:root {
    --primary-color: #F3F4F6;
    --secondary-color: #111827;
    --font-size: 2rem;
    --font-family: Helvetica;
   
    /* Mobile-only rules */
    @media only screen and (hover: none) and (pointer: coarse) {
        --font-size: 1rem;
    }
}

body {
    height: 100%;
    margin: 0;

    color: var(--primary-color);
    background-color: var(--secondary-color);

    font-size: var(--font-size);
    font-family: var(--font-family);
    line-height: 1.5;
}

.content {
    display: grid;
    justify-content: center;
    align-content: center;
    position: relative;
}

.under-construction {
    font-size: 12rem;
    text-align: center;
}

.background-image {
    position: relative;
}
  
.background-image:before {
    content: ' ';
    display: block;
    position: absolute;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    opacity: 0.6;
    background-image: url('images/earth-at-night-medium.jpg');
    background-repeat: no-repeat;
    background-position: 50% 0;
    background-size: cover;
}