*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: #1a1a1a;
  background: #ddd1d1;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  padding: 1rem 2rem 1rem;
}

header h1 {
  font-size: 1.625rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

header h1 a:hover {
  opacity: 0.6;
}

/* Homepage / Albums index — group grid */
.group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  grid-auto-rows: 1fr;
  gap: 0.75rem;
  padding: 0 2rem 3rem;
}

.group-card {
  display: flex;
  flex-direction: column;
  border-radius: 0;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.single-card:not(:has(.group-card-info)) {
  background: transparent;
  box-shadow: none;
}

.group-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.group-card img {
  width: 100%;
  flex: 1;
  display: block;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.group-card-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.45rem 0.6rem;
}

.group-card-info h2 {
  font-size: 0.8rem;
  font-weight: 600;
}

.photo-count {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.2rem;
  height: 1.2rem;
  background: #666;
  color: #fff;
  font-size: 0.525rem;
  font-weight: 600;
  flex-shrink: 0;
}

/* Album detail */
.album {
  padding: 0 2rem 3rem;
}

.album-header {
  margin-bottom: 1.5rem;
}

.album-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

.album-description {
  color: #555;
  margin-top: 0.25rem;
}

.photo-grid {
  columns: 3 280px;
  column-gap: 0.75rem;
}

.photo-thumb {
  display: block;
  break-inside: avoid;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.photo-thumb img {
  width: 100%;
  height: auto;
  display: block;
}

/* Individual photo page */
.photo-detail {
  padding: 0 2rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.breadcrumb {
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.breadcrumb a {
  color: #555;
}

.breadcrumb a:hover {
  color: #1a1a1a;
}

figure {
  margin-bottom: 1rem;
}

figure img {
  width: 100%;
  height: auto;
  max-height: calc(100vh - 10rem);
  object-fit: contain;
  display: block;
}

figcaption {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: #444;
}

.photo-pagination {
  display: flex;
  justify-content: space-between;
  padding-top: 1rem;
}

.photo-nav {
  font-size: 0.9rem;
  color: #555;
  min-width: 80px;
}

.photo-nav:hover {
  color: #1a1a1a;
}

.photo-nav-next {
  text-align: right;
}

/* EXIF metadata */
.exif-info {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  font-size: 0.8rem;
  color: #888;
  margin-bottom: 1rem;
}

@media (max-width: 640px) {
  header { padding: 1.25rem 1rem 0.75rem; }
  .group-grid { padding: 0 1rem 2rem; gap: 1rem; grid-template-columns: 1fr; }
  .album { padding: 0 1rem 2rem; }
  .photo-grid { columns: 2 150px; column-gap: 0.5rem; }
  .photo-detail { padding: 0 1rem 2rem; }
}