.header {
    top: 0;
    left: 0;
    width: 100%;
    background: #9CAF88;
    z-index: 101;
    border-bottom: solid 2px #4B4B4D;
    height: auto;
}

.logo {
    width: 100%;
    height: 5rem;/* feste Höhe relativ zur Viewport-Höhe */
    object-fit: cover;    /* Bild füllt die Box, ohne zu verzerren */
    object-position: center top; /* Bereich oben abschneiden, mittig horizontal */
    display: block;
}

.header_content {
    width: 100%;
}

.main_nav {
    height: auto;
    font-weight: bold;
    transition: transform 1s linear;
}

.main_nav ul {
    overflow-x: auto;
    white-space: nowrap;
    flex-wrap: nowrap;
}

.header.scrolled .logo {
    transform: translateY(-100%);
    opacity: 0;
}



.main_nav ul li {
    flex: 0 0 auto;
}

.main_nav ul {
    padding: 0 10px;
}

.header.scrolled {
    height: auto;
}


.header.scrolled .main_nav {

    transform: translateY(-7px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #9CAF88;
    z-index: 101;
    border-bottom: solid 2px #4B4B4D;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.logo {
    transition: transform 1s linear, opacity 1s linear;
}

.main_nav ul li a:hover {
    color: #4B4B4D
}