style.css

body,
html {
  padding: 0;
  margin: 0;
  height: 100%;
  width: 100%;
  background-color: #2b2b2b;
}

* {
  /*border: 1px solid black;*/
  box-sizing: border-box;
  color: rgba(255, 255, 255, 0.9);
}

#container {
  width: 90%;
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
}

#container h1 {
  width: 100%;
  margin: 30px 0;
}

#map {
  /*background: url(https://api.fnkr.net/testimg/1280x750/00CED1/FFF/?text=map) no-repeat center;*/
  width: calc(75% - 40px);
  height: 80vh;
  border-radius: 5px;
  overflow: hidden;
  z-index: 0;
  box-shadow: -5px 5px 16px 1px rgba(0, 0, 0, 0.57);
}

#list {
  width: 25%;
  height: 80vh;
  padding: 0 20px;
  margin-left: 20px;
}

#list h2 {
  margin-top: 0;
  padding-left: 0;
  margin-bottom: 8px;
}

#list ol {
  height: calc(100% - 60px);
  overflow: scroll;
  margin: 0;
  padding: 0;
  position: relative;
}

#list li {
	list-style: none;
  position: absolute;
	/*border: 1px solid white;*/
	border-radius: 5px;
	background: rgba(255, 255, 255, 0.5);
	padding: 8px 12px;
  transition: 0.75s;
	/*margin: 12px 0;*/
}

@media only screen and (max-width: 960px) {
  #list {
    width: 100%;
  }
  #list h2 {
    margin-top: 50px;
  }
  #map {
    width: 100%;
  }
}