/* Film grain overlay */ .film-grain::after content: ''; position: fixed; top: -50%; left: -50%; right: -50%; bottom: -50%; width: 200%; height: 200%; background: transparent url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E") repeat; animation: film-grain 0.5s steps(10) infinite; pointer-events: none; z-index: 9999; opacity: 0.5;