* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;  
}

.zoom {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: grid;
  place-items: center;
  margin: 0 auto; 
}

.zoom-nav {
  position: fixed;
  top: 2rem;
  left: 2rem;
  z-index: 10;
}

.zoom-nav > button {
  display: block;
  width: 2rem;
  height: 2rem;
  background-color: white;
  border: 2px solid rgba(0,0,0,0.8);
  margin: 0.5rem 0;
  cursor: pointer;
  user-select: none;
}

.zoom-map {
  width: 100%;
  height: 100%;
  fill: rgba(0,0,0,0.8);
}

.active { cursor: move; }