@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.link-button{
    border-radius: 8px;
    overflow: hidden;
    appearance: none;
    box-sizing: border-box;
    border: 0;
    font: inherit;
    vertical-align: baseline;
    outline: none;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
    cursor: pointer;
    animation: fadeIn .3s forwards;
    top: 0;
    width: 364px;
    transition: background .3s, opacity 0s, top 0s;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    font-size: 16px;
    line-height: 22px;
    margin-top: 10px;
    text-align: center;
    position: relative;
    height: 62px;
}

.link-button::after{
    content: "";
    position: absolute;
    top: -75%;
    left: -75%;
    width: 250%;
    height: 250%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0) 60%);
    transform: translateX(-50%) rotate(45deg);
    transition: all .5s;
    opacity: 0;
    animation: shine 4s infinite;
}

@keyframes shine {
    0%,20%,100% {
        opacity: 0;
        transform: translateX(-50%) rotate(45deg)
    }

    50% {
        opacity: 1;
        transform: translateX(150%) rotate(45deg)
    }
}

.link-button a{
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    font-size: calc(15px + 2 * (100vw - 320px) / 1600);
    width: 100%;
    height: 100%;
}

@media (max-width: 700px) {
    .link-button {
        max-width: 364px;
    }
    .link-button a{
        font-size: 10px;
    }
}