/* ==========================================================================
   S11.cz - NAV.CSS
   Popis: Hlavní navigace, Logo, Sticky efekt a mobilní menu
   ========================================================================== */

/* --- HLAVNÍ KONTEJNÉR NAVIGACE --- */
.main-nav {
    background: rgba(16, 20, 24, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: fixed; /* Fixní pozice nahoře */
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    height: 75px;
    display: flex;
    align-items: center;
}

.nav-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

/* --- LOGO A BRAND --- */
.nav-logo-link {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: opacity 0.2s;
}

.nav-logo-link:hover {
    opacity: 0.9;
}

.nav-logo-img {
    height: 42px;
    width: auto;
    filter: drop-shadow(0 0 5px var(--accent-glow));
}

.nav-logo-text {
    font-weight: 800;
    font-size: 1.6rem;
    color: #ffffff;
    letter-spacing: -1.5px;
    margin: 0;
}

/* --- MENU ODKAZY (DESKTOP) --- */
.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 25px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: 0.2s;
    position: relative;
}

.nav-link:hover {
    color: var(--accent);
    text-shadow: 0 0 10px var(--accent-glow);
}

/* --- VYHLEDÁVÁNÍ V NAVIGACI --- */
.nav-search input {
    background: var(--bg-main);
    border: 1px solid var(--border);
    color: #fff;
    padding: 8px 18px;
    border-radius: 25px;
    font-size: 0.85rem;
    width: 180px;
    transition: 0.3s;
}

.nav-search input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    width: 220px; /* Jemné rozšíření při focusu */
}

/* --- MOBILNÍ HAMBURGER (Tlačítko) --- */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.menu-toggle span {
    width: 100%;
    height: 2px;
    background: white;
    border-radius: 10px;
    transition: 0.3s;
}

/* Animace hamburgeru na křížek (při třídě .open) */
.menu-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --- RESPONZIVITA (Mobilní menu) --- */
@media (max-width: 992px) {
    .menu-toggle { 
        display: flex; 
    }

    .nav-menu {
        position: fixed;
        top: 75px;
        left: -100%; /* Schované vlevo */
        width: 100%;
        height: calc(100vh - 75px);
        background: var(--bg-surface);
        flex-direction: column;
        padding: 40px 20px;
        transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        gap: 30px;
        border-top: 1px solid var(--border);
    }

    .nav-menu.active {
        left: 0; /* Vysunutí menu */
    }

    .nav-link {
        font-size: 1.2rem; /* Větší odkazy na mobilu */
    }

    .nav-search input {
        width: 100%;
    }
    
    .nav-search-li {
        width: 100%;
        margin-top: 20px;
    }
}