h1, h2, h3 {
    margin: 0;
}

#content {
    padding: 5px;
}

#navigation {
    display: inline-block;
    vertical-align: top;
    width: 300px;
    background-color: #EEE;
    padding:0px;
}

    #navigation a {
        display: block;
        padding: 5px;
        transition: background-color 0.2s, color 0.2s;
    }

        #navigation a:hover, #navigation a:focus {
            background-color: #DDD;
            color: #333;
        }

        #navigation a.current {
            background-color: #CCC;
            color: #000;
        }

#guide {
    display: inline-block;
    vertical-align: top;
    width: calc(100% - 300px);
    padding: 0 5px 50px 10px;
}

#summary {
    padding: 5px;
    font-style: italic;
}

#description {
    padding: 5px;
}

.column {
    display: inline-block;
    vertical-align: top;
}

    .column.details {
        width: calc(100% - 400px);
        padding-right: 5px;
    }

    .column.media {
        width: 400px;
    }

.mediaBox {
    position: relative;
    margin-bottom: 15px;
    border: 1px solid #CCC;
    border-radius: 5px;
    overflow: hidden;
}

    .mediaBox img {
        width: 100%;
        height: auto;
    }

    .mediaBox iframe {
        display: block;
        width: 100%;
        height: 100%;
        position: absolute;
        top: 0;
        left: 0;
    }

@media (max-width: 1200px) {
    .column.details, .column.media {
        width: 100%;
        display: block;
    }

    .mediaBox {
        max-width: 500px;
        margin: 5px auto 15px auto;
    }
}

@media (max-width: 900px) {
    #navigation, #guide {
        display: block;
        width: 100%;
    }
}