/**
 * @file buttons.css
 * Componentes de botões — NERUDS GUI
 * Estilos para buttons, links e CTAs
 */

/* =====================================================
   BOTÕES BASE
   ===================================================== */

.btn,
button,
[role="button"] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-sans);
  text-decoration: none;
  border: var(--border-width-thin) solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  outline: none;
}

.btn:hover,
button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn:disabled,
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* =====================================================
   VARIANTES DE BOTÃO
   ===================================================== */

/* Primary — Verde Babaçu */
.btn--primary {
  background-color: var(--color-babasu);
  color: var(--color-white);
  border-color: var(--color-babasu);
}

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

/* Secondary — Barro */
.btn--secondary {
  background-color: var(--color-barro);
  color: var(--color-white);
  border-color: var(--color-barro);
}

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

/* Accent — Palha/Ouro */
.btn--accent {
  background-color: var(--color-palha);
  color: var(--color-babasu-dark);
  border-color: var(--color-palha);
}

.btn--accent:hover {
  background-color: var(--color-palha);
  opacity: 0.9;
}

/* Outline — Contorno */
.btn--outline {
  background-color: transparent;
  color: var(--color-babasu);
  border-color: var(--color-babasu);
}

.btn--outline:hover {
  background-color: var(--color-babasu);
  color: var(--color-white);
}

/* Ghost — Transparente */
.btn--ghost {
  background-color: transparent;
  color: var(--color-babasu);
  border-color: transparent;
}

.btn--ghost:hover {
  background-color: rgba(46, 70, 50, 0.1);
}

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

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

/* =====================================================
   TAMANHOS
   ===================================================== */

.btn--sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
}

.btn--lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-lg);
}

.btn--xl {
  padding: var(--space-5) var(--space-8);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
}

/* Full width */
.btn--block {
  display: flex;
  width: 100%;
}

/* =====================================================
   ÍCONES + TEXTO
   ===================================================== */

.btn__icon {
  display: inline-flex;
  width: 1.25em;
  height: 1.25em;
}

.btn__icon svg {
  width: 100%;
  height: 100%;
}

/* =====================================================
   LOADING STATE
   ===================================================== */

.btn--loading {
  position: relative;
  color: transparent;
}

.btn--loading::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--color-white);
  animation: spin 0.6s linear infinite;
}

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

/* =====================================================
   GRUPO DE BOTÕES
   ===================================================== */

.btn-group {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .btn-group {
    flex-direction: column;
  }

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