style.css

canvas {
	padding: 0;
	margin: auto;
	outline: none;
	display: block;
	top:0;
	bottom: 0;
	left: 0;
	right: 0;
  position: absolute;
  width: 100%;
}
@media (min-aspect-ratio: 2/1) {
  canvas {
    width: unset;
    height: 100%;
  }
}
input {
	background: white;
}
textarea {
	background: white;
	resize: none;
}
* { -webkit-tap-highlight-color:rgba(0,0,0,0); }

.custom-select {
  position: relative;
  font-family: Arial, sans-serif;
}

.custom-select select {
  display: none; /*hide original SELECT element:*/
}

/*style the items (options), including the selected item:*/
.select-items div,.select-selected {
  color: black;
  padding: 0.2em;
  cursor: pointer;
  user-select: none;
}

/*style items (options):*/
.select-items {
  position: absolute;
  background-color: white;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 99;
}

/*hide the items when the select box is closed:*/
.select-hide {
  display: none;
}

.select-items div:hover, .same-as-selected {
  background-color: cyan;
}

input[type=text]:invalid {
  background-color: #fbb;
  box-shadow: 0 0 3px 2px #c22;
}