/* =========================================================
   Sections — chrome global (header, footer) + sections homepage
   ========================================================= */

/* ---------- HEADER ---------- */
.dm-header {
  position: fixed;            /* sticky-like, géré JS pour scrolled state */
  top: 0; left: 0; right: 0;
  z-index: var(--dm-z-nav);
  color: var(--dm-paper);
  background: transparent;
  transition:
    background var(--dm-dur-med) var(--dm-ease-out),
    color var(--dm-dur-med) var(--dm-ease-out),
    border-color var(--dm-dur-med) var(--dm-ease-out),
    backdrop-filter var(--dm-dur-med) var(--dm-ease-out);
  border-bottom: 1px solid transparent;
}
.dm-header__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px var(--dm-gutter);
  font-family: var(--dm-font-mono);
  font-size: 9.5px;
  letter-spacing: 0.3em;
  color: rgba(245,244,245,0.55);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--dm-dur-med) var(--dm-ease-out), border-color var(--dm-dur-med) var(--dm-ease-out);
}
.dm-header__meta .accent { color: var(--dm-champagne); }
.dm-header__bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--dm-sp-l);
  padding: 20px var(--dm-gutter);
}
.dm-header__nav { display: flex; gap: var(--dm-sp-m); align-items: center; }
.dm-header__nav--right { justify-content: flex-end; }
.dm-header__logo { justify-self: center; color: var(--dm-paper); transition: color var(--dm-dur-med) var(--dm-ease-out); }

/* État "scrolled" : applique du chrome opaque blanc */
.dm-header.is-scrolled {
  background: rgba(245,244,245,0.92);
  backdrop-filter: blur(18px) saturate(120%);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
  border-bottom-color: var(--dm-rule-light);
  color: var(--dm-mineral);
}
.dm-header.is-scrolled .dm-header__meta {
  color: rgba(44,62,80,0.7);
  border-bottom-color: var(--dm-rule-soft);
}
.dm-header.is-scrolled .dm-header__logo { color: var(--dm-mineral); }

/* Variant : header sur fond clair par défaut (pages satellites) */
.dm-header--light {
  background: rgba(245,244,245,0.92);
  backdrop-filter: blur(18px) saturate(120%);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
  border-bottom-color: var(--dm-rule-light);
  color: var(--dm-mineral);
}
.dm-header--light .dm-header__meta {
  color: rgba(44,62,80,0.7);
  border-bottom-color: var(--dm-rule-soft);
}
.dm-header--light .dm-header__logo { color: var(--dm-mineral); }

/* Bouton burger mobile */
.dm-burger {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  position: relative;
}
.dm-burger__bars,
.dm-burger__bars::before,
.dm-burger__bars::after {
  content: "";
  display: block;
  width: 22px; height: 1px;
  background: currentColor;
  transition: transform var(--dm-dur-med) var(--dm-ease-out), opacity var(--dm-dur-fast);
}
.dm-burger__bars::before { position: absolute; transform: translateY(-7px); }
.dm-burger__bars::after  { position: absolute; transform: translateY(7px); }
.is-menu-open .dm-burger__bars { background: transparent; }
.is-menu-open .dm-burger__bars::before { transform: translateY(0) rotate(45deg); }
.is-menu-open .dm-burger__bars::after  { transform: translateY(0) rotate(-45deg); }

/* Menu mobile plein écran */
.dm-mobilemenu {
  position: fixed; inset: 0;
  z-index: calc(var(--dm-z-nav) - 1);
  background: var(--dm-ink);
  color: var(--dm-paper);
  display: flex; flex-direction: column;
  padding: calc(var(--dm-header-h) + var(--dm-header-meta-h) + 24px) var(--dm-gutter) var(--dm-sp-xl);
  transform: translateY(-100%);
  transition: transform var(--dm-dur-slow) var(--dm-ease-in-out);
  visibility: hidden;
}
.is-menu-open .dm-mobilemenu {
  transform: translateY(0);
  visibility: visible;
}
.dm-mobilemenu__list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.dm-mobilemenu__list a {
  display: block;
  font-family: var(--dm-font-serif);
  font-size: clamp(36px, 8vw, 56px);
  font-weight: 400;
  line-height: 1.1;
  padding: 14px 0;
  border-bottom: 1px solid rgba(184,164,140,0.18);
  opacity: 0; transform: translateY(20px);
  transition: opacity .6s var(--dm-ease-out), transform .6s var(--dm-ease-out), color var(--dm-dur-med);
}
.is-menu-open .dm-mobilemenu__list a {
  opacity: 1; transform: translateY(0);
}
/* Délai en cascade — staggered reveal */
.is-menu-open .dm-mobilemenu__list li:nth-child(1) a { transition-delay: .12s; }
.is-menu-open .dm-mobilemenu__list li:nth-child(2) a { transition-delay: .18s; }
.is-menu-open .dm-mobilemenu__list li:nth-child(3) a { transition-delay: .24s; }
.is-menu-open .dm-mobilemenu__list li:nth-child(4) a { transition-delay: .30s; }
.is-menu-open .dm-mobilemenu__list li:nth-child(5) a { transition-delay: .36s; }
.dm-mobilemenu__list a:hover { color: var(--dm-champagne); }
.dm-mobilemenu__foot {
  margin-top: auto;
  padding-top: var(--dm-sp-l);
  border-top: 1px solid rgba(184,164,140,0.18);
  display: grid; gap: 18px;
  font-family: var(--dm-font-mono);
  font-size: 10.5px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--dm-champpale);
}

/* ---------- SECTIONS — homepage ---------- */

/* Marge supérieure suffisante pour que la première section apparaisse sous le header */
main { display: block; }

/* HERO cinématique */
.dm-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  background: var(--dm-ink);
  color: var(--dm-paper);
  overflow: hidden;
  display: grid;
  grid-template-rows: 1fr auto;
  padding: calc(var(--dm-header-h) + var(--dm-header-meta-h) + var(--dm-sp-xl)) var(--dm-gutter) var(--dm-sp-xl);
}
.dm-hero__bg {
  position: absolute; inset: 0; z-index: 0;
  /* Parallax appliqué par JS via translate3d */
  will-change: transform;
}
.dm-hero__bg::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(17,23,28,0.55) 0%, rgba(17,23,28,0.20) 30%, rgba(17,23,28,0.55) 70%, rgba(17,23,28,0.96) 100%),
    radial-gradient(ellipse at 50% 45%, transparent 25%, rgba(0,0,0,0.45) 100%);
}
.dm-hero__inner {
  position: relative; z-index: 1;
  align-self: center;
  max-width: 1300px;
}
.dm-hero__kicker { color: var(--dm-champpale); margin-bottom: var(--dm-sp-m); }
.dm-hero__title { color: var(--dm-paper); }

.dm-hero__bottom {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: var(--dm-sp-2xl);
  padding-top: var(--dm-sp-l);
  border-top: 1px solid rgba(184,164,140,0.32);
}
.dm-hero__bottom > div:last-child {
  text-align: right;
  display: flex; flex-direction: column; align-items: flex-end; gap: 14px;
}
.dm-hero__scroll {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.dm-hero__scroll-bar {
  width: 1px; height: 48px;
  background: linear-gradient(180deg, rgba(184,164,140,0.6), transparent);
}
.dm-hero__intro {
  font-family: var(--dm-font-serif);
  font-size: clamp(20px, 2vw, 32px);
  line-height: 1.15;
  color: var(--dm-paper);
  max-width: 520px;
  margin: 10px 0 0;
}

/* Sections "rythme" — alternance bone / paper / ink */
.dm-section {
  padding: var(--dm-section-y) var(--dm-gutter);
  border-bottom: 1px solid var(--dm-rule-light);
}
.dm-section--bone  { background: var(--dm-bone); }
.dm-section--paper { background: var(--dm-paper); }
.dm-section--ink   { background: var(--dm-ink); color: var(--dm-paper); border-bottom-color: rgba(184,164,140,0.18); }
.dm-section--flush { padding-left: 0; padding-right: 0; }

/* Grille "marker + contenu" : 1/11 colonnes */
.dm-section__grid {
  display: grid;
  grid-template-columns: 1fr 11fr;
  gap: var(--dm-sp-l);
}
.dm-section__title-row {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--dm-sp-2xl);
  align-items: end;
}

/* Liste éditoriale (Nos ouvrages) — 5 lignes */
.dm-editorial-row {
  display: grid;
  grid-template-columns: 5fr 4fr 3fr;
  gap: var(--dm-sp-m);
  align-items: center;
  padding: var(--dm-sp-l) 0;
  border-top: 1px solid var(--dm-rule-light);
}
.dm-editorial-row--reversed {
  grid-template-columns: 3fr 4fr 5fr;
}
.dm-editorial-row__media {
  aspect-ratio: 4 / 3;
  position: relative;
}
.dm-editorial-row__num {
  font-family: var(--dm-font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--dm-champagne);
}

/* Savoir-faire — alternance pleine largeur */
.dm-step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid rgba(184,164,140,0.18);
}
.dm-step__media { position: relative; min-height: 420px; }
.dm-step__body {
  padding: var(--dm-sp-2xl) var(--dm-gutter);
  display: flex; flex-direction: column; justify-content: center;
}
.dm-step__num {
  font-family: var(--dm-font-serif);
  font-style: italic;
  font-size: clamp(64px, 9vw, 128px);
  line-height: 0.9;
  font-weight: 300;
  color: var(--dm-champagne);
  margin-bottom: 18px;
}

/* Matières — strip 5 cols */
.dm-matieres-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--dm-sp-xs);
}

/* Réalisations strip 4 cols */
.dm-real-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2px;
}
.dm-real-grid > figure { margin: 0; }

/* Carrousel controls */
.dm-carousel-ctrl {
  display: inline-flex; gap: 14px; align-items: center;
  font-family: var(--dm-font-mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--dm-champagne);
}
.dm-carousel-ctrl__btn {
  width: 42px; height: 42px;
  border: 1px solid rgba(245,244,245,0.3);
  background: transparent;
  color: inherit;
  transition: background var(--dm-dur-med), color var(--dm-dur-med), border-color var(--dm-dur-med);
}
.dm-carousel-ctrl__btn:hover {
  background: var(--dm-champagne);
  color: var(--dm-ink);
  border-color: var(--dm-champagne);
}
.dm-carousel-ctrl__btn--solid {
  background: var(--dm-champagne); color: var(--dm-ink); border-color: var(--dm-champagne);
}
.dm-carousel-ctrl__bar {
  width: 120px; height: 1px; background: rgba(184,164,140,0.2); position: relative;
}
.dm-carousel-ctrl__bar > span {
  position: absolute; left: 0; top: -1px; width: 30px; height: 3px; background: var(--dm-champagne);
}

/* Contact split */
.dm-contact-split {
  display: grid;
  grid-template-columns: 6fr 6fr;
  min-height: 600px;
  border-top: 1px solid rgba(184,164,140,0.2);
  background: var(--dm-ink); color: var(--dm-paper);
}
.dm-contact-split__media { position: relative; min-height: 420px; }
.dm-contact-split__body { padding: var(--dm-section-y) var(--dm-gutter); }
.dm-contact-split__grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--dm-sp-m);
  padding-top: var(--dm-sp-s);
  border-top: 1px solid rgba(184,164,140,0.32);
}

/* Accompagnement — 4 piliers */
.dm-pillars {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--dm-sp-m);
}
.dm-pillar {
  padding-top: 18px;
  border-top: 1px solid var(--dm-champagne);
}
.dm-pillar__title {
  font-family: var(--dm-font-serif); font-size: 24px;
  color: var(--dm-ink); margin: 0 0 8px;
}

/* ---------- FOOTER ---------- */
.dm-footer {
  background: var(--dm-ink);
  color: var(--dm-paper);
  padding: var(--dm-section-y) var(--dm-gutter) var(--dm-sp-l);
}
.dm-footer__top {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--dm-sp-2xl);
  padding-bottom: var(--dm-sp-2xl);
  border-bottom: 1px solid rgba(184,164,140,0.18);
}
.dm-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--dm-sp-l);
}
.dm-footer__nav h4 {
  font-family: var(--dm-font-mono);
  font-size: 10px; letter-spacing: 0.28em;
  text-transform: uppercase; color: var(--dm-champagne);
  margin: 0 0 var(--dm-sp-s);
  font-weight: 500;
}
.dm-footer__nav ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.dm-footer__nav a {
  font-family: var(--dm-font-serif);
  font-size: 18px;
  color: var(--dm-paper);
  transition: color var(--dm-dur-med);
}
.dm-footer__nav a:hover { color: var(--dm-champagne); }

.dm-footer__bottom {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--dm-sp-m);
  padding-top: var(--dm-sp-m);
  font-family: var(--dm-font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(245,244,245,0.5);
}
.dm-footer__bottom a:hover { color: var(--dm-champagne); }
.dm-footer__bottom > div:nth-child(2) { text-align: center; }
.dm-footer__bottom > div:nth-child(3) { text-align: right; }

/* Universe switch (lien vers site architecture) */
.dm-universe-link {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 14px 0 14px;
  border-bottom: 1px solid rgba(184,164,140,0.4);
  font-family: var(--dm-font-serif);
  font-size: 22px;
}
.dm-universe-link::after {
  content: "↗";
  font-family: var(--dm-font-mono);
  font-size: 14px;
  color: var(--dm-champagne);
  transition: transform var(--dm-dur-med);
}
.dm-universe-link:hover::after { transform: translate(4px, -4px); }