@keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
        }
        
        @keyframes blink {
            0%, 50% { opacity: 1; }
            51%, 100% { opacity: 0; }
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .animate-float {
            animation: float 3s ease-in-out infinite;
        }

        .animate-fadeIn {
            animation: fadeIn 0.6s ease-out forwards;
        }
        
        .grid-bg {
            background-image: 
                linear-gradient(rgba(59, 130, 246, 0.1) 1px, transparent 1px),
                linear-gradient(90deg, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
            background-size: 50px 50px;
        }
        
        .glass {
            backdrop-filter: blur(10px);
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(59, 130, 246, 0.2);
        }
        
        .sidebar-mobile {
            transform: translateX(-100%);
            transition: transform 0.3s ease;
        }
        
        .sidebar-mobile.open {
            transform: translateX(0);
        }
        
        @media (max-width: 768px) {
            .desktop-sidebar {
                display: none;
            }
            .header-nav {
                display: none;
            }
        }

        .support-card {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        .support-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
        }

        .faq-item {
            transition: all 0.3s ease;
        }

        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-item.active .faq-content {
            max-height: 200px;
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
        }

        .header-nav-link {
            color: rgba(156, 163, 175, 1);
            text-decoration: none;
            transition: color 0.2s ease;
            font-size: 0.9rem;
        }

        .header-nav-link:hover {
            color: rgba(59, 130, 246, 1);
        }

        .auth-link {
            color: white;
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 0.5rem;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.2s ease;
        }

        .login-btn {
            background: transparent;
            border: 1px solid rgba(59, 130, 246, 0.5);
        }

        .login-btn:hover {
            background: rgba(59, 130, 246, 0.1);
            border-color: rgba(59, 130, 246, 1);
        }

        .register-btn {
            background: linear-gradient(135deg, #3b82f6, #8b5cf6);
        }

        .register-btn:hover {
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            transform: translateY(-1px);
        }

        .contact-form {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(59, 130, 246, 0.3);
        }

        .form-input {
            background: rgba(30, 41, 59, 0.8);
            border: 1px solid rgba(71, 85, 105, 0.5);
            transition: all 0.3s ease;
        }

        .form-input:focus {
            border-color: rgba(59, 130, 246, 0.8);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        .submit-btn {
            background: linear-gradient(135deg, #3b82f6, #8b5cf6);
            transition: all 0.3s ease;
        }

        .submit-btn:hover {
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
        }