*
{
    box-sizing: border-box;
}
body
{
    margin: 0;
}
body.dark
{
    background-color: #000000;
    color: #FFFFFF;
}
h1
{
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    text-align: center;
}
body > p:first-of-type:not(.credits)
{
    width: 100%;
    text-align: center;
    font-family: sans-serif;
    background-color: #008800;
    color: #FFFFFF;
    padding: 2%;
}
body > p:first-of-type:not(.credits) > *
{
    color: inherit;
}
.center
{
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    text-align: center;
    padding: 2%;
    width: 100%;
}
form
{
    padding: 1%;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
}
form > input
{
    padding: 0.5rem;
    width: 30%;
}
form > input:focus
{
    outline: none;
}
form > button
{
    margin: 1%;
    padding: 0.4rem 0.9rem;
    cursor: pointer;
}
body.dark form > button
{
    background-color: #333333;
    color: #FFFFFF;
    border: 1px solid;
}
.credits
{
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: center;
}
@media screen and (max-width: 800px)
{
    form > input
    {
        width: 50%;
    }
}
@media screen and (max-width: 450px)
{
    form > input
    {
        width: 80%;
    }
}