/* buttons.css - Button Component Styles */

/* ==================== BASE BUTTON ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn:disabled,
.btn.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* ==================== PRIMARY BUTTON ==================== */
.btn-primary {
  background: var(--primary-500);
  color: white;
  border-color: var(--primary-500);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-600);
  border-color: var(--primary-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
  background: var(--primary-700);
  transform: translateY(0);
}

/* ==================== SECONDARY BUTTON ==================== */
.btn-secondary {
  background: var(--neutral-100);
  color: var(--neutral-700);
  border-color: var(--neutral-300);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--neutral-200);
  border-color: var(--neutral-400);
}

.btn-secondary:active:not(:disabled) {
  background: var(--neutral-300);
}

/* ==================== SUCCESS BUTTON ==================== */
.btn-success {
  background: var(--success-500);
  color: white;
  border-color: var(--success-500);
}

.btn-success:hover:not(:disabled) {
  background: var(--success-600);
  border-color: var(--success-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-success:active:not(:disabled) {
  background: var(--success-700);
  transform: translateY(0);
}

/* ==================== DANGER BUTTON ==================== */
.btn-danger {
  background: var(--error-500);
  color: white;
  border-color: var(--error-500);
}

.btn-danger:hover:not(:disabled) {
  background: var(--error-600);
  border-color: var(--error-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-danger:active:not(:disabled) {
  background: var(--error-700);
  transform: translateY(0);
}

/* ==================== OUTLINE VARIANTS ==================== */
.btn-outline-primary {
  background: transparent;
  color: var(--primary-600);
  border-color: var(--primary-500);
}

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

.btn-outline-secondary {
  background: transparent;
  color: var(--neutral-700);
  border-color: var(--neutral-400);
}

.btn-outline-secondary:hover:not(:disabled) {
  background: var(--neutral-100);
  color: var(--neutral-800);
}

/* ==================== GHOST BUTTON ==================== */
.btn-ghost {
  background: transparent;
  color: var(--neutral-700);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--neutral-100);
}

/* ==================== LINK BUTTON ==================== */
.btn-link {
  background: transparent;
  color: var(--primary-600);
  border-color: transparent;
  padding: 0;
}

.btn-link:hover:not(:disabled) {
  color: var(--primary-700);
  text-decoration: none;
}

/* ==================== SIZES ==================== */
.btn-xs {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--text-xs);
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-lg);
}

.btn-xl {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--text-xl);
}

/* ==================== FULL WIDTH ==================== */
.btn-block {
  display: flex;
  width: 100%;
}

/* ==================== ICON BUTTONS ==================== */
.btn-icon {
  padding: var(--space-sm);
  width: 36px;
  height: 36px;
}

.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
  padding: var(--space-xs);
}

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

/* ==================== BUTTON GROUP ==================== */
.btn-group {
  display: inline-flex;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

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

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

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

/* ==================== LOADING STATE ==================== */
.btn-loading {
  color: transparent !important;
  pointer-events: none;
  position: relative;
}

.btn-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.btn-primary.btn-loading::after,
.btn-success.btn-loading::after,
.btn-danger.btn-loading::after {
  border-color: white;
  border-top-color: transparent;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 576px) {
  .btn {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-xs);
  }
  
  .btn-lg {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-base);
  }
}