.btt-btn-3eaf14c8 {
    position: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: #333333;
    color: #ffffff;
    cursor: pointer;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.btt-btn-3eaf14c8 i {
    color: #ffffff;
    transition: color 0.3s ease;
}

.btt-btn-3eaf14c8 svg {
    fill: #ffffff;
    width: 1em;
    height: 1em;
    transition: fill 0.3s ease;
}

.btt-btn-3eaf14c8.btt-visible-3eaf14c8 {
    opacity: 1;
    visibility: visible;
}