.header-observer {
    height: 1px;
    width: 100%;
}


.header-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    z-index: 50;
}

.header-nav.sticky {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: slideDown 0.3s ease;
}

/* Slide down animation */
@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

body.nav-sticky {
    margin-top: 72px; /* nav height */
}