@use '../../styles/variables' as *;

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1rem;
  font-family: var(--ui-font);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--border-radius-lg);
  border: 1px solid transparent;
  cursor: pointer;
  transition: 
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;

  &:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--color-primary-light);
  }

  &:active {
    transform: scale(0.98);
  }

  &:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
  }

  // Size variants
  &.size-sm {
    padding: 0.375rem 0.75rem;
    font-size: var(--text-xs);
  }

  &.size-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--text-base);
  }

  // Full width
  &.fullWidth {
    width: 100%;
  }
}

// Primary variant
.variant-primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);

  &:hover:not(:disabled) {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
  }

  &:active {
    background: var(--color-primary-darkest);
    border-color: var(--color-primary-darkest);
  }
}

// Secondary variant
.variant-secondary {
  background: var(--color-surface-low);
  color: var(--color-on-surface);
  border-color: var(--color-surface-high);

  &:hover:not(:disabled) {
    background: var(--color-surface-high);
    border-color: var(--color-gray-30);
  }

  &:active {
    background: var(--color-gray-20);
  }
}

// Ghost variant
.variant-ghost {
  background: transparent;
  color: var(--color-on-surface);
  border-color: transparent;

  &:hover:not(:disabled) {
    background: var(--color-surface-low);
  }

  &:active {
    background: var(--color-surface-high);
  }
}

// Danger variant
.variant-danger {
  background: var(--color-danger);
  color: white;
  border-color: var(--color-danger);

  &:hover:not(:disabled) {
    background: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
  }

  &:active {
    background: var(--color-danger-darker);
    border-color: var(--color-danger-darker);
  }
}

// Icon only
.iconOnly {
  padding: 0.5rem;
  
  &.size-sm {
    padding: 0.375rem;
  }
  
  &.size-lg {
    padding: 0.625rem;
  }
}

// Loading state
.loading {
  position: relative;
  color: transparent !important;
  
  &::after {
    content: '';
    position: absolute;
    width: 1em;
    height: 1em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
  }
}

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