input[type="checkbox"] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  /* Styling checkbox */
  position: relative;width: 10px;
height: 10px;
  top: 0px;

  background-color: white;
  border-style: solid;
  border-width: thin;
  border-radius: 20%;
 }

input[type="checkbox"]:checked {
  background-color: grey;
  content: "\2714";
  font-weight: bold;
  background-color:#f26721;
}

    .d3-tip {
      background: white; 
        border: 1px;    
        border-radius: 8px;
        box-shadow:0px 5px 15px 0px rgba(0,0,0,0.3);      
    }

    legend {
      font-weight: bold;
    }

    label {
      font-weight: bold;
    }