/* Kole UI Button 样式 — 对齐 components.css 与 button.json 契约 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 4px; border: 1px solid transparent; cursor: pointer;
  white-space: nowrap; font-size: 14px; line-height: 22px;
  border-radius: 4px; min-width: 64px; padding: 0 12px;
  box-sizing: border-box; transition: background .15s, border-color .15s;
  font-family: var(--kole-font-family);
 flex-shrink: 0;}
.btn:focus-visible { outline: 2px solid var(--kole-color-focus-ring); outline-offset: 2px; }

.btn-primary { background: var(--kole-color-brand); color: var(--kole-color-text-inverse); }
.btn-primary:hover { background: var(--kole-color-brand-hover); }
.btn-primary:active { background: var(--kole-color-brand-active); }

.btn-default { background: var(--kole-color-card-bg); border-color: var(--kole-color-border); color: var(--kole-color-text-body); }
.btn-default:hover { border-color: var(--kole-color-brand); }

.btn-text { background: transparent; color: var(--kole-color-brand); }
.btn-text:hover { background: var(--kole-color-brand-bg); }

.btn-link { background: transparent; border: none; color: var(--kole-color-brand); min-width: auto; padding: 0; }
.btn-link:hover { background: var(--kole-color-brand-bg); }

.btn-danger { background: var(--kole-color-error); color: var(--kole-color-text-inverse); }
.btn-danger:hover { filter: brightness(.92); }

.btn-lg { height: var(--kole-control-height-large); }
.btn-md { height: var(--kole-control-height-default); }
.btn-sm { height: var(--kole-control-height-small); }

.btn-disabled, .btn:disabled { background: var(--kole-color-disabled-bg); border-color: transparent; color: var(--kole-color-text-placeholder); cursor: not-allowed; }
.btn-disabled:hover, .btn:disabled:hover { background: var(--kole-color-disabled-bg); filter: none; }

.btn .btn-icon { flex-shrink: 0; }

.btn.is-loading { cursor: progress; position: relative; }
.btn.is-loading .btn-label { opacity: .65; }
.btn .spinner {
  width: 14px; height: 14px; border: 2px solid currentColor; border-top-color: transparent;
  border-radius: 50%; animation: kole-btn-spin .6s linear infinite;
 display: inline-block;}
@keyframes kole-btn-spin { to { transform: rotate(360deg); } }