:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#07111f;--panel:#0c1627d1;--border:#94a3b82e;--text:#e5eefb;--muted:#94a3b8;--accent:#22c55e}*{box-sizing:border-box}body{background:radial-gradient(circle at top, #102447 0%, var(--bg) 48%, #030712 100%);color:var(--text);min-height:100vh;margin:0;font-family:Inter,system-ui,sans-serif}.app{grid-template-columns:1.15fr .85fr;gap:24px;max-width:1200px;margin:0 auto;padding:24px;display:grid}.panel{background:var(--panel);border:1px solid var(--border);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-radius:24px;box-shadow:0 24px 80px #00000059}.viewer{padding:18px}.stage{aspect-ratio:4/3;background:#020617;border-radius:18px;width:100%;position:relative;overflow:hidden}video,canvas{object-fit:cover;width:100%;height:100%;position:absolute;inset:0;transform:scaleX(-1)}.hud{flex-wrap:wrap;gap:12px;margin-top:16px;display:flex}.badge{border:1px solid var(--border);background:#0f172ab8;border-radius:999px;padding:10px 14px;font-size:14px}.side{flex-direction:column;gap:20px;padding:26px;display:flex}h1{margin:0;font-size:clamp(28px,4vw,42px);line-height:1.05}p{color:var(--muted);margin:0;line-height:1.65}.gesture-card{background:linear-gradient(135deg,#22c55e29,#38bdf81f);border:1px solid #38bdf82e;border-radius:18px;padding:18px}.gesture-label{color:var(--muted);margin-bottom:8px;font-size:14px}.gesture-value{font-size:clamp(30px,5vw,52px);font-weight:700}.confidence{color:#86efac;margin-top:8px;font-weight:600}.tips{gap:12px;display:grid}.tip{border:1px solid var(--border);background:#0f172abf;border-radius:16px;padding:14px 16px}.tip strong{color:#fff;margin-bottom:6px;display:block}.controls{flex-wrap:wrap;gap:12px;display:flex}button{font:inherit;cursor:pointer;border:0;border-radius:999px;padding:12px 18px;font-weight:600}button.primary{background:linear-gradient(135deg, var(--accent), #16a34a);color:#fff}button.secondary{border:1px solid var(--border);color:var(--text);background:#0f172ae6}.status{color:var(--muted);white-space:pre-wrap;font-size:14px}.status.error{color:#fdba74}@media (width<=920px){.app{grid-template-columns:1fr}}