:root {
  --brand: #2563eb;
  --brand-dark: #1e40af;
  --bg: #f5f7fb;
  --card-border: #e6e9f0;
  --text-muted: #6b7280;
  --good: #16a34a;
  --bad: #dc2626;
}

body {
  background: var(--bg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #1f2430;
}

.app-navbar {
  background: #fff;
  border-bottom: 1px solid var(--card-border);
  padding: 0.75rem 0;
}

.navbar-brand {
  font-weight: 700;
  color: var(--brand-dark) !important;
  font-size: 1.1rem;
}

.nav-link {
  color: #444 !important;
  font-weight: 500;
  font-size: 0.92rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--brand) !important;
}

.user-chip {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.app-main {
  min-height: calc(100vh - 130px);
}

.card {
  border: 1px solid var(--card-border);
  border-radius: 0.75rem;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.card-header {
  background: #fff;
  border-bottom: 1px solid var(--card-border);
  font-weight: 600;
  border-radius: 0.75rem 0.75rem 0 0 !important;
}

.stat-card {
  padding: 1.1rem 1.25rem;
}

.stat-card .stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stat-card .stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: #111827;
}

.table-ratio th, .table-ratio td {
  vertical-align: middle;
}

.table-ratio thead th {
  background: #f8fafc;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  border-bottom: 2px solid var(--card-border);
}

.badge-group {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.text-good { color: var(--good) !important; }
.text-bad { color: var(--bad) !important; }

.nav-tabs .nav-link {
  color: #444 !important;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
}

.nav-tabs .nav-link.active {
  color: var(--brand) !important;
  border-bottom: 2px solid var(--brand);
  background: transparent;
  font-weight: 600;
}

.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eef2ff 0%, #f5f7fb 60%);
}

.login-card {
  max-width: 380px;
  width: 100%;
  padding: 2rem;
}

.form-label {
  font-weight: 500;
  font-size: 0.9rem;
}

.app-footer {
  border-top: 1px solid var(--card-border);
  background: #fff;
}

.filter-bar {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: 0.75rem;
  padding: 0.9rem 1.1rem;
}

@media (max-width: 576px) {
  .stat-value { font-size: 1.25rem; }
}