:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --green: #3dd68c;
  --red: #f87171;
  --amber: #fbbf24;
  --blue: #60a5fa;
  --accent: #6366f1;
}
* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  line-height: 1.5;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header h1 { margin: 0; font-size: 1.25rem; }
header .meta { color: var(--muted); font-size: 0.875rem; }
main { max-width: 1200px; margin: 0 auto; padding: 1.5rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}
.card h2 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge.online { background: #064e3b; color: var(--green); }
.badge.offline { background: #450a0a; color: var(--red); }
.stat { color: var(--muted); font-size: 0.875rem; margin: 0.25rem 0; }
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.875rem;
  margin: 0.25rem 0.25rem 0.25rem 0;
}
.btn-primary { background: var(--accent); color: white; }
.btn-danger { background: #991b1b; color: white; }
.btn-secondary { background: var(--border); color: var(--text); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.tabs a {
  padding: 0.5rem 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
}
.tabs a.active { border-color: var(--accent); background: #252f42; }
.alert {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}
.alert-warn { background: #422006; border: 1px solid var(--amber); color: #fde68a; }
.alert-ok { background: #064e3b; color: #a7f3d0; }
.alert-err { background: #450a0a; color: #fecaca; }
textarea, input[type=text], input[type=password] {
  width: 100%;
  background: #0d1117;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem;
  border-radius: 6px;
  font-family: ui-monospace, monospace;
}
textarea { min-height: 400px; font-size: 0.8rem; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.5rem; border-bottom: 1px solid var(--border); }
.log-box {
  background: #0d1117;
  padding: 1rem;
  border-radius: 6px;
  font-family: ui-monospace, monospace;
  font-size: 0.75rem;
  white-space: pre-wrap;
  max-height: 70vh;
  overflow: auto;
}
.login-box { max-width: 400px; margin: 4rem auto; }