:root {
  --sidebar-bg: #172033;
  --sidebar-active: #2563eb;
  --body-bg: #f4f6f9;
}

body {
  background: var(--body-bg);
  color: #1f2937;
}

.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(135deg, #101827 0%, #1f3b57 48%, #2f6b5f 100%);
}

.auth-panel {
  width: 100%;
  max-width: 420px;
  border-radius: 8px;
}

.app-shell {
  min-height: 100vh;
  display: flex;
}

.sidebar {
  width: 270px;
  background: var(--sidebar-bg);
  color: #fff;
  flex-shrink: 0;
}

.sidebar .nav-link {
  color: rgba(255, 255, 255, .78);
  border-radius: 6px;
  margin-bottom: 4px;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
  color: #fff;
  background: var(--sidebar-active);
}

.content {
  flex: 1;
  min-width: 0;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}

.metric-card {
  border: 0;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .06);
}

.table-card {
  border-radius: 8px;
  border: 1px solid #e5e7eb;
}

@media (max-width: 991.98px) {
  .app-shell {
    display: block;
  }

  .sidebar {
    width: 100%;
  }
}