body {
    padding: 0;
    margin: 0;
    font-family: '游明朝',
        'Yu Mincho',
        YuMincho,
        'Hiragino Mincho Pro',
        serif;
    color: #ddd;
}


.wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-image: url(/img/earth.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

h1 {
    font-size: min(4vw, 20px);
}

.main-content {
    flex: 1;
    padding: 20px;
    background: linear-gradient(to bottom, #000000ff, #00000033);
}

.main-content p {
    text-align: center;
    margin: 0;
    font-size: min(6vw, 20px);
}

.main-content #realtime,
#rotations {
    font-weight: bold;
    font-size: min(8vw, 32px);
}

header {
    font-size: 10px;
    text-align: left;
    background-color: #222;
    color: #ddd;
    padding: 10px;
}

footer {
    font-size: 10px;
    text-align: center;
    background-color: #222;
    color: #ddd;
    padding: 10px;
}

footer p {
    margin: 0;
}

a {
    color: #fff;
}

@media (min-width: 1200px) {
    footer {
        font-size: 15px;
    }
}