/**
 * Button Components
 * BEM naming: .button, .button--modifier, .button__element
 */

/* ==========================================================================
   Base Button
   ========================================================================== */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-8);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

/* ==========================================================================
   Button Variants - Colors
   ========================================================================== */

/* Primary Button (Purple) */
.button--primary {
  background-color: var(--primary-600);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-lg);
}

.button--primary:hover:not(:disabled) {
  background-color: var(--primary-700);
  transform: scale(1.05);
}

.button--primary:active:not(:disabled) {
  background-color: var(--primary-800);
  transform: scale(0.98);
}

/* Secondary Button (Neutral) */
.button--secondary {
  background-color: var(--neutral-600);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.button--secondary:hover:not(:disabled) {
  background-color: var(--neutral-700);
  transform: translateY(-2px);
}

.button--secondary:active:not(:disabled) {
  background-color: var(--neutral-800);
  transform: translateY(0);
}

/* Accent Button (Orange) */
.button--accent {
  background-color: var(--accent-500);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.button--accent:hover:not(:disabled) {
  background-color: var(--accent-600);
  transform: translateY(-2px);
}

.button--accent:active:not(:disabled) {
  background-color: var(--accent-700);
  transform: translateY(0);
}

/* Outline Button */
.button--outline {
  background-color: transparent;
  color: var(--primary-600);
  border: 2px solid var(--primary-600);
  box-shadow: none;
}

.button--outline:hover:not(:disabled) {
  background-color: var(--primary-50);
  border-color: var(--primary-700);
  color: var(--primary-700);
}

.button--outline:active:not(:disabled) {
  background-color: var(--primary-100);
}

/* Ghost Button */
.button--ghost {
  background-color: transparent;
  color: var(--primary-600);
  box-shadow: none;
}

.button--ghost:hover:not(:disabled) {
  background-color: var(--primary-50);
  color: var(--primary-700);
}

/* Link Button */
.button--link {
  background-color: transparent;
  color: var(--primary-600);
  padding: 0;
  box-shadow: none;
}

.button--link:hover:not(:disabled) {
  color: var(--primary-700);
  text-decoration: underline;
}

/* ==========================================================================
   Button Sizes
   ========================================================================== */

/* Small */
.button--small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
}

/* Large */
.button--large {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-lg);
}

/* ==========================================================================
   Button Width
   ========================================================================== */
.button--full {
  width: 100%;
}

/* ==========================================================================
   Button Icons
   ========================================================================== */
.button__icon {
  display: inline-flex;
  flex-shrink: 0;
}

.button__icon--left {
  margin-right: var(--space-2);
}

.button__icon--right {
  margin-left: var(--space-2);
}

/* Icon-only button */
.button--icon-only {
  padding: var(--space-3);
  width: 2.5rem;
  height: 2.5rem;
}

/* ==========================================================================
   Button Group
   ========================================================================== */
.button-group {
  display: inline-flex;
  gap: var(--space-2);
}

.button-group--vertical {
  flex-direction: column;
}

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

.button-group--full .button {
  flex: 1;
}

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

.button--loading::after {
  content: "";
  position: absolute;
  width: 1rem;
  height: 1rem;
  top: 50%;
  left: 50%;
  margin-left: -0.5rem;
  margin-top: -0.5rem;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: button-spinner 0.6s linear infinite;
}

@keyframes button-spinner {
  to {
    transform: rotate(360deg);
  }
}