:root{--bg-primary:#0d1117;--bg-secondary:#161b22;--bg-tertiary:#21262d;--bg-card:#1c2128;--border:#30363d;--border-light:#484f58;--text-primary:#e6edf3;--text-secondary:#8b949e;--text-muted:#6e7681;--accent-blue:#58a6ff;--accent-green:#3fb950;--accent-yellow:#d29922;--accent-red:#f85149;--accent-purple:#bc8cff;--accent-orange:#f0883e;--accent-pink:#f778ba;--accent-cyan:#39d2c0;--cat-math:#bc8cff;--cat-programming:#58a6ff;--cat-systems:#f0883e;--cat-theory:#f778ba;--cat-engineering:#3fb950;--cat-ai-ml:#f85149;--cat-professional:#d29922;--sidebar-width:280px;--detail-width:420px;--topbar-height:60px;--transition:.25s ease;--radius:8px;--radius-lg:12px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto 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var(--transition);text-align:left;width:100%}.nav-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.nav-btn.active{background:var(--bg-tertiary);border-color:var(--border);color:var(--text-primary)}.nav-icon{font-size:18px;width:24px;text-align:center}.nav-label{flex:1;font-weight:500}.nav-badge{font-size:11px;background:var(--bg-primary);padding:2px 8px;border-radius:10px;color:var(--text-muted)}.sidebar-section{padding:16px 12px;border-bottom:1px solid var(--border)}.sidebar-section h3{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:10px}.view-toggle{display:flex;gap:4px;background:var(--bg-primary);border-radius:var(--radius);padding:3px}.view-btn{flex:1;padding:6px 4px;background:transparent;border:0;border-radius:6px;color:var(--text-secondary);font-size:12px;cursor:pointer;transition:all var(--transition)}.view-btn:hover{color:var(--text-primary)}.view-btn.active{background:var(--bg-tertiary);color:var(--text-primary)}.filter-group{margin-bottom:10px}.filter-group label{display:block;font-size:12px;color:var(--text-secondary);margin-bottom:4px}.filter-group select{width:100%;padding:6px 8px;background:var(--bg-primary);border:1px solid var(--border);border-radius:6px;color:var(--text-primary);font-size:12px;cursor:pointer}.filter-group select:focus{outline:0;border-color:var(--accent-blue)}.progress-ring-container{position:relative;width:100px;height:100px;margin:0 auto 12px}.progress-ring{width:100%;height:100%;transform:rotate(-90deg)}.progress-ring-bg{fill:none;stroke:var(--bg-primary);stroke-width:8}.progress-ring-fill{fill:none;stroke:var(--accent-green);stroke-width:8;stroke-linecap:round;stroke-dasharray:326.73;stroke-dashoffset:326.73;transition:stroke-dashoffset .6s ease}.progress-ring-text{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:22px;font-weight:700;color:var(--accent-green)}.progress-stats{text-align:center;display:flex;justify-content:center;gap:16px}.stat{font-size:12px;color:var(--text-secondary)}.stat span{font-weight:700;color:var(--text-primary)}.reset-btn,.export-btn{width:100%;padding:8px;border:1px solid var(--border);border-radius:var(--radius);background:transparent;color:var(--text-secondary);font-size:12px;cursor:pointer;transition:all var(--transition);margin-bottom:6px}.reset-btn:hover{background:rgba(248,81,73,0.1);border-color:var(--accent-red);color:var(--accent-red)}.export-btn:hover{background:rgba(88,166,255,0.1);border-color:var(--accent-blue);color:var(--accent-blue)}#main-content{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}#top-bar{height:var(--topbar-height);min-height:var(--topbar-height);padding:0 24px;display:flex;align-items:center;gap:16px;border-bottom:1px solid var(--border);background:var(--bg-secondary)}.breadcrumb{display:flex;gap:8px;align-items:center;white-space:nowrap}.crumb{font-size:14px;color:var(--text-secondary);font-weight:500}.crumb.active{color:var(--text-primary)}.search-container{position:relative;flex:1;max-width:360px}#search-input{width:100%;padding:7px 12px 7px 32px;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:13px}#search-input:focus{outline:0;border-color:var(--accent-blue);box-shadow:0 0 0 3px rgba(88,166,255,0.15)}
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#graph-controls button{width:36px;height:36px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}#graph-controls button:hover{background:var(--bg-tertiary);border-color:var(--accent-blue)}#graph-zoom-label{position:absolute;bottom:16px;left:16px;font-size:11px;color:var(--text-muted);background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:4px 10px;z-index:15;pointer-events:none}#graph-legend{position:absolute;top:16px;left:16px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:10px 14px;z-index:15;font-size:11px;color:var(--text-secondary);line-height:1.8}#graph-legend .gl-row{display:flex;align-items:center;gap:8px}#graph-legend .gl-line{width:24px;height:3px;border-radius:2px;flex-shrink:0}#graph-hint{position:absolute;top:16px;right:16px;font-size:11px;color:var(--text-muted);background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:6px 12px;z-index:15;pointer-events:none;max-width:220px;text-align:center;line-height:1.5}#table-view{overflow:auto;padding:16px}#course-table{width:100%;border-collapse:collapse;font-size:13px}#course-table thead{position:sticky;top:0;z-index:5}#course-table th{background:var(--bg-tertiary);padding:10px 12px;text-align:left;font-weight:600;color:var(--text-secondary);font-size:12px;text-transform:uppercase;letter-spacing:.3px;border-bottom:1px solid var(--border);white-space:nowrap}#course-table th.sortable{cursor:pointer}#course-table th.sortable:hover{color:var(--text-primary)}#course-table th.sort-asc::after{content:' ▲'}#course-table th.sort-desc::after{content:' ▼'}#course-table td{padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:middle}#course-table tr{cursor:pointer;transition:background var(--transition)}#course-table tbody tr:hover{background:var(--bg-tertiary)}#course-table .table-checkbox{width:16px;height:16px;appearance:none;-webkit-appearance:none;border:2px solid var(--border-light);border-radius:3px;cursor:pointer;position:relative}#course-table .table-checkbox:checked{background:var(--accent-green);border-color:var(--accent-green)}#course-table .table-checkbox:checked::after{content:'✓';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:white;font-size:10px;font-weight:700}.cat-badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600;white-space:nowrap}.cat-badge.math{background:rgba(188,140,255,0.15);color:var(--cat-math)}.cat-badge.programming{background:rgba(88,166,255,0.15);color:var(--cat-programming)}.cat-badge.systems{background:rgba(240,136,62,0.15);color:var(--cat-systems)}.cat-badge.theory{background:rgba(247,120,186,0.15);color:var(--cat-theory)}.cat-badge.engineering{background:rgba(63,185,80,0.15);color:var(--cat-engineering)}.cat-badge.ai-ml{background:rgba(248,81,73,0.15);color:var(--cat-ai-ml)}.cat-badge.professional{background:rgba(210,153,34,0.15);color:var(--cat-professional)}#detail-panel{position:fixed;top:0;right:0;width:var(--detail-width);height:100vh;background:var(--bg-secondary);border-left:1px solid var(--border);z-index:100;overflow-y:auto;box-shadow:-8px 0 24px rgba(0,0,0,0.3);transition:transform var(--transition)}#detail-panel.hidden{transform:translateX(100%)}.close-panel{position:sticky;top:0;float:right;margin:12px;width:32px;height:32px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:50%;color:var(--text-secondary);font-size:16px;cursor:pointer;z-index:10;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}.close-panel:hover{background:var(--accent-red);color:white;border-color:var(--accent-red)}#detail-content{padding:20px}.detail-header{margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--border)}.detail-course-number{font-size:12px;color:var(--text-muted);margin-bottom:4px}.detail-title{font-size:20px;font-weight:700;margin-bottom:8px;line-height:1.3}.detail-tags{display:flex;gap:6px;flex-wrap:wrap}.detail-section{margin-bottom:20px}.detail-section h3{font-size:13px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:8px;padding-bottom:4px;border-bottom:1px solid var(--border)}.detail-section p,.detail-section li{font-size:13px;color:var(--text-secondary);line-height:1.6}.detail-section ul{padding-left:16px}.detail-section li{margin-bottom:4px}.detail-link{display:flex;align-items:center;gap:8px;padding:8px 12px;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius);color:var(--accent-blue);text-decoration:none;font-size:13px;margin-bottom:6px;transition:all var(--transition);word-break:break-all}.detail-link:hover{border-color:var(--accent-blue);background:rgba(88,166,255,0.05)}
.detail-link-icon{font-size:16px;width:20px;text-align:center;flex-shrink:0}.prereq-chain{display:flex;flex-direction:column;gap:4px}.prereq-item{display:flex;align-items:center;gap:8px;padding:6px 10px;background:var(--bg-primary);border-radius:6px;font-size:12px;cursor:pointer;transition:all var(--transition)}.prereq-item:hover{background:var(--bg-tertiary)}.prereq-arrow{color:var(--text-muted)}.future-item{display:flex;align-items:center;gap:8px;padding:6px 10px;background:var(--bg-primary);border-radius:6px;font-size:12px;cursor:pointer;transition:all var(--transition);border-left:3px solid var(--accent-green)}.future-item:hover{background:var(--bg-tertiary)}.detail-status-toggle{display:flex;gap:4px;margin-top:10px}.status-btn{flex:1;padding:8px;border:1px solid var(--border);border-radius:var(--radius);background:transparent;color:var(--text-secondary);font-size:12px;cursor:pointer;transition:all var(--transition)}.status-btn:hover{border-color:var(--border-light)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-light)}@media(max-width:1024px){.legend{display:none}.course-grid{grid-template-columns:1fr}}@media(max-width:768px){#sidebar{position:fixed;left:-280px;height:100vh;z-index:200;transition:left var(--transition)}#sidebar.open{left:0}#detail-panel{width:100%}}