body
{
    background-color: grey;
    padding: 50px;
}

h1
{
    color: rgb(255, 255, 255);
    font-size: 3em;
    font-family: Arial, Helvetica, sans-serif;
}

p
{
       color: rgb(255, 255, 255);
       font-family: Arial, Helvetica, sans-serif;
       margin: 0;
}

form
{
    background-color: #000000c9;
    width: 450px;
    height: 350px;
    text-align: center;
    margin: auto;
    padding: 10px;
    border-radius: 25px
}

#textBox
{
    margin-bottom: 5px;
    width: 150px;
    height: 25px;
    font-size: 2em;
    text-align: center;
}

#calcButton
{
    margin: 10px 0px 10px 0px;
}

button
{
    font-size: 1.5em;
    font-family:'Times New Roman', Times, serif;
    font-weight: bold;
}

button:hover
{
    padding: 5px;
}