/* Usage page specific styles */
.usage-filters {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.usage-filters select,
.usage-filters input[type="date"] {
  padding: 9px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-size: 0.85rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.usage-filters select:focus,
.usage-filters input[type="date"]:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-ring);
}

.model-usage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}

.model-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.model-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-border-light);
  transition: background var(--transition);
}

.model-card:hover {
  border-color: var(--color-primary-subtle);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.model-card:hover::before {
  background: var(--color-primary);
}

.model-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.model-name {
  font-weight: 700;
  font-size: 0.93rem;
  letter-spacing: -0.01em;
}

.model-provider {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

.model-stat {
  display: flex;
  justify-content: space-between;
  font-size: 0.84rem;
  margin-bottom: 6px;
  padding: 5px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.model-stat:last-child {
  border-bottom: none;
}

.model-stat-label {
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
}

.model-stat-value {
  font-weight: 700;
}

.cost-chart {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 160px;
  padding-top: 16px;
}

.cost-bar {
  flex: 1;
  background: var(--color-primary);
  border-radius: 4px 4px 0 0;
  min-height: 2px;
  position: relative;
  cursor: pointer;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.cost-bar:hover {
  opacity: 0.75;
  transform: scaleY(1.02);
  transform-origin: bottom;
}

@media (max-width: 768px) {
  .model-usage-grid {
    grid-template-columns: 1fr;
  }

  .cost-chart {
    height: 120px;
  }
}