/* inburgeren.maken.io: shared look for every page (lesson pages add study.css).
   Colours come from the channel art: teal, warm paper, orange. System fonts only (nothing to download). */

:root {
  --paper: #f9f5ec;
  --card: #ffffff;
  --ink: #18213a;
  --muted: #5a6479;
  --faint: #6b7488;
  --rule: #e4ded2;
  --accent: #1d6f69;         /* links, buttons, the current part */
  --accent-soft: #e2f0ee;
  --accent-2: #b04d1b;       /* orange: KNM / exam badges, "coming soon" */
  --head-bg: rgba(249, 245, 236, .92);
  --font-nl: Charter, "Bitstream Charter", "Iowan Old Style", "Palatino Linotype", Palatino, "Noto Serif", Georgia, serif;
  --font-ui: "Avenir Next", Avenir, "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #10141f; --card: #181e2c; --ink: #e9edf5; --muted: #a2abbd; --faint: #8b95a8; --rule: #2a3243;
    --accent: #5cc8bd; --accent-soft: #15302e; --accent-2: #ffa36b; --head-bg: rgba(16, 20, 31, .92);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #10141f; --card: #181e2c; --ink: #e9edf5; --muted: #a2abbd; --faint: #8b95a8; --rule: #2a3243;
  --accent: #5cc8bd; --accent-soft: #15302e; --accent-2: #ffa36b; --head-bg: rgba(16, 20, 31, .92);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.5 var(--font-ui); }
button { font: inherit; color: inherit; }
[hidden] { display: none !important; }
a { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
img { max-width: 100%; }

/* two languages in the page: English first, Dutch when the visitor switches */
html:not([data-ui="nl"]) [data-l="nl"], html[data-ui="nl"] [data-l="en"] { display: none !important; }

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--card); color: var(--ink);
  padding: 10px 16px; border-radius: 10px; box-shadow: 0 4px 20px rgba(0, 0, 0, .2); font-weight: 700;
}
.skip:focus { top: 12px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--rule); background: var(--card); color: var(--ink);
  border-radius: 999px; padding: 10px 18px; min-height: 44px;
  font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
:root[data-theme="dark"] .btn.primary { color: #10141f; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.primary { color: #10141f; } }
.btn.ghost { background: transparent; }
.btn.small { min-height: 36px; padding: 6px 14px; font-size: 14px; }
.btn svg { width: 20px; height: 20px; fill: currentColor; flex: none; }

/* ---------- header ---------- */
.site-head {
  position: relative; z-index: 25;
  display: flex; align-items: center; gap: 12px;
  max-width: 1480px; margin: 0 auto; padding: 10px 24px;
  min-height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; min-width: 0; margin-right: auto; padding: 4px 0; }
.brand img { width: 40px; height: 40px; border-radius: 10px; flex: none; }
.brand-name { font-weight: 700; font-size: 17px; line-height: 1.15; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-name .sub { font-weight: 500; color: var(--muted); }
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  color: var(--ink); text-decoration: none; font-weight: 600; font-size: 15px;
  padding: 10px 12px; border-radius: 999px; min-height: 44px; display: inline-flex; align-items: center;
}
.site-nav a:hover { background: var(--accent-soft); }
.site-nav a[aria-current="page"] { color: var(--accent); }
.ui-toggle {
  border: 1.5px solid var(--rule); background: var(--card); border-radius: 999px; cursor: pointer;
  min-height: 44px; padding: 6px 14px; font-weight: 700; font-size: 14px; display: inline-flex; align-items: center; gap: 6px;
}
.ui-toggle:hover { border-color: var(--accent); }
.ui-toggle .flag { font-size: 12px; letter-spacing: .06em; color: var(--muted); }
@media (max-width: 720px) {
  .site-head { padding: 8px 12px 8px 16px; gap: 4px; min-height: 56px; }
  .brand img { width: 34px; height: 34px; }
  .brand-name .sub { display: none; }
  .site-nav a { padding: 8px 9px; font-size: 14px; }
  .site-nav .nav-yt { display: none; }
  .ui-toggle { padding: 6px 10px; }
  .ui-toggle .long { display: none; }
}
@media (max-width: 360px) {
  .site-nav .nav-about { display: none; }
}

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--rule); margin-top: 40px; color: var(--muted); font-size: 15px; }
.foot-in { max-width: 1100px; margin: 0 auto; padding: 28px 24px 40px; display: grid; gap: 14px; }
.foot-in p { margin: 0; max-width: 62ch; }
.foot-links { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.foot-links a { color: var(--ink); font-weight: 600; min-height: 40px; display: inline-flex; align-items: center; }
.foot-small { font-size: 13.5px; }

/* ---------- page shells ---------- */
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.prose { max-width: 720px; margin: 0 auto; padding: 24px 24px 8px; font-size: 17px; line-height: 1.6; }
.prose h1 { font-family: var(--font-nl); font-size: clamp(32px, 5vw, 44px); line-height: 1.12; margin: 12px 0 16px; }
.prose h2 { font-size: 21px; margin: 32px 0 8px; line-height: 1.3; }
.prose p, .prose ul { margin: 0 0 14px; }
.prose li { margin: 6px 0; }
.prose .lead { font-size: 19px; color: var(--muted); }
.prose .box { background: var(--card); border: 1px solid var(--rule); border-radius: 16px; padding: 16px 20px; margin: 18px 0; }
.prose .box ul { margin: 0; padding-left: 20px; }
.prose .updated { color: var(--muted); font-size: 15px; margin-top: 28px; }
@media (max-width: 720px) { .prose { padding: 16px 16px 8px; font-size: 16.5px; } .wrap { padding: 0 16px; } }

/* ---------- landing ---------- */
.hero {
  max-width: 1100px; margin: 0 auto; padding: 24px 24px 8px;
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr); gap: 32px; align-items: center;
}
.hero-kicker { margin: 0 0 10px; font-weight: 700; color: var(--accent); letter-spacing: .02em; }
.hero h1 { font-family: var(--font-nl); font-size: clamp(36px, 5.2vw, 60px); line-height: 1.05; margin: 0 0 16px; letter-spacing: -.01em; }
.hero h1 .mark { background: linear-gradient(transparent 60%, #ffe27a 60%, #ffe27a 92%, transparent 92%); }
:root[data-theme="dark"] .hero h1 .mark { background: linear-gradient(transparent 60%, rgba(255, 214, 92, .35) 60%, rgba(255, 214, 92, .35) 92%, transparent 92%); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hero h1 .mark { background: linear-gradient(transparent 60%, rgba(255, 214, 92, .35) 60%, rgba(255, 214, 92, .35) 92%, transparent 92%); } }
.hero .lead { font-size: 19px; line-height: 1.55; color: var(--muted); margin: 0 0 22px; max-width: 56ch; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-art { justify-self: center; width: 100%; max-width: 360px; }
.hero-art img { display: block; width: 100%; height: auto; border-radius: 28px; }
.steps {
  max-width: 1100px; margin: 28px auto 0; padding: 0 24px;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; list-style: none;
  counter-reset: step;
}
.steps li { background: var(--card); border: 1px solid var(--rule); border-radius: 18px; padding: 16px 18px; counter-increment: step; }
.steps b { display: block; font-size: 18px; margin-bottom: 2px; }
.steps b::before {
  content: counter(step); display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 15px; margin-right: 8px; vertical-align: 1px;
}
:root[data-theme="dark"] .steps b::before { color: #10141f; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .steps b::before { color: #10141f; } }
.steps span { color: var(--muted); font-size: 15.5px; }
.features { max-width: 1100px; margin: 14px auto 0; padding: 0 24px; color: var(--muted); font-size: 15.5px; }
.features p { margin: 0; background: var(--accent-soft); color: var(--ink); border-radius: 14px; padding: 12px 16px; }

.lessons { max-width: 1100px; margin: 36px auto 0; padding: 0 24px; scroll-margin-top: 12px; }
.lessons > h2 { font-family: var(--font-nl); font-size: clamp(28px, 3.4vw, 38px); margin: 0 0 10px; }
.level-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; padding: 0; list-style: none; }
.level-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 6px 16px; border-radius: 999px;
  background: var(--card); border: 1.5px solid var(--rule); color: var(--ink); text-decoration: none; font-weight: 700;
}
.level-nav a:hover { border-color: var(--accent); }
.level-nav .n { color: var(--muted); font-weight: 600; margin-left: 6px; font-size: 14px; }
.group { margin: 26px 0 0; scroll-margin-top: 12px; }
.group h3 { font-size: 22px; margin: 0; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.group h3 .lvl-badge { font-size: 15px; }
.group > p { margin: 2px 0 12px; color: var(--muted); }
.group .empty { background: var(--card); border: 1px dashed var(--rule); border-radius: 16px; padding: 14px 16px; color: var(--muted); margin: 0; }
.lvl-badge {
  display: inline-block; background: var(--accent); color: #fff; border-radius: 7px; padding: 1px 8px; font-weight: 700; letter-spacing: .02em;
}
.lvl-badge.alt { background: var(--accent-2); }
:root[data-theme="dark"] .lvl-badge { color: #10141f; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .lvl-badge { color: #10141f; } }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 16px; }
.card {
  display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--rule); border-radius: 18px;
  overflow: hidden; color: var(--ink); text-decoration: none; position: relative;
}
.card:hover { border-color: var(--accent); }
.card:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.card-img { aspect-ratio: 16 / 9; background: var(--rule); display: block; position: relative; }
.card-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card-dur {
  position: absolute; right: 8px; bottom: 8px; background: rgba(0, 0, 0, .72); color: #fff;
  font-size: 13px; font-weight: 700; padding: 2px 7px; border-radius: 6px;
}
.card-soon {
  align-self: flex-start; margin-top: 8px; background: var(--accent-2); color: #fff;
  font-size: 13px; font-weight: 700; padding: 3px 10px; border-radius: 999px;
}
:root[data-theme="dark"] .card-soon { color: #10141f; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .card-soon { color: #10141f; } }
.card-body { padding: 12px 16px 16px; display: flex; flex-direction: column; gap: 2px; }
.card-meta { font-size: 13px; font-weight: 700; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; display: flex; gap: 8px; align-items: center; }
.card-meta .lvl-badge { font-size: 12px; }
.card-title { font-family: var(--font-nl); font-size: 22px; font-weight: 700; line-height: 1.2; margin-top: 4px; }
.card-en { color: var(--muted); font-size: 15.5px; }
.card-facts { color: var(--muted); font-size: 14px; margin-top: 6px; }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 8px; padding: 12px 16px 0; }
  .hero-art { order: -1; max-width: none; }
  .hero-art img { height: 190px; object-fit: cover; object-position: 50% 18%; border-radius: 20px; }
  .hero .lead { font-size: 17.5px; }
  .steps { grid-template-columns: 1fr; padding: 0 16px; gap: 10px; margin-top: 22px; }
  .features { padding: 0 16px; }
  .lessons { padding: 0 16px; margin-top: 30px; }
  .cards { grid-template-columns: 1fr; gap: 12px; }
  .card { flex-direction: row; }
  .card-img { width: 42%; flex: none; aspect-ratio: auto; }
  .card-body { padding: 10px 12px 12px; }
  .card-title { font-size: 19px; }
  .card-en { font-size: 14.5px; }
  .card-dur { font-size: 12px; right: 6px; bottom: 6px; }
  .card-soon { font-size: 12px; padding: 2px 8px; margin-top: 6px; }
  .card-facts { font-size: 13px; }
}

/* ---------- under a lesson ---------- */
.ep-more { max-width: 1100px; margin: 28px auto 0; padding: 0 24px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 28px; }
.ep-more h2 { font-size: 21px; margin: 0 0 8px; }
.ep-more p { margin: 0 0 12px; color: var(--muted); }
.chapters { list-style: none; padding: 0; margin: 0 0 14px; }
.chapters li { display: flex; gap: 12px; padding: 7px 0; border-bottom: 1px solid var(--rule); }
.chapters .tc { font-variant-numeric: tabular-nums; color: var(--muted); min-width: 3.2em; font-weight: 600; }
.chapters a { color: var(--ink); }
.ep-nav { display: flex; flex-direction: column; gap: 10px; }
.ep-nav a.card { flex-direction: row; }
.ep-nav .card-img { width: 40%; flex: none; aspect-ratio: auto; }
.ep-nav .card-title { font-size: 18px; }
.ep-nav .dir { font-size: 13px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: .05em; }
@media (max-width: 820px) { .ep-more { grid-template-columns: 1fr; padding: 0 16px; } }

/* ---------- 404 ---------- */
.nf { max-width: 640px; margin: 0 auto; padding: 48px 24px 24px; }
.nf h1 { font-family: var(--font-nl); font-size: 40px; margin: 0 0 10px; }
.nf p { font-size: 18px; color: var(--muted); }