/* ============ IMRAN LEO — système global (« PLAN-SÉQUENCE 23:41–06:12 ») ============ */

@font-face {
  font-family: 'Instrument Serif';
  src: url('../media/fonts/InstrumentSerif-Regular.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Instrument Serif';
  src: url('../media/fonts/InstrumentSerif-Italic.woff2') format('woff2');
  font-weight: 400; font-style: italic; font-display: swap;
}
@font-face {
  font-family: 'Archivo';
  src: url('../media/fonts/Archivo-var.woff2') format('woff2-variations');
  font-weight: 100 900; font-style: normal; font-display: swap;
}

:root {
  --noir: #08090B; --noir2: #111013;
  --ambre: #DCA856; --ambre2: #FFC551; --sable: #F2D692;
  --bleu: #071336; --bleu2: #6594B7;
  --magenta: #C2185B; --rouge: #8B1A1A; --terra: #A45E46;
  --blanc: #F2EFE6; --or: #B8A67E;
  --serif: 'Instrument Serif', 'Didot', serif;
  --sans: 'Archivo', 'Helvetica Neue', sans-serif;
  --night: 0; --rms: 0; --rms-bass: 0;
  color-scheme: dark;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background:
    linear-gradient(rgba(7, 19, 54, calc(var(--night) * 0.55)), rgba(7, 19, 54, calc(var(--night) * 0.35))),
    var(--noir);
  color: var(--blanc);
  font-family: var(--sans);
  font-size: 16px; line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--ambre); color: var(--noir); }

/* ---------- bilingue ---------- */
/* blocs éditoriaux : les deux langues visibles, dominance inversée */
.bl { display: block; }
.bl .fr, .bl .en { display: block; }
html[data-lang="fr"] .bl .fr, html[data-lang="en"] .bl .en {
  font-family: var(--serif); font-size: 1.35em; line-height: 1.45; color: var(--blanc);
}
html[data-lang="fr"] .bl .en, html[data-lang="en"] .bl .fr {
  font-family: var(--sans); font-size: max(.78em, 12px); font-weight: 370;
  letter-spacing: .015em; line-height: 1.5; max-width: 62ch;
  color: color-mix(in srgb, var(--blanc) 55%, transparent); margin-top: .4em;
}
.manifeste .bl :is(.en, .fr), .carton-texte :is(.en, .fr),
.generique .bl :is(.en, .fr), .drown-verses .bl :is(.en, .fr) { margin-inline: auto; }
/* libellés UI : seule la langue active */
button .fr, button .en, a .fr, a .en, .ui .fr, .ui .en { display: none; }
html[data-lang="fr"] button .fr, html[data-lang="fr"] a .fr, html[data-lang="fr"] .ui .fr,
html[data-lang="en"] button .en, html[data-lang="en"] a .en, html[data-lang="en"] .ui .en { display: inline; }
/* spans lang="…" générés par les modules JS : langue active seule, hors blocs .bl */
html[data-lang="fr"] span[lang="en"]:not(.bl span) { display: none; }
html[data-lang="en"] span[lang="fr"]:not(.bl span) { display: none; }

/* ---------- header ---------- */
#topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 40;
  display: flex; justify-content: space-between; align-items: center;
  padding: max(14px, env(safe-area-inset-top)) 20px 8px;
  pointer-events: none;
  mix-blend-mode: normal;
}
#tc {
  font-family: var(--sans); font-variant-numeric: tabular-nums;
  font-size: 13px; letter-spacing: .22em; color: var(--or);
  pointer-events: auto; cursor: default; user-select: none;
}
html.insomnie #tc { color: var(--bleu2); }
#lang-toggle {
  pointer-events: auto; background: none; border: 1px solid color-mix(in srgb, var(--or) 40%, transparent);
  color: var(--or); font-family: var(--sans); font-size: 11px; letter-spacing: .18em;
  padding: 5px 12px; cursor: pointer; border-radius: 2px;
}
#lang-toggle:hover, #lang-toggle:focus-visible { border-color: var(--ambre); color: var(--ambre); }

/* ---------- grain 35mm ---------- */
#grain {
  position: fixed; inset: -60px; z-index: 60; pointer-events: none;
  background: url('../media/img/grain.png');
  opacity: calc(0.04 + var(--rms) * 0.03);
  mix-blend-mode: overlay;
  animation: grain-shift .5s steps(8) infinite;
}
html.insomnie #grain { opacity: calc(0.08 + var(--rms) * 0.03); }
@keyframes grain-shift {
  0% { transform: translate(0, 0); } 25% { transform: translate(-18px, 12px); }
  50% { transform: translate(14px, -20px); } 75% { transform: translate(-10px, -8px); }
  100% { transform: translate(0, 0); }
}
@media (prefers-reduced-motion: reduce) { #grain { animation: none; } }

/* ---------- sections ---------- */
section { position: relative; }
section[data-pole="chaud"] { --encre: var(--ambre); }
section[data-pole="froid"] { --encre: var(--bleu2); }
section[data-pole="rouge"] { --encre: var(--magenta); }
section[data-pole="noir"] { --encre: var(--or); }

.titre {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(2.6rem, 7vw, 4.6rem); line-height: 1.08;
  color: var(--blanc); margin-bottom: .7em;
}
.titre .en, .titre .fr { font-family: var(--serif) !important; }
html[data-lang="fr"] .titre .fr, html[data-lang="en"] .titre .en { font-size: 1em !important; }
html[data-lang="fr"] .titre .en, html[data-lang="en"] .titre .fr {
  font-size: .8rem !important; font-family: var(--sans) !important; font-weight: 460;
  letter-spacing: .3em; margin-top: 1em; max-width: none;
  text-transform: uppercase; color: var(--or) !important;
}
.centre { text-align: center; }

/* ---------- PLAN 0 amorce ---------- */
#seq0 {
  height: 100svh; display: grid; place-items: center;
  background: var(--noir);
}
.carton-officiel { text-align: center; padding: 0 24px; }
.carton-pre {
  font-family: var(--serif); font-style: italic;
  font-size: clamp(1.1rem, 2.6vw, 1.7rem); color: var(--or);
}
.carton-pre .fr, .carton-pre .en { display: none; font-family: inherit; }
html[data-lang="fr"] .carton-pre .fr, html[data-lang="en"] .carton-pre .en { display: inline; }
.carton-nom {
  font-family: var(--serif); font-size: clamp(2.6rem, 7vw, 4.6rem);
  color: var(--blanc); margin-top: .3em; letter-spacing: .01em;
}
#preload-light {
  position: absolute; bottom: 18vh; left: 50%; width: 6px; height: 6px;
  border-radius: 50%; background: var(--ambre2); opacity: .25;
  box-shadow: 0 0 24px 8px color-mix(in srgb, var(--ambre) 65%, transparent);
  transition: opacity .6s;
}
#seq0.intro-done #preload-light { opacity: 0 !important; transition: opacity 1.2s; }

/* ---------- cartons-ellipses ---------- */
.carton {
  min-height: 88svh; display: grid; place-items: center;
  padding: 0 8vw;
  background: var(--noir);
}
.carton-texte {
  max-width: 34ch; text-align: center;
  opacity: clamp(0, calc(1.6 - 4.2 * max(var(--p, .5) - .5, .5 - var(--p, .5))), 1);
  transform: translateY(calc((0.5 - var(--p, .5)) * 36px));
}
@media (prefers-reduced-motion: reduce) { .carton-texte { transform: none; } }
html.boot-failed .carton-texte { opacity: 1 !important; transform: none !important; }
html[data-lang="fr"] .carton-texte .fr, html[data-lang="en"] .carton-texte .en {
  font-family: var(--serif); font-style: italic; font-size: clamp(1.5rem, 3.6vw, 2.4rem);
  color: var(--or); line-height: 1.35;
}

/* ---------- SÉQ 2 bureau ---------- */
#seq2 { padding: 18vh 6vw; }
.seq2-grid {
  display: grid; gap: 6vw; max-width: 1200px; margin: 0 auto;
  grid-template-columns: 1fr 1.1fr;
  align-items: start;
}
.seq2-photo img, .seq2-photo-2 img { width: 100%; height: auto; display: block; border-radius: 2px; }
.seq2-photo-2 { grid-column: 1; margin-top: 8vh; }
.seq2-texte { grid-column: 2; grid-row: 1 / span 2; max-width: 54ch; }
.seq2-texte .bl { margin-bottom: 1.5em; }
@media (max-width: 860px) {
  .seq2-grid { grid-template-columns: 1fr; }
  .seq2-texte { grid-column: 1; grid-row: auto; }
  .seq2-photo-2 { display: none; }
}

/* ---------- SÉQ 3 miroir ---------- */
#seq3 { padding: 16vh 6vw; text-align: center; }
.manifeste { max-width: 46ch; margin: 8vh auto 0; text-align: center; }
.manifeste-ligne { margin-bottom: 1.1em; }

/* ---------- SÉQ 4 studio ---------- */
#seq4 {
  padding: 18vh 6vw;
  background:
    radial-gradient(120% 90% at 70% 20%, color-mix(in srgb, var(--rouge) 16%, transparent), transparent 60%),
    var(--noir);
}
.seq4-grid { display: grid; gap: 4vw; max-width: 1200px; margin: 0 auto; grid-template-columns: repeat(3, 1fr); align-items: center; }
.seq4-grid .titre { grid-column: 1 / -1; }
.seq4-grid figure img { width: 100%; height: auto; display: block; border-radius: 2px; }
.seq4-texte { grid-column: 1 / 3; max-width: 52ch; }
.seq4-grid video { grid-column: 3; width: 100%; border-radius: 2px; aspect-ratio: 9/16; object-fit: cover; }
.ombre-micro img { transform-origin: bottom center; transform: scaleY(calc(1 + var(--rms-bass) * 0.06)); }
@media (max-width: 860px) {
  .seq4-grid { grid-template-columns: 1fr 1fr; }
  .seq4-texte, .seq4-grid video { grid-column: 1 / -1; }
  .seq4-grid video { aspect-ratio: auto; max-height: 60svh; }
}

/* ---------- SÉQ 5 traversée ---------- */
#seq5 { min-height: 300vh; }
.seq5-stage { position: sticky; top: 0; min-height: 100svh; overflow: hidden; display: flex; flex-direction: column; justify-content: center; padding: 10vh 0 6vh; }
.streaks-slot { position: absolute; inset: 0; }
#seq5 .titre, .seq5-intro { position: relative; z-index: 2; padding: 0 6vw; }
@media (max-width: 767px) {
  #seq5 { min-height: auto; }
  .seq5-stage { position: relative; }
}

/* ---------- SÉQ 6 insomnie ---------- */
#seq6 { min-height: 110svh; }
.drown-stage { position: relative; min-height: 110svh; overflow: hidden; display: grid; place-items: center; }
.drown-bg {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: .34; filter: saturate(.7);
}
.drown-verses { position: relative; z-index: 3; text-align: center; padding: 0 8vw; max-width: 640px; }
.drown-verses .titre { margin-bottom: 2em; }
.vers-noyade { margin-bottom: 2.2em; }
.ligne-sacre { opacity: .75; }

/* ---------- SÉQ 7 aube ---------- */
#seq7 {
  padding: 16vh 6vw 22vh;
  background:
    radial-gradient(70% 35% at 50% 100%, color-mix(in srgb, var(--sable) calc(var(--p, 0) * 18%), transparent), transparent 70%),
    linear-gradient(180deg, transparent, color-mix(in srgb, var(--bleu) 55%, transparent));
}
.aube-facade { width: min(38vw, 320px); margin: 0 auto 10vh; position: relative; }
.aube-facade img { width: 100%; height: auto; display: block; opacity: .8; }
.aube-facade::after { /* sa fenêtre s'éteint : voile posé par JS via .window-off */
  content: ''; position: absolute; inset: 0; background: transparent; transition: background 3s;
}
.aube-facade.window-off::after { background: color-mix(in srgb, var(--noir) 35%, transparent); }
.generique { max-width: 680px; margin: 0 auto; text-align: center; }
.gen-signature { font-family: var(--serif); margin-bottom: 8vh; }
.gen-signature .pre { font-style: italic; color: var(--or); font-size: 1.1rem; }
.gen-signature .pre .fr, .gen-signature .pre .en { display: none; font-family: inherit; }
html[data-lang="fr"] .gen-signature .pre .fr, html[data-lang="en"] .gen-signature .pre .en { display: inline; }
.gen-signature .nom { font-size: 2.2rem; color: var(--blanc); }
.gen-tracklist { list-style: none; margin-bottom: 8vh; }
.gen-track {
  width: 100%; display: flex; gap: 1em; align-items: baseline; justify-content: space-between;
  background: none; border: 0; border-bottom: 1px solid color-mix(in srgb, var(--or) 18%, transparent);
  color: var(--blanc); padding: .6em .2em; cursor: pointer; font-size: 1rem; text-align: left;
}
.gen-track:hover, .gen-track:focus-visible { color: var(--ambre2); }
.gen-track .n { font-family: var(--sans); font-size: .75em; color: color-mix(in srgb, var(--or) 85%, transparent); font-variant-numeric: tabular-nums; }
.gen-track .t { font-family: var(--serif); font-size: 1.25em; flex: 1; }
.gen-track .d { font-family: var(--sans); font-size: .75em; color: color-mix(in srgb, var(--or) 85%, transparent); font-variant-numeric: tabular-nums; }
.gen-credits { margin-bottom: 6vh; }
.gen-credits .cred { margin-bottom: .8em; }
.gen-liens { display: flex; gap: 2.2em; justify-content: center; margin-bottom: 8vh; flex-wrap: wrap; }
.gen-liens a {
  color: var(--ambre); text-decoration: none; font-family: var(--sans);
  letter-spacing: .14em; font-size: .85rem; text-transform: uppercase;
  border-bottom: 1px solid transparent;
}
.gen-liens a:hover, .gen-liens a:focus-visible { border-bottom-color: var(--ambre); }
#ligne-4h07 { margin-bottom: 6vh; }
html[data-lang="fr"] #ligne-4h07 .fr, html[data-lang="en"] #ligne-4h07 .en {
  font-family: var(--serif); font-style: italic; font-size: 1.05rem; color: color-mix(in srgb, var(--blanc) 65%, transparent);
}
#ligne-4h07 { cursor: text; }
.gen-actions { display: flex; gap: 1.4em; justify-content: center; margin-bottom: 7vh; flex-wrap: wrap; }
.gen-actions button {
  background: none; border: 1px solid color-mix(in srgb, var(--or) 45%, transparent);
  color: var(--or); font-family: var(--sans); letter-spacing: .16em; font-size: .8rem;
  padding: 10px 22px; cursor: pointer; border-radius: 2px; text-transform: uppercase;
}
.gen-actions button:hover, .gen-actions button:focus-visible { border-color: var(--ambre); color: var(--ambre); }
.mentions { opacity: .5; font-size: .85rem; }
.tc-final { font-variant-numeric: tabular-nums; letter-spacing: .3em; text-indent: .3em; color: color-mix(in srgb, var(--sable) calc(var(--p, 0) * 100%), var(--bleu2)); margin-top: 8vh; }
#print-facade { display: none; }

/* ---------- dialog partagé ---------- */
#dlg {
  background: var(--noir2); color: var(--blanc);
  border: 1px solid color-mix(in srgb, var(--or) 30%, transparent); border-radius: 3px;
  padding: 0; max-width: min(92vw, 560px); max-height: 86svh; overflow: auto;
}
#dlg::backdrop { background: rgba(4, 5, 8, .82); backdrop-filter: blur(3px); }
#dlg-content { padding: 34px 30px 30px; }
#dlg-close {
  position: sticky; top: 10px; margin-left: calc(100% - 44px); z-index: 2;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--noir); border: 1px solid color-mix(in srgb, var(--or) 40%, transparent);
  color: var(--or); font-size: 18px; cursor: pointer; line-height: 1;
}
#dlg-close:hover, #dlg-close:focus-visible { color: var(--ambre); border-color: var(--ambre); }

/* ---------- focus & a11y ---------- */
:focus-visible { outline: 2px solid var(--ambre); outline-offset: 3px; }
button { -webkit-tap-highlight-color: transparent; }
@media (max-width: 480px) { body { font-size: 15px; } }

/* ---------- rewind visuel ---------- */
body.rewind #grain { opacity: .12; animation-duration: .12s; }

/* ---------- boot fail / noscript : tout doit rester lisible ---------- */
html.boot-failed .facade-stage { height: auto; }

/* ── chantier 3 : plan 0 annonce le dispositif ── */
.carton-pre { font-size: clamp(1rem, 1.9vw, 1.3rem); }
.carton-nom { margin-top: .45em; }
.gen-signature .pre { font-size: 1rem; }
.carton-invite { margin-top: 2.6em; opacity: 0; animation: invite-in 1.2s ease 2s forwards; }
.carton-invite .fr, .carton-invite .en {
  font-family: var(--serif) !important; font-style: italic;
  font-size: 1.05rem !important; color: var(--or) !important; margin-top: .2em !important;
}
@keyframes invite-in { to { opacity: 1; } }
.carton-officiel::after {
  content: ''; display: block; width: 1px; height: 32px; margin: 2.2em auto 0;
  background: var(--or); transform-origin: top;
  animation: pulse-y 2.4s ease-in-out infinite;
}
@keyframes pulse-y { 50% { transform: scaleY(.55); opacity: .5; } }
@media (prefers-reduced-motion: reduce) {
  .carton-invite { animation: none; opacity: 1; }
  .carton-officiel::after { animation: none; }
}

/* ── chantier 7 : la fiche fond dans le travelling (jamais de coupe) ── */
@media (prefers-reduced-motion: no-preference) {
  #dlg[open] { animation: dlg-in .5s cubic-bezier(0.22, 1, 0.36, 1) both; }
  #dlg[open]::backdrop { animation: dlg-bd .5s ease both; }
}
@keyframes dlg-in { from { opacity: 0; transform: translateY(16px) scale(.97); } }
@keyframes dlg-bd { from { opacity: 0; } }

/* ── chantier 14 : finitions pellicule ── */
html { scrollbar-width: thin; scrollbar-color: color-mix(in srgb, var(--or) 45%, transparent) var(--noir); }
::-webkit-scrollbar { width: 8px; background: var(--noir); }
::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--or) 40%, transparent); border-inline: 2px solid var(--noir); }
#lang-toggle, .gen-actions button, .gen-track, .gen-liens a, #dlg-close,
.pl-btn, .fiche-plan .fiche-actions button {
  transition: color .22s ease, border-color .22s ease, background-color .22s ease;
}
.pl-btn svg { transition: transform .12s cubic-bezier(0.34, 1.56, 0.64, 1); }
.pl-btn:active svg { transform: scale(.88); }
#tc.tick { animation: tc-tick .18s steps(2, end); }
@keyframes tc-tick { 50% { opacity: .55; } }
#lang-toggle { text-indent: .18em; }
.facade-legend { text-indent: .08em; }

/* ── chantier 11 : « la prise » — grille asymétrique d'auteur ── */
@media (min-width: 861px) {
  .seq4-grid { grid-template-columns: 1.6fr 1fr 1fr; align-items: start; row-gap: 3vh; }
  .seq4-grid .ombre-micro { grid-column: 1; grid-row: 2 / span 2; }
  .seq4-grid figure:nth-of-type(1) { grid-column: 2; grid-row: 2; }
  .seq4-grid figure:nth-of-type(3) { grid-column: 3; grid-row: 2; margin-top: 7vh; }
  .seq4-texte { grid-column: 2; grid-row: 3; }
  .seq4-grid video { grid-column: 3; grid-row: 3; }
}

/* ── couches shaders : l'atmosphère derrière tout, la pluie derrière le carton ── */
#atmos { position: fixed; inset: 0; z-index: 0; width: 100%; height: 100%; pointer-events: none; }
main, #topbar, #player, #tracklist { position: relative; z-index: 1; }
#seq0 { position: relative; overflow: hidden; background: transparent; }
.rain-slot { position: absolute; inset: 0; z-index: 0; }
.rain-slot canvas { width: 100%; height: 100%; display: block; }
.carton-officiel { position: relative; z-index: 2; }
#preload-light { z-index: 2; }
.carton { background: transparent; }
.drown-stage .water-slot { position: absolute; inset: 0; z-index: 0; }
.water-canvas { width: 100%; height: 100%; display: block; }
.drown-verses { text-shadow: 0 1px 14px rgba(4, 6, 10, .85); }

/* ── bande de pellicule (rushes réels) ── */
.filmstrip {
  display: flex; gap: 0; overflow: hidden; margin: 0 auto 12vh;
  max-width: 1100px; border-block: 1px solid color-mix(in srgb, var(--or) 24%, transparent);
  padding: 14px 0; position: relative;
  background:
    repeating-linear-gradient(90deg, transparent 0 26px, color-mix(in srgb, var(--or) 18%, transparent) 26px 30px) top / 100% 6px no-repeat,
    repeating-linear-gradient(90deg, transparent 0 26px, color-mix(in srgb, var(--or) 18%, transparent) 26px 30px) bottom / 100% 6px no-repeat;
}
.filmstrip img {
  width: calc(100% / 7); aspect-ratio: 3 / 4; object-fit: cover;
  filter: saturate(.85) brightness(.8) contrast(1.05);
  border-inline: 3px solid var(--noir);
}

/* ── grands écrans : le film prend l'échelle du cinéma ── */
@media (min-width: 1800px) {
  body { font-size: 18px; }
  .seq2-grid, .seq4-grid { max-width: 1500px; }
  .generique { max-width: 780px; }
  .facade-wrap { width: min(92%, calc((100svh - 170px) * 0.8)); }
}

/* lisibilité du carton sur la vitre */
.carton-officiel { text-shadow: 0 1px 18px rgba(4, 5, 8, .9); }

/* ── HERO : le portrait plein cadre, le lockup par-dessus ── */
#seq0 { display: block; }
.hero-media { position: absolute; inset: 0; overflow: hidden; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; display: block; filter: brightness(.85); }
.hero-media .photo-gl { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-media.gl-on img { visibility: hidden; }
.hero-media::after { content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(60% 55% at 12% 88%, rgba(8,9,11,.78), transparent 70%),
    linear-gradient(180deg, rgba(8,9,11,.5), transparent 30%, transparent 55%, rgba(8,9,11,.85)); }
.hero-lockup {
  position: absolute; left: 6vw; bottom: 12vh; z-index: 2; text-align: left; max-width: 80vw;
}
.hero-lockup .carton-pre { font-size: clamp(1rem, 1.6vw, 1.35rem); color: var(--sable); text-shadow: 0 1px 10px rgba(4,5,8,.9); }
.hero-lockup .carton-nom {
  text-shadow: 0 2px 26px rgba(4,5,8,.55);
  font-size: clamp(4rem, 11vw, 11rem); line-height: .96; letter-spacing: -.01em; margin: .08em 0 .2em -0.04em;
}
.hero-lockup .carton-invite { margin-top: 1.2em; }
.hero-lockup .carton-invite .fr, .hero-lockup .carton-invite .en {
  font-size: 1rem !important; color: var(--sable) !important; text-shadow: 0 1px 10px rgba(4,5,8,.9);
}
#seq0 .carton-officiel::after { display: none; }
.hero-lockup::after {
  content: ''; display: block; width: 1px; height: 34px; margin-top: 2em;
  background: var(--or); transform-origin: top; animation: pulse-y 2.4s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) { .hero-lockup::after { animation: none; } }

/* ── plans photo GL ── */
[data-photo-gl] { position: relative; overflow: hidden; }
[data-photo-gl] .photo-gl { position: absolute; inset: 0; width: 100%; height: 100%; }
[data-photo-gl].gl-on > img { visibility: hidden; }
.water-photo { position: absolute; inset: 0; z-index: 0; }
.water-photo img { width: 100%; height: 100%; object-fit: cover; }

/* ── marqueurs de chapitre : la trame lisible ── */
.chap {
  display: flex; align-items: baseline; gap: 1.1em;
  margin: 0 0 4vh; padding: 0 6vw;
  font-family: var(--sans); font-size: .78rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--or);
}
#seq1 .chap { position: absolute; top: max(56px, 7vh); left: 0; z-index: 5; }
.chap-n { font-family: var(--serif); font-size: 1.5em; letter-spacing: .08em; color: var(--blanc); }
.chap-tc { font-variant-numeric: tabular-nums; opacity: .75; }
.chap .fr, .chap .en { letter-spacing: .22em; }
#seq2 .chap, #seq3 .chap, #seq4 .chap, #seq5 .chap, #seq6 .chap, #seq7 .chap { max-width: 1200px; margin-inline: auto; }
#seq3 .chap, #seq5 .chap, #seq7 .chap { justify-content: center; }
#seq6 .chap { position: relative; z-index: 4; padding-top: 6vh; }
#seq7 .chap { padding-top: 0; }

/* ── la colonne de la nuit ── */
#rail {
  position: fixed; right: 22px; top: 50%; transform: translateY(-50%);
  z-index: 35; display: flex; flex-direction: column; gap: 14px;
}
#rail .rail-line {
  position: absolute; left: 5px; top: 4px; bottom: 4px; width: 1px;
  background: color-mix(in srgb, var(--or) 22%, transparent);
}
#rail .rail-dot {
  position: absolute; left: -2px; width: 5px; height: 5px; border-radius: 50%;
  background: var(--ambre2); box-shadow: 0 0 8px var(--ambre);
  transition: top .18s linear;
}
.rail-ch {
  display: flex; align-items: center; gap: 10px;
  background: none; border: 0; padding: 2px 0; cursor: pointer;
  color: color-mix(in srgb, var(--or) 60%, transparent);
}
.rail-ch .rail-n {
  width: 11px; font-family: var(--serif); font-size: .72rem; text-align: center;
  transition: color .2s;
}
.rail-ch .rail-label {
  display: flex; gap: .7em; align-items: baseline;
  font-family: var(--sans); font-size: .68rem; letter-spacing: .14em;
  opacity: 0; transform: translateX(6px); transition: opacity .2s, transform .2s;
  white-space: nowrap; pointer-events: none;
}
.rail-ch .rail-tc { font-variant-numeric: tabular-nums; color: var(--or); }
#rail:hover .rail-label, .rail-ch:focus-visible .rail-label { opacity: 1; transform: none; }
.rail-ch.on { color: var(--blanc); }
.rail-ch.on .rail-n { color: var(--ambre2); }
.rail-ch:focus-visible { outline: 2px solid var(--ambre); outline-offset: 3px; }