html, body {
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  height: 100dvh;
  background: #000;
  color: #888;
  font-family: "Courier New", Courier, monospace;
  padding: 20px;
  overflow: hidden;
}

h1 {
  font-size: 1.5rem;
  color: #bbb;
  margin: 0 0 0.5rem 0;
}

form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 300px;
  border: 1px solid #333;
  padding: 20px;
}

input[type="text"], button {
  background: #111;
  border: 1px solid #333;
  color: #bbb;
  padding: 6px 10px;
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

input[type="text"]:focus {
  border-color: #666;
}

button {
  cursor: pointer;
  background: #222;
}

button:hover {
  background: #333;
}