/* =========================================================
   Header, navigation, recherche, footer
   ========================================================= */

.site-header {
    position: sticky; top: 0; z-index: 100;
    background: #fff; border-bottom: 1px solid var(--border-soft);
}
.site-header__inner { display: flex; align-items: center; height: var(--header-h); gap: 24px; }

/* Logo */
.logo { display: inline-flex; align-items: center; gap: 10px; flex: none; }
.logo__img { display: block; width: auto; height: 50px; }

/* Navigation desktop */
.nav-desktop { flex: 1; display: flex; justify-content: center; }
.nav-desktop__list { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 14px; border: 0; background: transparent; border-radius: 8px;
    font-size: 14px; font-weight: 500; color: var(--text-primary);
}
.nav-link:hover, .nav-link.is-active, .nav-link[aria-expanded="true"] { color: var(--bisoft-blue); }
.nav-link .icon { transition: transform .15s; }
.nav-link[aria-expanded="true"] .icon { transform: rotate(180deg); }

.mega {
    position: absolute; left: 50%; top: calc(100% + 14px); transform: translateX(-30%);
    width: 620px; padding: 16px; background: #fff;
    border: 1px solid var(--border-soft); border-radius: var(--radius-md); box-shadow: var(--shadow-card);
}
.mega__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px; }
.mega__item { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 12px; }
.mega__item:hover { background: var(--tone-soft); }
.mega__item strong { display: block; font-size: 14.5px; }
.mega__item small { display: block; font-size: 12.5px; color: var(--text-muted); }
.mega__all {
    display: flex; align-items: center; gap: 6px; margin-top: 8px; padding: 12px;
    border-top: 1px solid var(--border-soft); font-size: 13.5px; font-weight: 600; color: var(--bisoft-blue);
}

.site-header__actions { display: flex; align-items: center; gap: 14px; margin-left: auto; }
.nav-burger { display: none; }

/* Navigation mobile */
.nav-mobile { border-top: 1px solid var(--border-soft); background: #fff; max-height: calc(100vh - var(--header-h)); overflow-y: auto; padding-block: 8px 20px; }
.nav-mobile__link {
    display: flex; width: 100%; align-items: center; justify-content: space-between;
    min-height: 52px; padding: 0; border: 0; background: transparent;
    font-size: 17px; font-weight: 600; border-bottom: 1px solid var(--border-soft);
}
.nav-mobile__sub { padding: 6px 0 10px 4px; }
.nav-mobile__sub a { display: flex; align-items: center; gap: 12px; min-height: 48px; font-weight: 500; }
.nav-mobile__cta { display: grid; gap: 10px; margin-top: 18px; }

/* Recherche */
.search-overlay {
    position: fixed; inset: 0; z-index: 300; background: rgba(10, 26, 56, .45);
    display: flex; align-items: flex-start; justify-content: center; padding: 12vh 16px 16px;
}
.search-box { width: min(640px, 100%); background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-float); overflow: hidden; }
.search-box__form { display: flex; align-items: center; gap: 12px; padding: 14px 16px; color: var(--text-muted); }
.search-box__form input { flex: 1; min-width: 0; border: 0; outline: 0; font-size: 18px; color: var(--text-primary); background: transparent; }
.search-box__results { border-top: 1px solid var(--border-soft); max-height: 50vh; overflow-y: auto; }
.search-box__results:empty { display: none; }
.search-box__results a { display: grid; gap: 2px; padding: 12px 20px; }
.search-box__results a:hover, .search-box__results a:focus-visible { background: var(--background-soft); }
.search-box__results strong { font-size: 15px; }
.search-box__results small { color: var(--text-muted); font-size: 13px; }
.search-box__results .search-empty { padding: 16px 20px; color: var(--text-muted); font-size: 14px; }

/* Footer */
.site-footer { background: var(--background-soft); border-top: 1px solid var(--border-soft); padding-top: 56px; }
.site-footer__grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(5, minmax(0, 1fr)); gap: 32px; padding-bottom: 40px; }
.site-footer__brand p { margin-top: 14px; max-width: 260px; font-size: 14px; color: var(--text-secondary); }
.site-footer__col h2 { font-size: 13px; font-weight: 700; letter-spacing: .04em; margin-bottom: 14px; }
.site-footer__col li + li { margin-top: 10px; }
.site-footer__col a { font-size: 14px; color: var(--text-secondary); }
.site-footer__col a:hover { color: var(--bisoft-blue); }
.site-footer__bottom {
    display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
    padding-block: 22px; border-top: 1px solid var(--border-soft); font-size: 13.5px; color: var(--text-secondary);
}
.site-footer__bottom a { font-weight: 600; color: var(--bisoft-blue); }

/* ---------- Responsive ---------- */
@media (max-width: 1099px) {
    .nav-desktop { display: none; }
    .nav-burger { display: inline-grid; }
}
@media (min-width: 1100px) {
    .nav-mobile { display: none !important; }
}
@media (max-width: 1279px) {
    .site-footer__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .site-footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 767px) {
    .logo__img { height: 42px; }
    .site-header__cta { display: none; }
    .site-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}