:root{--color-major:#e74c3c;--color-category:#3498db;--color-course:#2ecc71;--color-type:#f39c12;--color-ability:#9b59b6;--color-point:#1abc9c;--primary-color:#3498db;--primary-hover:#2980b9;--success-color:#27ae60;--success-hover:#219a52;--secondary-color:#95a5a6;--secondary-hover:#7f8c8d;--danger-color:#e74c3c;--bg-primary:#f8f9fa;--bg-secondary:#fff;--bg-dark:#2c3e50;--text-primary:#2c3e50;--text-secondary:#7f8c8d;--text-light:#fff;--border-color:#e1e8ed;--border-radius:8px;--border-radius-lg:12px;--shadow-sm:0 2px 4px #00000014;--shadow-md:0 4px 12px #0000001f;--shadow-lg:0 8px 24px #00000029;--transition-fast:.15s ease;--transition-normal:.3s ease;--transition-slow:.5s ease;--toolbar-height:60px;--panel-width:320px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;color:var(--text-primary);background:var(--bg-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;line-height:1.5;overflow:hidden}.toolbar{height:var(--toolbar-height);-webkit-backdrop-filter:blur(10px);z-index:100;background:#fffffff2;border-bottom:1px solid #fff3;justify-content:space-between;align-items:center;padding:0 20px;display:flex;box-shadow:0 4px 20px #0000001a}.toolbar-left{align-items:center;display:flex}.logo{color:var(--text-primary);background:linear-gradient(135deg,var(--primary-color),var(--color-course));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:18px;font-weight:600}.toolbar-center{align-items:center;gap:16px;display:flex}.toolbar-right{align-items:center;gap:12px;display:flex}.ops-menu{position:relative}.ops-panel{border:1px solid var(--border-color);border-radius:var(--border-radius);min-width:180px;box-shadow:var(--shadow-md);z-index:120;background:#fffffffa;flex-direction:column;gap:6px;padding:8px;display:none;position:absolute;top:calc(100% + 8px);right:0}.ops-panel.active{display:flex}.ops-panel .btn{justify-content:flex-start;width:100%}.course-selector,.level-selector{align-items:center;gap:8px;display:flex}.course-selector label{color:var(--text-secondary);font-weight:500}.course-selector select,.level-selector select{border:1px solid var(--border-color);border-radius:var(--border-radius);background:var(--bg-secondary)url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237f8c8d' d='M6 8L1 3h10z'/%3E%3C/svg%3E") no-repeat right 12px center;appearance:none;cursor:pointer;transition:var(--transition-fast);padding:8px 32px 8px 12px;font-size:14px}.course-selector select{min-width:200px}.level-selector select{min-width:80px}.course-selector select:hover,.level-selector select:hover{border-color:var(--primary-color)}.course-selector select:focus,.level-selector select:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #3498db26}.level-selector select:disabled{opacity:.5;cursor:not-allowed;background-color:#f5f5f5}.btn{border-radius:var(--border-radius);cursor:pointer;transition:var(--transition-fast);white-space:nowrap;border:none;justify-content:center;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:500;display:inline-flex}.btn .icon{font-size:16px}.btn-primary{background:var(--primary-color);color:var(--text-light)}.btn-primary:hover{background:var(--primary-hover);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.btn-success{background:var(--success-color);color:var(--text-light)}.btn-success:hover{background:var(--success-hover);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.btn-secondary{background:var(--secondary-color);color:var(--text-light)}.btn-secondary:hover{background:var(--secondary-hover)}.btn-sm{padding:6px 12px;font-size:12px}.btn-block{width:100%}.btn-group{flex-direction:column;gap:8px;display:flex}.btn-close{width:28px;height:28px;color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast);background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;font-size:20px;display:flex}.btn-close:hover{background:var(--bg-primary);color:var(--text-primary)}.main-container{height:calc(100vh - var(--toolbar-height));display:flex;position:relative}.graph-container{background:#fff;flex:1;transition:background .5s;position:relative;overflow:hidden}.graph-chart{width:100%;height:100%}.loading-overlay{z-index:50;background:#fffffff2;flex-direction:column;justify-content:center;align-items:center;transition:opacity .5s,visibility .5s;display:flex;position:absolute;inset:0}.loading-overlay.hidden{opacity:0;visibility:hidden;pointer-events:none}.loading-content{flex-direction:column;align-items:center;display:flex}.loading-spinner{width:60px;height:60px;position:relative}.loading-spinner:before,.loading-spinner:after{content:"";border-radius:50%;position:absolute}.loading-spinner:before{border:4px solid #e1e8ed;border-top-color:var(--primary-color);border-right-color:var(--primary-color);width:100%;height:100%;animation:1.2s linear infinite spin}.loading-spinner:after{border:4px solid #e1e8ed;border-bottom-color:var(--color-course);border-left-color:var(--color-course);width:36px;height:36px;animation:.8s linear infinite reverse spin;top:12px;left:12px}.loading-nodes{gap:12px;margin-top:24px;display:flex}.loading-node{border-radius:50%;width:14px;height:14px;animation:1.4s ease-in-out infinite nodeFloat}.loading-node:first-child{background:var(--color-major);animation-delay:0s}.loading-node:nth-child(2){background:var(--color-category);animation-delay:.2s}.loading-node:nth-child(3){background:var(--color-course);animation-delay:.4s}.loading-node:nth-child(4){background:var(--color-type);animation-delay:.6s}.loading-node:nth-child(5){background:var(--color-point);animation-delay:.8s}@keyframes spin{to{transform:rotate(360deg)}}@keyframes nodeFloat{0%,to{opacity:1;transform:translateY(0)scale(1)}50%{opacity:.7;transform:translateY(-10px)scale(1.15)}}.loading-overlay p{color:var(--text-primary);margin-top:20px;font-size:15px;font-weight:500}.loading-tip{color:var(--text-secondary);margin-top:6px;font-size:12px}.config-panel{width:var(--panel-width);background:var(--bg-secondary);border-left:1px solid var(--border-color);height:100%;box-shadow:var(--shadow-lg);transition:transform var(--transition-normal);z-index:90;flex-direction:column;display:flex;position:absolute;top:0;right:0;transform:translate(100%)}.config-panel.active{transform:translate(0)}.panel-header{border-bottom:1px solid var(--border-color);background:var(--bg-primary);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.panel-header h3{font-size:16px;font-weight:600}.panel-content{flex:1;padding:16px 20px;overflow-y:auto}.config-section{border-bottom:1px solid var(--border-color);margin-bottom:24px;padding-bottom:20px}.config-section:last-child{border-bottom:none;margin-bottom:0}.config-section h4{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px;font-size:13px;font-weight:600}.config-item{margin-bottom:12px}.config-item:last-child{margin-bottom:0}.config-item label{color:var(--text-primary);cursor:pointer;align-items:center;gap:8px;font-size:13px;display:flex}.input-text{border:1px solid var(--border-color);border-radius:var(--border-radius);width:100%;transition:var(--transition-fast);padding:8px 12px;font-size:13px}.input-text:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #3498db26}.color-grid{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.color-item{justify-content:space-between;align-items:center;display:flex}.color-item label{flex:1}.color-item input[type=color]{border:2px solid var(--border-color);cursor:pointer;border-radius:4px;width:36px;height:28px;padding:0;overflow:hidden}.color-item input[type=color]::-webkit-color-swatch-wrapper{padding:2px}.color-item input[type=color]::-webkit-color-swatch{border:none;border-radius:2px}.slider-item label{justify-content:space-between;margin-bottom:6px;display:flex}.slider-item label span{color:var(--primary-color);font-weight:600}.slider-item input[type=range]{background:var(--border-color);appearance:none;cursor:pointer;border-radius:3px;width:100%;height:6px}.slider-item input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--primary-color);cursor:pointer;width:16px;height:16px;box-shadow:var(--shadow-sm);transition:var(--transition-fast);border-radius:50%}.slider-item input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.1)}input[type=checkbox],input[type=radio]{width:16px;height:16px;accent-color:var(--primary-color);cursor:pointer}.modal{z-index:1000;opacity:0;visibility:hidden;transition:var(--transition-fast);background:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal.active{opacity:1;visibility:visible}.modal-content{background:var(--bg-secondary);border-radius:var(--border-radius-lg);width:90%;max-width:500px;max-height:80vh;box-shadow:var(--shadow-lg);transition:transform var(--transition-fast);overflow:hidden;transform:scale(.9)}.modal.active .modal-content{transform:scale(1)}.modal-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.modal-header h3{font-size:16px;font-weight:600}.modal-body{max-height:calc(80vh - 60px);padding:20px;overflow-y:auto}.modal-body .detail-item{border-bottom:1px dashed var(--border-color);margin-bottom:12px;padding-bottom:12px;display:flex}.modal-body .detail-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.modal-body .detail-label{width:80px;color:var(--text-secondary);font-size:13px}.modal-body .detail-value{flex:1;font-weight:500}@media (max-width:768px){.toolbar{flex-wrap:wrap;gap:12px;height:auto;padding:12px 16px}.toolbar-left,.toolbar-center,.toolbar-right{justify-content:center;width:100%}.logo{font-size:16px}.course-selector select{min-width:150px}.config-panel{width:100%}.legend-panel{padding:12px;bottom:10px;left:10px}.stats-panel{padding:8px 12px;bottom:10px;right:10px}}[data-tooltip]{position:relative}[data-tooltip]:after{content:attr(data-tooltip);background:var(--bg-dark);color:var(--text-light);white-space:nowrap;opacity:0;visibility:hidden;transition:var(--transition-fast);pointer-events:none;border-radius:4px;padding:6px 10px;font-size:12px;position:absolute;bottom:100%;left:50%;transform:translate(-50%)}[data-tooltip]:hover:after{opacity:1;visibility:visible}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--secondary-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--secondary-hover)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn var(--transition-normal)}.slide-in{animation:slideIn var(--transition-normal)}.theme-selector{align-items:center;gap:8px;display:flex}.theme-selector label{color:var(--text-secondary);font-size:13px;font-weight:500}.theme-selector select{border:1px solid var(--border-color);border-radius:var(--border-radius);background:var(--bg-secondary)url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237f8c8d' d='M6 8L1 3h10z'/%3E%3C/svg%3E") no-repeat right 8px center;appearance:none;cursor:pointer;transition:var(--transition-fast);min-width:120px;padding:6px 28px 6px 10px;font-size:13px}.theme-selector select:hover{border-color:var(--primary-color)}.theme-selector select:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #3498db26}.legend-panel{-webkit-backdrop-filter:blur(10px);border-radius:var(--border-radius-lg);z-index:10;background:#fffffff2;border:1px solid #ffffff4d;padding:16px 20px;position:absolute;bottom:20px;left:20px;box-shadow:0 8px 32px #00000026}.legend-panel h4{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px;font-size:13px;font-weight:600}.legend-items{flex-direction:column;gap:8px;display:flex}.legend-item{align-items:center;gap:10px;font-size:13px;font-weight:500;display:flex}.legend-color{border-radius:50%;width:16px;height:16px;box-shadow:0 2px 8px #0003,inset 0 1px 2px #ffffff80}.stats-panel{-webkit-backdrop-filter:blur(10px);border-radius:var(--border-radius);color:var(--text-primary);z-index:10;background:#fffffff2;border:1px solid #ffffff4d;gap:20px;padding:14px 24px;font-size:14px;font-weight:500;display:flex;position:absolute;bottom:20px;right:20px;box-shadow:0 8px 32px #00000026}.stats-panel .btn{gap:4px;padding:6px 10px;font-size:12px}.stats-panel .btn .icon{font-size:14px}.stats-panel span{align-items:center;gap:6px;display:flex}.stats-panel span:before{content:"";background:var(--primary-color);border-radius:50%;width:8px;height:8px}.stats-panel span:last-child:before{background:var(--success-color)}.btn{position:relative;overflow:hidden}.btn:after{content:"";background:#fff3;border-radius:50%;width:0;height:0;transition:width .6s,height .6s;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.btn:active:after{width:300px;height:300px}.visually-hidden{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.btn-primary{background:linear-gradient(135deg,var(--primary-color)0%,#2980b9 100%)}.btn-success{background:linear-gradient(135deg,var(--success-color)0%,#1e8449 100%)}