style.css

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body,html{
    background: #787a7a;
    width: 100%;
    height: 100%;
    margin: auto auto ;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 25px;
}

main{
    background: #000000;
    width: 240px;
    height: 350px;
    padding: 10px 10px; 
    border-radius: 15px;
}

button{
    font-size: 25px;
    width: 50px;
    height: 50px;
    margin-bottom: 5px;
    border-radius: 15px;
    background: #f5ba3c;
    border: none;
}

button:hover{
    background: #ffffff;
}

section.tela{
    background: #ffffff;
    height: 50px;
    padding-top: 10px;
    padding-left: 10px;
    margin-bottom: 10px;
    border-radius: 15px;
}


footer button{
    width: 106px;
}