html, body {
  margin: 0;
  padding: 0;
}
body {
  display: flex;
}
main {
  order: 2;
}
canvas { display:block;}

.controls {
    order: 1;
  margin-top: 0;
  display: grid;
  gap: 10px;
  border: 1px solid #000000;
  padding: 1em;
  font-family: Helvetica, sans-serif;
  width: 400px;
  height: calc(100vh - 2em);
}
.controls button {
  appearance: none;
  border: 0px;
  color: white;
  background: black;
  padding: 1em;
}
.controls button:hover {
  background:#ec6602;
  cursor:pointer;
}
.controls > div {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}