div {
    box-sizing: border-box;
}
body {
    background-color: #cceeff;
    margin: 5px;
    padding: 0;
    font-family: Calibri, Verdana, Geneva, Arial, Helvetica, sans-serif;
    color: #006699;
    font-size: 1em;
}
#main {
    max-width: 50vw;
    margin: 0 auto;
    text-align: center;
    flex-direction: column;
}
#header {
    position: relative;
    /* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#387a99+0,748c99+100 */
    background: #387a99; /* Old browsers */
    background: -moz-linear-gradient(
        top,
        #387a99 0%,
        #748c99 100%
    ); /* FF3.6-15 */
    background: -webkit-linear-gradient(
        top,
        #387a99 0%,
        #748c99 100%
    ); /* Chrome10-25,Safari5.1-6 */
    background: linear-gradient(
        to bottom,
        #387a99 0%,
        #748c99 100%
    ); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#387a99', endColorstr='#748c99',GradientType=0 ); /* IE6-9 */
    border: 2px solid #006699;
    box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.5);
    border-radius: 20px;
    width: 50%;
    margin: 0 auto;
}
#header img {
    margin: 1% 0 0.5% 1%;
    box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.5);
    border-radius: 20px;
}
#email {
    color: #fff;
    font-size: 150%;
    margin-bottom: 2px;
    text-shadow: 5px 5px 5px rgba(0, 0, 0, 0.5);
}
#content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 15px;
}
#content div {
    flex: 0 1 auto;
    text-align: center;
    border-radius: 20px;
    box-shadow: 5px 5px 5px rgba(0, 0, 0, 0.5);
    border: 1px solid #006699;
    overflow: hidden;
    margin: 10px 10px 10px 10px;
}
#content div:hover {
    opacity: 0.5;
}
#content div img {
    width: 100%;
    height: 100%;
}
#footer {
    color: #fff;
    margin: auto 0;
    text-align: center;
    font-weight: bold;
    text-shadow: 0 0 3px rgba(0, 0, 0, 0.7);
    font-size: 125%;
}
a {
    text-decoration: none;
    color: #fff;
}
a:hover {
    color: yellow;
}
/* hide from IE mac \*/
/*html {overflow: scroll;}*/
/* end hiding from IE5 mac */

@media only screen and (max-width: 480px) {
    #content {
        min-width: 0;
    }
    #email {
        font-size: 110%;
    }
}