:root{--bfa-primary:var(--main-primary);--bfa-primary-rgb:var(--main-primary-rgb);--bfa-text:var(--main-text);--bfa-text-muted:var(--main-text-muted);--bfa-bg:var(--main-bg-primary);--bfa-bg-secondary:var(--main-bg-secondary);--bfa-border:var(--main-border);--bfa-border-hover:var(--main-border-dark);--bfa-canvas-bg:var(--main-gray-900);--bfa-toolbar-bg:var(--main-bg-primary);--bfa-toolbar-border:var(--main-border);--bfa-radius:var(--main-radius);--bfa-radius-lg:var(--main-radius-lg);--bfa-region-border:rgba(var(--main-primary-rgb), .8);--bfa-region-fill:rgba(var(--main-primary-rgb), .15);--bfa-hint-color:#fff9}._bfa-container{flex-direction:column;min-height:70vh;display:flex}._bfa-editor{flex-direction:column;flex:1;min-height:70vh;display:flex}@media (max-width:768px){._bfa-container{min-height:60vh;padding-left:.75rem;padding-right:.75rem}._bfa-editor{min-height:60vh}}@media (max-width:480px){._bfa-container{padding-left:.5rem;padding-right:.5rem}}._bfa-upload{cursor:pointer;-webkit-tap-highlight-color:transparent;justify-content:center;align-items:center;min-height:50vh;display:flex}._bfa-upload-inner{align-items:center;gap:var(--main-space-4);padding:var(--main-space-12) var(--main-space-8);border-style:dashed;border-width:2px;border-color:var(--bfa-border);border-radius:var(--bfa-radius-lg);background:var(--bfa-bg);flex-direction:column;width:100%;max-width:480px;transition:border-color .2s,background .2s;display:flex}._bfa-upload:hover ._bfa-upload-inner,._bfa-upload.is-dragover ._bfa-upload-inner{border-color:var(--bfa-primary)}._bfa-upload.is-dragover ._bfa-upload-inner{background:var(--bfa-bg-secondary)}._bfa-upload-icon{color:var(--bfa-text-muted);opacity:.5}._bfa-upload-text{font-size:var(--main-text-base);color:var(--bfa-text);text-align:center;font-weight:500}._bfa-upload-hint{font-size:var(--main-text-sm);color:var(--bfa-text-muted);text-align:center}@media (max-width:768px){._bfa-upload{min-height:40vh}._bfa-upload-inner{padding:var(--main-space-8) var(--main-space-4);gap:var(--main-space-3)}._bfa-upload-icon svg{width:40px;height:40px}._bfa-upload-text{font-size:var(--main-text-sm)}._bfa-upload-hint{font-size:var(--main-text-xs)}}._bfa-toolbar{justify-content:space-between;align-items:center;gap:var(--main-space-3);padding:var(--main-space-2) var(--main-space-4);background:var(--bfa-toolbar-bg);border-bottom-style:solid;border-bottom-width:1px;border-bottom-color:var(--bfa-toolbar-border);flex-wrap:wrap;display:flex}._bfa-toolbar-left,._bfa-toolbar-right{align-items:center;gap:var(--main-space-2);flex-wrap:wrap;display:flex}._bfa-btn{justify-content:center;align-items:center;gap:var(--main-space-2);border-radius:var(--bfa-radius);font-size:var(--main-text-sm);cursor:pointer;color:var(--bfa-text);white-space:nowrap;-webkit-tap-highlight-color:transparent;background:0 0;border-style:none;border-width:0;padding:.5rem .75rem;font-weight:500;transition:opacity .15s,background .15s;display:inline-flex}._bfa-btn:hover{opacity:.85}._bfa-btn:disabled{opacity:.35;cursor:not-allowed}._bfa-btn-ghost{color:var(--bfa-text-muted)}._bfa-btn-ghost:hover:not(:disabled){color:var(--bfa-text);background:var(--bfa-bg-secondary)}._bfa-btn-ghost.is-active{color:var(--bfa-primary);background:rgba(var(--bfa-primary-rgb), .08)}._bfa-btn-primary{background:var(--bfa-primary);color:var(--main-bg-primary);box-shadow:0 2px 8px rgba(var(--bfa-primary-rgb), .25)}._bfa-btn-primary:hover{opacity:.9}._bfa-btn-group{gap:2px;display:inline-flex}._bfa-divider{background:var(--bfa-border);width:1px;height:20px;margin:0 var(--main-space-1)}._bfa-select{border-radius:var(--bfa-radius);border-style:solid;border-width:1px;border-color:var(--bfa-border);background:var(--bfa-bg);color:var(--bfa-text);font-size:var(--main-text-sm);cursor:pointer;padding:.375rem .5rem}._bfa-output-controls{align-items:center;gap:var(--main-space-3);display:flex}._bfa-quality-group{align-items:center;gap:var(--main-space-2);display:flex}._bfa-quality-label{font-size:var(--main-text-xs);color:var(--bfa-text-muted);white-space:nowrap}._bfa-quality-val{font-size:var(--main-text-xs);color:var(--bfa-text-muted);text-align:right;min-width:2rem}._bfa-intensity-group{align-items:center;gap:var(--main-space-2);display:flex}._bfa-intensity-label{font-size:var(--main-text-xs);color:var(--bfa-text-muted);white-space:nowrap}._bfa-intensity-val{font-size:var(--main-text-xs);color:var(--bfa-text-muted);text-align:right;min-width:1.5rem}._bfa-range-sm{cursor:pointer;width:80px;accent-color:var(--bfa-primary)}._bfa-btn-link{color:var(--bfa-primary);font-size:var(--main-text-xs);cursor:pointer;-webkit-tap-highlight-color:transparent;background:0 0;border-style:none;border-width:0;padding:0}._bfa-btn-link:hover{opacity:.8}@media (max-width:768px){._bfa-toolbar{padding:var(--main-space-2);gap:var(--main-space-2);justify-content:center}._bfa-toolbar-left,._bfa-toolbar-right{justify-content:center;gap:var(--main-space-1);flex:100%}._bfa-btn-label{display:none}._bfa-btn{min-width:40px;min-height:40px;padding:.5rem .625rem}._bfa-btn-group ._bfa-btn{min-width:44px}._bfa-intensity-group,._bfa-quality-group{flex:100%;justify-content:center}._bfa-range-sm{flex:1;min-width:100px;max-width:160px;height:28px}._bfa-output-controls{gap:var(--main-space-2);flex-wrap:wrap;flex:100%;justify-content:center}._bfa-divider{display:none}._bfa-select{font-size:var(--main-text-base);min-height:40px;padding:.375rem .625rem}}@media (max-width:480px){._bfa-toolbar{padding:var(--main-space-1)}._bfa-btn{padding:.5rem}}._bfa-canvas-area{background:var(--bfa-canvas-bg);flex-direction:column;flex:1;justify-content:center;align-items:center;min-height:300px;display:flex;position:relative;overflow:hidden}._bfa-canvas-wrapper{cursor:crosshair;-webkit-user-select:none;user-select:none;touch-action:none;-webkit-tap-highlight-color:transparent;line-height:0;display:inline-block;position:relative}._bfa-canvas-wrapper>canvas{touch-action:none;max-width:100%;max-height:100%}#_bfa-canvas-overlay{pointer-events:auto;touch-action:none;width:100%;height:100%;position:absolute;top:0;left:0}._bfa-hint{bottom:var(--main-space-4);width:auto;max-width:calc(100% - var(--main-space-4) * 2);padding:var(--main-space-1) var(--main-space-3);text-align:center;font-size:var(--main-text-xs);color:var(--bfa-hint-color);border-radius:var(--bfa-radius);pointer-events:none;white-space:nowrap;background:#00000059;transition:opacity .3s;position:absolute;left:50%;transform:translate(-50%)}._bfa-hint.is-hidden{opacity:0}@media (max-width:768px){._bfa-canvas-area{min-height:240px;max-height:calc(100vh - 280px)}._bfa-hint{white-space:normal;bottom:var(--main-space-2);font-size:11px}}@media (max-width:480px){._bfa-canvas-area{min-height:220px;max-height:calc(100vh - 320px)}}._bfa-status-bar{justify-content:center;align-items:center;gap:var(--main-space-2);padding:var(--main-space-2) var(--main-space-4);background:var(--bfa-toolbar-bg);border-top-style:solid;border-top-width:1px;border-top-color:var(--bfa-toolbar-border);font-size:var(--main-text-xs);color:var(--bfa-text-muted);text-align:center;flex-wrap:wrap;display:flex}._bfa-status-sep{color:var(--bfa-border)}@media (max-width:480px){._bfa-status-bar{padding:var(--main-space-2)}._bfa-btn-link{min-height:32px;padding:var(--main-space-1) var(--main-space-2)}}