:root{--bg:#f7f8fb;--panel:#fff;--panel-2:#f0f4f8;--text:#18202b;--muted:#657083;--line:#d9e1ea;--line-strong:#bcc8d6;--accent:#0f766e;--accent-2:#2563eb;--warn:#b45309;--danger:#b42318;--ok:#11845b;--shadow:0 18px 44px #141f2e14}*{box-sizing:border-box}html,body{background:var(--bg);min-height:100%;color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select{font:inherit}button{cursor:pointer;border:0}.app-shell{grid-template-columns:280px 1fr;min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--line);background:#fbfcfe;padding:22px}.brand{align-items:center;gap:10px;margin-bottom:24px;font-weight:750;display:flex}.brand-mark{background:linear-gradient(135deg,#0f766e,#2563eb);border-radius:8px;width:32px;height:32px}.sidebar-section{gap:10px;margin-bottom:24px;display:grid}.project-list{gap:8px;display:grid}.project-button{text-align:left;width:100%;color:var(--text);background:0 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0}.button:disabled{opacity:.55;cursor:not-allowed}.status-pill{background:var(--panel-2);min-height:26px;color:var(--muted);border-radius:999px;align-items:center;gap:6px;padding:3px 9px;font-size:12px;font-weight:750;display:inline-flex}.status-pill.completed{color:var(--ok);background:#ddf7ec}.status-pill.failed{color:var(--danger);background:#fee4e2}.status-pill.processing,.status-pill.queued{color:var(--accent-2);background:#e0ecff}.meter{background:#e8edf3;border-radius:999px;height:9px;overflow:hidden}.meter>span{background:linear-gradient(90deg, var(--accent), var(--accent-2));height:100%;transition:width .22s;display:block}.viewer-card{grid-template-rows:auto minmax(460px,1fr) auto;min-height:560px;display:grid}.review-stage{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:minmax(260px,.55fr) minmax(360px,1fr);min-height:460px;display:grid}.video-preview{border-right:1px solid var(--line);background:#0f172a;grid-template-rows:auto 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10px;font-size:12px;line-height:1.4;position:absolute;bottom:12px;left:12px;right:12px}.empty-video{color:#cbd5e1;place-items:center;min-height:414px;display:grid}.skeleton-stage{background:#eef3f7;min-height:460px}.viewer{background:#eef3f7;height:100%;min-height:460px;position:relative}.viewer canvas{width:100%;height:100%;display:block}.empty-viewer{height:100%;min-height:460px;color:var(--muted);place-items:center;display:grid}.timeline{gap:10px;padding:14px 16px;display:grid}.timeline input[type=range]{width:100%}.metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;display:grid}.demo-note,.engine-note{color:#7a4a06;background:#fff8e6;border:1px solid #f2d7a5;border-radius:8px;padding:10px 12px;font-size:13px;line-height:1.45}.engine-note{color:#0f604f;background:#eef9f4;border-color:#b8dccf}.metric{border:1px solid var(--line);background:#fbfcfe;border-radius:8px;padding:10px}.metric strong{font-size:18px;display:block}.metric 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