*{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%;width:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#f8fafc;color:#1f2937}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f5f9}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}::selection{background:#3b82f6;color:#fff}.header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:linear-gradient(135deg,#1e3a5f,#2d5a87);color:#fff;box-shadow:0 2px 8px #00000026}.header-left{flex:1}.back-link{color:#93c5fd;text-decoration:none;font-size:14px;transition:color .2s}.back-link:hover{color:#bfdbfe}.header-center{flex:2;text-align:center}.title-link{text-decoration:none;color:inherit}.title{margin:0;font-size:20px;font-weight:600;color:#fff;transition:color .2s}.title-link:hover .title{color:#93c5fd}.header-right{flex:1;display:flex;align-items:center;justify-content:flex-end;gap:12px}.thoughts-btn{padding:6px 12px;background:#ffffff26;border:1px solid rgba(255,255,255,.3);border-radius:6px;color:#fff;font-size:13px;cursor:pointer;transition:all .2s}.thoughts-btn:hover{background:#ffffff40}.github-link{display:flex;align-items:center;gap:6px;color:#fff;text-decoration:none;padding:6px 10px;background:#ffffff1a;border-radius:6px;transition:background .2s}.github-link:hover{background:#fff3}.github-icon{width:20px;height:20px}.star-count{font-size:13px;font-weight:500}.modal-overlay{position:fixed;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:#fff;border-radius:12px;max-width:600px;max-height:80vh;overflow-y:auto;position:relative;box-shadow:0 20px 60px #0000004d}.modal-close{position:absolute;top:12px;right:12px;width:32px;height:32px;border:none;background:#f3f4f6;border-radius:50%;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.modal-close:hover{background:#e5e7eb}.thoughts-content{padding:24px;color:#1f2937;line-height:1.7}.thoughts-content h2{color:#1e3a5f;margin-top:0;margin-bottom:16px;font-size:22px}.thoughts-content h3{color:#2d5a87;margin-top:20px;margin-bottom:12px;font-size:18px}.thoughts-content h4{color:#3b82f6;margin-top:16px;margin-bottom:8px;font-size:15px}.thoughts-content p{margin:8px 0}.thoughts-content ul{margin:8px 0;padding-left:20px}.thoughts-content li{margin:4px 0}.thoughts-content strong{color:#1e3a5f}.data-input-container{padding:10px 16px;background:#f8fafc;border-bottom:1px solid #e2e8f0}.input-row{display:flex;align-items:center;gap:10px}.input-label{font-size:14px;font-weight:500;color:#475569;white-space:nowrap}.input-field{flex:1;padding:8px 12px;border:1px solid #cbd5e1;border-radius:6px;font-size:14px;font-family:Monaco,Menlo,monospace;transition:border-color .2s,box-shadow .2s}.input-field:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a}.input-field.input-error{border-color:#ef4444}.submit-btn{padding:8px 16px;background:#3b82f6;color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:background .2s}.submit-btn:hover{background:#2563eb}.random-btn{padding:8px 12px;background:#10b981;color:#fff;border:none;border-radius:6px;font-size:14px;cursor:pointer;transition:background .2s}.random-btn:hover{background:#059669}.error-message{margin-top:6px;padding:6px 10px;background:#fef2f2;color:#dc2626;font-size:13px;border-radius:4px}.examples-row{display:flex;align-items:center;gap:8px;margin-top:8px}.examples-label{font-size:13px;color:#64748b}.example-btn{padding:4px 10px;background:#fff;border:1px solid #e2e8f0;border-radius:4px;font-size:12px;color:#475569;cursor:pointer;transition:all .2s}.example-btn:hover{background:#f1f5f9;border-color:#cbd5e1}.example-btn.active{background:#3b82f6;border-color:#3b82f6;color:#fff}.code-panel{display:flex;flex-direction:column;background:#1e1e1e;border-radius:8px;overflow:hidden;height:100%}.code-header{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:#2d2d2d;border-bottom:1px solid #3d3d3d}.code-title{font-size:13px;font-weight:500;color:#9ca3af}.language-tabs{display:flex;gap:4px}.language-tab{padding:4px 10px;background:transparent;border:1px solid #4b5563;border-radius:4px;color:#9ca3af;font-size:12px;cursor:pointer;transition:all .2s}.language-tab:hover{background:#374151;color:#fff}.language-tab.active{background:#3b82f6;border-color:#3b82f6;color:#fff}.code-content{flex:1;overflow:auto;font-family:Monaco,Menlo,Consolas,monospace;font-size:12px;line-height:1.5}.code-line{display:flex;align-items:center;padding:0 8px;min-height:22px;transition:background .2s}.code-line.highlighted{background:#3b82f64d;border-left:3px solid #3b82f6}.line-number{width:32px;text-align:right;padding-right:12px;color:#6b7280;-webkit-user-select:none;user-select:none;flex-shrink:0}.line-content{flex:1;white-space:pre}.line-variables{display:flex;gap:6px;margin-left:16px;flex-shrink:0}.variable-badge{padding:2px 6px;background:#10b981;color:#fff;font-size:11px;border-radius:3px;font-family:Monaco,Menlo,monospace}.canvas-container{display:flex;flex-direction:column;height:100%;background:#fafbfc;border-radius:8px;overflow:hidden}.canvas-toolbar{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:#fff;border-bottom:1px solid #e2e8f0}.toolbar-btn{padding:4px 10px;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:4px;font-size:12px;color:#475569;cursor:pointer;transition:all .2s}.toolbar-btn:hover{background:#e2e8f0}.zoom-info{font-size:12px;color:#64748b}.canvas-description{padding:10px 16px;background:linear-gradient(135deg,#1e3a5f,#2d5a87);color:#fff;font-size:14px;font-weight:500;min-height:40px;display:flex;align-items:center}.canvas-svg{flex:1;width:100%;cursor:grab;background:linear-gradient(90deg,#f1f5f9 1px,transparent 1px),linear-gradient(#f1f5f9 1px,transparent 1px);background-size:20px 20px}.canvas-svg:active{cursor:grabbing}.playback-controls{background:#fff;border-top:1px solid #e2e8f0;padding:12px 16px}.controls-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.control-buttons{display:flex;gap:8px}.control-btn{display:flex;flex-direction:column;align-items:center;padding:8px 14px;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:8px;cursor:pointer;transition:all .2s;min-width:60px}.control-btn:hover{background:#e2e8f0}.control-btn.play-btn{background:#3b82f6;border-color:#3b82f6;color:#fff}.control-btn.play-btn:hover{background:#2563eb}.control-btn.reset-btn{background:#f59e0b;border-color:#f59e0b;color:#fff}.control-btn.reset-btn:hover{background:#d97706}.btn-icon{font-size:18px;line-height:1}.btn-shortcut{font-size:10px;color:inherit;opacity:.7;margin-top:2px}.step-info{font-size:14px;color:#475569;font-weight:500}.speed-control{display:flex;align-items:center;gap:8px}.speed-label{font-size:13px;color:#64748b}.speed-buttons{display:flex;gap:4px}.speed-btn{padding:4px 8px;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:4px;font-size:12px;color:#475569;cursor:pointer;transition:all .2s}.speed-btn:hover{background:#e2e8f0}.speed-btn.active{background:#10b981;border-color:#10b981;color:#fff}.progress-bar{position:relative;height:24px;cursor:pointer;padding:8px 0}.progress-track{position:relative;height:8px;background:#e2e8f0;border-radius:4px;overflow:visible}.progress-fill{position:absolute;top:0;left:0;height:100%;background:linear-gradient(90deg,#10b981,#3b82f6);border-radius:4px;transition:width .1s}.progress-thumb{position:absolute;top:50%;width:16px;height:16px;background:#fff;border:3px solid #3b82f6;border-radius:50%;transform:translate(-50%,-50%);box-shadow:0 2px 4px #0000001a;transition:left .1s}.progress-markers{position:absolute;top:0;left:0;right:0;height:100%;pointer-events:none}.progress-marker{position:absolute;top:50%;width:4px;height:4px;background:#cbd5e1;border-radius:50%;transform:translate(-50%,-50%)}.progress-marker.passed{background:#10b981}.wechat-float{position:fixed;bottom:24px;right:24px;z-index:100}.float-button{display:flex;flex-direction:column;align-items:center;justify-content:center;width:60px;height:60px;background:linear-gradient(135deg,#07c160,#06ae56);border-radius:50%;box-shadow:0 4px 12px #07c16066;cursor:pointer;transition:transform .2s,box-shadow .2s}.float-button:hover{transform:scale(1.1);box-shadow:0 6px 20px #07c16080}.wechat-icon{width:24px;height:24px;color:#fff}.float-text{font-size:10px;color:#fff;margin-top:2px;font-weight:500}.qr-popup{position:absolute;bottom:70px;right:0;background:#fff;border-radius:12px;box-shadow:0 8px 30px #0003;padding:16px;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.qr-content{text-align:center}.qr-image{width:180px;height:auto;border-radius:8px}.qr-tip{margin:12px 0 0;font-size:13px;color:#475569;line-height:1.5}.qr-popup:after{content:"";position:absolute;bottom:-8px;right:24px;width:16px;height:16px;background:#fff;transform:rotate(45deg);box-shadow:4px 4px 8px #0000001a}.app{display:flex;flex-direction:column;height:100vh;overflow:hidden;background:#f8fafc}.main-content{flex:1;display:flex;gap:12px;padding:12px;overflow:hidden}.code-section{width:420px;flex-shrink:0;display:flex;flex-direction:column}.canvas-section{flex:1;display:flex;flex-direction:column;min-width:0}
