:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#0a0f18;--panel:#0d1522eb;--panel-strong:#121f31fa;--ink:#f6fbff;--muted:#9fb3c9;--muted-2:#6f839a;--line:#ffffff1f;--accent:#ffd36a;--accent-2:#73e0ff;--good:#9aff9a;--bad:#ff7f86;--home:#ffd36a2e;--shadow:#00000059}*{box-sizing:border-box}html,body{background:radial-gradient(circle at 20% 20%, #17243a 0, var(--bg) 52%, #05070b 100%);width:100%;min-height:100%;color:var(--ink);margin:0;font-family:ui-rounded,Trebuchet MS,Segoe UI,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;overflow:hidden}button,input{font:inherit}.no-script,.dependency-error{z-index:100;color:var(--ink);background:#08111d;place-items:center;padding:24px;display:grid;position:fixed;inset:0}.dependency-error.hidden{display:none}.dependency-error>div,.no-script{border:1px solid var(--line);background:var(--panel-strong);max-width:720px;box-shadow:0 24px 80px var(--shadow);border-radius:24px;padding:28px}code{color:#fff1bd;background:#ffffff14;border-radius:7px;padding:2px 6px}.app-shell{grid-template:"scene side"minmax(0,1fr)"band band"minmax(280px,44dvh)/minmax(0,1fr) minmax(300px,400px);height:100dvh;display:grid}body[data-layout=side] .app-shell{grid-template:"scene side""scene band"minmax(0,1fr)/minmax(0,1fr) minmax(360px,460px)}.scene-shell{background:linear-gradient(#17243b,#0d1726 48%,#11170f);grid-area:scene;min-width:0;position:relative;overflow:hidden}.scene-mount{position:absolute;inset:0}.scene-mount canvas{width:100%;height:100%;display:block}.scene-topbar{z-index:3;pointer-events:none;justify-content:space-between;align-items:flex-start;gap:12px;display:flex;position:absolute;top:18px;left:18px;right:18px}.scene-topbar>*{pointer-events:auto}.topbar-group{flex-wrap:wrap;gap:8px;display:flex}.camera-caption{border:1px solid var(--line);max-width:min(520px,100% - 36px);color:var(--muted);box-shadow:0 12px 35px var(--shadow);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#080d16bf;border-radius:18px;padding:12px 16px;position:absolute;bottom:18px;left:18px}.side-pane{z-index:5;border-left:1px solid var(--line);background:linear-gradient(#0a111df5,#0a0f18fa);flex-direction:column;grid-area:side;gap:12px;min-height:0;padding:16px 18px;display:flex;position:relative;overflow:auto}.play-band{z-index:5;border-top:1px solid var(--line);background:linear-gradient(#0a111df5,#0a0f18fa);grid-area:band;grid-template-columns:minmax(220px,.85fr) minmax(240px,1fr) minmax(360px,1.7fr);grid-template-areas:"target lesson keyboard";gap:10px;min-height:0;padding:14px 18px 16px;display:grid;position:relative;overflow:auto;box-shadow:0 -22px 60px #00000047}body[data-layout=side] .play-band{border-top:0;border-left:1px solid 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