/* ==========================================================================
   LLM ECO — COMPONENTS : header, navigation, menu mobile, footer
   ========================================================================== */

/* ============================ HEADER ============================ */
/* ===== HEADER EN BANDE CLAIRE (logo mis en valeur, sticky) ===== */
:root {
  --hd-ink: #0b1530;      /* texte fort sur bande claire */
  --hd-muted: #475274;    /* liens */
  --hd-line: rgba(11, 21, 48, 0.10);
}
.site-header {
  position: fixed; inset: 0 0 auto 0;
  z-index: var(--z-header);
  height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(247, 249, 253, 0.88);
  backdrop-filter: blur(16px) saturate(1.1); -webkit-backdrop-filter: blur(16px) saturate(1.1);
  border-bottom: 1px solid var(--hd-line);
  transition: background var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              height var(--dur-base) var(--ease-out);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-5); width: 100%; }

/* renforcement au scroll (la bande suit, plus marquée) */
.site-header.is-scrolled {
  background: rgba(250, 251, 254, 0.94);
  box-shadow: 0 6px 24px rgba(8, 16, 38, 0.10);
  height: 64px;
}

.brand { display: inline-flex; align-items: center; flex-shrink: 0; }
.brand__logo { height: 42px; width: auto; transition: height var(--dur-base) var(--ease-out); }
.is-scrolled .brand__logo { height: 36px; }

/* ---- Nav desktop ---- */
.nav-desktop__list { display: flex; align-items: center; gap: var(--sp-2); }
.nav-link {
  position: relative;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0.5rem 0.85rem;
  font-family: var(--font-display); font-weight: 600; font-size: var(--fs-sm);
  color: var(--hd-muted);
  border-radius: var(--r-sm);
  transition: color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.nav-link:hover, .nav-link.is-active { color: var(--hd-ink); background: rgba(11, 21, 48, 0.04); }
.nav-link.is-active::after {
  content: ""; position: absolute; left: 0.85rem; right: 0.85rem; bottom: 2px;
  height: 2px; border-radius: 2px; background: var(--grad-brand);
}
.nav-caret { transition: transform var(--dur-fast) var(--ease-out); }

/* ---- Méga-menu "Nos solutions" ---- */
.has-menu { position: relative; }
.mega {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(8px);
  width: min(380px, 90vw);
  background: #ffffff;
  border: 1px solid var(--hd-line); border-radius: var(--r-lg);
  padding: var(--sp-3); box-shadow: 0 24px 60px rgba(8, 16, 38, 0.18);
  display: grid; gap: 4px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out), visibility var(--dur-base);
}
.has-menu:hover .mega, .has-menu:focus-within .mega, .mega.is-open {
  opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(-50%) translateY(0);
}
.has-menu:hover .nav-caret, .has-menu:focus-within .nav-caret { transform: rotate(180deg); }
.mega__item { display: grid; gap: 2px; padding: 0.7rem 0.9rem; border-radius: var(--r-sm); transition: background var(--dur-fast) var(--ease-out); }
.mega__item:hover { background: #eef3fb; }
.mega__title { font-family: var(--font-display); font-weight: 600; color: var(--hd-ink); font-size: var(--fs-sm); }
.mega__desc { font-size: var(--fs-xs); color: var(--hd-muted); }
.mega__all { padding: 0.6rem 0.9rem; margin-top: 4px; border-top: 1px solid var(--hd-line); color: var(--brand-blue-600); font-weight: 600; font-size: var(--fs-sm); }

.site-header__actions { display: flex; align-items: center; gap: var(--sp-3); flex-shrink: 0; }

/* ---- Burger ---- */
.burger { display: none; width: 44px; height: 44px; border-radius: var(--r-sm); flex-direction: column; align-items: center; justify-content: center; gap: 5px; border: 1px solid var(--hd-line); background: rgba(11,21,48,0.03); }
.burger span { width: 20px; height: 2px; background: var(--hd-ink); border-radius: 2px; transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-fast); }
.burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================ MENU MOBILE (overlay plein écran slide-right) ============================ */
.mobile-menu {
  position: fixed; inset: 0 0 0 auto; z-index: var(--z-overlay);
  width: min(420px, 100%);
  background: linear-gradient(160deg, var(--ink-850), var(--ink-1000));
  border-left: 1px solid var(--line-strong);
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-in-out);
  overflow-y: auto; visibility: hidden;
}
.mobile-menu.is-open { transform: translateX(0); visibility: visible; }
.mobile-menu__panel { padding: calc(var(--header-h) + var(--sp-4)) var(--gutter) var(--sp-7); }
.mobile-nav { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav__label { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: var(--tracking-caps); color: var(--brand-cyan-400); margin-top: var(--sp-5); margin-bottom: var(--sp-1); font-weight: 600; }
.mobile-nav__label:first-child { margin-top: 0; }
/* items sans traits ni flèches : juste de l'espace et un fond au survol */
.mobile-nav a { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; color: var(--text-base); padding: 0.7rem 0.9rem; border-radius: var(--r-sm); transition: color var(--dur-fast), background var(--dur-fast); }
.mobile-nav a:hover, .mobile-nav a:focus-visible { color: var(--brand-cyan-300); background: rgba(141,178,255,0.07); }
.mobile-nav__sub { font-size: 0.98rem !important; color: var(--text-muted) !important; }
.mobile-nav__cta { margin-top: var(--sp-6); color: #fff !important; justify-content: center; }
.mobile-nav__cta:hover { background: none !important; }

.mobile-backdrop { position: fixed; inset: 0; z-index: calc(var(--z-overlay) - 1); background: rgba(2,4,9,0.6); backdrop-filter: blur(2px); opacity: 0; transition: opacity var(--dur-base); }
.mobile-backdrop.is-open { opacity: 1; }
body.menu-open { overflow: hidden; }

/* ============================ FOOTER ============================ */
.site-footer { margin-top: var(--section-y); border-top: 1px solid var(--line); background: linear-gradient(180deg, var(--ink-950), var(--ink-1000)); }
.footer-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--sp-6); padding-block: var(--section-y); }
.footer-cta__text { max-width: 620px; }
.footer-cta__title { font-size: var(--fs-h2); margin-top: var(--sp-3); margin-bottom: var(--sp-4); }
.footer-cta__actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); }

.footer-grid { display: grid; grid-template-columns: 1.5fr 0.9fr 0.9fr 1.6fr; gap: var(--sp-7) var(--sp-6); padding-block: var(--sp-8) var(--sp-7); }
.footer-brand__logo { margin-bottom: var(--sp-4); }
.footer-brand__desc { color: var(--text-muted); font-size: var(--fs-sm); max-width: 38ch; }
.footer-brand__sign { margin-top: var(--sp-4); font-family: var(--font-display); font-style: italic; color: var(--brand-cyan-300); }
.footer-col { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer-col__title { font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: var(--tracking-wide); color: var(--text-faint); margin-bottom: var(--sp-1); }
.footer-col a { color: var(--text-muted); font-size: var(--fs-sm); transition: color var(--dur-fast); width: fit-content; }
.footer-col a:hover { color: var(--brand-cyan-300); }
/* lignes de contact avec icône */
.footer-contact { gap: var(--sp-4); }
.footer-contact__row { display: flex; align-items: flex-start; gap: var(--sp-3); color: var(--text-muted); font-size: var(--fs-sm); line-height: 1.5; }
.footer-contact__row strong { color: var(--text-base); }
a.footer-contact__row { width: 100%; transition: color var(--dur-fast); }
a.footer-contact__row:hover { color: var(--brand-cyan-300); }
.footer-contact__ic { flex-shrink: 0; width: 34px; height: 34px; border-radius: var(--r-sm); display: grid; place-items: center; color: var(--brand-cyan-300); background: rgba(6,187,249,0.10); border: 1px solid rgba(6,187,249,0.18); }
.footer-social__label { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: var(--tracking-wide); color: var(--text-faint); margin-top: var(--sp-2); }
.footer-social { display: flex; gap: var(--sp-2); margin-top: var(--sp-1); }
.footer-social__ic { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: var(--r-sm); border: 1px solid var(--line); color: var(--text-faint); background: var(--surface-1); transition: color var(--dur-fast), border-color var(--dur-fast); }
.footer-social__ic:hover { color: var(--brand-cyan-300); border-color: var(--line-strong); }
.footer-brand__logo-link { display: inline-block; width: fit-content; border-radius: var(--r-md); transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); }
.footer-brand__logo-link:hover { opacity: 0.85; transform: translateY(-2px); }

.footer-bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--sp-3); padding-block: var(--sp-5); border-top: 1px solid var(--line); color: var(--text-faint); font-size: var(--fs-sm); }
.footer-legal { display: flex; flex-wrap: wrap; gap: var(--sp-5); }
.footer-legal a { color: var(--text-faint); transition: color var(--dur-fast); }
.footer-legal a:hover { color: var(--text-base); }

/* ============================ BANDE VIDÉO RÉUTILISABLE (showband) ============================ */
.showband { position: relative; min-height: clamp(380px, 56vh, 600px); display: flex; align-items: center; overflow: hidden; margin-block: var(--sp-2); }
.showband__media { position: absolute; inset: 0; z-index: 0; }
.showband__media .pic, .showband__media img, .showband__video { width: 100%; height: 100%; object-fit: cover; }
.showband__video { position: absolute; inset: 0; }
.showband__overlay { position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(90deg, rgba(2,4,9,0.94) 0%, rgba(2,4,9,0.74) 48%, color-mix(in srgb, var(--t-accent, #1e3ad0) 28%, transparent) 100%); }
.showband--rev .showband__content { margin-left: auto; text-align: right; }
.showband--rev .showband__overlay { background: linear-gradient(270deg, rgba(2,4,9,0.94) 0%, rgba(2,4,9,0.74) 48%, color-mix(in srgb, var(--t-accent, #1e3ad0) 28%, transparent) 100%); }
.showband--rev .showband__points { justify-content: flex-end; }
.showband__content { position: relative; z-index: 2; max-width: 720px; padding-block: var(--sp-7); }
.showband__content .eyebrow { margin-bottom: var(--sp-3); }
.showband__content h2 { font-size: var(--fs-h1); margin-bottom: var(--sp-4); }
.showband__points { display: flex; flex-wrap: wrap; gap: var(--sp-5) var(--sp-6); margin-top: var(--sp-6); list-style: none; padding: 0; }
.showband__points li { display: flex; flex-direction: column; gap: 3px; max-width: 210px; padding-left: var(--sp-4); border-left: 2px solid var(--t-accent, var(--brand-cyan-500)); text-align: left; }
.showband__points b { font-family: var(--font-display); color: var(--text-strong); }
.showband__points span { color: var(--text-muted); font-size: var(--fs-sm); }
@media (max-width: 640px) { .showband--rev .showband__content { text-align: left; } .showband--rev .showband__points { justify-content: flex-start; } }

/* ============================ RETOUR EN HAUT ============================ */
.to-top {
  position: fixed; right: clamp(1rem, 3vw, 2rem); bottom: clamp(1rem, 3vw, 2rem);
  z-index: var(--z-header);
  width: 48px; height: 48px; border-radius: var(--r-pill);
  display: grid; place-items: center;
  background: var(--grad-brand); color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow: 0 10px 30px rgba(6,187,249,0.35);
  cursor: pointer; transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.to-top[hidden] { display: none; }
.to-top:hover { transform: translateY(-3px); }

/* ============================ BANDEAU COOKIES ============================ */
.cookie[hidden] { display: none; }
.cookie {
  position: fixed; left: 50%; bottom: clamp(0.8rem, 2vw, 1.4rem); transform: translateX(-50%);
  z-index: var(--z-modal); width: min(960px, calc(100% - 2rem));
  background: linear-gradient(160deg, var(--surface-2), var(--ink-950));
  border: 1px solid var(--line-strong); border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg); animation: cookieUp var(--dur-slow) var(--ease-out);
}
@keyframes cookieUp { from { opacity: 0; transform: translate(-50%, 16px); } to { opacity: 1; transform: translate(-50%, 0); } }
.cookie__inner { display: flex; align-items: center; gap: var(--sp-5); padding: var(--sp-5) var(--sp-6); flex-wrap: wrap; }
.cookie__text { flex: 1 1 380px; }
.cookie__title { font-family: var(--font-display); font-weight: 700; color: var(--text-strong); margin-bottom: 4px; }
.cookie__text p { color: var(--text-muted); font-size: var(--fs-sm); max-width: 64ch; }
.cookie__text a { color: var(--brand-cyan-300); text-decoration: underline; }
.cookie__opts[hidden] { display: none; }
.cookie__opts { display: flex; flex-wrap: wrap; gap: var(--sp-3) var(--sp-5); margin-top: var(--sp-4); }
.cookie__opt { display: flex; align-items: center; gap: var(--sp-2); font-size: var(--fs-sm); color: var(--text-base); cursor: pointer; }
.cookie__opt input { accent-color: var(--brand-cyan-500); width: 17px; height: 17px; }
.cookie__opt em { color: var(--text-faint); font-style: normal; }
.cookie__actions { display: flex; gap: var(--sp-2); flex-wrap: wrap; align-items: center; }
.cookie__actions .btn { padding: 0.7rem 1.1rem; font-size: var(--fs-sm); }

/* ============================ RESPONSIVE ============================ */
@media (max-width: 640px) {
  .cookie__inner { padding: var(--sp-4); }
  .cookie__actions { width: 100%; }
  .cookie__actions .btn { flex: 1; justify-content: center; }
}
@media (max-width: 980px) {
  .nav-desktop, .header-cta { display: none; }
  .burger { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-cta { flex-direction: column; align-items: flex-start; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}