Template:Protractor-LLB/styles.css

.protractor {
  /*
  aspect-ratio: 1 / 1;
  min-width: 150px; /* minimum that this is still okay to look at (should apply to parent too, but parent will scroll instead)
  */
  width: 300px;
  height: 300px; 
  border: 3px solid;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: clip;
}

/* --- Ball --- */
.ball {
  z-index: 2;
  border-radius: 50%;
}

/* --- Guidelines --- */
.guide-line {
  font-size: 1px;
  z-index: 0;
  height: 0;
  width: 100%;
  position: absolute;
  left: 1px;
  border: 1em dotted;
  border-width: 1em 0;
  opacity: 0.75;
  transform-origin: 50% 0;
}

.guide-thin {
  opacity: 0.35;
}

/* --- Angles --- */
.angle {
  z-index: 1;
  display: block;
  width: 50%;
  height: 1em;
  position: absolute;
  left: 50%;
  transform-origin: 0 50%;
  border: .2em solid;
  border-left: 0;
  border-right: 0;
}

.bounce::after {
  z-index: 2;
  content: "";
  box-sizing: border-box;
  border: 1px solid;
  position: absolute;
  height: calc(1em + .2em * 2);
  width: calc(1em + 2px);
  right: 0;
  top: -.2em;
}

/* --- Colors --- */
.protractor {
  border-color: #666;
  background-color: #fafafa;
}
.guideline {
  border-color: #666;
}
.angle {
	border-color: #000;
}
.bounce::after {
  background-color: #fafafa;
  border-color: #0cf;
}

/*
@media (prefers-color-scheme: dark) {
	.protractor {
	  border-color: #444;
	  background-color: #222;
	}
	.guideline {
	  border-color: #444;
	}
	.angle {
		border-color: #fff;
	}
	.bounce::after {
	  background-color: #222;
	}
}
*/