body {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
#radius {
    width: 100px;
    margin: auto;
}

#formula{
    width: 100px;
    margin:auto;
}

#colorText {
    width: 100px;
    margin: auto;
}

#calculate {
    width: 100px;
    margin: auto;
}
h2 {
    text-align: center;
}
h1 {
    text-align: center;
}
p {
    text-align: center;
    font-size: 30px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}
main {
    display: flex;
    justify-content: center;
    flex-direction: column;
    width:600px;
    background-color: rgb(141, 141, 199);
    color: white;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    margin: auto;
    padding:10px;
}