@keyframes btnjum {

    0% {
        transform: translateY(-10px);
    }
    50% {
        transform: translateY(10px);
    }
    100% {
        transform: translateX(0px);
    }
}

.btn {
    animation: bounce 3s infinite;
}



nnn {
background-attachment: fixed ; 
height: 100%;   


}