:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --ink: #0b1220;
  --ink-soft: #475569;
  --ink-faint: #94a3b8;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --rule: rgba(11, 18, 32, 0.08);
  --sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Helvetica, Arial, sans-serif;
  --serif: 'Iowan Old Style', Charter, 'Palatino Linotype', Palatino, Georgia, serif;
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--serif);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }

/* Header */
.site-header {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 24px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 18px;
}
.brand-name { font-family: var(--sans); font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }

.site-nav { display: flex; gap: 22px; font-family: var(--sans); font-size: 14px; }
.site-nav a { text-decoration: none; color: var(--ink-soft); font-weight: 500; }
.site-nav a:hover { color: var(--accent); }

/* Main */
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 96px;
}

/* Hero (homepage) */
.hero { margin-bottom: 56px; padding-top: 24px; }
.hero-title {
  font-family: var(--sans);
  font-size: clamp(36px, 5.5vw, 52px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
}
.hero-lede {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--ink-soft);
  max-width: 56ch;
}

/* Post cards on homepage */
.posts { display: flex; flex-direction: column; gap: 56px; }
.post-card { padding-bottom: 56px; border-bottom: 1px solid var(--rule); }
.post-card:last-child { border-bottom: none; padding-bottom: 0; }
.post-card-image {
  display: block;
  margin-bottom: 18px;
  border-radius: 10px;
  overflow: hidden;
  background: var(--ink-faint);
}
.post-card-image img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.post-card-image:hover img { opacity: 0.92; }

.post-card-meta {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-faint);
  margin-bottom: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.post-card-meta .sep { color: var(--ink-faint); }
.post-card-meta .tag { color: var(--ink-faint); }
.post-card-title {
  font-family: var(--sans);
  font-size: clamp(22px, 2.8vw, 28px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}
.post-card-title a { text-decoration: none; color: var(--ink); }
.post-card-title a:hover { color: var(--accent); }
.post-card-desc { color: var(--ink-soft); }

.empty-state { color: var(--ink-faint); font-style: italic; text-align: center; padding: 48px 0; }

/* Post page */
.post-hero {
  margin: -32px -24px 32px;
  border-radius: 0;
  overflow: hidden;
  background: var(--ink-faint);
}
.post-hero img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
@media (min-width: 800px) {
  .post-hero { margin: 0 0 32px; border-radius: 12px; }
}

.post-header { margin-bottom: 40px; }
.post-meta {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-faint);
  margin-bottom: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.post-tag-sep, .post-tag { color: var(--ink-faint); }
.post-title {
  font-family: var(--sans);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.post-lede { font-size: 20px; color: var(--ink-soft); font-style: italic; line-height: 1.5; }

.post-body { font-size: 18px; }
.post-body h2 { font-family: var(--sans); font-size: 26px; font-weight: 700; margin: 44px 0 14px; letter-spacing: -0.015em; }
.post-body h3 { font-family: var(--sans); font-size: 20px; font-weight: 600; margin: 30px 0 10px; }
.post-body p { margin-bottom: 22px; }
.post-body ul, .post-body ol { margin: 0 0 22px 26px; }
.post-body li { margin-bottom: 6px; }
.post-body blockquote { border-left: 3px solid var(--accent); padding: 4px 18px; margin: 24px 0; font-style: italic; color: var(--ink-soft); }
.post-body code { font-family: var(--mono); font-size: 0.88em; background: var(--accent-soft); padding: 2px 6px; border-radius: 4px; color: var(--ink); }
.post-body pre { background: #0b1220; color: #e2e8f0; padding: 18px 20px; border-radius: 8px; overflow-x: auto; margin: 24px 0; font-size: 14px; line-height: 1.55; }
.post-body pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.post-body hr { border: none; border-top: 1px solid var(--rule); margin: 44px 0; }
.post-body img { max-width: 100%; height: auto; border-radius: 8px; margin: 22px 0; }
.post-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; font-family: var(--sans); }
.post-body th, .post-body td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--rule); }
.post-body th { background: var(--accent-soft); font-weight: 600; }

/* FAQ section */
.post-faq {
  margin-top: 56px;
  padding: 32px;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--rule);
}
.post-faq h2 {
  font-family: var(--sans);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: -0.015em;
}
.post-faq dl { font-size: 16px; }
.post-faq .faq-item { padding: 18px 0; border-bottom: 1px solid var(--rule); }
.post-faq .faq-item:last-child { border-bottom: none; padding-bottom: 0; }
.post-faq .faq-item:first-child { padding-top: 0; }
.post-faq dt { font-family: var(--sans); font-weight: 600; color: var(--ink); margin-bottom: 6px; font-size: 16px; }
.post-faq dd { color: var(--ink-soft); }

.post-divider { border: none; border-top: 1px solid var(--rule); margin: 56px 0 24px; }
.post-disclosure { font-family: var(--sans); font-size: 13px; color: var(--ink-faint); font-style: italic; line-height: 1.55; }

/* Generic page */
.page h1 { font-family: var(--sans); font-size: clamp(28px, 4vw, 36px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 28px; }
.page h2 { font-family: var(--sans); font-size: 20px; font-weight: 600; margin: 30px 0 10px; }
.page p { margin-bottom: 14px; }
.page ul { margin: 0 0 20px 24px; }
.page li { margin-bottom: 6px; }

/* Footer */
.site-footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 24px;
  border-top: 1px solid var(--rule);
  text-align: center;
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-faint);
}
.site-footer a { color: var(--ink-faint); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }