html,
body {
  height: 100%;
  overflow: hidden;
}

.exp-bar {
  position: absolute;
  inset: 0 0 auto;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  padding: var(--space-medium) var(--space-large);
  font-family: var(--font-mono);
  font-size: var(--size-xs);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.exp-bar a {
  color: inherit;
  text-decoration: none;
}

.hint {
  position: absolute;
  left: var(--space-large);
  top: 3.4rem;
  z-index: 2;
  margin: 0;
  max-width: 22rem;
  color: var(--color-text-muted);
  font-size: var(--size-sm);
}

.viewport {
  position: absolute;
  inset: 0;
  cursor: grab;
  overflow: hidden;
}

.viewport.is-dragging {
  cursor: grabbing;
}

.world {
  width: 1600px;
  height: 1100px;
  position: relative;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48'%3E%3Cpath d='M48 0H0v48' fill='none' stroke='%23d0c6b4' stroke-width='1'/%3E%3C/svg%3E");
}

.cluster {
  position: absolute;
  width: 16rem;
}

.cluster h2 {
  font-family: var(--font-display);
  font-size: var(--size-lg);
  font-weight: var(--weight-medium);
  margin: 0 0 var(--space-small);
  border-bottom: var(--border-width) solid var(--color-text);
  padding-bottom: var(--space-small);
}

.cluster article {
  padding: var(--space-small) 0;
  cursor: pointer;
  color: var(--color-text-muted);
}

.cluster article:hover,
.cluster article.is-on {
  color: var(--color-text);
}

.reader {
  position: absolute;
  right: var(--space-large);
  bottom: var(--space-large);
  width: min(22rem, calc(100% - 2rem));
  background: var(--color-bg-elevated);
  border: var(--border-width) solid var(--color-border);
  padding: var(--space-medium);
  z-index: 2;
}

.reader[hidden] {
  display: none;
}

.reader p {
  margin: 0 0 var(--space-medium);
}

.reader button {
  appearance: none;
  background: none;
  border: 0;
  border-bottom: var(--border-width) solid var(--color-border);
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--size-xs);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: inherit;
  cursor: pointer;
}