/* Reset */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: #f4f6f8;
  color: #222;
}

.wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.card {
  background: #ffffff;
  padding: 40px;
  max-width: 600px;
  width: 100%;
  border-radius: 6px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  text-align: center;
}

h1 {
  margin-top: 0;
  font-size: 28px;
}

.sub {
  margin: 15px 0 30px;
  color: #555;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  background: #003366;
  color: #ffffff;
  text-decoration: none;
  border-radius: 4px;
  font-weight: bold;
  transition: 0.2s ease;
}

.btn:hover {
  background: #0055a5;
}

.hint {
  margin-top: 25px;
  font-size: 14px;
  color: #777;
}