* {margin:0;padding:0;box-sizing:border-box;}
body {
  background:#f7f4f4;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;
  padding:28px;
}
h2 {text-align:center;color:#222;margin-bottom:18px;font-size:2em;}
#textInput, #output {
  background:#fff;border-radius:8px;font-size:17px;line-height:1.7;margin-bottom:18px;padding:18px;border:2px solid #ddd;}
button {
  border-radius:7px; font-size:16px; border:none; background:#ff6d5a; color:#fff; font-weight:600; padding:7px 18px; margin-right:9px; margin-bottom:7px; cursor:pointer; transition:background .18s; }
button:hover { background:#cb523d; }