:root {
  --paper: #f2f0ea;
  --surface: #fbfaf6;
  --ink: #1d211f;
  --muted: #68706b;
  --line: #d7d8d0;
  --accent: #bd6046;
  --accent-deep: #8e3f2f;
  --soft-accent: #ead7ce;
  --display: #fffdf8;
  --measure: min(1180px, calc(100% - 4rem));
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
  --shadow: 0 1rem 3rem rgba(28, 33, 30, .08);
  color-scheme: light;
}

html[data-theme="dark"], html.dark {
  --paper: #1c211f;
  --surface: #242a27;
  --ink: #f2f0e9;
  --muted: #a8b0a8;
  --line: #3b443f;
  --accent: #db765c;
  --accent-deep: #f0a18a;
  --soft-accent: #4a3028;
  --display: #242a27;
  --shadow: 0 1rem 3rem rgba(0, 0, 0, .22);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1rem/1.6 var(--font-body); overflow-x: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea { font: inherit; }
button { color: inherit; }
::selection { background: var(--accent); color: #fff; }

.site-header { width: var(--measure); margin: 0 auto; padding: 1.25rem 0; display: flex; align-items: center; justify-content: space-between; gap: 2rem; position: relative; z-index: 5; }
.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; font: 700 1.45rem/1 var(--font-display); letter-spacing: -.07em; }
.brand-mark { display: grid; place-items: center; width: 2.55rem; height: 2.55rem; border: 1px solid currentColor; border-radius: 50%; font: 600 1.1rem/1 var(--font-display); letter-spacing: -.12em; position: relative; }
.brand-mark::after { content: ''; width: .42rem; height: .42rem; background: var(--accent); border-radius: 50%; position: absolute; right: -.16rem; top: .18rem; }
.brand small { display: block; margin-left: .18rem; font: 500 .58rem/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.main-nav { display: flex; align-items: center; gap: 1.55rem; }
.main-nav a { padding: .3rem 0; color: var(--muted); font: 500 .77rem/1 var(--font-mono); letter-spacing: .04em; text-decoration: none; text-transform: uppercase; border-bottom: 1px solid transparent; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--ink); border-color: var(--accent); }
.header-tools { display: flex; align-items: center; gap: .65rem; }
.theme-toggle, .menu-toggle { display: grid; place-items: center; width: 2.45rem; height: 2.45rem; border: 1px solid var(--line); background: transparent; cursor: pointer; }
.theme-toggle { border-radius: 50%; font-size: 1rem; }
.menu-toggle { display: none; border-radius: 0; }
.menu-toggle span, .menu-toggle::before, .menu-toggle::after { content: ''; display: block; width: 1rem; height: 1px; background: currentColor; }
.menu-toggle::before { transform: translateY(-.27rem); }
.menu-toggle::after { transform: translateY(.27rem); }

.rail-layout { width: var(--measure); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) 11rem; gap: 2.5rem; align-items: start; }
.rail-layout:has([data-side-links][hidden]), .rail-layout:not(:has([data-side-links])) { grid-template-columns: minmax(0, 1fr); }
[data-side-links][hidden] { display: none; }
.side-links { order: 2; border-top: 2px solid var(--ink); padding-top: .75rem; margin-top: 1.75rem; }
.side-links h2 { margin: 0 0 1rem; color: var(--muted); font: 500 .62rem/1.3 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.side-links ol { display: grid; gap: .7rem; padding: 0; margin: 0; list-style: none; }
.side-links a { color: var(--muted); text-decoration: none; font-size: .82rem; }
.side-links a:hover { color: var(--accent); }

main { min-width: 0; }
.section { width: var(--measure); margin: 0 auto; padding: 6rem 0; }
.section-tight { padding: 3.5rem 0; }
.eyebrow { display: flex; align-items: center; gap: .7rem; margin: 0 0 1.2rem; color: var(--accent); font: 500 .65rem/1 var(--font-mono); letter-spacing: .12em; text-transform: uppercase; }
.eyebrow::before { content: ''; width: 2.2rem; border-top: 1px solid currentColor; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -.055em; font-weight: 600; }
h1 { max-width: 10ch; margin-bottom: 1.5rem; font-size: clamp(3.4rem, 8vw, 7.8rem); line-height: .9; }
h2 { margin-bottom: 1.2rem; font-size: clamp(2rem, 4vw, 4rem); line-height: .98; }
h3 { margin-bottom: .55rem; font-size: 1.35rem; line-height: 1.08; }
.lead { max-width: 34rem; color: var(--muted); font-size: 1.12rem; line-height: 1.6; }
.mono { color: var(--muted); font: 500 .7rem/1.4 var(--font-mono); letter-spacing: .05em; text-transform: uppercase; }

.hero { width: var(--measure); margin: 0 auto; padding: 6rem 0 4rem; display: grid; grid-template-columns: minmax(0, .85fr) minmax(20rem, 1.15fr); gap: 4rem; align-items: end; }
.hero-copy { padding-bottom: 2rem; }
.hero h1 span { color: var(--accent); }
.hero-frame { min-height: 36rem; position: relative; background: #303532; overflow: hidden; }
.hero-frame img { width: 100%; height: 100%; min-height: 36rem; object-fit: cover; object-position: 58% center; filter: saturate(.78); }
.hero-frame::after { content: 'O—01 / materiaalstudie'; position: absolute; bottom: 1rem; left: 1rem; color: #fff; font: 500 .62rem/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.hero-frame::before { content: ''; position: absolute; inset: 0; z-index: 1; background: linear-gradient(130deg, rgba(10, 16, 13, .02), rgba(10, 16, 13, .38)); pointer-events: none; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .7rem; min-height: 3.1rem; padding: .75rem 1.1rem; background: var(--ink); color: var(--paper); border: 1px solid var(--ink); text-decoration: none; font: 600 .7rem/1 var(--font-mono); letter-spacing: .05em; text-transform: uppercase; }
.button::after { content: '↗'; font-size: 1rem; }
.button:hover { background: var(--accent); border-color: var(--accent); }
.button-quiet { background: transparent; color: var(--ink); border-color: var(--line); }
.button-quiet:hover { color: #fff; border-color: var(--accent); }

.intro { display: grid; grid-template-columns: .75fr 1fr; gap: 5rem; border-top: 1px solid var(--line); }
.intro-copy { max-width: 38rem; }
.intro-copy p { color: var(--muted); font-size: 1.17rem; }
.stat-line { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; padding-top: .3rem; border-top: 1px solid var(--line); }
.stat strong { display: block; margin-bottom: .25rem; font: 600 2.4rem/1 var(--font-display); letter-spacing: -.07em; }
.stat span { color: var(--muted); font-size: .78rem; }

.project-heading { display: flex; justify-content: space-between; align-items: end; gap: 2rem; }
.project-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1.2rem; margin-top: 2.5rem; }
.project-card { grid-column: span 5; text-decoration: none; }
.project-card:nth-child(2) { grid-column: span 7; margin-top: 5rem; }
.project-card:nth-child(3) { grid-column: 2 / span 5; }
.project-image { aspect-ratio: 1.18; overflow: hidden; background: #d1d1c9; }
.project-card:nth-child(2) .project-image { aspect-ratio: 1.45; }
.project-card:nth-child(3) .project-image { aspect-ratio: 1.16; }
.project-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.project-card:hover .project-image img { transform: scale(1.035); }
.project-meta { display: flex; justify-content: space-between; gap: 1rem; margin-top: .7rem; color: var(--muted); font: 500 .66rem/1.3 var(--font-mono); letter-spacing: .04em; text-transform: uppercase; }
.project-name { margin: .35rem 0 0; font: 600 1.25rem/1.1 var(--font-display); letter-spacing: -.04em; }
.project-blurb { margin: .45rem 0 0; color: var(--muted); font-size: .92rem; line-height: 1.45; }

.tone-band { background: var(--ink); color: var(--paper); }
.tone-band .eyebrow { color: var(--accent-deep); }
.service-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 5rem; }
.service-list { border-top: 1px solid color-mix(in srgb, var(--paper) 25%, transparent); }
.service-item { display: grid; grid-template-columns: 3rem 1fr 1.5rem; gap: 1rem; align-items: start; padding: 1.25rem 0; border-bottom: 1px solid color-mix(in srgb, var(--paper) 25%, transparent); }
.service-index { color: var(--accent-deep); font: 500 .65rem/1.4 var(--font-mono); }
.service-item h3 { margin: 0; font-size: 1.5rem; }
.service-item p { grid-column: 2 / -1; margin: .2rem 0 0; color: color-mix(in srgb, var(--paper) 65%, transparent); font-size: .93rem; }
.service-arrow { color: var(--accent-deep); font-size: 1.2rem; }

.process-intro { display: flex; justify-content: space-between; align-items: end; gap: 3rem; }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-top: 3rem; }
.process-step { min-height: 14rem; padding: 1rem; border-top: 2px solid var(--ink); background: var(--surface); }
.process-step .mono { display: block; margin-bottom: 2.7rem; color: var(--accent); }
.process-step p { color: var(--muted); font-size: .9rem; }

.quote-band { background: var(--soft-accent); }
.quote-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 5rem; align-items: center; }
.quote { margin: 0; max-width: 43rem; font: 500 clamp(1.7rem, 3.6vw, 3.2rem)/1.08 var(--font-display); letter-spacing: -.06em; }
.quote cite { display: block; margin-top: 1.4rem; color: var(--muted); font: 500 .68rem/1.4 var(--font-mono); letter-spacing: .06em; font-style: normal; text-transform: uppercase; }

.cta { padding: 5rem 0; background: var(--accent); color: #fffaf5; }
.cta-inner { width: var(--measure); margin: 0 auto; display: flex; justify-content: space-between; align-items: end; gap: 3rem; }
.cta h2 { max-width: 11ch; margin: 0; }
.cta .button { background: #fffaf5; border-color: #fffaf5; color: var(--ink); white-space: nowrap; }
.cta .button:hover { background: var(--ink); border-color: var(--ink); color: #fff; }

.site-footer { width: var(--measure); margin: 0 auto; padding: 3rem 0 1.7rem; }
.footer-top { display: flex; justify-content: space-between; gap: 2rem; padding-bottom: 3.5rem; }
.footer-contact { display: grid; gap: .35rem; text-align: right; }
.footer-contact a { color: var(--muted); text-decoration: none; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font: 500 .62rem/1.4 var(--font-mono); text-transform: uppercase; }

.page-header { width: var(--measure); margin: 0 auto; padding: 6rem 0 3rem; border-bottom: 1px solid var(--line); }
.page-header h1 { max-width: 12ch; }
.page-header .lead { max-width: 40rem; }
.work-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1.25rem 0; border-bottom: 1px solid var(--line); }
.filter-list { display: flex; flex-wrap: wrap; gap: .5rem; }
.filter-button { padding: .55rem .8rem; border: 1px solid var(--line); background: transparent; color: var(--muted); cursor: pointer; font: 500 .65rem/1 var(--font-mono); text-transform: uppercase; }
.filter-button:hover, .filter-button.is-active { border-color: var(--accent); background: var(--accent); color: #fff; }
.work-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); gap: 2.8rem 1.2rem; padding-top: 2rem; }
.work-card { text-decoration: none; }
.work-card[hidden] { display: none; }
.work-card .project-image { aspect-ratio: 1.18; }

.detail-hero { display: grid; grid-template-columns: .65fr 1.35fr; gap: 4rem; align-items: end; }
.detail-hero h1 { margin-bottom: 0; }
.detail-image { margin-top: 3rem; aspect-ratio: 2 / 1; overflow: hidden; background: #d2d1ca; }
.detail-image img { width: 100%; height: 100%; object-fit: cover; }
.detail-facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 2rem; }
.fact { padding-top: .7rem; border-top: 1px solid var(--line); }
.fact strong { display: block; margin-bottom: .3rem; font: 600 1.15rem/1.1 var(--font-display); }
.fact span { color: var(--muted); font-size: .8rem; }
.story-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 5rem; }
.story-grid h2 { font-size: clamp(2rem, 3.4vw, 3.3rem); }
.story-grid p { color: var(--muted); }
.material-note { padding: 1.5rem; border-left: 2px solid var(--accent); background: var(--surface); }

.service-page-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); margin-top: 3rem; border: 1px solid var(--line); }
.service-panel { min-height: 15rem; padding: 1.8rem; background: var(--paper); }
.service-panel .mono { color: var(--accent); }
.service-panel p { max-width: 31rem; color: var(--muted); }
.photo-strip { aspect-ratio: 2.6 / 1; overflow: hidden; margin-top: 4rem; background: #353c38; }
.photo-strip img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.8); }

.approach-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 3rem; }
.approach-card { min-height: 17rem; padding: 1.5rem; border: 1px solid var(--line); background: var(--surface); }
.approach-card .step-number { display: flex; justify-content: space-between; margin-bottom: 5rem; color: var(--accent); font: 500 .65rem/1 var(--font-mono); }
.approach-card p { color: var(--muted); font-size: .9rem; }
.faq-list { max-width: 48rem; border-top: 1px solid var(--line); }
details { padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font: 600 1.1rem/1.3 var(--font-display); list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; float: right; color: var(--accent); font-size: 1.5rem; font-weight: 400; }
details[open] summary::after { content: '–'; }
details p { max-width: 38rem; margin: .8rem 0 0; color: var(--muted); }

.contact-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 5rem; }
.contact-details { display: grid; align-content: start; gap: 1.4rem; }
.contact-details a { text-decoration: none; font-size: 1.1rem; }
.contact-details a:hover { color: var(--accent); }
.contact-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
.field { display: grid; gap: .4rem; }
.field-wide { grid-column: 1 / -1; }
.field label { color: var(--muted); font: 500 .65rem/1.2 var(--font-mono); letter-spacing: .04em; text-transform: uppercase; }
.field input, .field textarea { width: 100%; border: 0; border-bottom: 1px solid var(--line); padding: .65rem 0; outline: 0; background: transparent; color: var(--ink); }
.field textarea { min-height: 9rem; resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--accent); }
.form-note { grid-column: 1 / -1; color: var(--muted); font-size: .8rem; }
.form-status { grid-column: 1 / -1; min-height: 1.5rem; color: var(--accent); font-size: .85rem; }

.archive-form { display: flex; gap: 1rem; margin-top: 2rem; }
.archive-form input { width: min(100%, 25rem); border: 1px solid var(--line); padding: .8rem; background: var(--surface); color: var(--ink); }
.archive-results { display: grid; gap: 1rem; padding-top: 2rem; }
.empty-state { color: var(--muted); }
.news-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); gap: 1.5rem; }
.story-card { display: block; padding-bottom: 1.2rem; border-bottom: 1px solid var(--line); text-decoration: none; }
.story-image { display: block; aspect-ratio: 1.5; position: relative; overflow: hidden; background: #d1d1c9; }
.story-image img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.story-meta { display: flex; flex-wrap: wrap; gap: .5rem .75rem; margin-top: .75rem; color: var(--muted); font: 500 .65rem/1.3 var(--font-mono); text-transform: uppercase; }
.story-card h2 { margin: .4rem 0 .2rem; font-size: 1.45rem; }
.story-card p { color: var(--muted); font-size: .87rem; }
.byline { display: flex; align-items: center; gap: .8rem; max-width: 45rem; margin: 0 auto 2rem; padding: .9rem; background: var(--surface); }
.byline[hidden] { display: none; }
.byline img { width: 2.6rem; height: 2.6rem; border-radius: 50%; object-fit: cover; }
.byline strong { display: block; font: 600 .9rem/1.2 var(--font-display); }
.byline p { margin: .2rem 0 0; color: var(--muted); font-size: .78rem; }
.article-shell { max-width: 52rem; margin: 0 auto; }
.article-header { border-bottom: 1px solid var(--line); padding-bottom: 2rem; margin-bottom: 2rem; }
.article-header h1 { max-width: 15ch; }
.article-deck { color: var(--muted); font-size: 1.15rem; }
.article-cover { aspect-ratio: 1.8; overflow: hidden; margin-bottom: 2.5rem; }
.article-cover img { width: 100%; height: 100%; object-fit: cover; }
.prose { font-family: var(--font-body); font-size: 1.08rem; line-height: 1.75; }
.prose h2, .prose h3 { margin-top: 2.5rem; }
.prose a { color: var(--accent-deep); text-decoration-thickness: .08em; text-underline-offset: .18em; }

.not-found { min-height: 55vh; display: grid; place-items: center; text-align: center; }
.not-found h1 { max-width: none; }
.not-found p { max-width: 28rem; margin: 0 auto 2rem; color: var(--muted); }

@media (max-width: 850px) {
  :root { --measure: min(100% - 2.4rem, 680px); }
  .site-header { padding: 1rem 0; }
  .main-nav { display: none; position: absolute; left: 0; right: 0; top: 4.9rem; flex-direction: column; align-items: stretch; gap: 0; padding: .7rem 1rem; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: .8rem 0; border-bottom: 1px solid var(--line); }
  .main-nav a:last-child { border-bottom: 0; }
  .menu-toggle { display: grid; }
  .hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 4rem; }
  .hero-frame, .hero-frame img { min-height: 25rem; }
  .intro, .service-layout, .quote-layout, .contact-layout, .story-grid, .detail-hero { grid-template-columns: 1fr; gap: 2rem; }
  .intro { padding-top: 3.5rem; }
  .service-layout { gap: 2.5rem; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-inner, .footer-top { align-items: start; flex-direction: column; }
  .footer-contact { text-align: left; }
  .project-card, .project-card:nth-child(2), .project-card:nth-child(3) { grid-column: span 12; margin-top: 0; }
  .project-card:nth-child(2) .project-image { aspect-ratio: 1.18; }
  .service-page-grid { grid-template-columns: 1fr; }
  .approach-flow { grid-template-columns: 1fr; }
  .approach-card { min-height: auto; }
  .approach-card .step-number { margin-bottom: 3rem; }
  .rail-layout { grid-template-columns: minmax(0, 1fr); }
  .side-links { order: 2; }
  .rail-layout:has([data-side-links][hidden]) { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  :root { --measure: calc(100% - 2rem); }
  h1 { font-size: clamp(3rem, 16vw, 4.8rem); }
  .section { padding: 4.5rem 0; }
  .hero { padding: 3rem 0 2rem; }
  .stat-line { gap: .5rem; }
  .stat strong { font-size: 1.8rem; }
  .process-grid, .contact-form { grid-template-columns: 1fr; }
  .field-wide, .form-note, .form-status { grid-column: auto; }
  .work-toolbar { align-items: start; flex-direction: column; }
  .detail-facts { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; }
}

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