html, body {
    font-size: 18px;
}

#conway {
    border: 1px solid green;
}
#wrapper {
    width: 1024px;
    margin: 0 auto;
    background-color: lightblue;
}

section {
    display: flex;
    justify-content: space-around;
}

#glider-copy {
    width: 30px;
    height: 30px;
    position: absolute;
    background-color: aquamarine;
    background-image: url('glider.png');
    z-index: 100;
}

nav {
    width: 100%;
    padding-bottom: 20px;
    margin-bottom: 20px;
    background-color: pink;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-bottom: 1px solid black
}

h1 {
    font-size: 2.5em;
    text-align: center;
}

#left {
    width:60%;
}

#right {
    width: 30%;
}

button {
    height: 3em;
    width: 8em;
}

p, h1, h2, h3, h4, h5, h6, img {
    margin-left: 15px;
}

#rules {
    margin-right: 3em;
    display: flex;
    justify-content: left;
    align-items: center;
}

.shape {
    border: 1px solid darkblue;
}

.active {
    background-color: cadetblue;
    border: 1px solid red;
}

.shape:hover {
    background-color: cadetblue;
    border: 1px solid red;

}

p, li {
    font-size: 1.2em;
}

h4 {
    font-size: 1.8em;
}

li {
    list-style: none;
    line-height: 1.5em;
}

#controls-menu {
    display: flex;
    justify-content: left;
    align-items: center;
    padding-inline-start: 0;
}

#controls-menu li {

    text-align: center;
    padding: .5em 1.2em;
    border: 1px solid black

}

#controls-menu li:hover {
    background-color: bisque;
}

.hidden {
    display: none;
}