header{
    text-align: left;
    margin-left: 5%;
    font-weight: bold;
    font-size: 200%;
}

#textbox{
    background-color: rgb(135, 140, 145);
    border-radius: 40px 15px 40px 15px;
    color: white;
    margin-left: 5%;
    margin-right: 5%;
    text-align: center;
    font-size: 85px;
}

#img_uc{
    display: flex; 
    justify-content: center; 
    align-items: center;
}

footer{
    text-align: center;
}