/**
 * Barra de navegación compartida: sitio estático (header/navbar) y sistema (topbar).
 * Requiere css/theme.css + fuentes Quicksand e Inter.
 */
header,
.topbar {
    position: relative;
    z-index: 1;
    background: linear-gradient(180deg, var(--azul-institucional) 0%, var(--azul-profundo) 100%);
    border-bottom: 3px solid var(--celeste-escudo);
    box-shadow: 0 4px 16px rgba(var(--azul-rgb), 0.28);
}

.navbar,
.topbar-inner {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container,
.brand {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-img,
.brand-logo {
    height: 55px;
    width: auto;
    display: block;
}

.logo-text,
.brand-text {
    font-family: 'Quicksand', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    line-height: 1.2;
    color: var(--blanco);
}

.nav,
.nav.nav--session {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 14px;
    flex: 1 1 auto;
    min-width: 0;
}

.nav-session-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav.nav--session:has(.nav-session-meta),
.nav.nav--authenticated {
    flex-direction: column;
    align-items: flex-end;
    align-self: flex-start;
    gap: 10px;
    flex: 1 1 auto;
    min-width: 0;
    max-width: min(820px, 100%);
}

.nav.nav--session:has(.nav-session-meta) .nav-links,
.nav.nav--authenticated .nav-links {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 12px 18px;
}

.navbar .pill,
.topbar .pill {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(var(--celeste-escudo-rgb), 0.2);
    color: var(--celeste-escudo);
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    line-height: 1.2;
}

.navbar .user-chip,
.topbar .user-chip {
    color: rgba(255, 255, 255, 0.9);
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 0.92rem;
    line-height: 1.25;
}

.navbar .nav-account-btn,
.topbar .nav-account-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: auto;
    height: auto;
    margin: 0;
    padding: 4px 0;
    border-radius: 0;
    background: transparent;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    flex-shrink: 0;
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: color 0.2s ease;
}

.navbar .nav-account-btn:hover,
.topbar .nav-account-btn:hover {
    background: transparent;
    color: var(--celeste-escudo);
    text-decoration: none;
    transform: none;
}

.nav-account-btn__icon {
    width: 16px;
    height: 16px;
    display: block;
}

.nav-account-btn__text {
    display: inline;
}

.nav-account-sep {
    color: rgba(255, 255, 255, 0.45);
    font-weight: 500;
    line-height: 1;
    flex-shrink: 0;
    user-select: none;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    gap: 18px;
    margin: 0;
    padding: 0;
}

.nav-links li,
.nav-submenu,
.nav-submenu li {
    list-style: none;
}

.nav-links a {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.25;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: rgba(255, 255, 255, 0.9);
    transition: color 0.25s ease, transform 0.25s ease;
}

.nav-links a:hover {
    color: var(--celeste-escudo);
    transform: translateY(-1px);
    text-decoration: none;
}

.nav-links a[aria-current="page"],
.nav-links .nav-submenu-toggle[aria-current="true"] {
    color: var(--celeste-escudo);
}

.nav-links .inline-post-form {
    display: inline;
    margin: 0;
    padding: 0;
}

.nav-links .inline-post-form .link-button {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.25;
    background: none;
    border: 0;
    padding: 0;
    color: rgba(255, 255, 255, 0.9);
    cursor: pointer;
    transition: color 0.25s ease;
}

.nav-links .inline-post-form .link-button:hover {
    color: var(--celeste-escudo);
}

.nav-toggle {
    display: none;
    background: transparent;
    border: 0;
    cursor: pointer;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.08);
}

.nav-toggle-icon {
    position: relative;
    display: block;
    width: 26px;
    height: 2px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 2px;
    transition: background 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: '';
    position: absolute;
    left: 0;
    width: 26px;
    height: 2px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 2px;
    transition: transform 0.2s ease, top 0.2s ease;
}

.nav-toggle-icon::before { top: -8px; }
.nav-toggle-icon::after { top: 8px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon,
.nav-toggle.is-open .nav-toggle-icon {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before,
.nav-toggle.is-open .nav-toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after,
.nav-toggle.is-open .nav-toggle-icon::after {
    top: 0;
    transform: rotate(-45deg);
}

@media (max-width: 768px) {
    .navbar,
    .topbar-inner {
        padding: 10px 16px;
        flex-wrap: wrap;
    }

    .nav-session-meta {
        flex-wrap: nowrap;
        max-width: 100%;
        min-width: 0;
        gap: 8px;
    }

    .navbar .user-chip,
    .topbar .user-chip {
        display: inline-block;
        min-width: 0;
        max-width: 12rem;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: 0.82rem;
    }

    .navbar .nav-account-btn,
    .topbar .nav-account-btn {
        flex-shrink: 0;
    }

    .nav.nav--session:has(.nav-session-meta),
    .nav.nav--authenticated {
        max-width: none;
        width: 100%;
        align-items: flex-end;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        padding: 12px 20px 20px;
        background: var(--azul-oscuro);
        border-bottom-left-radius: 16px;
        border-bottom-right-radius: 16px;
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
        z-index: 1003;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: max-height 0.25s ease, opacity 0.25s ease;
    }

    .nav-links.is-open,
    .navbar .nav.is-open .nav-links,
    .topbar .nav.is-open .nav-links {
        max-height: min(75vh, 520px);
        opacity: 1;
        overflow-y: auto;
    }

    .nav-links li {
        width: 100%;
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .nav-links a {
        display: block;
        padding: 10px 0;
        border-radius: 0;
        background: transparent;
        font-size: 0.95rem;
    }

    .nav-links a:hover {
        background: transparent;
        color: var(--celeste-escudo);
    }

    .nav-item-has-submenu {
        width: 100%;
    }

    .nav-submenu-toggle {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 10px 0;
        border-radius: 0;
        background: transparent;
        border: 0;
        font-family: 'Inter', sans-serif;
        font-size: 0.95rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        color: rgba(255, 255, 255, 0.9);
        cursor: pointer;
    }

    .nav-submenu-toggle:hover,
    .nav-item-has-submenu.is-open .nav-submenu-toggle,
    .nav-submenu-toggle[aria-current="true"] {
        background: transparent;
        color: var(--celeste-escudo);
    }

    .nav-submenu-caret {
        display: inline-block;
        width: 0;
        height: 0;
        border-left: 4px solid transparent;
        border-right: 4px solid transparent;
        border-top: 5px solid currentColor;
        transition: transform 0.2s ease;
    }

    .nav-submenu-toggle[aria-expanded="true"] .nav-submenu-caret {
        transform: rotate(180deg);
    }

    .nav-submenu {
        position: static;
        box-shadow: none;
        background: transparent;
        list-style: none;
        margin: 0;
        padding: 0 0 0 14px;
    }

    .nav-submenu li {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .nav-submenu a {
        font-size: 0.9rem;
        text-transform: none;
        letter-spacing: 0;
    }
}

/* Submenús de navegación (escritorio) */
@media (min-width: 769px) {
    .nav-item-has-submenu {
        position: relative;
    }

    .nav-submenu-toggle {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-family: 'Inter', sans-serif;
        font-size: 0.8rem;
        font-weight: 600;
        line-height: 1.25;
        text-transform: uppercase;
        letter-spacing: 0.04em;
        color: rgba(255, 255, 255, 0.9);
        background: transparent;
        border: 0;
        padding: 0;
        cursor: pointer;
        transition: color 0.25s ease;
    }

    .nav-submenu-toggle:hover,
    .nav-item-has-submenu.is-open .nav-submenu-toggle,
    .nav-submenu-toggle[aria-expanded="true"],
    .nav-submenu-toggle[aria-current="true"] {
        color: var(--celeste-escudo);
    }

    .nav-submenu-caret {
        display: inline-block;
        width: 0;
        height: 0;
        border-left: 4px solid transparent;
        border-right: 4px solid transparent;
        border-top: 5px solid currentColor;
        transition: transform 0.2s ease;
    }

    .nav-submenu-toggle[aria-expanded="true"] .nav-submenu-caret {
        transform: rotate(180deg);
    }

    .nav-submenu {
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        min-width: 220px;
        margin: 0;
        padding: 8px;
        list-style: none;
        background: var(--azul-profundo);
        border: 1px solid rgba(var(--celeste-escudo-rgb), 0.25);
        border-radius: 12px;
        box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
        z-index: 1004;
    }

    .nav-submenu a {
        display: block;
        padding: 10px 12px;
        border-radius: 8px;
        font-size: 0.82rem;
        text-transform: none;
        letter-spacing: 0;
        color: rgba(255, 255, 255, 0.92);
    }

    .nav-submenu a:hover {
        background: rgba(var(--celeste-escudo-rgb), 0.16);
        color: var(--celeste-escudo);
        transform: none;
    }
}