:root{--bg-light:#f5f6fa;--text-light:#1f2937;--card-light:#fff;--primary-light:#4f46e5;--bg-dark:#12121e;--text-dark:#f3f4f6;--card-dark:#1e1e2e;--primary-dark:#6366f1}body,html{margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;transition:background .3s,color .3s}body.light{background-color:var(--bg-light);color:var(--text-light)}body.dark{background-color:var(--bg-dark);color:var(--text-dark)}.container{max-width:800px;margin:60px auto 40px;padding:0 20px}h1{text-align:center;margin-bottom:20px;font-size:2.5rem}.selectors-card,.schedule-card{border-radius:12px;margin-bottom:30px;padding:25px;transition:background .3s,color .3s,box-shadow .3s}body.light .selectors-card,body.light .schedule-card{background-color:var(--card-light);box-shadow:0 4px 15px #00000014}body.dark .selectors-card,body.dark .schedule-card{background-color:var(--card-dark);border:1px solid #6366f133;box-shadow:0 4px 20px #6366f166}.form-group{margin-bottom:20px}.form-group label{margin-bottom:8px;font-weight:500;display:block}select{background-color:inherit;width:100%;color:inherit;appearance:none;cursor:pointer;border:1px solid #555;border-radius:8px;padding:10px 12px;font-size:1rem;transition:all .3s}select:focus{border-color:var(--primary-dark);outline:none;box-shadow:0 0 0 3px #6366f133}input[type=date]{background-color:inherit;width:100%;color:inherit;box-sizing:border-box;border:1px solid #555;border-radius:8px;padding:10px 12px;font-size:1rem}button{cursor:pointer;color:#fff;background:linear-gradient(90deg,#4f46e5,#6366f1);border:none;border-radius:8px;width:100%;padding:10px 12px;font-weight:600;transition:all .3s}button:disabled{opacity:.5;cursor:not-allowed}button:hover:not(:disabled){filter:brightness(1.2)}.table-desktop{overflow-x:auto}table{border-collapse:collapse;width:100%;transition:all .3s}th,td{text-align:left;border-bottom:1px solid #444;padding:12px}body.light th{color:#3730a3;background:#e0e7ff}body.dark th{color:#c7d2fe;background:#2a2a3a}body.dark td{border-color:#555}tr:hover td{background-color:#6366f11a}.schedule-mobile{display:none}.lesson-card{border:1px solid;border-radius:10px;margin-bottom:12px;padding:16px;transition:all .3s}body.light .lesson-card{background:#f8fafc;border-color:#e2e8f0}body.dark .lesson-card{background:#252538;border-color:#6366f14d}.lesson-header{border-bottom:1px solid;justify-content:space-between;align-items:center;margin-bottom:12px;padding-bottom:8px;display:flex}body.light .lesson-header{border-color:#e2e8f0}body.dark .lesson-header{border-color:#6366f133}.lesson-time{color:var(--primary-dark);font-size:1.1rem;font-weight:600}.lesson-order{color:#fff;background:linear-gradient(90deg,#4f46e5,#6366f1);border-radius:20px;padding:4px 10px;font-size:.85rem;font-weight:600}.lesson-subject{margin-bottom:12px;font-size:1.2rem;font-weight:600;line-height:1.4}.lesson-details{flex-direction:column;gap:8px;display:flex}.detail-item{opacity:.9;align-items:center;gap:8px;font-size:.95rem;display:flex}.detail-icon{font-size:1.1rem}@media (width<=640px){.container{margin:40px auto 20px;padding:0 15px}h1{font-size:1.8rem}.selectors-card,.schedule-card{padding:20px}.schedule-card h2{font-size:1.2rem}.table-desktop{display:none}.schedule-mobile{display:block}}.empty-schedule{text-align:center;opacity:.7;border-radius:12px;margin-bottom:30px;padding:40px;font-size:1.2rem}body.light .empty-schedule{background:var(--card-light);box-shadow:0 4px 15px #00000014}body.dark .empty-schedule{background:var(--card-dark);border:1px solid #6366f133;box-shadow:0 4px 20px #6366f166}.theme-toggle{cursor:pointer;color:#fff;z-index:1000;background:linear-gradient(135deg,#4f46e5,#6366f1);border:none;border-radius:50%;width:50px;height:50px;font-size:1.5rem;transition:all .3s;position:fixed;top:20px;right:20px;box-shadow:0 0 15px #6366f199}.theme-toggle:hover{filter:brightness(1.2);transform:scale(1.1)}footer{text-align:center;margin-top:40px;font-size:.9rem}footer a{color:var(--primary-dark);text-decoration:none}footer a:hover{text-decoration:underline}