.mask-tb{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:var(--bg-card);border-top:1px solid var(--border-subtle)}.mask-tb__seg{display:inline-flex;align-items:stretch;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);overflow:hidden}.mask-tb__btn{padding:6px 12px;border:0;border-left:1px solid var(--border-subtle);background:var(--bg-card);color:var(--text-secondary);font-size:12px;font-family:inherit;line-height:1.4;cursor:pointer;white-space:nowrap;transition:background .15s ease,color .15s ease}.mask-tb__btn:first-child{border-left:0}.mask-tb__btn:hover{background:var(--bg-hover);color:var(--text-primary)}.mask-tb__btn.is-on{background:var(--text-primary);color:var(--bg-card)}.mask-tb__spacer{flex:1 1 auto}.mask-tb__brush{display:inline-flex;align-items:center;gap:var(--space-sm)}.mask-tb__brush-label{font-size:12px;color:var(--text-secondary);white-space:nowrap}.mask-tb__range{width:100px;height:4px;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--border-subtle);border-radius:2px;outline:none;cursor:pointer}.mask-tb__range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--text-primary);border:2px solid var(--bg-card);box-shadow:0 1px 3px #0003;cursor:pointer}.mask-tb__range::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--text-primary);border:2px solid var(--bg-card);box-shadow:0 1px 3px #0003;cursor:pointer}.mask-tb__size{font-size:12px;color:var(--text-muted);min-width:32px;text-align:right;font-variant-numeric:tabular-nums}@media(max-width:640px){.mask-tb{gap:6px}.mask-tb__spacer{display:none}.mask-tb__brush{width:100%}.mask-tb__range{flex:1 1 auto;width:auto}}