/* Server-rendered pages (blog, docs): the "screening room" look of the landing, standalone. */
@font-face { font-family: 'Instrument Serif'; font-style: normal; font-weight: 400; font-display: swap; src: url('/fonts/instrument-serif-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family: 'Instrument Serif'; font-style: italic; font-weight: 400; font-display: swap; src: url('/fonts/instrument-serif-latin-400-italic.woff2') format('woff2'); }
@font-face { font-family: 'JetBrains Mono'; font-weight: 400; font-display: swap; src: url('/fonts/jetbrains-mono-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family: 'JetBrains Mono'; font-weight: 500 700; font-display: swap; src: url('/fonts/jetbrains-mono-latin-500-normal.woff2') format('woff2'); }
@font-face { font-family: Inter; font-weight: 400; font-display: swap; src: url('/fonts/inter-latin-400-normal.woff2') format('woff2'); }
@font-face { font-family: Inter; font-weight: 500 600; font-display: swap; src: url('/fonts/inter-latin-600-normal.woff2') format('woff2'); }
@font-face { font-family: Inter; font-weight: 700 800; font-display: swap; src: url('/fonts/inter-latin-700-normal.woff2') format('woff2'); }

:root {
  --ink: #0c0b0a;
  --ink-2: #151311;
  --ink-3: #1e1b18;
  --bone: #ede6d8;
  --bone-dim: #a39b8c;
  --bone-faint: #6f685e;
  --signal: #ff4d2e;
  --amber: #f2b33d;
  --rule: #2a2622;
  --serif: 'Instrument Serif', 'Times New Roman', serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: Inter, system-ui, -apple-system, 'Segoe UI', sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body.site { margin: 0; background: var(--ink); color: var(--bone); font: 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
.site a { color: inherit; }
.site em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--signal); }
.site ::selection { background: var(--signal); color: var(--ink); }

/* nav + footer, same as the app's public pages */
.sr-nav { position: sticky; top: 0; z-index: 40; display: flex; align-items: center; gap: 22px; padding: 14px clamp(16px, 4vw, 48px); border-bottom: 1px solid var(--rule); background: color-mix(in srgb, var(--ink) 86%, transparent); backdrop-filter: blur(10px); }
.lp-mark { display: inline-flex; align-items: baseline; gap: 12px; font-family: var(--serif); font-size: 28px; line-height: 1; text-decoration: none; letter-spacing: -0.3px; color: var(--bone); }
.lp-mark.small { font-size: 22px; margin-right: auto; }
.rec { display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: 10.5px; letter-spacing: 1.5px; color: var(--signal); }
.rec i { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 10px var(--signal); animation: blink 1.2s steps(1) infinite; display: inline-block; }
@keyframes blink { 50% { opacity: 0.15; } }
.lp-links { margin-left: auto; display: flex; align-items: center; gap: 24px; }
.lp-links > a:not(.lp-btn) { font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: 1.4px; text-decoration: none; color: var(--bone-dim); }
.lp-links > a:hover { color: var(--bone); }
.lp-btn { display: inline-flex; align-items: center; gap: 10px; height: 40px; padding: 0 18px; border: 1px solid var(--signal); background: var(--signal); color: var(--ink) !important; font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase; text-decoration: none; white-space: nowrap; transition: transform 0.15s, box-shadow 0.15s; }
.lp-btn:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--bone); }
.lp-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; padding: 28px clamp(16px, 4vw, 48px); border-top: 1px solid var(--rule); font-family: var(--mono); font-size: 12px; color: var(--bone-faint); }
.lp-foot a { color: var(--bone-dim); }
.lp-kicker, .ed-label, .post-meta { font-family: var(--mono); font-size: 12px; letter-spacing: 1.6px; text-transform: uppercase; color: var(--signal); }
.ed-label { color: var(--bone-faint); display: block; margin-bottom: 12px; }
.post-meta { color: var(--bone-faint); letter-spacing: 1px; text-transform: none; }
.post-meta a { color: var(--bone-dim); }

/* blog index */
.blog, .post { max-width: 1240px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px) 96px; }
.blog-head, .post-head { padding: clamp(56px, 9vw, 110px) 0 clamp(36px, 5vw, 56px); max-width: 920px; }
.blog-head h1, .post-head h1 { margin: 14px 0 18px; font-family: var(--serif); font-weight: 400; font-size: clamp(42px, 6.4vw, 84px); line-height: 0.98; letter-spacing: -1px; }
.post-head h1 { font-size: clamp(38px, 5.2vw, 68px); }
.lede { max-width: 62ch; margin: 0; font-size: 19px; color: var(--bone-dim); }
.post-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
.post-card { display: flex; flex-direction: column; gap: 12px; padding: 28px; min-height: 240px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); text-decoration: none; transition: background 0.15s; }
.post-card:hover { background: var(--ink-2); }
.post-card h2 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 30px; line-height: 1.08; }
.post-card:hover h2 { color: var(--signal); }
.post-card p { margin: auto 0 0; color: var(--bone-dim); font-size: 15px; }

/* post */
.post-grid { display: grid; grid-template-columns: 240px minmax(0, 720px); gap: clamp(32px, 5vw, 80px); border-top: 1px solid var(--rule); padding-top: 48px; }
.toc { position: sticky; top: 96px; align-self: start; }
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; border-left: 1px solid var(--rule); }
.toc li { counter-increment: toc; }
.toc a { display: block; padding: 6px 0 6px 16px; margin-left: -1px; border-left: 1px solid transparent; color: var(--bone-dim); text-decoration: none; font-size: 14px; line-height: 1.35; }
.toc a::before { content: counter(toc, decimal-leading-zero) '  '; font-family: var(--mono); font-size: 11px; color: var(--bone-faint); }
.toc a:hover { color: var(--bone); border-left-color: var(--signal); }
.prose { font-size: 17.5px; line-height: 1.72; }
.prose > *:first-child { margin-top: 0; }
.prose h2 { margin: 2.2em 0 0.6em; font-family: var(--serif); font-weight: 400; font-size: 38px; line-height: 1.08; letter-spacing: -0.3px; }
.prose h3 { margin: 1.8em 0 0.5em; font-size: 20px; line-height: 1.3; }
.prose .anchor { float: left; margin-left: -1em; width: 1em; color: var(--bone-faint); text-decoration: none; opacity: 0; font-family: var(--mono); font-size: 0.6em; padding-top: 0.35em; }
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.1em; }
.prose li { margin-bottom: 0.35em; }
.prose li::marker { color: var(--signal); }
.prose a { color: var(--bone); text-decoration-color: var(--signal); text-underline-offset: 3px; }
.prose a:hover { color: var(--signal); }
.prose strong { color: #fff; }
.prose blockquote { margin: 1.4em 0; padding: 4px 0 4px 22px; border-left: 2px solid var(--signal); color: var(--bone-dim); font-family: var(--serif); font-size: 24px; line-height: 1.35; }
.prose code { font-family: var(--mono); font-size: 0.86em; background: var(--ink-3); border: 1px solid var(--rule); padding: 1px 6px; }
.prose pre { margin: 1.4em 0; padding: 18px 20px; overflow-x: auto; background: var(--ink-2); border: 1px solid var(--rule); border-left: 2px solid var(--signal); font-size: 14px; line-height: 1.6; }
.prose pre code { background: none; border: 0; padding: 0; font-size: inherit; }
.prose img { max-width: 100%; height: auto; border: 1px solid var(--rule); }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2.4em 0; }
.table-wrap { margin: 1.4em 0; overflow-x: auto; border: 1px solid var(--rule); }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.45; }
.prose th, .prose td { padding: 10px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--rule); }
.prose th { font-family: var(--mono); font-size: 11.5px; font-weight: 500; letter-spacing: 1px; text-transform: uppercase; color: var(--bone-dim); background: var(--ink-2); }
.prose tr:last-child td { border-bottom: 0; }

.faq { margin-top: 3em; border-top: 1px solid var(--rule); }
.faq h2 { margin-top: 1.2em; }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 24px; padding: 18px 0; font-weight: 600; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; font-family: var(--mono); color: var(--signal); transition: transform 0.2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: -4px 0 18px; color: var(--bone-dim); }

.post-cta { display: flex; align-items: center; gap: 24px; margin: 3em 0 0; padding: 26px 28px; background: var(--ink-2); border: 1px solid var(--rule); border-left: 2px solid var(--signal); }
.post-cta div { display: flex; flex-direction: column; gap: 4px; }
.post-cta b { font-family: var(--serif); font-weight: 400; font-size: 26px; line-height: 1.1; }
.post-cta span { color: var(--bone-dim); font-size: 15px; }
.post-cta .lp-btn { margin-left: auto; }
.related { margin-top: 96px; }

@media (max-width: 900px) {
  .post-grid { grid-template-columns: minmax(0, 1fr); }
  .post-grid > aside:empty { display: none; }
  .toc { position: static; }
  .post-cta { flex-direction: column; align-items: flex-start; }
  .post-cta .lp-btn { margin-left: 0; }
}
@media (max-width: 640px) {
  .lp-links > a:not(.lp-btn) { display: none; }
  .lp-links > a[href='/blog'] { display: inline; }
  .lp-mark .rec { display: none; }
  .prose { font-size: 16.5px; }
  .prose h2 { font-size: 31px; }
  .post-list { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .rec i { animation: none; } html { scroll-behavior: auto; } }