:root,
[data-theme="light"] {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --surface-2: #f1efe9;
  --border: #d8d4cc;
  --text: #28251d;
  --text-muted: #6f6a62;
  --primary: #01696f;
  --primary-hover: #0c4e54;
  --danger: #a13544;
  --danger-hover: #7d2733;
  --success: #437a22;
  --shadow: 0 8px 24px rgba(0,0,0,.08);
}

[data-theme="dark"] {
  --bg: #171614;
  --surface: #1d1c1a;
  --surface-2: #252320;
  --border: #393836;
  --text: #d8d5cf;
  --text-muted: #a09b94;
  --primary: #4f98a3;
  --primary-hover: #227f8b;
  --danger: #d16373;
  --danger-hover: #b84f61;
  --success: #6daa45;
  --shadow: 0 8px 24px rgba(0,0,0,.28);
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, sans-serif; background: var(--bg); color: var(--text); }
.shell { min-height: 100vh; display: grid; grid-template-columns: 280px 1fr; }
.sidebar { background: var(--surface); border-right: 1px solid var(--border); padding: 24px; }
.brand { display: flex; gap: 14px; align-items: center; margin-bottom: 28px; }
.brand-logo { width: 44px; height: 44px; border-radius: 10px; background: var(--primary); color: #fff; display: grid; place-items: center; font-weight: bold; }
.brand h1 { margin: 0; font-size: 20px; }
.brand p { margin: 4px 0 0; color: var(--text-muted); font-size: 14px; }
.sidebar-box { background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.sidebar-box p { margin: 8px 0 0; color: var(--text-muted); font-size: 14px; }
.main { padding: 24px; }
.topbar { display: flex; justify-content: space-between; gap: 20px; align-items: center; margin-bottom: 24px; }
.topbar h2 { margin: 0 0 6px; }
.topbar p { margin: 0; color: var(--text-muted); }
.topbar-actions { display: flex; gap: 10px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); }
.stat-card { padding: 18px; }
.stat-label { display: block; font-size: 14px; color: var(--text-muted); margin-bottom: 8px; }
.stat-value { font-size: 28px; }
.layout-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; }
.section-head { padding: 18px 18px 0; }
.section-head h3 { margin: 0 0 6px; }
.section-head p { margin: 0; color: var(--text-muted); font-size: 14px; }
.table-wrap { overflow: auto; padding: 18px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--text-muted); font-weight: 600; }
.form-block { display: grid; gap: 10px; padding: 0 18px 18px; }
label { font-size: 14px; color: var(--text-muted); }
input, select, button { font: inherit; }
input, select { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); }
.btn { border: 0; border-radius: 8px; padding: 11px 14px; cursor: pointer; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.badge { display: inline-block; padding: 5px 9px; border-radius: 999px; font-size: 12px; }
.badge-online { background: rgba(67, 122, 34, .14); color: var(--success); }
.badge-offline { background: rgba(161, 53, 68, .14); color: var(--danger); }
.log-box { margin: 0 18px 18px; padding: 12px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; font-size: 13px; color: var(--text-muted); min-height: 56px; }
@media (max-width: 1024px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .stats, .layout-grid { grid-template-columns: 1fr; }
}