.bg-gradient-animated {
            background: linear-gradient(-45deg, #0c0c0c, #1a1a2e, #16213e, #0f172a);
            background-size: 400% 400%;
            animation: gradient 6s ease infinite;
        }

        @keyframes gradient {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .glass {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .neon-border {
            box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
            border: 1px solid rgba(102, 126, 234, 0.4);
        }

        .spinner {
            width: 16px;
            height: 16px;
            border: 2px solid rgba(255, 255, 255, 0.2);
            border-top: 2px solid #ffffff;
            border-radius: 50%;
            display: inline-block;
            animation: spin 1s linear infinite;
            margin-right: 8px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }