* {
  box-sizing: border-box;
  font-family: monospace;
}

body {
  margin: 0;
  height: 100vh;
  background: black;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  text-align: center;
}

h1 {
  letter-spacing: 2px;
  margin-bottom: 20px;
}

input {
  background: transparent;
  border: 1px solid white;
  color: white;
  padding: 10px;
  width: 220px;
  font-size: 16px;
  text-align: center;
  outline: none;
}

input::placeholder {
  color: #777;
}

button {
  margin-top: 15px;
  padding: 10px 20px;
  background: transparent;
  border: 1px solid white;
  color: white;
  cursor: pointer;
  font-size: 14px;
}

button:hover {
  background: white;
  color: black;
}

#message {
  margin-top: 15px;
  height: 20px;
  font-size: 14px;
}