/* Token Budget — notes on building with language models */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --text: #1c1b19;
  --muted: #6b6860;
  --line: #e7e4dc;
  --accent: #5b4bdb;
  --accent-soft: #eeebff;
  --code-bg: #f3f1ec;
  --radius: 14px;
  --sans: ui-sans-serif, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121211;
    --surface: #1a1a18;
    --text: #ecebe6;
    --muted: #9c998f;
    --line: #2b2a27;
    --accent: #a99cff;
    --accent-soft: #24213d;
    --code-bg: #1f1e1c;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
img, svg { max-width: 100%; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 700px; }

/* ---------- header ---------- */
.site-head { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 85%, transparent); position: sticky; top: 0; backdrop-filter: saturate(1.4) blur(10px); z-index: 10; }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 650; letter-spacing: -0.01em; }
.brand-mark { width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, #6a5cff, #c06cf0 60%, #ff9a7a); display: grid; place-items: center; color: #fff; font: 700 13px/1 var(--mono); }
.nav { display: flex; gap: 22px; font-size: 15px; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

/* ---------- hero ---------- */
.hero { padding: 72px 0 40px; }
.eyebrow { font: 600 12px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.hero h1 { font: 600 clamp(34px, 5vw, 52px)/1.1 var(--serif); letter-spacing: -0.02em; margin: 14px 0 16px; max-width: 760px; }
.hero p { color: var(--muted); font-size: 19px; max-width: 620px; margin: 0; }

/* ---------- post list ---------- */
.posts { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; padding: 24px 0 72px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: inherit; transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease; }
.card:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); box-shadow: 0 10px 30px -18px rgba(40, 30, 120, .35); }
.card h2 { font: 600 22px/1.25 var(--serif); margin: 0; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.card.featured { grid-column: 1 / -1; padding: 34px; background: linear-gradient(135deg, var(--accent-soft), var(--surface) 70%); }
.card.featured h2 { font-size: 30px; }
.meta { font: 13px/1.4 var(--mono); color: var(--muted); display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.tag { display: inline-block; padding: 2px 9px; border-radius: 99px; background: var(--accent-soft); color: var(--accent); font: 600 12px/1.6 var(--mono); }

/* ---------- article ---------- */
.post-head { padding: 64px 0 18px; }
.post-head h1 { font: 600 clamp(32px, 4.6vw, 46px)/1.12 var(--serif); letter-spacing: -0.02em; margin: 14px 0 14px; }
.post-head .lede { font-size: 20px; color: var(--muted); margin: 0 0 18px; }
.prose { padding-bottom: 40px; }
.prose h2 { font: 600 27px/1.25 var(--serif); margin: 2.2em 0 .6em; letter-spacing: -0.01em; }
.prose h3 { font-size: 19px; margin: 1.8em 0 .4em; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.15em; }
.prose li { margin: .3em 0; }
.prose blockquote { margin: 1.6em 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--accent); color: var(--muted); font-style: italic; }
.prose code { font: .88em var(--mono); background: var(--code-bg); padding: .12em .38em; border-radius: 6px; }
.prose pre { background: var(--code-bg); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; overflow-x: auto; font: 14px/1.6 var(--mono); margin: 1.4em 0; }
.prose pre code { background: none; padding: 0; font-size: inherit; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: 15px; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.prose th { font: 600 13px/1.4 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.callout { background: var(--accent-soft); border-radius: 12px; padding: 16px 20px; margin: 1.6em 0; font-size: 16px; }
.callout strong { color: var(--accent); }

.post-foot { border-top: 1px solid var(--line); padding: 28px 0 64px; display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; font-size: 15px; }
.post-foot a { text-decoration: none; }
.post-foot small { display: block; color: var(--muted); font: 12px var(--mono); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 4px; }

/* ---------- misc pages ---------- */
.page { padding: 64px 0 80px; }
.page h1 { font: 600 42px/1.15 var(--serif); letter-spacing: -0.02em; margin: 0 0 18px; }
.notfound { text-align: center; padding: 120px 0 140px; }
.notfound .code { font: 700 96px/1 var(--mono); background: linear-gradient(135deg, #6a5cff, #c06cf0 60%, #ff9a7a); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.site-foot .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 28px 24px 40px; }
.site-foot a { color: var(--muted); }

@media (max-width: 640px) {
  body { font-size: 16.5px; }
  .nav { gap: 16px; }
  .nav .hide-sm { display: none; }
  .hero { padding: 48px 0 24px; }
  .card.featured { padding: 26px; }
  .card.featured h2 { font-size: 25px; }
}