:root{--felt-1:#0f4c3a;--felt-2:#0a3327;--felt-vignette:#062018;--card-face:#fbf6e9;--card-edge:#e7dcc0;--ink:#201d16;--red:#a4362c;--gold:#c9a227;--gold-bright:#f0d878;--panel:#123c30;--panel-line:#f0d8782e;--text-soft:#d9ead9;--text-dim:#9db8a9;--move-dur:.42s;--font-display:"Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;--font-body:-apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}*{box-sizing:border-box}html,body{margin:0;padding:0}body{min-height:100vh;font-family:var(--font-body);color:var(--text-soft);background:radial-gradient(ellipse at 50% -10%, #f0d8781a, transparent 55%), radial-gradient(ellipse at 50% 120%, var(--felt-vignette), transparent 60%), linear-gradient(160deg, var(--felt-1), var(--felt-2) 70%);background-attachment:fixed;padding:18px 18px 36px}.wrap{max-width:1180px;margin:0 auto}header{text-align:center;margin-bottom:14px}.eyebrow{font-family:var(--font-mono);letter-spacing:.32em;color:var(--gold-bright);text-transform:uppercase;opacity:.85;font-size:11px}h1{font-family:var(--font-display);color:#fbf6e9;letter-spacing:.01em;margin:6px 0 4px;font-size:clamp(26px,4vw,40px);font-weight:700}h1 .suit{color:var(--red)}.subtitle{color:var(--text-dim);max-width:620px;margin:0 auto;font-size:14px;line-height:1.6}.deck{border:1px solid var(--panel-line);background:linear-gradient(#ffffff0d,#ffffff05);border-radius:14px;flex-wrap:wrap;justify-content:center;align-items:center;gap:10px 14px;margin-bottom:14px;padding:10px 16px;display:flex;box-shadow:inset 0 10px 30px #00000040,0 4px 14px #0003}.field{flex-direction:column;gap:4px;display:flex}.field label{letter-spacing:.08em;color:var(--text-dim);text-transform:uppercase;font-size:10.5px;font-family:var(--font-mono)}select,input[type=range]{accent-color:var(--gold)}select{color:var(--text-soft);border:1px solid var(--panel-line);font-size:14px;font-family:var(--font-body);background:#0d2e24;border-radius:8px;min-width:150px;padding:7px 10px}input[type=range]{width:120px}.btn-row{align-items:flex-end;gap:8px;height:100%;display:flex}button{font-family:var(--font-body);border:1px solid var(--panel-line);color:var(--text-soft);cursor:pointer;white-space:nowrap;background:linear-gradient(#17493a,#0e3327);border-radius:9px;padding:9px 16px;font-size:13.5px;font-weight:600;transition:transform .12s,box-shadow .12s,background .12s}button:hover{transform:translateY(-1px);box-shadow:0 4px 12px #0000004d}button:active{transform:translateY(0)scale(.98)}button.primary{background:linear-gradient(180deg, var(--gold-bright), var(--gold));color:#26200a;border-color:#00000026}button.ghost{background:0 0}button:disabled{opacity:.4;cursor:not-allowed;transform:none}.stage{background:linear-gradient(145deg,#0a2e22,#082820);border-radius:18px;padding:8px;position:relative;box-shadow:0 0 0 1px #f0d87826,0 20px 50px #0006}.table-felt{background:repeating-linear-gradient(135deg, #ffffff04 0 2px, transparent 2px 6px), radial-gradient(ellipse at 50% 0%, #ffffff0d, transparent 60%), var(--felt-1);border-radius:14px;min-height:200px;padding:16px 20px 22px;position:relative;overflow:auto hidden}.track{height:132px;margin:0 auto;position:relative}.range-band{height:148px;transition:left var(--move-dur) ease, width var(--move-dur) ease, opacity .2s ease;pointer-events:none;opacity:0;background:#f0d8780f;border:1.5px dashed #f0d8788c;border-radius:10px;position:absolute;top:-8px}.card{background:linear-gradient(160deg, var(--card-face), #f1e9d2);border:1px solid var(--card-edge);width:68px;height:96px;transform:translateX(var(--x,0px));transition:transform var(--move-dur) cubic-bezier(.5,-.2,.4,1.3), box-shadow .2s ease;will-change:transform;font-family:var(--font-display);color:var(--ink);user-select:none;border-radius:9px;flex-direction:column;justify-content:space-between;padding:4px 5px;display:flex;position:absolute;top:0;left:0;box-shadow:0 2px 4px #00000040,0 8px 16px #00000040}.card.red{color:var(--red)}.card .corner{text-align:center;font-size:13px;font-weight:700;line-height:1}.card .corner .suit-mini{margin-top:1px;font-size:11px;display:block}.card .corner.bottom{align-self:flex-end;transform:rotate(180deg)}.card .pip{opacity:.9;justify-content:center;align-items:center;font-size:26px;display:flex;position:absolute;inset:0}.card.is-comparing{transform:translateX(var(--x,0px)) translateY(-16px) scale(1.06);box-shadow:0 0 0 2.5px var(--gold-bright), 0 14px 22px #00000059;z-index:5}.card.is-pivot{box-shadow:0 0 0 2.5px var(--red), 0 14px 22px #00000059;z-index:6}.card.is-pivot.is-comparing{box-shadow:0 0 0 2.5px var(--red), 0 0 14px 2px #a4362c99, 0 14px 22px #00000059}.card.is-swapping{transform:translateX(var(--x,0px)) translateY(-24px) scale(1.09) rotate(var(--tilt,0deg));box-shadow:0 0 0 2.5px var(--gold-bright), 0 18px 26px 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solid var(--panel-line);background:linear-gradient(#ffffff0a,#ffffff04);border-radius:14px;padding:13px 16px}.panel h2{font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--gold-bright);margin:0 0 10px;font-size:11px}.panel-head-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;display:flex}.panel-head-row h2{margin:0}.toggle-group{border:1px solid var(--panel-line);background:#0003;border-radius:8px;gap:4px;padding:3px;display:flex}.toggle-btn{font-family:var(--font-mono);letter-spacing:.02em;color:var(--text-dim);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:5px 10px;font-size:11px;transition:background .15s,color .15s}.toggle-btn:hover{box-shadow:none;color:var(--text-soft);transform:none}.toggle-btn.active{background:linear-gradient(180deg, var(--gold-bright), var(--gold));color:#26200a;font-weight:700}.code-scroll{max-height:300px;overflow:auto}.code-scroll .flow-wrap{justify-content:flex-start;padding:0}.code-scroll .flow-wrap svg{width:300px;height:auto;margin:0 auto;display:block}.algo-desc{color:var(--text-soft);border-bottom:1px dashed var(--panel-line);margin:-4px 0 12px;padding-bottom:10px;font-size:13px;line-height:1.6}.message-line{color:#fbf6e9;min-height:22px;margin-bottom:10px;font-size:15px;font-weight:600}.stat-row{flex-wrap:wrap;gap:18px;margin-bottom:4px;display:flex}.stat{font-family:var(--font-mono);color:var(--text-dim);font-size:13px}.stat b{color:#fbf6e9;font-size:16px;display:block}pre.pseudo{font-family:var(--font-mono);color:var(--text-dim);margin:0;font-size:12.5px;line-height:1.85;overflow-x:auto}pre.pseudo .ln{white-space:pre;border-radius:4px;padding:1px 8px;display:block}pre.pseudo .ln.active{color:#fdf6df;box-shadow:inset 3px 0 0 var(--gold-bright);background:#f0d8782e}.flow-wrap{justify-content:center;padding:4px 0 2px;display:flex;overflow-x:auto}.flowchart{max-width:100%;height:auto;display:block}.flowchart .fc-shape{fill:#123c30;stroke:#e7dcc0;stroke-width:1.4px}.flowchart .fc-loop .fc-shape{fill:#1c4d3c}.flowchart .fc-dec .fc-shape{fill:#20493a}.flowchart .fc-pre .fc-shape{fill:#123c30}.flowchart .fc-pre .fc-innerline{stroke:#e7dcc0;stroke-width:1.2px}.flowchart text{fill:#e7f1e9;font-family:var(--font-mono);text-anchor:middle;dominant-baseline:middle;font-size:10.5px}.flowchart .fc-branch{fill:var(--gold-bright);font-size:10px}.flowchart .fc-edge{stroke:#9db8a9;stroke-width:1.4px;fill:none}.flow-node.active .fc-shape{stroke:var(--gold-bright);stroke-width:2.6px;filter:drop-shadow(0 0 5px #f0d878a6)}.flow-node.active text{fill:#fdf6df;font-weight:700}table.complexity{border-collapse:collapse;width:100%;margin-top:4px;font-size:12.5px}table.complexity td,table.complexity th{text-align:left;border-bottom:1px solid var(--panel-line);color:var(--text-soft);padding:4px 6px}table.complexity th{color:var(--text-dim);font-weight:500;font-family:var(--font-mono);text-transform:uppercase;font-size:11px}table.complexity td.hi{color:var(--gold-bright);font-weight:700}footer{text-align:center;color:var(--text-dim);margin-top:26px;font-size:12px}