body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background-color: lightgray;
}

#content_right {
    padding-top: 25px;
    text-align: center;
}
#flag {
    padding: 25px;
}
#footer {
    text-align: center;
    padding: 20px;
    clear: both;
}
#nav_bar {
    color: black;
    font-weight: bold;
    text-decoration: none;
    margin-left: 40px;
}
#nav_bar a {
    color: blue;
    font-weight: bold;
    text-decoration: none;
}
#nav_bar a:hover {
    color: blue;
    text-decoration: underline;
}
#title {
    font-size: 400%;
    font-weight: bold;
}

.nav_link {
    margin-bottom: 20px;
    font-size: larger;
}
.text_block {
    margin: 20px 0 20px 0;
    text-align: left;
    padding-right: 25px;
    font-size: large;
}

@media screen and (orientation: portrait) {
    #content {
        width: 90%;
        margin: 0 auto;
        text-align: center;
    }
    #flag img {
        width: 90%;
    }
    #flyer {
        max-width: 90%;
    }

    .nav_link {
        float: left;
        width: 20%;
        text-align: center;
        font-size: xx-large;
    }
    .text_block {
        margin: 20px 0 40px 0;
    }
}

@media screen and (orientation: landscape) {
    #content {
        width: 90%;
        margin: 0 auto;
    }
    #content_right {
        float: left;
        max-width: 1000px;
        min-width: 900px;
        text-align: left;
    }
    #flag img {
        width: 250px;
    }
    #nav {
        float: left;
        width: 300px;
        margin: 0;
    }
}