.site_button {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 175px;
    height: 50px;
    background: #FFFFFF66;
    font-size: 13px;
    font-weight: var(--font_weight_400);
    font-family: var(--font_Roboto);
    color: var(--black_color) !important;
    position: relative;
    text-transform: uppercase;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--black_color);
    transition: 0.5s !important;
}

.site_button:after {
    position: absolute;
    background: var(--white_color);
    width: 50px;
    height: 50px;
    content: "";
    display: block;
    border-radius: 50%;
    left: 0;
    right: 0;
    margin: auto;
    transition: 1s !important;
    transform: scale(0);
}

.site_button:before {
    position: absolute;
    background: var(--white_color);
    width: 50px;
    height: 50px;
    content: "";
    display: block;
    border-radius: 50%;
    left: 0;
    right: 0;
    margin: auto;
    transition: 1s !important;
    transform: scale(0);
}

.site_button:hover {
    background: var(--primary_color);
}

.site_button:hover:before {
    -webkit-backface-visibility: hidden;
    animation: wave-animate 3s infinite ease-out;
    transform: scale(1);
    transition: 1s !important;
}

.site_button:hover:after {
    transition: 1s !important;
    opacity: 0;
    animation: wave-animate 3s 1.5s infinite ease-out;
    transform: scale(1);
}

@keyframes wave-animate {
    0% {
        transform: scale(0);
        opacity: 1;
        transform-origin: center;
    }

    100% {
        transform: scale(3);
        opacity: 0;
        transform-origin: center;
    }
}

@media all and (min-width: 320px) and (max-width: 767px) {

    .site_button {
        width: 135px;
        height: 35px;
    }

}

@media all and (min-width: 768px) and (max-width: 980px) {

    .site_button {
        width: 140px;
        height: 35px;
    }

}

@media only screen and (min-width: 981px) and (max-width: 1140px) {

    .site_button {
        width: 140px;
        height: 40px;
    }

}

@media all and (min-width: 1141px) and (max-width: 1440px) {

    .site_button {
        width: 140px;
        height: 40px;
    }

}

@media all and (min-width: 1441px) and (max-width: 1880px) {

    .site_button {
        width: 150px;
        height: 45px;
    }

}