/* Van Ede Glas Kenniscentrum — shared stylesheet
   Gebruikt door alle artikelen vanaf batch 2 (juli 2026).
   Design system matched met vanedeglas.nl homepage. */

:root{
  --navy:#0E2236;--navy-2:#1a2d3e;--navy-3:#0c1824;
  --glas:#5B7C99;--line:#e6e6e0;--paper:#fafaf7;
  --stone:#8b8b85;--stone-2:#4a4a44;--gold:#c9a961;
  --ease:cubic-bezier(.16,1,.3,1);--max:1400px
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-weight:400;font-size:17px;line-height:1.65;color:var(--stone-2);background:var(--paper);-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:'Playfair Display',Georgia,serif;font-weight:400;color:var(--navy);letter-spacing:-.01em;line-height:1.2}
h1{font-size:clamp(2.4rem,5vw,4rem);font-weight:500;line-height:1.1;margin-bottom:.6em}
h2{font-size:clamp(1.7rem,3vw,2.4rem);margin:2em 0 .8em;font-weight:500}
h3{font-size:clamp(1.3rem,2.2vw,1.6rem);margin:1.8em 0 .6em;font-weight:600}
p{margin-bottom:1.2em}
a{color:var(--navy);text-decoration:none;border-bottom:1px solid var(--glas);transition:color .2s,border-color .2s}
a:hover{color:var(--glas);border-color:var(--navy)}
strong{color:var(--navy);font-weight:600}
em{font-style:italic;color:var(--stone-2)}
ul,ol{margin:0 0 1.4em 1.6em;padding:0}
li{margin-bottom:.4em}

/* Topbar + nav */
.topbar{background:var(--navy);color:rgba(255,255,255,.92);font-size:12px;padding:8px 0;letter-spacing:.02em}
.topbar-in{max-width:var(--max);margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.topbar a{color:rgba(255,255,255,.92);border:none}
.topbar a:hover{color:#fff}
.nav{position:sticky;top:0;z-index:99;background:rgba(250,250,247,.94);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}
.nav-in{max-width:var(--max);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:center;gap:10px;border:none}
.brand-name{font-family:'Playfair Display',serif;font-size:22px;font-weight:600;color:var(--navy);letter-spacing:-.02em}
.brand-sub{font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--stone);margin-top:-2px}
.nav ul{flex:1;display:flex;gap:28px;list-style:none;justify-content:center;margin:0}
.nav ul a{font-size:13px;font-weight:500;color:var(--navy);letter-spacing:.02em;position:relative;padding:6px 0;border:none;transition:color .2s}
.nav ul a:hover,.nav ul a.active{color:var(--glas)}
.nav ul a:after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:1px;background:var(--glas);transition:width .3s var(--ease)}
.nav ul a:hover:after,.nav ul a.active:after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.btn-sec{padding:10px 18px;border:1.5px solid var(--navy);color:var(--navy);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;border-radius:2px;transition:all .25s;background:transparent;cursor:pointer;display:inline-flex;align-items:center;gap:8px}
.btn-sec:hover{background:var(--navy);color:#fff}
.btn-pri{padding:11px 20px;background:var(--navy);color:#fff;font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;border-radius:2px;transition:all .25s;display:inline-flex;align-items:center;gap:8px;border:none;cursor:pointer}
.btn-pri:hover{background:var(--navy-2)}

/* Article hero */
.article-hero{background:linear-gradient(180deg,var(--navy) 0%,var(--navy-2) 100%);color:#fff;padding:80px 0 100px;position:relative;overflow:hidden}
.article-hero:before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 20% 30%,rgba(91,124,153,.15),transparent 50%),radial-gradient(circle at 80% 70%,rgba(91,124,153,.1),transparent 50%)}
.hero-in{max-width:920px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.breadcrumbs{font-size:12px;text-transform:uppercase;letter-spacing:.14em;color:rgba(255,255,255,.65);margin-bottom:32px}
.breadcrumbs a{color:rgba(255,255,255,.85);border-color:rgba(255,255,255,.3)}
.breadcrumbs a:hover{color:#fff;border-color:#fff}
.breadcrumbs span{margin:0 10px;opacity:.5}
.article-hero h1{color:#fff;margin-bottom:24px}
.article-lede{font-size:1.2rem;line-height:1.55;color:rgba(255,255,255,.85);font-weight:300;max-width:720px;margin-bottom:32px}
.article-meta{display:flex;flex-wrap:wrap;gap:24px;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.65)}
.article-meta strong{color:#fff;font-weight:600}

/* Summary + body */
.summary{max-width:820px;margin:-40px auto 0;padding:36px 44px;background:#fff;border:1px solid var(--line);border-left:3px solid var(--glas);border-radius:2px;box-shadow:0 20px 60px rgba(14,34,54,.08);position:relative;z-index:2}
.summary-label{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--glas);font-weight:600;margin-bottom:12px}
.summary p{margin-bottom:0;font-size:1.05rem;line-height:1.65;color:var(--stone-2)}
.summary p strong{color:var(--navy)}
.article-body{max-width:820px;margin:60px auto;padding:0 24px}
.article-body h2{padding-top:20px;border-top:1px solid var(--line)}
.article-body h2:first-of-type{border-top:none;padding-top:0}
.article-body table{width:100%;border-collapse:collapse;margin:2em 0;font-size:.95rem}
.article-body th{background:var(--navy);color:#fff;padding:14px 16px;text-align:left;font-weight:600;font-size:13px;letter-spacing:.04em;text-transform:uppercase}
.article-body td{padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.article-body tr:nth-child(even) td{background:rgba(91,124,153,.04)}
.article-body blockquote{margin:2em 0;padding:24px 32px;border-left:3px solid var(--glas);background:rgba(91,124,153,.06);font-style:italic;color:var(--navy)}

/* Callout, FAQ, related */
.callout{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 100%);color:#fff;padding:32px 36px;margin:2em 0;border-radius:2px}
.callout h3{color:#fff;margin-top:0;font-family:'Inter',sans-serif;font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin-bottom:12px}
.callout p{color:rgba(255,255,255,.9);margin-bottom:0}
.callout strong{color:#fff}
.callout-price{font-family:'Playfair Display',serif;font-size:2.6rem;font-weight:500;line-height:1;margin:8px 0}
.faq{margin-top:60px}
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{font-family:'Playfair Display',serif;font-size:1.15rem;font-weight:500;color:var(--navy);cursor:pointer;list-style:none;position:relative;padding-right:40px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:'+';position:absolute;right:0;top:50%;transform:translateY(-50%);font-size:1.6rem;color:var(--glas);font-family:'Inter',sans-serif;font-weight:300;line-height:1;transition:transform .3s}
.faq details[open] summary:after{content:'−'}
.faq details[open] summary{color:var(--glas)}
.faq details>*:not(summary){margin-top:16px;font-size:.98rem}
.related{background:var(--navy);color:#fff;padding:80px 0;margin-top:80px}
.related-in{max-width:var(--max);margin:0 auto;padding:0 24px}
.related h2{color:#fff;text-align:center;margin-bottom:12px}
.related-sub{text-align:center;color:rgba(255,255,255,.7);font-size:.95rem;letter-spacing:.04em;margin-bottom:48px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.related-card{background:var(--navy-2);border:1px solid rgba(255,255,255,.08);padding:28px;border-radius:2px;transition:all .3s;display:block}
.related-card:hover{background:var(--navy-3);border-color:var(--glas);transform:translateY(-2px)}
.related-card-label{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--glas);margin-bottom:10px;font-weight:600}
.related-card h3{color:#fff;font-size:1.15rem;font-weight:500;margin:0 0 12px}
.related-card p{color:rgba(255,255,255,.7);font-size:.9rem;margin:0;line-height:1.5}

/* CTA + footer */
.cta-block{background:var(--paper);padding:80px 24px;text-align:center;border-top:1px solid var(--line)}
.cta-block h2{margin-bottom:16px}
.cta-block p{max-width:600px;margin:0 auto 32px;color:var(--stone-2)}
.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.footer{background:var(--navy-3);color:rgba(255,255,255,.75);padding:60px 24px 30px;font-size:.9rem}
.footer-in{max-width:var(--max);margin:0 auto}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:40px;margin-bottom:40px}
.footer h4{color:#fff;font-family:'Inter',sans-serif;font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin-bottom:16px}
.footer ul{list-style:none;margin:0;padding:0}
.footer li{margin-bottom:8px}
.footer a{color:rgba(255,255,255,.75);border:none}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.85rem;color:rgba(255,255,255,.5)}

/* Cluster-hub specific */
.hub-hero{background:linear-gradient(180deg,var(--navy) 0%,var(--navy-2) 100%);color:#fff;padding:80px 24px;text-align:center;position:relative;overflow:hidden}
.hub-hero:before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 20% 30%,rgba(91,124,153,.15),transparent 50%),radial-gradient(circle at 80% 70%,rgba(91,124,153,.1),transparent 50%)}
.hub-hero-in{max-width:920px;margin:0 auto;position:relative;z-index:1}
.hub-hero .breadcrumbs{margin-bottom:32px}
.hub-hero h1{color:#fff}
.hub-hero .hub-lede{font-size:1.2rem;color:rgba(255,255,255,.85);font-weight:300;max-width:720px;margin:16px auto 0}
.hub-articles{max-width:var(--max);margin:0 auto;padding:60px 24px 100px}
.hub-head{text-align:center;margin-bottom:48px}
.hub-head-label{font-size:12px;text-transform:uppercase;letter-spacing:.16em;color:var(--glas);font-weight:600;margin-bottom:12px}
.hub-head h2{margin-bottom:14px}
.hub-head p{color:var(--stone);max-width:640px;margin:0 auto}
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
.article-card{background:#fff;border:1px solid var(--line);padding:32px 28px;border-radius:2px;transition:all .3s var(--ease);position:relative;overflow:hidden;display:block}
.article-card:before{content:'';position:absolute;top:0;left:0;width:3px;height:100%;background:var(--glas);transform:scaleY(0);transform-origin:top;transition:transform .3s var(--ease)}
.article-card:hover{border-color:var(--glas);transform:translateY(-3px);box-shadow:0 24px 60px rgba(14,34,54,.08)}
.article-card:hover:before{transform:scaleY(1)}
.article-card-num{font-family:'Playfair Display',serif;font-size:.9rem;color:var(--glas);font-weight:600;letter-spacing:.02em;margin-bottom:12px}
.article-card h3{font-size:1.25rem;font-weight:500;margin:0 0 12px;line-height:1.3;color:var(--navy)}
.article-card p{font-size:.95rem;color:var(--stone-2);margin-bottom:16px;line-height:1.55}
.article-card-meta{display:flex;justify-content:space-between;align-items:center;font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--stone);padding-top:14px;border-top:1px solid var(--line)}
.article-card-meta strong{color:var(--navy)}

@media(max-width:900px){
  .nav ul{display:none}
  .article-body,.summary{padding-left:20px;padding-right:20px}
  .summary{padding:24px;margin-left:16px;margin-right:16px}
  .article-hero,.hub-hero{padding:60px 20px 80px}
  .article-card,.hub-articles{padding-left:16px;padding-right:16px}
}