:root {
  --bg: #0f1216;
  --panel: #171b21;
  --panel-2: #1e232b;
  --border: #2a303a;
  --text: #eef1f5;
  --muted: #9aa4b2;
  --accent: #ff5a1f;
  --accent-2: #ffb020;
  --ok: #35c470;
  --warn: #ffb020;
  --danger: #ff4d4f;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent-2); }
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px; flex-shrink: 0; background: var(--panel);
  border-right: 1px solid var(--border); padding: 20px 0;
}
.sidebar .brand {
  padding: 0 20px 20px; font-weight: 800; font-size: 18px;
  letter-spacing: -0.02em; border-bottom: 1px solid var(--border); margin-bottom: 12px;
}
.sidebar .brand span { color: var(--accent); }
.sidebar nav a {
  display: flex; align-items: center; gap: 10px; padding: 10px 20px;
  color: var(--muted); text-decoration: none; font-size: 14px;
}
.sidebar nav a.active { color: var(--text); background: var(--panel-2); border-right: 3px solid var(--accent); }
.main { flex: 1; min-width: 0; }
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 24px; border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 20px; margin: 0; }
.content { padding: 24px; max-width: 1100px; }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; margin-bottom: 18px;
}
.card-header { font-weight: 700; margin-bottom: 12px; display: flex; justify-content: space-between; align-items: center; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat-card .stat-value { font-size: 28px; font-weight: 800; }
.stat-card .stat-label { color: var(--muted); font-size: 13px; margin-top: 4px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
.btn {
  display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); padding: 8px 14px; border-radius: 8px;
  cursor: pointer; font-size: 14px; text-decoration: none;
}
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn-danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.form-group { margin-bottom: 12px; }
.form-group label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); padding: 9px 10px; font-size: 14px;
}
.form-row { display: flex; gap: 12px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 140px; }
.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-success { background: rgba(53,196,112,.15); color: var(--ok); }
.badge-warning { background: rgba(255,176,32,.15); color: var(--warn); }
.badge-danger { background: rgba(255,77,79,.15); color: var(--danger); }
.badge-info { background: rgba(255,90,31,.15); color: var(--accent); }
.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.alert-error { background: rgba(255,77,79,.12); color: var(--danger); border: 1px solid rgba(255,77,79,.3); }
.alert-success { background: rgba(53,196,112,.12); color: var(--ok); border: 1px solid rgba(53,196,112,.3); }
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-box { width: 320px; }
.slot-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.slot-btn {
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  padding: 8px 12px; border-radius: 8px; cursor: pointer; font-size: 13px; font-variant-numeric: tabular-nums;
}
.slot-btn:hover { border-color: var(--accent); }
.slot-btn.taken { opacity: .35; text-decoration: line-through; cursor: not-allowed; }