body {
    background-color: white;
    font-family: sans-serif;
    text-align: center;
    width: 100%;
    height: 100%;
    min-height: 50%;
    min-width: 800px;
    margin: auto;
    /*overflow: hidden;*/
}

header {
    background-color: grey;
    font-size: 3em;
    padding-bottom: 20;
    padding-top: 20;
    color: white;
    width: 100%;
    min-width: 600px;
}

section {
    width: 800px;
    margin: auto;
    font-size: 40px;
    text-align: center;
}

button {
    font-size: 30px;
    padding: 5 30;
    width: 300px;
    height: 100px;
    margin: auto;
    background-color: transparent;
    border-color: silver;
    border-style: solid;
    border-radius: 8;
    border-width: 2;
    outline: none;
}

footer {
    padding: 5;
}