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

:root {
  --bg: #ffffff;
  --surface: #f6f8fa;
  --border: #d0d7de;
  --accent: #0969da;
  --text: #1f2328;
  --text-dim: #656d76;
  --card-bg: #ffffff;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --card-size: 395px;
  --gallery-width: calc(var(--card-size) * 4 + 1.5rem * 3 + 3rem);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

.site-header {
  text-align: center;
  padding: 3rem 1.5rem 2rem;
}

.site-header h1 {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.site-header .mrglglgl {
  font-family: var(--font-mono);
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.gallery {
  max-width: var(--gallery-width);
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, var(--card-size));
  justify-content: center;
  gap: 1.5rem;
}

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

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

a.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.card:hover {
  border-color: #0969da;
}

.card-visual {
  aspect-ratio: 4 / 3;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.card-visual img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: var(--surface);
}

.card-info {
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.card-time {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
}

.card-date {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.card-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.15rem 0.5rem;
  border-radius: 2em;
  font-family: var(--font-mono);
}

.detail {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.detail-back {
  margin-bottom: 1rem;
}

.detail-back a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
}

.detail-back a:hover {
  text-decoration: underline;
}

.detail-visual {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  overflow: hidden;
}

.detail-visual img {
  width: 100%;
  display: block;
}

.detail-meta {
  margin-top: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.detail-meta div {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
}

.detail-meta div:first-child {
  border-top: 0;
}

.detail-meta dt {
  color: var(--text-dim);
  font-weight: 600;
}

.detail-meta dd {
  margin: 0;
}

.detail-meta dd.is-empty {
  color: var(--text-dim);
}

.site-footer {
  text-align: center;
  padding: 2rem 1.5rem 3rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  max-width: var(--gallery-width);
  margin: 0 auto;
}

@media (max-width: 720px) {
  .site-header h1 {
    font-size: 1.75rem;
  }

  .gallery {
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 1rem;
  }
}