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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.7;
  color: #222;
  background: #fff;
  padding: 0 1rem;
}

a { color: #0066cc; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ── */
header, main, footer {
  max-width: 700px;
  margin: 0 auto;
}

header {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  padding: 2rem 0 1.5rem;
  border-bottom: 1px solid #eee;
  margin-bottom: 2rem;
}

header h1 { font-size: 1.4rem; }
header h1 a { color: #222; }
header nav { font-size: 0.9rem; }
header nav a { color: #555; }

footer {
  margin-top: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid #eee;
  font-size: 0.85rem;
  color: #888;
}

/* ── Post list (index) ── */
.year-section { margin-bottom: 2.5rem; }
.year-section h2 {
  font-size: 1rem;
  font-weight: 700;
  color: #888;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.year-section ul { list-style: none; }
.year-section li {
  display: flex;
  gap: 1rem;
  padding: 0.3rem 0;
  align-items: baseline;
}
.year-section .date {
  font-size: 0.85rem;
  color: #888;
  white-space: nowrap;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* ── Post content ── */
.post-meta {
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 2rem;
}

article h1 { font-size: 2rem; margin-bottom: 0.5rem; line-height: 1.3; }
article h2 { font-size: 1.4rem; margin: 2rem 0 0.75rem; }
article h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
article p  { margin-bottom: 1.25rem; }
article ul, article ol { margin: 0 0 1.25rem 1.5rem; }
article li { margin-bottom: 0.25rem; }
article blockquote {
  border-left: 3px solid #ddd;
  margin: 1.5rem 0;
  padding: 0.5rem 1.25rem;
  color: #555;
}
article img { max-width: 100%; height: auto; display: block; margin: 1.5rem 0; }
article pre {
  background: #f5f5f5;
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
}
article code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.875em;
}
article pre code { background: none; padding: 0; }
article :not(pre) > code {
  background: #f0f0f0;
  padding: 0.15em 0.35em;
  border-radius: 3px;
}
article hr { border: none; border-top: 1px solid #eee; margin: 2rem 0; }

/* ── Back link ── */
.back { display: inline-block; margin-bottom: 2rem; font-size: 0.9rem; color: #555; }