:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #ffffff;
  --muted: #666666;
  --accent: #c0392b;
  --border: #e2e2e2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --bg: #121212;
    --muted: #a0a0a0;
    --border: #333333;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.8;
}

.site-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.site-title {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--fg);
  text-decoration: none;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem;
}

.ad-disclosure {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.6rem;
  margin-bottom: 1rem;
}

.meta {
  color: var(--muted);
  font-size: 0.85rem;
}

.post img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

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

#post-search {
  width: 100%;
  padding: 0.6rem 0.8rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list-item {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.post-list-item a {
  text-decoration: none;
  color: inherit;
}

.post-list-item h2 {
  margin: 0 0 0.3rem;
  font-size: 1.05rem;
}

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 2rem 1rem;
}