.card {
  background: var(--color-card);
  border: 1px solid var(--color-border-light);
  border-radius: 6px;
  padding: 18px;
  box-shadow: 0 1px 3px var(--color-shadow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.card-body {
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.card-stats-value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.chart-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
}

.card-stats-label {
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--font-size-xs);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-primary);
  border-color: rgba(255, 255, 255, 0.08);
}

.btn-sm {
  padding: 8px 12px;
  font-size: 0.9rem;
}

.alert {
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.alert-info {
  background: rgba(56, 189, 248, 0.06);
  color: #0f172a;
}

.alert-success {
  background: rgba(34, 197, 94, 0.06);
  color: #0f172a;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.06);
  color: #0f172a;
}

.alert-error {
  background: rgba(239, 68, 68, 0.06);
  color: #0f172a;
}