:root {
  color-scheme: dark;
  --bg: #000;
  --bg-1: #0b0b0d;
  --bg-2: #14141a;
  --fg: #e6e6ea;
  --fg-dim: #8a8a92;
  --border: #23232b;
  --accent: #4357d9;
  --ok: #2ecc71;
  --warn: #f1c40f;
  --err: #e74c3c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
}

body {
  display: grid;
  grid-template-columns: 220px 1fr;
}

a { color: inherit; text-decoration: none; }

.dim { color: var(--fg-dim); }

.nav {
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
}

.nav-brand {
  padding: 20px 16px 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--border);
}

.nav-items {
  display: flex;
  flex-direction: column;
  padding: 8px 0;
  flex: 1;
  overflow-y: auto;
}

.nav-items a {
  padding: 8px 16px;
  color: var(--fg-dim);
  border-left: 2px solid transparent;
  transition: color 0.1s, background 0.1s, border-color 0.1s;
}

.nav-items a:hover {
  color: var(--fg);
  background: var(--bg-2);
}

.nav-items a.active {
  color: var(--fg);
  background: var(--bg-2);
  border-left-color: var(--accent);
}

.nav-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
}

main {
  padding: 24px 32px;
  overflow-y: auto;
  height: 100vh;
}

h1 {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 20px;
  letter-spacing: 0.01em;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
}

.card-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
  margin-bottom: 8px;
}

.card-value {
  font-size: 22px;
  font-weight: 600;
}

.card-sub {
  font-size: 12px;
  color: var(--fg-dim);
  margin-top: 4px;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
}
.status-dot.ok  { background: var(--ok); }
.status-dot.warn{ background: var(--warn); }
.status-dot.err { background: var(--err); }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-weight: normal;
}

th {
  color: var(--fg-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--bg-2);
}

tr:last-child td { border-bottom: none; }

.placeholder {
  padding: 40px;
  text-align: center;
  color: var(--fg-dim);
  background: var(--bg-1);
  border: 1px dashed var(--border);
  border-radius: 6px;
}

.error {
  background: var(--bg-1);
  border: 1px solid var(--err);
  color: var(--err);
  padding: 12px 16px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
}