/* ============================================================
   IMASCIENCE — Composants : header sombre, mega menus blancs,
   boutons, icônes, footer sombre (maquette Framer Cléa)
   ============================================================ */

/* ---------- Accents de titres : *mot* → em italique magenta ---------- */
h1 em, h2 em, .section__head em {
  font-style: italic;
  color: var(--color-highlight);
}

/* ---------- Icônes ---------- */
.icon { width: 24px; height: 24px; flex: none; }
.icon--sm { width: 18px; height: 18px; }
.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  flex: none;
  border-radius: 14px;
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 8px 20px -8px color-mix(in srgb, var(--color-accent) 60%, transparent);
}
.megamenu .icon-badge { width: 40px; height: 40px; border-radius: 10px; }
.megamenu .icon-badge .icon { width: 20px; height: 20px; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8em 1.4em;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: var(--weight-semibold);
  font-size: var(--text-base);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}
.btn:hover { transform: translateY(-1px); }

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 14px 30px -10px color-mix(in srgb, var(--color-accent) 65%, transparent);
}
.btn--outline {          /* sur fond clair */
  border-color: color-mix(in srgb, var(--color-blue) 40%, transparent);
  color: var(--color-blue);
  background: var(--color-white);
}
.btn--outline-invert {   /* sur fond sombre */
  border-color: color-mix(in srgb, var(--color-white) 45%, transparent);
  color: var(--color-white);
  background: transparent;
}
.btn--header {           /* CTA du header : contour orange sur fond sombre */
  border-color: var(--color-accent);
  color: var(--color-white);
  background: transparent;
  font-size: var(--text-sm);
  padding: 0.6em 1.2em;
}
.btn--header .icon { color: var(--color-accent); }
.btn--header:hover { background: color-mix(in srgb, var(--color-accent) 15%, transparent); }

.cta-duo {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-6);
}
.cta-duo__main {
  display: grid;
  gap: var(--space-2);
  justify-items: center;
}
.cta-note { font-size: var(--text-sm); color: var(--color-ink-soft); }
.cta-tertiary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  text-decoration: none;
  color: var(--color-ink);
  margin-top: auto;
}
.cta-tertiary:hover { color: var(--color-accent); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-dark);
}
/* Sur la home, le header est un voile sombre translucide au-dessus de la vidéo */
.is-home .site-header {
  background: color-mix(in srgb, var(--color-dark) 55%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  min-height: 74px;
}
.site-header__logo { display: block; }
.site-header__logo img { height: 26px; width: auto; }
.site-header__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav { margin-left: auto; }
.site-nav__list {
  display: flex;
  gap: var(--space-8);
  list-style: none;
  padding: 0;
  margin: 0;
}
.site-nav__item { position: relative; }
.site-nav__item > a,
.site-nav__toggle {
  color: color-mix(in srgb, var(--color-white) 88%, transparent);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  text-decoration: none;
  padding-block: 26px;
  display: inline-block;
}
/* Libellé à sous-menu : un bouton (aucune page derrière), même habillage que les liens */
.site-nav__toggle {
  background: none;
  border: 0;
  padding-inline: 0;
  font-family: inherit;
  cursor: pointer;
}
.site-nav__item > a:hover,
.site-nav__item > a[aria-current],
.site-nav__toggle:hover,
.site-nav__toggle[aria-current] { color: var(--color-white); }

/* ---------- Mega menus (cartes blanches flottantes) ---------- */
.megamenu {
  position: absolute;
  top: 100%;
  left: 50%;
  translate: -50% 0;
  z-index: 60;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-fast) var(--ease-out),
              visibility 0s linear var(--duration-fast);
}
.site-nav__item.has-megamenu:hover .megamenu,
.site-nav__item.has-megamenu:focus-within .megamenu {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}
.megamenu__panel {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 60px -20px rgb(0 0 0 / 0.45);
  padding: var(--space-6);
}
.megamenu--with-visual .megamenu__panel {
  display: grid;
  grid-template-columns: 340px 360px;
  gap: var(--space-6);
  width: max-content;
}
.megamenu--cols .megamenu__panel { width: 720px; }
.megamenu--cols .megamenu__list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2) var(--space-6);
}
.megamenu__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}
.megamenu__item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  text-decoration: none;
}
.megamenu__item:hover { background: var(--color-bg); }
/* Secteurs prioritaires (Industrie, Pharma) : fond teinté + filet accent, sans écraser les autres */
.megamenu__item--featured {
  background: color-mix(in srgb, var(--color-accent) 6%, var(--color-white));
  border: 1px solid color-mix(in srgb, var(--color-accent) 22%, transparent);
}
.megamenu__item--featured:hover {
  background: color-mix(in srgb, var(--color-accent) 11%, var(--color-white));
}
.megamenu__title {
  display: block;
  font-weight: var(--weight-bold);
  color: var(--color-ink);
}
.megamenu__desc {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  line-height: var(--leading-snug);
  margin-top: 2px;
}
.megamenu__all {
  grid-column: 1;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid color-mix(in srgb, var(--color-ink) 10%, transparent);
  font-weight: var(--weight-bold);
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
}
.megamenu__all:hover { color: var(--color-accent); }
/* Images empilées (une par expertise), fondu vers celle de l'item survolé (main.js) */
.megamenu__visual {
  grid-row: 1 / 3;
  grid-column: 2;
  position: relative;
}
.megamenu__visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}
.megamenu__visual img.is-active { opacity: 1; }

/* ---------- Sélecteur de langue ---------- */
.lang-switcher {
  display: flex;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
}
.lang-switcher a {
  color: var(--color-white);
  text-decoration: none;
  opacity: 0.45;
}
.lang-switcher a[aria-current] { opacity: 1; }

/* ---------- Burger (mobile) ---------- */
.site-header__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: var(--space-2);
  cursor: pointer;
}
.site-header__burger span {
  width: 22px;
  height: 2px;
  background: var(--color-white);
}
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  clip-path: inset(50%);
  overflow: hidden;
}

@media (max-width: 1023.98px) {
  .site-header__actions .btn { display: none; }
}
@media (max-width: 809.98px) {
  .site-nav { display: none; }
  .site-header__burger { display: flex; }
  .site-nav.is-open {
    display: block;
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: var(--color-dark);
    padding: var(--space-4);
  }
  .site-nav.is-open .site-nav__list { flex-direction: column; gap: 0; }
  .site-nav.is-open .site-nav__item > a,
  .site-nav.is-open .site-nav__toggle {
    padding-block: var(--space-3);
    width: 100%;
    text-align: left;
  }
  .site-nav.is-open .megamenu { display: none; }
  /* Accordéon : le clic sur le libellé parent déplie la liste des sous-pages */
  .site-nav.is-open .site-nav__item.is-open .megamenu {
    display: block;
    position: static;
    translate: none;
    opacity: 1;
    visibility: visible;
    margin-bottom: var(--space-4);
  }
  .site-nav.is-open .megamenu__panel { width: 100%; }
  .site-nav.is-open .megamenu--cols .megamenu__list { grid-template-columns: 1fr; }
  .site-nav.is-open .megamenu__visual { display: none; }
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-dark);
  color: var(--color-white);
  margin-top: var(--space-16);
}
.site-footer__inner {
  display: grid;
  gap: var(--space-12);
  padding-block: var(--space-16);
}
@media (min-width: 810px) {
  .site-footer__inner { grid-template-columns: 1.5fr 1fr 1fr 1fr; }
}
.site-footer__logo { height: 30px; width: auto; }
.site-footer__contact {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.site-footer__contact li {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  color: color-mix(in srgb, var(--color-white) 85%, transparent);
}
.site-footer__contact .icon { margin-top: 2px; opacity: 0.9; }
.site-footer__contact a {
  color: inherit;
  text-decoration: none;
}
.site-footer__heading {
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-4);
}
.site-footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.site-footer__col a {
  color: color-mix(in srgb, var(--color-white) 75%, transparent);
  text-decoration: none;
}
.site-footer__col a:hover { color: var(--color-white); }
.site-footer__bar {
  background: var(--color-accent);
  color: var(--color-white);
  text-align: center;
  font-size: var(--text-sm);
  padding-block: var(--space-3);
}