header, main, nav, footer, figure, figcaption, aside, section, article {
    display: block;
}

#contact {
    font-size: 90%;
}

#mobile {
    display: none;
}

#desktop {
    display: inline;
}

@media only screen and (max-width: 64em) {

    body {
        margin: 0;
        background-color: #FFFFFF;
    }

    #wrapper {
        min-width: 0;
        width: auto;
        box-shadow: none;
        border: none;
    }

    header {
        padding: 0.5em 0 0.5em 0;
        height: auto;
    }

    h1 {
        letter-spacing: 0.1em;
    }

    main {
        margin-left: 0;
    }

    nav {
        float: none;
        width: auto;
        text-align: center;
        padding: 0.5em;
    }

    nav li {
        display: inline;
        padding: 0.25em 0.75em;
    }

    #heroHome, #heroBoard, #heroTraining {
        margin-left: 0;
        height: 200px;
    }

    footer {
        margin-left: 0;
    }
}

@media only screen and (max-width: 37.5em) {

    main {
        padding: 0.1em 1em;
        font-size: 90%;
    }

    h1 {
        font-size: 2em;
    }

    nav {
        padding: 0;
    }

    nav li {
        display: block;
        margin: 0;
        border-bottom: 2px solid #330000;

    }

    nav a {
        display: block;
    }

    #heroHome, #heroBoard, #heroTraining {
        background-image: none;
        height: 0;
    }

    #mobile {
        display: inline;
    }

    #desktop {
        display: none;
    }
}

* {
    box-sizing: border-box;
}

body {

    background-color: #FFFFFF;
}

header {
    background-color: #00B386;
    color: #FFFFFF;
    height: 175px;
    padding-top: 30px;
    padding-left: 3em;
    box-shadow: 0 4px 4px #133926;
font-family:serif;
font-weight:bold;
text-align: center;
}

a {
text-decoration: none;
}

nav {
    padding: 1.5em;
    font-size: 120%;
    float: left;
    width: 160px;
font-family:Arial,sans-serif;

}

nav ul {list-style-type: none;}
header h1 {font-size: 350%;}
#wrapper {
    width: 80%;
    margin: 0 auto;
    background-color: #0C5442;
    min-width: 900px;
    max-width: 2050px;
    box-shadow: 0 0 4px #133926;
    border: 1.5pt solid #003300;
    background-image: linear-gradient(to bottom, #FFFFFF, #0C5442);
}

main {
    background-color: #FFFFFF;
    margin-left: 190px;
    padding-left: 30px;
}

h2 {
    color: #00664D;
    text-shadow: 1px 1px #CCCCCC;
}

footer {

    margin-left: 190px;
    padding: 15px;
    background-color: #FFFFFF;
}

#heroHome, #heroBoard, #heroTraining {
    margin-left: 190px;
}

main ul {
    list-style: none;
    margin: 0;
    padding-left: 0;
    font-size: 1.2em;
}

nav a:link {
    color: #00664D;
}

nav a:visited {
    color: #7A7A52;
}

nav a:hover {
    color: #FFFFFF;
}

#heroHome {
    height: 300px;
    background-image: url('sunsetHorse.png');
    background-size: 100% 100%;
}

#heroBoard {
    height: 300px;
    background-image: url('fenceline.png');
    background-size: 100% 100%;
}

#heroTraining {
    height: 300px;
    background-image: url('BayBella.png');
    background-size: 100% 100%;
}