:root {
    --bg:        #f3f6fb;
    --surface:   #ffffff;
    --ink:       #151a26;
    --ink-soft:  #5d6678;
    --line:      #e6e9f1;

    --brand:     #2f6bed;   --brand-strong: #2459d6;  --brand-soft: #e7eefc;
    --good:      #19a96a;   --good-soft: #e0f4ea;
    --bad:       #e5484d;   --bad-soft: #fbe7e8;
    --warn:      #ef9d23;   --warn-soft: #fdefd5;

    --radius:    22px;  --radius-sm: 13px;
    --shadow:    0 1px 2px rgba(21,26,38,.05), 0 14px 40px rgba(21,26,38,.08);
    --shadow-lg: 0 30px 64px rgba(21,26,38,.14);
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body { font-family: 'Plus Jakarta Sans', system-ui, sans-serif; background: var(--bg); color: var(--ink);
    -webkit-font-smoothing: antialiased; line-height: 1.55; }
  a { text-decoration: none; color: inherit; }
  .wrap { max-width: 760px; margin: 0 auto; padding: 0 22px; }

  .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; cursor: pointer; border: none; font-family: inherit;
    font-weight: 700; font-size: 15px; padding: 13px 22px; border-radius: 999px; transition: .16s; }
  .btn svg { width: 17px; height: 17px; }
  .btn-brand { background: var(--brand); color: #fff; }
  .btn-brand:hover { background: var(--brand-strong); transform: translateY(-1px); }
  .btn-ghost { background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
  .btn-ghost:hover { color: var(--brand); }
  .btn-block { width: 100%; }
  .btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

  header.nav { position: sticky; top: 0; z-index: 50; background: rgba(243,246,251,.86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
  .nav-inner { max-width: 760px; margin: 0 auto; padding: 0 22px; display: flex; align-items: center; justify-content: space-between; height: 66px; }
  .brand { display: flex; align-items: center; gap: 11px; cursor: pointer; }
  .logo { width: 37px; height: 37px; border-radius: 11px; background: var(--brand); display: grid; place-items: center; color: #fff; }
  .logo svg { width: 21px; height: 21px; }
  .brand h1 { font-size: 19px; font-weight: 800; letter-spacing: -.4px; }
  .nav-right { font-size: 13.5px; color: var(--ink-soft); font-weight: 600; display: flex; align-items: center; gap: 12px; }
  .nav-right .who { max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink); font-weight: 700; }
  @media (max-width: 540px) { .nav-right .who { max-width: 110px; } }
  .linkbtn { background: none; border: none; font-family: inherit; font-size: 13.5px; font-weight: 700; color: var(--brand); cursor: pointer; padding: 0; }
  .linkbtn:hover { color: var(--brand-strong); text-decoration: underline; }

  /* login / registratie */
  .auth { max-width: 420px; margin: 10px auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 30px 26px; }
  .auth h2 { font-size: 26px; font-weight: 800; letter-spacing: -.6px; }
  .auth .sub { font-size: 14px; color: var(--ink-soft); margin: 8px 0 20px; }
  .auth .field { margin-bottom: 14px; }
  .auth .field label { display: block; font-size: 12.5px; font-weight: 700; color: var(--ink-soft); margin-bottom: 6px; }
  .auth .field input { width: 100%; font-family: inherit; font-size: 15px; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); color: var(--ink); transition: .14s; }
  .auth .field input:focus { outline: none; border-color: var(--brand); background: var(--surface); }
  .auth .authmsg { display: none; font-size: 13.5px; font-weight: 600; padding: 10px 13px; border-radius: var(--radius-sm); margin-bottom: 14px; }
  .auth .authmsg.show { display: block; }
  .auth .authmsg.ok { background: var(--good-soft); color: var(--good); }
  .auth .authmsg.no { background: var(--bad-soft); color: var(--bad); }
  .auth .authswitch { text-align: center; font-size: 13.5px; color: var(--ink-soft); margin-top: 16px; }

  main { padding: 30px 0 50px; }

  /* home */
  .hero { text-align: center; margin-bottom: 28px; }
  .eyebrow { display: inline-flex; align-items: center; gap: 8px; background: var(--brand-soft); color: var(--brand-strong); font-size: 13px; font-weight: 700; padding: 7px 14px; border-radius: 999px; margin-bottom: 18px; }
  .eyebrow .d { width: 7px; height: 7px; border-radius: 50%; background: var(--brand); }
  .hero h2 { font-size: 38px; line-height: 1.1; font-weight: 800; letter-spacing: -1.2px; }
  .hero p { font-size: 17px; color: var(--ink-soft); margin: 14px auto 0; max-width: 520px; }
  @media (max-width: 540px) { .hero h2 { font-size: 30px; } }

  .modes { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 26px; }
  @media (max-width: 560px) { .modes { grid-template-columns: 1fr; } }
  .mode { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); cursor: pointer; transition: .16s; text-align: left; }
  .mode:hover { transform: translateY(-3px); border-color: var(--brand); }
  .mode .ic { width: 46px; height: 46px; border-radius: 12px; background: var(--brand-soft); color: var(--brand-strong); display: grid; place-items: center; margin-bottom: 13px; }
  .mode .ic svg { width: 23px; height: 23px; }
  .mode h3 { font-size: 18px; font-weight: 700; letter-spacing: -.2px; }
  .mode p { font-size: 13.5px; color: var(--ink-soft); margin-top: 5px; }

  .panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
  .panel .lab { font-size: 12.5px; font-weight: 700; color: var(--ink-soft); margin-bottom: 12px; }
  .cats { display: flex; flex-wrap: wrap; gap: 9px; }
  .cat { cursor: pointer; border: 1.5px solid var(--line); background: var(--surface); border-radius: 999px; padding: 9px 15px; font-size: 13.5px; font-weight: 700; color: var(--ink); transition: .14s; display: inline-flex; align-items: center; gap: 8px; }
  .cat:hover { border-color: var(--brand); color: var(--brand); }
  .cat.on { background: var(--brand); border-color: var(--brand); color: #fff; }
  .cat small { color: var(--ink-soft); font-weight: 600; }

  .laststat { text-align: center; margin-top: 22px; font-size: 13.5px; color: var(--ink-soft); }
  .laststat b { color: var(--ink); }

  /* statistiek per onderwerp */
  .stats { display: flex; flex-direction: column; gap: 8px; }
  .stat { display: grid; grid-template-columns: 92px 1fr 42px 46px; align-items: center; gap: 11px; width: 100%; cursor: pointer;
    font-family: inherit; text-align: left; background: var(--surface); border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 10px 13px; transition: .14s; }
  .stat:hover { border-color: var(--brand); }
  .stat .sk { font-size: 13.5px; font-weight: 700; color: var(--ink); }
  .stat .sbar { height: 8px; border-radius: 999px; background: var(--bg); overflow: hidden; }
  .stat .sbar > i { display: block; height: 100%; border-radius: 999px; }
  .stat .sv { font-size: 13.5px; font-weight: 800; text-align: right; }
  .stat .sn { font-size: 12px; font-weight: 600; color: var(--ink-soft); text-align: right; }
  .stat.good .sbar > i { background: var(--good); } .stat.good .sv { color: var(--good); }
  .stat.mid  .sbar > i { background: var(--warn); } .stat.mid  .sv { color: var(--warn); }
  .stat.bad  .sbar > i { background: var(--bad); }  .stat.bad  .sv { color: var(--bad); }
  @media (max-width: 480px) { .stat { grid-template-columns: 78px 1fr 38px; } .stat .sn { display: none; } }

  /* quiz */
  .qbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
  .qbar .count { font-size: 13.5px; font-weight: 700; color: var(--ink-soft); }
  .qbar .cat-pill { font-size: 12px; font-weight: 700; color: var(--brand-strong); background: var(--brand-soft); padding: 5px 11px; border-radius: 999px; }
  .pbar { height: 8px; border-radius: 999px; background: var(--line); overflow: hidden; margin-bottom: 20px; }
  .pbar > i { display: block; height: 100%; background: var(--brand); border-radius: 999px; transition: width .3s ease; }

  .qcard { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 26px; }
  .zwaar-tag { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; font-weight: 700; color: #b46a08; background: var(--warn-soft); padding: 5px 11px; border-radius: 999px; margin-bottom: 12px; }
  .zwaar-tag svg { width: 13px; height: 13px; }
  .sign { width: 120px; height: 120px; margin: 0 auto 18px; display: block; }
  .qtext { font-size: 20px; font-weight: 700; letter-spacing: -.3px; margin-bottom: 18px; }

  .opts { display: flex; flex-direction: column; gap: 10px; }
  .opt { display: flex; align-items: center; gap: 13px; text-align: left; width: 100%; cursor: pointer; font-family: inherit;
    background: var(--surface); border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 14px 16px; font-size: 15px; font-weight: 600; color: var(--ink); transition: .14s; }
  .opt:hover:not(:disabled) { border-color: var(--brand); }
  .opt .key { width: 26px; height: 26px; border-radius: 8px; background: var(--bg); color: var(--ink-soft); display: grid; place-items: center; font-size: 13px; font-weight: 800; flex: none; transition: .14s; }
  .opt.sel { border-color: var(--brand); background: var(--brand-soft); }
  .opt.sel .key { background: var(--brand); color: #fff; }
  .opt.correct { border-color: var(--good); background: var(--good-soft); }
  .opt.correct .key { background: var(--good); color: #fff; }
  .opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
  .opt.wrong .key { background: var(--bad); color: #fff; }
  .opt:disabled { cursor: default; }

  .uitleg { display: none; margin-top: 16px; padding: 14px 16px; border-radius: var(--radius-sm); font-size: 14px; }
  .uitleg.show { display: block; }
  .uitleg.ok { background: var(--good-soft); }
  .uitleg.no { background: var(--bad-soft); }
  .uitleg b { font-weight: 700; }
  .qactions { display: flex; gap: 10px; margin-top: 20px; }
  .verified { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; font-size: 12px; font-weight: 700; color: var(--good); background: var(--good-soft); padding: 5px 11px; border-radius: 999px; }
  .verified svg { width: 13px; height: 13px; }

  /* result */
  .result { text-align: center; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 34px 26px; }
  .scoreRing { width: 150px; height: 150px; margin: 0 auto 18px; position: relative; }
  .scoreRing .c { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; }
  .scoreRing .c b { font-size: 40px; font-weight: 800; letter-spacing: -1.5px; line-height: 1; }
  .scoreRing .c small { display: block; font-size: 12px; color: var(--ink-soft); font-weight: 700; margin-top: 3px; }
  .verdict { font-size: 24px; font-weight: 800; letter-spacing: -.5px; }
  .verdict.ok { color: var(--good); }
  .verdict.no { color: var(--bad); }
  .result p.sub { font-size: 14.5px; color: var(--ink-soft); margin-top: 8px; }
  .result-actions { display: flex; gap: 10px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }

  .review { margin-top: 26px; text-align: left; }
  .review h4 { font-size: 16px; font-weight: 700; margin-bottom: 12px; }
  .rev-item { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 16px; margin-bottom: 10px; }
  .rev-item .q { font-size: 14.5px; font-weight: 700; }
  .rev-item .a { font-size: 13.5px; margin-top: 7px; }
  .rev-item .a .x { color: var(--bad); font-weight: 700; }
  .rev-item .a .v { color: var(--good); font-weight: 700; }
  .rev-item .u { font-size: 13px; color: var(--ink-soft); margin-top: 6px; }

  footer { border-top: 1px solid var(--line); padding: 24px 0 36px; }
  .disc { font-size: 12.5px; color: var(--ink-soft); text-align: center; max-width: 600px; margin: 0 auto; }