#map {
  width: 100%;
  min-height: 400px;
  margin:0;
  padding:0;
}

.markers-str1-group > div::after { content: '¹';}
.markers-str2-group > div::after { content: '²';}
.markers-str3-group > div::after { content: '³';}
.markers-str4-group > div::after { content: '⁴';}