:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #1c2128;
  --border: #30363d;
  --fg: #f0f6fc;
  --fg-muted: #8b949e;
  --primary: #58a6ff;
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
h1 { font-size: 20px; font-weight: 600; margin-bottom: 16px; }
h2 { font-size: 16px; font-weight: 600; }
h3 { font-size: 14px; font-weight: 600; }

.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 224px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.brand { padding: 20px; border-bottom: 1px solid var(--border); }
.brand h2 { color: var(--primary); font-size: 15px; font-weight: 700; }
.brand p { color: var(--fg-muted); font-size: 11px; margin-top: 2px; }
.nav-section { padding: 12px 0; }
.nav-section .label { padding: 6px 16px; font-size: 10px; color: var(--fg-muted); font-weight: 700; letter-spacing: 0.5px; }
.nav-section a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  margin: 0 8px;
  color: var(--fg-muted);
  border-radius: 6px;
  font-size: 13px;
}
.nav-section a:hover { background: var(--surface-2); color: var(--fg); }
.nav-section a.active { background: var(--surface-2); color: var(--fg); font-weight: 600; }
.nav-section a svg { width: 15px; height: 15px; flex-shrink: 0; }

.main { flex: 1; padding: 24px; overflow-y: auto; }
.page-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 20px; }
.card-flush { padding: 0; overflow: hidden; }

.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat .stat-label { font-size: 12px; color: var(--fg-muted); margin-bottom: 4px; }
.stat .stat-value { font-size: 24px; font-weight: 700; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
table thead th {
  padding: 10px 16px;
  text-align: left;
  text-transform: uppercase;
  font-size: 11px;
  font-weight: 600;
  color: var(--fg-muted);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
table tbody tr:hover { background: var(--surface-2); }
table tbody tr:last-child td { border-bottom: none; }
.empty { text-align: center; padding: 32px; color: var(--fg-muted); }
.muted { color: var(--fg-muted); }
.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 12px; }

.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-green { background: var(--success); }
.dot-red { background: var(--danger); }

.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; }
.badge-success { background: rgba(63,185,80,0.15); color: var(--success); }
.badge-danger { background: rgba(248,81,73,0.15); color: var(--danger); }
.badge-warning { background: rgba(210,153,34,0.15); color: var(--warning); }
.badge-muted { background: var(--surface-2); color: var(--fg-muted); }

.btn {
  height: 36px;
  padding: 0 16px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--fg);
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-sm { height: 28px; padding: 0 10px; font-size: 12px; }

input, select, textarea {
  width: 100%;
  height: 36px;
  padding: 0 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--fg);
  font-size: 13px;
  font-family: inherit;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }
textarea { padding: 10px 12px; height: auto; min-height: 200px; resize: vertical; font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 12px; line-height: 1.5; }
label { display: block; font-size: 12px; color: var(--fg-muted); margin-bottom: 6px; font-weight: 500; }
.form-row { margin-bottom: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.maxw { max-width: 640px; }
.maxw-lg { max-width: 800px; }