/* ═══════════════════════════════════════
   CLEN | كلن — Button Component
   ═══════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.25rem;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              box-shadow var(--transition-fast),
              opacity var(--transition-fast),
              transform var(--transition-fast);
  white-space: nowrap;
  min-height: 2.75rem;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled,
.btn--disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}

/* Variants */
.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
}

.btn--secondary {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
}

.btn--secondary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-text-on-primary);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--outline:hover {
  background-color: var(--color-primary-subtle);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.btn--ghost:hover {
  background-color: var(--color-border-light);
  color: var(--color-text-primary);
}

.btn--danger {
  background-color: var(--color-error);
  color: var(--color-text-on-primary);
}

.btn--danger:hover {
  opacity: 0.9;
}

.btn--white {
  background-color: var(--color-white);
  color: var(--color-primary);
}

.btn--white:hover {
  background-color: var(--color-border-light);
}

/* Sizes */
.btn--sm {
  padding: 0.5rem 0.875rem;
  font-size: var(--font-size-sm);
  min-height: 2.25rem;
}

.btn--lg {
  padding: 1rem 1.5rem;
  font-size: var(--font-size-lg);
  min-height: 3.25rem;
}

.btn--block {
  width: 100%;
}

.btn--icon {
  padding: 0.625rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
}

.btn--icon.btn--sm {
  min-width: 2.25rem;
  min-height: 2.25rem;
  padding: 0.5rem;
}

.btn__icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.btn__icon--sm {
  width: 1rem;
  height: 1rem;
}

/* Button group */
.btn-group {
  display: flex;
  gap: var(--space-sm);
}

.btn-group--stack {
  flex-direction: column;
}