:root {
  --primary: #070b31;
  --body: #3f4857;
  --muted: #697386;
  --subtle: #858d9a;
  --surface: #fcfcfc;
  --divider: #e5e7eb;
  --hover: #e3e6e833;
  --hover-strong: #e3e6e840;
  --lime: #83f52c;
  --lime-soft: #f0ffdf;
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  color-scheme: light;
  scroll-behavior: smooth;
  background: linear-gradient(135deg, #e3e6e8, #f1f2f3 52%, #f1f0ee);
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: calc(100vh - 40px);
  margin: 20px;
  border-radius: 10px;
  background: var(--surface);
  color: var(--primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
h1, h2, h3, strong { font-weight: 600; }

.site-frame {
  width: 100%;
  max-width: 840px;
  min-height: calc(100vh - 40px);
  margin: 0 auto;
  padding: 40px 20px 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 50;
  padding: 8px 12px;
  border-radius: 6px;
  background: var(--primary);
  color: var(--surface);
  font-size: 12px;
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform .15s ease;
}

.skip-link:focus { transform: translateY(0); }

.lang-en { display: none !important; }
html[data-lang="en"] .lang-nl { display: none !important; }
html[data-lang="en"] .lang-en { display: revert !important; }

.desktop-nav,
.mobile-nav {
  position: fixed;
  z-index: 20;
  top: 50px;
  bottom: auto;
  border: 1px solid rgba(233, 238, 241, .8);
  background: rgba(252, 252, 252, .92);
  box-shadow: 0 0 20px rgba(149, 157, 165, .15);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
}

.desktop-nav {
  left: 50%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 80px), 800px);
  padding: 10px;
  border-radius: 10px;
  transform: translateX(-50%);
}

.nav-links,
.nav-meta,
.footer-meta,
.language-switch,
.mobile-meta,
.hero-links,
.contact-links {
  display: flex;
  align-items: center;
}

.nav-links { gap: 4px; }
.nav-meta { gap: 20px; margin-right: 12px; }

.nav-links a {
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--primary);
  font-size: 14px;
  line-height: 17px;
  letter-spacing: -.025em;
  text-decoration: none;
  transition: background .2s ease, color .2s ease;
}

.nav-links a:hover,
.nav-links a.active { background: var(--hover); }
.nav-links a.active { font-weight: 500; }

.nav-meta a,
.footer-meta a {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: -.025em;
  text-decoration: none;
  transition: color .2s ease;
}

.nav-meta a:hover,
.footer-meta a:hover { color: var(--primary); }

.language-switch {
  gap: 4px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: -.025em;
}

.language-switch button {
  padding: 3px 2px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 11px;
  letter-spacing: -.025em;
}

.language-switch button[aria-pressed="true"] { color: var(--primary); font-weight: 600; }

.mobile-nav { display: none; }

main {
  width: 100%;
  max-width: 800px;
  padding: 100px 0 120px;
}

.hero { width: 100%; }
.eyebrow { display: flex; align-items: center; gap: 8px; margin: 0 0 10px; color: var(--muted); font-size: 11px; line-height: 17px; letter-spacing: -.025em; }
.status-dot { width: 7px; height: 7px; flex: 0 0 auto; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 3px var(--lime-soft); }

.hero h1 { margin-bottom: 6px; font-size: 15px; line-height: 20px; letter-spacing: -.035em; }
.hero-role { color: var(--muted); font-size: 14px; line-height: 26px; letter-spacing: -.025em; }
.hero-copy { max-width: 600px; margin-top: 17px; color: var(--body); font-size: 14px; line-height: 26px; letter-spacing: -.025em; }
.hero-copy p { margin-bottom: 0; }

.hero-links { flex-wrap: wrap; gap: 10px; margin-top: 21px; }
.hero-separator { color: var(--divider); }

.text-link {
  width: fit-content;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -.025em;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color .2s ease;
}

.text-link:hover { color: var(--muted); }

.section { max-width: 560px; margin-top: 95px; scroll-margin-top: 28px; }
.section h2 { margin-bottom: 10px; font-size: 14px; line-height: 20px; letter-spacing: -.025em; }
.section-content { display: flex; flex-direction: column; gap: 10px; padding: 20px 10px; }
.section-intro, .section-content > p { margin: 0; color: var(--body); font-size: 14px; line-height: 26px; letter-spacing: -.025em; }
.section-content h3 { margin: 0; font-size: 15px; line-height: 23px; letter-spacing: -.035em; }

.work-list { display: flex; max-width: 580px; flex-direction: column; gap: 1px; }
.work-item { display: block; padding: 20px 10px; border-radius: 6px; text-decoration: none; transition: background .2s ease; }
.work-item:hover { background: var(--hover); }
.work-meta { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 7px; color: var(--muted); font-size: 11px; line-height: 17px; letter-spacing: -.025em; }
.work-meta span:first-child { color: var(--primary); font-family: var(--font-sans); font-size: 10px; }
.work-item h3 { margin-bottom: 6px; font-size: 14px; line-height: 26px; letter-spacing: -.025em; }
.work-item p { max-width: 570px; margin-bottom: 8px; color: var(--body); font-size: 13px; line-height: 18px; letter-spacing: -.02em; }
.work-tags { color: var(--muted); font-family: var(--font-sans); font-size: 10px; line-height: 18px; letter-spacing: -.02em; }
.section-note { display: flex; align-items: center; gap: 9px; padding: 20px 10px 0; color: var(--muted); font-size: 12px; line-height: 20px; letter-spacing: -.025em; }
.section-note .status-dot { width: 5px; height: 5px; box-shadow: none; }

.topic-list { display: grid; gap: 1px; }
.topic-item { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding: 20px 10px; border-radius: 6px; transition: background .2s ease; }
.topic-item:hover { background: var(--hover); }
.topic-item h3 { margin-bottom: 4px; font-size: 14px; line-height: 20px; letter-spacing: -.025em; }
.topic-item p { max-width: 500px; margin: 0; color: var(--body); font-size: 13px; line-height: 18px; letter-spacing: -.02em; }
.topic-index { padding-top: 2px; color: var(--muted); font-family: var(--font-sans); font-size: 10px; }

.method-list { display: grid; gap: 1px; }
.method-list article { display: grid; grid-template-columns: 30px 1fr; gap: 8px; padding: 18px 10px; border-radius: 6px; transition: background .2s ease; }
.method-list article:hover { background: var(--hover); }
.method-list article > span { color: var(--muted); font-family: var(--font-sans); font-size: 10px; line-height: 22px; }
.method-list h3 { margin-bottom: 3px; font-size: 14px; line-height: 22px; letter-spacing: -.025em; }
.method-list p { margin: 0; color: var(--body); font-size: 13px; line-height: 18px; letter-spacing: -.02em; }

.about-copy { padding-top: 19px; }
.about-copy > p { margin: 0; color: var(--body); font-size: 14px; line-height: 26px; letter-spacing: -.025em; }
.about-proof { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; align-items: start; margin-top: 18px; padding: 18px 0 0; border-top: 1px solid var(--divider); }
.about-proof strong { grid-row: span 2; color: var(--primary); font-size: 22px; line-height: 26px; letter-spacing: -.06em; }
.about-proof p { margin: 0; color: var(--body); font-size: 13px; line-height: 18px; letter-spacing: -.02em; }
.about-proof .text-link { grid-column: 2; margin-top: 4px; font-size: 13px; }

.faq-list { display: grid; gap: 1px; }
.faq-list details { padding: 0 10px; border-radius: 6px; transition: background .2s ease; }
.faq-list details:hover { background: var(--hover); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 15px; padding: 18px 0; cursor: pointer; list-style: none; font-size: 14px; line-height: 20px; letter-spacing: -.025em; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-plus { color: var(--muted); font-size: 16px; font-weight: 400; transition: transform .2s ease; }
.faq-list details[open] .faq-plus { transform: rotate(45deg); }
.faq-list details > p { max-width: 500px; margin: -2px 30px 18px 0; color: var(--body); font-size: 13px; line-height: 18px; letter-spacing: -.02em; }

.blog-positioning { margin: 0; color: var(--muted); font-size: 13px; line-height: 18px; letter-spacing: -.02em; }
.blog-list { display: grid; max-width: 580px; gap: 1px; }
.blog-item { display: grid; grid-template-columns: 150px 1fr; gap: 18px; padding: 20px 10px; border-radius: 6px; color: inherit; text-decoration: none; transition: background .2s ease; }
.blog-item:hover { background: var(--hover); }
.blog-item:focus-visible { outline: 2px solid var(--primary); outline-offset: 4px; }
.blog-meta { display: flex; flex-direction: column; gap: 5px; color: var(--muted); font-family: var(--font-sans); font-size: 10px; line-height: 17px; letter-spacing: -.02em; }
.blog-meta span:first-child { color: var(--primary); }
.blog-copy h3 { margin-bottom: 6px; font-size: 14px; line-height: 22px; letter-spacing: -.025em; }
.blog-copy p { max-width: 440px; margin: 0; color: var(--body); font-size: 13px; line-height: 18px; letter-spacing: -.02em; }
.blog-read { display: inline-block; margin-top: 10px; font-size: 12px; }
.blog-note { display: flex; align-items: center; gap: 9px; padding: 20px 10px 0; color: var(--muted); font-size: 12px; line-height: 20px; letter-spacing: -.025em; }
.blog-note .status-dot { width: 5px; height: 5px; box-shadow: none; }

.article-main { max-width: 640px; }
.article-header { max-width: 600px; }
.article-back { display: inline-block; margin-bottom: 28px; color: var(--muted); font-size: 13px; letter-spacing: -.02em; text-decoration: none; }
.article-back:hover { color: var(--primary); }
.article-kicker { margin-bottom: 12px; color: var(--muted); font-size: 11px; line-height: 17px; letter-spacing: -.025em; }
.article-header h1 { max-width: 600px; margin: 0 0 14px; font-size: clamp(30px, 5vw, 44px); line-height: 1.08; letter-spacing: -.055em; }
.article-dek { max-width: 580px; margin: 0; color: var(--body); font-size: 17px; line-height: 28px; letter-spacing: -.025em; }
.article-meta { margin: 18px 0 0; color: var(--muted); font-size: 12px; line-height: 18px; letter-spacing: -.02em; }
.article-body { max-width: 580px; margin-top: 54px; }
.article-body h2 { margin: 36px 0 10px; font-size: 20px; line-height: 28px; letter-spacing: -.04em; }
.article-body h2:first-child { margin-top: 0; }
.article-body p, .article-body li { color: var(--body); font-size: 15px; line-height: 27px; letter-spacing: -.02em; }
.article-body p { margin: 0 0 18px; }
.article-body ul { margin: 0 0 24px; padding-left: 22px; }
.article-body li + li { margin-top: 7px; }
.article-body pre { overflow-x: auto; margin: 24px 0 28px; padding: 18px 20px; border: 1px solid var(--divider); border-radius: 8px; background: #f5f6f4; color: var(--primary); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; line-height: 21px; }
.article-body code { font-family: inherit; }
.article-callout { margin: 30px 0; padding: 17px 20px; border-left: 2px solid var(--lime); background: var(--lime-soft); color: var(--body); font-size: 14px; line-height: 23px; letter-spacing: -.02em; }
.article-figure { margin: 34px 0 42px; }
.article-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--divider); border-radius: 8px; }
.article-figure figcaption { margin-top: 10px; color: var(--muted); font-size: 11px; line-height: 18px; }
.article-sources { margin-top: 42px; padding-top: 22px; border-top: 1px solid var(--divider); }
.article-sources h2 { margin-top: 0; }
.article-sources ul { margin-bottom: 0; }
.article-sources a { color: var(--primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.blog-hub-main { max-width: 680px; }
.blog-hub-header { max-width: 620px; }
.blog-hub-header h1 { max-width: 620px; margin: 0 0 14px; font-size: clamp(30px, 5vw, 44px); line-height: 1.08; letter-spacing: -.055em; }
.blog-hub-header p { max-width: 580px; margin: 0; color: var(--body); font-size: 17px; line-height: 28px; letter-spacing: -.025em; }
.blog-hub-list { max-width: 640px; margin-top: 54px; }
.blog-hub-list > h2 { margin: 0 0 10px; font-size: 14px; line-height: 20px; letter-spacing: -.025em; }
.blog-hub-list .blog-item { grid-template-columns: 170px 1fr; }
.article-footer { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 58px; padding-top: 22px; border-top: 1px solid var(--divider); }
.article-footer .text-link { font-size: 13px; }

.contact-section { padding-bottom: 20px; }
.contact-links { flex-wrap: wrap; gap: 16px; margin-top: 5px; }
.contact-links .text-link { font-size: 13px; }

.site-footer { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; padding: 28px 10px 110px; border-top: 1px solid var(--divider); }
.footer-brand { font-size: 14px; font-weight: 600; letter-spacing: -.035em; text-decoration: none; }
.site-footer p { margin: 6px 0 0; color: var(--muted); font-size: 11px; line-height: 17px; letter-spacing: -.025em; }
.footer-meta { gap: 18px; }
.footer-meta .language-switch { margin-left: 2px; }

@media (max-width: 880px) {
  .site-frame { max-width: calc(100% - 40px); margin: 0 auto; }
  .desktop-nav { width: calc(100% - 80px); }
}

@media (max-width: 640px) {
  .desktop-nav { display: none; }
  .mobile-nav { display: none; }
  .mobile-nav details { position: relative; }
  .mobile-nav details > div { position: absolute; top: calc(100% + 8px); right: 0; left: 0; padding: 10px; border: 1px solid rgba(233, 238, 241, .8); border-radius: 10px; background: rgba(252, 252, 252, .95); box-shadow: 0 0 20px rgba(149, 157, 165, .18); -webkit-backdrop-filter: blur(24px); backdrop-filter: blur(24px); }
  .mobile-nav summary { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; cursor: pointer; list-style: none; font-size: 14px; font-weight: 500; line-height: 17px; letter-spacing: -.025em; }
  .mobile-nav summary::-webkit-details-marker { display: none; }
  .summary-muted { color: var(--muted); font-weight: 400; }
  .mobile-menu { display: grid; gap: 4px; }
  .mobile-menu > a { padding: 8px 12px; border-radius: 6px; font-size: 14px; line-height: 17px; text-decoration: none; }
  .mobile-menu > a:hover { background: var(--hover-strong); }
  .mobile-meta { gap: 16px; margin-top: 8px; padding: 12px; border-top: 1px solid var(--divider); }
  .mobile-meta > a { color: var(--muted); font-size: 12px; text-decoration: none; }
  .mobile-meta .language-switch { margin-left: auto; }
  main { padding-top: 45px; padding-bottom: 125px; }
  .hero, main, .section, .section-content, .work-list, .topic-list, .method-list, .faq-list { width: 100%; max-width: 100%; min-width: 0; }
  .section { margin-top: 80px; }
  .work-meta span:not(:first-child), .work-item p, .topic-item p, .method-list p, .faq-list details > p { min-width: 0; overflow-wrap: anywhere; }
  .topic-item > div, .method-list article > div { min-width: 0; }
}

@media (max-width: 500px) {
  body { margin: 20px; }
  .site-frame { max-width: 100%; padding: 24px 20px 0; }
  .hero-copy { max-width: 100%; }
  .hero-links { align-items: flex-start; flex-direction: column; gap: 8px; }
  .hero-separator { display: none; }
  .work-item, .topic-item, .method-list article, .faq-list details, .blog-item { padding-right: 0; padding-left: 0; }
  .section-content { padding-right: 0; padding-left: 0; }
  .section-note, .blog-note { padding-right: 0; padding-left: 0; }
  .blog-item { grid-template-columns: 1fr; gap: 8px; }
  .article-main { padding-top: 45px; }
  .article-header h1 { font-size: 32px; }
  .article-dek { font-size: 16px; line-height: 26px; }
  .article-body { margin-top: 42px; }
  .article-body p, .article-body li { font-size: 14px; line-height: 25px; }
  .site-footer { align-items: flex-start; flex-direction: column; padding-right: 0; padding-left: 0; }
  .footer-meta { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}