:root{--bg: #f6f7f9;--surface: #ffffff;--surface-2: #eef1f4;--text: #14181f;--muted: #5d6673;--border: #dde2e8;--accent: #0f766e;--accent-text: #ffffff;--ok: #16a34a;--off: #9aa3ae;--warn-bg: #fff7e6;--warn-border: #f2c46d;--skin: #f1d3bd;--skin-edge: #9a6f55;--joint: #b98d72;color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg: #0d1014;--surface: #161a20;--surface-2: #1e242c;--text: #e8ecf1;--muted: #97a1ad;--border: #2a313b;--accent: #2dd4bf;--accent-text: #062b27;--ok: #4ade80;--off: #56606c;--warn-bg: #2b2414;--warn-border: #7a5f25;--skin: #d9b39a;--skin-edge: #6b4a37;--joint: #8c6650;color-scheme:dark}}*{box-sizing:border-box}[hidden]{display:none!important}input[type=range],input[type=checkbox]{accent-color:var(--accent)}html,body{margin:0}body{background:var(--bg);color:var(--text);font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;min-height:100vh;display:flex;flex-direction:column}h1,h2,h3{margin:0;line-height:1.2}h1{font-size:1.25rem}h2{font-size:1.15rem}h3{font-size:1rem;margin-bottom:4px}a{color:var(--accent)}.muted{color:var(--muted)}.small{font-size:.85rem}.top{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:16px 24px;border-bottom:1px solid var(--border);background:var(--surface)}.brand{display:flex;gap:12px;align-items:center}.sub{margin:2px 0 0;color:var(--muted);font-size:.85rem}.hw{display:flex;gap:8px}.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;border:1px solid var(--border);font-size:.8rem;color:var(--muted)}.pill i{width:8px;height:8px;border-radius:50%;background:var(--off)}.pill.on{color:var(--text)}.pill.on i{background:var(--ok)}.notice{margin:16px 24px 0;padding:10px 14px;border-radius:10px;background:var(--warn-bg);border:1px solid var(--warn-border);font-size:.9rem}.grid{flex:1;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:16px;padding:16px 24px;max-width:1280px;width:100%;margin:0 auto}@media(max-width:860px){.grid{grid-template-columns:1fr;padding:16px}.top{padding:12px 16px}.notice{margin:12px 16px 0}}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:12px;min-width:0}.tabs{display:flex;gap:4px;background:var(--surface-2);padding:4px;border-radius:10px}.tabs button{flex:1;border:0;background:transparent}.tabs button[aria-selected=true]{background:var(--surface);box-shadow:0 1px 2px #0000001f}.panel{display:flex;flex-direction:column;gap:12px}.panel p{margin:0}button,select{font:inherit;color:var(--text);background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:7px 12px;cursor:pointer}button:disabled{opacity:.5;cursor:default}button.primary{background:var(--accent);color:var(--accent-text);border-color:transparent;font-weight:600}select{max-width:100%;min-width:0}.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.video-wrap{position:relative;aspect-ratio:4 / 3;background:#000;border-radius:10px;overflow:hidden}.video-wrap video,.video-wrap canvas{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}.video-empty{position:absolute;inset:0;display:flex;flex-direction:column;gap:12px;align-items:center;justify-content:center;text-align:center;padding:24px;color:#d6dbe1;background:#11151a}.video-empty p{max-width:32ch;margin:0}.hand-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px}#hand{width:100%;aspect-ratio:1 / 1;max-height:340px}.bars{display:grid;gap:6px}.bar{display:grid;grid-template-columns:76px 1fr 40px;gap:8px;align-items:center;font-size:.85rem}.bar .track{height:8px;border-radius:4px;background:var(--surface-2);overflow:hidden}.bar .fill{height:100%;background:var(--accent);transition:width 80ms linear}.bar output{text-align:right;color:var(--muted);font-variant-numeric:tabular-nums}.arduino{border-top:1px solid var(--border);padding-top:12px;display:flex;flex-direction:column;gap:8px}.arduino p{margin:0}.switch{display:inline-flex;gap:6px;align-items:center;font-size:.9rem}.eeg-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.eeg-stats div{background:var(--surface-2);border-radius:8px;padding:8px 10px}.eeg-stats .label{display:block;font-size:.75rem;color:var(--muted)}.eeg-stats strong{font-size:1.2rem;font-variant-numeric:tabular-nums}@media(max-width:480px){.eeg-stats{grid-template-columns:repeat(2,1fr)}}.field{display:flex;gap:8px;align-items:center}.field input{flex:1}.sliders{display:grid;gap:8px}.sliders label{display:grid;grid-template-columns:76px 1fr 40px;gap:8px;align-items:center}.foot{padding:16px 24px;color:var(--muted);font-size:.85rem;text-align:center}button.link{background:none;border:0;padding:7px 4px;color:var(--accent);text-decoration:underline}