.top-nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: transparent; 
    z-index: 1000;
    /* 🎯 Přidali jsme animaci i pro opacity (průhlednost) */
    transition: transform var(--transition-nav) ease, opacity var(--transition-nav) ease;
    transform: translateY(-100%);
    /* 🎯 Na hero stránce bude lišta kompletně neviditelná a neklikací */
    opacity: 0;
    pointer-events: none;
    filter: drop-shadow(var(--shadow-btn));
}

.top-nav.visible {
    transform: translateY(0);
    /* 🎯 Jakmile odscrolluješ z hero, lišta se plynule zviditelní a aktivuje */
    opacity: 1;
    pointer-events: auto;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px; 
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo-link {
    display: flex;
    align-items: center;
    cursor: pointer;
    position: relative;
}

.nav-logo {
    height: 45px; 
    width: auto;
    transition: transform var(--transition-speed);
}

.nav-logo:hover {
    transform: scale(1.05);
}

#nav-lightning-container {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 1;
    transition: opacity var(--transition-nav-slow) ease-out;
    /* 🎯 Agresivní pomalý fade-out na 0.8 vteřiny */
    transition: opacity 0.8s ease-out; 
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-item {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-speed);
    text-shadow: var(--shadow-card-text); 
}

.nav-item:hover, .nav-item.active {
    color: var(--accent-color);
    text-shadow: var(--shadow-nav-glow);
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-container { justify-content: center; }
}