:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --ink: #e7e9ee;
  --muted: #9aa3b2;
  --line: #2a2f3a;
  --accent: #4f8cff;
  --accent-ink: #cfe0ff;
  --ok: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --radius: 10px;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f8; --panel: #ffffff; --panel-2: #f0f2f5;
    --ink: #1b1f27; --muted: #5b6472; --line: #e2e5ea;
    --accent: #2563eb; --accent-ink: #1d4ed8;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; background: var(--panel-2); padding: 1px 5px; border-radius: 5px; }

.topbar {
  position: sticky; top: 0; z-index: 5;
  padding: 14px 20px; background: var(--panel); border-bottom: 1px solid var(--line);
  display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.sub { color: var(--muted); font-size: 13px; }

.wrap { max-width: 920px; margin: 0 auto; padding: 22px 20px 60px; }

.dropzone {
  border: 2px dashed var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 40px 20px; text-align: center; cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone:focus, .dropzone.drag { border-color: var(--accent); background: var(--panel-2); outline: none; }
.drop-inner { display: grid; gap: 6px; }
.drop-inner strong { font-size: 17px; }
.drop-inner span { color: var(--muted); font-size: 13px; }

.hidden { display: none !important; }

.status { margin-top: 16px; padding: 12px 14px; border-radius: var(--radius); border: 1px solid var(--line); font-size: 14px; }
.status.full { border-color: rgba(52,211,153,.4); background: rgba(52,211,153,.08); }
.status.partial { border-color: rgba(251,191,36,.4); background: rgba(251,191,36,.08); }
.status.none { border-color: rgba(248,113,113,.4); background: rgba(248,113,113,.08); }

.editor { margin-top: 18px; display: grid; gap: 16px; }
.editor-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.file-name { font-weight: 600; }
.file-meta { color: var(--muted); font-size: 12px; }
.actions { display: flex; gap: 8px; }

.btn { border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 6px; }
.panel-head h2 { font-size: 15px; margin: 0; }
.hint { color: var(--muted); font-size: 12.5px; margin: 4px 0 12px; }
.filter, .toggle { font-size: 13px; }
.filter { background: var(--panel-2); border: 1px solid var(--line); color: var(--ink); border-radius: 8px; padding: 6px 10px; }
.toggle { color: var(--muted); display: flex; align-items: center; gap: 6px; cursor: pointer; }

/* Sliders */
.slider-row { display: grid; grid-template-columns: 1fr 200px 64px; align-items: center; gap: 12px; padding: 7px 0; border-top: 1px solid var(--line); }
.slider-row:first-child { border-top: none; }
.slider-row .name { font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.slider-row .name small { color: var(--muted); }
.slider-row input[type=range] { width: 100%; accent-color: var(--accent); }
.slider-row .val { text-align: right; font-variant-numeric: tabular-nums; }
.slider-row .val input { width: 60px; background: var(--panel-2); border: 1px solid var(--line); color: var(--ink); border-radius: 6px; padding: 4px 6px; text-align: right; font-variant-numeric: tabular-nums; }
.changed .name { color: var(--accent-ink); font-weight: 600; }

.master-row .name { font-size: 15px; font-weight: 600; }
.master-note { color: var(--warn); font-size: 12px; margin-top: 8px; min-height: 1em; }

.group { margin-top: 10px; }
.group > summary { cursor: pointer; font-size: 13px; color: var(--muted); padding: 6px 0; user-select: none; }
.group > summary::marker { color: var(--accent); }

/* Zones */
.zones { display: grid; grid-template-columns: 160px 1fr; gap: 20px; align-items: center; }
.speakermap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.speakermap .sp { background: var(--panel-2); border: 1px solid var(--line); border-radius: 6px; text-align: center; font-size: 11px; color: var(--muted); padding: 8px 0; }
.speakermap .ball { text-align: center; align-self: center; color: var(--accent); font-size: 18px; }
.speakermap .rc { border: none; background: transparent; }
.zone-sliders { display: grid; gap: 4px; }
@media (max-width: 560px) {
  .zones { grid-template-columns: 1fr; }
  .slider-row { grid-template-columns: 1fr 120px 56px; }
}

.summary { font-size: 13.5px; }
.summary .empty { color: var(--muted); }
.summary .chg { display: flex; justify-content: space-between; padding: 4px 0; border-top: 1px solid var(--line); }
.summary .chg:first-child { border-top: none; }
.summary .chg .to { color: var(--ok); font-variant-numeric: tabular-nums; }
.summary .chg .from { color: var(--muted); font-variant-numeric: tabular-nums; }

.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; border-top: 1px solid var(--line); }