.prerequisite-container{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:80vh;padding:20px;border-radius:15px;margin:20px 0}.prerequisite-content{max-width:1200px;margin:0 auto;background:#fff;border-radius:15px;padding:30px;box-shadow:0 20px 40px rgba(0,0,0,.1)}.major-selector{margin-bottom:30px;text-align:center}.major-selector select{padding:12px 20px;font-size:16px;border:2px solid #e0e0e0;border-radius:8px;background:#fff;cursor:pointer;min-width:300px}.major-selector select:focus{outline:none;border-color:#667eea}.semesters-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:30px}.semester-card{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:15px;padding:20px;color:#fff;position:relative;overflow:hidden}.semester-card::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(45deg,rgba(255,255,255,.1),rgba(255,255,255,.05));pointer-events:none}.semester-title{font-size:1.5rem;font-weight:700;margin-bottom:15px;text-align:center;position:relative;z-index:1}.modules-list{position:relative;z-index:1}.module{background:rgba(255,255,255,.2);margin:8px 0;padding:10px 15px;border-radius:8px;font-size:.9rem;transition:all .3s ease;cursor:pointer;border:2px solid transparent}.module:hover{background:rgba(255,255,255,.3);transform:translateY(-2px)}.module.has-prerequisite{border-color:#ffeb3b;background:rgba(255,235,59,.2)}.module.selected{border-color:#ff5722;background:rgba(255,87,34,.3);box-shadow:0 4px 8px rgba(255,87,34,.3)}.arrows{display:flex;align-items:center;justify-content:center;margin:20px 0}.arrow{width:0;height:0;border-left:20px solid #667eea;border-top:15px solid transparent;border-bottom:15px solid transparent;margin:0 10px}@media (max-width:768px){.arrows{display:none}}.connections-panel{background:#f8f9fa;border-radius:10px;padding:20px;margin-top:20px}.connection-item{display:flex;align-items:center;margin:10px 0;padding:15px;background:#fff;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,.1);flex-wrap:wrap;gap:10px}.prerequisite{background:#e3f2fd;padding:8px 12px;border-radius:5px;font-weight:700;color:#1976d2;display:flex;align-items:center;gap:8px}.prerequisite-semester{background:#fff3e0;color:#f57c00;padding:4px 8px;border-radius:12px;font-size:.8rem;font-weight:700;white-space:nowrap}.arrow-icon{margin:0 15px;color:#666;font-size:1.2rem}.target-module{background:#f3e5f5;padding:8px 12px;border-radius:5px;font-weight:700;color:#7b1fa2;display:flex;align-items:center;gap:8px}.target-semester{background:#e8f5e8;color:#388e3c;padding:4px 8px;border-radius:12px;font-size:.8rem;font-weight:700;white-space:nowrap}.legend{display:flex;justify-content:center;gap:30px;margin-top:20px;font-size:.9rem;flex-wrap:wrap}.legend-item{display:flex;align-items:center;gap:8px}.legend-color{width:20px;height:15px;border-radius:3px}.legend-prerequisite{background:rgba(255,235,59,.5);border:2px solid #ffeb3b}.legend-selected{background:rgba(255,87,34,.3);border:2px solid #ff5722}@media (max-width:768px){.prerequisite-container{padding:10px}.prerequisite-content{padding:20px 15px}.major-selector select{min-width:250px;font-size:14px;padding:10px 15px}.semesters-grid{grid-template-columns:1fr;gap:15px}.semester-card{padding:15px}.semester-title{font-size:1.3rem}.module{font-size:.85rem;padding:8px 12px}.connections-panel{padding:15px}.connection-item{padding:12px;flex-direction:column;align-items:center;text-align:center}.prerequisite,.target-module{width:100%;justify-content:center;flex-wrap:wrap}.arrow-icon{margin:10px 0;transform:rotate(90deg);font-size:1.5rem}.prerequisite-semester,.target-semester{margin-top:5px;display:inline-block}.legend{gap:20px;justify-content:center}.legend-item{font-size:.85rem}}@media (max-width:480px){.prerequisite-container{padding:5px}.prerequisite-content{padding:15px 10px}.major-selector select{min-width:200px;font-size:13px}.semester-card{padding:12px}.semester-title{font-size:1.2rem}.module{font-size:.8rem;padding:6px 10px}.connections-panel{padding:12px}.connection-item{padding:10px}.prerequisite,.target-module{font-size:.9rem}.prerequisite-semester,.target-semester{font-size:.75rem;padding:3px 6px;margin-top:3px;display:block;width:100%;text-align:center}}