:root {
  --bg: #fffdf9;
  --fg: #2b2b2b;
  --muted: #6b6b6b;
  --accent: #3a6ea5;
  --border: #e6e2da;
  --code-bg: #f3f1ec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --fg: #e8e6e1;
    --muted: #a0a0a0;
    --accent: #8ab4e8;
    --border: #3a3a3c;
    --code-bg: #2a2a2d;
  }
}
* { box-sizing: border-box; }
html { font-size: 17px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic Medium", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.9;
  letter-spacing: 0.02em;
  font-feature-settings: "palt";
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header, .site-main, .site-footer {
  max-width: 40em;
  margin: 0 auto;
  padding: 0 1.25rem;
}
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.site-title { font-weight: 700; font-size: 1.15rem; color: var(--fg); }
.site-nav a { font-size: 0.9rem; color: var(--muted); }
.site-main { padding-top: 2rem; padding-bottom: 3rem; }
.site-footer {
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

.intro { color: var(--muted); margin-bottom: 2rem; }
.post-list { list-style: none; padding: 0; margin: 0; }
.post-list__item {
  display: grid;
  grid-template-columns: 8.5em 1fr;
  gap: 0.5rem 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.post-list__date { color: var(--muted); font-size: 0.9rem; white-space: nowrap; }
.post-list__title { font-weight: 600; }
@media (max-width: 480px) {
  .post-list__item { grid-template-columns: 1fr; gap: 0.1rem; }
}

.page-title, .post__title {
  font-size: 1.5rem;
  line-height: 1.5;
  margin: 0 0 0.5rem;
}
.post__meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 2rem; }
.post__body h2 {
  font-size: 1.25rem;
  margin: 2.5rem 0 0.75rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--border);
}
.post__body h3 { font-size: 1.1rem; margin: 2rem 0 0.5rem; }
.post__body p { margin: 0 0 1.2em; }
.post__body p:empty { display: none; }
.post__body ul, .post__body ol { padding-left: 1.5em; }
.post__body blockquote {
  margin: 1.5em 0;
  padding: 0.25em 1em;
  border-left: 3px solid var(--border);
  color: var(--muted);
}
.post__body code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}
.post__body pre {
  background: var(--code-bg);
  padding: 1em;
  overflow-x: auto;
  border-radius: 4px;
}
.post__body pre code { background: none; padding: 0; }
.post__body hr { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }

.subscribe {
  margin-top: 3rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.subscribe__title { font-size: 1.1rem; margin: 0 0 0.5rem; }
.subscribe p { margin: 0 0 1rem; }
.empty { color: var(--muted); }

.thanks__body p { margin: 0 0 1.2em; }
.thanks__links {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.thanks__links a {
  display: inline-block;
  padding: 0.5em 1em;
  border: 1px solid var(--accent);
  border-radius: 4px;
}
.thanks__links a:hover { background: var(--accent); color: var(--bg); text-decoration: none; }