:root {
  --text: #1a1a1a;
  --muted: #777;
  --bg: #ffffff;
  --accent: #0066cc;
  --border: #ececec;
  --code-bg: #f6f6f6;
  --max-width: 680px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e6e6e6;
    --muted: #8a8a8a;
    --bg: #111111;
    --accent: #6ea8ff;
    --border: #262626;
    --code-bg: #1a1a1a;
  }
}

* { box-sizing: border-box; }

html {
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0 1.5rem;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-feature-settings: "kern" 1, "liga" 1;
}

.site-header,
.site-main,
.site-footer .footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ---------- Header ---------- */

.site-header {
  padding: 2.2rem 0 1.4rem;
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.4rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.lang-switcher a {
  font-size: 0.85rem;
  font-variant: small-caps;
  letter-spacing: 0.05em;
}

/* ---------- Main ---------- */

.site-main {
  padding: 2rem 0 4rem;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin-top: 2em;
  margin-bottom: 0.6em;
  font-weight: 600;
}

h1 { font-size: 1.5rem; margin-top: 0.5em; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.05rem; }

p { margin: 0 0 1em; }

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

a:hover { border-bottom-color: currentColor; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

/* ---------- Homepage ---------- */

.intro h1 {
  font-size: 1.6rem;
  margin-bottom: 0.2em;
}

.intro .role {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 1.4em;
  font-size: 0.95rem;
}

.intro .bio {
  margin: 1.8rem 0 3rem;
  padding: 0.2em 0 0.2em 1.1em;
  border-left: 2px solid var(--border);
  color: var(--muted);
  font-style: italic;
}

.intro .bio p {
  margin: 0;
}

.intro .bio p + p {
  margin-top: 0.4em;
}

.intro .bio p.break {
  margin-top: 1.3em;
}

/* ---------- Post list ---------- */

.recent-posts h2,
.blog-list h1 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.92rem;
}

.post-list li {
  padding: 0.35rem 0;
  display: flex;
  gap: 1.4rem;
  align-items: baseline;
  flex-wrap: wrap;
}

.post-list time {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  min-width: 6rem;
}

.post-list a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  border-bottom: none;
  flex: 1;
}

.post-list a:hover {
  text-decoration-thickness: 2px;
  border-bottom: none;
}

.post-list .empty {
  color: var(--muted);
  font-style: italic;
}

.all-posts-link {
  display: inline-block;
  margin-top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
}

/* ---------- Single post ---------- */

.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  margin-top: 0;
  font-size: 1.55rem;
}

.post-meta {
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.post-meta .tag {
  margin-right: 0.4rem;
}

.post-content {
  font-size: 1rem;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.post-content blockquote {
  margin: 1.5em 0;
  padding-left: 1.2em;
  border-left: 3px solid var(--border);
  color: var(--muted);
}

.post-content code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.92em;
}

.post-content pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.5;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content ul,
.post-content ol {
  padding-left: 1.4em;
}

.post-content li { margin-bottom: 0.3em; }

.post-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.back-link {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 4rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-inner p { margin: 0; }

.footer-links {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--text); }

/* ---------- Responsive ---------- */

@media (max-width: 520px) {
  html { font-size: 14px; }
  body { padding: 0 1rem; }
  .site-header { padding-top: 1.4rem; }
  .post-list li { flex-direction: column; gap: 0.2rem; }
  .post-list time { min-width: 0; }
}