:root {
  --bg:#0b1020;--panel:#111827;--panel-2:#182235;--line:#2b374d;
  --text:#f8fafc;--muted:#a9b4c7;--accent:#38bdf8;--accent-2:#0ea5e9;
  --upper:#22c55e;--lower:#ef4444;--shadow:0 16px 50px rgba(0,0,0,.35)
}
*{box-sizing:border-box} html,body{margin:0;min-height:100%;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC",sans-serif}
body{background:var(--bg);color:var(--text)} button,select,input{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
.topbar{min-height:64px;padding:10px 18px;display:flex;align-items:center;justify-content:space-between;background:rgba(17,24,39,.98);border-bottom:1px solid var(--line)}
.brand{display:flex;gap:10px;align-items:center}.brand strong,.brand small{display:block}.brand small{color:var(--muted);margin-top:2px}
.brand-mark{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,#0ea5e9,#22c55e);color:#fff;font-size:28px;font-weight:800;box-shadow:var(--shadow)}
.brand-mark.small{width:40px;height:40px;border-radius:12px;font-size:20px}.header-actions{display:flex;align-items:center;gap:8px}.header-actions form{margin:0}
button,.ghost-link{border:0;border-radius:10px;padding:10px 13px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
button:disabled{opacity:.45;cursor:not-allowed}.primary{background:var(--accent-2);color:#fff;font-weight:700}.primary:hover{background:#0284c7}
.secondary{background:#334155;color:#fff;font-weight:700}.ghost,.ghost-link{background:transparent;color:var(--text);border:1px solid var(--line)}.wide{width:100%}
.login-page{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:min(420px,100%);background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--shadow);text-align:center}
.login-card .brand-mark{margin:auto}.login-card h1{margin-bottom:6px}.login-card p{color:var(--muted);margin-top:0}
.login-card form{display:grid;gap:15px;text-align:left;margin-top:24px}label{color:var(--muted);font-size:14px}
input,select{width:100%;margin-top:6px;padding:11px 12px;color:var(--text);background:#0f172a;border:1px solid var(--line);border-radius:9px}
.alert{padding:10px;border-radius:9px}.alert.error{color:#fecaca;background:rgba(239,68,68,.15)}
.app-page{height:100vh;overflow:hidden}.statusbar{min-height:50px;display:grid;grid-template-columns:160px 1fr auto auto;gap:14px;align-items:center;padding:7px 16px;background:var(--panel-2);border-bottom:1px solid var(--line);font-size:14px}
.statusbar label{display:flex;align-items:center;gap:8px}.statusbar select{margin:0;padding:7px}.filename{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:700}.save-state{color:var(--muted);min-width:100px;text-align:right}
.workspace{height:calc(100vh - 114px);display:grid;grid-template-columns:180px minmax(0,1fr) 210px}
.toolbar{background:var(--panel);padding:12px;overflow-y:auto;display:flex;flex-direction:column;gap:8px;border-color:var(--line)}
.toolbar.left{border-right:1px solid var(--line)}.toolbar.right{border-left:1px solid var(--line)}.toolbar hr{width:100%;border:0;border-top:1px solid var(--line);margin:5px 0}
.tool{background:#1e293b;color:var(--text);justify-content:flex-start;min-height:44px}.tool.active{outline:2px solid var(--accent);background:#26364c}.tool.upper.active{outline-color:var(--upper)}.tool.lower.active{outline-color:var(--lower)}.danger-lite{color:#fecaca}
.line-swatch{width:20px;height:4px;border-radius:10px;margin-right:8px}.line-swatch.upper{background:var(--upper)}.line-swatch.lower{background:var(--lower)}
.canvas-shell{position:relative;overflow:hidden;background:#050914;touch-action:none}#annotationCanvas{width:100%;height:100%;display:block;touch-action:none}
.loading-overlay{position:absolute;inset:0;display:grid;place-items:center;background:rgba(5,9,20,.75);font-weight:700}.loading-overlay.hidden{display:none}
.mode-pill{position:absolute;left:14px;top:14px;padding:7px 11px;background:rgba(15,23,42,.85);border:1px solid var(--line);border-radius:999px;font-size:13px;pointer-events:none}
.point-card{border-radius:12px;padding:13px;display:flex;justify-content:space-between}.upper-card{background:rgba(34,197,94,.13);border:1px solid rgba(34,197,94,.35)}.lower-card{background:rgba(239,68,68,.13);border:1px solid rgba(239,68,68,.35)}
.tip{color:var(--muted);line-height:1.55;font-size:14px;margin:5px 0 auto}.tip p{margin:7px 0}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,30px);padding:11px 16px;border-radius:10px;background:#e2e8f0;color:#0f172a;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.2s;max-width:min(520px,calc(100vw - 30px));z-index:999}
.toast.show{opacity:1;transform:translate(-50%,0)}.toast.error{background:#fecaca;color:#7f1d1d}.toast.success{background:#bbf7d0;color:#14532d}
dialog{width:min(520px,calc(100vw - 30px));border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--text);box-shadow:var(--shadow)}
dialog::backdrop{background:rgba(0,0,0,.6)}dialog li{margin:10px 0;line-height:1.5}
.admin-main{width:min(1200px,calc(100% - 28px));margin:22px auto;display:grid;gap:18px}.admin-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px;overflow:auto}.admin-card h2{margin-top:0}
.stats-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.stat{background:var(--panel-2);border-radius:12px;padding:15px}.stat strong{font-size:26px;display:block;margin:5px 0}.muted{color:var(--muted)}
.inline-form{display:grid;grid-template-columns:1fr 1fr 160px auto;gap:8px;margin-bottom:14px}.inline-form input,.inline-form select{margin:0}
table{width:100%;border-collapse:collapse;font-size:14px}th,td{padding:10px;border-bottom:1px solid var(--line);text-align:left}th{color:var(--muted)}.small-btn{padding:6px 9px;font-size:13px}
@media(max-width:900px){
  .app-page{height:100dvh}.statusbar{grid-template-columns:130px 1fr;min-height:76px;gap:5px 10px}.save-state{text-align:left}
  .workspace{height:calc(100dvh - 140px);grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr) auto}
  .toolbar.left,.toolbar.right{border:0;border-bottom:1px solid var(--line);padding:7px;flex-direction:row;overflow-x:auto;overflow-y:hidden;min-height:58px}
  .toolbar.right{border-top:1px solid var(--line);border-bottom:0}.toolbar hr,.toolbar .tip,.point-card{display:none}
  .tool{min-height:42px;min-width:max-content}.toolbar.right button{min-width:max-content;width:auto}.canvas-shell{min-height:0}
  .inline-form{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr}
}
@media(max-width:520px){.topbar{padding:8px 10px}.brand strong{font-size:14px}.brand small{font-size:11px}.statusbar{padding:5px 8px;font-size:12px}}

/* 所有檔案／自由選圖頁 */
.files-page { min-height: 100vh; }
.files-main {
  width: min(1480px, calc(100% - 28px));
  margin: 20px auto 36px;
}
.file-controls {
  display: grid;
  grid-template-columns: 170px minmax(220px, 1fr) 180px auto;
  gap: 10px;
  align-items: end;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 15px;
}
.file-controls input,
.file-controls select { margin-top: 6px; }
.file-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 10px;
}
.summary-chip {
  min-width: 112px;
  gap: 10px;
  justify-content: space-between;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
}
.summary-chip strong { font-size: 18px; }
.summary-chip.active {
  outline: 2px solid var(--accent);
  background: #203148;
}
.files-note {
  color: var(--muted);
  line-height: 1.7;
  margin: 8px 0 14px;
}
.status-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 9px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid transparent;
}
.status-unannotated {
  color: #bae6fd;
  background: rgba(14, 165, 233, .15);
  border-color: rgba(14, 165, 233, .35);
}
.status-draft {
  color: #fde68a;
  background: rgba(245, 158, 11, .15);
  border-color: rgba(245, 158, 11, .35);
}
.status-drawing {
  color: #fecaca;
  background: rgba(239, 68, 68, .17);
  border-color: rgba(239, 68, 68, .4);
}
.status-completed {
  color: #bbf7d0;
  background: rgba(34, 197, 94, .15);
  border-color: rgba(34, 197, 94, .38);
}
.files-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px;
}
.file-card {
  min-width: 0;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 15px;
}
.file-card.locked { opacity: .68; }
.file-thumb-wrap {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #050914;
}
.file-thumb {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}
.file-thumb-wrap .status-badge {
  position: absolute;
  top: 9px;
  left: 9px;
  backdrop-filter: blur(5px);
}
.file-card-body {
  display: grid;
  gap: 8px;
  padding: 12px;
}
.file-card-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lock-owner,
.redraw-hint {
  min-height: 18px;
  color: var(--muted);
  font-size: 13px;
}
.redraw-hint { color: #bbf7d0; }
.empty-state {
  grid-column: 1 / -1;
  min-height: 220px;
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--muted);
  background: var(--panel);
  border: 1px dashed var(--line);
  border-radius: 14px;
}
.error-text { color: #fecaca; }
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-top: 20px;
}

@media (max-width: 800px) {
  .files-main { width: min(100% - 16px, 1480px); margin-top: 10px; }
  .file-controls { grid-template-columns: 1fr 1fr; }
  .files-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
  .file-card-body { padding: 9px; }
}

@media (max-width: 520px) {
  .file-controls { grid-template-columns: 1fr; }
  .files-grid { grid-template-columns: 1fr; }
  .summary-chip { min-width: calc(50% - 4px); }
}