html, body {
  width: 100%;
}

body {
  padding-top: 2em;
  text-align: center;
}

h1 {
  font-size: 11em;
}

#num {
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
}

.expired {
  color: red;
  font-weight: bold;
}

span {
  font-size: 2em;
/*   font-style: italic; */
  font-weight: bold;
  text-shadow: -1px 0px 0px orange;
}

input {
  height: 2;
  font-size: 2em;
}

button {
  font-size: 2em;
}