/* Cybersäkerhet Labbkurs — multi-page course shell.
   Layout: fixed unit index + reading column; index becomes a drawer on phones.
   Palette: amber marks a weakness, teal marks the defense that answers it.
   Neutrals carry a slight green-grey bias toward the teal. */
:root{
  --bg:#F5F7F6; --surface:#FFFFFF; --surface-2:#ECF0EE;
  --fg:#15201E; --fg-muted:#566663; --fg-faint:#7E8D8A;
  --rule:#D7DEDB; --rule-soft:#E6EBE9;
  --defend:#0C6B5F; --defend-soft:#E2F0ED; --defend-line:#A9D3CB;
  --weak:#8A4E06; --weak-soft:#FBEEDC; --weak-line:#E6C48E;
  --note:#2C4C86; --note-soft:#E6EDF8; --note-line:#B5C8E6;
  --bad:#9B2C20; --bad-soft:#FBE9E6; --bad-line:#E6B3AB;
  --code-bg:#F1F4F3; --code-fg:#1C2927;
  --tok-key:#8A3A6B; --tok-str:#2F6B3C; --tok-com:#74837F; --tok-num:#9A5B00; --tok-fn:#2C4C86;
  --on-accent:#FFFFFF;
  --font-ui:"IBM Plex Sans","Segoe UI",system-ui,-apple-system,sans-serif;
  --font-body:"IBM Plex Serif",Georgia,"Times New Roman",serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --rail:300px;
  --gut-l:max(16px,env(safe-area-inset-left,0px));
  --gut-r:max(16px,env(safe-area-inset-right,0px));
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#101A1D; --surface:#162226; --surface-2:#1E2C30;
    --fg:#E2E9E7; --fg-muted:#9DAEAB; --fg-faint:#7A8C89;
    --rule:#2B3B3F; --rule-soft:#223034;
    --defend:#63C9B8; --defend-soft:#15302E; --defend-line:#2C5B55;
    --weak:#E0A456; --weak-soft:#30260F; --weak-line:#5E4A22;
    --note:#8FB2E8; --note-soft:#182536; --note-line:#2E4365;
    --bad:#E89385; --bad-soft:#331C18; --bad-line:#5E3029;
    --code-bg:#0C1416; --code-fg:#D6E0DE;
    --tok-key:#E093C0; --tok-str:#8FCF9B; --tok-com:#6E807D; --tok-num:#E0A456; --tok-fn:#8FB2E8;
    --on-accent:#0B1416;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#101A1D; --surface:#162226; --surface-2:#1E2C30;
  --fg:#E2E9E7; --fg-muted:#9DAEAB; --fg-faint:#7A8C89;
  --rule:#2B3B3F; --rule-soft:#223034;
  --defend:#63C9B8; --defend-soft:#15302E; --defend-line:#2C5B55;
  --weak:#E0A456; --weak-soft:#30260F; --weak-line:#5E4A22;
  --note:#8FB2E8; --note-soft:#182536; --note-line:#2E4365;
  --bad:#E89385; --bad-soft:#331C18; --bad-line:#5E3029;
  --code-bg:#0C1416; --code-fg:#D6E0DE;
  --tok-key:#E093C0; --tok-str:#8FCF9B; --tok-com:#6E807D; --tok-num:#E0A456; --tok-fn:#8FB2E8;
  --on-accent:#0B1416;
  color-scheme:dark;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--fg);font-family:var(--font-body);
  font-size:1rem;line-height:1.68;-webkit-text-size-adjust:100%}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);
  background:var(--surface);z-index:60}

/* ---------- topbar ---------- */
.topbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;
  background:var(--surface);border-bottom:1px solid var(--rule)}
.topbar-in{display:flex;align-items:center;gap:13px;
  padding-left:var(--gut-l);padding-right:var(--gut-r);padding-block:10px;min-height:58px}
.brand{display:flex;align-items:baseline;gap:10px;min-width:0;margin-right:auto;
  text-decoration:none;color:inherit}
.brand-mark{font-family:var(--font-mono);font-size:.66rem;font-weight:500;letter-spacing:.14em;
  text-transform:uppercase;color:var(--defend);border:1px solid var(--defend-line);
  background:var(--defend-soft);padding:3px 7px;border-radius:3px;white-space:nowrap}
.brand-name{font-family:var(--font-ui);font-weight:600;font-size:1rem;letter-spacing:-.01em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-tools{display:flex;align-items:center;gap:8px;flex-shrink:0}
.seg{display:inline-flex;border:1px solid var(--rule);border-radius:5px;overflow:hidden;background:var(--bg)}
.seg button{font-family:var(--font-mono);font-size:.72rem;font-weight:500;letter-spacing:.08em;
  padding:6px 11px;border:0;background:transparent;color:var(--fg-muted);cursor:pointer;line-height:1.4}
.seg button[aria-pressed="true"]{background:var(--defend);color:var(--on-accent)}
.icon-btn{width:34px;height:32px;display:inline-grid;place-items:center;border:1px solid var(--rule);
  border-radius:5px;background:var(--bg);color:var(--fg-muted);cursor:pointer;padding:0}
.icon-btn:hover{color:var(--fg);border-color:var(--fg-faint)}
.icon-btn svg{width:16px;height:16px;display:block}
.menu-btn{display:none}
.prog{display:flex;align-items:center;gap:9px;flex-shrink:0}
.prog-track{width:90px;height:5px;background:var(--surface-2);border-radius:3px;overflow:hidden}
.prog-fill{height:100%;width:0%;background:var(--defend);border-radius:3px;transition:width .3s ease}
.prog-num{font-family:var(--font-mono);font-size:.72rem;font-variant-numeric:tabular-nums;
  color:var(--fg-muted);white-space:nowrap}

/* ---------- layout ---------- */
.layout{display:grid;grid-template-columns:var(--rail) minmax(0,1fr);align-items:start}
.rail{position:sticky;top:calc(env(safe-area-inset-top,0px) + 58px);
  height:calc(100vh - 58px - env(safe-area-inset-top,0px));overflow-y:auto;overscroll-behavior:contain;
  border-right:1px solid var(--rule);background:var(--surface);
  padding-left:var(--gut-l);padding-right:10px;padding-block:20px 40px}
.rail-group{margin-bottom:22px}
.rail-title{font-family:var(--font-mono);font-size:.64rem;font-weight:500;letter-spacing:.15em;
  text-transform:uppercase;color:var(--fg-faint);padding:0 0 8px 2px;
  border-bottom:1px solid var(--rule-soft);margin-bottom:6px}
.rail ul{list-style:none;margin:0;padding:0}
.rail li{display:flex;align-items:flex-start;gap:8px}
.rail a{font-family:var(--font-ui);font-size:.84rem;line-height:1.4;color:var(--fg-muted);
  text-decoration:none;padding:6px 8px;border-radius:4px;flex:1;min-width:0;border-left:2px solid transparent}
.rail a:hover{background:var(--surface-2);color:var(--fg)}
.rail a[aria-current="page"]{color:var(--defend);font-weight:600;border-left-color:var(--defend);
  background:var(--defend-soft)}
.dot{flex-shrink:0;width:14px;height:14px;margin-top:10px;border:1.5px solid var(--rule);
  border-radius:50%;background:var(--bg);position:relative}
.dot.done{background:var(--defend);border-color:var(--defend)}
.dot.done::after{content:"";position:absolute;left:3.5px;top:1px;width:4px;height:7px;
  border:solid var(--on-accent);border-width:0 2px 2px 0;transform:rotate(42deg)}
.rail li.is-done a{color:var(--fg-faint)}

/* ---------- reading column ---------- */
main{padding-left:var(--gut-l);padding-right:var(--gut-r);padding-block:0 90px;min-width:0}
.doc{max-width:72ch;margin:0 auto}
.unit-head{padding-block:40px 20px;border-bottom:2px solid var(--fg);margin-bottom:6px}
.unit-kicker{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--defend);display:block;margin-bottom:9px}
.unit-head h1{font-family:var(--font-ui);font-size:clamp(1.5rem,4vw,2rem);font-weight:600;
  letter-spacing:-.02em;line-height:1.2;margin:0;text-wrap:balance}
.body-wrap{padding-block:26px 0}
h2,h3,h4{font-family:var(--font-ui);letter-spacing:-.012em;text-wrap:balance}
h2{font-size:1.3rem;font-weight:600;margin:34px 0 12px}
h3{font-size:1.04rem;font-weight:600;margin:28px 0 10px}
h4{font-size:.94rem;font-weight:600;margin:22px 0 8px}
p{margin:0 0 15px}
ul,ol{margin:0 0 16px;padding-left:1.3em}
li{margin-bottom:7px}
li::marker{color:var(--fg-faint)}
a{color:var(--defend);text-underline-offset:2px}
hr{border:0;border-top:1px solid var(--rule-soft);margin:26px 0}

/* five-part teaching loop: A observe, B analyze, C defend, D verify, E document */
h3.step{position:relative;padding-left:40px;min-height:30px;display:flex;align-items:center;margin-top:34px}
h3.step::before{content:attr(data-step);position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:28px;height:28px;display:grid;place-items:center;font-family:var(--font-mono);
  font-size:.78rem;font-weight:500;border-radius:50%;border:1.5px solid var(--defend-line);
  background:var(--defend-soft);color:var(--defend)}

.leadnote{font-family:var(--font-ui);font-size:.93rem;background:var(--surface-2);
  border-left:3px solid var(--rule);border-radius:0 4px 4px 0;padding:13px 15px;margin:18px 0}
.leadnote p:last-child{margin-bottom:0}
.leadnote.warn{border-left-color:var(--weak);background:var(--weak-soft)}
.leadnote.warn strong:first-child{color:var(--weak)}
.leadnote.key{border-left-color:var(--defend);background:var(--defend-soft)}
.leadnote.key strong:first-child{color:var(--defend)}
ol.callout-warn{background:var(--weak-soft);border-left:3px solid var(--weak);
  border-radius:0 4px 4px 0;padding:14px 16px 14px 36px;font-family:var(--font-ui);font-size:.93rem}

/* ---------- code ---------- */
.codewrap{position:relative;margin:18px 0}
.codewrap pre{margin:0;background:var(--code-bg);border:1px solid var(--rule);border-radius:5px;
  padding:14px 15px;overflow-x:auto;font-size:.845rem;line-height:1.6}
.codewrap pre code{font-family:var(--font-mono);color:var(--code-fg);background:none;padding:0;font-size:inherit}
.copy-btn{position:absolute;top:7px;right:7px;font-family:var(--font-mono);font-size:.64rem;
  letter-spacing:.06em;text-transform:uppercase;padding:4px 8px;border:1px solid var(--rule);
  border-radius:4px;background:var(--surface);color:var(--fg-faint);cursor:pointer;opacity:0;transition:opacity .15s}
.codewrap:hover .copy-btn,.copy-btn:focus-visible{opacity:1}
.copy-btn.ok{color:var(--defend);border-color:var(--defend-line)}
@media (hover:none){.copy-btn{opacity:1}}
code{font-family:var(--font-mono);font-size:.865em;background:var(--surface-2);
  padding:.12em .34em;border-radius:3px;overflow-wrap:break-word}
.codehilite .k,.codehilite .kd,.codehilite .kn,.codehilite .kc,.codehilite .kr,.codehilite .kt,.codehilite .ow{color:var(--tok-key)}
.codehilite .s,.codehilite .s1,.codehilite .s2,.codehilite .sb,.codehilite .se,.codehilite .sd,.codehilite .si{color:var(--tok-str)}
.codehilite .c,.codehilite .c1,.codehilite .cm,.codehilite .cp,.codehilite .cs{color:var(--tok-com);font-style:italic}
.codehilite .m,.codehilite .mi,.codehilite .mf,.codehilite .mh{color:var(--tok-num)}
.codehilite .nf,.codehilite .nb,.codehilite .nc,.codehilite .nd{color:var(--tok-fn)}
.codehilite .nv,.codehilite .vi,.codehilite .na,.codehilite .err{color:var(--code-fg)}
.codehilite .o,.codehilite .p{color:var(--fg-muted)}

/* ---------- code walkthrough ---------- */
.walk{margin:-8px 0 22px;border:1px solid var(--note-line);border-top:0;
  border-radius:0 0 5px 5px;background:var(--note-soft);overflow:hidden}
.walk summary{font-family:var(--font-ui);font-size:.82rem;font-weight:600;color:var(--note);
  padding:9px 14px;cursor:pointer;list-style:none;display:flex;align-items:center;gap:8px}
.walk summary::-webkit-details-marker{display:none}
.walk summary::before{content:"";width:0;height:0;border-left:5px solid currentColor;
  border-top:4px solid transparent;border-bottom:4px solid transparent;transition:transform .15s;flex-shrink:0}
.walk[open] summary::before{transform:rotate(90deg)}
.walk-in{padding:2px 14px 14px;font-family:var(--font-ui);font-size:.88rem;line-height:1.6}
.walk-sum{margin:0 0 12px;color:var(--fg)}
.walk dl{margin:0;display:grid;grid-template-columns:minmax(0,auto) minmax(0,1fr);gap:7px 14px;align-items:baseline}
.walk dt{font-family:var(--font-mono);font-size:.78rem;color:var(--note);
  background:var(--surface);border:1px solid var(--note-line);border-radius:3px;
  padding:2px 6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.walk dd{margin:0;color:var(--fg-muted)}
@media (max-width:620px){
  .walk dl{grid-template-columns:minmax(0,1fr);gap:3px}
  .walk dt{justify-self:start;margin-top:8px}
}

/* ---------- quiz ---------- */
.quiz{margin:40px 0 0;border:1px solid var(--rule);border-radius:7px;background:var(--surface);overflow:hidden}
.quiz-head{padding:14px 17px;border-bottom:1px solid var(--rule-soft);background:var(--surface-2)}
.quiz-head h2{margin:0;font-size:1rem}
.quiz-head p{margin:5px 0 0;font-family:var(--font-ui);font-size:.85rem;color:var(--fg-muted)}
.quiz-q{padding:17px;border-bottom:1px solid var(--rule-soft)}
.quiz-q:last-child{border-bottom:0}
.quiz-q > p{font-family:var(--font-ui);font-size:.94rem;font-weight:600;margin:0 0 12px}
.quiz-q .qnum{font-family:var(--font-mono);font-size:.72rem;color:var(--fg-faint);
  font-weight:500;margin-right:7px}
.opts{display:flex;flex-direction:column;gap:7px}
.opt{display:flex;align-items:flex-start;gap:10px;font-family:var(--font-ui);font-size:.9rem;
  padding:9px 12px;border:1px solid var(--rule);border-radius:5px;cursor:pointer;background:var(--bg)}
.opt:hover{border-color:var(--fg-faint)}
.opt input{margin:4px 0 0;flex-shrink:0;accent-color:var(--defend)}
.quiz-q.answered .opt{cursor:default;opacity:.62}
.quiz-q.answered .opt.picked{opacity:1}
.quiz-q.answered .opt.right{opacity:1;border-color:var(--defend);background:var(--defend-soft)}
.feedback{margin-top:12px;padding:11px 13px;border-radius:5px;font-family:var(--font-ui);
  font-size:.87rem;line-height:1.55;display:none}
.feedback.show{display:block}
.feedback.correct{background:var(--defend-soft);border-left:3px solid var(--defend);color:var(--fg)}
.feedback.incorrect{background:var(--weak-soft);border-left:3px solid var(--weak);color:var(--fg)}
.fb-label{font-weight:600;display:block;margin-bottom:3px}
.feedback.correct .fb-label{color:var(--defend)}
.feedback.incorrect .fb-label{color:var(--weak)}

/* ---------- completion + nav ---------- */
.status{margin:22px 0 0;padding:14px 16px;border-radius:6px;font-family:var(--font-ui);
  font-size:.9rem;border:1px dashed var(--rule);color:var(--fg-muted);background:var(--surface)}
.status.done{border-style:solid;border-color:var(--defend-line);background:var(--defend-soft);color:var(--fg)}
.status strong{color:var(--defend)}
.pager{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}
.pager a{flex:1 1 200px;min-width:0;display:block;padding:13px 15px;border:1px solid var(--rule);
  border-radius:6px;background:var(--surface);text-decoration:none;color:inherit}
.pager a:hover{border-color:var(--defend-line);background:var(--defend-soft)}
.pager span{display:block;font-family:var(--font-mono);font-size:.66rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--fg-faint);margin-bottom:4px}
.pager b{font-family:var(--font-ui);font-size:.92rem;font-weight:600;
  display:block;overflow:hidden;text-overflow:ellipsis}
.pager .next{text-align:right}

/* ---------- index page ---------- */
.lede{font-family:var(--font-ui);font-size:1.03rem;color:var(--fg-muted);
  max-width:60ch;margin:0 0 26px}
.namebox{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;margin:0 0 30px;
  padding:16px 18px;border:1px solid var(--rule);border-radius:7px;background:var(--surface)}
.field{display:flex;flex-direction:column;gap:5px;flex:1 1 200px;min-width:0}
.field label{font-family:var(--font-ui);font-size:.78rem;font-weight:600;color:var(--fg-muted)}
.field input{font-family:var(--font-ui);font-size:.93rem;padding:9px 11px;border:1px solid var(--rule);
  border-radius:5px;background:var(--bg);color:var(--fg);min-width:0;width:100%}
.field input:focus{outline:2px solid var(--defend);outline-offset:1px;border-color:var(--defend)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:12px;margin:0 0 34px}
.card{display:block;padding:15px 16px;border:1px solid var(--rule);border-radius:7px;
  background:var(--surface);text-decoration:none;color:inherit;min-width:0}
.card:hover{border-color:var(--defend-line);background:var(--defend-soft)}
.card-top{display:flex;align-items:center;gap:9px;margin-bottom:7px}
.card-badge{font-family:var(--font-mono);font-size:.64rem;font-weight:500;letter-spacing:.1em;
  text-transform:uppercase;color:var(--fg-faint);border:1px solid var(--rule);
  border-radius:3px;padding:2px 6px}
.card.is-done .card-badge{color:var(--defend);border-color:var(--defend-line);background:var(--defend-soft)}
.card-state{margin-left:auto;font-family:var(--font-mono);font-size:.64rem;letter-spacing:.08em;
  text-transform:uppercase;color:var(--fg-faint)}
.card.is-done .card-state{color:var(--defend)}
.card h3{font-family:var(--font-ui);font-size:.96rem;font-weight:600;margin:0;line-height:1.35}
.card p{font-family:var(--font-ui);font-size:.85rem;color:var(--fg-muted);margin:6px 0 0;line-height:1.5}
.section-label{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.15em;text-transform:uppercase;
  color:var(--fg-faint);border-bottom:1px solid var(--rule);padding-bottom:8px;margin:0 0 16px}

/* ---------- exam + certificate ---------- */
.gate{padding:18px 20px;border:1px solid var(--weak-line);background:var(--weak-soft);
  border-radius:7px;font-family:var(--font-ui);margin:0 0 26px}
.gate h2{margin:0 0 8px;font-size:1.05rem;color:var(--weak)}
.gate p{font-size:.92rem;margin:0 0 12px}
.gate ul{list-style:none;padding:0;margin:0;display:grid;
  grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:5px}
.gate li{font-size:.85rem;display:flex;gap:8px;align-items:center;margin:0}
.gate li::before{content:"○";color:var(--weak);font-size:.9rem}
.gate li.ok::before{content:"●";color:var(--defend)}
.gate li.ok{color:var(--fg-faint)}
.btn{font-family:var(--font-ui);font-size:.92rem;font-weight:600;padding:11px 20px;
  border:1px solid var(--defend);border-radius:6px;background:var(--defend);color:var(--on-accent);
  cursor:pointer}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:var(--surface);color:var(--defend)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0 0}
.score{margin:24px 0 0;padding:16px 18px;border-radius:7px;border:1px solid var(--rule);
  background:var(--surface);font-family:var(--font-ui);font-size:.98rem}
.score.pass{border-color:var(--defend-line);background:var(--defend-soft)}
.score.fail{border-color:var(--weak-line);background:var(--weak-soft)}
.cert{margin:26px 0 0;padding:34px 30px;border:2px solid var(--defend);border-radius:9px;
  background:var(--surface);text-align:center;font-family:var(--font-ui)}
.cert-kicker{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--defend);margin:0 0 18px}
.cert-name{font-family:var(--font-body);font-size:clamp(1.5rem,5vw,2.1rem);font-weight:600;
  margin:0 0 6px;border-bottom:1px solid var(--rule);padding-bottom:12px;display:inline-block;
  min-width:min(340px,80%);text-wrap:balance}
.cert-for{font-size:.9rem;color:var(--fg-muted);margin:16px 0 0}
.cert-title{font-size:1.05rem;font-weight:600;margin:6px 0 0;text-wrap:balance}
.cert-meta{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;margin:22px 0 0;
  font-family:var(--font-mono);font-size:.72rem;color:var(--fg-muted)}
.cert-note{font-size:.78rem;color:var(--fg-faint);margin:20px 0 0;max-width:46ch;
  margin-inline:auto;line-height:1.5}

/* ---------- mobile ---------- */
.scrim{display:none}
@media (max-width:1023px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .menu-btn{display:inline-grid}
  .rail{position:fixed;top:0;left:0;bottom:0;width:min(318px,86vw);height:auto;z-index:70;
    transform:translateX(-102%);transition:transform .22s ease;
    padding-top:calc(env(safe-area-inset-top,0px) + 18px);
    padding-bottom:calc(env(safe-area-inset-bottom,0px) + 40px)}
  .rail.open{transform:translateX(0)}
  .scrim{display:block;position:fixed;inset:0;background:rgba(8,16,18,.5);z-index:65;
    opacity:0;pointer-events:none;transition:opacity .22s}
  .scrim.on{opacity:1;pointer-events:auto}
  .prog-track{width:54px}
  .brand-mark{display:none}
}
@media (max-width:560px){
  .prog{display:none}
  body{font-size:.97rem}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
:focus-visible{outline:2px solid var(--defend);outline-offset:2px;border-radius:3px}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:var(--gut-l);top:calc(env(safe-area-inset-top,0px) + 8px);z-index:100;
  background:var(--surface);color:var(--fg);font-family:var(--font-ui);font-size:.85rem;
  padding:9px 14px;border:1px solid var(--defend);border-radius:5px}

/* ---------- print ---------- */
@media print{
  .topbar,.rail,.scrim,.copy-btn,.pager,.actions,.namebox{display:none!important}
  .layout{display:block}
  main{padding:0}
  .doc{max-width:none}
  body{background:#fff;color:#000;font-size:10.5pt}
  .walk{break-inside:avoid}
  .walk summary{display:none}
  .walk[open] .walk-in,.walk .walk-in{display:block}
  .cert{border:2px solid #333;break-inside:avoid}
  h2,h3{break-after:avoid}
}