/* ==========================================================================
   Card
   Base card + KPI Card variant. Chart/Activity/Product/Customer/Report card
   variants build on this same base and get their specific layouts alongside
   the pages that introduce them.
   ========================================================================== */

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.card--hoverable:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-4) 0;
}

.card-header:only-child {
  padding-bottom: var(--space-4);
}

.card-title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.card-subtitle {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.card-body {
  padding: var(--space-4);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* KPI Card */
.kpi-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
}

.kpi-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.kpi-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
}

.kpi-card-title {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.kpi-card-value {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

.kpi-card-trend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-semibold);
}

.kpi-card-trend--up {
  color: var(--color-success);
}

.kpi-card-trend--down {
  color: var(--color-danger);
}

.kpi-card-description {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}