*{
    box-sizing: border-box;
}

body{
    background-color: purple;
}

main{
    text-align: left;
    border: 3px solid black;
    border-radius: 10px;
    background-color: rgb(21, 194, 21);
    width: 70%;
    font-size: larger;
    margin: 10px;
    padding: 10px;
}