button,a,div[role="button"],input[type="button"],input[type="submit"]{position:relative;overflow:hidden;transition:background .3s;user-select:none}button:active,a:active,div[role="button"]:active,input[type="button"]:active,input[type="submit"]:active{background-color:rgba(0,0,0,.1)}.ripple{position:absolute;background:rgba(255,255,255,0.5);border-radius:50%;transform:scale(0);animation:ripple-animation .6s linear}@keyframes ripple-animation{to{transform:scale(4);opacity:0}}