/* ── Variables ───────────────────────────────── */
:root {
  --bg:        #f8f6f1;
  --fg:        #1a1a18;
  --muted:     #7a7a72;
  --accent:    #c0392b;
  --border:    #dedad2;
  --code-bg:   #eeeae3;

  --font-body: "Georgia", "Times New Roman", serif;
  --font-mono: "JetBrains Mono", "Fira Mono", "Courier New", monospace;
  --font-sans: "Helvetica Neue", Helvetica, Arial, sans-serif;

  --width:     680px;
  --gap:       1.75rem;
}

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

/* ── Base ────────────────────────────────────── */
html { font-size: 18px; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.72;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

/* ── Header / Nav ────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
}

.nav {
  max-width: var(--width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-transform: uppercase;
}
.nav-logo:hover { text-decoration: none; color: var(--accent); }

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
}
.nav-links a:hover { color: var(--fg); text-decoration: none; }

/* ── Main ────────────────────────────────────── */
.main-content {
  flex: 1;
  max-width: var(--width);
  width: 100%;
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* ── Index / Home ────────────────────────────── */
.page-intro {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.page-intro h1 {
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.page-intro p {
  color: var(--muted);
  font-size: 1.05rem;
}

/* ── Post list ───────────────────────────────── */
.post-list { list-style: none; }

.post-list-item {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}

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

.post-list-date {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
  min-width: 6rem;
}

.post-list-title {
  font-size: 1rem;
  color: var(--fg);
}
.post-list-title:hover { color: var(--accent); text-decoration: none; }

/* ── Post ────────────────────────────────────── */
.post-header { margin-bottom: 2.5rem; }

.post-title {
  font-size: 1.9rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.post-date {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.post-tags {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  padding: 0.2em 0.55em;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ── Post content typography ─────────────────── */
.post-content > * + * { margin-top: 1.3em; }

.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: var(--font-sans);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.post-content h2 { font-size: 1.35rem; margin-top: 2.5em; }
.post-content h3 { font-size: 1.1rem;  margin-top: 2em; }
.post-content h4 { font-size: 0.9rem;  text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1.25rem;
  color: var(--muted);
  font-style: italic;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--code-bg);
  padding: 0.15em 0.35em;
  border-radius: 2px;
}

.post-content pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.25rem;
  overflow-x: auto;
}

.post-content pre code {
  background: none;
  padding: 0;
  font-size: 0.82em;
  line-height: 1.6;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 3px;
}

.post-content ul, .post-content ol {
  padding-left: 1.5rem;
}

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

/* ── Post nav ────────────────────────────────── */
.post-nav {
  max-width: var(--width);
  margin: 0 auto;
  padding: 2rem 2rem 3rem;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--muted);
}

/* ── Footer ──────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--muted);
}

.footer-inner {
  max-width: var(--width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-links { display: flex; gap: 1rem; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--fg); text-decoration: none; }

/* ── About page ──────────────────────────────── */
.about-content > * + * { margin-top: 1.3em; }

/* ── Responsive ──────────────────────────────── */
@media (max-width: 600px) {
  html { font-size: 16px; }
  .nav { flex-wrap: wrap; }
  .post-list-item { flex-direction: column; gap: 0.2rem; }
  .post-list-date { min-width: unset; }
  .post-nav { flex-direction: column; gap: 0.5rem; }
}