.rppg-demo{--surface:#ffffff;--surface-2:#f1f5f9;--border:#e2e8f0;--text:#0f172a;--muted:#64748b;--accent:#059669;--accent-ink:#ffffff;--grid:#e2e8f0;--pos:#2563eb;--pbv:#7c3aed;--dis:#059669;--ch-r:#e11d48;--ch-g:#16a34a;--ch-b:#2563eb;--good:#059669;--fair:#d97706;--poor:#dc2626;max-width:1120px;margin:0 auto;padding:0 16px;color:var(--text);line-height:1.6}.dark .rppg-demo{--surface:rgba(255, 255, 255, 0.04);--surface-2:rgba(255, 255, 255, 0.08);--border:rgba(255, 255, 255, 0.12);--text:#e5e7eb;--muted:#94a3b8;--accent:#10b981;--accent-ink:#052e1f;--grid:rgba(255, 255, 255, 0.1);--pos:#60a5fa;--pbv:#a78bfa;--dis:#34d399;--ch-r:#fb7185;--ch-g:#4ade80;--ch-b:#60a5fa;--good:#34d399;--fair:#fbbf24;--poor:#f87171}.rppg-demo,.rppg-demo *{box-sizing:border-box}.rppg-demo [hidden]{display:none!important}.rppg-demo a{color:var(--accent)}.rppg-demo h3{font-size:17px;font-weight:600;margin:0 0 8px}.rppg-demo .card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px}.rppg-demo .demo{display:grid;grid-template-columns:minmax(0,1.1fr)minmax(0,1fr);gap:16px;align-items:start}@media(max-width:860px){.rppg-demo .demo{grid-template-columns:minmax(0,1fr)}}.rppg-demo .stage{position:relative;border-radius:10px;overflow:hidden;background:#000;aspect-ratio:4/3}.rppg-demo .stage canvas{display:block;width:100%;height:auto}.rppg-demo .stage video{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}.rppg-demo .placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px;text-align:center;color:#cbd5e1;background:radial-gradient(circle at 50% 40%,#1e293b,#020617)}.rppg-demo .placeholder svg{opacity:.85}.rppg-demo .placeholder p{margin:0;font-size:14px;max-width:340px}.rppg-demo .controls{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:12px}.rppg-demo button{font:inherit;font-weight:600;border:0;border-radius:999px;padding:10px 22px;cursor:pointer;background:var(--accent);color:var(--accent-ink)}.rppg-demo button.secondary{background:var(--surface-2);color:var(--text);border:1px solid var(--border)}.rppg-demo button:disabled{opacity:.5;cursor:not-allowed}.rppg-demo .status{font-size:14px;color:var(--muted);flex:1 1 200px}.rppg-demo .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;font-size:12px}.rppg-demo .chip{font-size:12px;padding:2px 10px;border-radius:999px;background:var(--surface-2);color:var(--muted);border:1px solid var(--border)}.rppg-demo .chip:empty{display:none}.rppg-demo .chip[data-state=ok]{color:var(--good)}.rppg-demo .chip[data-state=failed]{color:var(--fair)}.rppg-demo .progress{height:4px;background:var(--surface-2);border-radius:999px;margin-top:12px;overflow:hidden}.rppg-demo .progress>div{height:100%;width:0;background:var(--accent);transition:width .3s}.rppg-demo .results,.rppg-demo .left{display:grid;gap:16px}.rppg-demo .methods{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}@media(max-width:560px){.rppg-demo .methods{grid-template-columns:minmax(0,1fr)}}.rppg-demo .methods .card{padding:14px}.rppg-demo .method .name{display:flex;align-items:center;gap:8px;font-weight:600;font-size:14px}.rppg-demo .method .name i{width:10px;height:10px;border-radius:50%;display:inline-block}.rppg-demo .method .sub{font-size:12px;color:var(--muted)}.rppg-demo .bpm{display:flex;align-items:baseline;gap:6px;margin:6px 0 2px}.rppg-demo .bpm strong{font-size:40px;line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.03em}.rppg-demo .bpm span{color:var(--muted);font-size:14px}.rppg-demo .quality{font-size:12px;color:var(--muted)}.rppg-demo .quality[data-level=good]{color:var(--good)}.rppg-demo .quality[data-level=fair]{color:var(--fair)}.rppg-demo .quality[data-level=poor]{color:var(--poor)}.rppg-demo canvas.wave{width:100%;height:56px;display:block;margin-top:8px}.rppg-demo canvas.spectrum{width:100%;height:120px;display:block}.rppg-demo canvas.spectrogram{width:100%;height:140px;display:block;border-radius:6px}.rppg-demo .chart-head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:6px}.rppg-demo .chart-head h3{margin:0;font-size:14px}.rppg-demo .legend{display:flex;gap:12px;font-size:12px;color:var(--muted)}.rppg-demo .legend i{display:inline-block;width:12px;height:3px;border-radius:2px;vertical-align:middle;margin-right:4px}.rppg-demo select{font:inherit;font-size:13px;padding:2px 6px;border-radius:6px;border:1px solid var(--border);background:var(--surface-2);color:var(--text)}.rppg-demo .axis-note{font-size:11px;color:var(--muted);margin-top:4px}.rppg-demo .sig-note{font-size:13px;color:var(--muted);margin:0 0 12px}.rppg-demo .bars{display:grid;gap:8px}.rppg-demo .bar-row{display:grid;grid-template-columns:16px minmax(0,1fr)40px;align-items:center;gap:10px;font-size:13px}.rppg-demo .bar-row>span{color:var(--muted);font-weight:600}.rppg-demo .bar-row>b{font-variant-numeric:tabular-nums;text-align:right;font-weight:600}.rppg-demo .track{position:relative;height:10px;background:var(--surface-2);border-radius:999px}.rppg-demo .fill{height:100%;border-radius:999px;transition:width .4s}.rppg-demo .fill.r{background:var(--ch-r)}.rppg-demo .fill.g{background:var(--ch-g)}.rppg-demo .fill.b{background:var(--ch-b)}.rppg-demo .mark{position:absolute;top:-3px;width:2px;height:16px;margin-left:-1px;background:var(--text);opacity:.55}.rppg-demo .sig-meta{font-size:12px;color:var(--muted);margin-top:10px}.rppg-demo .sig-controls{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-top:12px}.rppg-demo .seg{display:inline-flex;border:1px solid var(--border);border-radius:999px;overflow:hidden;font-size:13px}.rppg-demo .seg label{padding:4px 12px;cursor:pointer;color:var(--muted)}.rppg-demo .seg input{position:absolute;opacity:0;pointer-events:none}.rppg-demo .seg label:has(input:checked){background:var(--accent);color:var(--accent-ink)}.rppg-demo .seg label:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:-2px}.rppg-demo button.link{background:0 0;color:var(--accent);padding:0;font-weight:500;font-size:13px}.rppg-demo .tips{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:16px}.rppg-demo .tip{font-size:14px;color:var(--muted)}.rppg-demo .tip b{color:var(--text);display:block}.rppg-demo .note{font-size:13px;color:var(--muted);margin:24px 0 0}.rppg-demo .note+.note{margin-top:4px}