/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg:      #ffffff;
  --text:    #111111;
  --muted:   #757575;
  --faint:   #b0b0b0;
  --border:  #ebebeb;
  --subtle:  #f6f6f4;
  --max-w:   720px;
  --serif:   'DM Serif Display', Georgia, 'Times New Roman', serif;
  --sans:    'DM Sans', system-ui, -apple-system, sans-serif;
}

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

/* ── Base ───────────────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── Layout ─────────────────────────────────────────────── */
.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

/* ── Header ─────────────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.brand {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.nav-links a {
  font-size: 0.82rem;
  color: var(--muted);
  padding: 5px 10px;
  border-radius: 5px;
  transition: color 0.12s, background 0.12s;
}

.nav-links a:hover {
  color: var(--text);
  background: var(--subtle);
}

/* ── Main ───────────────────────────────────────────────── */
main.wrap { padding: 64px 32px 96px; }

/* ── Headings ───────────────────────────────────────────── */
h1 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.5vw, 1.85rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 32px;
}

h2 {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.25;
}

h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1.3;
}

/* ── Post list ──────────────────────────────────────────── */
.post-list { margin-top: 0; }

.post-summary {
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}

.post-summary:first-child { border-top: 1px solid var(--border); }

.post-summary h2 a,
.post-summary h3 a {
  color: var(--text);
  transition: color 0.12s;
}

.post-summary h2 a:hover,
.post-summary h3 a:hover { color: var(--muted); }

.post-summary .summary {
  margin-top: 8px;
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.6;
}

.post-summary .post-meta {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 12px;
  font-size: 0.76rem;
  color: var(--faint);
}

.tag { transition: color 0.12s; }
.tag:hover { color: var(--text); }

/* ── Landing ────────────────────────────────────────────── */
.landing-intro {
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.landing-intro h1 {
  font-size: clamp(2.5rem, 7vw, 4rem);
  line-height: 1.05;
  margin-bottom: 16px;
}

.landing-intro p {
  font-size: 1rem;
  color: var(--muted);
  max-width: 540px;
}

.all-posts-link {
  margin-top: 40px;
  font-size: 0.85rem;
  color: var(--muted);
}
.all-posts-link a:hover { color: var(--text); }

/* ── Post detail ────────────────────────────────────────── */
.post-header { margin-bottom: 48px; }

.post-header h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  margin-bottom: 16px;
}

.post-header .post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: 0.78rem;
  color: var(--faint);
}

.draft-banner {
  padding: 12px 18px;
  margin-bottom: 40px;
  background: var(--subtle);
  border-left: 3px solid var(--border);
  font-size: 0.875rem;
  color: var(--muted);
  border-radius: 0 4px 4px 0;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 72px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.post-nav a { transition: color 0.12s; }
.post-nav a:hover { color: var(--text); }

.back-link {
  display: inline-block;
  margin-top: 32px;
  font-size: 0.8rem;
  color: var(--faint);
  transition: color 0.12s;
}
.back-link:hover { color: var(--text); }

/* ── Pagination ─────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 48px;
  font-size: 0.85rem;
  color: var(--muted);
}

.feed-link {
  margin-top: 40px;
  font-size: 0.76rem;
  color: var(--faint);
}
.feed-link a:hover { color: var(--text); }

.back-link-wrap { margin-bottom: 40px; }

/* ── Prose ──────────────────────────────────────────────── */
.prose {
  font-size: 1.0rem;
  line-height: 1.8;
}

.prose p { margin-bottom: 1.4em; }
.prose h2 { font-size: 1.3rem; margin: 2.4em 0 0.6em; }
.prose h3 { margin: 2em 0 0.5em; }

.prose a {
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.12s;
}
.prose a:hover { text-decoration-color: var(--text); }

.prose ul, .prose ol { padding-left: 1.4em; margin-bottom: 1.4em; }
.prose li { margin-bottom: 0.4em; }

.prose blockquote {
  margin: 1.8em 0;
  padding: 0 0 0 24px;
  border-left: 2px solid var(--border);
  color: var(--muted);
  font-style: italic;
}

.prose pre {
  background: var(--subtle);
  border: 1px solid var(--border);
  padding: 18px 22px;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.65;
  border-radius: 4px;
  margin-bottom: 1.4em;
}

.prose code { font-size: 0.84em; background: var(--subtle); padding: 2px 5px; border-radius: 3px; }
.prose pre code { background: none; padding: 0; }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2.5em 0; }

/* ── Footer ─────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--faint);
}

.footer-links { display: flex; gap: 20px; }
.footer-links a { transition: color 0.12s; }
.footer-links a:hover { color: var(--text); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 560px) {
  main.wrap { padding: 48px 20px 72px; }
  .nav { height: 50px; }
  .post-summary { padding: 32px 0; }
  .post-nav { flex-direction: column; gap: 10px; }
  .landing-intro { padding-bottom: 48px; }
}