html, body{
    margin: 0;
    width: 100%;
    height: 100%;
    font-family: sans-serif;
}
body{
    background-color: #7E9CBB;
}
main{
    position: fixed;
    display: block;
    width: 100%;
    max-width: 100vh;
    aspect-ratio: 1 / 1;
    z-index: 0;
    right: 5vw;
    top: 0;
}
a{
    color: black;
}
h1{
    color: black;
    mix-blend-mode: overlay;
    font-family: serif;
}
h2{
    font-family: serif;
}

label, p, h2 {
    display: block;
    clear: both;
    width: 400px;
}
label *{
    float: right;
    clear: right;
}
input, button, output, select, option{
    padding: 2px;
    font-size: 11pt;
    font-family: sans-serif;
    min-width: 150px;
    text-align: center;
}
output{
    background: rgba(255,255,255,0.5);
    margin: 2px 0;
}
button{
    background-color: black;
    color: white;
    border: 0;
    margin: 2px 0;
    padding: 6px;
    min-width: 100px;
}
header, footer{
    display: block;
    padding: 10px;
    margin: auto;
    padding-right: 50vw;
    width: 400px;
}

@media screen and (max-aspect-ratio: 16/9) {
    header, footer, main{
        display: block;
        float: none;
        position: relative;
    }
    main{
        margin: auto;
        right: auto;
    }
    header, footer{
        padding: 10px;
    }
}