:root {
  --bg: #f1f5f9;
  --card: #fff;
  --primary: #2563eb;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --danger: #ef4444;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); text-decoration: none; }
.hidden { display: none !important; }
.error { color: var(--danger); font-size: 14px; }

.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-card { background: var(--card); padding: 40px; border-radius: 12px; width: 360px; box-shadow: 0 4px 24px rgba(0,0,0,.08); }
.login-card h1 { margin: 0 0 4px; }
.subtitle { color: var(--muted); margin: 0 0 24px; }
.login-card label { display: block; margin-bottom: 16px; font-size: 14px; }
.login-card input { width: 100%; margin-top: 6px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; }

.layout { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: #0f172a; color: #94a3b8; padding: 20px 0; flex-shrink: 0; }
.sidebar .brand { color: #fff; font-weight: 600; padding: 0 20px 20px; }
.sidebar a { display: block; padding: 10px 20px; color: inherit; }
.sidebar a:hover, .sidebar a.active { background: #1e293b; color: #fff; }
.sidebar .logout { margin-top: 40px; }

.content { flex: 1; padding: 32px; overflow: auto; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.hint { color: var(--muted); font-size: 14px; margin-bottom: 20px; }

.btn { padding: 8px 16px; border: 1px solid var(--border); border-radius: 6px; background: var(--card); cursor: pointer; font-size: 14px; }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.small { padding: 4px 10px; font-size: 12px; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; margin-bottom: 32px; }
.card { background: var(--card); padding: 20px; border-radius: 8px; border: 1px solid var(--border); }
.card .label { display: block; color: var(--muted); font-size: 13px; }
.card .value { font-size: 28px; font-weight: 600; }

.panel { background: var(--card); padding: 24px; border-radius: 8px; border: 1px solid var(--border); }
.panel ul { margin: 0; padding-left: 20px; line-height: 1.8; }

.table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 8px; overflow: hidden; }
.table th, .table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.table th { background: #f8fafc; font-weight: 600; }

.config-group { background: var(--card); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 20px; padding: 16px 20px; }
.config-group h3 { margin: 0 0 12px; font-size: 16px; }
.config-row { display: flex; align-items: center; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.config-row:last-child { border-bottom: none; }
.config-row .key { flex: 1; font-family: monospace; font-size: 13px; }
.config-row .desc { flex: 2; color: var(--muted); font-size: 13px; }
.config-row input[type="text"], .config-row input[type="number"] { width: 160px; padding: 6px 10px; border: 1px solid var(--border); border-radius: 4px; }

dialog { border: none; border-radius: 12px; padding: 24px; min-width: 400px; box-shadow: 0 8px 32px rgba(0,0,0,.15); }
dialog label { display: block; margin-bottom: 12px; font-size: 14px; }
dialog input { width: 100%; margin-top: 4px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; }
dialog .checkbox { display: flex; align-items: center; gap: 8px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px; }
.badge.on { background: #dcfce7; color: #166534; }
.badge.off { background: #fee2e2; color: #991b1b; }