:root {
  --bg: #0a0a0b;
  --bg-elevated: #111113;
  --bg-surface: #18181b;
  --border: #27272a;
  --border-subtle: #1e1e21;
  --text: #fafafa;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  --accent: #345aed;
  --accent-hover: #3c64f0;
  --accent-text: #84a6fd;
  --green: #4ade80;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent-text); }
.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 2rem; }
.column { max-width: 720px; margin: 0 auto; }

/* ---- Nav ---- */
nav {
  padding: 1.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
}
.logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.logo span { color: var(--accent-text); }
.nav-links { display: flex; flex-wrap: wrap; gap: 0.25rem 0.5rem; align-items: center; }
.nav-links a {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-inline-size: 44px;
  min-height: 44px;
  padding-inline: 0.5rem;
  transition: color 0.2s;
}
@media (hover: hover) and (pointer: fine) {
  .nav-links a:hover { color: var(--text); }
}
.nav-links a.active { color: var(--accent-text); }
.nav-links a.nav-login { margin-left: 0.25rem; border: 1px solid var(--border); border-radius: 6px; padding-inline: 0.8rem; }

/* ---- Type ---- */
h1, h2, h3, h4 { font-family: var(--sans); font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; }
main { padding: 4rem 0 0; }
.page-head { margin-bottom: 3rem; }
.page-head h1 { font-size: 2.5rem; }
.page-head p { color: var(--text-secondary); margin-top: 0.75rem; font-size: 1.05rem; }
.meta { font-family: var(--mono); font-size: 0.75rem; color: var(--text-tertiary); letter-spacing: 0.02em; }
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; list-style: none; margin-top: 0.75rem; }
.tags a {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
}
@media (hover: hover) and (pointer: fine) {
  .tags a:hover { color: var(--text); border-color: var(--text-secondary); }
}

/* ---- Lists ---- */
.post-list { list-style: none; }
.post-list > li { padding: 2rem 0; border-top: 1px solid var(--border-subtle); }
.post-list > li:first-child { border-top: 0; padding-top: 0; }
.post-list h2 { font-size: 1.5rem; margin: 0.4rem 0 0.5rem; }
.post-list h2 a { color: var(--text); text-decoration: none; }
@media (hover: hover) and (pointer: fine) {
  .post-list h2 a:hover { color: var(--accent-text); }
}
.post-list p { color: var(--text-secondary); }
.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; font-family: var(--mono); font-size: 0.8rem; }
.pager a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
}
.empty { color: var(--text-secondary); }

/* ---- A post ---- */
.post-head { margin-bottom: 2.5rem; }
.post-head h1 { font-size: 2.6rem; margin: 0.5rem 0 1rem; }
.post-head .summary { color: var(--text-secondary); font-size: 1.15rem; }
.prose { font-size: 1.05rem; color: #e4e4e7; }
.prose > * + * { margin-top: 1.25rem; }
.prose h2 { font-size: 1.6rem; margin-top: 3rem; }
.prose h3 { font-size: 1.3rem; margin-top: 2.25rem; }
.prose h4 { font-size: 1.1rem; margin-top: 2rem; }
.prose ul, .prose ol { padding-left: 1.5rem; }
.prose li + li { margin-top: 0.4rem; }
.prose blockquote { border-left: 2px solid var(--accent); padding-left: 1rem; color: var(--text-secondary); }
.prose hr { border: 0; height: 1px; background: var(--border-subtle); margin: 3rem 0; }
.prose img { max-width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--border); }
.prose code { font-family: var(--mono); font-size: 0.88em; background: var(--bg-surface); border: 1px solid var(--border); border-radius: 4px; padding: 0.1em 0.35em; }
.prose pre {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  line-height: 1.7;
}
.prose pre code { background: none; border: 0; padding: 0; font-size: 0.82rem; color: var(--text-secondary); }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.95rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--border); padding: 0.5rem 0.75rem; text-align: left; }
.prose th { background: var(--bg-surface); }

/* ---- Highlighted code (highlight.js classes, written at render time) ---- */
.hljs-keyword, .hljs-selector-tag, .hljs-built_in, .hljs-name { color: var(--accent-text); }
.hljs-string, .hljs-attr, .hljs-symbol, .hljs-template-tag { color: #a8c7fa; }
.hljs-number, .hljs-literal, .hljs-type { color: var(--green); }
.hljs-comment, .hljs-quote, .hljs-meta { color: var(--text-tertiary); }
.hljs-title, .hljs-section, .hljs-function { color: #fafafa; font-weight: 500; }
.hljs-variable, .hljs-params, .hljs-tag { color: #d4d4d8; }

/* ---- Not found ---- */
.not-found { text-align: center; padding: 4rem 0; }
.not-found h1 { font-size: 2.5rem; }
.not-found p { color: var(--text-secondary); margin: 1rem 0 2rem; }
.btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
}
@media (hover: hover) and (pointer: fine) {
  .btn:hover { background: var(--accent-hover); }
}

/* ---- Footer ---- */
footer { border-top: 1px solid var(--border-subtle); padding: 2rem 0; margin-top: 6rem; }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-tertiary);
  font-family: var(--mono);
  font-size: 0.75rem;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: 0.35rem;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color 0.2s;
}
@media (hover: hover) and (pointer: fine) {
  .footer-links a:hover { color: var(--text); }
}

@media (max-width: 768px) {
  .container { padding: 0 1.25rem; }
  nav { padding: 1rem 0; flex-wrap: wrap; }
  main { padding-top: 2.5rem; }
  .page-head h1, .post-head h1 { font-size: 2rem; }
  .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}