/* ============================================================
   V16 primary navigation — solid bar + one-panel mega menus.
   Loaded after site.css / perf.css.
   ============================================================ */

.site-header {
    --nav-ink: var(--ink, #102f42);
    --nav-accent: var(--blue, #00668e);
    --nav-line: var(--line, #dce7ed);
    --nav-muted: #6b7c88;
    --nav-bar-height: 72px;
}

.site-header .mainbar {
    background: #ffffff;
    border-bottom: 1px solid var(--nav-line);
}

.site-header .mainbar .mainbar__inner {
    min-height: var(--nav-bar-height);
    padding: 0;
    gap: clamp(20px, 2.4vw, 40px);
}

/* Logo always sits on white now: use the blue mark only. */
.site-header .mainbar .brand--desktop-compact .brand__logo--white {
    display: none;
}

.site-header .mainbar .brand--desktop-compact .brand__logo--blue {
    position: static;
    display: block;
    opacity: 1;
    transform: none;
    pointer-events: auto;
}

.site-header .mainbar .brand--desktop-compact .brand__mark .brand__logo {
    max-height: 60px;
}

/* ---------- Main bar ---------- */

.primary-nav {
    display: none;
}

.primary-nav__list {
    display: flex;
    align-items: stretch;
    justify-content: flex-end;
    gap: clamp(2px, 0.6vw, 12px);
    height: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
}

.primary-nav__item {
    position: static;
    display: flex;
}

.primary-nav__trigger {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: var(--nav-bar-height);
    padding: 0 clamp(6px, 0.8vw, 14px);
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--nav-ink);
    font-family: var(--font-nav);
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1.2;
    text-transform: uppercase;
    white-space: nowrap;
    cursor: pointer;
    transition: color 150ms ease;
}

body[data-lang="ge"] .primary-nav__trigger {
    font-size: 0.9rem;
    letter-spacing: 0.01em;
    text-transform: none;
}

.primary-nav__trigger::after {
    content: "";
    position: absolute;
    left: clamp(6px, 0.8vw, 14px);
    right: clamp(6px, 0.8vw, 14px);
    bottom: -1px;
    height: 2px;
    background: var(--nav-accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 180ms ease;
}

.primary-nav__chevron {
    width: 12px;
    height: 12px;
    flex: 0 0 auto;
    opacity: 0.55;
    transition: transform 180ms ease, opacity 150ms ease;
}

.primary-nav__trigger:hover,
.primary-nav__item.is-open > .primary-nav__trigger,
.primary-nav__item.is-current > .primary-nav__trigger {
    color: var(--nav-accent);
}

.primary-nav__trigger:hover::after,
.primary-nav__item.is-open > .primary-nav__trigger::after,
.primary-nav__item.is-current > .primary-nav__trigger::after {
    transform: scaleX(1);
}

.primary-nav__item.is-open > .primary-nav__trigger .primary-nav__chevron {
    opacity: 1;
    transform: rotate(180deg);
}

.primary-nav__trigger:focus-visible {
    outline: 2px solid var(--nav-accent);
    outline-offset: -6px;
}

/* ---------- Mega panel ---------- */

.mega {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 20;
    max-height: calc(100vh - var(--v16-site-header-offset, 120px) - 16px);
    overflow-y: auto;
    overscroll-behavior: contain;
    background: #ffffff;
    border-top: 1px solid var(--nav-line);
    border-bottom: 1px solid var(--nav-line);
    box-shadow: 0 18px 30px -18px rgba(12, 52, 78, 0.28);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 150ms ease, transform 150ms ease, visibility 0s linear 150ms;
}

.primary-nav__item.is-open > .mega,
.primary-nav:not(.is-enhanced) .primary-nav__item:hover > .mega,
.primary-nav:not(.is-enhanced) .primary-nav__item:focus-within > .mega {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: 0s;
}

.primary-nav.is-switching .mega {
    transition: none;
}

.mega__inner {
    display: grid;
    grid-template-columns: minmax(170px, 220px) minmax(0, 1fr);
    gap: clamp(24px, 3vw, 48px);
    padding: 28px 0 32px;
}

.mega__intro {
    padding-right: clamp(16px, 2vw, 32px);
    border-right: 1px solid var(--nav-line);
}

.mega__title {
    margin: 0 0 14px;
    color: var(--dark, #0c4a6a);
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.25;
}

.mega__overview {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--nav-accent);
    font-family: "Inter", "Noto Sans Georgian", system-ui, sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.35;
    text-decoration: none;
}

.mega__overview svg {
    width: 14px;
    height: 14px;
    flex: 0 0 auto;
    transition: transform 150ms ease;
}

.mega__overview:hover span,
.mega__overview.is-current span {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.mega__overview:hover svg {
    transform: translateX(2px);
}

.mega__columns {
    display: grid;
    grid-template-columns: repeat(var(--mega-cols, 3), minmax(0, 1fr));
    gap: 0 clamp(24px, 3vw, 48px);
    align-items: start;
}

.mega__column {
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-width: 0;
}

/* Category label: grey, not a link, no hover state. */
.mega__heading {
    margin: 0 0 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--nav-line);
    color: #8a97a1;
    font-family: "Inter", "Noto Sans Georgian", system-ui, sans-serif;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    line-height: 1.3;
    text-transform: uppercase;
    cursor: default;
}

body[data-lang="ge"] .mega__heading {
    font-size: 0.78rem;
    letter-spacing: 0.02em;
    text-transform: none;
}

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

.mega__columns--flat .mega__links {
    columns: 3 200px;
    column-gap: clamp(24px, 3vw, 48px);
}

.mega__links li {
    break-inside: avoid;
}

.mega__link {
    display: block;
    margin-left: -12px;
    padding: 6px 0 6px 10px;
    border-left: 2px solid transparent;
    color: var(--nav-accent);
    font-family: "Inter", "Noto Sans Georgian", system-ui, sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.4;
    text-decoration: none;
    transition: color 120ms ease, border-color 120ms ease;
}

a.mega__link:hover,
a.mega__link.is-current {
    color: var(--dark, #0c4a6a);
    border-left-color: var(--nav-accent);
}

a.mega__link.is-current {
    font-weight: 700;
}

.mega__link:focus-visible,
.mega__overview:focus-visible {
    outline: 2px solid var(--nav-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

.mega__ext {
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 4px;
    vertical-align: -1px;
    opacity: 0.55;
}

.mega__link--disabled {
    color: #95a3ad;
    font-weight: 500;
    cursor: default;
}

.mega__badge {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 6px;
    border: 1px solid var(--nav-line);
    border-radius: 3px;
    background: #f5f8fa;
    color: var(--nav-muted);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    line-height: 1.5;
    text-transform: uppercase;
    white-space: nowrap;
}

/* ---------- Topbar menu: dropdown under the active topbar item ---------- */

/* Above .nav-toggle (z-index 410) so the open panel covers the header row. */
.topbar {
    position: relative;
    z-index: 420;
}

.topbar__trigger.is-current {
    color: #ffffff;
}

.topbar-mega {
    position: absolute;
    top: 100%;
    left: var(--topbar-panel-left, auto);
    right: auto;
    width: max-content;
    min-width: 240px;
    max-width: min(360px, calc(100vw - 32px));
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    overscroll-behavior: contain;
    background: #ffffff;
    border: 1px solid var(--nav-line, #dce7ed);
    border-top: 3px solid var(--nav-accent, #00668e);
    box-shadow: 0 18px 30px -18px rgba(12, 52, 78, 0.32);
    font-family: "Inter", "Noto Sans Georgian", system-ui, sans-serif;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 150ms ease, transform 150ms ease, visibility 0s linear 150ms;
}

.topbar.is-menu-open .topbar-mega {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: 0s;
}

.topbar-mega__column {
    min-width: 0;
    padding: 12px 22px 14px;
}

.topbar-mega__column:not(.is-highlighted) {
    display: none;
}

.topbar-mega__links {
    margin: 0;
    padding: 0;
    list-style: none;
}

.topbar .topbar-mega__link {
    display: block;
    margin-left: -12px;
    padding: 6px 0 6px 10px;
    border-left: 2px solid transparent;
    color: var(--nav-accent, #00668e);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.4;
    text-decoration: none;
    transition: color 120ms ease, border-color 120ms ease;
}

.topbar .topbar-mega__link:hover,
.topbar .topbar-mega__link.is-current {
    color: var(--dark, #0c4a6a);
    border-left-color: var(--nav-accent, #00668e);
}

.topbar .topbar-mega__link.is-current {
    font-weight: 700;
}

.topbar .topbar-mega__link:focus-visible {
    outline: 2px solid var(--nav-accent, #00668e);
    outline-offset: 2px;
    border-radius: 2px;
}

@media (max-width: 640px) {
    .topbar-mega {
        left: 0;
        right: 0;
        width: auto;
        max-width: none;
        border-inline: 0;
    }
}

/* ---------- Desktop only ---------- */

@media (min-width: 1281px) {
    /* Panels anchor to the full-width .mainbar, not the centered container. */
    .site-header .mainbar .mainbar__inner {
        position: static;
    }

    .primary-nav {
        display: flex;
        flex: 1 1 auto;
        align-self: stretch;
        justify-content: flex-end;
        min-width: 0;
    }
}

@media (min-width: 1281px) and (max-width: 1440px) {
    .primary-nav__trigger {
        font-size: 0.78rem;
        letter-spacing: 0.03em;
    }

    body[data-lang="ge"] .primary-nav__trigger {
        font-size: 0.84rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .mega,
    .topbar-mega,
    .primary-nav__trigger::after,
    .primary-nav__chevron {
        transition: none;
    }
}