body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: #fafafa;
  color: #222;
  margin: 0;
  padding: 0;
}

header {
  background-color: #ffffff;
  color: #111;
  padding: 2.5rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid #e5e5e5;
}

main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
  max-width: 1200px;
  margin: auto;
}

.card {
  background-color: #ffffff;
  border: 1px solid #e6e6e6;
  border-radius: 6px;
  padding: 1.2rem;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  transform: translateY(-3px);
  border-color: #cccccc;
}

.card h2 {
  margin-top: 0;
  font-size: 1.2rem;
  font-weight: 600;
  color: #000;
}

.card p {
  margin-bottom: 0.6rem;
  color: #555;
  font-size: 0.95rem;
}

.card a {
  display: inline-block;
  margin-top: 0.5rem;
  text-decoration: underline;
  color: #000;
  font-weight: normal;
}

.card a:hover {
  color: #555;
}

footer {
  text-align: center;
  padding: 1.5rem;
  background-color: #ffffff;
  color: #777;
  font-size: 0.85rem;
  border-top: 1px solid #e5e5e5;
}