.signature-pad-overlay {
  position: fixed; /* Sit on top of the page content */
  display: none; /* Hidden by default */
  width: 100%; /* Full width (cover the whole page) */
  height: 100%; /* Full height (cover the whole page) */
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0,0,0,0.5); /* Black background with opacity */
  z-index: 2; /* Specify a stack order in case you're using a different order for other elements */
  cursor: pointer; /* Add a pointer on hover */
}

.signature-pad {

  position: absolute;
  top: 50%;
  left: 50%;
  font-size: 50px;
  color: white;
  transform: translate(-50%,-50%);
  -ms-transform: translate(-50%,-50%);

  font-size: 10px;
  width: 100%;
  height: 100%;
  max-width: 700px;
  max-height: 460px;
  border: 1px solid #e8e8e8;
  background-color: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.27), 0 0 40px rgba(0, 0, 0, 0.08) inset;
  border-radius: 4px;
  padding: 16px;
}

.signature-pad--body {
  position: relative;
  -webkit-box-flex: 1;
      -ms-flex: 1;
          flex: 1;
  border: 1px solid #f4f4f4;
}

.signature-pad--body
canvas {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  border-radius: 4px;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.02) inset;
}

.signature-pad--footer {
  color: #C3C3C3;
  text-align: center;
  font-size: 1.2em;
  margin-top: 8px;
}

.signature-pad--actions {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  margin-top: 8px;
}