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

:root {
  --text: #1a1a1a;
  --muted: #555;
  --border: #ddd;
  --bg: #fff;
  --max-width: 720px;
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

html { font-size: 18px; }

body {
  font-family: var(--font-serif);
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 0;
  line-height: 1.7;
}

.site-header {
  padding: 2rem 1.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-header a {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}

.site-header a:hover { text-decoration: underline; }

nav {
  margin-top: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-right: 1.5rem;
  font-weight: 400;
}

nav a:hover { color: var(--text); }

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

h1 {
  font-family: var(--font-sans);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.5rem;
}

h2 {
  font-family: var(--font-sans);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2.5rem 0 0.75rem;
  line-height: 1.4;
}

h3 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  margin: 2rem 0 0.5rem;
}

p { margin: 0 0 1.25rem; }

a { color: var(--text); }

a:hover { color: #000; }

.subtitle {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.meta {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 2.5rem;
}

blockquote {
  border-left: 3px solid var(--border);
  margin: 1.5rem 0;
  padding: 0.25rem 1.25rem;
  color: var(--muted);
  font-style: italic;
}

blockquote p { margin-bottom: 0; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

ul, ol {
  padding-left: 1.5rem;
  margin: 0 0 1.25rem;
}

li { margin-bottom: 0.4rem; }

strong { font-weight: 700; }

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

.writing-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}

.writing-list li:first-child { border-top: 1px solid var(--border); }

.writing-list .item-title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
}

.writing-list .item-meta {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--muted);
  display: block;
  margin-bottom: 0.4rem;
}

.writing-list .item-desc {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0;
}

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

.book-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}

.book-list li:first-child { border-top: 1px solid var(--border); }

.book-list .item-title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
}

.book-list .item-meta {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--muted);
  display: block;
  margin-bottom: 0.4rem;
}

.download-link {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  text-decoration: none;
  color: var(--muted);
}

.download-link:hover {
  border-color: var(--text);
  color: var(--text);
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 600px) {
  html { font-size: 16px; }
  main { padding: 2rem 1rem 3rem; }
  .site-header { padding: 1.5rem 1rem 1rem; }
}