.sticky-header{position:sticky;top:0;z-index:999;transition:transform 0.5s ease,box-shadow 0.3s ease;will-change:transform}.sticky-header.hide{transform:translateY(-100%)}.sticky-header.show{transform:translateY(0);box-shadow:0 4px 10px rgba(0,0,0,.1)}.logo-overlay{position:relative;overflow:hidden}.logo-overlay img{transition:transform 0.6s ease-in-out;display:block}.logo-overlay:hover img{transform:scale(1.1)}