* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #f5f7fb, #eaf0f8);
  color: #1f2937;
  min-height: 100vh;
}

.container {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 760px;
  background: #ffffff;
  border-radius: 18px;
  padding: 48px 32px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.brand {
  margin: 0 0 12px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #6b7280;
}

h1 {
  margin: 0 0 18px;
  font-size: 40px;
  line-height: 1.1;
}

.message {
  margin: 0;
  font-size: 18px;
  line-height: 1.7;
  color: #4b5563;
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .card {
    padding: 32px 20px;
  }

  h1 {
    font-size: 30px;
  }

  .message {
    font-size: 16px;
  }
}