/* ============================================================
   CHRONOFALL — 07 / CODEX — The Horologists' Archive
   Ledger / manuscript meets neon. Mobile-first (360px+).
   ============================================================ */

.codex .section__sub {
  font-style: italic;
}

.codex__list {
  border-top: 1px solid rgba(168, 85, 247, .28);
}

/* ---------- Entry ---------- */
.codex-entry {
  position: relative;
  border-bottom: 1px solid rgba(168, 85, 247, .28);
  transition: background .45s, box-shadow .45s;
}

/* Left rule — a hairline that ignites on the open entry */
.codex-entry::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--pink), var(--purple), var(--purple-deep));
  box-shadow: 0 0 14px var(--purple), 0 0 34px rgba(168, 85, 247, .6);
  opacity: 0;
  transform: scaleY(.4);
  transform-origin: top;
  transition: opacity .45s, transform .55s cubic-bezier(.4, 0, .2, 1);
}
.codex-entry.is-open::before {
  opacity: 1;
  transform: scaleY(1);
}
.codex-entry.is-open {
  background: linear-gradient(90deg, rgba(168, 85, 247, .09), rgba(168, 85, 247, .02) 60%, transparent);
  box-shadow:
    inset 0 0 46px rgba(168, 85, 247, .08),
    0 0 28px rgba(168, 85, 247, .14);
}

/* ---------- Header button ---------- */
.codex-entry__heading { margin: 0; }

.codex-entry__btn {
  display: grid;
  grid-template-columns: 2.2rem 1fr 1.2rem;
  grid-template-areas:
    'num title chev'
    'num ref   chev';
  column-gap: .8rem;
  align-items: center;
  width: 100%;
  min-height: 56px;                 /* comfortable touch target */
  padding: 1.05rem .85rem 1.05rem .95rem;
  background: none;
  border: 0;
  text-align: left;
  color: var(--text);
  font-family: var(--font-body);
  -webkit-tap-highlight-color: transparent;
  transition: padding-left .35s;
}
.codex-entry.is-open .codex-entry__btn { padding-left: 1.15rem; }

.codex-entry__num {
  grid-area: num;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--purple);
  text-shadow: 0 0 12px rgba(168, 85, 247, .55);
}
.codex-entry.is-open .codex-entry__num {
  color: var(--pink);
  text-shadow: 0 0 14px rgba(240, 171, 252, .8);
}

.codex-entry__title {
  grid-area: title;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .74rem;
  line-height: 1.45;
  letter-spacing: .14em;
  text-transform: uppercase;
  transition: color .3s, text-shadow .3s;
}
.codex-entry__btn:hover .codex-entry__title,
.codex-entry__btn:focus-visible .codex-entry__title {
  color: var(--pink);
  text-shadow: 0 0 14px rgba(168, 85, 247, .8);
}
.codex-entry.is-open .codex-entry__title {
  color: var(--purple-soft);
  text-shadow: 0 0 18px rgba(168, 85, 247, .9);
}

.codex-entry__ref {
  grid-area: ref;
  margin-top: .35rem;
  font-size: .56rem;
  letter-spacing: .32em;
  color: var(--text-dim);
  opacity: .55;
}

/* Chevron ornament — rotates on open */
.codex-entry__chevron {
  grid-area: chev;
  justify-self: end;
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--purple-soft);
  border-bottom: 1px solid var(--purple-soft);
  transform: rotate(45deg);          /* points down */
  transition: transform .45s cubic-bezier(.4, 0, .2, 1), filter .3s;
  filter: drop-shadow(0 0 5px rgba(168, 85, 247, .7));
}
.codex-entry.is-open .codex-entry__chevron {
  transform: rotate(225deg);         /* points up */
  border-color: var(--pink);
  filter: drop-shadow(0 0 8px rgba(240, 171, 252, .9));
}

.codex-entry__btn:focus-visible {
  outline: 1px solid var(--purple);
  outline-offset: -1px;
  box-shadow: inset 0 0 22px rgba(168, 85, 247, .2);
}

/* ---------- Collapsible panel (grid-rows trick) ---------- */
.codex-entry__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .55s cubic-bezier(.4, 0, .2, 1);
}
.codex-entry.is-open .codex-entry__panel {
  grid-template-rows: 1fr;
}
.codex-entry__panel-inner {
  overflow: hidden;
  min-height: 0;
}

/* ---------- Manuscript body ---------- */
.codex-entry__body {
  padding: .15rem .95rem 1.5rem 1.15rem;
}
.codex-entry__body p {
  max-width: 62ch;
  color: var(--text-dim);
  font-size: .92rem;
  line-height: 1.85;
  border-top: 1px dashed rgba(168, 85, 247, .25);
  padding-top: 1.1rem;
}

/* Illuminated first letter */
.codex-entry__body p::first-letter {
  float: left;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.5em;
  line-height: .82;
  padding: .06em .14em 0 0;
  color: var(--purple-soft);
  text-shadow: 0 0 18px rgba(168, 85, 247, .85), 0 0 48px rgba(168, 85, 247, .5);
}

/* ---------- ≥720px: ledger row layout ---------- */
@media (min-width: 720px) {
  .codex-entry__btn {
    grid-template-columns: 3.4rem 1fr auto 1.4rem;
    grid-template-areas: 'num title ref chev';
    column-gap: 1.4rem;
    padding: 1.25rem 1.2rem 1.25rem 1.4rem;
  }
  .codex-entry.is-open .codex-entry__btn { padding-left: 1.7rem; }

  .codex-entry__num   { font-size: .8rem; }
  .codex-entry__title { font-size: .85rem; }
  .codex-entry__ref   { margin-top: 0; font-size: .6rem; }

  .codex-entry__body {
    padding: .2rem 1.2rem 1.9rem calc(1.4rem + 3.4rem + 1.4rem); /* align with title column */
  }
  .codex-entry__body p { font-size: .95rem; }
}