*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;line-height:1.5}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;padding:0;background-color:#f8f9fa;color:#212529;overflow:hidden}#root{width:100vw;height:100vh;overflow:hidden}button{font-family:inherit;font-size:inherit;line-height:inherit;margin:0;overflow:visible;text-transform:none;background:transparent;border:0;cursor:pointer}button:focus{outline:2px solid #007bff;outline-offset:2px}input,select,textarea{font-family:inherit;font-size:inherit;line-height:inherit;margin:0}input:focus,select:focus,textarea:focus{outline:2px solid #007bff;outline-offset:2px}ul,ol{list-style:none}a{color:inherit;text-decoration:none}a:focus{outline:2px solid #007bff;outline-offset:2px}h1,h2,h3,h4,h5,h6{margin:0;font-weight:600}p{margin:0}img{max-width:100%;height:auto}table{border-collapse:collapse;border-spacing:0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1;border-radius:4px}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a8a8a8}@media print{*{background:transparent!important;color:#000!important;box-shadow:none!important;text-shadow:none!important}}@media (prefers-contrast: high){*{border-color:currentColor!important}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.tools-toolbar{display:flex;justify-content:center}.tool-buttons{display:flex;gap:10px}.tool-button{display:flex;justify-content:center;align-items:center;width:40px;height:40px;border:1px solid #dee2e6;border-radius:8px;background:#fff;cursor:pointer;transition:all .2s ease}.tool-button:hover{background:#e9ecef;border-color:#adb5bd}.tool-button.active{background:#007bff;border-color:#007bff;color:#fff}.tool-icon{font-size:18px}color: white; } .tool-button.active:hover{background:#0056b3;border-color:#0056b3}.tool-icon{font-size:16px;min-width:20px;text-align:center}.tool-name{font-weight:500;flex:1;text-align:left}.item-palette{display:flex;flex-direction:column;height:100%;background:#fff;box-shadow:1px 0 5px #0000001a;position:relative;width:260px;min-width:260px}.palette-header{display:flex;justify-content:space-between;align-items:center;padding:10px 15px;background:#6b46c1;color:#fff}.palette-header h3{margin:0;font-size:16px;font-weight:600;white-space:nowrap}.search-bar{display:flex;align-items:center;padding:8px 12px;background:#f5f2fa;border-bottom:1px solid #e5e0ec;position:relative}.search-input{width:100%;padding:8px 30px 8px 12px;border:1px solid #d2c5e9;border-radius:4px;font-size:13px;background:#fff;transition:all .2s}.search-input:focus{outline:none;border-color:#9f7aea;box-shadow:0 0 0 2px #9f7aea40}.clear-search{position:absolute;right:20px;background:none;border:none;color:#777;cursor:pointer;padding:0;font-size:12px}.clear-search:hover{color:#333}.category-tabs{display:flex;flex-wrap:wrap;gap:4px;padding:8px;background:#f5f2fa;border-bottom:1px solid #e5e0ec}.category-tab{display:flex;align-items:center;gap:6px;padding:6px 10px;border:none;border-radius:4px;background:#fff;cursor:pointer;font-size:13px;transition:all .2s;box-shadow:0 1px 2px #0000000d;flex:1;min-width:70px;justify-content:center}.category-tab:hover{background-color:#f8f5ff;transform:translateY(-1px);box-shadow:0 2px 4px #0000001a}.category-tab.active{background:#8a63d2;color:#fff;box-shadow:0 2px 4px #6b46c14d}.category-icon{font-size:14px}.category-name{font-weight:500;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.item-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(90px,1fr));gap:8px;padding:12px;overflow-y:auto;flex:1;background:#fafaff;align-content:flex-start}.item-button{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:8px;border:none;border-radius:6px;background:#fff;cursor:pointer;transition:all .2s;box-shadow:0 1px 3px #0000001a;height:auto;width:100%}.item-button:hover{transform:translateY(-2px);box-shadow:0 4px 8px #0000001a}.item-button.active{border:2px solid #6b46c1;padding:8px;box-shadow:0 0 0 2px #6b46c140}.item-preview{display:flex;justify-content:center;align-items:center;width:100%;height:50px;margin-bottom:6px;border-radius:4px;transition:all .2s}.item-shape{display:flex;justify-content:center;align-items:center;font-size:20px;border-radius:3px;box-shadow:0 2px 4px #00000026}.item-name{margin-top:6px;font-size:12px;text-align:center;font-weight:500;color:#444;width:100%;overflow:hidden;text-overflow:ellipsis;line-height:1.2;word-wrap:break-word;max-height:2.4em;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical}.item-button[data-category=platform] .item-shape{border:1px solid rgba(139,69,19,.3)}.item-button[data-category=collectible] .item-shape{border:1px solid rgba(255,215,0,.3)}.item-button[data-category=enemy] .item-shape{border:1px solid rgba(220,20,60,.3)}.item-button[data-category=hazard] .item-shape{border:1px solid rgba(255,69,0,.3)}.item-button[data-category=position] .item-shape{border:1px solid rgba(50,205,50,.3)}.drag-hint{padding:10px 15px;background:#f1e9ff;font-size:13px;text-align:center;border-top:1px solid #e5e0ec;color:#6b46c1}.no-items-found{grid-column:1 / -1;text-align:center;padding:20px;color:#666}.no-items-found p{margin-bottom:10px;font-style:italic}.no-items-found button{background:#6b46c1;color:#fff;border:none;padding:6px 12px;border-radius:4px;cursor:pointer;font-size:13px}.item-grid::-webkit-scrollbar{width:6px}.item-grid::-webkit-scrollbar-track{background:#f5f2fa;border-radius:3px}.item-grid::-webkit-scrollbar-thumb{background:#c1b4db;border-radius:3px}.item-grid::-webkit-scrollbar-thumb:hover{background:#9f7aea}@media (max-width: 768px){.item-palette:not(.collapsed){width:200px;min-width:200px}.category-tabs{flex-wrap:wrap}.category-tab{flex:0 0 calc(50% - 4px);padding:6px}.category-name{display:none}.item-grid{padding:8px;gap:8px}.search-input{padding:6px 30px 6px 10px;font-size:12px}}.view-toolbar{display:flex;align-items:center}.view-controls{display:flex;gap:8px}.view-button{display:flex;justify-content:center;align-items:center;width:36px;height:36px;border:1px solid #dee2e6;border-radius:8px;background:#fff;cursor:pointer;transition:all .2s ease}.view-button:hover{background:#e9ecef;border-color:#adb5bd}.view-button.active{background:#007bff;border-color:#007bff;color:#fff}.view-button:disabled{opacity:.5;cursor:not-allowed}.view-icon{font-size:16px}.history-tooltip{display:none;position:absolute;top:45px;right:10px;background:#000000b3;color:#fff;padding:5px 10px;border-radius:4px;font-size:12px;z-index:100}.view-toolbar:hover .history-tooltip{display:block}.file-operations{display:flex;align-items:center}.file-buttons{display:flex;gap:8px}.file-button{display:flex;justify-content:center;align-items:center;width:36px;height:36px;border:1px solid #dee2e6;border-radius:8px;background:#fff;cursor:pointer;transition:all .2s ease}.file-button:hover{background:#e9ecef;border-color:#adb5bd}.file-button:disabled{opacity:.5;cursor:not-allowed}.file-icon{font-size:16px}.loading-indicator{display:flex;align-items:center;margin-left:8px}.loading-spinner{display:inline-block;animation:spin 1s linear infinite;font-size:16px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.message{display:flex;align-items:center;margin-left:8px;font-size:16px}.message.success{color:#28a745}.message.error{color:#dc3545}.file-group{display:flex;flex-direction:column;gap:8px}.file-group h4{margin:0;font-size:12px;font-weight:600;color:#6c757d;text-transform:uppercase;letter-spacing:.5px}.message{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:4px;font-size:12px;font-weight:500;animation:slideIn .3s ease-out}.message.success{background-color:#d4edda;border:1px solid #c3e6cb;color:#155724}.message.error{background-color:#f8d7da;border:1px solid #f5c6cb;color:#721c24}.message-icon{font-size:14px}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.file-info{padding:8px 12px;background-color:#f8f9fa;border:1px solid #e9ecef;border-radius:4px;font-size:10px;color:#6c757d;line-height:1.4}.progress-bar{width:100%;height:4px;background-color:#e9ecef;border-radius:2px;overflow:hidden;margin-top:8px}.progress-fill{height:100%;background-color:#007bff;border-radius:2px;transition:width .3s ease}.format-indicator{display:inline-flex;align-items:center;justify-content:center;width:20px;height:16px;border-radius:2px;font-size:8px;font-weight:700;color:#fff;margin-left:auto}.format-indicator.json{background-color:#007bff}.format-indicator.csv{background-color:#28a745}@media (max-width: 1200px){.file-button{padding:8px 10px;font-size:11px}.file-icon{font-size:12px}.message,.loading-indicator{padding:6px 10px;font-size:11px}}@media (max-width: 768px){.file-operations{gap:12px}.file-group{gap:6px}.file-button{padding:6px 8px;font-size:10px;justify-content:center}.file-button span:not(.file-icon){display:none}.file-icon{font-size:16px}.file-info{font-size:9px;padding:6px 8px}.message{font-size:10px;padding:6px 8px}}.file-operations.drag-over{background-color:#e3f2fd;border:2px dashed #007bff;border-radius:8px;padding:16px}.file-operations.drag-over:before{content:"Drop file here to import";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:#007bffe6;color:#fff;padding:8px 16px;border-radius:4px;font-size:12px;font-weight:500;pointer-events:none;z-index:10}.file-validation-error{background-color:#f8d7da;border:1px solid #f5c6cb;color:#721c24;padding:8px 12px;border-radius:4px;font-size:11px;margin-top:8px}.file-button.success{animation:successPulse .6s ease-out}@keyframes successPulse{0%{transform:scale(1);background-color:#fff}50%{transform:scale(1.05);background-color:#d4edda}to{transform:scale(1);background-color:#fff}}.app-header{background-color:#343a40;color:#fff;border-bottom:1px solid #495057;z-index:1000;min-height:60px}.header-content{display:flex;align-items:center;justify-content:space-between;padding:8px 20px;gap:20px;min-height:60px}.header-left{flex-shrink:0}.header-center{flex:1;display:flex;justify-content:center;min-width:0}.header-right{flex-shrink:0}.app-title{display:flex;align-items:center;gap:12px;margin:0;font-size:18px;font-weight:600;color:#fff;white-space:nowrap}.title-icon{font-size:22px}.level-info-compact{display:flex;flex-direction:column;align-items:center;gap:4px;max-width:100%}.level-name-section,.name-display-container{display:flex;align-items:center;gap:8px}.level-name{font-size:16px;font-weight:600;color:#fff;cursor:pointer;padding:4px 8px;border-radius:4px;transition:background-color .2s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:300px}.level-name:hover{background-color:#ffffff1a}.edit-name-button{background:none;border:none;color:#adb5bd;cursor:pointer;padding:4px;border-radius:3px;font-size:12px;transition:all .2s}.edit-name-button:hover{background-color:#ffffff1a;color:#fff}.name-edit-container{display:flex;align-items:center;gap:6px}.name-input{background:#ffffffe6;border:1px solid #adb5bd;border-radius:4px;padding:6px 10px;font-size:14px;color:#333;min-width:200px;max-width:300px}.name-input:focus{outline:none;border-color:#007bff;box-shadow:0 0 0 2px #007bff40}.name-button{background:none;border:none;color:#adb5bd;cursor:pointer;padding:4px 6px;border-radius:3px;font-size:12px;transition:all .2s}.name-button.confirm:hover{background-color:#28a74533;color:#28a745}.name-button.cancel:hover{background-color:#dc354533;color:#dc3545}.level-stats-compact{display:flex;align-items:center;gap:12px;font-size:13px;color:#adb5bd;flex-wrap:wrap;justify-content:center}.stat-item{display:flex;align-items:center;gap:4px;padding:2px 6px;background:#ffffff0d;border-radius:12px;white-space:nowrap;font-weight:500}.category-counts{display:flex;align-items:center;gap:4px;max-width:200px;overflow:hidden;text-overflow:ellipsis}.version{font-size:11px;background-color:#6c757d;color:#fff;padding:3px 8px;border-radius:12px;font-weight:500}@media (max-width: 1200px){.app-title{font-size:16px}.title-icon{font-size:18px}.level-stats-compact{gap:8px;font-size:12px}.stat-item{padding:2px 4px}}@media (max-width: 768px){.header-content{flex-direction:column;padding:8px 15px;gap:8px}.header-left,.header-center,.header-right{width:100%}.header-center{justify-content:center}.level-stats-compact{gap:6px;font-size:11px}.category-counts{display:none}.level-name{max-width:200px;font-size:14px}}@media (max-width: 480px){.app-title{font-size:14px}.level-stats-compact{flex-wrap:wrap;justify-content:center;gap:4px}.stat-item{font-size:10px;padding:1px 4px}}.canvas-container{flex:1;position:relative;overflow:hidden;background-color:#f0f0f0;border:1px solid #ccc}.canvas-container canvas{display:block;width:100%;height:100%;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.canvas-container canvas:focus{outline:none}.canvas-container .loading-overlay{position:absolute;inset:0;background-color:#fffc;display:flex;align-items:center;justify-content:center;font-size:18px;color:#666}.canvas-container .viewport-info{position:absolute;top:10px;left:10px;background-color:#000000b3;color:#fff;padding:8px 12px;border-radius:4px;font-family:monospace;font-size:12px;pointer-events:none;z-index:100}.canvas-container .grid-toggle{position:absolute;top:10px;right:10px;background-color:#000000b3;color:#fff;border:none;padding:8px 12px;border-radius:4px;cursor:pointer;font-size:12px;z-index:100}.canvas-container .grid-toggle:hover{background-color:#000000e6}.canvas-container .grid-toggle.active{background-color:#007bffcc}.canvas-container .zoom-controls{position:absolute;bottom:10px;right:10px;display:flex;flex-direction:column;gap:4px;z-index:100}.canvas-container .zoom-controls button{background-color:#000000b3;color:#fff;border:none;width:32px;height:32px;border-radius:4px;cursor:pointer;font-size:16px;display:flex;align-items:center;justify-content:center}.canvas-container .zoom-controls button:hover{background-color:#000000e6}.canvas-container .zoom-controls button:disabled{opacity:.5;cursor:not-allowed}.canvas-container .coordinates{position:absolute;bottom:10px;left:10px;background-color:#000000b3;color:#fff;padding:4px 8px;border-radius:4px;font-family:monospace;font-size:11px;pointer-events:none;z-index:100}.canvas-container .tool-hint{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background-color:#000c;color:#fff;padding:12px 16px;border-radius:8px;font-size:14px;pointer-events:none;z-index:100;max-width:300px;text-align:center}@media (max-width: 768px){.canvas-container .viewport-info,.canvas-container .coordinates{font-size:10px;padding:4px 6px}.canvas-container .zoom-controls button{width:28px;height:28px;font-size:14px}.canvas-container .grid-toggle{font-size:10px;padding:6px 8px}}.history-panel{background:#f8f9fa;border:1px solid #e9ecef;border-radius:8px;padding:12px;margin-bottom:12px;max-height:250px;overflow-y:auto}.history-panel-header{margin-bottom:8px}.history-panel-header h3{font-size:16px;margin:0;padding:0;color:#495057}.history-list{display:flex;flex-direction:column;gap:12px}.history-past,.history-future{border-left:3px solid #ced4da;padding-left:8px}.history-past{border-color:#28a745}.history-future{border-color:#6c757d}.history-past h4,.history-future h4{font-size:14px;margin:0 0 6px;padding:0;color:#495057}.history-item{padding:4px 0;font-size:12px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px dashed #e9ecef}.history-description{font-weight:500}.history-time{color:#6c757d;font-size:10px}.history-past .history-item{background:#fff;color:#212529;border-radius:4px}.properties-panel{width:300px;height:100vh;background-color:#f8f9fa;border-left:1px solid #dee2e6;display:flex;flex-direction:column;overflow:hidden}.properties-header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid #dee2e6;background-color:#fff}.properties-header h3{margin:0;font-size:16px;font-weight:600;color:#495057}.delete-button{background-color:#dc3545;color:#fff;border:none;border-radius:4px;padding:6px 8px;cursor:pointer;font-size:14px;transition:background-color .2s ease}.delete-button:hover{background-color:#c82333}.properties-content{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:20px}.no-selection{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:#6c757d;text-align:center;padding:40px 20px}.no-selection-icon{font-size:48px;opacity:.5}.no-selection p{margin:0;font-size:14px;line-height:1.4}.property-section{background-color:#fff;border:1px solid #dee2e6;border-radius:6px;padding:16px;display:flex;flex-direction:column;gap:12px}.property-section h4{margin:0;font-size:14px;font-weight:600;color:#495057;text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid #e9ecef;padding-bottom:8px}.property-item{display:flex;align-items:center;gap:8px;font-size:12px}.property-item label{font-weight:500;color:#6c757d;min-width:60px;text-align:right}.property-item input,.property-item select{flex:1;padding:6px 8px;border:1px solid #ced4da;border-radius:4px;font-size:12px;background-color:#fff}.property-item input:focus,.property-item select:focus{outline:none;border-color:#007bff;box-shadow:0 0 0 2px #007bff40}.property-value{flex:1;font-family:monospace;color:#495057;background-color:#e9ecef;padding:6px 8px;border-radius:4px;font-size:11px}.property-unit{font-size:10px;color:#6c757d;min-width:50px;text-align:left}.property-row{display:flex;gap:12px}.property-row .property-item{flex:1}.property-row .property-item label{min-width:20px}.item-preview{display:flex;flex-direction:column;align-items:center;justify-content:center;height:80px;border-radius:6px;border:2px solid rgba(0,0,0,.1);color:#fff;text-shadow:1px 1px 2px rgba(0,0,0,.5);font-weight:600;gap:4px}.preview-label{font-size:12px;text-align:center}.preview-size{font-size:10px;opacity:.8;font-family:monospace}input[type=number]{-moz-appearance:textfield}input[type=number]::-webkit-outer-spin-button,input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml;charset=US-ASCII,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'><path fill='%23666' d='M2 0L0 2h4zM2 5L0 3h4z'/></svg>");background-repeat:no-repeat;background-position:right 8px center;background-size:8px;padding-right:24px}.property-item.invalid input,.property-item.invalid select{border-color:#dc3545;background-color:#f8d7da}.property-item.valid input,.property-item.valid select{border-color:#28a745;background-color:#d4edda}@media (max-width: 1200px){.properties-panel{width:250px}.properties-content{padding:12px;gap:16px}.property-section{padding:12px}.property-item{font-size:11px}.property-item label{min-width:50px}.property-item input,.property-item select{font-size:11px;padding:4px 6px}}@media (max-width: 768px){.properties-panel{width:100%;height:auto;max-height:40vh;border-left:none;border-top:1px solid #dee2e6}.properties-content{gap:12px}.property-section{padding:10px}.property-item{flex-direction:column;align-items:stretch;gap:4px}.property-item label{min-width:auto;text-align:left;font-size:11px}.property-row{flex-direction:column}.item-preview{height:60px}.preview-label{font-size:10px}.preview-size{font-size:9px}}.properties-content::-webkit-scrollbar{width:6px}.properties-content::-webkit-scrollbar-track{background:#f1f1f1}.properties-content::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:3px}.properties-content::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.property-item input.changed,.property-item select.changed{animation:propertyChange .3s ease-out}@keyframes propertyChange{0%{background-color:#fff3cd;border-color:#ffeaa7}to{background-color:#fff;border-color:#ced4da}}.property-item[title]{cursor:help}.property-item[title]:hover label{color:#007bff}input[type=range]{flex:1;height:20px;background:transparent;cursor:pointer}input[type=range]::-webkit-slider-track{width:100%;height:4px;background:#ddd;border-radius:2px}input[type=range]::-webkit-slider-thumb{appearance:none;height:16px;width:16px;border-radius:50%;background:#007bff;cursor:pointer;margin-top:-6px}input[type=range]::-moz-range-track{width:100%;height:4px;background:#ddd;border-radius:2px;border:none}input[type=range]::-moz-range-thumb{height:16px;width:16px;border-radius:50%;background:#007bff;cursor:pointer;border:none}.app{display:flex;flex-direction:column;height:100vh;width:100vw;overflow:hidden;background-color:#f8f9fa;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app-header{grid-area:header;background-color:#343a40;color:#fff;border-bottom:1px solid #495057;z-index:1000;height:50px}.header-content{display:flex;align-items:center;justify-content:space-between;padding:0 20px;height:100%}.app-title{display:flex;align-items:center;gap:12px;margin:0;font-size:20px;font-weight:600;color:#fff}.title-icon{font-size:24px}.header-info{display:flex;align-items:center;gap:16px}.version{font-size:12px;background-color:#6c757d;color:#fff;padding:4px 8px;border-radius:12px;font-weight:500}.app-main{display:grid;grid-template-areas:"top-toolbar top-toolbar top-toolbar" "left-sidebar canvas-area right-sidebar";grid-template-columns:260px 1fr 300px;grid-template-rows:50px 1fr;flex:1;overflow:hidden;gap:0}.top-toolbar{grid-area:top-toolbar;background:#f8f9fa;border-bottom:1px solid #dee2e6;display:flex;justify-content:space-between;align-items:center;padding:0 15px;z-index:100}.top-left{display:flex;align-items:center}.top-center{display:flex;justify-content:center;flex:1}.top-right{display:flex;align-items:center}.left-sidebar{grid-area:left-sidebar;overflow-y:auto;background:#f8f9fa;border-right:1px solid #dee2e6}.canvas-area{grid-area:canvas-area;overflow:hidden;background-color:#fff;position:relative;display:flex}.right-sidebar{grid-area:right-sidebar;background:#f8f9fa;border-left:1px solid #dee2e6;overflow-y:auto}@media (max-width: 1200px){.app-title{font-size:18px}.title-icon{font-size:20px}.header-content,.footer-content{padding:10px 16px}.app-main{grid-template-columns:200px 1fr 250px}}@media (max-width: 768px){.app{flex-direction:column}.app-main{flex-direction:column;grid-template-areas:"top-toolbar top-toolbar top-toolbar" "canvas-area canvas-area canvas-area" "left-sidebar right-sidebar right-sidebar";grid-template-columns:1fr 1fr 1fr;grid-template-rows:50px 1fr 200px}.left-sidebar{border-right:none;border-bottom:1px solid #dee2e6}.right-sidebar{border-left:none}}@media (max-width: 480px){.header-content{padding:8px 12px}.app-title{font-size:16px}.title-icon{font-size:18px}.version{font-size:10px;padding:2px 6px}.footer-content{padding:6px 12px}.footer-button{font-size:11px;padding:3px 6px}.app-main{grid-template-areas:"top-toolbar" "canvas-area" "left-sidebar" "right-sidebar";grid-template-columns:1fr;grid-template-rows:50px 1fr 150px 150px}.left-sidebar,.right-sidebar{border:none;border-bottom:1px solid #dee2e6}}.left-sidebar::-webkit-scrollbar,.right-sidebar::-webkit-scrollbar{width:6px;height:6px}.left-sidebar::-webkit-scrollbar-track,.right-sidebar::-webkit-scrollbar-track{background:#f1f1f1;border-radius:3px}.left-sidebar::-webkit-scrollbar-thumb,.right-sidebar::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:3px}.left-sidebar::-webkit-scrollbar-thumb:hover,.right-sidebar::-webkit-scrollbar-thumb:hover{background:#a8a8a8}@media print{.app-header,.app-footer,.sidebar-left,.sidebar-right{display:none!important}.app-main{height:100vh}.editor-workspace{width:100%!important;height:100%!important}}@media (prefers-contrast: high){.app{background-color:#fff}.app-header{background-color:#000;border-bottom-color:#666}.app-footer{background-color:#f0f0f0;border-top-color:#666}.sidebar-left,.sidebar-right{background-color:#f0f0f0;border-color:#666}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.app:focus-within .editor-workspace{outline:2px solid #007bff;outline-offset:-2px}.app.loading{cursor:wait}.app.loading *{pointer-events:none}.app.error{background-color:#f8d7da}.app.error .app-header{background-color:#dc3545}.app.success .app-header{background-color:#28a745}@media (prefers-color-scheme: dark){.app{background-color:#212529;color:#f8f9fa}.app-header{background-color:#1a1d20;border-bottom-color:#495057}.app-footer{background-color:#343a40;border-top-color:#495057;color:#adb5bd}.left-sidebar,.right-sidebar,.top-toolbar{background-color:#343a40;border-color:#495057}.canvas-area{background-color:#2d3338}.footer-button{color:#adb5bd}.footer-button:hover{background-color:#495057;color:#f8f9fa}}