.major-selector{flex-wrap:wrap;justify-content:center;gap:12px;margin:20px 0;padding:0 20px;display:flex}.major-btn{background:var(--surface-color);border:1px solid var(--border-color);color:var(--text-color);cursor:pointer;border-radius:8px;padding:8px 15px;font-size:.8rem;transition:all .2s}.major-btn:hover:not(:disabled){border-color:var(--primary-color);transform:translateY(-2px)}.major-btn.active{background:linear-gradient(90deg, var(--primary-color) 0%, var(--primary-gradient) 100%);color:#fff;border:1px solid #fff}.major-btn:disabled{opacity:.6;cursor:not-allowed}.controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;margin:20px;display:flex}.control-btn{background:var(--surface-color);border:1px solid var(--border-color);color:var(--text-color);cursor:pointer;border-radius:8px;align-items:center;gap:8px;padding:10px 20px;transition:all .2s;display:flex}.control-btn:hover{border-color:var(--primary-color);background:var(--primary-color);color:#fff}.info-text{color:var(--text-muted);align-items:center;gap:6px;font-size:.9rem;display:flex}.semester-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;max-width:1400px;margin:0 auto;padding:20px;display:grid}.semester-box{background:var(--surface-color);border:1px solid var(--border-color);border-radius:12px;min-width:280px;min-height:200px;padding:16px}.semester-title{color:var(--text-color);border-bottom:1px solid var(--border-color);margin-bottom:16px;padding-bottom:12px;font-size:1.1rem}.course-list{flex-direction:column;gap:8px;min-height:100px;display:flex}.course-item{background:var(--tr-hover-color);cursor:move;-webkit-user-select:none;user-select:none;border:1px solid #efedf133;border-radius:8px;padding:16px;transition:all .2s}.course-item:hover{background:var(--border-color);transform:translateY(-2px)}.course-item.dragging{opacity:.5;background:#6d28d94d}.course-item.selected{background:#4f46e533;border-color:#4f46e566;box-shadow:0 0 0 2px #4f46e54d}.course-item.prerequisite{background:#f59e0b1a;border-color:#f59e0b4d}.course-item.prerequisite-missing{background:#ef44441a;border-color:#ef44444d}.course-header{justify-content:space-between;align-items:flex-start;margin-bottom:8px;display:flex}.course-code{color:var(--text-color);font-size:1rem;font-weight:600}.course-credits{color:var(--text-muted);background:#6d28d91a;border-radius:4px;padding:2px 8px;font-size:.85rem}.course-name{color:var(--text-muted);margin:8px 0;font-size:.9rem;line-height:1.4}.course-prereqs{color:#f59e0b;align-items:center;gap:4px;font-size:.85rem;display:flex}.course-prereqs i{font-size:.8rem}.legend{gap:16px;margin-top:8px;display:flex}.legend-item{color:var(--text-muted);align-items:center;gap:6px;font-size:.85rem;display:flex}.color-box{border-radius:4px;width:16px;height:16px}.color-box.prerequisite{background:#f59e0b1a;border:1px solid #f59e0b4d}.color-box.selected{background:#4f46e533;border:1px solid #4f46e566}.semester-credits{color:var(--text-muted);margin-left:8px;font-size:.9rem}@media (max-width:768px){.semester-grid{grid-template-columns:1fr;padding:10px}.controls{flex-direction:column;align-items:stretch;padding:0 20px}.info-text{text-align:center;justify-content:center}}