:root {
  --bg: #f5f7fb; --card: #fff; --text: #172033; --muted: #667085;
  --line: #e4e9f2; --primary: #1668dc; --ok: #17843f; --warn: #b25e09; --err: #b42318;
}
* { box-sizing: border-box; }
body { margin:0; font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif; background:var(--bg); color:var(--text); }
header { display:flex; justify-content:space-between; align-items:center; padding:14px 24px; background:#fff; border-bottom:1px solid var(--line); position:sticky; top:0; z-index:10; }
header nav a { margin-left:18px; color:var(--primary); text-decoration:none; }
.help-btn { margin-left:14px; width:26px; height:26px; padding:0; border-radius:50%; background:#e8f1ff; color:var(--primary); font-weight:800; }
main { padding:24px; max-width:1400px; margin:auto; }
.card { background:var(--card); border:1px solid var(--line); border-radius:14px; padding:24px; }
.narrow { max-width:420px; margin:8vh auto; }
.hidden { display:none !important; }
.muted { color:var(--muted); }
.error { color:var(--err); }
label { display:block; margin-bottom:14px; font-weight:600; }
input { width:100%; padding:10px; margin-top:6px; border:1px solid var(--line); border-radius:8px; font-size:15px; }
button { padding:9px 16px; border:0; border-radius:8px; background:var(--primary); color:#fff; cursor:pointer; font-size:14px; }
button.secondary { background:#eef2f6; color:var(--text); }
button.active { background:var(--primary); color:#fff; }
button:disabled { opacity:.5; cursor:not-allowed; }
button.danger { background:#b42318; }
.toolbar { display:flex; justify-content:space-between; gap:12px; margin-bottom:16px; }
.tabs { display:flex; gap:6px; flex-wrap:wrap; }
.tab { background:#eef2f6; color:var(--text); }
.tab.active { background:var(--primary); color:#fff; }
.patient-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:14px; }
.patient-card { background:#fff; border:1px solid var(--line); border-radius:12px; padding:16px; }
.patient-card h3 { margin:0 0 8px; }
.pill { display:inline-block; padding:3px 9px; border-radius:999px; font-size:12px; background:#eef2f6; color:var(--muted); margin-right:6px; }
.pill.blue { background:#e8f1ff; color:var(--primary); }
.pill.green { background:#e8f7ee; color:var(--ok); }
.pill.orange { background:#fff3e0; color:var(--warn); }
.workspace { display:grid; grid-template-columns:280px 1fr; gap:18px; }
#media-list { background:#fff; border:1px solid var(--line); border-radius:12px; padding:12px; max-height:calc(100vh - 130px); overflow:auto; }
.media-item { padding:9px; border-radius:8px; cursor:pointer; display:flex; gap:8px; align-items:center; font-size:14px; word-break:break-all; }
.media-item:hover { background:#f4f7fb; }
.media-item.active { background:#e8f1ff; color:var(--primary); }
.media-item.done::after { content:"✓"; margin-left:auto; color:var(--ok); }
.annotator { position:relative; background:#fff; border:1px solid var(--line); border-radius:12px; padding:16px 196px 16px 16px; }
#annotator-title { display:flex; justify-content:space-between; gap:12px; align-items:center; margin-bottom:10px; flex-wrap:wrap; }
.canvas-wrap { position:relative; background:#0b0f16; border-radius:10px; overflow:hidden; user-select:none; touch-action:none; min-height:120px; }
.canvas-wrap.pan-mode { cursor:grab; }
.canvas-wrap.pan-mode:active { cursor:grabbing; }
#media-stage { position:relative; transform-origin:0 0; width:100%; }
#base-image { display:block; width:100%; user-select:none; -webkit-user-drag:none; }
.rect { position:absolute; border:2px solid #ff4d4f; background:rgba(255,77,79,.12); cursor:move; }
.roi-overlay { position:absolute; inset:0; width:100%; height:100%; pointer-events:none; overflow:visible; }
#roi-polygon { fill:rgba(255,77,79,.16); stroke:#ff4d4f; stroke-width:2; vector-effect:non-scaling-stroke; }
#roi-polygon.roi-draft { fill:rgba(255,77,79,.08); stroke-dasharray:7 5; opacity:.78; }
.handle { position:absolute; width:12px; height:12px; background:#fff; border:2px solid #ff4d4f; border-radius:50%; }
.handle.nw { left:-7px; top:-7px; cursor:nwse-resize; }
.handle.ne { right:-7px; top:-7px; cursor:nesw-resize; }
.handle.sw { left:-7px; bottom:-7px; cursor:nesw-resize; }
.handle.se { right:-7px; bottom:-7px; cursor:nwse-resize; }
#video-strip { display:flex; gap:8px; overflow-x:auto; margin-top:12px; }
.frame-thumb { width:120px; border:2px solid transparent; border-radius:6px; cursor:pointer; }
.frame-thumb.active { border-color:var(--primary); }
.tool-panel { position:absolute; top:16px; right:16px; width:164px; padding-left:14px; border-left:1px solid var(--line); display:flex; flex-direction:column; gap:12px; }
.tool-group { display:flex; flex-direction:column; gap:6px; }
.tool-group > span { font-size:11px; color:var(--muted); font-weight:700; letter-spacing:.08em; text-transform:uppercase; }
.tool-panel button { width:100%; text-align:left; padding:8px 10px; }
.zoom-row { display:grid; grid-template-columns:34px 1fr 34px; gap:4px; align-items:center; }
.zoom-row button { text-align:center; padding:7px; }
.zoom-level { align-self:center; min-width:44px; text-align:center; color:var(--muted); font-size:13px; }
.readonly-note { color:var(--warn); margin:10px 0 0; }
.tic-panel { margin-top:14px; border-top:1px solid var(--line); padding-top:14px; }
.tic-panel > div { display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
#tic-chart { display:block; width:100%; height:220px; margin-top:8px; background:#fbfdff; border:1px solid var(--line); border-radius:8px; }
#annotator-message { min-height:22px; margin:8px 0 0; }
.tour-overlay { position:fixed; inset:0; z-index:2000; background:rgba(17,29,48,.52); }
.tour-spotlight { position:fixed; border:2px solid #76b7ff; border-radius:10px; box-shadow:0 0 0 9999px rgba(17,29,48,.52),0 0 0 6px rgba(118,183,255,.22); transition:all .18s ease; pointer-events:none; }
.tour-card { position:fixed; z-index:2002; width:min(370px,calc(100vw - 32px)); padding:18px; background:#fff; border-radius:14px; box-shadow:0 18px 48px rgba(8,20,42,.25); }
.tour-card-head { display:flex; justify-content:space-between; color:var(--primary); font-size:13px; font-weight:700; }
.tour-close { padding:0; width:24px; height:24px; border-radius:50%; background:transparent; color:var(--muted); font-size:22px; line-height:1; }
.tour-card h2 { margin:12px 0 8px; font-size:18px; }.tour-card p { margin:0; line-height:1.55; }.tour-safe { margin-top:10px !important; padding:8px; border-radius:8px; background:#fff7e8; color:#8a5300; font-size:12px; }
.tour-actions { display:grid; grid-template-columns:auto 1fr auto auto; gap:8px; margin-top:16px; }.tour-actions button { padding:8px 11px; }
.tour-focus { position:relative !important; z-index:2001 !important; box-shadow:0 0 0 4px rgba(118,183,255,.35) !important; }
@media (max-width: 1050px) { .workspace { grid-template-columns:1fr; } #media-list { max-height:240px; } .annotator { padding:16px; } .tool-panel { position:static; width:auto; border-left:0; border-top:1px solid var(--line); padding:14px 0 0; margin-top:14px; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); } .danger-group { grid-column:1/-1; } }