/* Arvas Kennisbank — artikel-styling
   Deelt de kleurentaal met de hoofdsite (arvashosting.eu). */
:root{
  --ink:#0b1020; --panel:#121a30; --panel2:#182342; --line:#26335c;
  --text:#e8ecf6; --muted:#93a0c2; --accent:#e8b64c; --accent-dark:#c2933a;
  --green:#4cc98a;
}
*{margin:0;padding:0;box-sizing:border-box}
::selection{background:var(--accent);color:var(--ink)}
html{scroll-behavior:smooth}
body{background:var(--ink);color:var(--text);font-family:'IBM Plex Sans',sans-serif;line-height:1.7;overflow-x:hidden}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 24px}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.03;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E")}
main,header,footer{position:relative;z-index:2}

/* header */
.art-header{border-bottom:1px solid var(--line);background:rgba(11,16,32,.85);backdrop-filter:blur(18px);position:sticky;top:0;z-index:40}
.art-header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-weight:700;font-size:1.2rem;letter-spacing:.02em;display:flex;align-items:center;gap:10px;color:var(--text)}
.logo:hover{text-decoration:none}
.logo .mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent-dark));
  display:flex;align-items:center;justify-content:center;color:var(--ink);font-weight:700;font-size:.95rem}
.logo span{color:var(--accent)}
.back{color:var(--muted);font-size:.9rem;padding:8px 14px;border:1px solid var(--line);border-radius:999px;transition:all .2s}
.back:hover{border-color:var(--accent);color:var(--text);text-decoration:none}

/* article body */
.art{padding:60px 0 100px}
.breadcrumb{font-family:'IBM Plex Mono',monospace;font-size:.75rem;color:var(--muted);margin-bottom:32px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb span{margin:0 6px;opacity:.5}
.art-cat{font-family:'IBM Plex Mono',monospace;font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent);display:inline-block;padding:5px 12px;border:1px solid var(--accent);border-radius:999px;margin-bottom:22px}
.art h1{font-size:clamp(1.8rem,4vw,2.6rem);line-height:1.2;font-weight:700;letter-spacing:-.01em;margin-bottom:18px}
.art-meta{font-family:'IBM Plex Mono',monospace;font-size:.78rem;color:var(--muted);margin-bottom:38px;letter-spacing:.04em}
.art-meta span:not(:last-child){margin-right:4px}
.art .lead{font-size:1.14rem;color:var(--text);opacity:.95;margin-bottom:44px;padding-bottom:32px;border-bottom:1px solid var(--line)}
.art h2{font-size:1.42rem;font-weight:700;margin:44px 0 18px;color:var(--text);letter-spacing:-.005em}
.art h2::before{content:"§ ";color:var(--accent);font-family:'IBM Plex Mono',monospace;font-weight:500}
.art h3{font-size:1.05rem;font-weight:600;margin:22px 0 12px;color:var(--text)}
.art p{margin-bottom:16px;color:#c8d0e6}
.art ul,.art ol{margin:0 0 20px 24px;padding:0}
.art li{margin-bottom:10px;color:#c8d0e6}
.art li strong{color:var(--text)}
.art pre{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 18px;
  font-family:'IBM Plex Mono',monospace;font-size:.85rem;color:var(--accent);overflow-x:auto;margin:14px 0}
.art em{color:var(--accent);font-style:normal;font-weight:500}

.callout{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:12px;padding:24px 28px;margin:36px 0}
.callout h3{margin-top:0;color:var(--accent);font-size:.92rem;letter-spacing:.06em;text-transform:uppercase;
  font-family:'IBM Plex Mono',monospace}
.callout ul{margin:12px 0 0 20px}
.callout pre{margin-top:12px;margin-bottom:4px}

/* Take-away box */
.takeaway{background:linear-gradient(180deg,rgba(232,182,76,.08),rgba(232,182,76,.02));
  border:1px solid rgba(232,182,76,.35);border-radius:12px;padding:22px 26px;margin:32px 0;
  display:flex;gap:16px;align-items:flex-start}
.takeaway .icon{flex:0 0 40px;height:40px;border-radius:10px;background:var(--accent);color:var(--ink);
  display:flex;align-items:center;justify-content:center;font-family:'IBM Plex Mono',monospace;
  font-weight:700;font-size:1.1rem}
.takeaway .body{flex:1}
.takeaway h4{margin:0 0 6px;color:var(--accent);font-size:.78rem;letter-spacing:.14em;
  text-transform:uppercase;font-family:'IBM Plex Mono',monospace}
.takeaway p{margin:0;color:var(--text)}

/* Comparison table */
.art table{width:100%;border-collapse:collapse;margin:20px 0 24px;font-size:.9rem;
  background:var(--panel);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.art th{background:var(--panel2);color:var(--accent);text-align:left;padding:12px 14px;
  font-family:'IBM Plex Mono',monospace;font-size:.72rem;letter-spacing:.08em;
  text-transform:uppercase;border-bottom:1px solid var(--line);font-weight:600}
.art td{padding:12px 14px;border-bottom:1px solid var(--line);color:#c8d0e6;vertical-align:top}
.art tr:last-child td{border-bottom:none}
.art td strong{color:var(--text)}

/* FAQ */
.faq{margin:24px 0}
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:10px;
  margin-bottom:10px;padding:0;overflow:hidden;transition:border-color .18s}
.faq details[open]{border-color:var(--accent)}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:600;color:var(--text);
  list-style:none;position:relative;padding-right:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  color:var(--accent);font-size:1.3rem;font-weight:400;transition:transform .2s}
.faq details[open] summary::after{content:"−"}
.faq details > p, .faq details > ul{padding:0 20px 18px;margin:0}
.faq details > ul{margin-left:36px}

/* Related links */
.related{margin-top:44px;padding:24px;background:var(--panel);border:1px solid var(--line);
  border-radius:12px}
.related h3{color:var(--muted);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  font-family:'IBM Plex Mono',monospace;margin-bottom:14px;font-weight:500}
.related ul{list-style:none;margin:0;padding:0}
.related li{margin-bottom:8px}
.related li::before{content:"→ ";color:var(--accent);font-family:'IBM Plex Mono',monospace}
.related a{color:var(--text)}
.related a:hover{color:var(--accent);text-decoration:none}

.art-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:48px;padding-top:36px;border-top:1px solid var(--line)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:999px;
  font-weight:600;font-size:.9rem;cursor:pointer;border:none;font-family:inherit;transition:all .18s}
.btn:hover{transform:translateY(-2px);text-decoration:none}
.btn-accent{background:var(--accent);color:var(--ink);box-shadow:0 4px 22px rgba(232,182,76,.22)}
.btn-accent:hover{background:var(--accent-dark);box-shadow:0 8px 30px rgba(232,182,76,.32)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--accent)}

/* footer */
.art-footer{border-top:1px solid var(--line);padding:32px 0;background:rgba(11,16,32,.7)}
.art-footer p{color:var(--muted);font-size:.85rem;text-align:center}
.art-footer a{color:var(--accent)}

@media(max-width:600px){
  .art{padding:36px 0 70px}
  .art h1{font-size:1.6rem}
  .art h2{font-size:1.2rem}
  .art .lead{font-size:1rem}
  .callout{padding:18px 20px}
}