body {
    background-color: black;
    display: flex;
    justify-content: center;
}


.zalupa {
    margin-top: 200px;

    width: 60%;
    display: flex;
    justify-content: center;
    font-weight: 900;
    transition-duration: 300ms;
}
.zalupa:hover {
    transform: scale(1.1);
}

/*Радуга???))0*/
.zalupa-btn {
    text-decoration: none;
    font-weight: 800;

    background: linear-gradient(
        90deg,
        red,
        orange,
        yellow,
        green,
        cyan,
        blue,
        violet,
        red
    );
    background-size: 400% 400%;

    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;

    animation: rainbow 4s linear infinite;
}

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