:root {
  --bg: #fbfaf7;
  --fg: #1a1a1a;
  --fg-muted: #5a5a5a;
  --accent: #2a5cdc;
  --border: #e5e2db;
  --card: #ffffff;
  --shadow: 0 1px 2px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
  --radius: 10px;
  --maxw: 760px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --bg: #0f1115;
  --fg: #f1efe9;
  --fg-muted: #9aa0aa;
  --accent: #7aa2f7;
  --border: #2a2e36;
  --card: #161922;
  --shadow: 0 1px 2px rgba(0,0,0,0.4), 0 4px 12px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
}

.brand {
  font-weight: 600;
  color: var(--fg);
  font-size: 1rem;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}
.site-nav a {
  color: var(--fg-muted);
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--fg); text-decoration: none; }

#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  border-radius: var(--radius);
  padding: 0.25rem 0.55rem;
  cursor: pointer;
  font-size: 0.9rem;
}
#theme-toggle:hover { color: var(--fg); }

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.hero {
  padding: 3.5rem 0 2.5rem;
}
.eyebrow {
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  margin: 0 0 0.5rem;
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
.lede {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 38em;
}
.hero-cta {
  margin-top: 1.75rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  border: 1px solid var(--border);
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.btn-primary:hover { text-decoration: none; opacity: 0.92; }
.btn-ghost {
  background: transparent;
  color: var(--fg);
}
.btn-ghost:hover { text-decoration: none; background: var(--card); }

.section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}
.section h2 {
  font-size: 1.5rem;
  margin: 0 0 1.5rem;
  letter-spacing: -0.01em;
}

.project-grid {
  display: grid;
  gap: 1rem;
}
.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
}
.project-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
}
.project-meta {
  color: var(--fg-muted);
  font-size: 0.85rem;
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
}
.project-card p { margin: 0 0 1rem; }
.project-links {
  display: flex;
  gap: 1rem;
  font-size: 0.95rem;
}

.timeline {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  display: grid;
  gap: 1.25rem;
}
.timeline li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  align-items: baseline;
}
.timeline .when {
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.timeline .what h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}
.timeline .what p {
  margin: 0;
  color: var(--fg-muted);
}

.site-footer {
  max-width: var(--maxw);
  margin: 3rem auto 2rem;
  padding: 1.5rem 1.25rem 0;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  color: var(--fg-muted);
  font-size: 0.9rem;
}
.footer-links { display: flex; gap: 1rem; }
.footer-links a { color: var(--fg-muted); }
.footer-links a:hover { color: var(--fg); text-decoration: none; }

/* Blog */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.25rem;
}
.post-list li {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.25rem;
}
.post-list li:last-child { border-bottom: none; }
.post-list h3 { margin: 0 0 0.25rem; font-size: 1.15rem; }
.post-list .date {
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.post {
  padding: 2rem 0;
}
.post header.post-header { margin-bottom: 2rem; }
.post h1 { font-size: 2rem; letter-spacing: -0.02em; margin: 0 0 0.5rem; }
.post .post-meta {
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.post p, .post ul, .post ol { line-height: 1.7; }
.post pre {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.post code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--card);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
.post pre code { background: none; padding: 0; }
.post blockquote.epigraph {
  margin: 0 0 2rem;
  padding: 0 0 0 1.25rem;
  border-left: 3px solid var(--border);
  color: var(--fg-muted);
  font-style: italic;
}
.post blockquote.epigraph p { margin: 0 0 0.5rem; }
.post blockquote.epigraph .attribution {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

@media (max-width: 560px) {
  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
  .site-nav { gap: 0.85rem; }
  .site-nav a { font-size: 0.9rem; }
}