:root {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --card: #1e293b;
  --card-hover: #334155;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #a78bfa;
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --border: rgba(148, 163, 184, 0.2);
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body, #root { margin: 0; min-height: 100%; }
body {
  background: radial-gradient(1200px 600px at 10% -10%, #1d4ed8 0%, transparent 50%),
              radial-gradient(900px 500px at 100% 0%, #7c3aed 0%, transparent 45%),
              var(--bg);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
button, input, textarea, select {
  font: inherit;
}
.app-shell { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar {
  background: rgba(15, 23, 42, 0.85);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  backdrop-filter: blur(10px);
  position: sticky; top: 0; height: 100vh; overflow: auto;
}
.brand { display: flex; gap: 12px; align-items: center; margin-bottom: 28px; padding: 0 8px; }
.brand-badge {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; font-weight: 700; color: #0f172a;
}
.brand h1 { font-size: 16px; margin: 0; }
.brand p { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.nav { display: flex; flex-direction: column; gap: 6px; }
.nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; border-radius: 12px; color: var(--muted);
  border: 1px solid transparent; transition: .15s ease;
}
.nav a:hover { background: var(--card-hover); color: var(--text); }
.nav a.active {
  background: linear-gradient(135deg, rgba(56,189,248,.18), rgba(167,139,250,.18));
  color: var(--text); border-color: rgba(56,189,248,.35);
}
.nav .icon { width: 22px; text-align: center; }
.main { padding: 28px 32px 48px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; gap: 16px; flex-wrap: wrap; }
.topbar h2 { margin: 0; font-size: 28px; }
.topbar .meta { color: var(--muted); font-size: 14px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 999px; background: rgba(52,211,153,.12);
  color: var(--ok); border: 1px solid rgba(52,211,153,.3); font-size: 13px;
}
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.card {
  background: rgba(30, 41, 59, 0.9); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow);
  transition: .15s ease;
}
.card:hover { transform: translateY(-2px); border-color: rgba(56,189,248,.4); }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
.card .actions { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
  appearance: none; border: none; cursor: pointer;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  color: #0f172a; font-weight: 700; padding: 10px 14px; border-radius: 10px;
}
.btn.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); font-weight: 600; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.panel {
  background: rgba(30, 41, 59, 0.92); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
}
.panel + .panel { margin-top: 16px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.stack { display: flex; flex-direction: column; gap: 12px; }
label { font-size: 13px; color: var(--muted); }
input, textarea, select {
  width: 100%; background: #0f172a; color: var(--text);
  border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px;
}
textarea { min-height: 100px; resize: vertical; }
.video-wrap {
  position: relative; background: #020617; border-radius: 14px; overflow: hidden;
  aspect-ratio: 16/10; border: 1px solid var(--border); display: grid; place-items: center;
}
.video-wrap video, .video-wrap canvas { width: 100%; height: 100%; object-fit: cover; }
.video-wrap .placeholder { color: var(--muted); text-align: center; padding: 24px; }
.badge {
  display: inline-block; padding: 4px 8px; border-radius: 8px; font-size: 12px;
  background: rgba(56,189,248,.15); color: var(--accent);
}
.stat { font-size: 28px; font-weight: 700; }
.muted { color: var(--muted); }
.pre {
  background: #020617; border-radius: 12px; padding: 12px; overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px; border: 1px solid var(--border); white-space: pre-wrap;
}
.alert {
  padding: 12px 14px; border-radius: 12px; border: 1px solid rgba(251,191,36,.35);
  background: rgba(251,191,36,.1); color: #fde68a; font-size: 14px;
}
.alert.ok { border-color: rgba(52,211,153,.35); background: rgba(52,211,153,.1); color: #a7f3d0; }
.steps { margin: 0; padding-left: 18px; color: var(--muted); }
.steps li { margin: 6px 0; }
.kpi { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.kpi .card { padding: 14px; }
@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; }
  .main { padding: 20px 16px 40px; }
}