.back-to-top {
        position: fixed;
        bottom: 20px;
        right: 20px;
        display: none;
        background-color: #2bbf54;
        color: #fff;
        font-size: 24px;
        border-radius: 50%;
        width: 60px;
        height: 60px;
        display: flex;
        justify-content: center;
        align-items: center;
        cursor: pointer;
        z-index: 1000;
    }

    .back-to-top:hover {
        background-color: #444;
    }