body {
    background-color: orange;
}

header {
    padding: 20px 20px 20px 20px;
}

h1 {
    text-align: center;
    font-size: 65px;
    font-family: 'Times New Roman', Times, serif;
    text-transform: uppercase;
    font-style: italic;
}

red {
    color: red;
}

white {
    color: white;
}

blue {
    color: blue;
}

nav {
    text-align: center;
}

#author {
    font-style:italic;
}

div {
    text-align: center;
}

#introduction {
    font-size: 20px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    line-height: 1;
}

.topic {
    font-size: 15px;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    line-height: 1.5;
}

.topic li {
    background-color: white;
    border: 5px solid lightblue;
    font-weight: bold;
}

.topic li img {
    display: block;
    width: 50%;
    height: 40%
    margin: auto;
}

/*Style link*/
a:link {
    color: #1098ad;
    text-decoration: none;
}

a:visited {
    color: grey;
}

a:hover {
    color: orangered;
    font-weight: bold;
    text-decoration: underline dotted orangered;
}

a:active {
    background-color: grey;
    font-style: italic;
}


#copyright {
    font-size: 13px;
    font-style: italic;
}