/* ============================================
   Button Component - Inspirado no shadcn/ui
   ============================================ */

/* Base Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  font-family: var(--font-family);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
  line-height: 1;
  position: relative;
  user-select: none;
  /* Default size - aplicado a todos os botões */
  height: 2.5rem; /* 40px */
  padding: 0 var(--spacing-4);
}

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

.btn:disabled {
  pointer-events: none;
  opacity: 0.5;
}

/* ============================================
   Button Sizes
   ============================================ */
.btn--sm {
  height: 2.25rem; /* 36px */
  padding: 0 var(--spacing-3);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-base);
}

.btn--lg {
  height: 2.75rem; /* 44px */
  padding: 0 var(--spacing-8);
  font-size: var(--font-size-base);
}

.btn--icon {
  height: 2.5rem;
  width: 2.5rem;
  padding: 0;
}

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

.btn--icon.btn--lg {
  height: 2.75rem;
  width: 2.75rem;
}

/* ============================================
   Button Variants - Default
   ============================================ */
.btn--default {
  background-color: var(--primary-500);
  color: white;
}

.btn--default:hover {
  background-color: var(--primary-600);
}

.btn--default:active {
  background-color: var(--primary-700);
}

/* ============================================
   Button Variants - Destructive
   ============================================ */
.btn--destructive {
  background-color: var(--error-500);
  color: white;
}

.btn--destructive:hover {
  background-color: var(--error-600);
}

.btn--destructive:active {
  background-color: var(--error-700);
}

/* ============================================
   Button Variants - Outline
   ============================================ */
.btn--outline {
  border: 1px solid var(--border);
  background-color: transparent;
  color: var(--foreground);
}

.btn--outline:hover {
  background-color: var(--neutral-100);
  color: var(--foreground);
}

.btn--outline:active {
  background-color: var(--neutral-200);
}

/* ============================================
   Button Variants - Secondary
   ============================================ */
.btn--secondary {
  background-color: var(--neutral-100);
  color: var(--foreground);
}

.btn--secondary:hover {
  background-color: var(--neutral-200);
}

.btn--secondary:active {
  background-color: var(--neutral-300);
}

/* ============================================
   Button Variants - Ghost
   ============================================ */
.btn--ghost {
  background-color: transparent;
  color: var(--foreground);
}

.btn--ghost:hover {
  background-color: var(--neutral-100);
  color: var(--foreground);
}

.btn--ghost:active {
  background-color: var(--neutral-200);
}

/* ============================================
   Button Variants - Link
   ============================================ */
.btn--link {
  background-color: transparent;
  color: var(--primary-500);
  text-decoration: underline;
  text-underline-offset: 4px;
  padding: 0;
  height: auto;
}

.btn--link:hover {
  color: var(--primary-600);
  text-decoration: underline;
}

.btn--link:active {
  color: var(--primary-700);
}

/* ============================================
   Button Variants - Success (Custom)
   ============================================ */
.btn--success {
  background-color: var(--success-500);
  color: white;
}

.btn--success:hover {
  background-color: var(--success-600);
}

.btn--success:active {
  background-color: var(--success-700);
}

/* ============================================
   Button Variants - Warning (Custom)
   ============================================ */
.btn--warning {
  background-color: var(--warning-500);
  color: white;
}

.btn--warning:hover {
  background-color: var(--warning-600);
}

.btn--warning:active {
  background-color: var(--warning-700);
}

/* ============================================
   Button Variants - Info (Custom)
   ============================================ */
.btn--info {
  background-color: var(--info-500);
  color: white;
}

.btn--info:hover {
  background-color: var(--info-600);
}

.btn--info:active {
  background-color: var(--info-700);
}

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

.btn--loading::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 2px solid currentColor;
  border-radius: 50%;
  border-top-color: transparent;
  animation: btn-spin 0.6s linear infinite;
}

@keyframes btn-spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* Spinner branco para botões com fundo escuro */
.btn--loading.btn--default::after,
.btn--loading.btn--destructive::after,
.btn--loading.btn--success::after,
.btn--loading.btn--warning::after,
.btn--loading.btn--info::after {
  border-color: white;
  border-top-color: transparent;
}

/* Spinner escuro para botões com fundo claro */
.btn--loading.btn--outline::after,
.btn--loading.btn--secondary::after,
.btn--loading.btn--ghost::after {
  border-color: var(--foreground);
  border-top-color: transparent;
}

/* Spinner com cor primária para botão link */
.btn--loading.btn--link::after {
  border-color: var(--primary-500);
  border-top-color: transparent;
}

/* ============================================
   Button with Badge
   ============================================ */
.btn:has(.badge) {
  gap: var(--spacing-2);
}

/* ============================================
   Button as Link
   ============================================ */
a.btn {
  display: inline-flex;
  text-decoration: none;
}

a.btn--link {
  text-decoration: underline;
}