.cd-top {
    background-size: 64px;
    border-radius: 300px;
    bottom: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    height: 18px;
    left: 20px;
    opacity: 0;
    overflow: hidden;
    padding: 20px 0;
    position: fixed;
    -webkit-transition: opacity 0.3s 0s, visibility 0s 0.3s;
    -moz-transition: opacity 0.3s 0s, visibility 0s 0.3s;
    transition: opacity 0.3s 0s, visibility 0s 0.3s;
    visibility: hidden;
    white-space: nowrap;
    width: 40px;
    height: 40px;
    z-index: 100000000;
    -webkit-border-radius: 300px;
    -moz-border-radius: 300px;
    -ms-border-radius: 300px;
    -o-border-radius: 300px;
    justify-content: center;
    align-items: center;
    border: none;
    cursor: pointer;
}

.cd-top.cd-is-visible {
    bottom: 15px;
    opacity: 1;
    visibility: visible;
    background-color: var(--primary-color);
}

.cd-top i {
    color: white;
    margin: 0 auto;
}