/* Mobile menu — overlay, layout and accessibility
   - Works inside .header-mobile
   - Uses --vh (set by JS) to match real mobile viewport height
   - Keeps desktop mega-menu untouched (scoped to .header-mobile) */

/* Fullscreen overlay state */
.header-mobile.menu-open {
    position: fixed;            /* lock header-mobile to viewport */
    inset: 0;                   /* top/right/bottom/left = 0 */
    z-index: 9999;              /* above site content */
}

/* Visible overlay container */
.header-mobile.menu-open .nav-open {
    display: flex !important;   /* override inline display:none */
    opacity: 1 !important;      /* override inline opacity:0 */
    position: fixed !important; /* overlay covers viewport */
    inset: 0 !important;
    z-index: 9999 !important;
    pointer-events: auto !important;
}

/* Inner panel sizing/scrollability */
.header-mobile.menu-open .div-menu {
    opacity: 1 !important;      /* ensure visible */
    flex: 1 1 auto;
    width: 100% !important;
    height: 100% !important;
    overflow: auto !important;  /* scrolling content inside overlay */
}

/* Base structure */
.header-mobile {
    .nav-open {
        display: none;
        flex-direction: column;
        /* Real mobile viewport height; falls back to 100vh if JS not applied */
        min-height: calc(var(--vh, 1vh) * 100);
    }

    .navigation-3,
    .nav-opened {
        max-width: none;
        width: 100%;
    }

    /* Hide siblings of .nav-open when menu is open (visual focus) */
    &.menu-open > *:not(.nav-open) {
        visibility: hidden;
        pointer-events: none;
        user-select: none;
        opacity: 0;
    }

    /* Sticky top bar inside the overlay */
    .nav-open .navbar-mobile {
        position: sticky;
        top: 0;
        z-index: 1;
        flex: 0 0 auto;
    }

    /* Wrapper column (avoid transforms to prevent Safari paint issues) */
    .nav-open .div-menu {
        display: flex;
        flex-direction: column;
        flex: 1 1 auto;
        width: 100%;
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        transform: none !important;    /* neutralize inline translateY(...) */
    }

    /* The only scroll container */
    .nav-opened {
        display: flex;
        flex-direction: column;
        flex: 1 1 auto;
        min-height: 0;                 /* allow child to scroll */
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;

        /* Avoid overlap with iOS home indicator/toolbars */
        padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
        scroll-padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));

        > * {
            flex-shrink: 0;            /* prevent frame compression */
        }
    }

    /* Footer languages: last row, in-flow (not fixed) */
    .lang-mobile {
        order: 9999;                   /* ensure last inside .nav-opened */
        margin-top: auto;              /* push to bottom when content is short */
        align-self: flex-start;        /* bottom-left alignment */
        width: 100%;
        display: flex;
        flex: 0 0 auto;
        position: static;
        padding: 8px 0 calc(8px + env(safe-area-inset-bottom, 0px));
        padding-left: 32px;
        padding-right: 32px;
    }

    /* Accordion visibility */
    .item-content { display: none; }
    .item-content.is-open { display: block; }

    /* Closed header fade/shift */
    .nav-close {
        transition: opacity 180ms ease, transform 180ms ease;
    }
    &.menu-open .nav-close {
        opacity: 0;
        transform: translateY(-6px);
        pointer-events: none;
    }
}

/* Reduced motion: disable transitions/scroll effects */
@media (prefers-reduced-motion: reduce) {
    .header-mobile {
        .nav-open,
        .nav-open .div-menu,
        .nav-open .nav-opened {
            transition: none;
            scroll-behavior: auto;
        }
    }
}

/* Normalize UA margins for consistent overlay fit */
html, body { margin: 0; }