body {
  display: flex;
  flex-flow: column;
  height: 100vh;
  margin: 0;
  font-family: Helvetica, sans-serif;
  background-color: #222;
  color: white;
}

.hidden {
  display: none;
}

nav {
  overflow-x: auto;
  font-weight: bold;
  font-size: 12pt;
  display: flex;
}
nav img {
  max-height: 2em;
}
nav a {
  padding: 0.5em 1.5em;
  color: #aaa;
  text-decoration: none;
  white-space: nowrap;
}
nav a[data-no-menu] {
  display: none;
}
nav a:hover {
  background: #555;
}
nav a.active {
  background: #8b8;
  color: black;
}

#app {
  flex-grow: 1;
}
iframe {
  display: block;
  border: none;
  width: 100%;
  height: 100%;
}

.icons {
  margin: auto 2em;
}
.icons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 40em;
  margin: auto;
  gap: 20px;
}
.icons a {
  background-color: #444;
  color: #fff;
  width: 120px;
  height: 120px;
  border-radius: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.icons a img,
.icons a canvas {
  max-width: 75%;
  max-height: 75%;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
}