.back-to-top {
    width: 40px;
    height: 40px;
    position: fixed;
    bottom: 0;
    right: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s, transform 0.2s, bottom 0.3s;
    z-index: 999;
}

.back-to-top.active-to-top {
    bottom: 45px;
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover svg {
    transform: scale(1.1);
    transition: transform 0.2s;
}