:root{--bg-dark: #0f172a;--bg-panel: rgba(30, 41, 59, .7);--bg-panel-hover: rgba(51, 65, 85, .8);--text-main: #f8fafc;--text-muted: #94a3b8;--accent: #3b82f6;--accent-hover: #60a5fa;--border: rgba(255, 255, 255, .1);--layer-copper: #d97706;--layer-soldermask: #059669;--layer-silkscreen: #f8fafc;--layer-paste: #94a3b8;--layer-drill: #ef4444;--layer-outline: #a855f7;--layer-default: #3b82f6}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background-color:var(--bg-dark);color:var(--text-main);min-height:100vh;overflow:hidden;background-image:radial-gradient(circle at 15% 50%,rgba(59,130,246,.15),transparent 25%),radial-gradient(circle at 85% 30%,rgba(168,85,247,.15),transparent 25%)}h1,h2,h3{font-family:Outfit,sans-serif}.app-layout{display:flex;height:100vh;width:100vw}.sidebar{width:320px;min-width:320px;background:var(--bg-panel);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-right:1px solid var(--border);display:flex;flex-direction:column;z-index:10;box-shadow:4px 0 24px #0003}.app-header{padding:24px;border-bottom:1px solid var(--border)}.app-header h1{font-size:1.5rem;font-weight:700;display:flex;align-items:center;gap:8px}.subtitle{color:var(--text-muted);font-size:.9rem;margin-top:4px}.controls-section{padding:24px;flex:1;overflow-y:auto}.controls-section h2{font-size:1.1rem;margin-bottom:16px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px}.layers-list{display:flex;flex-direction:column;gap:12px}.layer-item{display:flex;align-items:center;justify-content:space-between;padding:12px;background:#ffffff0d;border-radius:8px;border:1px solid transparent;transition:all .2s ease}.layer-item:hover{background:var(--bg-panel-hover);border-color:var(--border)}.layer-item[draggable=true]{cursor:grab}.layer-item[draggable=true]:active{cursor:grabbing}.layer-item.dragging{opacity:.5;border:1px dashed var(--accent);background:#3b82f61a}.layer-item.drag-over-top{border-top:2px solid var(--accent)}.layer-item.drag-over-bottom{border-bottom:2px solid var(--accent)}.layer-drag-handle{cursor:grab;color:var(--text-muted);display:flex;align-items:center;justify-content:center;opacity:.5;transition:opacity .2s}.layer-item:hover .layer-drag-handle{opacity:1}.layers-header{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;font-size:.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px}.layer-info{display:flex;align-items:center;gap:10px;flex:1;overflow:hidden;min-width:0}.layer-color-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0;box-shadow:0 0 6px currentColor}.layer-icon{font-size:1rem;flex-shrink:0;opacity:.7}.layer-text{display:flex;flex-direction:column;overflow:hidden;min-width:0}.layer-type-badge{font-size:.65rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.layer-name{font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.toggle-switch{position:relative;display:inline-block;width:36px;height:20px}.toggle-switch input{opacity:0;width:0;height:0}.slider{position:absolute;cursor:pointer;inset:0;background-color:#fff3;transition:.3s;border-radius:20px}.slider:before{position:absolute;content:"";height:14px;width:14px;left:3px;bottom:3px;background-color:#fff;transition:.3s;border-radius:50%}input:checked+.slider{background-color:var(--accent)}input:focus+.slider{box-shadow:0 0 1px var(--accent)}input:checked+.slider:before{transform:translate(16px)}.empty-state{text-align:center;padding:32px 16px;color:var(--text-muted);border:1px dashed var(--border);border-radius:12px;background:#0003}.empty-icon{opacity:.4;margin-bottom:12px}.sidebar-actions{display:flex;gap:8px;margin-top:16px}.secondary-btn{background:#ffffff14;color:var(--text-main);border:1px solid var(--border);padding:8px 12px;border-radius:6px;font-family:inherit;font-size:.85rem;font-weight:500;cursor:pointer;flex:1;transition:background .2s}.secondary-btn:hover{background:#ffffff26}.danger-btn{background:#ef44441a;color:#ef4444;border:1px solid rgba(239,68,68,.3);padding:8px 12px;border-radius:6px;font-family:inherit;font-size:.85rem;font-weight:500;cursor:pointer;flex:1;transition:background .2s}.danger-btn:hover{background:#ef444433}.primary-btn{background:var(--accent);color:#fff;border:none;padding:10px 20px;border-radius:6px;font-family:inherit;font-weight:500;cursor:pointer;margin-top:16px;transition:background .2s,transform .1s}.primary-btn:hover{background:var(--accent-hover)}.primary-btn:active{transform:scale(.98)}.hidden-input{display:none}.viewer-area{flex:1;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center}.canvas-container{width:100%;height:100%;position:absolute;top:0;left:0;transform-origin:0 0;cursor:grab;background-color:#0f172a;background-image:linear-gradient(45deg,#1e293b 25%,transparent 25%,transparent 75%,#1e293b 75%,#1e293b),linear-gradient(45deg,#1e293b 25%,transparent 25%,transparent 75%,#1e293b 75%,#1e293b);background-size:20px 20px;background-position:0 0,10px 10px;display:flex;align-items:center;justify-content:center}.canvas-container:active{cursor:grabbing}.layer-svg{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);pointer-events:none;mix-blend-mode:screen;transition:opacity .3s ease}svg.tracespace-render{width:auto;height:80vh;max-width:90%;max-height:90%}.layer-svg[data-type=copper] svg{color:var(--layer-copper)}.layer-svg[data-type=soldermask] svg{color:var(--layer-soldermask);mix-blend-mode:multiply;opacity:.8}.layer-svg[data-type=silkscreen] svg{color:var(--layer-silkscreen)}.layer-svg[data-type=paste] svg{color:var(--layer-paste)}.layer-svg[data-type=drill] svg{color:var(--layer-drill)}.layer-svg[data-type=outline] svg{color:var(--layer-outline)}.viewer-tools{position:absolute;bottom:24px;right:24px;display:flex;gap:8px;background:var(--bg-panel);padding:8px;border-radius:8px;border:1px solid var(--border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.viewer-tools button{background:transparent;border:1px solid rgba(255,255,255,.1);color:#fff;width:36px;height:36px;border-radius:4px;font-size:1.2rem;cursor:pointer;transition:all .2s;display:grid;place-items:center}.viewer-tools button:hover{background:#ffffff1a}.drop-zone{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#0f172ae6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:100;display:flex;align-items:center;justify-content:center;opacity:1;transition:opacity .3s ease}.drop-zone.hidden{opacity:0;pointer-events:none}.drop-content{text-align:center;padding:48px;border:3px dashed var(--accent);border-radius:24px;background:#3b82f61a;animation:pulse border 2s infinite}.drop-content h2{font-size:2rem;margin:16px 0 8px}.drop-content p{color:var(--text-muted);font-size:1.1rem}.file-icon{color:var(--accent);margin:0 auto}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%) translateY(100px);background:var(--bg-panel);border:1px solid var(--border);padding:12px 24px;border-radius:8px;box-shadow:0 4px 12px #0000004d;transition:transform .3s cubic-bezier(.175,.885,.32,1.275);z-index:50}.toast.show{transform:translate(-50%) translateY(0)}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#fff3;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#ffffff4d}.loading-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#0f172acc;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:20;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.spinner{width:40px;height:40px;border:4px solid rgba(255,255,255,.1);border-left-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:16px}@keyframes spin{to{transform:rotate(360deg)}}.hidden{display:none!important}.sidebar-footer{padding:16px 24px;border-top:1px solid var(--border);background:#0000001a}.github-link{display:flex;align-items:center;justify-content:center;gap:8px;color:var(--text-muted);text-decoration:none;font-size:.85rem;font-weight:500;transition:all .2s ease;padding:8px;border-radius:6px;border:1px solid transparent}.github-link:hover{color:var(--text-main);background:#ffffff0d;border-color:var(--border)}