html,
body,
input,
textarea,
button {
  font-family: monospace;
  background-color: #111;
  color: #ddd;
  margin: 0;
  padding: 0;
}
div {
  margin-top: 1rem;
}
span {
  padding-left: 1rem;
}
p {
  margin: 0;
  padding: 0;
}
input {
  display: block;
  width: 10rem;
  box-sizing: border-box;
}
iframe {
  width: 49%;
  height: 49vh;
  border-style: none;
}
.container {
  width: 100vw;
  height: 100vh;
  display: flex;
}