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

html {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #111;
    background-color: white;
    font: 1.0em/1.0em 'century gothic', 'helvetica neue', helvetica, arial, sans-serif;
}

body {
    display: table-cell;
    vertical-align: middle;
}

a:link, a:visited, a:hover, a:active {
    color: inherit;
    text-decoration: none;
    font-weight: bold;
    transition: 0.75s;
}

a:hover, a:active {
    color: black;
    background: rgba(0%, 0%, 0%, 0.3);
    transition: 0s;
}

p {
    margin: 0 0 1em 0;
}

div.header, div.footer {
    position: absolute;
}

div.header {
    top: 1em;
    right: 1em;
}

div.footer {
    bottom: 1em;
    right: 1em;
}

a.infolink {
    display: block;
    width: 2em;
    height: 2em;
    border-radius: 1em;
    text-align: center;
    line-height: 2em;
}

#tooltip {
    display: none;
    position: absolute;
    right: 0;
    top: 3em;
    width: 22em;
    padding: 1.25em 2.25em;
    background: rgba(100%, 100%, 100%, 0.8);
    border-radius: 0.5em;
    border: 1px solid #111;
    font-size: smaller;
    line-height: 1.75em;
}

#tooltip p {
    margin-top: 0.5em;
}

div#main {
    width: 100%;
    height: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

div.box {
    width: 50%; /* Example: (2+143+2) x 2 */
    float: center;
    margin-right: 0px;
}

div.box.second {
    margin-right: 110;
}

div.box img {
    width: 33%;
    height: auto;
    margin: 2;
}

@media (max-width: 992px)
{
    div.box {
        width: 80%;
    }
}