/* ============================================================
   HEADER — High-End Corporate Redesign
   ============================================================ */

/* ── Base ── */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 9600; /* above overlay(9500) so hamburger stays clickable */
    transition: box-shadow 0.4s ease, background-color 0.4s ease;
}

/* ── Mobile Overlay Backdrop (injected by JS) ── */
.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9500;
    background: rgba(5, 17, 31, 0.58);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    cursor: pointer;
    animation: fadeOverlay 0.3s ease forwards;
}

.mobile-overlay.is-active {
    display: block;
}

@keyframes fadeOverlay {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ── Utility Top Bar ── */
.top-bar {
    background-color: var(--clr-primary);
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.top-bar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

.top-bar-region {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.55);
    text-transform: uppercase;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.top-bar-right a {
    font-size: 0.72rem;
    letter-spacing: 0.3px;
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    transition: color 0.2s;
}

.top-bar-right a:hover {
    color: #fff;
}

.top-bar-divider {
    width: 1px;
    height: 10px;
    background-color: rgba(255, 255, 255, 0.15);
}

/* ── Main Navigation Bar ── */
.main-nav {
    background-color: #ffffff;
    border-bottom: 1px solid rgba(10, 25, 47, 0.07);
    transition: background-color 0.3s, box-shadow 0.3s;
}

.site-header.scrolled .main-nav {
    box-shadow: 0 4px 24px rgba(10, 25, 47, 0.10);
}

.main-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    height: 72px;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ── Logo ── */
.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-logo-img {
    height: 38px;
    width: auto;
    display: block;
}

/* ── Nav List ── */
.nav-list {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none;
    padding: 0;
    margin: 0;
    height: 100%;
}

.nav-item {
    position: static;
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0 1.25rem;
    height: 100%;
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.2px;
    color: var(--clr-primary);
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

.nav-link:hover,
.nav-item.has-mega:hover .nav-link {
    color: var(--clr-secondary);
    border-bottom-color: var(--clr-secondary);
}

.nav-arrow {
    transition: transform 0.25s ease;
    opacity: 0.5;
    flex-shrink: 0;
}

.nav-item.has-mega:hover .nav-arrow {
    transform: rotate(180deg);
    opacity: 1;
}

/* ── Mega Menu Panel ── */
.mega-panel {
    position: fixed;
    top: calc(40px + 72px); /* top-bar + main-nav */
    left: 0;
    width: 100%;
    background-color: #ffffff;
    border-top: 2px solid var(--clr-secondary);
    border-bottom: 1px solid rgba(10, 25, 47, 0.08);
    box-shadow: 0 20px 60px rgba(10, 25, 47, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    pointer-events: none;
    z-index: 8999;
}

.nav-item.has-mega:hover .mega-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

/* Invisible bridge so mouse hovering doesn't drop off */
.mega-panel::before {
    content: '';
    position: absolute;
    top: -30px;
    left: 0;
    width: 100%;
    height: 30px;
    background: transparent;
}

.mega-panel-inner {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 4rem;
    padding: 3rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.mega-intro {
    border-right: 1px solid var(--clr-border);
    padding-right: 4rem;
}

.mega-eyebrow {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--clr-secondary);
    margin-bottom: 0.75rem;
}

.mega-intro h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--clr-primary);
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.mega-intro p {
    font-size: 0.9rem;
    color: var(--clr-text-main);
    line-height: 1.6;
    opacity: 0.8;
    margin: 0;
}

.mega-explore-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--clr-primary, #000);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.mega-explore-link svg {
    transition: transform 0.25s ease;
}

.mega-explore-link:hover {
    opacity: 0.7;
}

.mega-explore-link:hover svg {
    transform: translateX(4px);
}

.mega-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.25rem;
    align-content: start;
}

.mega-link-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: background-color 0.2s;
}

.mega-link-item:hover {
    background-color: var(--clr-bg-alt);
}

.mega-link-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--clr-primary);
    transition: color 0.2s;
}

.mega-link-item:hover .mega-link-title {
    color: var(--clr-secondary);
}

.mega-link-desc {
    font-size: 0.78rem;
    color: var(--clr-text-main);
    opacity: 0.65;
}

/* ── Header Actions ── */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.nav-search-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--clr-primary);
    display: flex;
    align-items: center;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s;
}

.nav-search-btn:hover {
    background-color: var(--clr-bg-alt);
}

.nav-cta {
    background-color: var(--clr-primary, #000);
    color: #fff !important;
    padding: 0.65rem 1.5rem;
    font-size: 0.8rem !important;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 1px solid var(--clr-primary, #000);
    transition: all 0.3s ease;
    border-radius: 0;
    text-decoration: none;
    white-space: nowrap;
}

.nav-cta:hover {
    background-color: #fff;
    color: var(--clr-primary, #000) !important;
}

/* ── Search Modal ── */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.98);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.search-modal.is-active {
    opacity: 1;
    visibility: visible;
}

.search-modal-inner {
    position: relative;
    width: 100%;
    max-width: 900px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

.header-search-form {
    display: flex;
    border-bottom: 2px solid #000;
    padding-bottom: 0.5rem;
}

.header-search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 300;
    color: #000;
    outline: none;
}

.header-search-input::placeholder {
    color: #bbb;
}

.header-search-form .btn-primary {
    background: transparent;
    color: #000;
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    padding: 0 1rem;
    cursor: pointer;
}

.header-search-form .btn-primary:hover {
    color: #555;
    background: transparent;
}

.close-search-btn {
    position: absolute;
    top: -50px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: #000;
    transition: transform 0.2s;
}

.close-search-btn:hover {
    transform: scale(1.1);
}

/* ── Mobile Hamburger ── */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    width: 42px;
    height: 42px;
    position: relative;
    z-index: 10100;
    flex-shrink: 0;
}

.mobile-menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--clr-primary);
    border-radius: 2px;
    transition: transform 0.35s cubic-bezier(0.23, 1, 0.32, 1),
                opacity   0.25s ease,
                width     0.25s ease;
    transform-origin: center;
}

/* Animated hamburger → X */
.menu-is-open .mobile-menu-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.menu-is-open .mobile-menu-toggle span:nth-child(2) {
    opacity: 0;
    width: 0;
}
.menu-is-open .mobile-menu-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Scroll State ── */
.site-header.scrolled .top-bar {
    display: none;
}

.site-header.scrolled .mega-panel {
    top: 72px;
}

/* ── 1100px Tablet ── */
@media (max-width: 1100px) {
    .nav-link {
        padding: 0 0.9rem;
    }
    .mega-panel-inner {
        grid-template-columns: 240px 1fr;
        gap: 2.5rem;
    }
}

/* ── 960px — Switch to mobile drawer ── */
@media (max-width: 960px) {

    /* Hide desktop items */
    .top-bar-right,
    .nav-search-btn,
    .nav-cta {
        display: none;
    }

    /* Show hamburger */
    .mobile-menu-toggle {
        display: flex;
    }

    /* ── Mobile Drawer ── */
    /* Note: JS moves .primary-nav from <header> to <body> so it
       escapes the header stacking context and sits at z-index 9700
       directly in the root stacking context. */
    .primary-nav {
        position: fixed;
        top: 0;
        right: 0;
        width: min(340px, 88vw);
        height: 100dvh;
        background-color: #ffffff;
        border-left: 1px solid var(--clr-border);
        box-shadow: -12px 0 48px rgba(10, 25, 47, 0.18);
        z-index: 9700; /* above header(9600) and overlay(9500) */
        overflow-y: auto;
        overscroll-behavior: contain;
        padding: 5rem 0 3rem;
        transform: translateX(110%);
        transition: transform 0.42s cubic-bezier(0.23, 1, 0.32, 1);
        display: block !important;
    }

    .menu-is-open .primary-nav {
        transform: translateX(0);
    }

    /* ── Drawer nav list ── */
    .nav-list {
        flex-direction: column;
        align-items: stretch;
        height: auto;
        gap: 0;
    }

    .nav-item {
        height: auto;
        flex-direction: column;
        align-items: stretch;
        border-bottom: 1px solid var(--clr-border);
    }

    .nav-link {
        padding: 1.1rem 1.5rem;
        height: auto;
        font-size: 1rem;
        color: var(--clr-primary);
        border-bottom: none;
        display: flex;
        justify-content: space-between;
        width: 100%;
    }

    .nav-link:hover,
    .nav-item.has-mega:hover .nav-link {
        color: var(--clr-secondary);
        border-bottom-color: transparent;
        background-color: var(--clr-bg-alt);
    }

    /* ── Accordion sub-menu ── */
    .mega-panel {
        /* Override the fixed/absolute desktop panel */
        position: static !important;
        width: 100% !important;
        background-color: var(--clr-bg-alt);
        border-top: 1px solid var(--clr-border);
        border-bottom: none;
        box-shadow: none;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        pointer-events: auto !important;
        display: none; /* toggled by JS .is-open */
        z-index: auto;
    }

    .nav-item.is-open .mega-panel {
        display: block;
    }

    .nav-item.is-open .nav-arrow {
        transform: rotate(180deg);
        opacity: 1;
    }

    .mega-panel-inner {
        display: flex;
        flex-direction: column;
        gap: 0;
        padding: 0;
        max-width: none;
    }

    /* Hide the big intro column on mobile */
    .mega-intro {
        display: none;
    }

    .mega-links {
        display: flex;
        flex-direction: column;
        gap: 0;
    }

    .mega-link-item {
        padding: 0.9rem 1.75rem;
        border-radius: 0;
        border-bottom: 1px solid rgba(10, 25, 47, 0.05);
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .mega-link-item:last-child {
        border-bottom: none;
    }

    .mega-link-desc {
        display: none; /* Keep mobile drawer clean */
    }

    .mega-link-title {
        font-size: 0.88rem;
    }

    /* Prevent body scroll when menu open */
    body.menu-is-open {
        overflow: hidden;
    }
}

/* ── 480px extra small ── */
@media (max-width: 480px) {
    .logo-tagline {
        display: none;
    }

    .main-nav-inner {
        padding: 0 1rem;
    }
}