/* ── Variables compartidas del navbar ─────────────────────────────────── */
:root {
    --nb-primary:    #1d71b8;
    --nb-dark:       #0d1f3d;
    --nb-gray:       #374E66;
    --nb-white:      #ffffff;
    --nb-border:     #dce8f5;
    --nb-shadow-sm:  0 1px 2px 0 rgba(14,23,38,.05);
    --nb-shadow-md:  0 4px 6px -1px rgba(14,23,38,.1);
    --nb-shadow-xl:  0 20px 25px -5px rgba(14,23,38,.15);
    --nb-transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* Espacio para navbar fija */
body { padding-top: 70px; }

/* ── Navbar ───────────────────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--nb-shadow-sm);
    padding: 0.2rem 0;
}

.navbar > .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-logo {
    height: 55px;
    width: auto;
    transition: var(--nb-transition);
}
.nav-logo:hover { transform: scale(1.05); }

/* ── Menú ─────────────────────────────────────────────────────────────── */
.navbar .nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    margin: 0; padding: 0;
}

.navbar .nav-menu a {
    text-decoration: none;
    color: var(--nb-gray);
    font-weight: 600;
    font-size: .9rem;
    transition: var(--nb-transition);
}
.navbar .nav-menu a:hover { color: var(--nb-primary); }

.navbar .btn-nav {
    padding: .55rem 1.4rem;
    background: var(--nb-primary);
    color: var(--nb-white) !important;
    border-radius: 999px;
    font-weight: 700;
    transition: var(--nb-transition);
}
.navbar .btn-nav:hover { transform: translateY(-2px); opacity: .88; }

/* ── Selector de idioma ───────────────────────────────────────────────── */
.navbar .language-selector { position: relative; }

.navbar .lang-dropdown-btn {
    background: var(--nb-white);
    border: 2px solid var(--nb-border);
    cursor: pointer;
    padding: .4rem .5rem;
    border-radius: 2rem;
    transition: var(--nb-transition);
    display: flex;
    align-items: center;
    gap: .5rem;
    min-width: 70px;
}
.navbar .lang-dropdown-btn:hover {
    border-color: var(--nb-primary);
    box-shadow: var(--nb-shadow-md);
}

.navbar .lang-dropdown-btn .current-flag {
    display: flex; align-items: center; justify-content: center;
    width: 28px; height: 28px;
    border-radius: 50%;
    background: var(--nb-white);
    border: 2px solid var(--nb-border);
    overflow: hidden; flex-shrink: 0;
}
.navbar .lang-dropdown-btn .flag-img {
    width: 100%; height: 100%; object-fit: cover; display: block;
}

.navbar .dropdown-arrow {
    width: 16px; height: 16px;
    color: var(--nb-gray);
    transition: var(--nb-transition);
}
.navbar .language-selector.open .dropdown-arrow { transform: rotate(180deg); }

.navbar .lang-dropdown-menu {
    position: absolute;
    top: calc(100% + .5rem);
    right: 0;
    background: var(--nb-white);
    border: 2px solid var(--nb-border);
    border-radius: 1rem;
    box-shadow: var(--nb-shadow-xl);
    padding: .5rem;
    min-width: 160px;
    opacity: 0; visibility: hidden;
    transform: translateY(-10px);
    transition: var(--nb-transition);
    z-index: 1001;
}
.navbar .language-selector.open .lang-dropdown-menu {
    opacity: 1; visibility: visible; transform: translateY(0);
}

.navbar .lang-option {
    width: 100%; background: transparent; border: none; cursor: pointer;
    padding: .65rem 1rem; border-radius: .75rem;
    transition: var(--nb-transition);
    display: flex; align-items: center; gap: .75rem; text-align: left;
}
.navbar .lang-option:hover { background: rgba(29,113,184,.08); }
.navbar .lang-option.active { background: rgba(29,113,184,.1); }

.navbar .lang-option .flag {
    display: flex; align-items: center; justify-content: center;
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--nb-white);
    border: 2px solid var(--nb-border);
    flex-shrink: 0; overflow: hidden;
}
.navbar .lang-option .flag-img {
    width: 100%; height: 100%; object-fit: cover; display: block;
}
.navbar .lang-option.active .flag {
    border-color: var(--nb-primary);
    box-shadow: 0 0 0 2px rgba(29,113,184,.2);
}
.navbar .lang-option:hover .flag { border-color: var(--nb-primary); transform: scale(1.1); }

.navbar .lang-option .lang-name {
    font-size: .9375rem; font-weight: 500; color: var(--nb-dark);
}
.navbar .lang-option.active .lang-name { color: var(--nb-primary); font-weight: 600; }

/* ── Hamburguesa ──────────────────────────────────────────────────────── */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none; border: none; cursor: pointer;
    padding: 8px; z-index: 1001;
}
.mobile-menu-toggle span {
    width: 25px; height: 3px;
    background: var(--nb-primary);
    border-radius: 3px;
    transition: all .3s ease;
}
.mobile-menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(8px,8px); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(7px,-7px); }

/* ── Responsive ───────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .nav-logo { height: 45px; }

    .mobile-menu-toggle { display: flex; }

    .navbar .nav-menu {
        position: fixed;
        top: 70px; right: -100%;
        width: 280px;
        height: calc(100vh - 70px);
        background: rgba(255,255,255,.98);
        backdrop-filter: blur(10px);
        box-shadow: -2px 0 10px rgba(0,0,0,.1);
        flex-direction: column;
        padding: 2rem 1.5rem;
        gap: 0;
        transition: right .3s ease;
        overflow-y: auto;
        z-index: 999;
    }
    .navbar .nav-menu.active { right: 0; }

    .navbar .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--nb-border);
        padding: 0;
    }
    .navbar .nav-menu li:last-child { border-bottom: none; }

    .navbar .nav-menu a {
        display: block;
        padding: 1rem 0;
        font-size: 1rem;
    }
    .navbar .btn-nav {
        display: inline-block;
        margin: .5rem 0;
        text-align: center;
    }
    .navbar .language-selector { margin-top: 1rem; }
}