:root{--c-bg: #f5f0eb;--c-card-bg: #ffffff;--c-card-alt: #fafaf7;--c-sidebar-bg: #fafaf7;--c-topbar-bg: #2d2d2d;--c-pink: #f8c3cd;--c-green: #a8e6cf;--c-text: #2d2d2d;--c-text-dim: #888888;--c-text-stats: #666666;--c-border: #2d2d2d;--c-border-light: #dddddd;--c-divider: #d0d0d0;--c-theme-icon: #1a1a1a;--c-white: #ffffff}.app.dark,html.dark,body.dark{--c-bg: #1a1a1a;--c-card-bg: #2d2d2d;--c-card-alt: #242424;--c-sidebar-bg: #2a2a2a;--c-topbar-bg: #2d2d2d;--c-pink: #c9b1e8;--c-green: #6ee7f0;--c-text: #eee8dd;--c-text-dim: #aaaaaa;--c-text-stats: #aaaaaa;--c-border: #555555;--c-border-light: #444444;--c-divider: #444444;--c-theme-icon: #ffffff}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:Cascadia Code,Noto Sans SC,monospace;font-size:16px;background:var(--c-bg);color:var(--c-text);transition:background .3s ease,color .3s ease}a{color:inherit;text-decoration:none}.app{display:grid;grid-template-columns:340px 1fr;grid-template-rows:48px 1fr;grid-template-areas:"topbar topbar" "sidebar content";height:100vh;overflow:hidden;background:var(--c-bg);transition:background .3s ease}.topbar{grid-area:topbar;background:#2d2d2d;display:flex;align-items:center;justify-content:space-between;padding:0 20px;z-index:100}.topbar-title{color:#fff;font-size:18px;font-weight:700;letter-spacing:2px}.topbar-actions{display:flex;align-items:center;gap:12px}.model-status{font-size:11px;color:#888;padding:3px 10px;border:1px solid #888}.model-status.loaded{color:#a8e6cf;border-color:#a8e6cf}.model-status.error{color:#f8c3cd;border-color:#f8c3cd}.icon-btn{width:32px;height:32px;border-radius:16px;display:flex;align-items:center;justify-content:center;cursor:pointer;border:1px solid #888;font-family:inherit;font-size:16px;padding:0;line-height:1}.theme-btn{background:var(--c-card-alt);color:var(--c-theme-icon);transition:background .3s ease,color .3s ease}.sidebar-panel{grid-area:sidebar;background:var(--c-sidebar-bg);border-right:1px solid var(--c-border-light);display:flex;flex-direction:column;overflow-y:auto;height:100%;transition:background .3s ease}.panel-section{padding:16px;display:flex;flex-direction:column;gap:12px}.section-header{padding:6px 14px;background:#2d2d2d;font-size:13px;font-weight:700;color:#fff;letter-spacing:1px;display:flex;align-items:center;justify-content:space-between}.btn-header{padding:2px 10px;border:1px solid #888;border-radius:4px;font-family:inherit;font-size:10px;font-weight:700;cursor:pointer;background:transparent;color:#aaa;transition:background .2s ease,color .2s ease}.btn-header:hover{background:#555;color:#fff}.btn-header:disabled{opacity:.3;cursor:not-allowed}.section-header.pink{background:var(--c-pink);color:#2d2d2d}.section-header.green{background:var(--c-green);color:#2d2d2d}.canvas-wrapper{display:flex;justify-content:center;padding:4px 0}.draw-canvas{border:2px solid var(--c-border);background:#000;cursor:crosshair;border-radius:0;max-width:100%;height:auto}.btn-row{display:flex;gap:8px}.btn{padding:6px 16px;border:1px solid var(--c-border);border-radius:4px;font-family:inherit;font-size:12px;font-weight:700;cursor:pointer;background:var(--c-card-bg);color:var(--c-text);transition:background .2s ease}.btn:hover{background:var(--c-card-alt)}.btn-accent{background:var(--c-pink);color:#2d2d2d}.btn-accent:hover{background:var(--c-green)}.btn:disabled{opacity:.4;cursor:not-allowed}.brush-size-row{display:flex;align-items:center;gap:10px;font-size:11px}.brush-size-row label{color:var(--c-text-dim);min-width:60px}.brush-size-row input{flex:1;accent-color:var(--c-pink)}.brush-size-row span{color:var(--c-text);font-weight:700;min-width:20px;text-align:right}.content-area{grid-area:content;overflow-y:auto;padding:20px 24px;height:100%;display:flex;flex-direction:column;gap:10px}.layers-grid{display:grid;gap:10px;grid-template-columns:repeat(2,1fr)}.layers-grid.cols-3{grid-template-columns:repeat(3,1fr)}.viz-split{display:flex;gap:10px}.viz-left{flex:1;display:flex;flex-direction:column;gap:10px}.viz-right{flex:1;display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.viz-right .flat-card{grid-column:1 / -1}.card-body{padding:4px;display:flex;justify-content:center;align-items:stretch;background:var(--c-card-alt);transition:background .3s ease}.card-body canvas{display:block;width:100%;height:100%;image-rendering:pixelated;object-fit:fill}.layer-card{background:var(--c-card-bg);border:2px solid var(--c-border);transition:background .3s ease}.card-header{padding:6px 14px;background:#2d2d2d;display:flex;align-items:center;justify-content:space-between;font-size:12px;font-weight:700;color:#fff;letter-spacing:1px}.card-header .shape{font-size:10px;font-weight:400;color:#888;letter-spacing:0}.card-body{padding:6px 8px;display:flex;justify-content:center;align-items:center;background:var(--c-card-alt);transition:background .3s ease}.card-body canvas{display:block;max-width:100%;height:auto}.prediction-card{background:var(--c-card-bg);border:3px solid var(--c-border);margin-bottom:20px}.prediction-header{padding:8px 16px;background:#2d2d2d;display:flex;align-items:center;justify-content:space-between}.prediction-header .pred-title{font-size:13px;font-weight:700;color:#fff;letter-spacing:1px}.prediction-header .pred-digit{padding:2px 12px;background:var(--c-green);border:1px solid var(--c-border);font-size:16px;font-weight:700;color:#2d2d2d;white-space:nowrap;min-width:100px;text-align:center}.pred-result{font-size:11px;font-weight:700;color:var(--c-text);white-space:nowrap;min-width:80px;text-align:center}.prediction-body{padding:12px 16px;background:var(--c-card-alt);display:flex;flex-direction:column;align-items:center;gap:8px}.pred-meta{display:flex;align-items:center;gap:8px;flex-wrap:nowrap}.pred-result{font-size:11px;font-weight:700;color:var(--c-text)}.pred-circles{display:flex;gap:10px;justify-content:center;flex-wrap:nowrap}.pred-circle{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;border:2px solid transparent;transition:background .25s ease,border-color .25s ease,color .25s ease}.pred-circle.active{border-color:var(--c-border);box-shadow:0 0 0 2px var(--c-pink)}.pred-conf{font-size:14px;font-weight:700;color:var(--c-text);letter-spacing:1px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:60px 20px;color:var(--c-text-dim);font-size:13px}.empty-state .empty-icon{font-size:36px;color:var(--c-pink)}.loading-overlay{display:flex;align-items:center;justify-content:center;gap:8px;padding:20px;font-size:12px;color:var(--c-text-dim)}.spinner{width:16px;height:16px;border:2px solid var(--c-border-light);border-top-color:var(--c-pink);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--c-pink);border-radius:0}::-webkit-scrollbar-thumb:hover{background:var(--c-text)}*{scrollbar-width:thin;scrollbar-color:var(--c-pink) transparent}@media(max-width:900px){.app{grid-template-columns:1fr;grid-template-rows:48px auto 1fr;grid-template-areas:"topbar" "sidebar" "content"}.sidebar-panel{border-right:none;border-bottom:1px solid var(--c-border-light);max-height:420px}.content-area{padding:12px}.viz-split{flex-direction:column}.layers-grid{grid-template-columns:1fr}.layers-grid.cols-3{grid-template-columns:repeat(3,1fr)}}.mobile-only{display:none}@media(max-width:480px){.mobile-only{display:block}.desktop-only{display:none!important}.app{grid-template-rows:48px auto 1fr}.desktop-only{display:none}.sidebar-panel{max-height:none;overflow:visible;display:flex;flex-direction:row;align-items:stretch;gap:6px;padding:6px}.sidebar-panel>.panel-section{flex:1 1 55%;min-width:0}.sidebar-panel>.mobile-only{flex:0 1 45%;min-width:0}.panel-section{gap:4px}.canvas-wrapper{flex:1;display:flex;align-items:center;justify-content:center}.sidebar-panel .mobile-only{flex-shrink:0;max-width:45%}.draw-canvas{width:100%!important;max-width:280px;height:auto!important;border-width:1px}.canvas-wrapper{padding:0}.content-area{padding:6px;gap:8px}.viz-split{flex-direction:column}.viz-left .layers-grid{grid-template-columns:repeat(3,1fr);gap:4px}.viz-left .layers-grid.cols-3{grid-template-columns:repeat(3,1fr)}.flat-card{display:none}.viz-right{display:flex;flex-direction:row;gap:6px}.viz-right .layer-card{flex:1;min-width:0}.card-body canvas{width:auto;height:auto;max-width:100%}.pred-circles{display:grid;grid-template-columns:repeat(2,auto);gap:4px;justify-content:center}.pred-circle{width:24px;height:24px;font-size:11px}.prediction-header{font-size:9px;padding:3px 6px;flex-wrap:nowrap}.prediction-header .pred-digit{font-size:9px;padding:1px 4px;white-space:nowrap}.prediction-body{padding:4px}.prediction-card{margin-bottom:0}.pred-meta .pred-result{font-size:10px}.pred-meta{gap:4px}.card-header{font-size:9px;padding:4px 8px}.card-body{padding:2px}.section-header{font-size:11px}.btn-header{font-size:9px;padding:1px 8px}}