html, body {
  margin: 0;
  padding: 0;
  background: #111;
  color: #eee;
  font-family: sans-serif;
}

#game-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Map */

#map {
  display: grid;
  grid-template-columns: repeat(10, 32px);
  grid-template-rows: repeat(10, 32px);
  padding: 16px;
}

/* Menu button */

#menu-button {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 18px;
  padding: 6px 10px;
  cursor: pointer;
}

/* Menu */

#menu {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #222;
  border: 1px solid #555;
  padding: 16px;
}

#menu button {
  display: block;
  width: 100%;
  padding: 8px;
  margin-top: 8px;
}

.hidden {
  display: none;
}