:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --border: #e2e5ea;
  --text: #1c1f26;
  --text-muted: #667085;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --ok: #16a34a;
  --warn: #d97706;
  --off: #9ca3af;
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --card: #1c1f26;
    --border: #2b2f38;
    --text: #e6e8eb;
    --text-muted: #8b93a3;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

nav a.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
}

nav .nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-muted);
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1.5rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.card h2, .card h3 {
  margin-top: 0;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.stat .value {
  font-size: 1.6rem;
  font-weight: 700;
}

.stat .label {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
  vertical-align: middle;
}

th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

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

a { color: var(--accent); }

.badge {
  display: inline-block;
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
}
.badge.online { background: var(--ok); }
.badge.offline { background: var(--off); }
.badge.pending { background: var(--warn); }
.badge.enrolled { background: var(--accent); }
.badge.client { background: var(--accent); }
.badge.site-to-site { background: #7c3aed; }

form.inline { display: inline; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
  align-items: end;
}

label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

input, select {
  width: 100%;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.88rem;
}

button, .btn {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
button:hover, .btn:hover { background: var(--accent-hover); }
button.danger { background: var(--danger); }
button.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }

.error-banner {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  font-size: 0.88rem;
}
@media (prefers-color-scheme: dark) {
  .error-banner { background: #2a1414; border-color: #5c1f1f; color: #fca5a5; }
}

.warn-banner {
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  font-size: 0.88rem;
}
@media (prefers-color-scheme: dark) {
  .warn-banner { background: #2a2410; border-color: #5c4f1f; color: #fcd34d; }
}

pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.9rem;
  overflow-x: auto;
  font-size: 0.82rem;
}

.muted { color: var(--text-muted); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.82rem; word-break: break-all; }

.login-wrap {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card { width: 320px; }

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.back-link { display: inline-block; margin-bottom: 1rem; }