.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}

.btn:active { transform: translateY(1px); }

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

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

.btn-block { width: 100%; }

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}