style.css

body {
  background-color: #35536f;
}

sup {
  vertical-align: top;
  font-size: 0.6em;
}

#divmap {
  height: 700px;
  width: 90%;
  margin: 2rem auto;
}
#mainmap {
  height: 100%;
  width: 100%;
}

.legend {
  font-style: italic;
}

.directions {
  text-transform: uppercase;
  font-size: 0.7rem;
}

.info {
  padding: 6px 8px;
  font: 14px/16px Arial, Helvetica, sans-serif;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
  border-radius: 5px;
  max-width: 400px;
}
.info h2 {
  margin: 0 0 5px;
  color: rgb(27, 27, 27);
  font-size: 1.2rem;
  line-height: 1.5rem;
}
.info-inner {
  padding: 6px;
}

.btn-style {
  pointer-events: auto;
  z-index: 9999;
  font-size: 40px;
  border-radius: 5px;
  padding: 32px 16px;
  border: solid 1px grey;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
  background: rgba(255, 255, 255, 0.85);
}
button:hover {
  background: rgba(235, 233, 233, 0.9);
}

#btn-next {
  position: absolute;
  right: 12px;
  top: 50%;
}

#btn-previous {
  position: absolute;
  left: 12px;
  top: 50%;
}

@media screen and (max-width: 700px) {
  #divmap {
    width: 100%;
    height: 800px;
    margin: auto;
  }
}
.leaflet-popup-content {
  font-size: 0.85rem;
}

.citation {
  font-size: 0.8rem;
  font-style: italic;
  margin: 2rem;
}

ul.citation {
  list-style-type: circle;
}

.screen-reader-only {
  position: absolute;
  height: 1px;
  width: 1px;
  clip: rect(1px 1px 1px 1px); // IE 6 and 7
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: polygon(0px 0px, 0px 0px, 0px 0px);
  -webkit-clip-path: polygon(0px 0px, 0px 0px, 0px 0px);
  overflow: hidden !important;
}