#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px 40px;
    background: transparent;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    font-family: 'Miriam Libre', sans-serif;
    font-size: 14px;
    color: #252525;
    text-decoration: none;
    letter-spacing: 1px;
    transition: color 0.3s, opacity 0.3s;
    opacity: 0.5;
}

.nav-links a.active {
    opacity: 1;
    font-weight: 700;
}

.nav-links a:hover {
    opacity: 1;
}

#navbar.dark-section .nav-links a {
    color: #fff;
}

#navbar.dark-section .nav-links a.active {
    color: #fff;
}

/* ── Dropdown Universo ── */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.nav-dropdown-toggle::after {
    content: '';
    display: inline-block;
    width: 5px;
    height: 5px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg) translateY(-1px);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.nav-dropdown:hover .nav-dropdown-toggle::after,
.nav-dropdown.open .nav-dropdown-toggle::after {
    transform: rotate(-135deg) translateY(2px);
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    min-width: 148px;
    list-style: none;
    /* padding-top funge da ponte invisibile tra il trigger e il card */
    padding: 10px 0 0 0;
    background: transparent;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
}

.nav-dropdown-menu::before {
    content: '';
    position: absolute;
    inset: 10px 0 0 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(18px);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.06);
    z-index: -1;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu li {
    list-style: none;
    padding: 0 5px;
}

.nav-dropdown-menu li:first-child { padding-top: 5px; }
.nav-dropdown-menu li:last-child  { padding-bottom: 5px; }

.nav-dropdown-menu a {
    display: block;
    padding: 9px 14px;
    border-radius: 7px;
    font-family: 'Miriam Libre', sans-serif;
    font-size: 13px;
    letter-spacing: 0.5px;
    color: #0F172A !important;
    opacity: 1 !important;
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s;
}

.nav-dropdown-menu a:hover {
    background: rgba(21, 101, 192, 0.07);
    color: #1565C0 !important;
    transform: none !important;
}

/* Mobile responsive */
@media (max-width: 768px) {
    #navbar {
        padding: 12px 20px;
    }

    .nav-logo {
        font-size: 18px;
        letter-spacing: 2px;
    }

    .nav-links {
        gap: 20px;
    }

    .nav-links a {
        font-size: 12px;
    }
}

@media (max-width: 640px) {
    #navbar {
        padding: 12px 16px;
    }

    .nav-logo {
        font-size: 16px;
        letter-spacing: 1px;
    }

    .nav-links {
        gap: 12px;
    }

    .nav-links a {
        font-size: 11px;
        letter-spacing: 0.5px;
    }
}

@media (max-width: 480px) {
    #navbar {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
    }

    .nav-links {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }
}