/* ============================================
   Button Component
   ============================================ */

   .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
  
    min-height: 44px;
    padding: 14px 24px;
  
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
  
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    letter-spacing: 0.01em;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
  
    cursor: pointer;
    user-select: none;
    touch-action: manipulation;
  
    transition:
      background-color var(--transition-base),
      border-color var(--transition-base),
      color var(--transition-base),
      box-shadow var(--transition-base),
      transform var(--transition-base);
  }
  
  .btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
  }
  
  .btn:disabled,
  .btn[aria-disabled="true"] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
  }
  
  /* Primary */
  .btn--primary {
    background-color: var(--color-primary);
    color: white;
  }
  
  @media (hover: hover) and (pointer: fine) {
    .btn--primary:hover:not(:disabled) {
      background-color: var(--color-primary-dark);
      transform: translateY(-1px);
    }
  }
  
  /* Secondary */
  .btn--secondary {
    background-color: white;
    color: var(--color-primary);
    border-color: var(--color-primary);
  }
  
  @media (hover: hover) and (pointer: fine) {
    .btn--secondary:hover:not(:disabled) {
      background-color: var(--color-primary-light);
      transform: translateY(-1px);
    }
  }
  
  /* Ghost / Outline */
  .btn--outline {
    background-color: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
  }
  
  @media (hover: hover) and (pointer: fine) {
    .btn--outline:hover:not(:disabled) {
      color: var(--color-primary);
      border-color: var(--color-primary);
      background-color: rgba(0, 156, 67, 0.04);
    }
  }
  
  /* Glass Button */
  .btn--glass {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
  
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  
  @media (hover: hover) and (pointer: fine) {
    .btn--glass:hover:not(:disabled) {
      background-color: rgba(255, 255, 255, 0.18);
    }
  }
  
  /* White button (for dark backgrounds) */
  .btn--white {
    background-color: white;
    color: var(--color-primary);
  }
  
  @media (hover: hover) and (pointer: fine) {
    .btn--white:hover:not(:disabled) {
      background-color: var(--color-bg-tertiary);
      transform: translateY(-1px);
    }
  }
  
  /* Sizes */
  .btn--sm {
    min-height: 36px;
    padding: 10px 16px;
  
    font-size: var(--font-size-xs);
  }
  
  .btn--lg {
    padding: 18px 32px;
  
    font-size: var(--font-size-base);
    border-radius: var(--radius-xl);
  }
  
  .btn--xl {
    padding: 20px 40px;
  
    font-size: var(--font-size-lg);
    border-radius: var(--radius-xl);
  }
  
  .btn--block {
    width: 100%;
  }
  
  /* Icons */
  .btn__icon {
    flex-shrink: 0;
  }
  
  .btn__icon--right {
    transition: transform var(--transition-base);
  }
  
  @media (hover: hover) and (pointer: fine) {
    .btn:hover .btn__icon--right {
      transform: translateX(4px);
    }
  }
  
  /* Reduced motion */
  @media (prefers-reduced-motion: reduce) {
    .btn,
    .btn__icon--right {
      transition: none;
    }
  
    .btn:hover .btn__icon--right {
      transform: none;
    }
  
    .btn:hover {
      transform: none;
    }
  }