:root {
  --primary: #1e40af;
  --primary-light: #3b82f6;
  --body-bg: #f8fafc;
  --text: #0f172a;
  --gray-200: #e5e7eb;
  --gray-500: #64748b;
  --gray-700: #374151;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--body-bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.55;
}

.wrap {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

.topbar {
  background: linear-gradient(135deg, #1e3a8a, var(--primary) 55%, var(--primary-light));
  color: #fff;
  padding: 40px 0 32px;
}

.topbar h1 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  letter-spacing: -0.01em;
}

.topbar .sub {
  margin: 6px 0 0;
  color: #dbeafe;
  font-size: 0.95rem;
}

main { padding: 28px 0 40px; }

.card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
  padding: 22px;
}

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--gray-200);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.card-head h2 {
  margin: 0;
  font-size: 1.05rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: #eff6ff;
  color: #1d4ed8;
  padding: 2px 6px;
  border-radius: 6px;
}

.count { color: var(--gray-500); font-size: 0.85rem; }

.gallery {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
}

.item {
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.item:hover {
  box-shadow: 0 6px 16px rgba(30, 64, 175, 0.14);
  transform: translateY(-2px);
}

.item a { display: block; color: inherit; text-decoration: none; }

.thumb {
  display: block;
  width: 100%;
  height: 150px;
  object-fit: contain;
  background: #f1f5f9;
}

.meta { padding: 10px 12px 12px; }

.name {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  word-break: break-all;
}

.size { display: block; color: var(--gray-500); font-size: 0.78rem; margin-top: 2px; }

.empty, .error { margin: 0; color: var(--gray-700); font-size: 0.92rem; }
.error { color: #b91c1c; }

.hint { margin: 18px 0 0; color: var(--gray-500); font-size: 0.82rem; }

.foot {
  padding: 0 20px 32px;
  color: var(--gray-500);
  font-size: 0.8rem;
}

@media (max-width: 480px) {
  .card { padding: 16px; }
  .gallery { grid-template-columns: 1fr 1fr; gap: 12px; }
  .thumb { height: 110px; }
}