: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;font-size:2.5rem;margin-bottom:20px}.selectors-card,.schedule-card{border-radius:12px;padding:25px;margin-bottom:30px;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);box-shadow:0 4px 20px #6366f166;border:1px solid rgba(99,102,241,.2)}select{width:100%;padding:10px 12px;border-radius:8px;font-size:1rem;border:1px solid #555;background-color:inherit;color:inherit;appearance:none;-webkit-appearance:none;-moz-appearance:none;cursor:pointer;transition:all .3s}select:focus{outline:none;border-color:var(--primary-dark);box-shadow:0 0 0 3px #6366f133}input[type=date]{width:100%;padding:10px 0;margin-bottom:20px;border-radius:8px;border:1px solid #555;background-color:inherit;color:inherit;font-size:1rem}button{width:100%;padding:10px 12px;border-radius:8px;border:none;cursor:pointer;background:linear-gradient(90deg,#4f46e5,#6366f1);color:#fff;font-weight:600;transition:all .3s}button:disabled{opacity:.5;cursor:not-allowed}button:hover:not(:disabled){filter:brightness(1.2)}table{width:100%;border-collapse:collapse;transition:all .3s}th,td{padding:12px;border-bottom:1px solid #444;text-align:left}body.light th{background:#e0e7ff;color:#3730a3}body.dark th{background:#2a2a3a;color:#c7d2fe}body.dark td{border-color:#555}tr:hover td{background-color:#6366f11a}.theme-toggle{position:fixed;top:20px;right:20px;width:50px;height:50px;border-radius:50%;border:none;font-size:1.5rem;cursor:pointer;background:linear-gradient(135deg,#4f46e5,#6366f1);color:#fff;box-shadow:0 0 15px #6366f199;transition:all .3s;z-index:1000}.theme-toggle:hover{transform:scale(1.1);filter:brightness(1.2)}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}