.progress-bar {
    background: transparent;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    position: fixed;
    bottom: 30px;
    left: 30px;
    visibility: hidden;
    opacity: 0;
    transition: all 0.3s;
    z-index: 9999;
    border: none;
    box-shadow: none !important;
}

.is-visible {
    visibility: visible;
    opacity: 1;
}

.btn-top {
    font-size: 40px;
    height: 60px;
    width: 60px;
    line-height: 60px;
    position: fixed;
    left: 25px;
    bottom: 28px;
    color: #f06317 !important;
    text-align: center;
    text-decoration: none;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}