb,var(--color-text-1) 18%,transparent);padding:2px;border:1px solid color-mix(in srgb,var(--color-text-1) 28%,transparent)}[data-book="dsa"] .algostep__stage-grid[data-sub-variant="sudoku"] .algostep__grid-cell{border-radius:0;border:0;min-height:48px}[data-book="dsa"] .algostep__stage-grid[data-sub-variant="sudoku"] .algostep__grid-cell[data-box-top="true"]{margin-top:1px;box-shadow:0 -1px 0 0 color-mix(in srgb,var(--color-text-1) 35%,transparent)}[data-book="dsa"] .algostep__stage-grid[data-sub-variant="sudoku"] .algostep__grid-cell[data-box-left="true"]{margin-left:1px;box-shadow:-1px 0 0 0 color-mix(in srgb,var(--color-text-1) 35%,transparent)}[data-book="dsa"] .algostep__stage-grid[data-sub-variant="sudoku"] .algostep__grid-cell[data-box-top="true"][data-box-left="true"]{box-shadow:-1px 0 0 0 color-mix(in srgb,var(--color-text-1) 35%,transparent),0 -1px 0 0 color-mix(in srgb,var(--color-text-1) 35%,transparent)}[data-book="dsa"] .algostep__stage-grid[data-sub-variant="sudoku"] .algostep__grid-cell[data-fixed="true"]{background:color-mix(in srgb,var(--color-text-1) 5%,var(--color-surface-1));font-weight:700;color:var(--color-text-1)}[data-book="dsa"] .algostep__stage-grid[data-sub-variant="sudoku"] .algostep__grid-cell[data-state="placed"]{color:var(--color-accent);font-weight:700;background:color-mix(in srgb,var(--color-accent) 8%,var(--color-surface-1))}[data-book="dsa"] .algostep__stage-grid[data-sub-variant="sudoku"] .algostep__grid-cell[data-state="forced"]{color:#009E73;font-weight:700;background:color-mix(in srgb,#009E73 8%,var(--color-surface-1))}[data-book="dsa"] .algostep__grid-side{display:flex;flex-wrap:wrap;gap:var(--space-2)}[data-book="dsa"] .algostep__grid-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem;font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__grid-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__grid-badge-val{color:var(--color-text-1);font-weight:600}[data-book="dsa"] .algostep__grid-badge[data-mask="cols"]{box-shadow:inset 6px 0 0 #D55E00;padding-left:14px}[data-book="dsa"] .algostep__grid-badge[data-mask="diag1"]{box-shadow:inset 6px 0 0 #E69F00;padding-left:14px}[data-book="dsa"] .algostep__grid-badge[data-mask="diag2"]{box-shadow:inset 6px 0 0 #CC79A7;padding-left:14px}[data-book="dsa"] .algostep__tree-wrap{display:flex;justify-content:center;background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:8px;padding:var(--space-2)}[data-book="dsa"] .algostep__tree-svg{width:100%;max-width:560px;height:auto;aspect-ratio:15 / 7;color:var(--color-text-2)}[data-book="dsa"] .algostep__tree-edge{stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1.5;fill:none}[data-book="dsa"] .algostep__tree-node circle{fill:var(--color-surface-1);stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1.5;transition:fill 200ms,stroke 200ms}[data-book="dsa"] .algostep__tree-node text{font-size:12px;font-weight:600;fill:var(--color-text-1)}[data-book="dsa"] .algostep__tree-node[data-state="current"] circle,[data-book="dsa"] .algostep__tree-node[data-state="active"] circle{fill:color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-1));stroke:var(--color-accent);stroke-width:2.4}[data-book="dsa"] .algostep__tree-node[data-state="parent"] circle{fill:color-mix(in srgb,var(--color-text-2) 16%,var(--color-surface-1));stroke-dasharray:3 2}[data-book="dsa"] .algostep__tree-node[data-state="compare"] circle{fill:color-mix(in srgb,var(--color-accent) 12%,var(--color-surface-1));stroke:color-mix(in srgb,var(--color-accent) 60%,var(--color-text-2))}[data-book="dsa"] .algostep__tree-node[data-state="visited"] circle{fill:color-mix(in srgb,#2c8 16%,var(--color-surface-1));stroke:#2c8;stroke-width:1.8}[data-book="dsa"] .algostep__tree-node[data-state="path"] circle{fill:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-1));stroke:color-mix(in srgb,var(--color-accent) 70%,var(--color-text-2));stroke-width:1.6}[data-book="dsa"] .algostep__tree-node[data-state="successor"] circle{fill:color-mix(in srgb,#2c8 28%,var(--color-surface-1));stroke:#2c8;stroke-width:2.4;stroke-dasharray:4 2}[data-book="dsa"] .algostep__tree-node[data-state="victim"] circle{fill:color-mix(in srgb,var(--color-danger,#d23) 22%,var(--color-surface-1));stroke:var(--color-danger,#d23);stroke-width:2.4}[data-book="dsa"] .algostep__tree-node[data-state="victim"] text{text-decoration:line-through}[data-book="dsa"] .algostep__tree-thread{stroke:var(--color-accent);stroke-width:1.8;stroke-dasharray:4 3;color:var(--color-accent);opacity:0.85}[data-book="dsa"] .algostep__tree-segtree-node circle{fill:var(--color-surface-1);stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1.4;transition:fill 180ms,stroke 180ms}[data-book="dsa"] .algostep__tree-segtree-node text{font-size:12px;font-weight:600;fill:var(--color-text-1)}[data-book="dsa"] .algostep__tree-segtree-range{font-size:10px;font-weight:400;fill:var(--color-text-2)}[data-book="dsa"] .algostep__tree-segtree-node[data-state="filled"] circle{fill:color-mix(in srgb,#0072B2 12%,var(--color-surface-1));stroke:#0072B2}[data-book="dsa"] .algostep__tree-segtree-node[data-state="active"] circle{fill:color-mix(in srgb,#E69F00 26%,var(--color-surface-1));stroke:#E69F00;stroke-width:2.4}[data-book="dsa"] .algostep__tree-segtree-node[data-state="hit"] circle{fill:color-mix(in srgb,#009E73 26%,var(--color-surface-1));stroke:#009E73;stroke-width:2.4}[data-book="dsa"] .algostep__tree-segtree-node[data-state="empty"] circle{fill:color-mix(in srgb,#F0E442 30%,var(--color-surface-1));stroke:color-mix(in srgb,#F0E442 70%,var(--color-text-2));stroke-dasharray:3 2}[data-book="dsa"] .algostep__tree-segtree-node[data-state="update"] circle{fill:color-mix(in srgb,#D55E00 24%,var(--color-surface-1));stroke:#D55E00;stroke-width:2.2}[data-book="dsa"] .algostep__tree-array-cell[data-state="write"]{background:color-mix(in srgb,#D55E00 18%,var(--color-surface-1));border-color:#D55E00}[data-book="dsa"] .algostep__tree-stack-column{display:flex;flex-direction:column;gap:6px;min-width:140px}[data-book="dsa"] .algostep__tree-stack-label{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.05em}[data-book="dsa"] .algostep__tree-stack-frames{display:flex;flex-direction:column;gap:2px;padding:6px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:6px;min-height:40px}[data-book="dsa"] .algostep__tree-stack-frame{font-family:var(--font-mono,monospace);font-size:0.8125rem;padding:4px 8px;background:color-mix(in srgb,var(--color-text-2) 6%,transparent);border:1px solid color-mix(in srgb,var(--color-text-2) 14%,transparent);border-radius:4px}[data-book="dsa"] .algostep__tree-stack-frame[data-state="top"]{background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-1));border-color:var(--color-accent);font-weight:700}[data-book="dsa"] .algostep__tree-stack-frame-fn{color:var(--color-text-2)}[data-book="dsa"] .algostep__tree-stack-frame-arg{color:var(--color-text-1);font-weight:700}[data-book="dsa"] .algostep__tree-stack-empty{color:var(--color-text-2);font-style:italic;font-size:0.8125rem;padding:4px 8px}[data-book="dsa"] .algostep__tree-array{display:flex;gap:2px;flex-wrap:wrap}[data-book="dsa"] .algostep__tree-array-cell{display:inline-flex;flex-direction:column;align-items:center;min-width:32px;padding:2px 4px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:4px;font-variant-numeric:tabular-nums;font-size:0.8125rem}[data-book="dsa"] .algostep__tree-array-cell[data-state="active"]{background:color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-1));border-color:var(--color-accent)}[data-book="dsa"] .algostep__tree-array-cell[data-state="compare"]{background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-1));border-color:color-mix(in srgb,var(--color-accent) 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__tree-array-cell[data-emphasis="parent"]{outline:2px dashed var(--color-text-2);outline-offset:-1px}[data-book="dsa"] .algostep__tree-array-cell[data-state="empty"]{color:var(--color-text-2);font-style:italic;border-style:dashed;background:transparent}[data-book="dsa"] .algostep__tree-edge-label{font-size:10px;font-weight:700;fill:var(--color-text-2);font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__tree-edge[data-state="active"]{stroke:var(--color-accent);stroke-width:2.6}[data-book="dsa"] .algostep__tree-node[data-kind="leaf"] circle{fill:color-mix(in srgb,var(--color-surface-2) 60%,var(--color-surface-1))}[data-book="dsa"] .algostep__tree-code-table{display:flex;flex-direction:column;gap:4px;min-width:140px}[data-book="dsa"] .algostep__tree-code-label{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.05em}[data-book="dsa"] .algostep__tree-code-rows{display:flex;flex-direction:column;gap:2px;padding:6px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:6px}[data-book="dsa"] .algostep__tree-code-row{display:grid;grid-template-columns:1.5rem 1fr;gap:8px;align-items:baseline;padding:2px 6px;border-radius:4px;font-family:var(--font-mono,monospace);font-size:0.8125rem}[data-book="dsa"] .algostep__tree-code-row[data-state="active"]{background:color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-1))}[data-book="dsa"] .algostep__tree-code-char{color:var(--color-text-2);font-weight:700}[data-book="dsa"] .algostep__tree-code-bits{color:var(--color-text-1);font-weight:700;font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__tree-side{display:flex;flex-wrap:wrap;gap:var(--space-3);align-items:flex-start}[data-book="dsa"] .algostep__tree-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem;align-self:flex-start;width:max-content;flex:0 0 auto}[data-book="dsa"] .algostep__tree-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__tree-badge-val{color:var(--color-text-1);font-weight:600;font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__tree-list-row{display:flex;align-items:center;gap:var(--space-2);flex-wrap:wrap;font-size:0.875rem}[data-book="dsa"] .algostep__tree-list-label{min-width:80px;font-weight:600;color:var(--color-text-2);font-size:0.75rem;letter-spacing:0.04em;text-transform:uppercase}[data-book="dsa"] .algostep__tree-list-items{display:flex;gap:4px;flex-wrap:wrap}[data-book="dsa"] .algostep__tree-list-pill{padding:1px 8px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-variant-numeric:tabular-nums;font-size:0.75rem;color:var(--color-text-1)}[data-book="dsa"] .algostep__tree-list-empty{color:var(--color-text-2);font-style:italic;font-size:0.8125rem}[data-book="dsa"] .algostep__tree-queue-column{display:flex;flex-direction:column;gap:var(--space-2);margin-top:var(--space-2)}[data-book="dsa"] .algostep__tree-queue-label{font-weight:600;color:var(--color-text-2);font-size:0.6875rem;letter-spacing:0.04em;text-transform:uppercase}[data-book="dsa"] .algostep__tree-queue-items{display:flex;align-items:center;gap:4px;flex-wrap:wrap;padding:4px;background:color-mix(in srgb,var(--color-surface-2) 30%,transparent);border:1px solid var(--color-border-subtle);border-radius:6px;min-height:32px}[data-book="dsa"] .algostep__tree-queue-cell{padding:2px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-strong,var(--color-text-2));border-radius:4px;font-variant-numeric:tabular-nums;font-size:0.8125rem;font-weight:600;color:var(--color-text-1)}[data-book="dsa"] .algostep__tree-queue-cell[data-state="head"]{background:color-mix(in srgb,var(--color-accent) 20%,var(--color-surface-1));border-color:var(--color-accent)}[data-book="dsa"] .algostep__tree-queue-empty{color:var(--color-text-2);font-style:italic;font-size:0.75rem;padding:0 6px}[data-book="dsa"] .algostep__tree-queue-boundary{display:inline-block;width:2px;height:24px;margin:0 4px;background:repeating-linear-gradient(to bottom,var(--color-accent) 0,var(--color-accent) 4px,transparent 4px,transparent 7px);border-radius:1px}[data-book="dsa"] .algostep__tree-list-nested{display:flex;flex-direction:column;gap:4px}[data-book="dsa"] .algostep__tree-list-nested .algostep__tree-list-items[data-role="level"]{align-items:center}[data-book="dsa"] .algostep__tree-list-row-tag{font-size:0.6875rem;color:var(--color-text-2);font-weight:700;letter-spacing:0.04em;margin-right:4px;font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__list-row{display:flex;align-items:center;gap:4px;flex-wrap:wrap;background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:8px;padding:var(--space-3);overflow-x:auto}[data-book="dsa"] .algostep__list-node{display:inline-flex;flex-direction:column;align-items:center;min-width:44px;padding:4px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-strong,var(--color-text-2));border-radius:6px;font-variant-numeric:tabular-nums;font-size:0.875rem;font-weight:600;transition:background 200ms,border-color 200ms}[data-book="dsa"] .algostep__list-node-value{color:var(--color-text-1)}[data-book="dsa"] .algostep__list-node-index{color:var(--color-text-2);font-size:0.6875rem}[data-book="dsa"] .algostep__list-node[data-state="slow"]{background:color-mix(in srgb,#2c8 22%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__list-node[data-state="fast"]{background:color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-1));border-color:var(--color-accent)}[data-book="dsa"] .algostep__list-node[data-state="meet"]{background:color-mix(in srgb,var(--color-accent) 35%,var(--color-surface-1));border-color:var(--color-accent);outline:2px solid var(--color-accent);outline-offset:2px}[data-book="dsa"] .algostep__list-node[data-state="mru"]{background:color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-1));border-color:var(--color-accent)}[data-book="dsa"] .algostep__list-node[data-state="lru"]{background:color-mix(in srgb,var(--color-text-2) 14%,var(--color-surface-1));border-color:var(--color-text-2)}[data-book="dsa"] .algostep__list-node[data-state="evicted"]{background:color-mix(in srgb,var(--color-danger,#d23) 22%,var(--color-surface-1));border-color:var(--color-danger,#d23);text-decoration:line-through;opacity:0.7}[data-book="dsa"] .algostep__list-node[data-state="active"]{outline:2px solid var(--color-accent);outline-offset:2px}[data-book="dsa"] .algostep__list-node[data-emphasis="cycle-entry"]{border-style:dashed;border-width:2px;border-color:var(--color-success,#009E73);box-shadow:0 0 0 3px color-mix(in srgb,#009E73 18%,transparent)}[data-book="dsa"] .algostep__list-arrow{color:var(--color-text-2);font-family:var(--font-mono,monospace);font-size:0.875rem;user-select:none}[data-book="dsa"] .algostep__list-sentinel{display:inline-flex;padding:4px 10px;background:color-mix(in srgb,var(--color-text-2) 8%,var(--color-surface-1));border:1px dashed var(--color-text-2);border-radius:6px;color:var(--color-text-2);font-family:var(--font-mono,monospace);font-size:0.75rem}[data-book="dsa"] .algostep__list-cycle-note{color:var(--color-text-2);font-style:italic;font-size:0.8125rem;margin-left:var(--space-2)}[data-book="dsa"] .algostep__list-pointer-row{display:flex;flex-wrap:wrap;gap:var(--space-2);align-items:center}[data-book="dsa"] .algostep__list-pointer{display:inline-flex;align-items:center;gap:6px;padding:2px 10px;background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-1));border:1px solid color-mix(in srgb,var(--color-accent) 40%,var(--color-border-subtle));border-radius:999px;font-size:0.75rem;font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__list-pointer-label{font-weight:700;color:var(--color-accent)}[data-book="dsa"] .algostep__list-pointer-target{color:var(--color-text-1)}[data-book="dsa"] .algostep__list-side{display:flex;flex-wrap:wrap;gap:var(--space-2);align-items:center}[data-book="dsa"] .algostep__list-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem}[data-book="dsa"] .algostep__list-badge[data-kind="success"]{background:color-mix(in srgb,#2c8 18%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__list-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__list-badge-val{color:var(--color-text-1);font-weight:600;font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__list-map{display:flex;flex-direction:column;gap:4px;padding:var(--space-2);border:1px solid var(--color-border-subtle);border-radius:6px;background:var(--color-surface-1);font-size:0.8125rem;font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__list-map-label{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__list-wrap{position:relative;width:100%;background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:8px;padding:36px 16px 24px;margin:0 auto;overflow:visible}[data-book="dsa"] .algostep__list-svg{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;color:color-mix(in srgb,var(--color-text-2) 60%,transparent);z-index:0}[data-book="dsa"] .algostep__list-link{stroke:currentColor;stroke-width:1.5;fill:none;transition:stroke-width 200ms,color 200ms}[data-book="dsa"] .algostep__list-link[data-state="active"]{stroke-width:2.5;color:var(--color-accent)}[data-book="dsa"] .algostep__list-link--cycle{color:color-mix(in srgb,var(--color-accent) 70%,var(--color-text-2));stroke-dasharray:4 3}[data-book="dsa"] .algostep__list-cells{position:relative;z-index:1;display:flex;align-items:center;justify-content:center;gap:28px;flex-wrap:nowrap;min-height:56px}[data-book="dsa"] .algostep__list-wrap .algostep__list-node{background:var(--color-surface-1);border:1.5px solid color-mix(in srgb,var(--color-text-1) 30%,transparent);min-width:48px;min-height:48px;padding:6px 12px;border-radius:8px;font-weight:600;font-size:1rem;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;transition:background 200ms,border-color 200ms,transform 200ms}[data-book="dsa"] .algostep__list-wrap .algostep__list-node[data-sentinel="true"]{background:color-mix(in srgb,var(--color-text-2) 8%,var(--color-surface-1));border-style:dashed;border-color:var(--color-text-2);color:var(--color-text-2);font-size:0.75rem;font-family:var(--font-mono,monospace);font-weight:500}[data-book="dsa"] .algostep__list-wrap .algostep__list-node[data-state="active"]{background:color-mix(in srgb,var(--color-accent) 14%,var(--color-surface-1));border-color:var(--color-accent);outline:0}[data-book="dsa"] .algostep__list-wrap .algostep__list-node[data-emphasis="target"]{outline:2px dashed var(--color-accent);outline-offset:3px}[data-book="dsa"] .algostep__list-wrap .algostep__list-node[data-state="cursor"]{background:color-mix(in srgb,var(--color-text-2) 16%,var(--color-surface-1));border-color:var(--color-text-1)}[data-book="dsa"] .algostep__list-wrap .algostep__list-node[data-state="final"]{background:color-mix(in srgb,#2c8 14%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__list-wrap .algostep__list-pointer-row{position:relative;height:32px;margin-bottom:4px;z-index:2}[data-book="dsa"] .algostep__list-pointer-stack{position:absolute;bottom:0;transform:translateX(-50%);display:inline-flex;flex-direction:column;align-items:center;gap:3px}[data-book="dsa"] .algostep__list-pointer-stack .algostep__list-pointer{padding:2px 8px;font-size:0.6875rem;font-family:var(--font-mono,monospace);background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-1));border:1px solid color-mix(in srgb,var(--color-accent) 40%,var(--color-border-subtle));border-radius:999px;white-space:nowrap}[data-book="dsa"] .algostep__list-pointer--slow{background:color-mix(in srgb,#2c8 14%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__list-pointer--slow .algostep__list-pointer-label{color:#1a7}[data-book="dsa"] .algostep__list-pointer--fast{background:color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-1));border-color:var(--color-accent)}[data-book="dsa"] .algostep__list-pointer--fast .algostep__list-pointer-label{color:var(--color-accent)}[data-book="dsa"] .algostep__list-pointer--cursor{background:color-mix(in srgb,var(--color-text-2) 14%,var(--color-surface-1));border-style:dashed;border-color:var(--color-text-1)}[data-book="dsa"] .algostep__list-pointer--prev,[data-book="dsa"] .algostep__list-pointer--curr,[data-book="dsa"] .algostep__list-pointer--group_prev,[data-book="dsa"] .algostep__list-pointer--kth{background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-1));border-color:color-mix(in srgb,var(--color-accent) 50%,var(--color-border-subtle))}[data-book="dsa"] .algostep__lru-grid{display:grid;grid-template-columns:minmax(180px,1fr) minmax(280px,2fr);gap:24px;align-items:start}[data-book="dsa"] .algostep__lru-col{display:flex;flex-direction:column;gap:8px}[data-book="dsa"] .algostep__lru-col-label{font-size:0.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:0.06em;color:var(--color-text-2)}[data-book="dsa"] .algostep__lru-map-body{display:flex;flex-direction:column;gap:4px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:6px;padding:8px;min-height:80px}[data-book="dsa"] .algostep__lru-map-entry{display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:8px;padding:4px 8px;border-radius:4px;font-family:var(--font-mono,monospace);font-size:0.8125rem}[data-book="dsa"] .algostep__lru-map-entry[data-emphasis="active"]{background:color-mix(in srgb,var(--color-accent) 14%,transparent);outline:1.5px solid var(--color-accent);outline-offset:-1px}[data-book="dsa"] .algostep__lru-map-entry[data-state="evicted"]{background:color-mix(in srgb,var(--color-danger,#d23) 14%,transparent);text-decoration:line-through;opacity:0.7}[data-book="dsa"] .algostep__lru-map-key{font-weight:700;color:var(--color-text-1)}[data-book="dsa"] .algostep__lru-map-arrow{color:var(--color-text-2)}[data-book="dsa"] .algostep__lru-map-val{color:var(--color-accent)}[data-book="dsa"] .algostep__lru-list-body{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:8px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:6px;min-height:80px}[data-book="dsa"] .algostep__lru-sentinel{padding:6px 10px;border:1px dashed var(--color-text-2);border-radius:6px;color:var(--color-text-2);font-size:0.75rem;font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__lru-empty{color:var(--color-text-2);font-style:italic;font-size:0.8125rem;padding:8px}[data-book="dsa"] .algostep__lru-node{display:inline-flex;flex-direction:column;align-items:center;padding:6px 12px;background:color-mix(in srgb,var(--color-surface-2) 60%,var(--color-surface-1));border:1.5px solid color-mix(in srgb,var(--color-text-1) 30%,transparent);border-radius:8px;font-family:var(--font-mono,monospace);font-size:0.8125rem;position:relative;transition:background 200ms,border-color 200ms}[data-book="dsa"] .algostep__lru-node::before,[data-book="dsa"] .algostep__lru-node::after{content:'';position:absolute;top:50%;width:8px;height:1px;background:var(--color-text-2)}[data-book="dsa"] .algostep__lru-node::before{left:-8px}[data-book="dsa"] .algostep__lru-node::after{right:-8px}[data-book="dsa"] .algostep__lru-node-key{font-weight:700;color:var(--color-text-1)}[data-book="dsa"] .algostep__lru-node-value{color:var(--color-accent);font-size:0.75rem}[data-book="dsa"] .algostep__lru-node[data-state="mru"]{background:color-mix(in srgb,var(--color-accent) 16%,var(--color-surface-1));border-color:var(--color-accent)}[data-book="dsa"] .algostep__lru-node[data-state="lru"]{background:color-mix(in srgb,var(--color-text-2) 12%,var(--color-surface-1));border-color:var(--color-text-2)}[data-book="dsa"] .algostep__lru-node[data-state="evicted"]{background:color-mix(in srgb,var(--color-danger,#d23) 18%,var(--color-surface-1));border-color:var(--color-danger,#d23);text-decoration:line-through;opacity:0.7}[data-book="dsa"] .algostep__lru-node[data-emphasis="active"]{outline:2px solid var(--color-accent);outline-offset:2px}@media (prefers-reduced-motion: reduce){[data-book="dsa"] .algostep__list-wrap .algostep__list-node,[data-book="dsa"] .algostep__lru-node,[data-book="dsa"] .algostep__lru-map-entry,[data-book="dsa"] .algostep__list-link{transition:none}}[data-book="dsa"] .algostep__list-map-entries{display:flex;flex-wrap:wrap;gap:4px 12px}[data-book="dsa"] .algostep__list-map-entry{white-space:nowrap;color:var(--color-text-1)}[data-book="dsa"] .algostep__list-map-key{color:var(--color-accent);font-weight:700}[data-book="dsa"] .algostep__list-map-arrow{color:var(--color-text-2)}[data-book="dsa"] .algostep__list-map-empty{color:var(--color-text-2);font-style:italic}[data-book="dsa"] .algostep__bt-wrap{display:flex;justify-content:center;background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:8px;padding:var(--space-2)}[data-book="dsa"] .algostep__bt-svg{width:100%;max-width:600px;height:auto;aspect-ratio:15 / 8;color:var(--color-text-2)}[data-book="dsa"] .algostep__bt-edge{stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1.2;fill:none}[data-book="dsa"] .algostep__bt-node rect{fill:var(--color-surface-1);stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1.2;transition:fill 200ms,stroke 200ms}[data-book="dsa"] .algostep__bt-node text{font-size:11px;font-weight:600;fill:var(--color-text-1);font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__bt-node[data-state="current"] rect{fill:color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-1));stroke:var(--color-accent);stroke-width:2}[data-book="dsa"] .algostep__bt-node[data-extra="emitted"] rect{fill:color-mix(in srgb,#2c8 14%,var(--color-surface-1));stroke:#2c8}[data-book="dsa"] .algostep__bt-node[data-state="pruned"] rect{fill:color-mix(in srgb,#D55E00 22%,var(--color-surface-1));stroke:#D55E00;stroke-width:1.8;stroke-dasharray:3 2}[data-book="dsa"] .algostep__bt-side{display:flex;flex-wrap:wrap;gap:var(--space-2);align-items:center}[data-book="dsa"] .algostep__bt-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem}[data-book="dsa"] .algostep__bt-badge[data-kind="success"]{background:color-mix(in srgb,#2c8 18%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__bt-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__bt-badge-val{color:var(--color-text-1);font-weight:600;font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__sq-input{display:flex;gap:4px;flex-wrap:wrap;align-items:flex-end;min-height:100px}[data-book="dsa"] .algostep__sq-input[data-shape="bars"] .algostep__cell{position:relative;height:96px;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;background:transparent;border:0;padding:0;min-width:36px}[data-book="dsa"] .algostep__sq-input[data-shape="bars"] .algostep__cell::before{content:'';position:absolute;left:4px;right:4px;bottom:18px;height:var(--bar-height,50%);background:color-mix(in srgb,var(--color-text-2) 22%,var(--color-surface-1));border:1.5px solid color-mix(in srgb,var(--color-text-1) 25%,transparent);border-radius:4px 4px 0 0;transition:background 200ms,border-color 200ms;z-index:0}[data-book="dsa"] .algostep__sq-input[data-shape="bars"] .algostep__cell .algostep__cell-value{position:relative;z-index:1;margin-bottom:4px;font-weight:700;font-size:0.8125rem;color:var(--color-text-1)}[data-book="dsa"] .algostep__sq-input[data-shape="bars"] .algostep__cell .algostep__cell-index{position:relative;z-index:1;font-size:0.6875rem}[data-book="dsa"] .algostep__sq-input[data-shape="bars"] .algostep__cell[data-state="pointer"]::before{background:color-mix(in srgb,var(--color-accent) 30%,var(--color-surface-1));border-color:var(--color-accent)}[data-book="dsa"] .algostep__sq-input[data-shape="bars"] .algostep__cell[data-state="resolved"]::before{background:color-mix(in srgb,#2c8 22%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__sq-input[data-shape="bars"] .algostep__cell[data-emphasis="just-resolved"]::before{background:color-mix(in srgb,#2c8 38%,var(--color-surface-1));border-color:#2c8;box-shadow:0 0 0 2px #2c8}[data-book="dsa"] .algostep__sq-output .algostep__cell[data-state="resolved"]{background:color-mix(in srgb,#2c8 14%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__sq-output .algostep__cell[data-emphasis="just-resolved"]{outline:2px solid #2c8;outline-offset:2px}[data-book="dsa"] .algostep__sq-input:not([data-shape="bars"]) .algostep__cell[data-state="window"]{background:color-mix(in srgb,var(--color-accent) 10%,var(--color-surface-1));border-color:color-mix(in srgb,var(--color-accent) 35%,var(--color-border-subtle))}[data-book="dsa"] .algostep__sq-input:not([data-shape="bars"]) .algostep__cell[data-state="pointer"]{background:color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-1));border-color:var(--color-accent);outline:2px solid var(--color-accent);outline-offset:-2px}[data-book="dsa"] .algostep__sq-deque-cells{padding-top:1rem}[data-book="dsa"] .algostep__sq-deque-cells .algostep__cell{position:relative}[data-book="dsa"] .algostep__sq-deque-cells .algostep__cell[data-state="evicting"]{background:color-mix(in srgb,var(--color-danger) 12%,var(--color-surface-1));border-color:color-mix(in srgb,var(--color-danger) 55%,var(--color-border-subtle));opacity:0.7;text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--color-danger) 70%,transparent);text-decoration-thickness:2px}[data-book="dsa"] .algostep__sq-deque-cells .algostep__cell[data-state="evicting"]::before{position:absolute;top:-0.95rem;left:50%;transform:translateX(-50%);font-size:0.625rem;letter-spacing:0.04em;font-weight:600;color:var(--color-danger);white-space:nowrap}[data-book="dsa"] .algostep__sq-deque-cells .algostep__cell[data-emphasis="drop-front"]::before{content:'drop-front'}[data-book="dsa"] .algostep__sq-deque-cells .algostep__cell[data-emphasis="pop-tail"]::before{content:'pop-tail'}[data-book="dsa"] .algostep__sq-containers{display:flex;gap:var(--space-3);flex-wrap:wrap}[data-book="dsa"] .algostep__sq-stack,[data-book="dsa"] .algostep__sq-deque{display:flex;flex-direction:column;gap:4px;padding:var(--space-2);background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:6px;min-width:140px}[data-book="dsa"] .algostep__sq-amortized{display:flex;gap:var(--space-3)}[data-book="dsa"] .algostep__sq-label{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__sq-stack-cells,[data-book="dsa"] .algostep__sq-deque-cells{display:flex;gap:2px;flex-wrap:wrap;align-items:center}[data-book="dsa"] .algostep__sq-empty{color:var(--color-text-2);font-style:italic;font-size:0.8125rem}[data-book="dsa"] .algostep__sq-output{display:flex;gap:2px;flex-wrap:wrap;align-items:center}[data-book="dsa"] .algostep__sq-side{display:flex;flex-wrap:wrap;gap:var(--space-2)}[data-book="dsa"] .algostep__sq-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem}[data-book="dsa"] .algostep__sq-badge[data-kind="success"]{background:color-mix(in srgb,#2c8 18%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__sq-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__sq-badge-val{color:var(--color-text-1);font-weight:600;font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__trie-wrap{display:flex;justify-content:center;background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:8px;padding:var(--space-2)}[data-book="dsa"] .algostep__trie-svg{width:100%;max-width:560px;height:auto;aspect-ratio:15 / 8;color:var(--color-text-2)}[data-book="dsa"] .algostep__trie-edge{stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1.5}[data-book="dsa"] .algostep__trie-edge-char{font-size:11px;font-family:var(--font-mono,monospace);font-weight:700;fill:var(--color-accent);paint-order:stroke;stroke:var(--color-surface-1);stroke-width:3px;stroke-linejoin:round}[data-book="dsa"] .algostep__trie-node circle{fill:var(--color-surface-1);stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1.5;transition:fill 200ms,stroke 200ms}[data-book="dsa"] .algostep__trie-node text{font-size:11px;font-weight:600;fill:var(--color-text-1);font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__trie-node[data-state="current"] circle{fill:color-mix(in srgb,var(--color-accent) 22%,var(--color-surface-1));stroke:var(--color-accent);stroke-width:2.4}[data-book="dsa"] .algostep__trie-node[data-state="new"] circle{fill:color-mix(in srgb,#2c8 22%,var(--color-surface-1));stroke:#2c8}[data-book="dsa"] .algostep__trie-node[data-extra="end"] circle{stroke-dasharray:3 2;stroke-width:2.4}[data-book="dsa"] .algostep__trie-side{display:flex;flex-wrap:wrap;gap:var(--space-2)}[data-book="dsa"] .algostep__trie-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem;font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__trie-badge[data-kind="success"]{background:color-mix(in srgb,#2c8 18%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__trie-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__trie-badge-val{color:var(--color-text-1);font-weight:600}[data-book="dsa"] .algostep__str-rows{display:flex;flex-direction:column;gap:var(--space-2)}[data-book="dsa"] .algostep__str-row{display:flex;align-items:center;gap:var(--space-2);flex-wrap:wrap}[data-book="dsa"] .algostep__str-row-label{min-width:70px;color:var(--color-text-2);font-weight:600;font-size:0.75rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__str-row-cells{display:flex;gap:2px;flex-wrap:wrap}[data-book="dsa"] .algostep__str-side{display:flex;flex-wrap:wrap;gap:var(--space-2)}[data-book="dsa"] .algostep__str-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem}[data-book="dsa"] .algostep__str-badge[data-kind="success"]{background:color-mix(in srgb,#2c8 18%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__str-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__str-badge-val{color:var(--color-text-1);font-weight:600;font-variant-numeric:tabular-nums;font-family:var(--font-mono,monospace)}[data-book="dsa"] .algostep__str-row-cells .algostep__cell[data-emphasis="secondary"]{outline:2px dashed color-mix(in srgb,var(--color-accent) 60%,var(--color-text-2));outline-offset:-1px;position:relative}[data-book="dsa"] .algostep__str-row-cells .algostep__cell[data-emphasis="compare"]{outline:2px dashed color-mix(in srgb,var(--color-accent) 50%,var(--color-text-2));outline-offset:-1px}[data-book="dsa"] .algostep__str-row-cells .algostep__cell .algostep__cell-tag{position:absolute;top:-10px;right:-6px;font-size:0.625rem;font-weight:800;color:var(--color-accent);background:var(--color-surface-1);border:1px solid var(--color-accent);border-radius:999px;padding:0 4px;font-family:var(--font-mono,monospace);line-height:1.4}[data-book="dsa"] .algostep__dps-main{display:flex;flex-direction:column;gap:var(--space-2)}[data-book="dsa"] .algostep__dps-side{display:flex;flex-wrap:wrap;gap:var(--space-2)}[data-book="dsa"] .algostep__dps-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem}[data-book="dsa"] .algostep__dps-badge[data-kind="success"]{background:color-mix(in srgb,#2c8 18%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__dps-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__dps-badge-val{color:var(--color-text-1);font-weight:600}[data-book="dsa"] .algostep__bmd-grid{display:flex;flex-direction:column;gap:4px}[data-book="dsa"] .algostep__bmd-row{display:flex;align-items:center;gap:4px}[data-book="dsa"] .algostep__bmd-rowlabel{min-width:60px;font-family:var(--font-mono,monospace);font-size:0.75rem;color:var(--color-text-2)}[data-book="dsa"] .algostep__bmd-queue{display:flex;align-items:center;gap:var(--space-2);flex-wrap:wrap;padding:var(--space-2);border:1px solid var(--color-border-subtle);border-radius:6px;background:var(--color-surface-1)}[data-book="dsa"] .algostep__bmd-queue-list{display:flex;flex-wrap:wrap;gap:4px}[data-book="dsa"] .algostep__bmd-q-entry{padding:2px 8px;background:color-mix(in srgb,var(--color-accent) 8%,var(--color-surface-1));border:1px solid color-mix(in srgb,var(--color-accent) 30%,var(--color-border-subtle));border-radius:4px;font-family:var(--font-mono,monospace);font-size:0.75rem}[data-book="dsa"] .algostep__bmd-graph{display:inline-flex;align-items:center;gap:12px;padding:6px 12px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;margin-bottom:8px}[data-book="dsa"] .algostep__bmd-graph-label{font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--color-text-2);font-weight:700}[data-book="dsa"] .algostep__bmd-graph-inner{display:inline-flex;align-items:center;gap:0}[data-book="dsa"] .algostep__bmd-graph-node{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--color-surface-2);border:1.5px solid color-mix(in srgb,var(--color-text-1) 25%,transparent);font-family:var(--font-mono,monospace);font-size:0.875rem;font-weight:700}[data-book="dsa"] .algostep__bmd-graph-node[data-state="current"]{background:color-mix(in srgb,var(--color-accent) 18%,var(--color-surface-1));border-color:var(--color-accent);color:var(--color-accent)}[data-book="dsa"] .algostep__bmd-graph-edge{display:inline-block;width:24px;height:1.5px;background:color-mix(in srgb,var(--color-text-1) 25%,transparent)}[data-book="dsa"] .algostep__bmd-cell{padding:4px 6px;min-width:40px}[data-book="dsa"] .algostep__bmd-lights{display:inline-flex;gap:2px}[data-book="dsa"] .algostep__bmd-light{width:8px;height:8px;border-radius:50%;border:1px solid color-mix(in srgb,var(--color-text-1) 30%,transparent)}[data-book="dsa"] .algostep__bmd-light[data-state="on"]{background:var(--color-accent);border-color:var(--color-accent)}[data-book="dsa"] .algostep__bmd-light[data-state="off"]{background:transparent}[data-book="dsa"] .algostep__bmd-cell[data-state="goal"]{background:color-mix(in srgb,#2c8 16%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__iv-wrap{display:flex;justify-content:center;background:color-mix(in srgb,var(--color-surface-2) 40%,transparent);border:1px solid var(--color-border-subtle);border-radius:8px;padding:var(--space-2)}[data-book="dsa"] .algostep__iv-svg{width:100%;max-width:600px;height:auto;aspect-ratio:15 / 7;color:var(--color-text-2)}[data-book="dsa"] .algostep__iv-baseline,[data-book="dsa"] .algostep__iv-tick{stroke:var(--color-border-strong,var(--color-text-2));stroke-width:1}[data-book="dsa"] .algostep__iv-tick-label,[data-book="dsa"] .algostep__iv-label{font-size:11px;fill:var(--color-text-2);font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__iv-bar{fill:color-mix(in srgb,var(--color-text-2) 18%,var(--color-surface-1));stroke:var(--color-text-2);stroke-width:1;transition:fill 200ms,stroke 200ms}[data-book="dsa"] .algostep__iv-bar[data-state="in-tree"]{fill:color-mix(in srgb,var(--color-accent) 30%,var(--color-surface-1));stroke:var(--color-accent);stroke-width:1.5}[data-book="dsa"] .algostep__iv-bar[data-state="rejected"]{fill:color-mix(in srgb,var(--color-danger,#d23) 22%,var(--color-surface-1));stroke:var(--color-danger,#d23);stroke-dasharray:3 2;opacity:0.7}[data-book="dsa"] .algostep__iv-bar[data-state="candidate"]{fill:color-mix(in srgb,var(--color-accent) 16%,var(--color-surface-1));stroke:var(--color-accent);stroke-dasharray:3 2}[data-book="dsa"] .algostep__iv-endpoint{fill:var(--color-text-1)}[data-book="dsa"] .algostep__iv-cursor{stroke:var(--color-accent);stroke-width:1.5;stroke-dasharray:4 3}[data-book="dsa"] .algostep__iv-cursor-label{font-size:11px;fill:var(--color-accent);font-weight:600;font-variant-numeric:tabular-nums}[data-book="dsa"] .algostep__iv-side{display:flex;flex-wrap:wrap;gap:var(--space-2)}[data-book="dsa"] .algostep__iv-badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;background:var(--color-surface-1);border:1px solid var(--color-border-subtle);border-radius:999px;font-size:0.8125rem}[data-book="dsa"] .algostep__iv-badge[data-kind="success"]{background:color-mix(in srgb,#2c8 18%,var(--color-surface-1));border-color:#2c8}[data-book="dsa"] .algostep__iv-badge[data-kind="danger"]{background:color-mix(in srgb,var(--color-danger,#d23) 14%,var(--color-surface-1));border-color:var(--color-danger,#d23)}[data-book="dsa"] .algostep__iv-badge-key{color:var(--color-text-2);font-weight:600;font-size:0.6875rem;text-transform:uppercase;letter-spacing:0.04em}[data-book="dsa"] .algostep__iv-badge-val{color:var(--color-text-1);font-weight:600;font-variant-numeric:tabular-nums}@media (prefers-reduced-motion: reduce){[data-book="dsa"] .algostep__graph-edge line,[data-book="dsa"] .algostep__graph-node circle,[data-book="dsa"] .algostep__grid-cell,[data-book="dsa"] .algostep__tree-edge,[data-book="dsa"] .algostep__tree-node circle,[data-book="dsa"] .algostep__tree-array-cell,[data-book="dsa"] .algostep__list-node,[data-book="dsa"] .algostep__bt-edge,[data-book="dsa"] .algostep__bt-node rect,[data-book="dsa"] .algostep__trie-edge,[data-book="dsa"] .algostep__trie-node circle,[data-book="dsa"] .algostep__iv-bar{transition:none !important}}