@keyframes gradient-anim{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.animate-gradient-bg{animation:gradient-anim 5s ease infinite alternate;background-size:400% 400%}.grayscale-mode{filter:grayscale(100%) contrast(120%)}.high-contrast-mode{filter:saturate(200%) contrast(200%) brightness(90%)}