@charset "UTF-8";
html {
    background-color:navy;
}
body {
    font-family: Verdana, Geneva, sans-serif;
    color: rgb(91, 91, 91);
    background-color: ivory;
    width: 90%;
    margin-left: auto;
    margin-right: auto;
}
header {
    text-align: center;
    padding: 20px;
}
h1 {
    text-shadow: gray 4px 6px 5px;
}
h2 {
    font-size: 1.3em;
    text-shadow: gray 4px 6px 5px;
}
/* nav {
    background-color: teal;
    padding: 15px;
    text-align: center;
}
nav a {
    padding-left: 10px;
    padding-right: 10px;
    text-decoration: none;
    color: white;
}
nav a:hover {
    text-decoration: underline;
    color: rgba(102, 102, 102, 0.6);
} */
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
nav li {
    display: block;
    width: 20%;
    float: left;
}
nav a {
    display: block;
    background-color: teal;
    line-height: 2.8em;
    text-decoration: none;
    text-align: center;
}
nav a:hover {
    background-color: blue;
    color: white;
}
main {
    padding: 20px;
    margin-top: 35px;
}
main > img {
    width: 25%;
    padding: 25px;
    float: right;
}
body > footer {
    clear: both;
    background-color: teal;
    color: rgba(102, 102, 102, 0.6);
    font-weight: bold;
    text-align: center;
    margin-top: 10px;
    padding: 10px;
    font-size: 0.9em;
    line-height: 3em;
}
ul {
    list-style-type: square;
}
header > img {
    width: 100%;
}
div.gallery {
    display: flex;
    flex-flow: wrap;
}
div.imgGallery {
    flex: 23%;
    max-width: 25%;
    padding: 0 4px;
}
div.imgGallery img {
    width: 100%;
}
table {
    width: 100%;
    border: 10px double navy;
    border-spacing: 5px;
}
th, td {
    height: 35px;
    border: 1px solid gray;
    padding: 10px;
}
thead, tfoot {
    background-color: teal;
    color: white;
}
tbody tr:nth-of-type(even) {
    background-color: lightgray;
}
@media only screen and (max-width: 1100px) {
    div.imgGallery {
        flex: 48%;
        max-width: 50%;
    }
}
@media only screen and (max-width: 768px) {
    body {
        width: 100%;
        margin: 0;
    }
    nav li {
        float: none;
        font-size: x-large;
        width: 100%;
    }
    nav a {
        border-bottom: solid black 1px;
    }
    main > img {
        width: 90%;
        float: none;
    }
    div.imgGallery {
        flex: 100%;
        max-width: 100%;
    }
    table, tbody, tr, td, th {
        display: block;
    }
    thead, tfoot {
        display: none;
    }
    tbody td {
        position: relative;
        padding-left: 40%;
        overflow: visible;
        height: auto;
    }
    td::before {
        content: attr(data-label);
        position: absolute;
        top: 0px;
        left: 0px;
        padding: 10px;
        width: 40%;
        white-space: nowrap;
    }
}
@media only screen and (min-width: 769px) {
    html {
        background-image: url("backgroundimage.png");
        background-repeat: no-repeat;
        background-attachment: fixed;
        background-position: center center;
        background-size: cover;
    }
}