/* ================================
   NAVIGATION MIT BURGER-MENÜ
================================ */

/* Reserviert sofort (schon vor dem JS-Fetch) den Platz für die
   Navbar in Schwarz -> kein weißer "Flash" mehr beim Laden,
   dadurch bleibt der Burger (weiße Linien) immer sichtbar. */
#nav-placeholder {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-h, 100px);
    background-color: #000;
    z-index: 1000;
}

/* --- Navbar --- */
.navbar {
    background-color: #000;
    color: #fff;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    box-sizing: border-box;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    /* Hardware-Beschleunigung -> kein Ruckeln/Flackern beim Scrollen */
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* --- Logo --- */
.navbar .logo img {
    height: 85px;
    width: auto;
    object-fit: contain;
}

/* --- Nav Links --- */
.nav-links {
    list-style: none;
    display: flex;
    gap: 22px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: #fff;
    font-size: 1.15em;
    letter-spacing: 0.5px;
    text-decoration: none;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #1E90FF;
}

/* --- Burger Button --- */
.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1100;
    background: none;
    border: none;
    padding: 6px;
}

.burger div {
    width: 26px;
    height: 3px;
    background: #fff;
    transition: 0.3s;
}

/* Sperrt den Hintergrund, solange das Mobil-Menü offen ist
   -> kein Doppel-Scroll mehr hinter dem Menü */
body.nav-open {
    overflow: hidden;
}

/* --- Responsive --- */
@media (max-width: 850px) {
    .navbar .logo img { height: 70px; }

    .burger { display: flex; }

    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-h, 100px);
        left: 0;
        width: 100%;
        background-color: #000;
        flex-direction: column;
        align-items: center;
        gap: 25px;
        padding: 25px 0;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        z-index: 999;
        max-height: calc(100vh - var(--nav-h, 100px));
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav-links.active { display: flex; }
}

@media (max-width: 600px) {
    .navbar .logo img { height: 55px; }
}

@media (max-width: 420px) {
    .navbar .logo img { height: 48px; }
}

@media (prefers-reduced-motion: reduce) {
    .navbar { transform: none; }
}