:root{--pse-primary:#4D96FF;--pse-primary-dark:#3A7BD5;--pse-accent:#FF6B6B;--pse-bg:#ffffff;--pse-bg-alt:#f7f7f7;--pse-bg-card:#ffffff;--pse-border:#e0e0e0;--pse-border-light:#f0f0f0;--pse-text:#333333;--pse-text-light:#666666;--pse-text-muted:#999999;--pse-shadow:0 2px 8px rgba(0,0,0,0.08);--pse-shadow-lg:0 4px 16px rgba(0,0,0,0.12);--pse-radius:8px;--pse-radius-sm:4px;--pse-radius-lg:12px;--pse-ai-gradient:linear-gradient(135deg, #667eea 0%, #764ba2 100%);--pse-transition:0.2s ease}.pse-app{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;color:var(--pse-text);background:var(--pse-bg);max-width:1200px;margin:20px auto;border-radius:var(--pse-radius-lg);box-shadow:var(--pse-shadow-lg);overflow:hidden;direction:ltr;text-align:left}.pse-app *{box-sizing:border-box}.pse-header{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:var(--pse-bg-alt);border-bottom:1px solid var(--pse-border)}.pse-header-left{display:flex;align-items:center;gap:8px}.pse-logo{font-size:18px;font-weight:700;color:var(--pse-primary);letter-spacing:-.5px}.pse-version{font-size:11px;color:var(--pse-text-muted);background:var(--pse-border-light);padding:2px 6px;border-radius:10px}.pse-header-right{display:flex;align-items:center;gap:12px}.pse-save-status{font-size:12px;color:var(--pse-text-muted);transition:color var(--pse-transition)}.pse-save-status.pse-saved{color:#4CAF50;font-weight:600}.pse-design-title{font-size:14px;padding:6px 12px;border:1px solid var(--pse-border);border-radius:var(--pse-radius-sm);background:var(--pse-bg);color:var(--pse-text);width:200px;outline:none;transition:border-color var(--pse-transition)}.pse-design-title:focus{border-color:var(--pse-primary)}.pse-toolbar{display:flex;align-items:center;gap:8px;padding:8px 16px;background:var(--pse-bg);border-bottom:1px solid var(--pse-border);flex-wrap:wrap}.pse-toolbar-group{display:flex;align-items:center;gap:4px}.pse-toolbar-separator{width:1px;height:28px;background:var(--pse-border);margin:0 4px}.pse-tool-btn{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border:1px solid #fff0;border-radius:var(--pse-radius-sm);background:#fff0;color:var(--pse-text-light);cursor:pointer;transition:all var(--pse-transition);padding:0}.pse-tool-btn:hover{background:var(--pse-bg-alt);border-color:var(--pse-border);color:var(--pse-text)}.pse-tool-btn.active{background:var(--pse-primary);color:#fff;border-color:var(--pse-primary-dark)}.pse-action-btn{display:flex;align-items:center;justify-content:center;gap:4px;height:34px;padding:0 8px;border:1px solid #fff0;border-radius:var(--pse-radius-sm);background:#fff0;color:var(--pse-text-light);cursor:pointer;transition:all var(--pse-transition);font-size:12px}.pse-action-btn:hover:not(:disabled){background:var(--pse-bg-alt);border-color:var(--pse-border)}.pse-action-btn:disabled{opacity:.3;cursor:not-allowed}.pse-action-btn.pse-active{background:var(--pse-primary);color:#fff}.pse-color-group{gap:8px}.pse-current-color{display:flex;align-items:center;gap:6px}.pse-color-input{width:34px;height:34px;border:2px solid var(--pse-border);border-radius:var(--pse-radius-sm);cursor:pointer;padding:2px;background:var(--pse-bg)}.pse-color-input::-webkit-color-swatch-wrapper{padding:0}.pse-color-input::-webkit-color-swatch{border:none;border-radius:2px}.pse-color-hex{font-size:11px;font-family:'Courier New',monospace;color:var(--pse-text-muted);min-width:60px}.pse-palette-grid{display:grid;grid-template-columns:repeat(12,22px);gap:2px}.pse-palette-color{width:22px;height:22px;border:2px solid #fff0;border-radius:3px;cursor:pointer;transition:all var(--pse-transition);padding:0}.pse-palette-color:hover{transform:scale(1.2);border-color:var(--pse-text);z-index:1}.pse-palette-color.active{border-color:var(--pse-primary);box-shadow:0 0 0 2px var(--pse-primary);transform:scale(1.15)}.pse-palette-expand{font-size:11px;color:var(--pse-primary);background:none;border:none;cursor:pointer;padding:4px 8px}.pse-palette-expand:hover{text-decoration:underline}.pse-grid-settings{gap:8px}.pse-dimension-controls{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--pse-text-light)}.pse-dim-input{width:50px;padding:4px 6px;border:1px solid var(--pse-border);border-radius:var(--pse-radius-sm);font-size:12px;text-align:center;outline:none}.pse-dim-input:focus{border-color:var(--pse-primary)}.pse-main{display:flex;gap:0;min-height:500px}.pse-editor-panel{flex:1;display:flex;align-items:flex-start;justify-content:center;padding:20px;background:var(--pse-bg-alt);overflow:auto}.pse-canvas-wrapper{background:#fff;border-radius:var(--pse-radius);box-shadow:var(--pse-shadow);padding:2px;display:inline-block}.pse-pixel-canvas{display:block;cursor:crosshair;image-rendering:pixelated}.pse-preview-panel{width:320px;padding:16px;background:var(--pse-bg);border-left:1px solid var(--pse-border);overflow-y:auto}.pse-preview-section{margin-bottom:16px}.pse-preview-title{font-size:12px;font-weight:600;text-transform:uppercase;color:var(--pse-text-muted);margin:0 0 8px 0;letter-spacing:.5px}.pse-preview-2d-wrapper,.pse-preview-3d-wrapper{background:var(--pse-bg-alt);border-radius:var(--pse-radius);overflow:hidden;position:relative}.pse-preview-canvas{width:100%;display:block}.pse-fullscreen-btn{position:absolute;top:8px;right:8px;width:28px;height:28px;border:none;border-radius:var(--pse-radius-sm);background:rgb(255 255 255 / .9);cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity var(--pse-transition)}.pse-preview-3d-wrapper:hover .pse-fullscreen-btn{opacity:1}.pse-stitch-selector{margin-bottom:16px}.pse-stitch-title{font-size:11px;font-weight:600;text-transform:uppercase;color:var(--pse-text-muted);margin:0 0 6px 0}.pse-stitch-buttons{display:flex;gap:4px}.pse-stitch-btn{flex:1;padding:6px 4px;border:1px solid var(--pse-border);border-radius:var(--pse-radius-sm);background:var(--pse-bg);font-size:11px;cursor:pointer;transition:all var(--pse-transition);color:var(--pse-text-light)}.pse-stitch-btn:hover{border-color:var(--pse-primary);color:var(--pse-primary)}.pse-stitch-btn.active{background:var(--pse-primary);color:#fff;border-color:var(--pse-primary-dark)}.pse-color-count{font-size:13px;color:var(--pse-text-light);padding:8px 0}.pse-action-bar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:var(--pse-bg-alt);border-top:1px solid var(--pse-border);flex-wrap:wrap;gap:8px}.pse-action-group{display:flex;gap:6px;flex-wrap:wrap}.pse-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 16px;border:1px solid var(--pse-border);border-radius:var(--pse-radius-sm);font-size:13px;font-weight:500;cursor:pointer;transition:all var(--pse-transition);background:var(--pse-bg);color:var(--pse-text);line-height:1}.pse-btn:hover{border-color:var(--pse-text-light)}.pse-btn-primary{background:var(--pse-primary);color:#fff;border-color:var(--pse-primary-dark)}.pse-btn-primary:hover{background:var(--pse-primary-dark)}.pse-btn-secondary{background:var(--pse-bg);color:var(--pse-text)}.pse-btn-secondary:hover{background:var(--pse-bg-alt)}.pse-btn-ai{background:var(--pse-ai-gradient);color:#fff;border:none}.pse-btn-ai:hover{opacity:.9;transform:translateY(-1px)}.pse-btn-sm{padding:4px 10px;font-size:12px}.pse-export-dropdown{position:relative}.pse-export-menu{display:none;position:absolute;bottom:100%;right:0;background:var(--pse-bg-card);border:1px solid var(--pse-border);border-radius:var(--pse-radius);box-shadow:var(--pse-shadow-lg);min-width:200px;z-index:100;overflow:hidden;margin-bottom:4px}.pse-export-menu.pse-show{display:block}.pse-export-menu button{display:block;width:100%;padding:10px 16px;border:none;background:none;text-align:left;font-size:13px;cursor:pointer;transition:background var(--pse-transition);color:var(--pse-text)}.pse-export-menu button:hover{background:var(--pse-bg-alt);color:var(--pse-primary)}.pse-export-menu button+button{border-top:1px solid var(--pse-border-light)}.pse-modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgb(0 0 0 / .5);display:flex;align-items:center;justify-content:center;z-index:10000}.pse-modal-content{background:var(--pse-bg-card);border-radius:var(--pse-radius-lg);box-shadow:var(--pse-shadow-lg);width:90%;max-width:500px;max-height:80vh;overflow:auto}.pse-modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--pse-border)}.pse-modal-header h3{margin:0;font-size:16px}.pse-modal-close{background:none;border:none;font-size:24px;cursor:pointer;color:var(--pse-text-muted);padding:0 4px;line-height:1}.pse-modal-close:hover{color:var(--pse-text)}.pse-modal-body{padding:20px}.pse-modal-body label{display:block;font-size:13px;font-weight:500;margin-bottom:6px;color:var(--pse-text-light)}.pse-modal-body textarea{width:100%;padding:10px;border:1px solid var(--pse-border);border-radius:var(--pse-radius-sm);font-size:14px;resize:vertical;outline:none;font-family:inherit}.pse-modal-body textarea:focus{border-color:var(--pse-primary)}.pse-modal-body select{padding:6px 10px;border:1px solid var(--pse-border);border-radius:var(--pse-radius-sm);font-size:13px;outline:none}.pse-ai-options{margin-top:12px}.pse-modal-footer{display:flex;justify-content:flex-end;gap:8px;padding:16px 20px;border-top:1px solid var(--pse-border)}.pse-designs-list{max-height:400px;overflow-y:auto}.pse-design-item{display:flex;justify-content:space-between;align-items:center;padding:12px;border-bottom:1px solid var(--pse-border-light)}.pse-design-item:last-child{border-bottom:none}.pse-design-item-info{display:flex;flex-direction:column;gap:2px}.pse-design-item-info strong{font-size:14px}.pse-design-item-info span{font-size:12px;color:var(--pse-text-muted)}.pse-empty-msg{text-align:center;padding:30px;color:var(--pse-text-muted);font-size:14px}.pse-community-section{padding:30px 20px;background:var(--pse-bg-alt);border-top:1px solid var(--pse-border)}.pse-community-title{font-size:20px;font-weight:700;text-align:center;margin:0 0 20px 0;color:var(--pse-text)}.pse-community-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}.pse-community-card{background:var(--pse-bg-card);border-radius:var(--pse-radius);box-shadow:var(--pse-shadow);overflow:hidden;transition:transform var(--pse-transition),box-shadow 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var(--pse-border);border-radius:var(--pse-radius-sm);background:var(--pse-bg);cursor:pointer;font-size:13px;transition:all var(--pse-transition)}.pse-page-btn:hover{border-color:var(--pse-primary);color:var(--pse-primary)}.pse-page-btn.active{background:var(--pse-primary);color:#fff;border-color:var(--pse-primary-dark)}.pse-how-it-works{padding:40px 20px;text-align:center;background:var(--pse-bg);border-top:1px solid var(--pse-border)}.pse-how-it-works h2{font-size:22px;font-weight:700;margin:0 0 8px 0}.pse-how-it-works>p{color:var(--pse-text-muted);margin:0 0 30px 0;font-size:15px}.pse-steps{display:flex;justify-content:center;gap:20px;align-items:flex-start;flex-wrap:wrap}.pse-step{flex:1;max-width:250px;min-width:200px;text-align:center}.pse-step-num{display:inline-block;font-size:28px;font-weight:800;color:var(--pse-primary);opacity:.3;margin-bottom:8px}.pse-step h3{font-size:16px;font-weight:600;margin:0 0 8px 0}.pse-step p{font-size:13px;color:var(--pse-text-light);line-height:1.5;margin:0}.pse-step-arrow{font-size:24px;color:var(--pse-text-muted);align-self:center;padding-top:30px}.pse-login-required{text-align:center;padding:60px 20px;background:var(--pse-bg-alt);border-radius:var(--pse-radius-lg)}.pse-login-required p{font-size:16px;color:var(--pse-text-light);margin:0 0 16px 0}.pse-login-btn{display:inline-block;padding:10px 24px;background:var(--pse-primary);color:#fff;border-radius:var(--pse-radius-sm);text-decoration:none;font-weight:600;transition:background var(--pse-transition)}.pse-login-btn:hover{background:var(--pse-primary-dark);color:#fff}@media (max-width:768px){.pse-main{flex-direction:column}.pse-preview-panel{width:100%;border-left:none;border-top:1px solid var(--pse-border);display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:16px}.pse-stitch-selector,.pse-color-count{grid-column:1 / -1}.pse-toolbar{overflow-x:auto;flex-wrap:nowrap}.pse-color-group{flex-shrink:0}.pse-action-bar{flex-direction:column;align-items:stretch}.pse-action-group{justify-content:center}.pse-community-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}.pse-steps{flex-direction:column;align-items:center}.pse-step-arrow{transform:rotate(90deg);padding:0}}@media (max-width:480px){.pse-header{flex-direction:column;gap:8px}.pse-design-title{width:100%}.pse-preview-panel{grid-template-columns:1fr}.pse-community-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px}}.pse-theme-dark{--pse-bg:#1a1a2e;--pse-bg-alt:#16213e;--pse-bg-card:#1a1a2e;--pse-border:#2a2a4a;--pse-border-light:#1f1f3a;--pse-text:#e0e0e0;--pse-text-light:#a0a0b0;--pse-text-muted:#707080;--pse-shadow:0 2px 8px rgba(0,0,0,0.3);--pse-shadow-lg:0 4px 16px rgba(0,0,0,0.4)}.pse-theme-dark .pse-pixel-canvas{box-shadow:0 0 20px rgb(77 150 255 / .1)}#pse-preview-3d-wrapper:fullscreen{background:var(--pse-bg);display:flex;align-items:center;justify-content:center}#pse-preview-3d-wrapper:fullscreen .pse-preview-canvas{width:90vmin;height:90vmin}#pse-preview-3d-wrapper:fullscreen .pse-fullscreen-btn{opacity:1}.pse-modal-wide{max-width:640px;width:92%}.pse-import-body{display:flex;gap:20px;align-items:flex-start}.pse-import-preview-col{flex:1 1 55%;display:flex;flex-direction:column;align-items:center;gap:8px;min-width:0}.pse-import-preview-canvas{max-width:100%;border:1px solid var(--pse-border);border-radius:var(--pse-radius-sm);image-rendering:pixelated;background:var(--pse-bg-alt)}.pse-import-info{font-size:12px;color:var(--pse-text-light);margin:0;text-align:center}.pse-import-controls-col{flex:1 1 45%;display:flex;flex-direction:column;gap:16px}.pse-import-control label{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--pse-text);margin-bottom:6px;gap:8px}.pse-import-control input[type="range"]{width:100%;accent-color:var(--pse-primary)}.pse-import-toggle label{justify-content:flex-start;cursor:pointer;margin-bottom:0}.pse-import-toggle input[type="checkbox"]{accent-color:var(--pse-primary);width:16px;height:16px}.pse-app.pse-drag-over{outline:3px dashed var(--pse-primary);outline-offset:-3px}.pse-stats-panel{background:var(--pse-bg-alt);border:1px solid var(--pse-border);border-radius:var(--pse-radius);padding:12px 14px}.pse-stats-title{margin:0 0 8px;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--pse-text-light)}.pse-stats-list{margin:0;display:flex;flex-direction:column;gap:6px}.pse-stat-row{display:flex;justify-content:space-between;align-items:baseline;gap:8px}.pse-stat-row dt{font-size:12px;color:var(--pse-text-muted)}.pse-stat-row dd{margin:0;font-size:13px;font-weight:600;color:var(--pse-text);font-variant-numeric:tabular-nums}@media (max-width:640px){.pse-import-body{flex-direction:column}.pse-import-preview-col,.pse-import-controls-col{flex:1 1 100%;width:100%}}