/* =============================================================
   Ilumina Murcia — partials/header.css
   Site header sticky, transparente sobre hero, contracción al
   scroll, menú lateral en escritorio, desplegable en móvil.
   ============================================================= */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.96);
    backdrop-filter: saturate(180%) blur(10px);
    -webkit-backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid transparent;
    transition: background-color var(--t-base),
                box-shadow var(--t-base),
                border-color var(--t-base);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-5);
    padding-block: var(--sp-5);
    transition: padding var(--t-base);
}


/* --- Logo --- */
.site-header__logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    line-height: 0;
    position: relative;
}
.site-header__logo img {
    height: 56px;
    width: auto;
    transition: height var(--t-base),
                opacity var(--t-base);
}

/* Versión blanca apilada encima de la de color (para hero transparente) */
.site-header__logo-white {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    pointer-events: none;
}


/* --- Grupo derecha del header: selector + toggle + nav --- */
.site-header__right {
    display: flex;
    align-items: center;
    gap: var(--sp-5);
}


/* --- Selector de idioma ES / EN --- */
.lang-switcher {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    padding: 3px;
    transition: border-color var(--t-base);
}
.lang-switcher__btn {
    font-family: var(--font-sans);
    font-size: var(--fs-xs);
    font-weight: var(--fw-semibold);
    letter-spacing: 0.06em;
    padding: 5px 11px;
    border-radius: var(--radius-pill);
    color: var(--color-text-muted);
    line-height: 1;
    transition: background-color var(--t-base),
                color var(--t-base);
    cursor: pointer;
}
.lang-switcher__btn:hover {
    color: var(--color-primary);
}
.lang-switcher__btn.is-active {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
}


/* --- Estado contraído (al hacer scroll) --- */
.site-header.is-scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}
.site-header.is-scrolled .site-header__inner {
    padding-block: var(--sp-3);
}
.site-header.is-scrolled .site-header__logo img {
    height: 44px;
}


/* --- Navegación (escritorio) --- */
.site-nav {
    display: flex;
    align-items: center;
}
.site-nav__list {
    display: flex;
    gap: var(--sp-7);
}
.site-nav__list a {
    position: relative;
    display: inline-block;
    font-family: var(--font-sans);
    font-weight: var(--fw-medium);
    color: var(--color-text);
    letter-spacing: 0.01em;
    padding-block: var(--sp-2);
}
.site-nav__list a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--t-base);
}
.site-nav__list a:hover {
    color: var(--color-primary);
}
.site-nav__list a:hover::after,
.site-nav__list a.is-active::after {
    width: 100%;
}

/* Estado activo: peso semibold y color primario */
.site-nav__list a.is-active {
    color: var(--color-primary);
    font-weight: var(--fw-semibold);
}


/* --- Botón hamburguesa (oculto en escritorio) --- */
.site-header__toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    font-size: 1.75rem;
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    transition: background-color var(--t-base);
}
.site-header__toggle:hover {
    background-color: var(--color-primary-soft);
}


/* --- Móvil: < 992px --- */
@media (max-width: 991.98px) {

    .site-header__logo img { height: 48px; }
    .site-header.is-scrolled .site-header__logo img { height: 40px; }

    .site-header__toggle {
        display: inline-flex;
    }

    .site-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background-color: var(--color-bg);
        border-top: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        padding: var(--sp-5) var(--sp-5) var(--sp-6);
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--t-base),
                    opacity var(--t-base),
                    visibility var(--t-base);
    }
    .site-nav.is-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .site-nav__list {
        flex-direction: column;
        gap: 0;
    }
    .site-nav__list li {
        border-bottom: 1px solid var(--color-border);
    }
    .site-nav__list li:last-child {
        border-bottom: 0;
    }
    .site-nav__list a {
        display: block;
        font-size: var(--fs-lg);
        font-weight: var(--fw-medium);
        color: var(--color-primary);
        padding-block: var(--sp-4);
    }
    .site-nav__list a.is-active {
        font-weight: var(--fw-bold);
    }
    .site-nav__list a::after {
        display: none;
    }
}


/* =============================================================
   Header transparente (variante para páginas con hero a sangre)
   El layout marca body.has-hero. Mientras el header NO está
   contraído (no se ha scrolleado), se renderiza transparente
   con texto blanco; cuando aparece is-scrolled, recupera el
   estilo normal.
   ============================================================= */

body.has-hero .site-header:not(.is-scrolled) {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom-color: transparent;
}

/* Crossfade de logos: oculta el de color, muestra el blanco */
body.has-hero .site-header:not(.is-scrolled) .site-header__logo-color {
    opacity: 0;
}
body.has-hero .site-header:not(.is-scrolled) .site-header__logo-white {
    opacity: 1;
}

/* Enlaces del menú en blanco */
body.has-hero .site-header:not(.is-scrolled) .site-nav__list a {
    color: var(--color-text-inverse);
}
body.has-hero .site-header:not(.is-scrolled) .site-nav__list a::after {
    background-color: var(--color-text-inverse);
}

/* EXCEPCIÓN: si el menú móvil está abierto sobre hero, recupera fondo blanco */
@media (max-width: 991.98px) {
    body.has-hero .site-header:not(.is-scrolled) .site-nav.is-open .site-nav__list a {
        color: var(--color-primary);
    }
}

/* Hamburguesa en blanco */
body.has-hero .site-header:not(.is-scrolled) .site-header__toggle {
    color: var(--color-text-inverse);
}
body.has-hero .site-header:not(.is-scrolled) .site-header__toggle:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

/* Selector de idioma en blanco (header transparente sobre hero) */
body.has-hero .site-header:not(.is-scrolled) .lang-switcher {
    border-color: rgba(255, 255, 255, 0.5);
}
body.has-hero .site-header:not(.is-scrolled) .lang-switcher__btn {
    color: rgba(255, 255, 255, 0.85);
}
body.has-hero .site-header:not(.is-scrolled) .lang-switcher__btn:hover {
    color: var(--color-text-inverse);
}
body.has-hero .site-header:not(.is-scrolled) .lang-switcher__btn.is-active {
    background-color: var(--color-text-inverse);
    color: var(--color-primary);
}