html {
    min-height: 100%;
}
body {
    background: #333344;
    background: linear-gradient(to bottom, #333344, #2a2a3b);
    background: -moz-linear-gradient(#333344, #333344);
    margin: 20px;
    color: #eee;
    font-family: 'Helvetica Neue', 'Helvetica', sans-serif;
    font-size: 16px;
    overflow: auto;
    text-align: center;
}
a {
    color: inherit;
    text-decoration: underline;
}
canvas {
    display: block;
    border-radius: 8px;
    margin: auto;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
p#error {
    font-weight: bold;
}
h2 {
    color: #eee;
    font-size: 16px;
    margin: 8px;
    text-align: center;
}
main {
    display: inline-flex;
    flex-wrap: wrap;
}
main > div {
    margin: 0 10px;
}
footer {
    color: #bbbbc2;
}