/* ==============================================
   HEADER / NAVBAR — modernised mega menu (v3)
   ============================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: rgba(255,255,255,.85);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
            backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid transparent;
    transition: box-shadow .25s ease, background .25s ease, border-color .25s ease;
    overflow: visible;
}

.site-header.scrolled {
    background: rgba(255,255,255,.95);
    box-shadow: 0 6px 22px -14px rgba(15,23,42,.18);
    border-bottom-color: var(--color-border-light);
}

/* ── Nav container ── */
.navbar-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
    gap: var(--space-8);
    overflow: visible;
}

/* ── Logo ── */
.logo-wrap { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
.logo-wrap img.improx-logo {
    height: 40px; width: auto; display: block;
    transition: opacity var(--transition-fast);
}
.logo-wrap img.improx-logo:hover { opacity: .85; }
.custom-logo-link img { height: 42px; width: auto; }

/* ── Main nav ── */
.main-navigation {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.main-menu {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-menu-secondary { gap: var(--space-6); }

.main-menu li { position: relative; }

.main-menu li a {
    text-decoration: none;
    color: var(--color-navy);
    font-weight: 500;
    font-size: 0.9375rem;
    letter-spacing: -0.005em;
    padding: 0.55rem 0.85rem;
    border-radius: var(--radius-full);
    transition: color .18s ease, background .18s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.main-menu li a:hover,
.main-menu li.current-menu-item > a,
.menu-item-services-mega:focus-within > a {
    color: var(--color-primary);
    background: rgba(0,87,255,.06);
}

/* ── CTA button in nav ── */
.btn-quote {
    background: var(--color-primary) !important;
    color: var(--color-white) !important;
    padding: 0.65rem 1.35rem !important;
    border-radius: var(--radius-full);
    font-weight: 600 !important;
    font-size: 0.9rem !important;
    letter-spacing: -0.005em;
    box-shadow: 0 6px 18px -8px rgba(0,87,255,.55);
    transition: background .18s ease, transform .18s ease, box-shadow .18s ease !important;
    display: inline-flex !important;
    align-items: center;
    gap: 6px;
}
.btn-quote:hover {
    background: var(--color-primary-dark) !important;
    color: var(--color-white) !important;
    transform: translateY(-1px);
    box-shadow: 0 10px 24px -10px rgba(0,87,255,.65);
}

/* ── Mega trigger ── */
.menu-item-services-mega { position: static !important; }

.mega-caret {
    transition: transform .25s ease;
    color: currentColor;
    margin-left: 2px;
}
.menu-item-services-mega:hover .mega-caret,
.menu-item-services-mega:focus-within .mega-caret,
.menu-item-services-mega.is-open .mega-caret { transform: rotate(180deg); }

/* ── Mega dropdown ── */
.mega {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translate(-50%, 8px);
    width: min(1180px, calc(100vw - 32px));
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 30px 70px -20px rgba(15,23,42,.28), 0 8px 24px -12px rgba(15,23,42,.14);
    border: 1px solid var(--color-border-light);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
    z-index: var(--z-dropdown);
    overflow: hidden;
}

.menu-item-services-mega:hover .mega,
.menu-item-services-mega:focus-within .mega,
.menu-item-services-mega.is-open .mega {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate(-50%, 0);
}

.mega__inner {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 460px;
}

/* Left rail */
.mega__rail {
    background: #fff;
    border-right: 1px solid var(--color-border-light);
    padding: 18px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
}

.mega__rail-item {
    all: unset;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-navy);
    transition: background .15s ease, color .15s ease;
    position: relative;
}

.mega__rail-icon {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: #F8FAFC;
    box-shadow: 0 1px 2px rgba(15,23,42,.06);
    font-size: 15px;
    flex-shrink: 0;
    transition: transform .18s ease;
}

.mega__rail-label { flex: 1; }

.mega__rail-arrow {
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity .18s ease, transform .18s ease;
    color: var(--color-navy);
}

.mega__rail-item:hover,
.mega__rail-item.is-active {
    background: #F8FAFC;
    color: var(--color-navy);
    box-shadow: 0 1px 2px rgba(15,23,42,.06);
}

.mega__rail-item.is-active .mega__rail-arrow,
.mega__rail-item:hover .mega__rail-arrow {
    opacity: 1;
    transform: translateX(0);
}
.mega__rail-item:hover .mega__rail-icon { transform: translateY(-1px); }

/* Right: panels */
.mega__panels {
    padding: 28px 32px;
    position: relative;
}
.mega__panel { display: none; animation: megaFade .22s ease; }
.mega__panel.is-active { display: block; }

@keyframes megaFade {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.mega__panel-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 18px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--color-border-light);
}
.mega__panel-eyebrow {
    font-size: 11px;
    letter-spacing: .12em;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--color-muted);
    margin: 0 0 4px;
}
.mega__panel-title {
    font-family: var(--font-family-display);
    font-size: 1.55rem;
    line-height: 1.15;
    color: var(--color-navy);
    margin: 0;
    font-weight: 600;
    letter-spacing: -0.015em;
}
.mega__panel-tagline {
    font-size: 0.875rem;
    color: var(--color-muted);
    margin: 6px 0 0;
    max-width: 46ch;
}
.mega__panel-overview {
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-navy);
    padding: 8px 14px;
    border-radius: var(--radius-full);
    background: #F8FAFC;
    transition: background .15s ease, transform .15s ease;
    white-space: nowrap;
    flex-shrink: 0;
}
.mega__panel-overview:hover {
    background: #F1F5F9;
    transform: translateY(-1px);
}

.mega__panel-grid {
    list-style: none;
    margin: 0;
    padding: 0;
}

.mega__panel-grid li {
    display: block;
    width: 100%;
    margin-bottom: 12px;
}
.mega__sub {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 12px;
    text-decoration: none;
    transition: background .15s ease, transform .15s ease;
}
.mega__sub:hover {
    background: #F8FAFC;
    transform: translateX(2px);
}
.mega__sub-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-navy);
    margin-top: 8px;
    flex-shrink: 0;
    opacity: .25;
}
.mega__sub-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.mega__sub-name {
    color: var(--color-navy);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: -0.005em;
}
.mega__sub:hover .mega__sub-name { color: var(--color-navy); }
.mega__sub-desc {
    color: var(--color-muted);
    font-size: 0.78rem;
    line-height: 1.45;
}

/* Footer bar */
.mega__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    border-top: 1px solid var(--color-border-light);
    background: #fff;
    font-size: 0.83rem;
    color: var(--color-muted);
}
.mega__footer strong { color: var(--color-navy); font-weight: 600; }
.mega__footer a {
    text-decoration: none;
    color: var(--color-navy);
    font-weight: 600;
}
.mega__footer a:hover { text-decoration: underline; }

/* ── Mobile hamburger ── */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--space-2);
    background: none;
    border: none;
    z-index: calc(var(--z-sticky) + 10);
    flex-shrink: 0;
}
.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-navy);
    border-radius: var(--radius-full);
    transition: transform .25s ease, opacity .25s ease;
}
.mobile-menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile drawer ── */
.mobile-menu {
    display: none;
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    z-index: calc(var(--z-sticky) + 5);
    overflow-y: auto;
    padding: var(--space-4) var(--space-5) var(--space-8);
    flex-direction: column;
    gap: 2px;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--color-border-light);
}
.mobile-menu.open { display: flex; }

.mobile-menu > a {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    color: var(--color-navy);
    font-weight: 500;
    font-size: 1rem;
    border-radius: 12px;
    text-decoration: none;
    transition: background .15s ease, color .15s ease;
}
.mobile-menu > a:hover { background: #F1F5F9; color: var(--color-navy); }

.mobile-services-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    color: var(--color-navy);
    font-weight: 500;
    font-size: 1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: background .15s ease, color .15s ease;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}
.mobile-services-toggle:hover,
.mobile-services-toggle.active { background: #F1F5F9; color: var(--color-navy); }

.mobile-services-caret { transition: transform .25s ease; font-size: 12px; }
.mobile-services-toggle.active .mobile-services-caret { transform: rotate(180deg); }

.mobile-services-submenu {
    display: none;
    flex-direction: column;
    padding: 4px 0 8px 4px;
    gap: 2px;
}
.mobile-services-submenu.open { display: flex; }

.mobile-dept-accordion { border-radius: 12px; overflow: hidden; }
.mobile-dept-accordion > summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    font-weight: 600;
    color: var(--color-navy);
    font-size: 0.95rem;
    border-radius: 10px;
}
.mobile-dept-accordion > summary::-webkit-details-marker { display: none; }
.mobile-dept-dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--color-navy);
    opacity: .25;
    flex-shrink: 0;
}
.mobile-dept-caret { margin-left: auto; transition: transform .25s ease; font-size: 12px; color: var(--color-muted); }
.mobile-dept-accordion[open] > summary .mobile-dept-caret { transform: rotate(180deg); }
.mobile-dept-accordion[open] > summary { background: #F8FAFC; }

.mobile-dept-body {
    display: flex;
    flex-direction: column;
    padding: 4px 0 10px 22px;
    gap: 1px;
}

.mobile-dept-link {
    display: block;
    padding: 10px 12px;
    color: var(--color-navy-mid);
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: 10px;
    text-decoration: none;
    transition: background .15s ease, color .15s ease;
}
.mobile-dept-link:hover { background: #F1F5F9; color: var(--color-navy); }
.mobile-dept-link--overview { color: var(--color-navy); font-weight: 600; }
.mobile-dept-link--all {
    background: var(--color-navy);
    color: #fff !important;
    font-weight: 600;
    text-align: center;
    justify-content: center;
    margin-bottom: 8px;
}
.mobile-dept-link--all:hover { background: #0f172a; color: #fff; }

.mobile-menu-divider {
    height: 1px;
    background: var(--color-border);
    margin: 10px 4px;
}

.mobile-menu-cta {
    margin-top: 16px;
    padding: 14px 16px;
    background: var(--color-primary);
    color: var(--color-white) !important;
    border-radius: 12px;
    font-weight: 600 !important;
    text-align: center;
    justify-content: center;
    box-shadow: 0 8px 22px -10px rgba(0,87,255,.55);
}
.mobile-menu-cta:hover { background: var(--color-primary-dark) !important; color: #fff !important; }

/* ── Responsive ── */

/* Tighten spacing before the mobile breakpoint so all links fit. */
@media (max-width: 1280px) {
    .navbar-container { gap: var(--space-5); }
    .main-navigation { gap: var(--space-4); }
    .main-menu { gap: 2px; }
    .main-menu li a {
        padding: 0.5rem 0.6rem;
        font-size: 0.9rem;
    }
    .btn-quote {
        padding: 0.55rem 1.05rem !important;
        font-size: 0.85rem !important;
    }
}

@media (max-width: 1180px) {
    .navbar-container { gap: var(--space-3); }
    .main-navigation { gap: var(--space-3); }
    .main-menu li a {
        padding: 0.45rem 0.5rem;
        font-size: 0.87rem;
    }
    .logo-wrap img.improx-logo { height: 34px; }
    .mega { width: calc(100vw - 32px); }
    .mega__inner { grid-template-columns: 230px 1fr; min-height: 420px; }
    .mega__panels { padding: 22px 24px; }
}

/* Switch to the mobile drawer earlier so nothing gets clipped
   in the awkward 1024–1180 range (customizer panels, split screens, etc). */
@media (max-width: 1150px) {
    .main-navigation { display: none; }
    .mobile-menu-toggle { display: flex; }
}

@media (max-width: 480px) {
    .navbar-container { height: 68px; }
    .mobile-menu { top: 68px; padding: var(--space-3) var(--space-4) var(--space-8); }
    .logo-wrap img.improx-logo { height: 32px; }
}