body {
    background-color: darkgray;
    margin-top: 20px;
    margin-bottom: 20px;
}

.directory {
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.citation:link {
    text-align: center;
    border-style: none;
    background-color: transparent;
    color: blue;
}

.citation:visited {
    text-align: center;
    border-style: none;
    background-color: transparent;
    color: purple;
}

.citation:hover {
    text-align: center;
    border-style: none;
    background-color: transparent;
    color: blue;
    text-decoration: none;
}

.citation:active {
    text-align: center;
    border-style: none;
    background-color: transparent;
    color: purple;
}

a {
    border-style: solid;
    border-color: black;
    background-color: gray;
    color: black;
    border-spacing: 100%;
    padding: 5px;
    border-radius: 25%;
    margin: 5px;
}

a:hover {
    border-style: solid;
    border-color: black;
    background-color: rgb(168, 168, 168);
    color: black;
}

.selected {
    background-color: rgb(255, 132, 132);
}

hr {
    border-color: black;
    margin: 25px;
}

h1 {
    text-align: center;
}

h2 {
    text-align: center;
}

h4 {
    text-align: center;
}

video {
    width: 50%;
    height: auto;
}

#video {
    text-align: center;
}

footer {
    text-align: center;
}

#unityImg {
    border-top-left-radius: 30px;
}

#unrealImg {
    border-top-right-radius: 30px;
}

#sourceImg {
    border-bottom-left-radius: 30px;
    border-bottom-right-radius: 30px;
}

.engineImg {
    width: 100%;
    height: 200px
}

.row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center
}

figcaption {
    font-size: 32px;
    text-align: center;
}

.smallLine {
    width: 50%;
    margin: auto;
}

p {
    text-indent: 4em;
    font-size: 20px;
    margin: 25px;
}

iframe {
    width: 50%;
    aspect-ratio: 16/9;
}

.img {
    width: 256px;
    height: 256px;
    display: flex;
    flex-wrap: wrap;
    margin: 0 auto;
    padding-bottom: 15px;
}