body {
    background-color: #f2f2fd;
    font-family: Helvetica, Verdana, Arial, sans-serif;
}
div#main {
    border: solid;
    border-color: black;
    background-color: red;
    position: relative;
    margin-left: auto;
    margin-right: auto;
    margin-top: 20px;
    width: 880px;
    height: 620px;
}
    div#header {
        background-color: #85D2FF;
        margin: auto;
        height: 90px;
        width: 100%;
        overflow: hidden;
        border-bottom: 1px solid #555;
    }
        img#img_header_logo {
            margin: 16px auto auto 14px;
            float: left;
            border:1px solid yellow;
        }
        p#header_title {
            font-family: Helvetica, Verdana, Arial, sans-serif;
            font-size: 44px;
            font-style: normal;
            font-weight: normal;
            float: right;
            margin-top: 19px;
            margin-right: 20px;
        }
    div#navi {
        width: 159px;
        height: 509px;
        background-color: white;
        float: left;
        padding: 10px;
    }
        ul#navi {
            font-family: Helvetica, Verdana, Arial, sans-serif;
            font-size: 22px;
            font-style: normal;
            line-height: 2;
            list-style-type: none;
            list-style-position: outside;
            padding: 0 15px;
            margin: 10px 0;
        }
        a#navi {
            text-decoration: none;
            font-style: normal;
            color: blue;
            background-color: transparent;
        }
            a:hover#navi {
                background-color: #f2f2fd;
                color: black;
            }
    div#content {
        width: 500px;
        height: 509px;
        background-color: white;
        float: left;
        border-left: 1px solid #555;
        border-right: 1px solid #555;
        padding: 10px;
        text-align: center;
    }
    div#gallery {
        width: 179px;
        height: 509px;
        background-color: white;
        float: right;
        padding: 10px 0;
        text-align: center;
        margin: 0;
        display: block;
        overflow: auto;
    }