:root {
  --bg: #fff;
  --ink: #172033;
  --muted: #5e6779;
  --border: #e8e7ef;
  --accent: #6d28d9;
  --tint: #f6f3fc;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; scroll-padding-top: 100px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: 'Inter', system-ui, sans-serif; line-height: 1.65; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 4px; }
img { max-width: 100%; display: block; }
h1, h2, h3, p { margin: 0; }
.container, .header-inner { max-width: 1160px; margin-inline: auto; padding-inline: 28px; }
.skip-link { position: fixed; top: 10px; left: 16px; padding: 10px 18px; background: var(--ink); color: #fff; transform: translateY(-160%); z-index: 20; }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--border); background: rgba(255, 255, 255, .96); }
.header-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 750; letter-spacing: -.5px; }
.brand img { image-rendering: pixelated; }
.brand-dot, .accent { color: var(--accent); }
.site-nav { display: flex; align-items: center; gap: 28px; font-size: 14px; font-weight: 550; }
.site-nav > a:hover, .site-nav > a[aria-current], .back-link:hover, .text-link:hover { color: var(--accent); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; padding: 13px 22px; border: 1px solid var(--accent); border-radius: 10px; background: var(--accent); color: #fff; font-size: 15px; font-weight: 600; }
.button:hover, .site-nav > .button:hover { background: #5520ad; color: #fff; }
.button-small { padding: 9px 15px; font-size: 13px; }
.blog-intro { padding: 88px 0 70px; }
.eyebrow, .section-kicker { color: var(--accent); font-size: 12px; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; }
.blog-intro h1 { margin: 20px 0 24px; font-size: clamp(44px, 6.5vw, 76px); font-weight: 650; letter-spacing: -.055em; line-height: 1.08; }
.lead { color: var(--muted); font-size: 19px; line-height: 1.7; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; border-top: 1px solid var(--border); padding: 24px 0; }
.section-heading h2 { font-size: 17px; font-weight: 600; }
.section-heading > span { color: var(--muted); font-size: 12px; }
.featured-post { border: 1px solid var(--border); border-radius: 20px; overflow: hidden; }
.featured-post + .featured-post { margin-top: 24px; }
.published-article { max-width: 800px; margin-inline: auto; }
.published-article > img { width: 100%; border-radius: 16px; margin-bottom: 32px; }
.published-article .prose { overflow-wrap: anywhere; }
.published-article .prose h2 { margin-top: 32px; }
.published-article .prose pre { overflow-x: auto; padding: 16px; background: var(--tint); border-radius: 10px; }
.published-article .prose table { display: block; overflow-x: auto; border-collapse: collapse; }
.published-article .prose td, .published-article .prose th { border: 1px solid var(--border); padding: 8px; }
.post-link { display: grid; grid-template-columns: 1fr 1.1fr; }
.post-link:focus-visible { outline-offset: -4px; border-radius: 20px; }
.post-art { padding: 36px 40px; background: radial-gradient(ellipse at top left, #e8ddff, transparent 80%), #f4f0fc; display: flex; flex-direction: column; gap: 12px; }
.art-label, .art-footer { font-size: 12px; color: #665582; }
.art-label { margin-bottom: 12px; }
.art-footer { margin-top: 12px; text-align: right; }
.mode-tile { display: flex; align-items: center; gap: 18px; padding: 17px 20px; border: 1px solid #e7dff4; border-radius: 12px; background: rgba(255, 255, 255, .88); }
.mode-number { font-size: 11px; color: #79678f; font-variant-numeric: tabular-nums; }
.mode-tile strong { display: block; font-size: 22px; letter-spacing: -.04em; line-height: 1.2; }
.mode-tile div > span { font-size: 12px; color: var(--muted); }
.tile-arrow { margin-left: auto; color: var(--accent); font-size: 22px; }
.post-summary { padding: 40px; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; color: var(--muted); font-size: 12px; }
.tag { padding: 4px 10px; background: var(--tint); color: var(--accent); border-radius: 6px; font-weight: 600; }
.post-summary h3 { margin: 24px 0 18px; font-size: clamp(24px, 2.8vw, 34px); font-weight: 600; line-height: 1.25; letter-spacing: -.035em; }
.post-summary > p { color: var(--muted); font-size: 15px; }
.read-link { margin-top: 30px; display: inline-flex; gap: 18px; color: var(--accent); font-weight: 600; font-size: 14px; }
.post-link:hover .read-link { text-decoration: underline; text-underline-offset: 5px; }
.bottom-note { display: flex; align-items: center; gap: 22px; margin: 48px 0 88px; padding: 28px 0; }
.note-mark { color: var(--accent); font-size: 36px; }
.bottom-note p { font-size: 15px; }
.bottom-note p span { color: var(--muted); font-size: 13px; }
.text-link { margin-left: auto; font-size: 13px; font-weight: 600; white-space: nowrap; }
.site-footer { border-top: 1px solid var(--border); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; padding-block: 28px; color: var(--muted); font-size: 12px; }
.footer-brand { font-size: 16px; font-weight: 700; color: var(--ink); }
.footer-inner > a:last-child { margin-left: auto; }
.article-page { padding-top: 36px; padding-bottom: 80px; }
.back-link { display: inline-block; color: var(--muted); font-size: 13px; }
.article-header { max-width: 900px; padding: 48px 0; }
.article-header h1 { margin: 22px 0; font-size: clamp(34px, 5vw, 58px); line-height: 1.12; letter-spacing: -.045em; font-weight: 650; }
.article-header .lead { max-width: 760px; }
.article-layout { display: grid; grid-template-columns: 240px minmax(0, 720px); gap: 56px; align-items: start; padding-top: 40px; border-top: 1px solid var(--border); }
.toc { position: sticky; top: 112px; display: flex; flex-direction: column; align-items: flex-start; gap: 14px; font-size: 13px; }
.toc p { margin-bottom: 4px; font-weight: 650; color: var(--ink); }
.toc a { color: var(--muted); }
.toc a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.prose { min-width: 0; font-size: 17px; line-height: 1.85; }
.prose p + p { margin-top: 18px; }
.prose section { margin-top: 48px; }
.prose h2 { margin-bottom: 18px; font-size: 28px; line-height: 1.3; letter-spacing: -.03em; font-weight: 650; }
.prose .section-kicker { margin-bottom: 10px; }
.prose blockquote { margin: 24px 0; padding: 18px 24px; border-left: 3px solid #a78bfa; border-radius: 0 10px 10px 0; background: var(--tint); font-size: 16px; line-height: 1.8; }
.prose .demo-note { margin-top: 24px; padding: 16px 20px; border: 1px solid var(--border); border-radius: 10px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.prose h3 { margin: 32px 0 14px; font-size: 21px; line-height: 1.4; letter-spacing: -.02em; }
.interface-figure { margin: 28px 0 32px; }
.interface-figure > a { display: block; overflow: hidden; border: 1px solid var(--border); border-radius: 12px; background: #f8f9fb; box-shadow: 0 8px 28px #1720330a; cursor: zoom-in; }
.interface-figure > a:hover { border-color: #a78bfa; }
.interface-figure img { width: 100%; height: auto; }
.interface-figure figcaption { margin-top: 12px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.interface-figure figcaption > span { display: block; margin-bottom: 3px; color: var(--accent); font-size: 11px; font-weight: 650; letter-spacing: .06em; text-transform: uppercase; }
.takeaway { margin-top: 40px; padding: 28px; border: 1px solid var(--border); border-radius: 14px; }
.takeaway h2 { font-size: 21px; }
.takeaway dl { margin: 0; font-size: 15px; }
.takeaway dl > div { display: grid; grid-template-columns: 70px 1fr; gap: 16px; padding: 12px 0; }
.takeaway dl > div + div { border-top: 1px solid var(--border); }
.takeaway dt { color: var(--accent); font-weight: 650; }
.takeaway dd { margin: 0; }
.use-cases { margin: 22px 0; padding-left: 22px; }
.use-cases li { padding-left: 4px; margin-bottom: 18px; }
.use-cases li::marker { color: var(--accent); }
.article-cta { margin: 48px 0 28px; padding: 32px; border-radius: 16px; background: var(--tint); }
.article-cta h2 { margin: 12px 0; }
.article-cta > p:not(.eyebrow) { color: var(--muted); font-size: 15px; }
.article-cta .button { margin-top: 24px; }
@media (max-width: 900px) {
  .post-summary, .post-art { padding: 28px; }
  .article-layout { grid-template-columns: 190px minmax(0, 1fr); gap: 30px; }
}
@media (max-width: 720px) {
  .container, .header-inner { padding-inline: 20px; }
  .header-inner { min-height: 70px; gap: 14px; }
  .site-nav { gap: 18px; }
  .nav-pricing { display: none; }
  .blog-intro { padding: 52px 0 40px; }
  .lead { font-size: 17px; }
  .desktop-break { display: none; }
  .post-link { grid-template-columns: 1fr; }
  .post-art { padding: 28px; }
  .bottom-note { flex-wrap: wrap; margin: 24px 0 48px; gap: 14px; }
  .bottom-note p { flex: 1; }
  .text-link { flex-basis: 100%; margin-left: 42px; }
  .article-header { padding: 32px 0; }
  .article-layout { grid-template-columns: 1fr; padding-top: 24px; gap: 28px; }
  .toc { position: static; padding-bottom: 24px; border-bottom: 1px solid var(--border); gap: 12px; }
  .prose { font-size: 16px; }
  .prose h2 { font-size: 25px; }
  .prose section { margin-top: 36px; }
  .article-cta { padding: 24px; }
  .footer-inner > span { order: 3; flex-basis: 100%; }
}
@media (max-width: 400px) {
  .container, .header-inner { padding-inline: 16px; }
  .brand { gap: 6px; font-size: 16px; }
  .site-nav { gap: 12px; font-size: 13px; }
  .button-small { padding: 8px 10px; gap: 6px; font-size: 12px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 4px; }
  .post-summary, .post-art { padding: 22px; }
  .mode-tile { padding: 15px 12px; gap: 12px; }
  .takeaway { padding: 20px; }
}