.fullscreen-cursor { display: none; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background-repeat: no-repeat; background-size: contain; background-position: center center; mix-blend-mode: multiply; pointer-events: none; z-index: 9999; opacity: 0; transition: opacity 0.3s ease; } body.show-fullscreen-cursor .fullscreen-cursor { display: block; opacity: 1; }