Comic callout sections

<div class="callout callout-info">Additional information that you may want to know.</div>
<div class="callout callout-warning">Warn about something happening if you do this.</div>
<div class="callout callout-error">Something bad will happen if you do this.</div>

@font-face {
  font-family: "Playpen Sans";
  font-weight: 500;
  src: url("PlaypenSans-Medium.woff2");
}

body {
  min-height: 100dvh;
  margin: 0;

  background: hsl(214, 40%, 70%);

  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
}

/* The default callout style is "information" with green colours. */
.callout {
  --bg-color: hsl(130, 80%, 64%);
  --dot-color: hsl(130, 80%, 48%);
  --border-color: hsl(130, 80%, 34%);

  --dot-size: 0.05rem;
  --dot-density: 0.5rem;
  --dot-positioning: 0 0, 0.25rem 0.25rem;

  width: 80%;
  max-width: 600px;
  padding: 0.75rem 0.5rem;

  position: relative;

  font-family: "Playpen Sans", cursive;
  font-weight: 500;

  font-size: 1.25rem;

  color: hsl(279, 100%, 10%);

  background-color: var(--bg-color);

  background-image: radial-gradient(
      var(--dot-color) var(--dot-size),
      transparent var(--dot-size)
    ),
    radial-gradient(var(--dot-color) var(--dot-size), transparent var(--dot-size));
  background-size: var(--dot-density) var(--dot-density);
  background-position: var(--dot-positioning);

  border: 1px solid var(--border-color);
}

.callout-warning {
  --bg-color: hsl(35, 100%, 64%);
  --dot-color: hsl(35, 100%, 48%);
  --border-color: hsl(35, 100%, 34%);
}

.callout-error {
  --bg-color: hsl(6, 100%, 64%);
  --dot-color: hsl(6, 100%, 48%);
  --border-color: hsl(6, 100%, 34%);
}

/* This adds a label to indicate the type of callout. It is visually hidden but here to improve accessibility */
.callout::before {
  content: "information";

  display: block;

  /* hidden. Here to make accessibile. */
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;

  white-space: nowrap;
  clip-path: inset(100%);
  clip: rect(0 0 0 0);
  overflow: hidden;
}

.callout-warning::before {
  content: "warning";
}

.callout-error::before {
  content: "error";
}

/* This is a darker, offset version of the main element that acts as type of box-shadow. This is
used over `box-shadow` because I want this element to have a stipled background also */
.callout::after {
  content: "";

  --bg-color: hsl(42, 5%, 10%);
  --dot-color: hsl(42, 5%, 17%);
  --dot-size: 0.05rem;
  --dot-density: 0.5rem;
  --dot-positioning: 0 0, 0.25rem 0.25rem;

  display: block;
  width: calc(100% + 0.5rem);
  height: calc(100% + 0.5rem);

  position: absolute;
  top: 0.25rem;
  left: 0.25rem;

  background-color: var(--bg-color);

  background-image: radial-gradient(
      var(--dot-color) var(--dot-size),
      transparent var(--dot-size)
    ),
    radial-gradient(var(--dot-color) var(--dot-size), transparent var(--dot-size));
  background-size: var(--dot-density) var(--dot-density);
  background-position: var(--dot-positioning);

  z-index: -1;
}