/* Reset and Base Styles */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
  color: #222;
  line-height: 1.6;
}

/* Main Container */
main {
  max-width: 700px;
  margin: 80px auto;
  padding: 40px 24px;
  text-align: center;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Typography */
h1 {
  font-size: 3rem;
  font-weight: 800;
  margin: 0 0 30px 0;
  color: #000;
  letter-spacing: -1px;
}

p {
  font-size: 1.1rem;
  margin: 20px 0;
  color: #555;
  line-height: 1.8;
}

/* Card Container */
.card {
  background: white;
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07), 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.3s ease;
}

.card:hover {
  box-shadow: 0 8px 12px rgba(0, 0, 0, 0.1), 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Links */
a {
  color: #0066cc;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #0052a3;
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  p {
    font-size: 1rem;
  }

  main {
    margin: 40px auto;
    padding: 20px 16px;
  }

  .card {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }

  p {
    font-size: 0.95rem;
  }

  main {
    margin: 20px auto;
    min-height: auto;
  }
}