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

h1 {
/*  text-align: center; */
  margin-top: 0px;
  margin-bottom: 0px;
  font-size: 2em;
}

#vmap {
  width: 100%;
  height: 100dvh;
}