/* ═══════════════════════════════════════════════════════════════════
   convenience.css — reader for THE CONVENIENCE.
   Built on surface.css's tokens (:root, universe-nav, .eyebrow, h1).
   His chapters run warm (--sim-*); Pui's interludes run cold (--arc-*) —
   the same split Two Layers uses for 2026/3026, extended here to a
   single-narrative novel with a two-voice structure.
   Mobile-first throughout. Zero rounding, zero gradient, zero shadow.
   Sidenotes use the checkbox hack: no JS, works with the page disabled.
   ═══════════════════════════════════════════════════════════════════ */

.eyebrow.small { font-size: 0.625rem; }

/* ── cover ── */
.cover-body main { padding-top: clamp(2.4rem, 8vw, 4.5rem); }
.cover .sub {
  font-family: var(--serif);
  font-style: italic;
  color: var(--soft);
  font-size: clamp(1rem, 3vw, 1.2rem);
  max-width: 34rem;
  line-height: 1.5;
  margin: 0.9rem 0 0.6rem;
}
.cover .meta {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--faint);
  text-transform: uppercase;
}
.cover .also { margin-top: 1.6rem; }
.cover .also a {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
  padding-bottom: 2px;
  display: inline-block;
  min-height: 44px;
  line-height: 44px;
}

.epigraphs {
  margin-top: clamp(2.6rem, 7vw, 4rem);
  padding: 1.6rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: grid;
  gap: 1.6rem;
}
.epigraphs blockquote { max-width: 30rem; }
.epigraphs p { font-style: italic; line-height: 1.65; margin-bottom: 0.4rem; }
.epigraphs .th p { font-family: var(--thai, var(--serif)); font-style: normal; }
.epigraphs .tr { font-family: var(--serif); }
.epigraphs cite {
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.7rem;
  color: var(--faint);
  letter-spacing: 0.03em;
}

.how-to-read {
  margin-top: clamp(2rem, 6vw, 3rem);
  max-width: 34rem;
}
.how-to-read p:not(.eyebrow) {
  color: var(--soft);
  line-height: 1.65;
  font-size: 0.95rem;
}
.mn-mark-inline {
  color: var(--amber);
  font-weight: 600;
}

/* ── table of contents ── */
.toc { margin-top: clamp(2.4rem, 7vw, 3.6rem); }
.toc h2 {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 1rem;
}
.toc-list { list-style: none; }
.toc-part {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 1.6rem 0 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}
.toc-list li:first-child .toc-part { border-top: none; padding-top: 0; margin-top: 0; }
.toc-his a, .toc-int a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  min-height: 44px;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
}
.toc-int a { color: var(--soft); font-style: italic; }
.toc-his a:hover, .toc-int a:hover { color: var(--amber); }
.toc-num {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--faint);
  white-space: nowrap;
  text-transform: uppercase;
}
.toc-title { text-align: right; flex: 1; }

/* ── chapter reader ── */
.ch-main {
  max-width: 38rem;
  margin: 0 auto;
  padding: clamp(1.6rem, 6vw, 3rem) 1.2rem 5rem;
}
body.reader.his { background: var(--sim-paper); color: var(--sim-ink); }
body.reader.interlude { background: var(--arc-paper); color: var(--arc-ink); }

.reader.his .eyebrow { color: var(--sim-faint); }
.reader.his .eyebrow b { color: var(--sim-accent); }
.reader.interlude .eyebrow { color: var(--arc-faint); }
.reader.interlude .eyebrow b { color: var(--arc-accent); }

.part-banner {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-align: center;
  padding: 2.4rem 0 1.6rem;
  color: var(--faint);
}
.part-banner .pnum { display: block; color: var(--amber); margin-bottom: 0.5rem; }
.part-banner .pname { font-size: 0.85rem; letter-spacing: 0.14em; }

.ch-head { margin: 1.6rem 0 2.2rem; }
.reader.his .ch-head h1,
.reader.interlude .ch-head h1 { font-size: clamp(1.7rem, 6vw, 2.4rem); }
.reader.interlude .ch-head h1 { font-style: italic; }
.ch-progress {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--faint);
  margin-top: 0.4rem;
}

.ch-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.ch-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--soft);
  text-decoration: none;
  padding: 0 0.3rem;
}
.reader.interlude .ch-nav a { color: var(--arc-soft); }
.ch-nav a:hover { color: var(--amber); }
.reader.interlude .ch-nav a:hover { color: var(--arc-accent); }
.ch-nav-spacer { flex: 0 0 1px; }
.ch-nav-toc { color: var(--faint); }
.ch-main > .ch-nav:last-of-type { margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--rule); }
.reader.interlude .ch-main > .ch-nav:last-of-type { border-color: var(--arc-rule); }

/* prose */
.prose { font-family: var(--serif); font-size: 1.0625rem; line-height: 1.7; }
.reader.interlude .prose { line-height: 1.68; }
.prose p {
  margin-bottom: 1.15rem;
  text-indent: 1.3em;
}
.prose p:first-of-type,
.prose hr.scene-break + p { text-indent: 0; }
.prose hr.scene-break {
  border: none;
  text-align: center;
  margin: 1.8rem 0;
  color: var(--faint);
}
.prose hr.scene-break::after { content: "·"; font-size: 1.1rem; }

/* ── sidenotes (checkbox hack: no JS) ── */
.mn-toggle {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.mn-toggle-label {
  position: relative;
  display: inline-block;
  color: var(--amber);
  font-weight: 600;
  cursor: pointer;
  padding: 0 0.15em;
  margin: 0 0.05em;
}
.reader.interlude .mn-toggle-label { color: var(--arc-accent); }
.mn-toggle-label::before {
  /* 44x44 tap target without disturbing inline text metrics */
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 44px; height: 44px;
  transform: translate(-50%, -50%);
}
.mn-toggle:focus-visible + .mn-toggle-label,
.mn-toggle-label:hover { text-decoration: underline; }

.sidenote {
  display: none;
  font-family: var(--serif);
}
.mn-toggle:checked ~ .sidenote { display: block; }
.sidenote {
  margin: 0.9rem 0 1.3rem;
  padding: 0.9rem 1rem 0.95rem;
  border-left: 2px solid var(--amber);
  background: var(--sim-paper-deep);
  font-size: 0.85rem;
  line-height: 1.55;
  text-indent: 0;
}
.reader.interlude .sidenote {
  border-left-color: var(--arc-accent);
  background: var(--arc-paper-deep);
}
.sidenote .mn-mark { display: none; }
.sidenote .mn-title {
  display: block;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sim-accent);
  margin-bottom: 0.5rem;
}
.reader.interlude .sidenote .mn-title { color: var(--arc-accent); }
.sidenote .mn-body { display: block; color: var(--sim-ink); margin-bottom: 0.55rem; }
.reader.interlude .sidenote .mn-body { color: var(--arc-ink); }
.sidenote .mn-source {
  display: block;
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--sim-faint);
  line-height: 1.5;
}
.reader.interlude .sidenote .mn-source { color: var(--arc-faint); }
.sidenote .mn-source a { color: var(--amber); text-decoration: none; border-bottom: 1px solid var(--amber); }
.reader.interlude .sidenote .mn-source a { color: var(--arc-accent); border-color: var(--arc-accent); }

/* ── tablet / desktop: sidenotes float into the margin, always open ── */
@media (min-width: 720px) {
  .ch-main { max-width: 42rem; padding-left: 2rem; padding-right: 2rem; }
  .prose { font-size: 1.09rem; }
}

@media (min-width: 1100px) {
  .ch-main { max-width: 68rem; margin: 0 auto; padding-left: 2rem; padding-right: 2rem; }
  .part-banner, .ch-head, .ch-nav, .universe-nav { max-width: 40rem; }
  .prose { max-width: 40rem; }
  .toc, .epigraphs, .how-to-read { max-width: 40rem; }

  .mn-toggle-label { pointer-events: none; }
  .sidenote {
    display: block !important;
    float: right;
    clear: right;
    width: 18.5rem;
    margin: 0.1rem -22.5rem 1rem 0;
    padding: 0.85rem 1rem;
    font-size: 0.8rem;
  }
}