* {
    box-sizing: border-box;
}

:root {
    font-family: sans-serif;
}

body {
    margin: 0;
}

body > main {
    margin: auto;
    max-width: 1024px;
}

h1.header {
    margin-top: 0.75em;
    text-align: center;
}

fieldset + fieldset,
fieldset + input,
section + section,
section + fieldset
{
    margin-top: 0.75em;
}

input[type="submit"] {
    margin-left: auto;
    display: block;
}

form > fieldset > section > label {
    width: 100%;
    display: block;
}

form > fieldset > section > input, form > fieldset > section > textarea {
    width: 100%;
}

textarea {
    min-height: 10em;
}