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h3{margin-top:0;margin-bottom:1rem;color:#34495e;font-size:1.2rem;border-bottom:2px solid #3498db;padding-bottom:.5rem}.modal-body .form-group{margin-bottom:1rem}@media (max-width: 768px){.navbar{padding:1rem}.mobile-menu-toggle{display:block!important;position:absolute;right:1rem;top:1.25rem;background:transparent;border:none;color:#fff;font-size:1.8rem;cursor:pointer;z-index:1001;padding:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center}.sidebar-overlay{display:block;position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;z-index:998;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.navbar-menu{position:fixed;top:0;left:-100%;width:280px;height:100vh;background-color:#2c3e50;flex-direction:column;gap:0;padding:0;z-index:999;transition:left .3s ease-in-out;overflow-y:auto;box-shadow:2px 0 10px #0000004d}.navbar-menu.open{left:0}.sidebar-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid rgba(255,255,255,.1);background-color:#34495e}.sidebar-title{font-size:1.3rem;font-weight:700;color:#fff}.sidebar-close{background:transparent;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:.25rem;width:35px;height:35px;display:flex;align-items:center;justify-content:center}.sidebar-user-info{display:block;padding:1rem 1.5rem;border-bottom:1px solid rgba(255,255,255,.1);color:#ecf0f1;font-size:.95rem}.sidebar-user-info strong{display:block;font-size:1.05rem;margin-bottom:.25rem}.navbar-link{width:100%;padding:1rem 1.5rem;border-radius:0;border-bottom:1px solid rgba(255,255,255,.1);display:block;text-align:left}.navbar-link:hover{background-color:#ffffff26}.navbar-menu .btn{width:calc(100% - 3rem);margin:1rem 1.5rem;text-align:center}.main-content{padding:1rem}.card{padding:1.5rem}.metrics-grid{grid-template-columns:1fr;gap:1rem}.table-container{overflow-x:auto;-webkit-overflow-scrolling:touch}.table{min-width:600px}.form-input{font-size:16px}.btn{width:100%;margin-bottom:.5rem}.btn-small{width:auto}.drag-drop-zone{padding:2rem 1rem}.upload-icon{font-size:2rem}.countdown-grid{grid-template-columns:repeat(2,1fr);gap:1rem}.countdown-value{font-size:1.5rem}.quick-links-grid,.download-buttons-grid{grid-template-columns:1fr}.leaderboard-header{flex-direction:column;align-items:flex-start}.leaderboard-tabs{width:100%}.leaderboard-tabs .btn{flex:1;min-width:120px}.chat-container{height:calc(100vh - 120px)}.chat-messages{padding:1rem}.chat-message-bubble{max-width:85%}.chat-input-container{padding:1rem}.chat-input-form{flex-direction:column;gap:.5rem}.chat-input-form input,.chat-input-form button{width:100%}}@media (max-width: 480px){.navbar-brand,.card-title{font-size:1.2rem}.metric-value{font-size:1.5rem}.main-content{padding:.5rem}.card{padding:1rem;margin-bottom:1rem}.login-card{padding:1.5rem;margin:1rem}}@media (max-width: 768px) and (orientation: landscape){.navbar-menu.open{max-height:300px;overflow-y:auto}}@media (hover: none) and (pointer: coarse){.btn,.navbar-link,.tab{min-height:44px}}.footer{background:linear-gradient(135deg,#1b1b1b,#3a3a3a);color:#fff;padding:2rem 0 1rem;margin-top:auto}.footer-content{max-width:1200px;margin:0 auto;padding:0 2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;margin-bottom:2rem}.footer-section h3{font-size:1.5rem;margin-bottom:.5rem;color:#3498db}.footer-section h4{font-size:1.1rem;margin-bottom:1rem;color:#3498db;border-bottom:2px solid #3498db;padding-bottom:.5rem}.footer-section p{color:#bdc3c7;margin:.5rem 0;line-height:1.6}.footer-section ul{list-style:none;padding:0;margin:0}.footer-section ul li{margin-bottom:.5rem}.footer-section ul li a{color:#bdc3c7;text-decoration:none;transition:color .3s ease}.footer-section ul li a:hover{color:#3498db}.footer-bottom{border-top:1px solid #555;padding:1rem 2rem;text-align:center}.footer-bottom p{color:#bdc3c7;margin:0;font-size:.9rem}@media (max-width: 768px){.footer-content{grid-template-columns:1fr;gap:1.5rem;padding:0 1rem}.footer{padding:1.5rem 0 1rem}}