body{font-family:'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', sans-serif;background:linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);margin:0;color:#333;line-height:1.6;min-height:100vh}.header{display:flex;justify-content:space-between;align-items:center;padding:15px 5%;background-color:rgba(255,255,255,0.9);box-shadow:0 2px 10px rgba(0,0,0,0.1);backdrop-filter:blur(5px);position:sticky;top:0;z-index:1000}.logo{font-weight:bold;color:#4a90e2;font-size:1.4rem;text-decoration:none}.nav-menu{display:flex;gap:15px}.nav-menu a{text-decoration:none;color:#4a90e2;font-weight:bold;padding:8px 16px;border-radius:20px;transition:all 0.3s ease;border:1px solid transparent}.nav-menu a:hover{background-color:#4a90e2;color:white;transform:translateY(-2px)}.menu-toggle{display:none}main{max-width:1000px;margin:40px auto;padding:20px;background:white;border-radius:15px;box-shadow:0 10px 30px rgba(0,0,0,0.05)}.notice,.alert{padding:15px;margin:20px auto;width:80%;border-radius:8px;text-align:center;animation:fadeIn 0.5s ease}.notice{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}@keyframes fadeIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.auth-container{display:flex;justify-content:center;align-items:center;padding:20px}.auth-card{background:white;padding:40px;border-radius:12px;width:100%;max-width:400px}.auth-card h2{margin-top:0;margin-bottom:25px;text-align:center}.field{margin-bottom:20px}.field label{display:block;font-weight:bold;margin-bottom:5px}.form-control{width:100%;padding:12px;border:1px solid #ddd;border-radius:6px;box-sizing:border-box}.btn-primary{width:100%;background-color:#4a90e2;color:white;padding:12px;border:none;border-radius:6px;font-weight:bold;cursor:pointer}.remember-me{display:flex;align-items:center;gap:8px;margin-bottom:20px}.auth-links{margin-top:20px;text-align:center}@media (max-width: 768px){.menu-hamburger{display:flex;flex-direction:column;justify-content:space-between;width:25px;height:18px;cursor:pointer}.menu-hamburger span{display:block;height:3px;width:100%;background-color:#4a90e2;border-radius:3px;transition:0.3s}.nav-menu{display:none;position:absolute;top:60px;left:0;width:100%;background:white;flex-direction:column;padding:10px 0;box-shadow:0 10px 20px rgba(0,0,0,0.1)}.nav-menu a{width:100%;text-align:center;padding:15px 0;border-radius:0;border-bottom:1px solid #f0f0f0}.menu-toggle:checked~.nav-menu{display:flex}.menu-toggle:checked~.menu-hamburger span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}.menu-toggle:checked~.menu-hamburger span:nth-child(2){opacity:0}.menu-toggle:checked~.menu-hamburger span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}main{margin:20px 10px;padding:15px}}