.header-container {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 999;
    background-color: transparent;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.header-container.scrolled {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

body {
    padding-top: 0;
}

@media (min-width: 768px) {
    body {
        padding-top: 110px;
    }
}