body {background: azure;}
p#info {
  padding: 1em; margin: 0; border: 3px groove black; background: ivory;
  font-size: 300%;
}
button#push {width: 80vw; height: 5em;}
*.c {text-align: center;}
.login, .passcode {
  width: 20em; height: 10em; margin: 5em auto; border: 3px double black;
}
.hidden {display: none;}
.shrink {
  height: 0; transition: 0.5s; overflow: hidden; border: none; margin: 0;
}
.reply {background: #cff;}