:root {
  color-scheme: dark light;
  --bg: #0d0d0f;
  --fg: #e8e8ea;
  --dim: #8a8a92;
  --line: #26262b;
  --card: #151519;
  --accent: #7aa2f7;
  --fail: #ed4245;
  --radius: 10px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafafa;
    --fg: #1a1a1c;
    --dim: #65656d;
    --line: #e2e2e6;
    --card: #fff;
    --accent: #3355cc;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0 clamp(16px, 4vw, 48px) 64px;
  background: var(--bg);
  color: var(--fg);
  font:
    15px/1.6 ui-sans-serif,
    system-ui,
    'Segoe UI',
    sans-serif;
}

a {
  color: var(--accent);
}

/* ---------------------------------------------------------------- header */

.page-head {
  max-width: 720px;
  padding: 48px 0 24px;
}

.page-head h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 40px);
  letter-spacing: -0.02em;
}

.tagline {
  margin: 8px 0 16px;
  color: var(--dim);
}

.links {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
}

.meta {
  margin: 0;
  color: var(--dim);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------------- nav */

.group-nav {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: 12px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.group-nav a {
  color: var(--dim);
  text-decoration: none;
  font-size: 14px;
}

.group-nav a:hover,
.group-nav a:focus-visible {
  color: var(--fg);
}

/* --------------------------------------------------------------- gallery */

.group {
  padding-top: 8px;
}

.group h2 {
  margin: 40px 0 4px;
  font-size: 20px;
  scroll-margin-top: 64px;
}

.group .count {
  color: var(--dim);
  font-weight: normal;
  font-size: 15px;
}

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(min(360px, 100%), 1fr));
  margin-top: 16px;
}

.card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

.card.bad {
  border-color: var(--fail);
}

.card img {
  display: block;
  width: 100%;
  height: auto;
  /* A checkerboard, so a transparent render reads as transparent rather than
     as whatever the page background happens to be. */
  background:
    repeating-conic-gradient(#2a2a30 0% 25%, #1c1c22 0% 50%) 50% / 16px 16px;
}

@media (prefers-color-scheme: light) {
  .card img {
    background:
      repeating-conic-gradient(#e8e8ec 0% 25%, #f6f6f8 0% 50%) 50% / 16px 16px;
  }
}

.card figcaption {
  padding: 12px 14px;
}

.card .name {
  font-weight: 600;
}

.card .note {
  margin-top: 2px;
  color: var(--dim);
  font-size: 14px;
}

.card .stats {
  margin-top: 8px;
  color: var(--dim);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.card .error {
  margin-top: 8px;
  color: var(--fail);
  font-family: ui-monospace, monospace;
  font-size: 12px;
  word-break: break-word;
}

.missing {
  padding: 56px 12px;
  text-align: center;
  color: var(--fail);
}

.loading {
  padding: 48px 0;
  color: var(--dim);
}

/* --------------------------------------------------------------- footer */

.page-foot {
  max-width: 720px;
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 13px;
}

.page-foot p {
  margin: 0 0 8px;
}