.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 40px;
  padding: 8px 15px;
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:hover {
  text-decoration: none;
}

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

.btn--primary {
  background: var(--color-primary-600);
  color: #fff;
  border-color: var(--color-primary-600);
}

.btn--primary:hover {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
  color: #fff;
}

/* Rodada A: secundário = superfície com borda (no escuro também, pelos tokens). */
.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary:hover {
  background: var(--surface-2);
  color: var(--color-text);
}

.btn--danger {
  background: var(--color-danger-500);
  color: #fff;
  border-color: var(--color-danger-500);
}

.btn--danger:hover {
  background: var(--color-danger-600);
  border-color: var(--color-danger-600);
  color: #fff;
}

/* Ação de exceção que tem de ser inconfundível sem competir com a principal (a
   emergência ao lado da proposta, UAT 2026-09-27). */
.btn--danger-outline {
  --btn-danger-ink: var(--color-danger-600);
  --btn-danger-tint: rgba(239, 68, 68, 0.08);
  background: transparent;
  color: var(--btn-danger-ink);
  border-color: currentColor;
}

.btn--danger-outline:hover {
  background: var(--btn-danger-tint);
  color: var(--btn-danger-ink);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn--danger-outline {
    --btn-danger-ink: #f87171;
    --btn-danger-tint: rgba(248, 113, 113, 0.12);
  }
}

[data-theme="dark"] .btn--danger-outline {
  --btn-danger-ink: #f87171;
  --btn-danger-tint: rgba(248, 113, 113, 0.12);
}

/* Ação que EXISTE mas ainda não pode ser feita: neutra, com cadeado e cursor de
   proibido — o primário a 50% parecia "quase habilitado". O `pointer-events` volta para o
   cursor e o title aparecerem; o `disabled` continua impedindo o clique. */
.btn--blocked,
.btn--blocked:disabled {
  background: var(--color-surface-disabled);
  color: var(--color-text-secondary);
  border-color: var(--color-border);
  opacity: 1;
  pointer-events: auto;
  cursor: not-allowed;
}

.btn__icon {
  flex-shrink: 0;
}

.btn--success {
  background: var(--color-success-600);
  color: #fff;
  border-color: var(--color-success-600);
}

.btn--success:hover {
  background: var(--color-success-700);
  border-color: var(--color-success-700);
  color: #fff;
}

.btn--warning {
  background: var(--color-warning-600);
  color: #fff;
  border-color: var(--color-warning-600);
}

.btn--warning:hover {
  background: var(--color-warning-700);
  border-color: var(--color-warning-700);
  color: #fff;
}

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

.btn--ghost:hover {
  background: var(--surface-2);
  color: var(--color-text);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--outline:hover {
  background: var(--surface-2);
  border-color: var(--color-gray-300);
}

.btn--sm {
  min-height: 32px;
  padding: 6px 11px;
  border-radius: 9px;
  font-size: 12px;
}

.btn--lg {
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 12px;
  font-size: 15px;
}

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

.btn--loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.table .btn--ghost {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.table .btn--ghost:hover {
  background: var(--accent-soft);
  border-color: var(--accent-mid);
  color: var(--accent);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn--ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text);
  }

  :root:not([data-theme="light"]) .btn--outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-gray-600);
    color: var(--color-text);
  }

}

[data-theme="dark"] .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
}

[data-theme="dark"] .btn--outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-gray-600);
  color: var(--color-text);
}