.icon{width:64px;vertical-align:top;border:1px solid salmon}button#increment{border:none;background:transparent;padding:0;cursor:pointer;outline:none}button#increment img{display:block;width:128px;height:128px;transition:transform .1s ease-in-out}button#increment:active img{transform:scale(.9)}button#increment:hover{transform:scale(1.1);transition:transform .1s ease-in-out}@keyframes flicker{0%,to{opacity:1}50%{opacity:.95}25%,75%{opacity:.97}}body{animation:flicker .15s infinite}h1{color:#ff00c8;text-shadow:0 0 5px #dcbc1e,0 0 10px #ec2fc3,0 0 20px #ffe23f;animation:flicker 2s infinite alternate}body{animation:flicker .15s infinite,rainbow-bg 10s linear infinite;background:linear-gradient(270deg,#ff0000,#ff7f00,#ffff00,#00ff00,#0000ff,#4b0082,#8f00ff);background-size:1400% 1400%;color:#fff;font-family:Optima,monospace}@keyframes rainbow-bg{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}