html, body {
    margin: 0;
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    margin: 1rem;  /* 0rem --> needed to avoid a white border around the main window */
        
    font-family: "Noto Sans", Helvetica, sans-serif;
    font-size: 62.5%;
}

:root {
    --bg-white: #ffffff;
    --bg-light-grey: #F0F0F0;

    --f-black: #000000;

    --f-size-h1: 2.6rem;
    --f-size-h2: 2rem;
    --f-size-h3: 1.5rem;
}

@media screen and (max-width: 1080px) {
    :root {
        --f-size-h2: 1.6rem;
        --f-size-h3: 1.3rem;
    }
}

@media screen and (max-width: 800px) {
    :root {
        --f-size-h2: 1.2rem;
        --f-size-h3: 1rem;
    }
}

@media screen and (max-width: 600px) {
    :root {
        --f-size-h1: 2rem;
    }
}


html, body {
    padding: 0;
    margin: 0;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: var(--f-black);
    font-family: 'Roboto', sans-serif;
    font-weight: 400;
    letter-spacing: 0.3px;
}

body:before {
    content: "";
    display: block;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100vh;
    z-index: -10;
    background: var(--bg-white) no-repeat center center;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}


a:link, a:active, a:visited {
    color: var(--f-black);
    background-color: transparent;
    text-decoration: none;
}

a {
    letter-spacing: 0.3px;
}

p {
    line-height: 150%;
    letter-spacing: 0.3px;
}

@media screen and (max-width: 600px) {
    .mobile {
        display: block;
    }
    .desktop {
        display: none;
    }
    
}

@media screen and (min-width: 601px) {
    .mobile {
        display: none;
    }
    .desktop {
        display: block;
    }
    .left {
        float: left;
        width: calc(50% - 40px);
        padding: 20px;
    }
    .right {
        float: left;
        width: calc(50% - 40px);
        padding: 20px;
        height: 100%;
        max-width: 700px;
    }
}