* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: #f3f4f6;
  color: #111827;
}

.gallery-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid #d1d5db;
  background: #ffffff;
}

.gallery-header h1 {
  margin: 0;
  font-size: 1.25rem;
}

.app-link {
  display: inline-block;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  padding: 8px 12px;
  text-decoration: none;
  color: #111827;
  background: #ffffff;
}

main {
  padding: 20px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.gallery-tile {
  display: grid;
  grid-template-rows: 180px auto auto;
  gap: 12px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  background: #ffffff;
  padding: 12px;
}

.thumbnail-container {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #f9fafb;
  overflow: hidden;
}

.thumbnail-track {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  height: 100%;
}

.thumbnail-track[data-count="1"] {
  grid-template-columns: minmax(0, 1fr);
}

.thumbnail-track img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

.metadata-summary {
  font-size: 0.875rem;
  color: #374151;
  display: grid;
  gap: 4px;
}

.tile-actions {
  display: flex;
  gap: 8px;
}

.tile-actions button {
  border: 1px solid #d1d5db;
  border-radius: 6px;
  background: #ffffff;
  color: #111827;
  padding: 8px 10px;
  cursor: pointer;
}