/**
 * Header + Mega-Menü
 *
 * Layout: Logo | Nav (Desktop) | Suche + Sprache + Burger
 * Breakpoint: Desktop ab 1024px, darunter Burger + Overlay-Menü.
 */

/* ──────────────────────────────────────────────────────────────
 * Site-Header
 * ────────────────────────────────────────────────────────────── */

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-dunkelbeige);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    min-height: var(--header-h);
}

.site-header__logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.site-header__logo-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.site-header__logo-svg {
    display: block;
    height: 40.68px;
    width: auto;
}

.site-header .custom-logo {
    max-height: 48px;
    width: auto;
}

.site-header__nav {
    display: none;
    flex: 1 1 auto;
    justify-content: center;
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* ──────────────────────────────────────────────────────────────
 * Haupt-Navigation
 * ────────────────────────────────────────────────────────────── */

.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    margin: 0;
    padding: 0;
    list-style: none;
}

.main-nav__item {
    position: relative;
}

.main-nav__link {
    position: relative;
    display: inline-block;
    padding: var(--space-4) 0;
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--fw-medium);
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-default);
}

.main-nav__link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: calc(var(--space-4) - 2px);
    height: 2px;
    background-color: var(--color-nav-active);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform var(--duration-normal) var(--ease-out);
}

.main-nav__item:hover .main-nav__link::after,
.main-nav__item:focus-within .main-nav__link::after,
.main-nav__link.is-active::after,
.main-nav__item.is-active .main-nav__link::after {
    transform: scaleX(1);
}

.main-nav__link:hover,
.main-nav__link:focus-visible {
    color: var(--color-navy);
}

/* ──────────────────────────────────────────────────────────────
 * Mega-Menü Panel
 *   Spaltentypen: links | teaser | promo | events (WYSIWYG)
 *   Glass-Effekt: das Panel ist eine frostige Glas-Schicht; auf
 *   Hover/Open verstärkt sich der Blur, sodass der Hintergrund
 *   weicher durchscheint.
 * ────────────────────────────────────────────────────────────── */

/* Damit das Panel die volle Header-Breite überspannt (statt nur
 * unter dem Top-Level-Item zu liegen), heben wir die normale
 * relative Positionierung der Items im Desktop auf. */
@media (min-width: 1025px) {
    .site-header__inner,
    .site-header__nav,
    .main-nav,
    .main-nav__item {
        position: static;
    }
}

.mega-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: var(--z-mega-menu);

    background-color: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(14px) saturate(1.4);
    -webkit-backdrop-filter: blur(14px) saturate(1.4);

    border-top: 1px solid var(--color-dunkelbeige);
    border-bottom: 1px solid var(--color-dunkelbeige);
    box-shadow: 0 16px 40px rgba(0, 35, 152, 0.08);

    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition:
        opacity var(--duration-normal) var(--ease-default),
        transform var(--duration-normal) var(--ease-default),
        backdrop-filter var(--duration-normal) var(--ease-default),
        background-color var(--duration-normal) var(--ease-default),
        visibility 0s linear var(--duration-normal);
}

.main-nav__item--has-mega.is-open .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
    transition:
        opacity var(--duration-normal) var(--ease-default),
        transform var(--duration-normal) var(--ease-default),
        backdrop-filter var(--duration-normal) var(--ease-default),
        background-color var(--duration-normal) var(--ease-default),
        visibility 0s;
}

/* Glass-Verstärkung beim Hover über Trigger oder Panel */
.main-nav__item--has-mega.is-open:hover .mega-menu,
.main-nav__item--has-mega.is-open .mega-menu:hover {
    background-color: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(22px) saturate(1.6);
    -webkit-backdrop-filter: blur(22px) saturate(1.6);
}

.mega-menu__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-8) var(--container-padding);
}

/* Spalten-Grid (max. 4 Spalten) */
.mega-menu__columns {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.mega-menu__col--1-4 { grid-column: span 1; }
.mega-menu__col--1-3 { grid-column: span 1; }
.mega-menu__col--1-2 { grid-column: span 2; }

/* ── Spalten-Typ: Link-Gruppen ── */

.mega-menu__group-title {
    position: relative;
    margin: 0 0 var(--space-4);
    padding-bottom: var(--space-3);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: var(--fw-bold);
    color: var(--color-navy);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.mega-menu__group-title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 24px;
    height: 2px;
    background-color: var(--color-electric-blue);
    border-radius: 1px;
}

.mega-menu__col--links .mega-menu__link-list + .mega-menu__group-title {
    margin-top: var(--space-6);
}

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

.mega-menu__item {
    margin: 0;
    padding: 0;
}

.mega-menu__link {
    display: block;
    padding: var(--space-1) 0;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--fw-regular);
    color: var(--color-text);
    text-decoration: none;
    transition:
        color var(--duration-fast) var(--ease-default),
        padding-left var(--duration-fast) var(--ease-default);
}

.mega-menu__link:hover,
.mega-menu__link:focus-visible {
    color: var(--color-navy);
    padding-left: var(--space-2);
}

.mega-menu__overview-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: var(--fw-medium);
    color: var(--color-navy);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-default);
}

.mega-menu__overview-link:hover,
.mega-menu__overview-link:focus-visible {
    color: var(--color-electric-blue);
}

.mega-menu__overview-arrow {
    font-size: 1.2em;
    transition: transform var(--duration-fast) var(--ease-default);
}

.mega-menu__overview-link:hover .mega-menu__overview-arrow {
    transform: translateX(3px);
}

/* ── Spalten-Typ: Teaser ── */

.mega-menu__teaser-image {
    margin-bottom: var(--space-4);
    overflow: hidden;
    border-radius: 8px;
}

.mega-menu__teaser-image img {
    display: block;
    width: 100%;
    height: 160px;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-default);
}

.mega-menu__col--teaser:hover .mega-menu__teaser-image img {
    transform: scale(1.04);
}

.mega-menu__teaser-title {
    margin: 0 0 var(--space-2);
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: var(--fw-semibold);
    color: var(--color-text);
    line-height: var(--lh-snug);
}

.mega-menu__teaser-text {
    margin: 0 0 var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: var(--lh-normal);
}

.mega-menu__teaser-btn {
    font-size: var(--text-xs);
}

/* ── Spalten-Typ: Promo-Banner ── */

.mega-menu__promo {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    min-height: 240px;
    padding: var(--space-6);
    overflow: hidden;
    border-radius: 12px;
    background-color: var(--color-navy);
}

.mega-menu__promo-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.25;
}

.mega-menu__promo-overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    pointer-events: none;
}

.mega-menu__promo-content {
    position: relative;
    z-index: var(--z-base);
    display: flex;
    flex: 1;
    flex-direction: column;
    align-items: flex-start;
}

.mega-menu__promo-tag {
    position: relative;
    display: block;
    width: fit-content;
    margin: 0 0 var(--space-4);
    padding: 0 0 var(--space-3);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: var(--fw-bold);
    color: var(--mega-promo-text-color, var(--color-white));
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.mega-menu__promo-tag::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 24px;
    height: 2px;
    background-color: var(--color-electric-blue);
    border-radius: 1px;
}

.mega-menu__promo-title {
    margin: 0 0 var(--space-2);
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: var(--fw-semibold);
    color: var(--mega-promo-text-color, var(--color-white));
    line-height: var(--lh-snug);
}

.mega-menu__promo-text {
    margin: 0 0 var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--mega-promo-text-color, var(--color-white));
    opacity: 0.85;
    line-height: var(--lh-normal);
}

.mega-menu__promo-btn {
    align-self: flex-start;
    margin-top: auto;
}

/* ── Spalten-Typ: Events (WYSIWYG) ── */

.mega-menu__events-content {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--color-text);
    line-height: var(--lh-normal);
}

.mega-menu__events-content p {
    margin: 0 0 var(--space-3);
}

.mega-menu__events-content ul,
.mega-menu__events-content ol {
    margin: 0 0 var(--space-3);
    padding-left: var(--space-4);
}

.mega-menu__events-content li {
    margin-bottom: var(--space-2);
}

.mega-menu__events-content a {
    color: var(--color-navy);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-default);
}

.mega-menu__events-content a:hover,
.mega-menu__events-content a:focus-visible {
    color: var(--color-electric-blue);
}

.mega-menu__events-content strong {
    font-weight: var(--fw-semibold);
    color: var(--color-navy);
}

/* ──────────────────────────────────────────────────────────────
 * Suche
 * ────────────────────────────────────────────────────────────── */

.site-search {
    display: none;
    align-items: center;
    background-color: var(--color-white);
    border: 1px solid var(--color-dunkelbeige);
    border-radius: 999px;
    overflow: hidden;
    transition: border-color var(--duration-fast) var(--ease-default);
}

.site-search:focus-within {
    border-color: var(--color-navy);
}

.site-search__input {
    appearance: none;
    width: 180px;
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    color: var(--color-text);
    background: transparent;
    border: none;
    outline: none;
}

.site-search__submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-3);
    background: transparent;
    color: var(--color-navy);
    border: none;
    cursor: pointer;
}

.site-search__submit svg {
    width: 18px;
    height: 18px;
}

.site-search__submit:hover,
.site-search__submit:focus-visible {
    color: var(--color-electric-blue);
}

/* ──────────────────────────────────────────────────────────────
 * Sprache
 * ────────────────────────────────────────────────────────────── */

.lang-switch {
    display: none;
    align-items: center;
    gap: var(--space-2);
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: var(--text-sm);
    font-weight: var(--fw-medium);
}

.lang-switch__item a {
    color: var(--color-text-muted);
    text-decoration: none;
    padding: var(--space-1) var(--space-2);
    transition: color var(--duration-fast) var(--ease-default);
}

.lang-switch__item a:hover,
.lang-switch__item a:focus-visible {
    color: var(--color-navy);
}

.lang-switch__item.is-active a {
    color: var(--color-navy);
    font-weight: var(--fw-semibold);
}

.lang-switch__item + .lang-switch__item {
    border-left: 1px solid var(--color-dunkelbeige);
    padding-left: var(--space-3);
}

/* ──────────────────────────────────────────────────────────────
 * Burger (Mobile)
 * ────────────────────────────────────────────────────────────── */

.burger {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0 10px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.burger__line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-navy);
    transition:
        transform var(--duration-fast) var(--ease-default),
        opacity var(--duration-fast) var(--ease-default);
}

.burger[aria-expanded="true"] .burger__line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.burger[aria-expanded="true"] .burger__line:nth-child(2) {
    opacity: 0;
}

.burger[aria-expanded="true"] .burger__line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ──────────────────────────────────────────────────────────────
 * Mobile-Menu Overlay
 * ────────────────────────────────────────────────────────────── */

@media (max-width: 1024px) {
    .site-header__nav {
        position: fixed;
        inset: var(--header-h) 0 0 0;
        display: none;
        flex-direction: column;
        z-index: var(--z-overlay);
        background-color: var(--color-bg);
        overflow-y: auto;
        padding: var(--space-6);
    }

    body.is-mobile-nav-open {
        overflow: hidden;
    }

    body.is-mobile-nav-open .site-header__nav {
        display: flex;
    }

    .main-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
    }

    .main-nav__item {
        border-bottom: 1px solid var(--color-dunkelbeige);
    }

    .main-nav__link {
        display: block;
        padding: var(--space-4) 0;
        font-size: var(--text-lg);
    }

    .main-nav__link::after {
        display: none;
    }

    .main-nav__item.is-active > .main-nav__link {
        color: var(--color-navy);
        font-weight: var(--fw-semibold);
    }

    .mega-menu {
        position: static;
        display: none;
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border: none;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        pointer-events: auto;
        padding-bottom: var(--space-4);
    }

    .main-nav__item--has-mega.is-open .mega-menu {
        display: block;
    }

    .mega-menu__inner {
        padding: 0;
    }

    .mega-menu__columns {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .mega-menu__col--1-4,
    .mega-menu__col--1-3,
    .mega-menu__col--1-2 {
        grid-column: span 1;
    }

    /* Mobile: Promo + Teaser ausblenden, nur Links + Events */
    .mega-menu__col--teaser,
    .mega-menu__col--promo {
        display: none;
    }

    .mega-menu__link {
        padding: var(--space-2) var(--space-4);
        font-size: var(--text-base);
    }

    .site-search {
        display: none;
    }

    /* Sprachumschaltung: nur die Variante im Burger-Menü zeigen */
    .site-header__actions .lang-switch {
        display: none;
    }

    .site-header__nav .lang-switch--in-nav {
        display: flex;
        flex-direction: row;
        justify-content: flex-start;
        gap: var(--space-3);
        margin-top: auto;
        padding-top: var(--space-6);
        border-top: 1px solid var(--color-dunkelbeige);
    }

    .lang-switch--in-nav .lang-switch__item a {
        font-size: var(--text-base);
        padding: var(--space-2) var(--space-3);
    }

    /* Burger über das Overlay legen, damit das X immer klickbar bleibt */
    .burger {
        position: relative;
        z-index: calc(var(--z-overlay) + 10);
    }
}

/* Sehr kleine Geräte (≤ 480 px): Header-Layout enger ziehen.
 * --container-padding wird global in global.css reduziert. */
@media (max-width: 480px) {
    .site-header__inner {
        gap: var(--space-3);
    }

    .site-header__actions {
        gap: var(--space-2);
    }

    .site-header__logo-svg {
        height: 32px;
    }
}

/* ──────────────────────────────────────────────────────────────
 * Desktop
 * ────────────────────────────────────────────────────────────── */

@media (min-width: 1025px) {
    .site-header__nav {
        display: flex;
    }

    .site-search,
    .site-header__actions .lang-switch {
        display: flex;
    }

    .lang-switch--in-nav {
        display: none;
    }

    .burger {
        display: none;
    }
}