* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: Arial, sans-serif;
  background: #f5f7fb;
  color: #1f2937;
}

.container {
  text-align: center;
  padding: 2rem;
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  max-width: 540px;
}

h1 {
  margin-top: 0;
}

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

a:hover {
  text-decoration: underline;
}