:root{--color-bg: #0f0f13;--color-surface: #1a1a24;--color-surface-hover: #242434;--color-border: #2a2a3a;--color-primary: #018eee;--color-primary-hover: #1a9df5;--color-primary-dim: rgba(1, 142, 238, .15);--color-text: #e8e6f0;--color-text-secondary: #9996a8;--color-text-hint: #6b6880;--color-accent: #ff6b9d;--color-success: #4ecdc4;--color-danger: #ff6b6b;--color-grid-line: rgba(1, 142, 238, .7);--radius: 8px;--radius-lg: 12px;--shadow: 0 2px 12px rgba(0, 0, 0, .3);--font-mono: "SF Mono", "Fira Code", monospace}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}#app{max-width:1200px;margin:0 auto;padding:24px 20px 60px}.app-header{text-align:center;padding:32px 0 24px}.app-header h1{font-size:28px;font-weight:700;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.app-header .subtitle{color:var(--color-text-secondary);font-size:14px;margin-top:6px}.section{margin-bottom:32px}.section-title{font-size:18px;font-weight:600;margin-bottom:16px;color:var(--color-text)}.hidden{display:none!important}.upload-zone{border:2px dashed var(--color-border);border-radius:var(--radius-lg);padding:48px 24px;text-align:center;cursor:pointer;transition:border-color .2s,background .2s;background:var(--color-surface)}.upload-zone:hover,.upload-zone.dragover{border-color:var(--color-primary);background:var(--color-primary-dim)}.upload-zone__icon{color:var(--color-text-hint);margin-bottom:12px}.upload-zone__content p{color:var(--color-text-secondary);font-size:14px}.upload-zone__link{color:var(--color-primary);cursor:pointer;text-decoration:underline}.upload-zone__hint{font-size:12px!important;color:var(--color-text-hint)!important;margin-top:4px}.editor-layout{display:flex;gap:20px;align-items:flex-start}.editor-sidebar{width:220px;flex-shrink:0;display:flex;flex-direction:column;gap:16px}.editor-main{flex:1;min-width:0}.controls-panel{background:var(--color-surface);border-radius:var(--radius);padding:16px;border:1px solid var(--color-border)}.controls-panel h3{font-size:13px;font-weight:600;color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:12px}.preset-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px}.preset-btn{padding:8px 12px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg);color:var(--color-text);font-size:13px;cursor:pointer;transition:all .15s;font-family:var(--font-mono)}.preset-btn:hover{border-color:var(--color-primary);background:var(--color-primary-dim)}.preset-btn.active{border-color:var(--color-primary);background:var(--color-primary-dim);color:var(--color-primary)}.custom-input-row{display:flex;align-items:center;gap:8px;margin-top:8px}.custom-input-row label{font-size:13px;color:var(--color-text-secondary);white-space:nowrap}.custom-input-row input{width:52px;padding:6px 8px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg);color:var(--color-text);font-size:13px;text-align:center;font-family:var(--font-mono)}.custom-input-row input:focus{outline:none;border-color:var(--color-primary)}.custom-input-row .separator{color:var(--color-text-hint);font-size:14px}.drag-mode-section{margin-top:14px;padding-top:12px;border-top:1px solid var(--color-border)}.drag-mode-section label{display:block;font-size:12px;color:var(--color-text-hint);margin-bottom:8px}.drag-mode-row{display:grid;grid-template-columns:1fr 1fr;gap:6px}.toolbar-row{display:flex;gap:8px;margin-bottom:8px;align-items:center}.toolbar-row label{font-size:13px;color:var(--color-text-secondary);white-space:nowrap}.toolbar-select{flex:1;padding:6px 8px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-bg);color:var(--color-text);font-size:13px}.toolbar-select:focus{outline:none;border-color:var(--color-primary)}.btn{padding:8px 16px;border:none;border-radius:var(--radius);font-size:13px;font-weight:500;cursor:pointer;transition:all .15s;display:inline-flex;align-items:center;gap:6px}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover{border-color:var(--color-primary);background:var(--color-primary-dim)}.btn-full{width:100%;justify-content:center}.grid-overlay-container{position:relative;background:var(--color-surface);border-radius:var(--radius);border:1px solid var(--color-border);overflow:hidden;min-height:300px;display:flex;align-items:center;justify-content:center}.grid-overlay-container canvas{position:absolute;top:0;left:0}.grid-canvas-image{z-index:1}.grid-canvas-overlay{z-index:2;touch-action:none}.cell-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px}.cell-card{background:var(--color-surface);border:2px solid var(--color-border);border-radius:var(--radius);overflow:hidden;cursor:pointer;transition:border-color .15s,transform .15s;position:relative}.cell-card:hover{border-color:var(--color-primary);transform:translateY(-2px)}.cell-card.selected{border-color:var(--color-primary);box-shadow:0 0 0 2px var(--color-primary-dim)}.cell-card__preview{aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:var(--color-bg);padding:4px}.cell-card__preview canvas,.cell-card__preview img{max-width:100%;max-height:100%;object-fit:contain}.cell-card__footer{display:flex;align-items:center;border-top:1px solid var(--color-border)}.cell-card__label{flex:1;padding:6px 8px;font-size:11px;color:var(--color-text-secondary);text-align:center;font-family:var(--font-mono)}.cell-card__dl-group{display:flex;gap:1px;padding:3px 4px 3px 0}.cell-card__dl-btn{padding:2px 6px;border:1px solid var(--color-border);border-radius:4px;background:var(--color-bg);color:var(--color-text-hint);cursor:pointer;font-size:10px;font-family:var(--font-mono);font-weight:600;line-height:1.3;transition:all .15s;opacity:0}.cell-card:hover .cell-card__dl-btn{opacity:1}.cell-card__dl-btn:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-dim)}.cell-card__dl-btn.last-used{border-color:var(--color-primary);color:var(--color-primary)}.cell-card__check{position:absolute;top:4px;left:4px;width:22px;height:22px;border-radius:50%;background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;opacity:0;transition:opacity .15s}.cell-card.selected .cell-card__check{opacity:1}.progress-overlay{position:fixed;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100}.progress-box{background:var(--color-surface);border-radius:var(--radius-lg);padding:32px 40px;text-align:center;box-shadow:var(--shadow)}.progress-spinner{width:36px;height:36px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 16px}@keyframes spin{to{transform:rotate(360deg)}}#progress-text{font-size:14px;color:var(--color-text-secondary)}@media(max-width:768px){.editor-layout{flex-direction:column}.editor-sidebar{width:100%;flex-direction:row;flex-wrap:wrap}.editor-sidebar .controls-panel{flex:1;min-width:200px}.cell-gallery{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px}#app{padding:12px 12px 40px}.app-header{padding:16px 0}.app-header h1{font-size:22px}.upload-zone{padding:32px 16px}}