/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.375rem 0.875rem;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1.4;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm);
}

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

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-tertiary);
}

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

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--danger);
  color: var(--text-inverse);
}

.btn-danger:hover:not(:disabled) {
  filter: brightness(1.1);
}

.btn-success {
  background: var(--success);
  color: var(--text-inverse);
}

.btn-sm {
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
}

.btn-sm svg {
  width: 0.8125rem;
  height: 0.8125rem;
}

.btn-lg {
  padding: 0.5rem 1.125rem;
  font-size: var(--text-base);
}

.btn-icon {
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn-icon svg {
  width: 1rem;
  height: 1rem;
}

.btn-icon.btn-sm {
  width: 1.5rem;
  height: 1.5rem;
}

.btn-icon.btn-sm svg {
  width: 0.8125rem;
  height: 0.8125rem;
}

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

.btn-group--joined .btn:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.btn-group--joined .btn:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  margin-left: -1px;
}

/* Action icon button */
.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.action-btn svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.action-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.action-btn.danger:hover {
  background: var(--danger-soft);
  color: var(--danger);
}