:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --border: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --ok: #4ade80;
  --warn: #fde047;
  --danger: #f87171;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; font: 14px/1.45 system-ui, -apple-system, sans-serif; background: var(--bg); color: var(--text); }
#app { display: grid; grid-template-columns: 340px 1fr; height: 100vh; }
#sidebar { background: var(--panel); border-right: 1px solid var(--border); overflow-y: auto; }
.sidebar-head { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border); }
.sidebar-head h1 { margin: 0; font-size: 18px; }
.home-link { text-decoration: none; font-size: 22px; }
.panel { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.panel h2 { margin: 0 0 8px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; font-size: 13px; }
.field span, .muted { color: var(--muted); font-size: 12px; }
.poly-block { border: 1px solid var(--border); border-radius: 6px; padding: 8px; margin-bottom: 8px; background: #0f172a; }
.poly-block summary { cursor: pointer; color: var(--muted); font-size: 12px; }
.check { display: flex; align-items: center; gap: 8px; margin: 6px 0; font-size: 13px; }
input, textarea, button { font: inherit; color: var(--text); background: #0f172a; border: 1px solid var(--border); border-radius: 6px; padding: 8px 10px; }
textarea { min-height: 72px; resize: vertical; }
button { width: 100%; cursor: pointer; background: #0369a1; border-color: #0284c7; font-weight: 600; margin-top: 8px; }
button:disabled { opacity: 0.5; cursor: wait; }
.btn-secondary { background: #334155; border-color: var(--border); font-weight: 500; width: auto; flex: 1; }
.row { display: flex; gap: 8px; }
.link { display: inline-block; margin: 8px 0; color: var(--accent); font-size: 13px; }
.inbox ul { margin: 8px 0 0; padding-left: 18px; font-size: 12px; color: var(--muted); }
.track-row { display: grid; grid-template-columns: 1fr 52px; gap: 8px; margin-bottom: 8px; align-items: end; }
.status { font-size: 13px; color: var(--muted); }
#main { overflow-y: auto; padding: 16px 20px 40px; }
.intro { color: var(--muted); max-width: 52rem; }
.msg { padding: 8px 12px; border-radius: 6px; margin: 8px 0; }
.msg.error { background: rgba(248,113,113,.12); border: 1px solid var(--danger); }
.msg.warn { background: rgba(253,224,71,.12); border: 1px solid var(--warn); color: #fef9c3; }
.msg.ok { background: rgba(74,222,128,.1); border: 1px solid var(--ok); }
.exports button { width: auto; background: #334155; }
#video { width: 100%; max-height: 75vh; background: #111; border-radius: 8px; border: 1px solid var(--border); }
.attrib { text-align: right; color: var(--muted); font-size: 11px; }
@media (max-width: 900px) {
  #app { grid-template-columns: 1fr; height: auto; min-height: 100vh; }
}