:root {
  --bg: #f7f5f1;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #0b3d2e;
  --rule: #d4cfc4;
  --max: 42rem;
  --font-sans: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-ui: "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-ui);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--fg);
  background:
    radial-gradient(ellipse at top left, #ebe6dc 0%, transparent 50%),
    linear-gradient(180deg, var(--bg), #efece6);
}

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

.site-header,
main,
.site-footer {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--rule);
}

.brand {
  font-family: var(--font-sans);
  font-size: 1.75rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

main {
  padding: 2rem 0 3rem;
}

.intro h1,
.post-header h1 {
  font-family: var(--font-sans);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 0.75rem;
  color: var(--fg);
}

.intro p {
  margin: 0;
  max-width: 36rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.summary {
  color: var(--muted);
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}

.post-list li {
  padding: 1.25rem 0;
  border-top: 1px solid var(--rule);
}

.post-list time,
.meta {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.post-list a {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--fg);
}

.post-list a:hover {
  color: var(--accent);
}

.post-list .summary {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
}

.empty {
  color: var(--muted);
  margin-top: 2rem;
}

.prose {
  margin-top: 1.75rem;
}

.prose h2 {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1rem;
}

.prose code {
  font-size: 0.9em;
  background: #e8e4db;
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.prose pre {
  overflow-x: auto;
  padding: 1rem;
  background: #1f2420;
  color: #e8e4db;
  border-radius: 4px;
}

.prose pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* Mermaid diagrams (converted from ```mermaid fences at page load) */
.prose .mermaid {
  margin: 0 0 1.25rem;
  padding: 1rem 0.5rem;
  overflow-x: auto;
  text-align: center;
  background: #f0ece4;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

.prose .mermaid svg {
  max-width: 100%;
  height: auto;
}

.back {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}

.site-footer {
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--muted);
}