#app {
  background-size: cover;
  background-position: center center;
  padding: 0;
  margin: 0;
}

#app::selection {
  background-color: red;
  color: white;
}

#app * {
  outline: none;
}

#app #menu {
  position: absolute;
  right: 0;
  top: 0;

  z-index: 100;
  margin-top: 4px;
}