html, body {
  height: calc(100% - 10%);
  margin: 2%;
}

h1 {
  opacity: 1;
  font-size: 100%;
}

h5 {
  opacity: 0.75;
}

#inputForm {
  height: 100%
}

.cy {
  border: solid;
  border-width: 0.5;
  height: 100%;
}

.cy-container {
  height: 100%;
}

.btn-div{
    padding-top:5px;
    padding-bottom:5px;

}

html, body {
  height: calc(100% - 10%);
  margin: 2%;
}

h1 {
  opacity: 1;
  font-size: 100%;
}

h5 {
  opacity: 0.75;
}

#inputForm {
  height: 100%
}

.cy {
  border: solid;
  border-width: 0.5;
  height: 100%;
}

.cy-container {
  height: 100%;
}

.btn-div{
    padding-top:5px;
    padding-bottom:5px;

}

body .modal-dialog {
    /* new custom width */
    width: 80%;
}

Make modal a bit narrower
Make modal a bit narrower

- 80% of screen defined in css
