.r3x-btn{border-radius:var(--radius-sm);transition:background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);white-space:nowrap;-webkit-user-select:none;user-select:none;border:1px solid #0000;justify-content:center;align-items:center;gap:.45rem;font-weight:500;display:inline-flex}.r3x-btn-sm{height:28px;padding:0 .65rem;font-size:.75rem}.r3x-btn-md{height:34px;padding:0 .85rem;font-size:.8125rem}.r3x-btn-lg{height:38px;padding:0 1.15rem;font-size:.875rem}.r3x-btn-primary{background:var(--accent);color:var(--text-inverse);font-weight:500}.r3x-btn-primary:hover:not(:disabled){background:var(--accent-hover)}.r3x-btn-primary:active:not(:disabled){background:var(--accent-active)}.r3x-btn-secondary{background:var(--surface-2);color:var(--text-primary);border-color:var(--border-default)}.r3x-btn-secondary:hover:not(:disabled){background:var(--surface-hover);border-color:var(--border-hover)}.r3x-btn-outline{color:var(--text-secondary);border-color:var(--border-default);background:0 0}.r3x-btn-outline:hover:not(:disabled){background:var(--surface-1);color:var(--text-primary);border-color:var(--border-hover)}.r3x-btn-ghost{color:var(--text-secondary);background:0 0}.r3x-btn-ghost:hover:not(:disabled){background:var(--surface-2);color:var(--text-primary)}.r3x-btn-danger{background:var(--error-subtle);color:var(--error);border-color:#ef444433}.r3x-btn-danger:hover:not(:disabled){background:var(--error);color:#fff}.r3x-btn:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.r3x-btn-primary:disabled{background:var(--surface-2);color:var(--text-muted);border-color:var(--border-subtle);opacity:.6}.r3x-btn-icon{justify-content:center;align-items:center;display:inline-flex}.r3x-spinner{border:1.5px solid #ffffff40;border-top-color:currentColor;border-radius:50%;width:14px;height:14px;animation:.6s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}