/**
 * DS-11: Button Component
 *
 * PR3b: aligned to product 8px radius + semantic tokens (runtime shim fallbacks).
 * Coexists with ui-components.css .bb-button — class names unchanged.
 */

.bb-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-compact, var(--space-xs, 8px));
  padding: var(--space-sm, 12px) var(--space-md, 16px);
  min-height: 44px; /* Touch target — preserved */
  border: 1px solid transparent;
  /* PR3b: was var(--radius-md, 12px) — product default is 8px */
  border-radius: var(--radius-button, 8px);
  font-size: var(--type-body-size, 1rem);
  font-weight: 600;
  line-height: var(--type-body-line, 1.6);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base, 0.2s ease);
  background: var(--color-brand-platform, var(--accent, var(--bb-gold, #C47E42)));
  color: var(--color-text-inverse, #ffffff);
  box-shadow: var(--shadow-button, 0 4px 12px rgba(0, 0, 0, 0.15));
}

.bb-button:hover {
  background: var(--color-brand-platform-hover, var(--accent-hover, var(--accent-dark, #A66B35)));
  box-shadow: var(--shadow-button-hover, 0 6px 16px rgba(0, 0, 0, 0.2));
  transform: translateY(-1px);
}

.bb-button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-button, 0 4px 12px rgba(0, 0, 0, 0.15));
}

.bb-button:focus {
  outline: 2px solid var(--color-focus-ring, var(--accent, var(--aperium-copper, #C47E42)));
  outline-offset: 2px;
}

.bb-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Variants */
.bb-button--secondary {
  background: var(--color-surface, var(--card, rgba(255, 255, 255, 0.04)));
  color: var(--color-text, var(--text-primary, rgba(255, 255, 255, 0.98)));
  border-color: var(--color-border, var(--border, rgba(196, 126, 66, 0.28)));
  box-shadow: none;
}

.bb-button--secondary:hover {
  background: var(--color-surface-hover, rgba(255, 255, 255, 0.08));
  border-color: var(--color-brand-platform, var(--accent, var(--aperium-copper, #C47E42)));
}

.bb-button--tertiary {
  background: transparent;
  color: var(--color-brand-platform, var(--accent, var(--aperium-copper, #C47E42)));
  border-color: transparent;
  box-shadow: none;
}

.bb-button--tertiary:hover {
  background: var(--color-accent-soft, var(--accent-soft, rgba(196, 126, 66, 0.12)));
}

.bb-button--danger {
  background: var(--color-danger, var(--danger, #dc2626));
  color: var(--color-text-inverse, #ffffff);
}

.bb-button--danger:hover {
  filter: brightness(0.88);
}

/* Sizes */
.bb-button--sm {
  padding: var(--space-compact, var(--space-xs, 8px)) var(--space-sm, 12px);
  min-height: 36px;
  font-size: var(--type-micro-size, 0.8125rem);
}

.bb-button--lg {
  padding: var(--space-md, 16px) var(--space-lg, 24px);
  min-height: 52px;
  font-size: var(--type-body-size, 1rem);
}

.bb-button--full-width {
  width: 100%;
}

/* Icon button */
.bb-button--icon {
  padding: var(--space-sm, 12px);
  min-width: 44px;
  min-height: 44px;
}

.bb-button--icon .bb-icon {
  width: 20px;
  height: 20px;
}

/* Loading state */
.bb-button--loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.bb-button--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: var(--radius-avatar, 50%);
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}