header {
    position: fixed;
    z-index: 1000;
    top: 0;
    height: 6em;
    display: flex;
    width: 100%;
}

#header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: none !important;
}

#header.scrolled {
    height: 4em;
    background: white;
    /* Aşağı kaydırınca beyaz olacak */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1) !important;
    /* Hafif bir gölge efekti */
    padding: 15px 30px;
    /* Biraz küçülebilir */
    transition: background-color 0.3s ease-in-out, padding 0.3s ease-in-out;
}

.nav-item.scrolled {
    color: #505456 !important;
}

.header-logo {
    width: 5em;
}
.header-selected {
    color: #ff8800;
}