/* Button Components */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Prevent link styles from affecting buttons */
a.btn:hover {
  text-decoration: none;
}

/* Primary Button */
.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-text);
  border-color: var(--color-primary);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-primary-text);
  text-decoration: none;
}

.btn--primary:active:not(:disabled) {
  background: var(--color-primary-active);
  border-color: var(--color-primary-active);
}

/* Secondary Button */
.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary:hover:not(:disabled) {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

.btn--secondary:active:not(:disabled) {
  background: var(--color-surface-active);
}

/* Ghost Button */
.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn--ghost:hover:not(:disabled) {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

/* Success Button */
.btn--success {
  background: var(--color-success);
  color: white;
  border-color: var(--color-success);
}

.btn--success:hover:not(:disabled) {
  filter: brightness(0.9);
  color: white;
}

/* Danger Button */
.btn--danger {
  background: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

.btn--danger:hover:not(:disabled) {
  filter: brightness(0.9);
  color: white;
}

/* Button Sizes */
.btn--sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn--lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

/* Icon Button */
.btn--icon {
  padding: var(--space-2);
  width: 36px;
  height: 36px;
}

.btn--icon.btn--sm {
  width: 28px;
  height: 28px;
  padding: var(--space-1);
}

.btn--icon.btn--lg {
  width: 44px;
  height: 44px;
  padding: var(--space-2);
}

/* Button with Icon */
.btn__icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn--lg .btn__icon {
  width: 20px;
  height: 20px;
}

/* Full Width Button */
.btn--full {
  width: 100%;
}

/* Loading State */
.btn--loading {
  position: relative;
  color: transparent;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
}

.btn--primary.btn--loading::after {
  border-color: white;
  border-right-color: transparent;
}

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

/* Button Group */
.btn-group {
  display: inline-flex;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.btn-group .btn:not(:last-child) {
  border-right: none;
}

.btn-group .btn--secondary:not(:last-child) {
  border-right: 1px solid var(--color-border);
}