style.css

html, body {
  margin: 0;
  padding: 0;
  
}
canvas {
  padding-left: 0;
  padding-right: 0;
 margin-top: auto;
  margin-left: auto;
  margin-right: auto;
 margin-bottom: auto;
  display: block;
  width: 800px;
}

.myButton {
  font-size: 20px;

  width: 40px;
  height: 40px;
  text-align: center;
  background-color: #000000;
  border-style: none;
  cursor: pointer;
  transition-duration: 0.3s;
  color: #ffffff;
  /* border-radius: 100%; */
/*   padding: 20px, 25px; */
 
}

.myButton:hover {
  transition-duration: 0.5s;
  background-color: #ffffff;
  color: #020202 ;
  border: 2px solid black;
}

.saveButton{
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  width: 150px;
  height: 45px;
  border-style: none;
  background-color: #040404;
  color: #ffffff;
  font-size: 16px;
  cursor: pointer;
}

.saveButton:hover {
  transition-duration: 0.5s;
  background-color: #ffffff;
  color: #020202 ;
  border: 2px solid black;
}

.dropdown{
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  width: 150px;
  height: 45px;
  border: 2px solid black;
  font-size: 16px;
}

.Instruction{
  font-family: 'Helvetica', sans-serif;
  font-size: 16px;
  color: rgb(7, 7, 7);
  border-style: none;
  background-color: #ffffff;
}

.sizeSlider{
  width: 150px;
  height: 2px;
  background-color: #000000;
  
  /* Removes some defaults */
  -webkit-appearance: none;
}

.sizeSlider:hover {
  opacity: 0.7; /* Fully shown on mouse-over */
}

.sizeSlider::-webkit-slider-thumb {
  width: 20px;
  height: 20px;
  background: #000000;
  cursor: pointer;
  -webkit-appearance: none;
  
  /* negative top padding moves it up */
  margin-top: 0px;

  
  /* Border radius gives rounded corners, if they're big enough, you end up with circles */
  border-radius: 50%;
  
}

.myRadio{
  height: 35px;
  padding-top:8px;
  padding-left: 10px;
  padding-right: 10px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  border: 2px solid black;
}