:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #1c1d22;
  --muted: #6b6e78;
  --line: #e4e2dc;
  --tag-bg: #f0eee8;
  --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121318;
    --surface: #1b1d24;
    --text: #eceef3;
    --muted: #9095a3;
    --line: #2a2d36;
    --tag-bg: #252832;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .3);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

.site-header, main, .site-footer {
  max-width: 1040px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

.site-header { padding-top: 56px; padding-bottom: 32px; }
.site-title { margin: 0; font-size: clamp(28px, 6vw, 44px); letter-spacing: .04em; }
.site-lead { margin: 4px 0 0; color: var(--muted); }

.game-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.game-card a {
  display: block;
  height: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform .15s ease;
}

.game-card a:hover, .game-card a:focus-visible { transform: translateY(-3px); }

.game-card img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--tag-bg);
}

.game-body { padding: 12px 14px 16px; }
.game-title { margin: 0; font-size: 18px; }
.game-desc { margin: 4px 0 10px; font-size: 14px; color: var(--muted); }

.game-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
}

.tag { background: var(--tag-bg); padding: 2px 8px; border-radius: 999px; }
.game-date { margin-left: auto; }
.empty { color: var(--muted); }

.site-footer { padding-top: 48px; padding-bottom: 32px; font-size: 12px; color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  .game-card a { transition: none; }
}