style.css

html, body {
  height: 100%;
}

.bg-primary {
    background-color: #17a2b8 !important;
}

.material-icons { color: gray; }

.map-wrapper {
    height: inherit;
}

.card-body {
    font-size: 80%;
}

/*
 * Sidebar
 */
 #sidebar-wrapper {
     width: 40%;
 }
 
 #map-container {
     width: 60%;
 }
 
 #splitbar {
    background-color: gray;
    height: 100%;
    float: right;
    width: 4px;
    cursor: col-resize;
}

.sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100; /* Behind the navbar */
  padding: 50px 0 0; /* Height of navbar */
}

.sidebar-sticky {
  position: relative;
  top: 0;
  height: calc(100vh - 62px);
  padding-top: .5rem;
  overflow-x: hidden;
  overflow-y: auto; /* Scrollable contents if viewport is shorter than content. */
}

@supports ((position: -webkit-sticky) or (position: sticky)) {
  .sidebar-sticky {
    position: -webkit-sticky;
    position: sticky;
  }
}

.sidebar-heading {
  text-transform: uppercase;
}

/*
 * Content
 */

[role="main"] {
  padding-top: 133px; /* Space for fixed navbar */
  height: inherit;
}

@media (min-width: 768px) {
  [role="main"] {
    padding-top: 50px; /* Space for fixed navbar */
    height: inherit;
  }
}

#mapid { 
    height: calc(100vh - 62px);
 }