:root{--bg: #f4f1ea;--card: #fdfbf6;--ink: #1a1814;--ink-soft: #57534e;--ink-faint: #a8a29e;--rule: #2a2620;--accent: #c2410c;--accent-soft: #fef3e9;--green: #15803d;--green-soft: #dcfce7;--red: #b91c1c;--grid: rgba(26, 24, 20, .06)}*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg);color:var(--ink);font-family:Manrope,sans-serif;font-size:15px;line-height:1.5;min-height:100vh;-webkit-font-smoothing:antialiased}body{background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:32px 32px}header{border-bottom:1px solid var(--rule);background:var(--bg);position:sticky;top:0;z-index:10}.header-inner{max-width:1200px;margin:0 auto;padding:18px 32px;display:flex;align-items:baseline;justify-content:space-between;gap:32px}.logo{font-family:Fraunces,serif;font-weight:600;font-size:24px;letter-spacing:-.02em;font-style:italic}.logo .dot{color:var(--accent);font-style:normal}.header-meta{display:flex;gap:24px;align-items:baseline;font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-soft)}.progress{display:flex;gap:10px;align-items:center}.progress-dot{width:10px;height:10px;border-radius:50%;background:transparent;border:1.5px solid var(--ink-faint);cursor:pointer;transition:all .25s}.progress-dot.active{background:var(--accent);border-color:var(--accent);transform:scale(1.15)}.progress-dot.completed{background:var(--ink);border-color:var(--ink)}.progress-label{font-family:JetBrains Mono,monospace;font-size:11px;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.14em;margin-left:6px}main{max-width:1200px;margin:0 auto;padding:32px 32px 80px}.caption{text-align:center;margin-bottom:28px}.caption-label{display:inline-block;font-size:11px;text-transform:uppercase;letter-spacing:.18em;color:var(--ink-soft);padding:4px 12px;border:1px solid var(--rule);border-radius:100px;background:var(--bg)}.caption h1{font-family:Fraunces,serif;font-weight:600;font-size:30px;margin-top:14px;color:var(--ink);letter-spacing:-.025em}.caption h1 .em{font-style:italic;font-weight:500;color:var(--ink-soft)}.stage{max-width:860px;margin:0 auto;position:relative}.card-deck{position:relative;width:100%;aspect-ratio:4 / 3}.card{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--card);border:1px solid var(--rule);border-radius:4px;box-shadow:0 1px 0 var(--rule),0 30px 60px -30px #1a181447,0 16px 32px -16px #1a181424;opacity:0;transform:translate(40px) scale(.98);pointer-events:none;transition:opacity .5s ease,transform .5s cubic-bezier(.2,.8,.2,1);overflow:hidden;display:flex;flex-direction:column}.card.active{opacity:1;transform:translate(0) scale(1);pointer-events:auto}.card.previous{opacity:0;transform:translate(-40px) scale(.98)}.card-strip{padding:14px 28px;border-bottom:1px solid var(--rule);display:flex;justify-content:space-between;align-items:center;font-family:JetBrains Mono,monospace;font-size:10px;text-transform:uppercase;letter-spacing:.16em;color:var(--ink-soft);background:var(--bg)}.card-strip .step{color:var(--accent);font-weight:700}.card-strip .step-num{display:inline-block;width:18px;height:18px;border-radius:50%;background:var(--accent);color:var(--card);text-align:center;line-height:18px;margin-right:6px;font-weight:700}.difficulty{font-size:9px;padding:2px 7px;border-radius:2px;background:#dcfce7;color:#166534;font-weight:600}.card-body{flex:1;padding:28px 32px 24px;display:flex;flex-direction:column;min-height:0}.card-title{font-family:Fraunces,serif;font-weight:600;font-size:26px;letter-spacing:-.02em;margin-bottom:4px}.card-subtitle{font-family:Fraunces,serif;font-style:italic;font-weight:400;font-size:15px;color:var(--ink-soft);margin-bottom:22px}.viz{flex:1;display:flex;align-items:center;justify-content:center;min-height:0}.viz svg{max-width:100%;max-height:100%;width:100%;height:auto}.controls{margin-top:32px;display:flex;justify-content:center;align-items:center;gap:12px;max-width:860px;margin-left:auto;margin-right:auto}.btn{font-family:Manrope,sans-serif;font-size:12px;text-transform:uppercase;letter-spacing:.14em;font-weight:600;padding:14px 22px;border:1px solid var(--rule);background:var(--bg);color:var(--ink);cursor:pointer;border-radius:3px;transition:all .2s;display:inline-flex;align-items:center;gap:8px}.btn:hover{background:var(--ink);color:var(--bg)}.btn:disabled{opacity:.3;cursor:not-allowed}.btn:disabled:hover{background:var(--bg);color:var(--ink)}.btn-primary{background:var(--accent);color:var(--bg);border-color:var(--accent);min-width:220px;justify-content:center}.btn-primary:hover{background:var(--ink);border-color:var(--ink)}.kbd{font-family:JetBrains Mono,monospace;font-size:10px;background:#ffffff2e;padding:2px 5px;border-radius:2px;text-transform:none;letter-spacing:0}.btn:not(.btn-primary) .kbd{background:#1a181414}.hint{text-align:center;margin-top:22px;font-size:11px;text-transform:uppercase;letter-spacing:.18em;color:var(--ink-faint);font-family:JetBrains Mono,monospace}.anim-controls{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:14px;padding-top:14px;border-top:1px dotted var(--ink-faint)}.anim-step-label{font-family:JetBrains Mono,monospace;font-size:11px;color:var(--ink-soft);min-width:100px;text-align:center}.anim-step-label .current{color:var(--accent);font-weight:700}.anim-btn{width:32px;height:32px;border-radius:50%;border:1px solid var(--rule);background:var(--card);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .15s;font-size:12px}.anim-btn:hover{background:var(--ink);color:var(--bg)}.anim-btn:disabled{opacity:.3;cursor:not-allowed}.anim-btn.play{background:var(--accent);color:var(--bg);border-color:var(--accent);width:auto;padding:0 14px;font-size:10px;text-transform:uppercase;letter-spacing:.1em;font-weight:600;font-family:Manrope,sans-serif}.anim-btn.play:hover{background:var(--ink);border-color:var(--ink)}.anim-status{font-family:Fraunces,serif;font-style:italic;font-size:14px;color:var(--ink);flex:1;max-width:380px;text-align:center}@media(max-width:760px){.header-inner{padding:14px 20px;flex-direction:column;gap:10px;align-items:flex-start}.header-meta{width:100%;justify-content:space-between;gap:8px;flex-wrap:wrap;font-size:10px}main{padding:22px 14px 60px}.caption h1{font-size:22px}.card-deck{aspect-ratio:3 / 4}.card-body{padding:20px 18px 18px}.card-title{font-size:20px}.card-subtitle{font-size:13px;margin-bottom:14px}.controls{flex-wrap:wrap}.btn-primary{min-width:0;flex:1}.btn{font-size:11px;padding:12px 14px}}