body {
  margin: 0;
  background: #0d0d0d;
  color: #fff;
  font-family: Arial, Helvetica, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.container {
  text-align: center;
  padding: 30px;
  border: 2px solid red;
  border-radius: 14px;
  max-width: 420px;
}

h1 {
  margin-top: 0;
}

p {
  line-height: 1.4;
}

button {
  background: red;
  color: #fff;
  border: none;
  padding: 15px 25px;
  font-size: 18px;
  border-radius: 10px;
  cursor: pointer;
}

button:hover {
  background: darkred;
}

small {
  display: block;
  margin-top: 15px;
  opacity: 0.7;
}