:root{--sb-primary:var(--main-primary);--sb-primary-hover:var(--main-primary-hover);--sb-text:#1e293b;--sb-text-muted:#64748b;--sb-bg:#fff;--sb-bg-hover:#f8fafc;--sb-border:#e2e8f0;--sb-border-hover:#cbd5e1;--sb-radius:var(--main-radius);--sb-radius-lg:var(--main-radius-lg);--sb-shadow:0 1px 3px #0000001a;--sb-shadow-lg:0 4px 12px #0000001a}._sb-container{gap:var(--main-space-4);flex-direction:column;width:100%;max-width:1200px;margin:0 auto;display:flex}._sb-topbar{justify-content:flex-end;min-height:36px;display:flex}._sb-layout{gap:var(--main-space-6);grid-template-columns:280px 1fr;align-items:start;display:grid}._sb-btn{justify-content:center;align-items:center;gap:var(--main-space-2);padding:var(--main-space-3) var(--main-space-6);border-radius:var(--sb-radius);font-size:var(--main-text-sm);cursor:pointer;font-weight:500;transition:all .15s;display:inline-flex}._sb-btn:disabled{opacity:.5;cursor:not-allowed}._sb-btn-primary{background:var(--sb-primary);color:#fff;border:none;box-shadow:0 2px 8px #6366f140}._sb-btn-primary:hover:not(:disabled){opacity:.9}._sb-btn-secondary{background:var(--sb-bg);border-style:solid;border-width:1px;border-color:var(--sb-border);color:var(--sb-text)}._sb-btn-secondary:hover:not(:disabled){border-color:var(--sb-border-hover);background:var(--sb-bg-hover)}@media (max-width:900px){._sb-layout{grid-template-columns:1fr}._sb-settings{order:2}._sb-preview-area{order:1}}@media (max-width:768px){._sb-container{padding-left:1rem;padding-right:1rem}}._sb-settings{gap:var(--main-space-4);flex-direction:column;display:flex}._sb-section{background:var(--sb-bg);border-radius:var(--sb-radius-lg);padding:var(--main-space-5);border-style:solid;border-width:1px;border-color:var(--sb-border);box-shadow:var(--sb-shadow)}._sb-section-title{align-items:center;gap:var(--main-space-2);font-size:var(--main-text-sm);color:var(--sb-text);margin-bottom:var(--main-space-4);font-weight:600;display:flex}._sb-section-title svg{color:var(--sb-text-muted)}._sb-label{font-size:var(--main-text-xs);color:var(--sb-text-muted);margin-bottom:var(--main-space-2);font-weight:500;display:block}._sb-slider-row{align-items:center;gap:var(--main-space-3);display:flex}._sb-slider{-webkit-appearance:none;appearance:none;background:var(--sb-border);border-radius:3px;outline:none;flex:1;height:6px}._sb-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;background:var(--sb-primary);cursor:pointer;border-radius:50%;width:18px;height:18px;box-shadow:0 2px 4px #6366f14d}._sb-slider::-moz-range-thumb{background:var(--sb-primary);cursor:pointer;border:none;border-radius:50%;width:18px;height:18px;box-shadow:0 2px 4px #6366f14d}._sb-slider-val{min-width:48px;font-size:var(--main-text-sm);color:var(--sb-primary);text-align:right;font-weight:600}._sb-bg-presets{gap:var(--main-space-2);margin-bottom:var(--main-space-4);grid-template-columns:repeat(6,1fr);display:grid}._sb-bg-btn{aspect-ratio:1;border-radius:var(--sb-radius);cursor:pointer;border:2px solid #0000;width:100%;transition:all .15s}._sb-bg-btn:hover{opacity:.85}._sb-bg-btn.active{border-color:var(--sb-primary);box-shadow:0 0 0 2px #6366f14d}._sb-custom-bg{padding-top:var(--main-space-3);border-top-style:solid;border-top-width:1px;border-top-color:var(--sb-border)}._sb-color-row{align-items:center;gap:var(--main-space-2);display:flex}._sb-color-picker{border-style:solid;border-width:1px;border-color:var(--sb-border);border-radius:var(--sb-radius);cursor:pointer;background:var(--sb-bg);width:36px;height:36px;padding:2px}._sb-solid-toggle{background:var(--sb-bg-hover);border-style:solid;border-width:1px;border-color:var(--sb-border);border-radius:var(--sb-radius);width:36px;height:36px;color:var(--sb-text-muted);cursor:pointer;justify-content:center;align-items:center;transition:all .15s;display:flex}._sb-solid-toggle:hover{border-color:var(--sb-primary);color:var(--sb-primary)}._sb-solid-toggle.active{background:var(--sb-primary);border-color:var(--sb-primary);color:#fff}._sb-frame-options{gap:var(--main-space-2);display:flex}._sb-frame-btn{padding:var(--main-space-2) var(--main-space-3);background:var(--sb-bg-hover);border-style:solid;border-width:1px;border-color:var(--sb-border);border-radius:var(--sb-radius);font-size:var(--main-text-xs);color:var(--sb-text-muted);cursor:pointer;flex:1;font-weight:500;transition:all .15s}._sb-frame-btn:hover{border-color:var(--sb-primary);color:var(--sb-primary)}._sb-frame-btn.active{background:var(--sb-primary);border-color:var(--sb-primary);color:#fff}._sb-format-row{gap:var(--main-space-2);margin-bottom:var(--main-space-3);display:flex}._sb-format-btn{padding:var(--main-space-2) var(--main-space-3);background:var(--sb-bg-hover);border-style:solid;border-width:1px;border-color:var(--sb-border);border-radius:var(--sb-radius);font-size:var(--main-text-xs);color:var(--sb-text-muted);cursor:pointer;flex:1;font-weight:500;transition:all .15s}._sb-format-btn:hover{border-color:var(--sb-primary);color:var(--sb-primary)}._sb-format-btn.active{background:var(--sb-primary);border-color:var(--sb-primary);color:#fff}._sb-quality-row{padding-top:var(--main-space-3)}._sb-select{width:100%;padding:var(--main-space-2) var(--main-space-3);background:var(--sb-bg);border-style:solid;border-width:1px;border-color:var(--sb-border);border-radius:var(--sb-radius);font-size:var(--main-text-sm);color:var(--sb-text);cursor:pointer}._sb-select:focus{border-color:var(--sb-primary);outline:none}@media (max-width:900px){._sb-settings{flex-flow:wrap}._sb-section{flex:1;min-width:250px}}@media (max-width:600px){._sb-settings{flex-direction:column}._sb-section{min-width:100%}._sb-bg-presets{grid-template-columns:repeat(4,1fr)}}._sb-preview-area{gap:var(--main-space-4);flex-direction:column;min-height:400px;display:flex}._sb-upload-zone{background:var(--sb-bg);border-style:dashed;border-width:2px;border-color:var(--sb-border);border-radius:var(--sb-radius-lg);cursor:pointer;justify-content:center;align-items:center;min-height:400px;transition:all .2s;display:flex}._sb-upload-zone:hover,._sb-upload-zone.dragover{border-color:var(--sb-primary);background:#6366f105}._sb-upload-zone.dragover{border-style:solid}._sb-upload-content{align-items:center;gap:var(--main-space-3);padding:var(--main-space-6);text-align:center;flex-direction:column;display:flex}._sb-upload-content svg{color:var(--sb-border);transition:color .2s}._sb-upload-zone:hover ._sb-upload-content svg,._sb-upload-zone.dragover ._sb-upload-content svg{color:var(--sb-primary)}._sb-upload-text{font-size:var(--main-text-base);color:var(--sb-text);margin:0;font-weight:500}._sb-upload-hint{font-size:var(--main-text-sm);color:var(--sb-text-muted);margin:0}._sb-upload-formats{font-size:var(--main-text-xs);color:var(--sb-text-muted);padding:var(--main-space-2) var(--main-space-3);background:var(--sb-bg-hover);border-radius:var(--sb-radius);margin:0}._sb-canvas-wrapper{align-items:center;gap:var(--main-space-3);flex-direction:column;display:flex}._sb-canvas-container{box-shadow:var(--sb-shadow-lg);border-radius:var(--sb-radius);background:repeating-conic-gradient(#e5e7eb 0% 25%,#0000 0% 50%) 50%/16px 16px;justify-content:center;align-items:center;max-width:100%;display:flex;position:relative;overflow:hidden}._sb-canvas-container canvas{max-width:100%;max-height:550px}._sb-canvas-footer{justify-content:space-between;align-items:center;gap:var(--main-space-4);padding-top:var(--main-space-3);width:100%;display:flex}._sb-canvas-info{font-size:var(--main-text-sm);color:var(--sb-text-muted)}@media (max-width:600px){._sb-preview-area,._sb-upload-zone{min-height:300px}._sb-canvas-container canvas{max-height:350px}._sb-canvas-footer{align-items:stretch;gap:var(--main-space-3);flex-direction:column}._sb-canvas-info{text-align:center}}