/* ==========================================================================
   The Lost Books of the Bible, Restored Apocrypha Edition.
   Chaptered editorial grammar on a light canvas.
   Engine files are never edited. Everything here is page markup plus tokens.
   ========================================================================== */

:root {
  /* Light canvas inversions. Warm cream paper, near black ink, one gold. */
  --sc-canvas:      #F4EEE1;
  --sc-surface:     #EFE7D6;
  --sc-ink:         #17130D;
  --sc-ink-soft:    #59503F;
  --sc-accent:      #8A6A1F;
  --sc-accent-ink:  #F4EEE1;

  --sc-font-display: "Cormorant Garamond", Georgia, serif;
  --sc-font-text:    "EB Garamond", Georgia, serif;

  /* Shadow tinted to the paper, not to a blue night. Light grounds need less. */
  --sc-shadow-color: 32 30% 16%;

  --sc-measure: 58ch;

  /* Page grounds. Hard cuts, never a drift between them. */
  --lb-paper:   #F4EEE1;
  --lb-deep:    #EDE4D1;
  --lb-warm:    #F1E7D2;
  --lb-close:   #E7DCC5;
  --lb-slate:   #23262B;

  --lb-rail: 15rem;
}

html { background: var(--lb-paper); }

body {
  background: var(--lb-paper);
  font-size: clamp(1.02rem, 0.98rem + 0.22vw, 1.16rem);
}

::selection { background: #DCCDA5; color: #17130D; }

:focus-visible {
  outline: 2px solid var(--sc-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------------------------------------------------------------- folio -- */

.folio {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--lb-rail);
  height: 100vh;
  padding: var(--sc-6) var(--sc-4) var(--sc-5) var(--sc-5);
  display: flex;
  flex-direction: column;
  gap: var(--sc-5);
  overflow-y: auto;
  z-index: 60;
  font-family: var(--sc-font-text);
  font-size: 0.82rem;
  line-height: 1.45;
  background: var(--lb-paper);
  border-right: 1px solid color-mix(in oklab, #17130D 12%, transparent);
}

.folio__imprint {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}

.folio__list,
.idx {
  list-style: none;
  margin: 0;
  padding: 0;
}

.folio__list { display: flex; flex-direction: column; gap: 0.15rem; }

.folio__link {
  display: flex;
  gap: 0.55rem;
  align-items: baseline;
  padding: 0.2rem 0;
  color: var(--sc-ink-soft);
  text-decoration: none;
  transition: color var(--sc-d-base) var(--sc-ease-out);
}

.folio__link:hover { color: var(--sc-ink); }

.folio__num {
  min-width: 1.9em;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.1em;
  font-size: 0.72rem;
  text-transform: uppercase;
  color: color-mix(in oklab, #17130D 45%, transparent);
}

.folio__link.is-current { color: var(--sc-ink); }
.folio__link.is-current .folio__num { color: var(--sc-accent); }
.folio__link.is-current .folio__name { box-shadow: 0 1px 0 var(--sc-accent); }

/* The folio is empty on the title page. */
.folio.is-blank .folio__list,
.folio.is-blank .idx-block { opacity: 0; visibility: hidden; }
.folio__list, .idx-block { transition: opacity 420ms var(--sc-ease-out); }

/* The index block only appears once the reader has passed a name. */
.idx-block { margin-top: auto; opacity: 0; visibility: hidden; }
.folio.has-names .idx-block { opacity: 1; visibility: visible; }

.idx__head {
  margin: 0 0 var(--sc-3);
  padding-top: var(--sc-3);
  border-top: 1px solid var(--sc-accent);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}

.idx__item {
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 620ms var(--sc-ease-out), transform 620ms var(--sc-ease-out);
  color: var(--sc-ink);
  font-size: 0.8rem;
  line-height: 1.55;
}

.idx__item.is-on { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .idx__item { transform: none; transition-duration: 200ms; }
}

/* ----------------------------------------------------------------- page -- */

.page { margin-left: var(--lb-rail); }

.chap {
  position: relative;
  padding: var(--sc-section) var(--sc-gutter);
  background: var(--lb-paper);
  color: var(--sc-ink);
}

.chap--deep  { background: var(--lb-deep); }
.chap--warm  { background: var(--lb-warm); }
.chap--close { background: var(--lb-close); }

.chap--dark {
  background: var(--lb-slate);
  --sc-ink:      #EFE9DC;
  --sc-ink-soft: #A9A08B;
  --sc-accent:   #C6A458;
  color: var(--sc-ink);
}

.wrap { max-width: 66rem; margin: 0 auto; }

/* ----------------------------------------------------------- title page -- */

.title-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--sc-9);
  padding-bottom: var(--sc-9);
}

.title-page__inner { max-width: 46rem; }

.imprint {
  margin: 0 0 var(--sc-8);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}

.title {
  margin: 0;
  font-family: var(--sc-font-display);
  font-weight: 400;
  font-size: clamp(2.6rem, 1.6rem + 3.4vw, 4.6rem);
  line-height: 1.0;
  letter-spacing: var(--sc-track-snug);
  text-wrap: balance;
}

.title__sub {
  display: block;
  margin-top: 0.3em;
  font-size: 0.42em;
  font-style: italic;
  letter-spacing: 0.02em;
  color: var(--sc-ink-soft);
}

.title-page__line {
  margin: var(--sc-6) 0 0;
  max-width: 34rem;
  color: var(--sc-ink-soft);
  text-wrap: pretty;
}

.rule {
  height: 1px;
  margin: var(--sc-7) 0 var(--sc-4);
  background: var(--sc-accent);
  opacity: 0.75;
  border: 0;
}

.edition {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}

/* -------------------------------------------------------------- chapter -- */

.chap__head { margin: 0 0 var(--sc-7); }

.chap__num {
  display: block;
  margin-bottom: var(--sc-3);
  font-family: var(--sc-font-text);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
}

.chap__title {
  margin: 0;
  font-family: var(--sc-font-display);
  font-weight: 400;
  font-size: clamp(1.9rem, 1.3rem + 1.8vw, 3rem);
  line-height: 1.06;
  letter-spacing: var(--sc-track-snug);
  text-wrap: balance;
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1fr);
  gap: var(--sc-7) var(--sc-8);
  align-items: start;
}

.grid--text-first { grid-template-columns: minmax(0, 1fr) minmax(0, 0.88fr); }
.grid--text-first .col--media { order: 2; }
.grid--text-first .col--text  { order: 1; }

.col--text > p {
  margin: 0 0 var(--sc-5);
  max-width: var(--sc-measure);
  text-wrap: pretty;
}

.col--text > p:last-child { margin-bottom: 0; }

.lede { font-size: 1.1em; }

.num {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

/* ---------------------------------------------------------------- media -- */

.col--media { display: flex; flex-direction: column; gap: var(--sc-6); }

.plate { margin: 0; }

.plate__frame {
  overflow: hidden;
  background: color-mix(in oklab, #17130D 6%, transparent);
  box-shadow: 0 1px 2px hsl(var(--sc-shadow-color) / 0.18),
              0 10px 24px -12px hsl(var(--sc-shadow-color) / 0.30);
}

.plate img { width: 100%; height: auto; }

.plate figcaption {
  margin-top: var(--sc-3);
  padding-top: var(--sc-3);
  border-top: 1px solid var(--sc-accent);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--sc-ink-soft);
}

.plate figcaption b {
  display: block;
  font-weight: 600;
  color: var(--sc-ink);
}

/* ---------------------------------------------------------------- specs -- */

.specs { margin: 0; }

.specs div {
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--sc-4);
  justify-content: space-between;
  padding: var(--sc-3) 0;
  border-bottom: 1px solid color-mix(in oklab, #17130D 14%, transparent);
}

.specs div:first-child { border-top: 1px solid var(--sc-accent); }

.specs dt {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sc-ink-soft);
  padding-top: 0.25em;
}

.specs dd {
  margin: 0;
  text-align: right;
  flex: 1 1 14rem;
}

/* ------------------------------------------------------------------ faq -- */

.faq { margin-top: var(--sc-8); }

.faq__head {
  margin: 0 0 var(--sc-4);
  font-family: var(--sc-font-display);
  font-weight: 400;
  font-size: 1.6rem;
  line-height: 1.1;
}

.faq details {
  border-top: 1px solid color-mix(in oklab, #17130D 14%, transparent);
}

.faq details:last-of-type {
  border-bottom: 1px solid color-mix(in oklab, #17130D 14%, transparent);
}

.faq summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: var(--sc-4) var(--sc-6) var(--sc-4) 0;
  font-family: var(--sc-font-display);
  font-size: 1.22rem;
  line-height: 1.25;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "";
  position: absolute;
  right: 0.35rem;
  top: 1.55em;
  width: 11px;
  height: 1px;
  background: var(--sc-accent);
  box-shadow: 0 0 0 0 transparent;
}

.faq summary::before {
  content: "";
  position: absolute;
  right: 0.35rem;
  top: 1.55em;
  width: 11px;
  height: 1px;
  background: var(--sc-accent);
  transform: rotate(90deg);
  transition: transform var(--sc-d-base) var(--sc-ease-out);
}

.faq details[open] summary::before { transform: rotate(0deg); }

.faq p {
  margin: 0 0 var(--sc-4);
  max-width: var(--sc-measure);
  color: var(--sc-ink-soft);
  text-wrap: pretty;
}

/* ------------------------------------------------------------- colophon -- */

.colophon .wrap { max-width: 66rem; }

.colo__facts { margin: 0 0 var(--sc-6); }

.colo__facts p {
  margin: 0 0 var(--sc-2);
  font-size: 0.92rem;
  color: var(--sc-ink-soft);
}

.ask {
  margin: 0 0 var(--sc-4);
  font-family: var(--sc-font-display);
  font-size: clamp(1.15rem, 1rem + 0.5vw, 1.5rem);
  line-height: 1.5;
  max-width: 34ch;
}

.ask a {
  color: var(--sc-ink);
  text-decoration: underline;
  text-decoration-color: var(--sc-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 7px;
  transition: text-underline-offset var(--sc-d-base) var(--sc-ease-out);
}

.ask a:hover { text-underline-offset: 4px; }

.fine {
  margin: 0 0 var(--sc-2);
  font-size: 0.88rem;
  color: var(--sc-ink-soft);
  max-width: 44ch;
}

.fine a { color: var(--sc-ink); text-decoration-color: var(--sc-accent); }

.masthead {
  margin-top: var(--sc-8);
  padding-top: var(--sc-5);
  border-top: 1px solid var(--sc-accent);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--sc-ink-soft);
}

.masthead p { margin: 0 0 var(--sc-2); }
.masthead b { color: var(--sc-ink); font-weight: 600; letter-spacing: 0.04em; }
.masthead__links a {
  margin-right: var(--sc-4); color: var(--sc-ink-soft);
  display: inline-block; padding: 13px 6px; margin: -13px calc(var(--sc-4) - 6px) -13px -6px;
}
.masthead a { text-decoration-color: color-mix(in oklab, #17130D 30%, transparent); }

/* --------------------------------------------------------------- mobile -- */

@media (max-width: 1060px) {
  .folio {
    position: sticky;
    top: 0;
    left: auto;
    width: auto;
    height: auto;
    max-height: none;
    overflow: visible;
    flex-direction: column;
    gap: var(--sc-2);
    padding: var(--sc-3) var(--sc-gutter);
    border-right: 0;
    border-bottom: 1px solid color-mix(in oklab, #17130D 14%, transparent);
  }

  .folio__imprint { display: none; }

  .folio__list { flex-direction: row; flex-wrap: wrap; gap: 0 0.7rem; }

  /* The rail collapses to a strip here and the numbers alone were a 22x17
     target. Padding cancelled by an equal negative margin: the tap target
     clears 44px without moving anything on the page. */
  .folio__link { padding: 14px 11px; margin: -14px -11px; gap: 0.35rem; }

  .folio__name { display: none; }
  .folio__link.is-current .folio__name { display: inline; }

  .idx-block { margin-top: 0; }
  .idx__head { display: none; }

  .idx {
    display: flex;
    flex-wrap: wrap;
    gap: 0 0.55rem;
    max-height: 3.2em;
    overflow: hidden;
  }

  .idx__item { font-size: 0.74rem; }
  .idx__item::after { content: ","; color: color-mix(in oklab, #17130D 35%, transparent); }
  .idx__item:last-child::after { content: ""; }

  .chap--dark .idx__item::after { color: color-mix(in oklab, #EFE9DC 35%, transparent); }

  .page { margin-left: 0; }

  .grid,
  .grid--text-first { grid-template-columns: minmax(0, 1fr); }

  .grid--text-first .col--media,
  .col--media { order: 1; }

  .grid--text-first .col--text,
  .col--text { order: 2; }

  .title-page { min-height: 88vh; }
}

@media (max-width: 560px) {
  .specs div { justify-content: flex-start; }
  .specs dd { text-align: left; flex: 1 1 100%; }
}