/*
 * `tpl_immersive` — V2 long-scroll story (chapters + sticky visuals).
 *
 * The scrollytelling is pure CSS `position: sticky`: each chapter pairs a
 * sticky editorial visual (left) with a taller scrolling text column (right).
 * No JS scroll listener, no third-party iframe — deterministic and
 * reduced-motion safe. Chapter headings use the oversized 160px Swiss numeral.
 */

.fm-immersive { padding-top: 0; }

/* ---------- Immersive hero (full-bleed ink) ---------- */
.fm-immersive__hero {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  background: var(--fm-surface-deep);
  color: var(--fm-on-dark);
  padding: clamp(56px, 8vw, 112px) 0 clamp(64px, 9vw, 128px);
}
.fm-immersive__hero-inner {
  max-width: var(--fm-layout-home);
  margin: 0 auto;
  padding: 0 var(--fm-gutter);
  display: grid;
  gap: 24px;
}
.fm-immersive__kicker { display: flex; flex-wrap: wrap; align-items: baseline; gap: 16px; }
.fm-immersive__kicker .fm-section__index { color: var(--fm-on-dark); }
.fm-immersive__kicker .fm-section__index .fm-section__num { color: var(--fm-color-signal); }
.fm-immersive__title {
  font-size: clamp(46px, 7.4vw, 104px);
  letter-spacing: -0.04em;
  line-height: 0.94;
  color: var(--fm-on-dark);
  max-width: 1080px;
}
.fm-immersive__standfirst {
  font-family: var(--fm-font-body);
  font-size: 21px;
  line-height: 1.55;
  color: var(--fm-on-dark-muted);
  margin: 0;
  max-width: 700px;
}
.fm-immersive__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 22px;
  padding-top: 18px;
  border-top: var(--fm-line-hairline) solid rgba(216, 221, 227, 0.25);
  font-family: var(--fm-font-data);
  font-size: var(--fm-type-micro);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fm-on-dark-muted);
}
.fm-immersive__meta .fm-immersive__sep { color: var(--fm-color-signal); }
.fm-immersive__cue { font-family: var(--fm-font-data); font-size: var(--fm-type-micro); letter-spacing: 0.12em; text-transform: uppercase; color: var(--fm-color-signal); }

/* ---------- Intro (reading tunnel) ---------- */
.fm-immersive__intro { max-width: var(--fm-layout-reading); margin: 96px auto 0; }
.fm-immersive__intro p { font-family: var(--fm-font-body); font-size: 19px; line-height: 1.68; margin: 0 0 1.5em; }
.fm-immersive__intro > p:first-of-type::first-letter {
  font-family: var(--fm-font-disp);
  font-weight: var(--fm-weight-bold);
  font-size: 3.2em;
  line-height: 0.85;
  float: left;
  padding: 6px 10px 0 0;
}

/* ---------- Chapters (sticky visual + scrolling text) ---------- */
.fm-immersive__chapters { margin-top: 96px; display: grid; gap: 120px; }
.fm-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: start;
}
.fm-chapter__media { position: sticky; top: calc(var(--fm-layout-header-h) + 32px); }
.fm-chapter__media .fm-figure__caption { max-width: 520px; }
.fm-chapter__body { max-width: 560px; }
.fm-chapter__num {
  display: block;
  font-family: var(--fm-font-disp);
  font-size: clamp(96px, 11vw, 160px);
  font-weight: var(--fm-weight-bold);
  line-height: 0.8;
  letter-spacing: -0.05em;
  color: var(--fm-color-steel);
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.fm-chapter__title { font-family: var(--fm-font-disp); font-size: clamp(30px, 3.4vw, 44px); font-weight: var(--fm-weight-bold); letter-spacing: -0.025em; line-height: 1.02; margin: 0 0 20px; }
.fm-chapter__body p { font-family: var(--fm-font-body); font-size: 18px; line-height: 1.66; margin: 0 0 1.4em; }
.fm-chapter__captions { list-style: none; margin: 28px 0 0; padding: 16px 0 0; border-top: var(--fm-line-hairline) solid var(--fm-color-grid); display: grid; gap: 10px; }
.fm-chapter__captions li { display: flex; gap: 14px; align-items: baseline; font-family: var(--fm-font-data); font-size: var(--fm-type-micro); letter-spacing: 0.04em; text-transform: uppercase; color: var(--fm-color-steel); }
.fm-chapter__captions strong { color: var(--fm-color-amber-text); font-weight: var(--fm-weight-semibold); min-width: 34px; }

/* ---------- Outro (dark statement) ---------- */
.fm-immersive__outro {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  margin-top: 128px;
  background: var(--fm-surface-deep);
  color: var(--fm-on-dark);
  padding: clamp(64px, 9vw, 120px) 0;
}
.fm-immersive__outro-inner { max-width: var(--fm-layout-home); margin: 0 auto; padding: 0 var(--fm-gutter); display: grid; gap: 20px; }
.fm-immersive__outro-title { font-size: clamp(34px, 5vw, 76px); letter-spacing: -0.03em; line-height: 0.98; color: var(--fm-on-dark); margin: 8px 0 0; max-width: 900px; }
.fm-immersive__outro p { font-family: var(--fm-font-body); font-size: 18px; line-height: 1.6; color: var(--fm-on-dark-muted); margin: 0; max-width: 620px; }
.fm-immersive__outro .fm-label { color: var(--fm-color-signal); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .fm-chapter { grid-template-columns: 1fr; gap: 32px; }
  .fm-chapter__media { position: static; }
  .fm-chapter__body { max-width: var(--fm-layout-reading); }
  .fm-immersive__chapters { gap: 88px; }
}
@media (max-width: 820px) {
  .fm-immersive__intro { margin-top: 64px; }
  .fm-immersive__intro p { font-size: 18px; }
  .fm-chapter__body p { font-size: 17px; }
  .fm-immersive__outro { margin-top: 96px; }
}
@media (max-width: 480px) {
  .fm-immersive__title { font-size: 42px; }
  .fm-immersive__standfirst { font-size: 18px; }
  .fm-chapter__num { font-size: 84px; }
}