.video-bg {
            position: fixed;
            right: 0;
            bottom: 0;
            min-width: 100%;
            min-height: 100%;
            z-index: -1;
        }
        .overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: -1;
        }
        @media (max-width: 640px) {
            .video-bg, .overlay {
                display: none;
            }
            .reset-prompt {
                margin-left: 0;
                width: 100%;
                max-width: none;
                position: static;
                height: 100vh;
                display: flex;
                flex-direction: column;
                justify-content: center;
            }
        }
        .shake {
            animation: shake 0.3s ease-in-out;
        }
        @keyframes shake {
            0%, 100% {
                transform: translateX(0);
            }
            25% {
                transform: translateX(-5px);
            }
            50% {
                transform: translateX(5px);
            }
            75% {
                transform: translateX(-5px);
            }
        }