:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}html,body{min-height:100vh}body{margin:0;background:linear-gradient(135deg,#667eea,#764ba2)}.app{min-height:100vh;width:100%;background:linear-gradient(135deg,#667eea,#764ba2);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.app-header{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1rem;text-align:center;color:#fff;border-bottom:1px solid rgba(255,255,255,.2)}.app-header h1{margin:0;font-size:1.5rem;font-weight:700;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.main-container{display:flex;gap:2rem;padding:2rem;max-width:100%;width:100%;margin:0 auto}.control-panel{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px;padding:1.5rem;box-shadow:0 8px 32px #0000001a;border:1px solid rgba(255,255,255,.2);width:300px;height:fit-content;position:sticky;top:2rem}.help-panel{padding:.75rem 1rem;background:#0000000d;border:1px solid rgba(0,0,0,.08);border-radius:8px;color:#333;font-size:.9rem}.help-panel div{line-height:1.3}.control-section{margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid rgba(0,0,0,.1)}.control-section:last-child{border-bottom:none;margin-bottom:0}.control-section h3{margin:0 0 .75rem;color:#333;font-size:1rem;font-weight:600}.button-group{display:flex;flex-direction:row;gap:.5rem}.button-group button{flex:1;min-width:0;height:2.2rem;display:flex;align-items:center;justify-content:center}.button-group.compact{flex-direction:row;gap:.25rem;flex-wrap:wrap}.load-button,button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:.6rem .9rem;border-radius:8px;cursor:pointer;font-size:.85rem;font-weight:500;transition:all .3s ease;display:flex;align-items:center;justify-content:center;gap:.5rem}.button-group.compact button{padding:.35rem .55rem;font-size:.72rem;flex:1;min-width:0}.load-button{padding:.45rem .7rem;font-size:.78rem}.load-button:hover,button:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea66}button.active{background:linear-gradient(135deg,#4caf50,#45a049);box-shadow:0 4px 12px #4caf5066;transform:scale(1.05);border:2px solid #2e7d32}button:disabled{opacity:.5;cursor:not-allowed;transform:none!important}button:disabled:hover{transform:none!important;box-shadow:none!important}.reset-button{background:linear-gradient(135deg,#ff6b6b,#ee5a52)!important;color:#fff;border:none;padding:.5rem 1rem;border-radius:6px;cursor:pointer;font-size:.85rem;font-weight:500;transition:all .3s ease;width:100%}.reset-button:hover{background:linear-gradient(135deg,#ff5252,#e53935)!important;transform:translateY(-1px);box-shadow:0 4px 12px #ff6b6b66}.reset-button.small{padding:.4rem .8rem;font-size:.75rem;width:auto}.grayscale-button{background:linear-gradient(135deg,#6c757d,#495057);color:#fff;border:none;padding:.4rem .8rem;border-radius:6px;cursor:pointer;font-size:.75rem;font-weight:500;transition:all .3s ease;width:auto;margin-bottom:.5rem}.grayscale-button:hover{background:linear-gradient(135deg,#5a6268,#343a40);transform:translateY(-1px);box-shadow:0 4px 12px #6c757d66}.grayscale-button.active{background:linear-gradient(135deg,#28a745,#20c997);transform:scale(1.05);border:2px solid #2e7d32}.nudge-instructions{margin-top:1rem;padding:.75rem;background:#667eea1a;border-radius:8px;border:1px solid rgba(102,126,234,.2)}.nudge-instructions p{margin:.25rem 0;font-size:.85rem;color:#555}.nudge-instructions p:first-child{font-weight:600;color:#333}.radio-group{display:flex;flex-direction:column;gap:.5rem;margin-top:.5rem}.radio-group.horizontal{flex-direction:row;gap:1rem;align-items:flex-start}.radio-group.horizontal>div{display:flex;flex-direction:column;gap:.5rem}.radio-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;font-size:.85rem;color:#555;padding:.25rem 0}.radio-label input[type=radio]{margin:0;width:16px;height:16px;appearance:none;border:2px solid #ccc;border-radius:50%;background:#fff;cursor:pointer;position:relative}.radio-label input[type=radio]:checked{border-color:#667eea;background:#667eea}.radio-label input[type=radio]:checked:after{content:"";position:absolute;top:50%;left:50%;width:6px;height:6px;border-radius:50%;background:#fff;transform:translate(-50%,-50%)}.radio-label input[type=checkbox]{margin:0;width:16px;height:16px;appearance:none;border:2px solid #ccc;border-radius:3px;background:#fff;cursor:pointer;position:relative}.radio-label input[type=checkbox]:checked{border-color:#667eea;background:#667eea}.radio-label input[type=checkbox]:checked:after{content:"✓";position:absolute;top:50%;left:50%;color:#fff;font-size:12px;font-weight:700;transform:translate(-50%,-50%)}.radio-label:has(input:disabled){opacity:.5;cursor:not-allowed}.slider-group{margin-top:1rem}.slider-group label{display:block;margin-bottom:.5rem;color:#555;font-size:.9rem;font-weight:500}.slider{width:100%;height:4px;border-radius:2px;background:#ddd;outline:none;-webkit-appearance:none}.slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);cursor:pointer;box-shadow:0 2px 6px #0003}.slider::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);cursor:pointer;border:none;box-shadow:0 2px 6px #0003}.slider:focus{outline:2px solid #667eea;outline-offset:2px}.color-picker-section{margin-top:1rem;position:relative}.color-button{width:100%;height:40px;border-radius:8px;border:2px solid #ddd;cursor:pointer;font-weight:500;transition:all .3s ease}.color-button:hover{border-color:#667eea;transform:translateY(-1px)}.color-picker-popup{position:absolute;top:100%;left:0;z-index:1000;background:#fff;border-radius:8px;padding:1rem;box-shadow:0 8px 32px #0003;border:1px solid rgba(0,0,0,.1);margin-top:.5rem}.canvas-container{flex:1;background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px;padding:1.5rem;box-shadow:0 8px 32px #0000001a;border:1px solid rgba(255,255,255,.2);position:relative;overflow:hidden}.pcb-canvas{width:100%;height:auto;aspect-ratio:4 / 3;max-height:calc(100vh - 220px);border:2px solid #e0e0e0;border-radius:8px;background:#f8f9fa;display:block}.scrollbar-horizontal{position:absolute;left:1.5rem;right:1.5rem;bottom:.75rem;height:8px;overflow-x:auto;overflow-y:hidden;background:#0000000f;border-radius:8px}.scrollbar-horizontal-content{width:2000px;height:1px}.scrollbar-vertical{position:absolute;top:1.5rem;bottom:1.5rem;right:.75rem;width:16px;overflow-y:auto;overflow-x:hidden;background:#0000000f;border-radius:8px}.scrollbar-vertical-content{height:2000px;width:1px}.draw-cursor{cursor:crosshair}.erase-cursor{cursor:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><circle cx="10" cy="10" r="8" fill="white" stroke="black" stroke-width="2"/></svg>') 10 10,auto}.transform-cursor{cursor:move}.default-cursor{cursor:default}.placeholder{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#666;font-size:1.1rem}.placeholder p{margin:.5rem 0}@media(max-width:1200px){.main-container{flex-direction:column}.control-panel{width:100%;position:static}.canvas-container{min-height:500px}}@media(max-width:768px){.app-header{padding:1rem}.app-header h1{font-size:2rem}.main-container{padding:1rem;gap:1rem}.control-panel,.canvas-container{padding:1rem}.pcb-canvas{max-height:calc(100vh - 260px)}}.loading{opacity:.6;pointer-events:none}*{transition:all .3s ease}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#0000001a;border-radius:4px}::-webkit-scrollbar-thumb{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:linear-gradient(135deg,#5a6fd8,#6a4190)}