:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #d1d5db;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111827;
    --panel: #1f2937;
    --text: #f9fafb;
    --muted: #cbd5e1;
    --border: #475569;
    --accent: #60a5fa;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.gallery-shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.gallery-header,
.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.gallery-header {
  margin-bottom: 24px;
}

h1, h2, p {
  margin-top: 0;
}

.gallery-header p,
.viewer-info p {
  color: var(--muted);
}

.home-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

.viewer-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 28px;
}

.viewer {
  min-height: 420px;
  display: grid;
  place-items: center;
  background: #000;
}

.viewer img,
.viewer video {
  display: block;
  width: 100%;
  max-height: 650px;
  object-fit: contain;
}

.viewer-placeholder {
  color: #d1d5db;
  padding: 48px 20px;
  text-align: center;
}

.viewer-info {
  padding: 18px 20px 6px;
}

.filter-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-button {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 14px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.filter-button.active {
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 700;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 16px;
}

.media-item {
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--panel);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.media-item:hover,
.media-item:focus-visible {
  border-color: var(--accent);
}

.thumbnail {
  aspect-ratio: 16 / 10;
  width: 100%;
  object-fit: cover;
  display: block;
  background: #374151;
}

.thumbnail-fallback {
  aspect-ratio: 16 / 10;
  display: grid;
  place-items: center;
  background: #374151;
  color: #f9fafb;
  font-size: 2rem;
}

.media-label {
  padding: 12px;
}

.media-label strong,
.media-label small {
  display: block;
}

.media-label small {
  margin-top: 4px;
  color: var(--muted);
}

@media (max-width: 650px) {
  .gallery-shell {
    width: min(100% - 20px, 1100px);
    padding-top: 18px;
  }

  .viewer {
    min-height: 260px;
  }
}