html {
    box-sizing: border-box;
}

*, *before, *after {
    box-sizing: inherit;
}

#wrapper {
    width: 1000px;
    margin:10px auto;
    padding:10px;
    border-radius: 8px;
    background-color:rgb(29, 129, 223);
}

nav {
    float:left;
    width:250px;
    background-image: linear-gradient(to left, rgb(29, 77, 29), navy);
    border-radius:8px;
}

nav li {
    padding:3px;
}

nav a:link, a:link {
    color:goldenrod;
}

nav a:visited, a:visited {
    color:rgb(127, 100, 226);
}

nav a:hover a:hover {
    outline: solid 1px aquamarine;
}

nav a:focus a:focus{
    outline: solid 1px aquamarine;
}

nav a:active a:active {
    color:orangered;
}

main {
    float:left;
    padding: 0px 20px 20px 20px;
    width: 670px;
}

footer {
    clear:both;
    padding:8px;
    background-color:navy;
    border-radius:8px;
    width:360px;
}

.background {
    background-color: lavender;
}

#logo {
    display:block;
    width: 465px;
    height: 79px;
    margin: 16px;
    padding:12px;
    border-radius: 8px;
    text-indent: -1000em;
    font-size: 3em;
    background:url(../04-floatingzoo/images/zoo_logo.png) no-repeat center;
    background-color:silver;
}

#species div {
    width: 200px;
    height: 153px;
    text-align:center;
    border: 4px solid black;
    margin: 40px;
    float: left;
}

.business-font {
    font-family: 'Times New Roman', Times, serif;
    font-style: italic;
}

#business-background {
    background-color: aquamarine;
}

#species-background {
    background-color: violet;
}

.body-font {
    font-family:Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
}

.species-font {
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    background-color:goldenrod;
    font-size:large;
}

.return-button {
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
    margin-left: 0.5rem;
    padding-left: 0.8rem;
    background: rgb(22, 22, 22);
    border-radius: 4px;
    transition-duration: 300ms;
    width: 226px;
    box-shadow: 2px 2px black;
    font-family: sans-serif;
}

.return-button:hover {
    background: rgb(45, 45, 45);;
    transition-duration: 300ms;
}

.return-button a {
    color: white !important;
    text-decoration: none;
}

.return-button p {
    margin: 0;
    padding-top: 0.8rem;
    padding-bottom: 0.8rem;
}

.normal-background {
    background: none;
}