footer {
    background-color: #101112;
    padding: 25px;
    color: #ffffff;
    text-align: center;
}

.up-btn {
    position: fixed;
    width: 50px;
    height: 50px;
    right: 30px;
    bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    color: #ffffff;
    background-color: #146c45;
    border-radius: 10px;
    font-size: 20px;
    z-index: 998;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
}

.up-btn.show {
    opacity: 1;
    pointer-events: auto;
}

/* Responsivo */
@media (max-width: 600px) {
    .up-btn {
        width: 40px;
        height: 40px;
        right: 20px;
        bottom: 20px;
        font-size: 15px;
    }
}