@import url('https://fonts.googleapis.com/css2?family=Asap:wght@500;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background: black;
}

div {
  height: 33.33vh;
}
#fahrenheit {
  border-top: 4px solid white;
  border-bottom: 4px solid white;
}

input[type='number'] {
  width: 100%;
  height: 100%;
  font-family: 'Asap', sans-serif;
  background: black;
  color: white;
  font-size: 10em;
  text-align: center;
  border: 0;
  outline: none;
}
/* chrome/opera/safari  */
::-webkit-input-placeholder {
  color: #222222;
}

/* firefox */
::-moz-placeholder {
  color: #222222;
}

/* edge*/
::-ms-input-placeholder {
  color: #222222;
}