index.css

#mapid {  height: 600px;
          margin: 2px;
          z-index: 1;
        }

#tooltip {
        z-index: 2;
        position: absolute;
        width: 275px;
        padding: 10px;
        background-color: white;
        border-radius: 10px;
        box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.4);
        opacity: 0.8;
}

#tooltip.hidden {
        display: none;
}

#tooltip p {
        margin: 0;
        font-family: sans-serif;
        font-size: 12px;
        line-height: 14px;
}

.legend {
          text-align: left;
          line-height: 28px;
          font-size: 105%;
          height: 98px;
      }

.icon {
      display: inline-block;
}

.info {
    padding: 8px 8px;
    background: white;
    background: rgba(255,255,255,1);
    box-shadow: 0 0 15px rgba(0,0,0,0.2);
    border-radius: 5px;
}

.magnitude {
  margin-left: 35px;
}

.info h4 {
    margin: 0 0 5px;
    color: #777;
}

.legend i {
    margin-top: 8px;
    width: 12px;
    height: 12px;
    float: left;
    margin-right: 8px;
    opacity: 1;
    border-radius: 50%;
    display: inline-block;
    margin-left: 50px;
  }

.legend iq {
    margin-top: 8px;
    width: 12px;
    height: 12px;
    float: left;
    margin-right: 8px;
    opacity: 1;
    border-radius: 50%;
    display: inline-block;
    margin-left: 45px;
  }

.legend is {
    margin-top: 8px;
    width: 15px;
    height: 15px;
    float: left;
    margin-right: 8px;
    opacity: 1;
    border-radius: 50%;
    margin-left: 45px;
}