styles.css

/* The Modal (background) */
.modal {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: rgb(0,0,0);
  background-color: rgba(0,0,0,0.4);
}

/* Modal Content/Box */
.modal-content {
  background-color: #fefefe;
  margin: 15% auto; /* 15% from the top and centered */
  padding: 20px;
  border: 1px solid #888;
  width: 80%; /* Could be more or less, depending on screen size */
}

/* Modal Header */
.modal-header {
  padding: 2px 16px;
  background-color: #5cb85c;
  color: white;
}

/* Modal Body */
.modal-body {padding: 2px 16px;}

/* / Modal Footer / */
.modal-footer {
  padding: 2px 16px;
  background-color: #5cb85c;
  color: white;
}

img.a {
  vertical-align: baseline;
}

img.b {
  vertical-align: text-top;
}

img.c {
  vertical-align: text-bottom;
}
/* The Close Button */
.close,
.close1 {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}

/* / Modal Content / */
.modal-content {
  position: relative;
  background-color: #fefefe;
  margin: fixed;
  padding: 10;
  border: 1px solid #888;
  width: 400px;
  box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
  animation-name: animatetop;
  animation-duration: 0.4s
}

/* / Add Animation */
@keyframes animatetop {
  from {top: -300px; opacity: 0}
  to {top: 0; opacity: 1}
}

#legend {
  background: #fff;
  padding: 10px;
  margin: 10px;
  border: 1px solid #888;
}

#legend h3 {
  margin-top: 0;
}

#legend img {
  vertical-align: middle;
}