:root {
  --brand: #6d28d9;
  --brand-dark: #4c1d95;
  --bg: #f7f7fb;
  --card: #ffffff;
  --text: #1f2129;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #16a34a;
  --warning: #d97706;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.brand {
  font-weight: 700;
  font-size: 22px;
  color: var(--brand-dark);
  margin-bottom: 24px;
  display: block;
}

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--muted); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}
.field textarea { min-height: 90px; resize: vertical; }

.checkbox-field { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; }
.checkbox-field input { width: auto; }

.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--brand-dark); text-decoration: none; }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #f3f4f6; }
.btn-danger { background: var(--danger); }
.btn-block { width: 100%; text-align: center; }

.alert { padding: 10px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 16px; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-info { background: #e0e7ff; color: #3730a3; }
.alert-success { background: #dcfce7; color: #166534; }

.muted { color: var(--muted); font-size: 13px; }

.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: var(--brand-dark);
  color: #fff;
  padding: 20px 0;
  flex-shrink: 0;
}
.sidebar .brand { color: #fff; padding: 0 20px; }
.sidebar nav a {
  display: block;
  color: #ddd6fe;
  padding: 10px 20px;
  font-size: 14px;
}
.sidebar nav a:hover, .sidebar nav a.active { background: rgba(255,255,255,0.1); color: #fff; text-decoration: none; }
.main { flex: 1; padding: 28px 32px; max-width: 1100px; }

.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.topbar h1 { font-size: 20px; margin: 0; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 20px; margin-bottom: 20px; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.stat-card .value { font-size: 24px; font-weight: 700; }
.stat-card .label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.03em; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }

.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-connected { background: #dcfce7; color: #166534; }
.badge-awaiting { background: #f3f4f6; color: #4b5563; }
.badge-expired { background: #fef3c7; color: #92400e; }
.badge-error { background: #fee2e2; color: #991b1b; }

.connection-card { display: flex; justify-content: space-between; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--border); }
.connection-card:last-child { border-bottom: none; }

.empty-state { text-align: center; padding: 48px 20px; color: var(--muted); }

@media (max-width: 720px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; }
  .main { padding: 20px; }
}