.modal-button {
    cursor: pointer;
    position: fixed;
    right: 120px;
    bottom: 20px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    z-index: 9999;
    background-color: #25a5d3;
    color: #ffffff;
    background-image: url("data:image/svg+xml,%3Csvg aria-hidden='true' xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none' viewBox='0 0 24 24'%3E%3Cpath stroke='%23ffffff' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M18.427 14.768 17.2 13.542a1.733 1.733 0 0 0-2.45 0l-.613.613a1.732 1.732 0 0 1-2.45 0l-1.838-1.84a1.735 1.735 0 0 1 0-2.452l.612-.613a1.735 1.735 0 0 0 0-2.452L9.237 5.572a1.6 1.6 0 0 0-2.45 0c-3.223 3.2-1.702 6.896 1.519 10.117 3.22 3.221 6.914 4.745 10.12 1.535a1.601 1.601 0 0 0 0-2.456Z'/%3E%3C/svg%3E%0A");
    background-size: 50%;
    background-repeat: no-repeat;
    background-position: 50% 50%;
    border: 0 solid #25a5d3;
}

.modal-button:after {
    content: " ";
    display: block;
    position: absolute;
    border-radius: 50%;
    border: 1px solid #25aad3;
    left: -20px;
    right: -20px;
    top: -20px;
    bottom: -20px;
    animation: border-animate 1.5s linear infinite;
    opacity: 0;
}
.modal-button:after{
    animation-delay: .5s;
}
@keyframes border-animate
{
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: scale(1.2);
        opacity: 0;
    }
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: white;
    margin-left: auto;
    margin-right: auto;
    margin-top: calc(50vh);
    transform: translateY(-60%);
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
    max-width: 500px;
    border-radius: 5px;
    text-align: center;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    margin-top: -6px;
}

.close:hover {
    color: black;
}