:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #171717;
  --muted: #666;
  --line: #e7e7e7;
  --accent: #111;
  --max: 880px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.68;
}
a { color: inherit; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(250,250,250,.94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { font-weight: 800; text-decoration: none; letter-spacing: -.02em; }
.nav-links { display: flex; gap: 18px; font-size: .95rem; }
.nav-links a { text-decoration: none; color: var(--muted); }
.nav-links a:hover { color: var(--text); }
.hero { padding: 88px 0 62px; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .75rem; color: var(--muted); font-weight: 700; }
h1 { font-size: clamp(2.25rem, 6vw, 4.8rem); line-height: 1.02; letter-spacing: -.055em; margin: 14px 0 18px; max-width: 820px; }
.hero p { max-width: 720px; font-size: 1.18rem; color: #3f3f3f; margin: 0 0 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.button {
  display: inline-block; text-decoration: none; border: 1px solid var(--accent);
  padding: 11px 16px; border-radius: 999px; font-weight: 700; font-size: .95rem;
  cursor: pointer; font-family: inherit; line-height: 1.2;
}
.button.primary { background: var(--accent); color: #fff; }
.button.secondary { background: transparent; }
.button.light { background: #fff; color: #111; border-color: #fff; }
.section { padding: 50px 0; border-top: 1px solid var(--line); }
.section h2 { font-size: clamp(1.55rem, 3vw, 2.4rem); letter-spacing: -.03em; margin: 0 0 12px; }
.section-intro { color: var(--muted); margin: 0 0 24px; max-width: 720px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: 20px; min-height: 180px;
}
.card h3 { margin: 8px 0 8px; font-size: 1.15rem; line-height: 1.25; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
.card .num { font-weight: 800; font-size: .8rem; color: #888; }
.article-card { text-decoration: none; display: block; transition: transform .12s ease, border-color .12s ease; }
.article-card:hover { transform: translateY(-2px); border-color: #cfcfcf; }
.tag { display: inline-block; font-size: .75rem; border: 1px solid var(--line); padding: 4px 8px; border-radius: 999px; color: var(--muted); }
.not-list { display: grid; gap: 12px; max-width: 760px; }
.not-item { display: flex; gap: 12px; align-items: flex-start; }
.not-item b { min-width: 92px; }
.beta { background: #111; color: #fff; border-radius: 18px; padding: 28px; }
.beta p { color: #d7d7d7; max-width: 690px; }
.beta .eyebrow { color: #aaa; }
.beta .small { color: #aaa; font-size: .9rem; margin-top: 18px; }
.steps { display: grid; gap: 8px; margin: 22px 0; color: #d7d7d7; }
.steps b { color: #fff; margin-right: 6px; }
.ai-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 8px; }
.copy-status { min-height: 1.5em; color: #bdbdbd; font-size: .9rem; margin-bottom: 14px; }
.prompt-details { margin-top: 14px; border-top: 1px solid #333; padding-top: 14px; }
.prompt-details summary { cursor: pointer; font-weight: 700; }
.prompt-box {
  width: 100%; min-height: 360px; margin-top: 14px; resize: vertical;
  border: 1px solid #3a3a3a; border-radius: 12px; padding: 14px;
  background: #191919; color: #e9e9e9; font: inherit; line-height: 1.55;
}
footer { border-top: 1px solid var(--line); margin-top: 40px; padding: 32px 0 48px; color: var(--muted); font-size: .9rem; }
.article-shell { max-width: 760px; margin: 0 auto; padding: 68px 22px 40px; }
.article-shell h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
.article-shell .dek { color: var(--muted); font-size: 1.1rem; margin: -4px 0 36px; }
.article-shell h2 { font-size: 1.5rem; line-height: 1.2; letter-spacing: -.025em; margin: 42px 0 14px; }
.article-shell p { margin: 0 0 18px; }
.article-shell ul { padding-left: 1.2rem; }
.article-shell li { margin: 6px 0; }
.article-shell strong { font-weight: 800; }
.callout { border-left: 3px solid #111; padding: 2px 0 2px 18px; margin: 26px 0; font-size: 1.05rem; }
.rule { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin: 28px 0; }
.sources { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 20px; font-size: .88rem; color: var(--muted); }
.sources a { color: var(--muted); }
.breadcrumb { font-size: .9rem; color: var(--muted); text-decoration: none; }
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 58px 0 42px; }
  .nav-links { gap: 12px; font-size: .88rem; }
  .article-shell { padding-top: 48px; }
  .prompt-box { min-height: 430px; font-size: .9rem; }
}