/**
 * Topbar — cabecera independiente del CSS legacy (estilo.css).
 * Usa <div class="topbar"> en lugar de <header> y body.nav-open en lugar de body.open.
 */

/* ── Barra fija ── */
.topbar {
    --topbar-h: var(--header-h, 4.5rem);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 500;
    pointer-events: none;
}

.topbar__bar {
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    height: var(--topbar-h);
    padding: 0 clamp(1rem, 4vw, 2.5rem);
    background: var(--primary);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}

.topbar__brand {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    min-width: 0;
    text-decoration: none;
    transition: opacity 0.2s;
}

.topbar__logo {
    display: block;
    height: clamp(3.15rem, 6.2vw, 4.35rem);
    width: auto;
    max-width: min(15rem, 44vw);
    object-fit: contain;
    object-position: left center;
    flex-shrink: 0;
    filter: none;
}

[data-theme="dark"] .topbar__logo {
    filter: invert(1) brightness(1.05);
}

/* Sobre el vídeo del inicio: logo claro y legible */
body.home-page .topbar__logo {
    filter: invert(1) brightness(1.08) drop-shadow(0 1px 10px rgba(0, 0, 0, 0.45));
}

[data-theme="dark"] body.home-page .topbar__logo {
    filter: invert(1) brightness(1.08);
}

.topbar__brand:hover {
    opacity: 0.65;
}

.topbar__brand:hover .topbar__logo {
    opacity: 1;
}

/* ── Nav escritorio ── */
.topbar__nav {
    display: none;
}

.topbar__list {
    display: flex;
    align-items: center;
    gap: clamp(0.5rem, 2vw, 1.75rem);
    list-style: none;
    margin: 0;
    padding: 0;
}

.topbar__link {
    font-family: var(--font-body, Inter, sans-serif);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--text);
    opacity: 0.75;
    transition: opacity 0.2s;
    padding: 0.35rem 0;
}

.topbar__link:hover,
.topbar__link:focus {
    opacity: 1;
}

.topbar__link--draft {
    opacity: 0.55;
}

.topbar__draft {
    margin-left: 0.35em;
    font-size: 0.55rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0.7;
    vertical-align: middle;
}

.topbar__item {
    position: relative;
}

.topbar__sub {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 11rem;
    margin: 0;
    padding: 0.35rem 0;
    list-style: none;
    background: var(--background);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm, 0 1px 3px rgba(0, 0, 0, 0.08));
    z-index: 10;
}

.topbar__item--sub:hover .topbar__sub,
.topbar__item--sub:focus-within .topbar__sub {
    display: block;
}

.topbar__sub a {
    display: block;
    padding: 0.5rem 1.25rem;
    font-family: var(--font-body, Inter, sans-serif);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--text);
    opacity: 0.8;
}

.topbar__sub a:hover {
    opacity: 1;
}

/* ── Botón hamburguesa ── */
.topbar__toggle {
    pointer-events: auto;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0.5rem;
    margin: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
}

.topbar__toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: transform 0.25s ease, opacity 0.2s ease;
    transform-origin: center;
}

.topbar.is-open .topbar__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.topbar.is-open .topbar__toggle-bar:nth-child(2) {
    opacity: 0;
}

.topbar.is-open .topbar__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Panel móvil ── */
.topbar__panel {
    pointer-events: none;
    display: none;
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 499;
    background: var(--background);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.topbar.is-open .topbar__panel {
    display: block;
    pointer-events: auto;
}

.topbar__panel-nav {
    padding: 1.25rem clamp(1rem, 4vw, 2rem) 3rem;
}

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

.topbar__panel-link {
    display: block;
    padding: 1rem 0;
    font-family: var(--font-body, Inter, sans-serif);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.topbar__panel-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
}

.topbar__panel-row .topbar__panel-link {
    flex: 1;
    border-bottom: none;
}

.topbar__panel-expand {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    position: relative;
}

.topbar__panel-expand span {
    position: absolute;
    inset: 0;
    margin: auto;
    width: 10px;
    height: 10px;
}

.topbar__panel-expand span::before,
.topbar__panel-expand span::after {
    content: "";
    position: absolute;
    background: var(--text-muted);
    transition: transform 0.2s;
}

.topbar__panel-expand span::before {
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    margin-top: -0.5px;
}

.topbar__panel-expand span::after {
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    margin-left: -0.5px;
}

.topbar__panel-item--sub.is-open .topbar__panel-expand span::after {
    transform: scaleY(0);
}

.topbar__panel-sub {
    display: none;
    list-style: none;
    margin: 0;
    padding: 0 0 0.5rem;
}

.topbar__panel-item--sub.is-open .topbar__panel-sub {
    display: block;
}

.topbar__panel-sub a {
    display: block;
    padding: 0.65rem 0 0.65rem 0.75rem;
    font-family: var(--font-body, Inter, sans-serif);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--text-muted);
    border-bottom: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
}

.topbar__panel-sub a:hover {
    color: var(--text);
}

/* ── Body con menú abierto ── */
body.nav-open {
    overflow: hidden;
}

/* ── Idioma + acciones header ── */
.topbar__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
    pointer-events: auto;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-family: var(--font-body, Inter, sans-serif);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.14em;
}

.lang-switch__item {
    text-decoration: none;
    color: var(--text);
    opacity: 0.45;
    padding: 0.2rem 0.35rem;
    transition: opacity 0.2s;
}

.lang-switch__item:hover {
    opacity: 0.85;
}

.lang-switch__item--active {
    opacity: 1;
    pointer-events: none;
}

.topbar__panel-lang {
    padding: 0.75rem 0 1rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.5rem;
}

@media (min-width: 916px) {
    .topbar__panel-lang {
        display: none;
    }
}

/* ── Home: barra semitransparente sobre el vídeo (solo escritorio/tablet ancho) ── */
@media (min-width: 916px) {
    body.home-page .topbar__bar {
        background: color-mix(in srgb, var(--primary) 72%, transparent);
        border-bottom-color: color-mix(in srgb, var(--border) 50%, transparent);
    }
}

/* ── Escritorio ── */
@media (min-width: 916px) {
    .topbar__nav {
        display: block;
    }

    .topbar__toggle {
        display: none;
    }

    .topbar__panel {
        display: none !important;
    }
}

/* ── Móvil ── */
@media (max-width: 915px) {
    body.home-page .topbar__bar {
        background: var(--primary);
    }

    .topbar__logo {
        height: clamp(2.5rem, 8.5vw, 3.25rem);
        max-width: min(12rem, 50vw);
    }

    body.home-page .topbar__logo {
        filter: none;
    }

    [data-theme="dark"] body.home-page .topbar__logo {
        filter: invert(1) brightness(1.05);
    }
}