*{
    margin: 0;
    padding: 0;
    border: 0;
    list-style: none;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

#banner{
    width: 100%;
    height: 100vh;
    background-color: #777;
    position: relative;
}

#banner .anterior,
#banner .proximo{
    width: 70px;
    height: 70px;
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    position: absolute;
    top: calc(50% - 70px);
    left: 100px;
}

#banner .proximo{
    left: initial;
    right: 100px;
}

#banner .material-icons{
    font-size: 50px;
}

#banner i:hover, #banner ol li:hover{
    cursor: pointer;
}

#banner ul,
#banner li{
    width: 100%;
}

#banner li img{
    height: 100vh;
    margin: 0 auto;
    display: none;
}

#banner li img.visivel{
    display: block;
}

#banner ol{
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 16px;
}

#banner ol li{
    width: 16px;
    height: 16px;
    border-radius: 10px;
    gap: 10px;
    border: 2px solid #fff;
    transition-duration: 0.2s;
}

#banner ol li.visivel{
    background-color: #fff;
}