/* ============================================================================
   Platform Design System (M1) — één taal voor NetLab + CodeForge.
   Donker NOC-thema (behouden), rustiger + consistent. WCAG 2.2 AA focus.
   ============================================================================ */
:root{
  --bg:#0a0e16; --bg2:#0e1420; --panel:#111826; --panel2:#141d2e; --panel3:#1a2436;
  --line:#1e2a3d; --line2:#2b3a52;
  --ink:#e6edf5; --dim:#9fb0c6; --dim2:#5d7291;
  --teal:#4fd1c5; --teal-dim:#2a7d76;
  --orange:#f6a94a; --purple:#a78bfa;
  --ok:#6bbf7b; --bad:#e0645f; --warn:#f6a94a;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --radius:12px; --radius-sm:8px;
  --shadow:0 8px 30px rgba(0,0,0,.4);
  --focus:0 0 0 3px rgba(79,209,197,.55);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
/* [hidden] moet altijd winnen van .field/.shell/.auth-wrap display-regels */
[hidden]{display:none !important}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}

/* focus zichtbaar op ALLES wat focusbaar is (A11Y) */
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px}
.skip-link{position:absolute;left:-999px;top:8px;z-index:1000;background:var(--teal);color:#04120f;padding:8px 14px;border-radius:8px;font-weight:700}
.skip-link:focus{left:8px}

/* ---- knoppen (echte <button>/<a>, niet div) ---- */
.btn{display:inline-flex;align-items:center;gap:8px;font:inherit;font-weight:600;cursor:pointer;
  border-radius:var(--radius-sm);padding:10px 18px;border:1px solid var(--line2);
  background:var(--panel2);color:var(--ink);min-height:44px;transition:.13s}
.btn:hover{border-color:var(--teal);background:var(--panel3)}
.btn.primary{background:var(--teal);color:#04120f;border-color:var(--teal)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ---- AppShell layout ---- */
.shell{display:grid;grid-template-columns:230px 1fr;grid-template-rows:56px 1fr;
  grid-template-areas:"brand header" "nav main";min-height:100vh}
.brand{grid-area:brand;display:flex;align-items:center;gap:9px;padding:0 18px;
  border-bottom:1px solid var(--line);border-right:1px solid var(--line);font-weight:800;letter-spacing:.5px}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--teal);box-shadow:0 0 10px var(--teal)}
.topbar{grid-area:header;display:flex;align-items:center;gap:14px;padding:0 20px;border-bottom:1px solid var(--line)}
.topbar .crumbs{color:var(--dim);font-size:13.5px}
.topbar .spacer{flex:1}
.xp-pill{font-family:var(--mono);font-size:13px;background:var(--panel2);border:1px solid var(--line2);
  padding:6px 14px;border-radius:20px;color:var(--teal)}
.usermenu{display:flex;align-items:center;gap:8px}

.sidenav{grid-area:nav;border-right:1px solid var(--line);padding:14px 10px;overflow-y:auto}
.navgroup{margin-bottom:6px}
.navgroup>.navitem{width:100%}
.navitem{display:flex;align-items:center;gap:11px;width:100%;text-align:left;font:inherit;
  background:transparent;border:none;color:var(--dim);padding:10px 12px;border-radius:8px;cursor:pointer;min-height:44px}
.navitem:hover{background:var(--panel2);color:var(--ink)}
.navitem[aria-current="page"]{background:var(--panel3);color:var(--teal);font-weight:600}
.navitem .ic{font-size:17px;width:22px;text-align:center}
.subnav{margin:2px 0 8px 14px;border-left:1px solid var(--line);padding-left:6px}
.subnav .navitem{font-size:13.5px;padding:7px 10px;min-height:38px}

.main{grid-area:main;padding:24px 28px;overflow-y:auto;max-width:1100px}
.view{display:none}
.view.active{display:block}
h1{font-size:24px;margin:0 0 6px}
h1 small{font-size:14px;color:var(--dim);font-weight:400}
.lead{color:var(--dim);margin:0 0 20px;max-width:640px}
.section-h{font-size:16px;margin:24px 0 12px}

/* ---- kaarten: echte <a>/<button>, semantisch ---- */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.card{display:block;text-align:left;font:inherit;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:16px;cursor:pointer;color:var(--ink);transition:.13s;width:100%}
.card:hover{border-color:var(--teal);transform:translateY(-2px);text-decoration:none}
.card .card-ic{font-size:22px;margin-bottom:8px}
.card h3{margin:0 0 4px;font-size:15.5px}
.card .card-meta{font-size:12px;color:var(--dim2);font-family:var(--mono);display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.card .badge{padding:2px 8px;border-radius:20px;font-size:11px;border:1px solid var(--line2)}
.badge.done{color:var(--ok);border-color:var(--ok)}
.badge.locked{color:var(--dim2)}
.locked-card{cursor:not-allowed;opacity:.72}
.locked-card:hover{border-color:var(--line);transform:none}
.lock-reason{font-size:12.5px;color:var(--warn);margin:10px 0 0}
.card-bar{height:5px;background:var(--panel3);border-radius:4px;overflow:hidden;margin-top:10px}
.card-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--orange))}
.learning-track+.learning-track{margin-top:28px;padding-top:4px;border-top:1px solid var(--line)}
.learning-track .card-grid{list-style:none;padding:0;margin:0}
.track-copy{color:var(--dim);margin:-6px 0 12px;font-size:13.5px}

/* ---- async states (idle/loading/success/empty/error) ---- */
.state{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center;color:var(--dim)}
.state.error{border-color:var(--bad);color:var(--bad)}
.state .state-ic{font-size:30px;margin-bottom:8px}
.spinner{width:26px;height:26px;border:3px solid var(--line2);border-top-color:var(--teal);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 10px}
@keyframes spin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){.spinner{animation:none}.card:hover{transform:none}}

/* ---- login ---- */
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.auth-card{background:var(--panel);border:1px solid var(--line2);border-radius:16px;padding:32px;width:100%;max-width:400px}
.auth-card h1{text-align:center}
.auth-card .brand-lg{text-align:center;font-weight:800;font-size:20px;letter-spacing:1px;margin-bottom:6px}
.auth-card .brand-lg .dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--teal);margin-right:6px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:13px;color:var(--dim);font-weight:600}
.field input{background:#070a11;border:1px solid var(--line2);border-radius:8px;color:var(--ink);padding:11px;font:inherit;min-height:44px}
.field input:focus-visible{border-color:var(--teal)}
.auth-msg{margin-top:12px;font-size:13.5px;min-height:20px}
.auth-msg.err{color:var(--bad)}
.auth-msg.ok{color:var(--ok)}
.auth-toggle{text-align:center;margin-top:16px;font-size:13.5px;color:var(--dim)}
.auth-toggle button{background:none;border:none;color:var(--teal);cursor:pointer;font:inherit;font-weight:600}

/* ---- mobiel: drawer ---- */
.navtoggle{display:none;background:none;border:1px solid var(--line2);color:var(--ink);border-radius:8px;width:44px;height:44px;cursor:pointer;font-size:18px}
@media(max-width:820px){
  .shell{grid-template-columns:1fr;grid-template-rows:56px 1fr;grid-template-areas:"header header" "main main"}
  .brand{display:none}
  .navtoggle{display:inline-flex;align-items:center;justify-content:center}
  .sidenav{position:fixed;top:0;left:0;bottom:0;width:250px;background:var(--bg2);z-index:50;
    transform:translateX(-100%);transition:transform .2s;border-right:1px solid var(--line2)}
  .sidenav.open{transform:translateX(0)}
  .scrim{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:40}
  .scrim.show{display:block}
  .main{padding:18px 16px}
}
@media(prefers-reduced-motion:reduce){.sidenav{transition:none}}

/* ---- inline les-content (markdown) ---- */
.md{font-size:14.5px;line-height:1.65;color:var(--ink)}
.md h2{font-size:18px;margin:18px 0 8px}
.md h3{font-size:15.5px;margin:16px 0 6px;color:var(--teal)}
.md h4{font-size:14px;margin:12px 0 4px;color:var(--dim)}
.md p{margin:8px 0}
.md ul{margin:8px 0;padding-left:20px}
.md li{margin:3px 0}
.md code{font-family:var(--mono);background:var(--panel3);padding:1px 6px;border-radius:5px;font-size:13px;color:var(--orange)}
.md b{color:var(--ink)}
.md-table-wrap{max-width:100%;overflow-x:auto;margin:14px 0;border:1px solid var(--border);border-radius:8px}
.md table{width:100%;border-collapse:collapse;min-width:480px;background:var(--panel2)}
.md th,.md td{padding:9px 11px;text-align:left;vertical-align:top;border-right:1px solid var(--border);border-bottom:1px solid var(--border)}
.md th:last-child,.md td:last-child{border-right:0}
.md tbody tr:last-child td{border-bottom:0}
.md th{font-family:var(--mono);font-size:12px;letter-spacing:.03em;color:var(--teal);background:var(--panel3)}

/* ---- mastery assessment ---- */
.assessment-nav{margin-bottom:12px}
.assessment-form{max-width:820px;display:grid;gap:16px}
.assessment-block,.integrity-box{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.assessment-block h2,.integrity-box h2{font-size:17px;margin:0 0 10px}
.assessment-kicker{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);font-weight:700}
.quiz-question{border:0;border-top:1px solid var(--line);margin:16px 0 0;padding:16px 0 0}
.quiz-question legend{font-weight:650;padding:0 0 10px}
.option{display:flex;align-items:flex-start;gap:9px;padding:10px 12px;margin:6px 0;border:1px solid var(--line);border-radius:8px;cursor:pointer;background:var(--bg2)}
.option:hover{border-color:var(--teal)}
.option:has(input:checked){border-color:var(--teal);background:rgba(79,209,197,.08)}
.option input{margin-top:4px;accent-color:var(--teal)}
.assessment-block>label{display:block;color:var(--dim);font-size:13px;font-weight:650;margin:14px 0 6px}
.assessment-block textarea{width:100%;resize:vertical;background:#070a11;border:1px solid var(--line2);border-radius:8px;color:var(--ink);padding:12px;font:13px/1.55 var(--mono)}
.assessment-block textarea:focus{border-color:var(--teal);outline:0;box-shadow:var(--focus)}
.rubric-note{font:12px/1.55 var(--mono);color:var(--dim);background:var(--panel3);border-left:3px solid var(--orange);padding:10px 12px;margin:12px 0}
.integrity-box{border-style:dashed;color:var(--dim)}
.integrity-box label{display:block;margin:8px 0;color:var(--ink)}
.integrity-box input{accent-color:var(--orange)}
.assessment-submit{justify-content:center;min-height:50px}
.result-hero{display:flex;align-items:center;gap:16px;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:16px;background:var(--panel)}
.result-hero.pass{border-color:var(--ok)}.result-hero.fail{border-color:var(--bad)}
.result-hero h1,.result-hero p{margin:2px 0}.result-hero p{color:var(--dim)}
.result-mark{display:grid;place-items:center;width:52px;height:52px;flex:0 0 52px;border-radius:50%;font-size:30px;font-weight:800}
.pass .result-mark{background:rgba(107,191,123,.14);color:var(--ok)}.fail .result-mark{background:rgba(224,100,95,.14);color:var(--bad)}
.score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.score-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);padding:13px}
.score-card>div:first-child{display:flex;justify-content:space-between;gap:8px}.score-card span{font-family:var(--mono);color:var(--dim)}.score-card small{display:block;font-size:9px;text-align:right}
.scorebar{height:5px;background:var(--panel3);border-radius:5px;overflow:hidden;margin-top:10px}.scorebar i{display:block;height:100%}.scorebar .ok{background:var(--ok)}.scorebar .bad{background:var(--bad)}
.check-list{list-style:none;padding:0;margin:0}.check-list li{padding:7px 0;border-bottom:1px solid var(--line)}.check-list li:last-child{border:0}.check-list .ok{color:var(--ok)}.check-list .bad{color:var(--bad)}.check-list small{color:var(--dim);font-family:var(--mono)}
.result-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
@media(max-width:620px){.score-grid{grid-template-columns:1fr}.assessment-block,.integrity-box{padding:16px}.result-hero{align-items:flex-start}.usermenu #userName{display:none}}