/* Reading typography and highlights are scoped to the immersive reader. */
.immersive-reader {
  --highlight-rgb: 197, 180, 244;
  --highlight-opacity: .7;
  --immersive-size: 21px;
  --immersive-line-height: 1.85;
  --immersive-ink: var(--text, #eaece9);
  width: min(100%, 900px);
  min-height: 180px;
  height: min(60dvh, 690px);
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--line, #39413e) transparent;
  border: 1px solid var(--line, #343c38);
  border-radius: 20px;
  background: var(--surface, #171b18);
  color: var(--immersive-ink);
  padding: clamp(24px, 4vw, 48px) clamp(22px, 5vw, 64px);
  outline: none;
  cursor: text;
  user-select: text;
  -webkit-user-select: text;
  -webkit-overflow-scrolling: touch;
  scroll-padding-block: 30%;
  contain: layout style;
}
.immersive-reader[hidden] { display: none; }
.immersive-reader:focus-visible { outline: 2px solid var(--accent, #2ec4b6); outline-offset: 4px; }
.immersive-content {
  max-width: 68ch;
  margin: 0 auto;
  font-family: var(--word-font, var(--font-serif, Georgia, serif));
  font-size: var(--immersive-size);
  font-weight: 400;
  line-height: var(--immersive-line-height);
  letter-spacing: .004em;
  overflow-wrap: anywhere;
  text-align: start;
  text-rendering: optimizeLegibility;
}
.immersive-paragraph {
  margin: 0 0 1.3em;
  white-space: pre-wrap;
  /* Offscreen paragraphs avoid unnecessary layout and painting on long books. */
  content-visibility: auto;
  contain-intrinsic-size: auto 150px;
}
.immersive-paragraph:last-child { margin-bottom: 0; }
.immersive-paragraph.is-current { content-visibility: visible; }
.immersive-continuation { margin-bottom: .65em; }
.immersive-sentence {
  background: rgba(var(--highlight-rgb), calc(var(--highlight-opacity) * .075));
  border-radius: 3px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.immersive-word {
  color: inherit;
  background: rgba(var(--highlight-rgb), var(--highlight-opacity));
  border-radius: 3px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
/* Ink changes only for solid fills; half markers and underlines keep the
   document's text color, including in dark mode. */
.immersive-reader[data-highlight-style='full'] .immersive-word,
.immersive-reader[data-highlight-style='pill'] .immersive-word {
  color: #202821;
  background: rgba(var(--highlight-rgb), max(var(--highlight-opacity), .5));
}
.immersive-reader[data-highlight-style='full'] .immersive-word { border-radius: 3px; }
.immersive-reader[data-highlight-style='half'] .immersive-word {
  background: linear-gradient(to bottom, transparent 53%, rgba(var(--highlight-rgb), var(--highlight-opacity)) 53%, rgba(var(--highlight-rgb), var(--highlight-opacity)) 91%, transparent 91%);
  border-radius: 0;
}
.immersive-reader[data-highlight-style='underline'] .immersive-word {
  background: none;
  text-decoration-line: underline;
  text-decoration-color: rgba(var(--highlight-rgb), var(--highlight-opacity));
  text-decoration-thickness: .14em;
  text-underline-offset: .2em;
  text-decoration-skip-ink: none;
  border-radius: 0;
}
.immersive-reader[data-highlight-style='pill'] .immersive-word {
  border-radius: .7em;
  /* An inset shadow gives the pill a little room without moving word layout. */
  box-shadow: .12em 0 0 rgba(var(--highlight-rgb), max(var(--highlight-opacity), .5)), -.12em 0 0 rgba(var(--highlight-rgb), max(var(--highlight-opacity), .5));
}
.immersive-content ::selection { background: rgba(var(--highlight-rgb), .45); color: inherit; }
@media (max-width: 600px) {
  .immersive-reader { border-radius: 14px; height: 55dvh; padding: 23px 21px; }
  .immersive-content { letter-spacing: 0; }
}
@media (max-height: 550px) and (orientation: landscape) {
  .immersive-reader { height: 45dvh; min-height: 120px; padding-block: 16px; }
}
@media (forced-colors: active) {
  .immersive-sentence { background: none; }
  .immersive-reader[data-highlight-style] .immersive-word { outline: 2px solid Highlight; background: Highlight; color: HighlightText; }
}