body {
  font-family: system-ui, -apple-system, Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  padding: 1rem;
  background: #f4f4f4;
}

main {
  padding: 1rem;
  max-width: 900px;
  margin: auto;
}

a {
  text-decoration: none;
  color: #0066cc;
}

a:hover {
  text-decoration: underline;
}

.stamp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.stamp-card {
  border: 1px solid #ccc;
  border-radius: 8px;
  overflow: hidden;
  background: white;
}

.stamp-card img {
  width: 100%;
  height: auto;
  display: block;
}

.stamp-info {
  padding: 0.5rem;
}

@media (max-width: 600px) {
  main {
    padding: 0.5rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.2rem;
  }
}

.stamp-row {
  display: flex;
  margin-bottom: 50px;
}

.stamp-row:nth-child(even) {
  flex-direction: row-reverse;
}

.stamp-image img {
  width: 250px;
  margin: 20px;
}

.stamp-info {
  margin: 20px;
}

.country-disabled {
  color: gray;
}

.country-enabled {
  color: blue;
  text-decoration: none;
}

.country-enabled:hover {
  text-decoration: underline;
}