@font-face {
    font-family: 'Retro Gaming';
    src: url('Retro Gaming.ttf') format('truetype');
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  margin: 0;
  font-family: 'Verdana', sans-serif;
  background-color: #111;
  color: #eee;
  display: flex;
  flex-direction: column; /* stack main and footer */
}

.main {
  flex: 1; /* fill space before footer */
  display: flex; /* your side-content-side layout */
}

footer {
  text-align: center;
  background-color: #222;
  color: #666;
  font-size: 11px;
}

h2 {
    color: #ffbf36;
    padding-left: 20px;
}

h1 {
    color: #909089;
}

.content::-webkit-scrollbar {
    width: 0;
    background: transparent;
}

.side {
    width: 20%;
    background-image: url('images/background.png');
    background-repeat: repeat-y;
    background-size: cover;
}

@media (max-width: 768px) {
    .side { display: none; } /* hide sides on mobile */
    .content { width: 100%; }
}

.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: left;
    padding: 20px;
    overflow-y: auto;
    background-color: #222;
    width: 60%;
    scrollbar-width: none;
}

.logo {
    max-width: 100%;
    margin: 10 auto;
    background-image: url('images/img_title.png');
    background-position: center;
    background-size: contain;
    aspect-ratio: 1072 / 399; /* maintain original proportions */
}

nav {
    text-align: center;
}

nav button {
    background-color: #444;
    color: #eee;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    font-size: 16px;
}

nav button:hover {
    background-color: #666;
}

ul ul {
    margin-left: 20px;
    list-style-type: square;
}

details summary {
    cursor: pointer;
    background-color: #333;
    padding: 10px;
    border: 1px solid #555;
    color: #eee;
    font-family: 'Retro Gaming', sans-serif;
    font-size: 11px;
}

details[open] summary {
    background-color: #444;
}