:root {
  --brand-primary: #1e3a5f;
  --brand-accent: #2c7a7b;
  --brand-light: #f4f7f9;
}

body {
  background-color: var(--brand-light);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

.app-navbar {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
}

.card {
  border: none;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

.card-stat {
  border-radius: 14px;
  color: #fff;
  padding: 1.25rem 1.5rem;
}

.card-stat.bg-a { background: linear-gradient(135deg, #1e3a5f, #2c7a7b); }
.card-stat.bg-b { background: linear-gradient(135deg, #6a3ba1, #a15fb0); }
.card-stat.bg-c { background: linear-gradient(135deg, #b8860b, #d4a017); }
.card-stat.bg-d { background: linear-gradient(135deg, #1f7a4d, #34a869); }

.card-stat .label {
  font-size: 0.85rem;
  opacity: 0.9;
}

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

.table thead th {
  background-color: var(--brand-primary);
  color: #fff;
  font-weight: 500;
  white-space: nowrap;
}

.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e3a5f, #2c7a7b);
}

.login-card {
  border-radius: 16px;
  overflow: hidden;
  max-width: 420px;
  width: 100%;
}

.login-card .card-header {
  background: var(--brand-primary);
  color: #fff;
  text-align: center;
  padding: 2rem 1.5rem 1.5rem;
}

.btn-primary {
  background-color: var(--brand-primary);
  border-color: var(--brand-primary);
}

.btn-primary:hover {
  background-color: #16293f;
  border-color: #16293f;
}

.filter-card {
  background: #fff;
  border-radius: 12px;
  padding: 1.25rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}