h1 {
    font-family: 'Courier Prime', monospace;
    text-shadow: 0 0 1px black, 0 0 1px black, 0 0 1px black, 0 0 1px black;
    color: #570909;
    font-size: 64px;
    font-weight: 800;
}

h2 {
    font-family: 'Courier Prime', monospace;
    color: #570909;
    font-size: 38px;
    font-weight: 800;
    text-shadow: 0 0 1px black, 0 0 1px black, 0 0 1px black, 0 0 1px black;
}
h3 {
    font-family: 'Courier Prime', monospace;
    color: #570909;
    font-size: 18px;
    font-weight: 800;
  
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(115px, 1fr));
    grid-gap: 10px;
    grid-auto-rows: 150px;
}

.gallery > img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.poster {
    width: 100%;
    height: 100%;
    min-width: 170px;
    min-height: 100px;
    object-fit: cover;
    grid-area: 1 / 1 / 3 / 5;
    z-index: -1;
}


ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #D3D3D3;
    width:auto;
}

li {
  float: left;
  border-right:1px solid #bbb;
}

li:last-child {
  border-right: none;
    background-color: #C0C0C0;
}

li a {
  display: block;
  color: white;
  text-align: center;
  padding: 13px 15px;
  text-decoration: none;
}

li a:hover:not(.active) {
  background-color: #111;
}

.active {
  background-color: #4CAF50;
}

#myBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  font-size: 18px;
  border: none;
  outline: none;
  background-color: red;
  color: white;
  cursor: pointer;
  padding: 15px;
  border-radius: 4px;
}

#myBtn:hover {
  background-color: #555;
    color: #100;
}

nav {
width:auto;

(