/* =====================================================================
   HBI — Henri Bismuth Hepatobiliary Institute
   Design system. Marine + ivoire + accent laiton. Éditorial, sobre.
   ===================================================================== */

/* ---------- Police Redaction (auto-hébergée) ---------- */
@font-face {
  font-family: "Redaction";
  src: url("../fonts/Redaction_10-Regular.woff2") format("woff2");
  font-weight: 300 550;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Redaction";
  src: url("../fonts/Redaction_10-Bold.woff2") format("woff2");
  font-weight: 600 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Redaction";
  src: url("../fonts/Redaction_10-Italic.woff2") format("woff2");
  font-weight: 300 700;
  font-style: italic;
  font-display: swap;
}

/* ---------- Police Advercase (titres, auto-hébergée) ---------- */
@font-face {
  font-family: "Advercase";
  src: url("../fonts/Advercase-Regular.woff2") format("woff2");
  font-weight: 300 550;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Advercase";
  src: url("../fonts/Advercase-Bold.woff2") format("woff2");
  font-weight: 600 800;
  font-style: normal;
  font-display: swap;
}

/* ---------- Design tokens ---------- */
:root {
  /* Couleurs — noir / blanc / beige uniquement */
  --ink:        #161310;   /* noir chaud — texte / surfaces sombres */
  --ink-2:      #2c2823;
  --muted:      #6f6759;   /* taupe — texte secondaire */
  --paper:      #ffffff;   /* blanc — fond principal */
  --surface:    #ffffff;
  --surface-2:  #f4f7fb;   /* panneau minoritaire */
  --line:       rgba(22, 19, 16, .16);
  --line-soft:  rgba(22, 19, 16, .09);
  --accent:     #161310;   /* = ink (monochrome) */
  --accent-2:   #2563eb;   /* bleu moderne (accent) */
  --on-ink:     #f3ede1;   /* texte clair sur noir */
  --on-ink-mut: #b8ad99;

  /* Typo */
  --serif: "Advercase", Georgia, "Times New Roman", serif;
  --sans:  "Figtree", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* Échelle fluide */
  --step-xs:  clamp(0.75rem, 0.72rem + 0.15vw, 0.82rem);
  --step-sm:  clamp(0.875rem, 0.84rem + 0.18vw, 0.95rem);
  --step-0:   clamp(1rem, 0.96rem + 0.22vw, 1.125rem);
  --step-1:   clamp(1.2rem, 1.12rem + 0.4vw, 1.45rem);
  --step-2:   clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
  --step-3:   clamp(2rem, 1.7rem + 1.5vw, 3rem);
  --step-4:   clamp(2.6rem, 2.05rem + 2.75vw, 4.4rem);

  /* Rythme */
  --shell:   1200px;
  --header-h: 78px;
  --measure: 64ch;
  --gutter:  clamp(1.25rem, 5vw, 4rem);
  --section: clamp(4.5rem, 9vw, 9rem);
  --radius:  32px;

  /* Mouvement */
  --ease: cubic-bezier(.8, 0, 0, .7);
  --t:    .5s var(--ease);

  --shadow: 0 1px 2px rgba(22,19,16,.04),
            0 12px 32px -12px rgba(22,19,16,.16);
}

/* Bascule typographique. Rollback : FONT_THEME='default' dans inc/bootstrap.php
   (restaure Spectral + Inter ci-dessus, sans toucher au reste). */
html[data-fonts="redaction"] {
  --serif: "Advercase", Georgia, "Times New Roman", serif;       /* titres uniquement */
  --sans:  "Figtree", system-ui, -apple-system, "Segoe UI", sans-serif; /* corps, UI, CTA, eyebrow */
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; corner-shape: squircle; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink);
  background: var(--surface-2);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: 0; left: 50%; transform: translate(-50%, -120%);
  z-index: 100; background: var(--ink); color: var(--on-ink);
  padding: .7rem 1.2rem; border-radius: 0 0 10px 10px; font-size: var(--step-sm);
  transition: transform var(--t);
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- Layout ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--section); }

/* ---------- Typographie ---------- */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: balance;
}
h1 { font-size: var(--step-4); font-weight: 400; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }

p { text-wrap: pretty; }
p, a { letter-spacing: -0.02em; }
.lead {
  font-size: var(--step-1);
  line-height: 1.55;
  color: var(--ink-2);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--sans);
  font-size: var(--step-xs);
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink);
}
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: currentColor;
}

.prose { max-width: var(--measure); }
.prose p + p { margin-top: 1.15em; }
.prose strong { font-weight: 600; color: var(--ink); }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .85em 1.6em;
  font-family: var(--sans);
  font-size: var(--step-sm);
  font-weight: 400;
  letter-spacing: -0.02em;
  border-radius: 24px;
  border: 1px solid transparent;
  transition: background var(--t), color var(--t), border-color var(--t), transform .25s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn__arrow { transition: transform .35s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

.btn--primary { background: var(--ink); color: var(--on-ink); }
.btn--primary:hover { background: var(--surface); color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }

.btn--ghost { border-color: var(--line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--ink); background: var(--ink); color: var(--on-ink); }

.btn--light { background: var(--paper); color: var(--ink); }
.btn--light:hover { background: transparent; color: var(--on-ink); box-shadow: inset 0 0 0 1px var(--on-ink); }

/* Lien fléché texte */
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-weight: 550;
  font-size: var(--step-sm);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color var(--t), border-color var(--t);
}
.arrow-link svg { transition: transform .35s var(--ease); }
.arrow-link:hover { color: var(--accent-2); border-color: var(--accent); }
.arrow-link:hover svg { transform: translateX(4px); }

/* =====================================================================
   HEADER
   ===================================================================== */
.site-header {
  position: fixed;
  top: 14px;
  left: 0;
  right: 0;
  z-index: 50;
  max-width: var(--shell);
  margin-inline: auto;
  background: transparent;
}
.site-header.is-stuck .site-header__inner {
  box-shadow: 0 8px 30px -22px rgba(22,19,16,.5);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 78px;
  background: #fff;
  border-radius: var(--radius);
  transition: box-shadow var(--t);
}

.brand { display: flex; align-items: baseline; gap: .8rem; }
.brand__mark {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: .04em;
  color: var(--ink);
}
.brand__name {
  font-size: var(--step-xs);
  letter-spacing: .04em;
  color: var(--muted);
  border-left: 1px solid var(--line);
  padding-left: .8rem;
}

.nav__list { display: flex; align-items: center; gap: 24px; }
.nav__link {
  position: relative;
  font-size: var(--step-sm);
  font-weight: 450;
  color: var(--ink-2);
  padding: .4rem 0;
  transition: color var(--t);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--ink); }

.nav-toggle { display: none; }

/* Sélecteur de langue */
.site-header__inner .nav { margin: auto; }
.lang-switch {
  display: flex;
  align-items: center;
  gap: .45rem;
  font-size: var(--step-xs);
  font-weight: 500;
  letter-spacing: .06em;
}
.lang-switch a { color: var(--muted); transition: color var(--t); }
.lang-switch a:hover { color: var(--ink); }
.lang-switch a.is-active { color: var(--ink); font-weight: 600; }
.lang-switch span { color: var(--line-strong); }

/* =====================================================================
   HERO
   ===================================================================== */
.hero {
  position: relative;
  padding-block: calc(var(--header-h) + clamp(2rem, 6vw, 5rem)) clamp(3.5rem, 7vw, 6rem);
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.hero__title {
  margin-top: 1.4rem;
  font-size: clamp(2.2rem, 1.7rem + 2.2vw, 3.6rem);
}
.hero__title em {
  font-style: normal;
  color: var(--accent-2);
}
.hero__lead {
  margin-top: 1.8rem;
  max-width: 46ch;
}
.hero__actions {
  margin-top: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Carte portrait / citation */
.hero__aside {
  position: relative;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--on-ink);
  padding: clamp(1.8rem, 3vw, 2.6rem);
  box-shadow: var(--shadow);
}
.hero__aside::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(243,237,225,.14);
  border-radius: calc(var(--radius) - 6px);
  pointer-events: none;
}
.hero__quote {
  font-family: var(--serif);
  font-size: var(--step-1);
  font-style: italic;
  line-height: 1.45;
  color: var(--on-ink);
}
.hero__cite {
  margin-top: 1.6rem;
  font-family: var(--sans);
  font-size: var(--step-sm);
  font-style: normal;
  color: var(--on-ink-mut);
}
.hero__cite strong { display: block; color: var(--on-ink); font-weight: 600; letter-spacing: .02em; }

/* Variante portrait : l'image remplit la carte (pas de fond ni de cadre interne) */
.hero__aside--portrait { background: none; padding: 0; box-shadow: none; }
.hero__aside--portrait::after { display: none; }
.hero__aside--portrait img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Bandeau de chiffres */
.stats {
  margin-top: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.stat { padding: clamp(1.6rem, 3vw, 2.2rem) clamp(1rem, 2vw, 1.8rem); }
.stat + .stat { border-left: 1px solid var(--line); }
.stat__num {
  font-family: var(--serif);
  font-size: var(--step-3);
  font-weight: 500;
  color: var(--ink);
  line-height: 1;
}
.stat__num span { color: var(--accent-2); }
.stat__label {
  margin-top: .6rem;
  font-size: var(--step-sm);
  color: var(--muted);
}

/* =====================================================================
   EDITORIAL
   ===================================================================== */
.editorial__grid {
  display: grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: clamp(2rem, 6vw, 5.5rem);
}
.editorial__head { position: sticky; top: 110px; align-self: start; }
.editorial__signature {
  margin-top: 2rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: .75rem;
}
.editorial__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex: 0 0 auto;
}
.editorial__signature strong {
  display: block;
  font-family: var(--serif);
  font-size: var(--step-1);
  font-weight: 500;
}
.editorial__signature span { font-size: var(--step-sm); color: var(--muted); }

.editorial__body { font-size: var(--step-1); line-height: 1.6; color: var(--ink-2); }
.editorial__body .dropcap::first-letter,
.editorial__body--cms > p:first-of-type::first-letter {
  font-family: var(--serif);
  float: left;
  font-size: 3.4em;
  line-height: .82;
  padding: .05em .12em 0 0;
  color: var(--accent-2);
  font-weight: 500;
}

/* =====================================================================
   PILIERS / MISSION
   ===================================================================== */
.pillars { background: var(--surface); }
.pillars__head { max-width: 56ch; }
.pillars__grid {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}
.pillar { padding: clamp(1.6rem, 3vw, 2.2rem); }
.pillar + .pillar { border-left: 1px solid var(--line); }
.pillar__num {
  font-family: var(--serif);
  font-size: var(--step-sm);
  color: var(--accent-2);
  letter-spacing: .1em;
}
.pillar h3 { margin-top: 1rem; font-size: var(--step-1); }
.pillar p { margin-top: .8rem; font-size: var(--step-sm); color: var(--muted); }

/* =====================================================================
   APPEL À L'ACTION
   ===================================================================== */
.cta-band {
  background: var(--ink);
  color: var(--on-ink);
  border-radius: var(--radius);
  padding: clamp(2.6rem, 6vw, 5rem);
  padding-right: calc(40% + clamp(1.5rem, 3vw, 3rem));
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.4rem, 3vw, 2rem);
  align-items: start;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
/* Image sur les 40% de droite (contain) */
.cta-band::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 40%;
  background: url('../img/foie.avif') center / contain no-repeat;
  pointer-events: none;
}
.cta-band > * { position: relative; z-index: 1; }
.cta-band .eyebrow { color: var(--on-ink); }   /* fond noir -> eyebrow + filet clairs */
.cta-band h2 { color: var(--on-ink); }
.cta-band p { margin-top: 1rem; color: var(--on-ink-mut); max-width: 48ch; }

/* =====================================================================
   PAGE GÉNÉRIQUE (stubs)
   ===================================================================== */
.page-hero {
  position: relative;
  padding-block: calc(var(--header-h) + clamp(2.5rem, 6vw, 4.5rem)) clamp(2.5rem, 5vw, 4rem);
  /* Image de fond + overlay noir */
  background-image:
    linear-gradient(rgba(11, 12, 16, .58), rgba(11, 12, 16, .58)),
    url('../img/hero_ihb.avif');
  background-size: cover;
  background-position: center;
  color: #fff;
}
.page-hero h1 { margin-top: 1.2rem; max-width: 18ch; color: #fff; }
.page-hero .lead { margin-top: 1.4rem; max-width: 56ch; color: rgba(255,255,255,.86); }
.page-hero .eyebrow { color: #fff; }
.page-hero .arrow-link { color: #fff; border-color: rgba(255,255,255,.4); }
.page-hero .arrow-link:hover { color: #fff; border-color: #fff; }
.placeholder {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: clamp(2rem, 5vw, 3.5rem);
  color: var(--muted);
  background: var(--surface);
}

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer {
  margin-top: var(--section);
  background: var(--ink);
  color: var(--on-ink);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr auto;
  gap: clamp(2rem, 5vw, 4rem);
  padding-block: clamp(3rem, 6vw, 5rem);
}
.brand__mark--footer { color: var(--on-ink); font-size: 1.6rem; }
.site-footer__full { margin-top: .8rem; font-size: var(--step-sm); color: var(--on-ink); }
.site-footer__tagline { margin-top: .3rem; font-size: var(--step-sm); color: var(--on-ink-mut); }

.site-footer__nav ul { display: grid; gap: .7rem; }
.site-footer__nav a {
  font-size: var(--step-sm);
  color: var(--on-ink-mut);
  transition: color var(--t);
}
.site-footer__nav a:hover { color: var(--on-ink); }

.site-footer__contact a {
  font-size: var(--step-sm);
  color: var(--on-ink);
  border-bottom: 1px solid rgba(243,237,225,.25);
  padding-bottom: 2px;
  transition: border-color var(--t);
}
.site-footer__contact a:hover { border-color: var(--accent); }

.site-footer__legal {
  border-top: 1px solid rgba(243,237,225,.12);
  padding-block: 1.6rem;
}
.site-footer__legal p { font-size: var(--step-xs); color: var(--on-ink-mut); }

/* =====================================================================
   CONTACT
   ===================================================================== */
.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
}
.contact__block h2 { font-size: var(--step-2); margin-bottom: 1.1rem; }
.contact__addr {
  font-style: normal;
  font-size: var(--step-1);
  line-height: 1.7;
  color: var(--ink-2);
}
.contact__addr strong { color: var(--ink); font-weight: 500; }
.contact__lines { margin-top: 1.4rem; display: grid; gap: .45rem; }
.contact__lines li { display: flex; gap: .8rem; font-size: var(--step-sm); color: var(--ink-2); }
.contact__lines span { color: var(--muted); min-width: 3rem; }
.contact__lines a { color: var(--ink-2); transition: color var(--t); }
.contact__lines a:hover { color: var(--ink); }
.contact__mail { display: grid; gap: .6rem; }
.contact__mail a {
  font-size: var(--step-1);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  width: max-content;
  max-width: 100%;
  transition: border-color var(--t);
}
.contact__mail a:hover { border-color: var(--accent); }
.contact__note {
  margin-top: 1.6rem;
  padding: 1.2rem 1.4rem;
  background: var(--surface-2);
  border-radius: var(--radius);
  font-size: var(--step-sm);
  color: var(--ink-2);
  line-height: 1.6;
}
@media (max-width: 720px) {
  .contact { grid-template-columns: 1fr; }
}

/* =====================================================================
   ANIMATIONS — reveal au scroll
   ===================================================================== */
[data-reveal] {
  opacity: 0;
  transition: opacity .8s cubic-bezier(.8, 0, 0, .7);
}
[data-reveal].is-in { opacity: 1; }
[data-reveal][data-reveal-delay="1"] { transition-delay: .08s; }
[data-reveal][data-reveal-delay="2"] { transition-delay: .16s; }
[data-reveal][data-reveal-delay="3"] { transition-delay: .24s; }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .editorial__grid { grid-template-columns: 1fr; }
  .editorial__head { position: static; }
  .cta-band { padding-right: clamp(2.6rem, 6vw, 5rem); }
  .cta-band::after { display: none; }
  .pillars__grid { grid-template-columns: 1fr; }
  .pillar + .pillar { border-left: 0; border-top: 1px solid var(--line); }

  /* En-tête mobile : collé au top, burger à gauche, logo centré, langue à droite */
  .site-header { top: 0; }
  .site-header__inner { position: relative; border-radius: 0; }
  .nav-toggle { order: -1; }
  .brand { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); }
  .lang-switch { margin-left: auto; }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    width: 44px; height: 44px;
    border: 1px solid var(--line);
    border-radius: 10px;
  }
  .nav-toggle__bar,
  .nav-toggle__bar::before,
  .nav-toggle__bar::after {
    content: "";
    display: block;
    width: 20px; height: 1.5px;
    margin-inline: auto;
    background: var(--ink);
    transition: transform .3s var(--ease), opacity .2s var(--ease);
  }
  .nav-toggle__bar { position: relative; }
  .nav-toggle__bar::before { position: absolute; top: -6px; left: 0; }
  .nav-toggle__bar::after  { position: absolute; top: 6px;  left: 0; }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar::after  { transform: translateY(-6px) rotate(-45deg); }

  .nav {
    position: fixed;
    inset: 78px 0 auto 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 1rem var(--gutter) 1.6rem;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--t), opacity var(--t), visibility var(--t);
    box-shadow: 0 24px 40px -28px rgba(22,19,16,.5);
  }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__link {
    display: block;
    padding: .9rem 0;
    border-bottom: 1px solid var(--line-soft);
    font-size: var(--step-1);
  }
  .nav__link::after { display: none; }

  .stats { grid-template-columns: 1fr; }
  .stat + .stat { border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .site-footer__inner { display: flex; flex-wrap: wrap; }
  .lead { font-size: var(--step-0); }
}

@media (max-width: 540px) {
  .brand__name { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}