:root{--primary-color: #155986;--secondary-color: #3498db;--accent-color: #e74c3c;--bg-light: #f8f9fa;--github-color: #24292f;--text-color: #2c3e50;--border-color: #e0e0e0}body{font-family:Roboto,sans-serif;margin:0;padding:0;background-color:var(--bg-light);color:var(--text-color)}table{margin:auto}.header{background-color:#fff;box-shadow:0 2px 10px #0000001a;position:sticky;top:0;z-index:1000}.navbar{max-width:1200px;margin:0 auto;padding:.8rem 1.5rem;display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;text-decoration:none;color:var(--primary-color);font-weight:700;font-size:1.5rem}.logo img{height:40px;margin-right:10px}.nav-links{display:flex;gap:1.5rem;margin:0;padding:0;list-style:none}.nav-links a{color:var(--text-color);text-decoration:none;font-weight:500;padding:.5rem 0;position:relative;transition:color .3s ease}.nav-links a:hover,.nav-links a.active{color:var(--secondary-color)}.nav-links a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background-color:var(--secondary-color);transition:width .3s ease}.nav-links a:hover:after,.nav-links a.active:after{width:100%}.github-star-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;margin-right:.5rem;background-color:var(--github-color);color:#fff!important;border-radius:6px;font-weight:500;text-decoration:none;transition:all .2s ease;border:1px solid rgba(240,246,252,.1);font-size:.9rem}.github-star-btn:hover{background-color:#2d333b;transform:translateY(-1px);box-shadow:0 4px 12px #0000001a;color:#fff!important}.github-star-btn i{font-size:1.1em}.user-menu{position:relative;display:flex;align-items:center;gap:1rem}.user-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover;cursor:pointer;transition:transform .2s ease}.user-avatar:hover{transform:scale(1.05)}.dropdown-menu{position:absolute;top:100%;right:0;background:#fff;border-radius:8px;box-shadow:0 2px 10px #0000001a;min-width:200px;padding:.5rem 0;margin-top:.5rem;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .2s ease;z-index:1000}.dropdown-menu.show{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-item{display:flex;align-items:center;padding:.5rem 1rem;color:var(--text-color);text-decoration:none;transition:background-color .2s ease}.dropdown-item i{width:20px;margin-right:.75rem;text-align:center;color:var(--secondary-color)}.dropdown-item:hover{background-color:#f8f9fa}.dropdown-divider{height:1px;background-color:#e9ecef;margin:.5rem 0}.login-btn{background-color:var(--secondary-color);color:#fff!important;padding:.5rem 1rem!important;border-radius:4px;transition:background-color .3s ease;text-decoration:none}.login-btn:hover{background-color:#2980b9;color:#fff!important}.main-container{max-width:1200px;margin:2rem auto;padding:0 1.5rem;min-height:calc(100vh - 200px)}.footer{background-color:var(--primary-color);color:#fff;padding:2rem 0;margin-top:3rem}.footer-content{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:2rem}.footer-section h3{margin-top:0;margin-bottom:1rem;font-size:1.2rem}.footer-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:.5rem}.footer-links a{color:#bdc3c7;text-decoration:none;transition:color .3s ease}.footer-links a:hover{color:#fff}.contest-banner{background-color:#f8d7da;color:#721c24;padding:.75rem 1.5rem;text-align:center;font-weight:500;margin-bottom:1.5rem;border-radius:4px}@media (max-width: 768px){.navbar{flex-direction:column;gap:1rem;padding:1rem}.nav-links{flex-wrap:wrap;justify-content:center;gap:1rem}.user-menu{margin-top:.5rem}}