:root {
  --bg: #0b0d10;
  --bar: #14181d;
  --fg: #e8ebef;
  --muted: #8a939e;
  --line: #252b33;
  --accent: #4cc2ff;
  --accent-2: #ffb347;
  --danger: #ff6b6b;
  --ok: #5ddc8a;
  --radius: 8px;
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; background: var(--bg); color: var(--fg); overflow: hidden; }
button, select, input { font: inherit; color: inherit; }
button { cursor: pointer; }
h2, h3 { margin: 0; font-weight: 600; }

#app { height: 100%; display: grid; grid-template-rows: auto 1fr; }

/* ---------- top bar ---------- */
#topbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 8px 12px; background: var(--bar); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; letter-spacing: .5px; font-size: 18px; color: var(--accent); }
.brand span { color: var(--fg); font-weight: 300; margin-left: 4px; }
.field { display: flex; align-items: center; gap: 6px; min-width: 0; }
.field-label { color: var(--muted); font-size: 13px; white-space: nowrap; }
select {
  background: #1d232a; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 6px 28px 6px 10px; max-width: 46vw; text-overflow: ellipsis;
  appearance: none; -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 14px) 55%, calc(100% - 9px) 55%;
  background-size: 5px 5px, 5px 5px; background-repeat: no-repeat;
}
select:focus { outline: 1px solid var(--accent); }
.icon-btn {
  background: transparent; border: 1px solid var(--line); border-radius: var(--radius);
  width: 32px; height: 32px; color: var(--muted);
}
.icon-btn:hover { color: var(--fg); border-color: var(--muted); }
.pill {
  background: #1d232a; border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 12px; color: var(--fg); position: relative;
}
.pill:hover { border-color: var(--muted); }
.pill.active { background: var(--accent); color: #06202e; border-color: var(--accent); font-weight: 600; }
.badge {
  display: inline-block; min-width: 18px; padding: 0 5px; margin-left: 4px;
  background: var(--accent-2); color: #2b1a00; border-radius: 999px; font-size: 11px; font-weight: 700; line-height: 18px;
}
.badge[hidden] { display: none; }
.info { margin-left: auto; color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.info b { color: var(--fg); font-weight: 600; }
.tag { display: inline-block; padding: 1px 6px; border-radius: 4px; background: #27313b; color: var(--fg); font-size: 11px; margin-left: 6px; }
.tag.sph { background: #123a4c; color: var(--accent); }

/* ---------- stage ---------- */
#stage { position: relative; background: #000; overflow: hidden; outline: none; user-select: none; -webkit-user-select: none; }
#gl, #video { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
#gl { touch-action: none; cursor: grab; }
#gl.dragging { cursor: grabbing; }
#video { object-fit: contain; background: #000; }
#stage.flat #gl { display: none; }
#stage:not(.flat) #video { opacity: 0; pointer-events: none; width: 1px; height: 1px; }

.hint {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,.55); color: #ddd; font-size: 12px; padding: 6px 12px; border-radius: 999px;
  pointer-events: none; transition: opacity .4s; backdrop-filter: blur(4px);
}
.spinner {
  position: absolute; left: 50%; top: 50%; width: 44px; height: 44px; margin: -22px 0 0 -22px;
  border: 3px solid rgba(255,255,255,.2); border-top-color: var(--accent); border-radius: 50%;
  animation: spin .8s linear infinite; pointer-events: none;
}
.spinner[hidden] { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.big-play {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%);
  width: 84px; height: 84px; border-radius: 50%; border: 0;
  background: rgba(20,24,29,.75); color: #fff; font-size: 34px; padding-left: 8px;
  box-shadow: 0 6px 30px rgba(0,0,0,.5); backdrop-filter: blur(6px);
}
.big-play:hover { background: var(--accent); color: #06202e; }
.big-play[hidden] { display: none; }

.toast {
  position: absolute; left: 50%; bottom: 84px; transform: translateX(-50%);
  background: #1d232a; border: 1px solid var(--line); color: var(--fg);
  padding: 10px 14px; border-radius: var(--radius); font-size: 14px; max-width: min(90vw, 520px);
  display: flex; gap: 12px; align-items: center; box-shadow: 0 8px 30px rgba(0,0,0,.5); z-index: 5;
}
.toast[hidden] { display: none; }
.toast.error { border-color: var(--danger); }
.toast button { background: var(--accent); color: #06202e; border: 0; border-radius: 6px; padding: 4px 10px; font-weight: 600; white-space: nowrap; }

/* ---------- player controls ---------- */
.controls {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 24px 14px 10px;
  background: linear-gradient(to top, rgba(0,0,0,.8), rgba(0,0,0,0));
  transition: opacity .25s; z-index: 3;
}
#stage.idle .controls, #stage.idle .hint { opacity: 0; pointer-events: none; }
#stage.idle #gl { cursor: none; }
.row { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.spacer { flex: 1; }
.ctl { background: transparent; border: 0; color: #fff; font-size: 18px; width: 36px; height: 36px; border-radius: 6px; }
.ctl:hover { background: rgba(255,255,255,.12); }
.time { font-variant-numeric: tabular-nums; font-size: 13px; color: #ddd; }
.ctl-select { background: rgba(255,255,255,.1); border: 0; border-radius: 6px; padding: 4px 22px 4px 8px; font-size: 13px; }
.vol { width: 90px; accent-color: var(--accent); }

#seek {
  --played: 0%; --buffered: 0%;
  width: 100%; height: 6px; appearance: none; -webkit-appearance: none; background: transparent; cursor: pointer; margin: 0;
}
#seek::-webkit-slider-runnable-track {
  height: 6px; border-radius: 3px;
  background: linear-gradient(to right, var(--accent) var(--played), rgba(255,255,255,.45) var(--played), rgba(255,255,255,.45) var(--buffered), rgba(255,255,255,.18) var(--buffered));
}
#seek::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px; border-radius: 50%; background: #fff; margin-top: -4px;
  box-shadow: 0 0 0 2px rgba(0,0,0,.3);
}
#seek::-moz-range-track {
  height: 6px; border-radius: 3px;
  background: linear-gradient(to right, var(--accent) var(--played), rgba(255,255,255,.45) var(--played), rgba(255,255,255,.45) var(--buffered), rgba(255,255,255,.18) var(--buffered));
}
#seek::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 0; }

/* ---------- side panel ---------- */
.panel {
  position: fixed; top: 0; right: 0; bottom: 0; width: min(420px, 100vw);
  background: var(--bar); border-left: 1px solid var(--line); z-index: 20;
  display: flex; flex-direction: column; box-shadow: -10px 0 40px rgba(0,0,0,.5);
}
.panel[hidden] { display: none; }
.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.panel-body { padding: 14px 16px; overflow: auto; flex: 1; }
.panel-body h3 { font-size: 14px; margin: 10px 0 8px; word-break: break-all; }
.panel-section-head { display: flex; align-items: center; justify-content: space-between; margin-top: 22px; }
.muted { color: var(--muted); font-size: 12px; margin: 0 0 8px; }
.link-btn { background: none; border: 0; color: var(--accent); font-size: 12px; padding: 0; }
.link-btn:hover { text-decoration: underline; }

.variant, .job {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; margin-bottom: 8px; background: #10141a;
}
.variant .top, .job .top { display: flex; align-items: center; gap: 8px; }
.variant .name, .job .name { font-weight: 600; }
.variant .meta, .job .meta { color: var(--muted); font-size: 12px; margin-top: 3px; word-break: break-all; }
.variant .actions, .job .actions { margin-left: auto; display: flex; gap: 6px; }
.btn {
  background: #1d232a; border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px; font-size: 13px;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); color: #06202e; border-color: var(--accent); font-weight: 600; }
.btn.danger { color: var(--danger); }
.btn.sm { padding: 2px 8px; font-size: 12px; }
.status { font-size: 12px; padding: 1px 7px; border-radius: 999px; background: #27313b; white-space: nowrap; }
.status.ready, .status.done { background: #153f2a; color: var(--ok); }
.status.running { background: #123a4c; color: var(--accent); }
.status.queued { background: #3d3117; color: var(--accent-2); }
.status.error { background: #4a1d1d; color: var(--danger); }
.bar { height: 6px; background: #232a33; border-radius: 3px; margin-top: 8px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .3s; }
.job .err { color: var(--danger); font-size: 12px; margin-top: 4px; word-break: break-all; }
.empty { color: var(--muted); font-size: 13px; padding: 6px 0; }

@media (max-width: 760px) {
  #topbar { gap: 8px; padding: 6px 8px; }
  .brand, .info, .field-label, .hint, .vol, #resetBtn { display: none; }
  select { max-width: 40vw; }
}