:root{
  --ground:#F5F3F7; --surface:#FFFFFF; --surface-2:#EFEBF2; --surface-3:#E7E1EE;
  --ink:#191320; --ink-2:#443B52; --muted:#6E6580;
  --accent:#7B2D57; --accent-2:#A8467A; --accent-soft:#F2E4EC;
  --ok:#2C6A4B; --ok-soft:#E2F0E8; --bad:#9C2F35; --bad-soft:#F8E4E4;
  --rule:#DFD8E6; --rule-strong:#C6BCD1;
  --code-bg:#EDE8F2; --code-ink:#5A3B55;
  --shadow:0 1px 2px rgba(25,19,32,.05), 0 10px 30px -20px rgba(25,19,32,.4);
  --shadow-lg:0 24px 70px -30px rgba(25,19,32,.55);
  --scrim:rgba(28,22,36,.55); --on-accent:#FFFFFF;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ground:#121017; --surface:#1B1724; --surface-2:#241F30; --surface-3:#2C2639;
    --ink:#EDE8F3; --ink-2:#C4BBD2; --muted:#968CA6;
    --accent:#E38FBB; --accent-2:#C96FA1; --accent-soft:#2E1F2C;
    --ok:#7CC79E; --ok-soft:#1C2B23; --bad:#E88C90; --bad-soft:#2E1D1F;
    --rule:#2E2740; --rule-strong:#453C5C;
    --code-bg:#261F33; --code-ink:#DBAECB;
    --shadow:0 1px 2px rgba(0,0,0,.45), 0 10px 30px -20px rgba(0,0,0,.9);
    --shadow-lg:0 24px 70px -30px rgba(0,0,0,1);
    --scrim:rgba(6,4,10,.72); --on-accent:#1B1724;
  }
}
:root[data-theme="dark"]{
  --ground:#121017; --surface:#1B1724; --surface-2:#241F30; --surface-3:#2C2639;
  --ink:#EDE8F3; --ink-2:#C4BBD2; --muted:#968CA6;
  --accent:#E38FBB; --accent-2:#C96FA1; --accent-soft:#2E1F2C;
  --ok:#7CC79E; --ok-soft:#1C2B23; --bad:#E88C90; --bad-soft:#2E1D1F;
  --rule:#2E2740; --rule-strong:#453C5C;
  --code-bg:#261F33; --code-ink:#DBAECB;
  --shadow:0 1px 2px rgba(0,0,0,.45), 0 10px 30px -20px rgba(0,0,0,.9);
  --shadow-lg:0 24px 70px -30px rgba(0,0,0,1);
  --scrim:rgba(6,4,10,.72); --on-accent:#1B1724;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0; background:var(--ground); color:var(--ink);
  font-family:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  font-size:16px; line-height:1.6; -webkit-font-smoothing:antialiased;
}
body.locked{overflow:hidden;}
code,.mono{font-family:"IBM Plex Mono",ui-monospace,Consolas,monospace;}
code{background:var(--code-bg);color:var(--code-ink);font-size:.86em;padding:.08em .34em;border-radius:3px;}
/* Bloki kodu Pythona w działach V–XI (notatniki JupyterLab). */
pre.py{background:var(--code-bg);color:var(--code-ink);border:1px solid var(--rule);border-radius:3px;
  padding:14px 18px;margin:0 0 18px;overflow-x:auto;font-family:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  font-size:13.5px;line-height:1.6;}
pre.py code{background:none;color:inherit;padding:0;font-size:1em;}
pre.py .kom{color:var(--muted);font-style:italic;}
:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px;border-radius:3px;}
button{font:inherit;color:inherit;cursor:pointer;}

/* ============ HUB ============ */
.masthead{border-bottom:1px solid var(--rule);background:var(--surface);}
.wrap{max-width:1080px;margin:0 auto;padding:0 28px;}
.masthead .wrap{padding-top:50px;padding-bottom:38px;display:flex;flex-direction:column;gap:18px;}
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);font-weight:600;margin:0;}
h1{font-family:"Zilla Slab",Georgia,serif;font-weight:700;font-size:clamp(2rem,4.4vw,3.1rem);line-height:1.07;margin:0;letter-spacing:-.015em;text-wrap:balance;max-width:20ch;}
h1 .thin{color:var(--muted);font-weight:500;}
.lede{margin:0;max-width:64ch;color:var(--ink-2);font-size:1.04rem;}
.facts{display:flex;flex-wrap:wrap;gap:0;border-top:1px solid var(--rule);margin-top:4px;}
.fact{padding:15px 26px 2px 0;margin-right:26px;border-right:1px solid var(--rule);}
.fact:last-child{border-right:0;}
.fact dt{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin:0 0 3px;}
.fact dd{margin:0;font-family:"Zilla Slab",serif;font-weight:600;font-size:1.2rem;font-variant-numeric:tabular-nums;}

main .wrap{padding-top:44px;padding-bottom:96px;}
.sec-title{font-family:"Zilla Slab",serif;font-weight:600;font-size:1.42rem;margin:0 0 4px;letter-spacing:-.01em;}
.sec-sub{margin:0 0 26px;color:var(--muted);font-size:14.6px;max-width:64ch;}

.cards{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));}
.card{
  text-align:left;width:100%;background:var(--surface);border:1px solid var(--rule);
  border-radius:3px;padding:0;overflow:hidden;box-shadow:var(--shadow);
  display:flex;flex-direction:column;transition:border-color .15s, transform .15s;
}
.card:hover{border-color:var(--accent);transform:translateY(-2px);}
.card-open{padding:20px 22px 14px;display:flex;flex-direction:column;gap:9px;flex:1;
  background:transparent;border:0;text-align:left;width:100%;font:inherit;color:inherit;}
.card-no{font-family:"IBM Plex Mono",monospace;font-size:11.5px;font-weight:600;letter-spacing:.1em;color:var(--accent);}
.card h3{font-family:"Zilla Slab",serif;font-weight:600;font-size:1.14rem;margin:0;line-height:1.3;text-wrap:balance;}
.card p{margin:0;font-size:13.8px;color:var(--ink-2);line-height:1.5;}
.card-meta{
  display:flex;gap:14px;flex-wrap:wrap;padding:11px 22px;border-top:1px solid var(--rule);
  background:var(--surface-2);font-family:"IBM Plex Mono",monospace;font-size:11px;
  letter-spacing:.05em;color:var(--muted);align-items:center;
}
.card-meta .mspacer{margin-left:auto;}
.card-meta .go{color:var(--accent);font-weight:600;}
.card-date{font-variant-numeric:tabular-nums;}
.mini{background:transparent;border:1px solid var(--rule-strong);border-radius:2px;padding:3px 9px;
  font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.05em;color:var(--muted);}
.mini:hover{border-color:var(--accent);color:var(--accent);}
.mini.go{border-color:var(--accent);}
.chip{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.04em;padding:2px 9px;
  border-radius:20px;border:1px solid var(--rule-strong);color:var(--muted);white-space:nowrap;}
.chip.wip{border-color:var(--accent-2);color:var(--accent-2);background:var(--accent-soft);}
.chip.done{border-color:var(--ok);color:var(--ok);background:var(--ok-soft);}

/* --- pasek wyboru klasy --- */
.classbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;background:var(--surface);
  border:1px solid var(--rule);border-left:3px solid var(--accent);border-radius:3px;
  padding:13px 18px;margin-bottom:32px;box-shadow:var(--shadow);}
.cb-lab{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);font-weight:600;}
.cb-pills{display:flex;gap:8px;}
.cb-pill{background:var(--surface);border:1px solid var(--rule-strong);border-radius:2px;
  padding:5px 15px;font-family:"Zilla Slab",serif;font-weight:600;font-size:14px;color:var(--ink-2);}
.cb-pill:hover{border-color:var(--accent);}
.cb-pill.on{background:var(--accent);border-color:var(--accent);color:var(--on-accent);}
.cb-sum{margin-left:auto;font-size:13.4px;color:var(--muted);font-variant-numeric:tabular-nums;}

/* --- pasek postępu w prezentacji --- */
.deck-status{flex:none;display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:9px 18px;border-bottom:1px solid var(--rule);background:var(--surface);}
.ds-cls{font-family:"Zilla Slab",serif;font-weight:600;font-size:13.5px;color:var(--accent);
  border:1px solid var(--accent);border-radius:2px;padding:1px 9px;flex:none;}
.ds-info{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--muted);letter-spacing:.03em;}
.deck-status .spacer{margin-left:auto;}

/* --- kopia zapasowa postępów --- */
.backup{margin-top:16px;border:1px solid var(--rule);border-radius:2px;background:var(--surface);}
.backup summary{padding:12px 18px;cursor:pointer;font-family:"IBM Plex Mono",monospace;font-size:10.5px;
  letter-spacing:.13em;text-transform:uppercase;color:var(--muted);font-weight:600;}
.backup summary:hover{color:var(--accent);}
.backup .bk{padding:0 18px 16px;display:flex;flex-direction:column;gap:10px;}
.backup .bk p{margin:0;font-size:13.6px;color:var(--ink-2);max-width:72ch;line-height:1.55;}
.backup textarea{width:100%;min-height:92px;font-family:"IBM Plex Mono",monospace;font-size:11.5px;
  border:1px solid var(--rule);border-radius:2px;padding:9px 11px;background:var(--surface-2);
  color:var(--ink-2);resize:vertical;}
.bk-row{display:flex;gap:9px;flex-wrap:wrap;align-items:center;}
.bk-msg{font-size:12.5px;color:var(--accent);}
.sv{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.06em;text-transform:none;}
.sv.ok{color:var(--ok);}
.sv.warn{color:var(--accent-2);}
.backup code{font-size:11.5px;}

.hub-note{
  margin-top:40px;background:var(--surface);border:1px solid var(--rule);border-left:3px solid var(--accent);
  padding:17px 21px;border-radius:2px;box-shadow:var(--shadow);
}
.hub-note h4{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 7px;font-weight:600;}
.hub-note p{margin:0 0 7px;font-size:14.3px;color:var(--ink-2);max-width:70ch;}
.hub-note p:last-child{margin:0;}
.hub-note kbd{
  font-family:"IBM Plex Mono",monospace;font-size:11px;background:var(--surface-3);
  border:1px solid var(--rule-strong);border-bottom-width:2px;border-radius:3px;padding:1px 5px;
}

/* ============ DECK OVERLAY ============ */
.deck{
  position:fixed;inset:0;z-index:60;background:var(--scrim);
  display:none;padding:26px;
  backdrop-filter:blur(3px);
}
.deck.open{display:flex;align-items:center;justify-content:center;}
.deck-panel{
  background:var(--surface);border:1px solid var(--rule-strong);border-radius:4px;
  box-shadow:var(--shadow-lg);width:min(1020px,100%);height:min(760px,100%);
  display:flex;flex-direction:column;overflow:hidden;position:relative;
}
.deck-bar{height:3px;background:var(--surface-3);flex:none;}
.deck-bar i{display:block;height:100%;background:var(--accent);width:0;transition:width .22s ease;}
.deck-head{
  flex:none;display:flex;align-items:center;gap:14px;padding:13px 18px;
  border-bottom:1px solid var(--rule);background:var(--surface-2);
}
.deck-head .no{font-family:"IBM Plex Mono",monospace;font-size:11.5px;font-weight:600;color:var(--accent);border:1px solid var(--accent);border-radius:2px;padding:2px 6px;flex:none;}
.deck-head h2{font-family:"Zilla Slab",serif;font-size:1rem;font-weight:600;margin:0;line-height:1.25;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.icon-btn{
  flex:none;background:transparent;border:1px solid var(--rule-strong);border-radius:2px;
  padding:5px 10px;font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.06em;color:var(--muted);
}
.icon-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent);}
.icon-btn:disabled{opacity:.4;cursor:not-allowed;}
.deck-head .spacer{margin-left:auto;}

.deck-body{flex:1;overflow-y:auto;padding:38px 46px 46px;position:relative;}
.deck-foot{
  flex:none;display:flex;align-items:center;gap:12px;padding:11px 18px;
  border-top:1px solid var(--rule);background:var(--surface-2);
}
.nav-btn{
  background:var(--surface);border:1px solid var(--rule-strong);border-radius:2px;
  padding:7px 14px;font-size:13.5px;font-weight:500;
}
.nav-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent);}
.nav-btn:disabled{opacity:.38;cursor:not-allowed;}
.nav-btn.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent);}
.counter{
  margin:0 auto;font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--muted);
  font-variant-numeric:tabular-nums;letter-spacing:.05em;
}

/* slide index */
.toc{
  position:absolute;top:0;right:0;bottom:0;width:min(320px,80%);background:var(--surface);
  border-left:1px solid var(--rule);z-index:5;overflow-y:auto;padding:16px 0;display:none;
  box-shadow:-14px 0 40px -30px rgba(0,0,0,.6);
}
.toc.open{display:block;}
.toc h5{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 8px;padding:0 18px;font-weight:600;}
.toc button{
  display:block;width:100%;text-align:left;background:transparent;border:0;
  padding:7px 18px;font-size:13.2px;line-height:1.35;color:var(--ink-2);
  border-left:2px solid transparent;
}
.toc button:hover{background:var(--surface-2);color:var(--accent);}
.toc button.cur{border-left-color:var(--accent);color:var(--accent);font-weight:500;background:var(--accent-soft);}
.toc button .n{font-family:"IBM Plex Mono",monospace;font-size:10.5px;color:var(--muted);margin-right:7px;}

/* ============ SLIDE CONTENT ============ */
.slide{max-width:790px;margin:0 auto;animation:fade .2s ease;}
@keyframes fade{from{opacity:0;transform:translateY(5px);}to{opacity:1;transform:none;}}
@media (prefers-reduced-motion:reduce){.slide{animation:none;} .deck-bar i{transition:none;}}
.slide-kicker{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);font-weight:600;margin:0 0 9px;}
.slide h3{font-family:"Zilla Slab",serif;font-weight:600;font-size:clamp(1.45rem,3vw,1.95rem);line-height:1.18;margin:0 0 20px;letter-spacing:-.014em;text-wrap:balance;}
.slide p{margin:0 0 14px;font-size:16.5px;line-height:1.62;color:var(--ink-2);max-width:70ch;}
.slide p.lead{font-size:17.5px;color:var(--ink);}
.slide ul,.slide ol{margin:0 0 16px;padding:0;list-style:none;display:flex;flex-direction:column;gap:9px;}
.slide ul li{position:relative;padding-left:18px;font-size:16px;line-height:1.55;color:var(--ink-2);max-width:72ch;}
.slide ul li::before{content:"";position:absolute;left:0;top:.66em;width:7px;height:1px;background:var(--accent);}
.slide ol{counter-reset:oi;}
.slide ol li{position:relative;padding-left:30px;font-size:16px;line-height:1.55;color:var(--ink-2);max-width:72ch;counter-increment:oi;}
.slide ol li::before{content:counter(oi);position:absolute;left:0;top:0;font-family:"IBM Plex Mono",monospace;font-size:12px;font-weight:600;color:var(--accent);border:1px solid var(--rule-strong);border-radius:2px;width:20px;height:20px;display:grid;place-items:center;margin-top:2px;}
.slide b,.slide strong{color:var(--ink);font-weight:600;}
.slide h4{font-family:"Zilla Slab",serif;font-size:1.06rem;font-weight:600;margin:22px 0 10px;}

.def{background:var(--accent-soft);border-left:3px solid var(--accent);padding:15px 18px;border-radius:2px;margin:0 0 18px;}
.def p{margin:0;font-size:16px;color:var(--ink);}
.def .lab{font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:600;display:block;margin-bottom:5px;}

.tip{background:var(--surface-2);border:1px solid var(--rule);border-radius:2px;padding:14px 17px;margin:0 0 18px;}
.tip .lab{font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600;display:block;margin-bottom:5px;}
.tip p{margin:0;font-size:15px;}
.tip.exam{border-left:3px solid var(--accent-2);}
.tip.exam .lab{color:var(--accent-2);}

.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:0 0 18px;}
.col{background:var(--surface-2);border:1px solid var(--rule);border-radius:2px;padding:15px 17px;}
.col h5{font-family:"Zilla Slab",serif;font-size:1rem;font-weight:600;margin:0 0 8px;}
.col ul{margin:0;gap:6px;}
.col ul li{font-size:14.6px;}
.col p{font-size:14.6px;margin:0;}

.tbl{overflow-x:auto;margin:0 0 18px;border:1px solid var(--rule);border-radius:2px;}
table{border-collapse:collapse;width:100%;font-size:14.4px;min-width:460px;background:var(--surface);}
th{text-align:left;font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:600;padding:10px 14px;border-bottom:1px solid var(--rule-strong);background:var(--surface-2);}
td{padding:9px 14px;border-bottom:1px solid var(--rule);vertical-align:top;color:var(--ink-2);}
tr:last-child td{border-bottom:0;}
td b{color:var(--ink);}

.stack{display:flex;flex-direction:column;gap:0;margin:0 0 18px;border:1px solid var(--rule);border-radius:2px;overflow:hidden;}
.layer{padding:12px 16px;border-bottom:1px solid var(--rule);background:var(--surface);display:flex;gap:14px;align-items:baseline;}
.layer:last-child{border-bottom:0;}
.layer .lname{font-family:"Zilla Slab",serif;font-weight:600;font-size:15px;min-width:120px;flex:none;}
.layer .ldesc{font-size:14.3px;color:var(--muted);}
.layer.hi{background:var(--accent-soft);}
.layer.hi .lname{color:var(--accent);}

.tl{display:flex;flex-direction:column;gap:0;margin:0 0 18px;border-left:2px solid var(--rule-strong);padding-left:0;}
.tl-item{display:grid;grid-template-columns:74px minmax(0,1fr);gap:14px;padding:9px 0 9px 16px;position:relative;}
.tl-item::before{content:"";position:absolute;left:-5px;top:16px;width:8px;height:8px;border-radius:50%;background:var(--accent);border:2px solid var(--surface);}
.tl-year{font-family:"IBM Plex Mono",monospace;font-size:13px;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums;}
.tl-txt{font-size:15px;color:var(--ink-2);}
.tl-txt b{color:var(--ink);}

.pills{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px;}
.pill{font-family:"IBM Plex Mono",monospace;font-size:12px;border:1px solid var(--rule-strong);border-radius:20px;padding:4px 11px;color:var(--ink-2);background:var(--surface);}
.pill.on{border-color:var(--accent);color:var(--accent);background:var(--accent-soft);}

.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:0 0 18px;}
.metric{background:var(--surface-2);border:1px solid var(--rule);border-radius:2px;padding:14px 16px;}
.metric .v{font-family:"Zilla Slab",serif;font-weight:700;font-size:1.7rem;color:var(--accent);line-height:1.1;font-variant-numeric:tabular-nums;}
.metric .k{font-size:13.4px;color:var(--muted);margin-top:5px;line-height:1.4;}

.quote{border-left:3px solid var(--rule-strong);padding:4px 0 4px 18px;margin:0 0 18px;}
.quote p{font-family:"Zilla Slab",serif;font-size:17px;color:var(--ink);font-style:italic;margin:0 0 6px;}
.quote cite{font-size:13.4px;color:var(--muted);font-style:normal;}

/* ============ QUESTIONS ============ */
.qa{display:flex;flex-direction:column;gap:10px;margin:0 0 8px;}
.qa details{border:1px solid var(--rule);border-radius:2px;background:var(--surface-2);overflow:hidden;}
.qa summary{
  padding:13px 16px;cursor:pointer;font-size:15.4px;font-weight:500;color:var(--ink);
  display:flex;gap:12px;align-items:baseline;list-style:none;
}
.qa summary::-webkit-details-marker{display:none;}
.qa summary::before{content:attr(data-n);font-family:"IBM Plex Mono",monospace;font-size:12px;font-weight:600;color:var(--accent);flex:none;}
.qa summary::after{content:"pokaż odpowiedź";margin-left:auto;font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.08em;color:var(--muted);flex:none;text-transform:uppercase;}
.qa details[open] summary::after{content:"ukryj";}
.qa details[open] summary{border-bottom:1px solid var(--rule);}
.qa .ans{padding:13px 16px 15px 44px;font-size:14.8px;color:var(--ink-2);background:var(--surface);line-height:1.6;}
.qa .ans p{margin:0 0 9px;font-size:14.8px;}
.qa .ans p:last-child{margin:0;}
.qa .ans ul{margin:0;gap:6px;}
.qa .ans ul li{font-size:14.8px;}

.quiz{display:flex;flex-direction:column;gap:18px;}
.q{border:1px solid var(--rule);border-radius:2px;background:var(--surface);overflow:hidden;}
.q-head{padding:14px 17px 11px;display:flex;gap:12px;align-items:baseline;}
.q-head .n{font-family:"IBM Plex Mono",monospace;font-size:12px;font-weight:600;color:var(--accent);flex:none;}
.q-head .txt{font-size:15.6px;font-weight:500;line-height:1.45;}
.q-opts{display:flex;flex-direction:column;padding:0 17px 14px;gap:6px;}
.opt{display:flex;gap:11px;align-items:flex-start;padding:9px 12px;border:1px solid var(--rule);border-radius:2px;cursor:pointer;font-size:14.8px;line-height:1.45;color:var(--ink-2);background:var(--surface);}
.opt:hover{border-color:var(--rule-strong);background:var(--surface-2);}
.opt input{margin:.28em 0 0;accent-color:var(--accent);flex:none;}
.opt .ltr{font-family:"IBM Plex Mono",monospace;font-size:12px;font-weight:600;color:var(--muted);flex:none;margin-top:.05em;}
.q.checked .opt{cursor:default;}
.q.checked .opt.correct{border-color:var(--ok);background:var(--ok-soft);color:var(--ink);}
.q.checked .opt.correct .ltr{color:var(--ok);}
.q.checked .opt.wrong{border-color:var(--bad);background:var(--bad-soft);color:var(--ink);}
.q.checked .opt.wrong .ltr{color:var(--bad);}
.expl{display:none;padding:11px 17px 14px;border-top:1px solid var(--rule);background:var(--surface-2);font-size:14.3px;color:var(--ink-2);line-height:1.55;}
.q.checked .expl{display:block;}
.expl .lab{font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.13em;text-transform:uppercase;font-weight:600;margin-right:8px;}
.expl.good .lab{color:var(--ok);}
.expl.poor .lab{color:var(--bad);}

.quiz-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:20px;padding-top:18px;border-top:1px solid var(--rule);}
.score{
  font-family:"Zilla Slab",serif;font-size:1.05rem;font-weight:600;
}
.score .pct{font-family:"IBM Plex Mono",monospace;font-size:13px;color:var(--muted);margin-left:9px;font-weight:400;}
.score.pass{color:var(--ok);}
.score.fail{color:var(--bad);}

/* --- przelacznik motywu --- */
.top-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.theme-btn{
  flex:none;background:var(--surface);border:1px solid var(--rule-strong);border-radius:2px;
  padding:6px 12px;font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.06em;
  color:var(--muted);display:inline-flex;gap:8px;align-items:center;
}
.theme-btn:hover{border-color:var(--accent);color:var(--accent);}
.theme-btn .ico{font-size:13px;line-height:1;}
a.theme-btn{text-decoration:none;}

/* --- tryb pelnoekranowy --- */
.deck-panel:fullscreen{width:100vw;height:100vh;max-width:none;max-height:none;border:0;border-radius:0;background:var(--surface);}
.deck-panel:fullscreen .deck-body{padding:54px 60px 62px;}
.deck-panel:fullscreen .slide{max-width:940px;}
.deck-panel:fullscreen .slide h3{font-size:clamp(1.7rem,3.1vw,2.4rem);}
.deck-panel:fullscreen .slide p{font-size:18px;}
.deck-panel:fullscreen .slide ul li,.deck-panel:fullscreen .slide ol li{font-size:17.5px;}
.deck-panel:fullscreen table{font-size:15.4px;}
.deck.wide{padding:0;}
.deck.wide .deck-panel{width:100%;height:100%;border:0;border-radius:0;}
.deck.wide .deck-body{padding:46px 54px 56px;}
.deck.wide .slide{max-width:920px;}
.deck.wide .slide h3{font-size:clamp(1.6rem,3vw,2.2rem);}
.deck.wide .slide p{font-size:17.5px;}
.deck.wide .slide ul li,.deck.wide .slide ol li{font-size:17px;}

@media (max-width:620px){ #btn-fs{display:none;} }
@media (max-width:760px){
  .deck{padding:0;}
  .deck-panel{height:100%;width:100%;border:0;border-radius:0;}
  .deck-body{padding:26px 20px 36px;}
  .deck-head h2{font-size:14px;}
  .wrap{padding:0 20px;}
  .layer{flex-direction:column;gap:3px;}
  .layer .lname{min-width:0;}
}

/* ============ PASEK NAWIGACJI ============ */
.sitenav{position:sticky;top:0;z-index:40;background:var(--surface);border-bottom:1px solid var(--rule);}
.sn-wrap{display:flex;align-items:center;gap:3px;min-height:46px;padding-top:6px;padding-bottom:6px;}
.sn-spacer{flex:1 1 auto;}
.sn-root,.sn-step,.sn-cross,.sn-btn{
  flex:none;background:transparent;border:1px solid transparent;border-radius:2px;
  padding:5px 10px;font-family:"IBM Plex Mono",monospace;font-size:11.5px;letter-spacing:.05em;
  color:var(--ink-2);text-decoration:none;display:inline-flex;align-items:center;gap:7px;
  white-space:nowrap;
}
.sn-root:hover,.sn-step:hover,.sn-cross:hover,.sn-btn:hover{border-color:var(--rule-strong);color:var(--accent);}
.sn-root{font-weight:600;}
.sn-ar{font-size:13px;line-height:1;}
/* ukosnik miedzy okruszkami — tylko ozdoba, czytnikom ekranu nic nie mowi */
.sn-sl{flex:none;color:var(--muted);opacity:.55;font-size:13px;line-height:1;}
.sn-cross{border-color:var(--rule);color:var(--muted);margin-left:8px;}
.sn-cross:hover{border-color:var(--accent);}
.sn-step{color:var(--muted);}
.sn-menu{position:relative;flex:none;min-width:0;}
.sn-btn{border-color:var(--rule-strong);color:var(--muted);}
.sn-btn::after{content:"\25BE";font-size:10px;line-height:1;flex:none;}
.sn-btn[aria-expanded="true"]{border-color:var(--accent);color:var(--accent);}
.sn-pop{
  position:absolute;top:calc(100% + 6px);left:0;z-index:50;width:min(420px,calc(100vw - 40px));
  max-height:min(70vh,560px);overflow-y:auto;background:var(--surface);
  border:1px solid var(--rule-strong);border-radius:3px;box-shadow:var(--shadow-lg);padding:6px;
}
/* przelacznik teoria/cwiczenia zostaje widoczny, gdy lista dzialow sie przewija */
.sn-tabs{
  position:sticky;top:-6px;z-index:2;display:flex;gap:4px;background:var(--surface);
  padding:2px 0 8px;margin-bottom:2px;border-bottom:1px solid var(--rule);
}
.sn-tab{
  flex:1 1 0;background:var(--surface-2);border:1px solid var(--rule);border-radius:2px;
  padding:7px 10px;font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;font-weight:600;color:var(--muted);cursor:pointer;
}
.sn-tab:hover{color:var(--accent);border-color:var(--rule-strong);}
.sn-tab.on{background:var(--accent);border-color:var(--accent);color:var(--on-accent);}
.sn-sep{
  font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);padding:10px 10px 5px;
}
.sn-it{
  display:flex;align-items:baseline;gap:10px;padding:7px 10px;border-radius:2px;
  text-decoration:none;color:var(--ink);font-size:14.4px;line-height:1.35;
}
a.sn-it:hover{background:var(--surface-2);color:var(--accent);}
.sn-it.cur{background:var(--accent-soft);color:var(--accent);font-weight:600;}
.sn-it.off{color:var(--muted);opacity:.7;}
.sn-rn{
  flex:none;width:38px;font-family:"IBM Plex Mono",monospace;font-size:11px;font-weight:600;
  letter-spacing:.06em;color:var(--accent);
}
.sn-it.off .sn-rn{color:var(--muted);}
.sn-t{flex:1 1 auto;min-width:0;}
.sn-lab,.sn-kw{
  flex:none;font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--muted);
}
.sn-all{
  display:block;margin-top:4px;padding:10px;border-top:1px solid var(--rule);
  font-family:"IBM Plex Mono",monospace;font-size:11.5px;letter-spacing:.04em;
  color:var(--muted);text-decoration:none;
}
.sn-all:hover{color:var(--accent);}
@media (max-width:860px){
  .sn-step,.sn-cross{display:none;}
}
@media (max-width:640px){
  .sn-wrap{padding-left:16px;padding-right:16px;}
  /* na waskim ekranie okruszek korzenia skraca sie do samego znaku domu */
  .sn-root .sn-long{display:none;}
  .sn-root{padding-left:4px;padding-right:4px;}
  /* menu nie miesci sie obok przycisku — rozciagamy je na szerokosc okna */
  .sn-pop{position:fixed;top:52px;left:12px;right:12px;width:auto;max-height:calc(100vh - 72px);}
}
@media print{ .sitenav{display:none;} }

/* ============ ĆWICZENIA PRAKTYCZNE ============ */
.cw-note{background:var(--surface);border:1px solid var(--rule);border-left:3px solid var(--accent);
  border-radius:3px;padding:16px 20px 18px;margin-bottom:26px;box-shadow:var(--shadow);}
.cw-note h4{margin:0 0 7px;font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);font-weight:600;}
.cw-note p{margin:0 0 9px;font-size:14.6px;color:var(--ink-2);line-height:1.55;}
.cw-note p:last-child{margin-bottom:0;}

.cw-toolbar{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin-bottom:26px;}
.cw-tb-sum{margin-left:auto;font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--muted);
  font-variant-numeric:tabular-nums;}

.cw-temat{margin-bottom:38px;}
.cw-th{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  padding-bottom:9px;margin-bottom:14px;border-bottom:2px solid var(--rule-strong);}
.cw-tno{font-family:"IBM Plex Mono",monospace;font-size:11px;font-weight:600;letter-spacing:.1em;
  color:var(--accent);text-transform:uppercase;}
.cw-th h2{margin:0;font-family:"Zilla Slab",serif;font-weight:600;font-size:1.3rem;
  line-height:1.25;letter-spacing:-.01em;flex:1 1 300px;min-width:0;}
.cw-th-h{font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:var(--muted);
  font-variant-numeric:tabular-nums;}
.cw-teoria{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.05em;
  color:var(--muted);text-decoration:none;border:1px solid var(--rule-strong);border-radius:2px;
  padding:3px 9px;white-space:nowrap;}
.cw-teoria:hover{border-color:var(--accent);color:var(--accent);}

.cw{background:var(--surface);border:1px solid var(--rule);border-radius:3px;
  box-shadow:var(--shadow);margin-bottom:14px;overflow:hidden;}
.cw-head{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;cursor:pointer;
  padding:13px 20px;background:var(--surface-2);border-bottom:1px solid var(--rule);
  list-style:none;}
.cw-head::-webkit-details-marker{display:none;}
.cw:not([open]) .cw-head{border-bottom:0;}
.cw-head:hover .cw-t{color:var(--accent);}
.cw-no{font-family:"IBM Plex Mono",monospace;font-size:11px;font-weight:600;letter-spacing:.08em;
  color:var(--accent);white-space:nowrap;}
.cw-t{font-family:"Zilla Slab",serif;font-weight:600;font-size:1.06rem;line-height:1.3;
  flex:1 1 260px;min-width:0;}
.cw-h{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--muted);
  border:1px solid var(--rule-strong);border-radius:20px;padding:1px 9px;white-space:nowrap;}
.cw-body{padding:16px 20px 18px;}
.cw-cel,.cw-srodowisko,.cw-uwaga,.cw-oddaj{margin:0 0 10px;font-size:14.6px;color:var(--ink-2);
  line-height:1.55;}
.cw-cel b,.cw-srodowisko b,.cw-oddaj b{color:var(--ink);}
.cw-srodowisko{font-size:13.8px;color:var(--muted);}
.cw-uwaga{background:var(--accent-soft);border-left:3px solid var(--accent-2);border-radius:2px;
  padding:9px 13px;font-size:13.8px;}
.cw-oddaj{margin:14px 0 0;padding-top:12px;border-top:1px solid var(--rule);}

.cw-zad{margin:14px 0 0;padding:0 0 0 26px;counter-reset:none;}
.cw-zad li{margin:0 0 11px;padding-left:4px;}
.cw-zad li::marker{font-family:"IBM Plex Mono",monospace;font-size:12px;font-weight:600;color:var(--accent);}
.z-p{display:block;font-size:15px;line-height:1.55;}
.z-e{display:block;margin-top:3px;font-size:13.4px;color:var(--muted);line-height:1.5;}
.z-e b{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--muted);}

@media print{
  .sitenav,.cw-toolbar,.theme-btn,.cw-teoria{display:none;}
  .cw,.cw-note{box-shadow:none;break-inside:avoid;}
  .cw-temat{break-before:auto;}
  .masthead .wrap{padding-top:0;padding-bottom:18px;}
}

/* --- kafel prowadzący do ćwiczeń (strona startowa) --- */
.cwbaner{display:flex;flex-direction:column;gap:7px;background:var(--surface);
  border:1px solid var(--rule);border-left:3px solid var(--accent);border-radius:3px;
  padding:18px 22px 20px;box-shadow:var(--shadow);text-decoration:none;color:inherit;
  transition:border-color .15s,transform .15s;}
.cwbaner:hover{border-color:var(--accent);transform:translateY(-1px);}
.cwb-t{font-family:"Zilla Slab",serif;font-weight:700;font-size:1.28rem;color:var(--accent);}
.cwb-o{font-size:14.4px;color:var(--ink-2);line-height:1.55;max-width:70ch;}
.cwb-go{margin-top:5px;font-family:"IBM Plex Mono",monospace;font-size:11.5px;
  letter-spacing:.06em;color:var(--accent);font-weight:600;}


/* === DEDYKOWANE STYLE DLA KURSU AI === */
.tip.teacher {
  border-left: 4px solid #8b5cf6 !important;
  background: rgba(139, 92, 246, 0.09) !important;
  border-radius: 4px;
  padding: 16px 20px;
  margin: 18px 0;
}
.tip.teacher .lab {
  color: #8b5cf6 !important;
  font-weight: 700 !important;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 6px;
}
.tip.teacher p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
}
.tip.teacher p:last-child {
  margin-bottom: 0;
}
.tip.teacher ul {
  margin: 6px 0 0 18px;
  padding: 0;
}
.tip.teacher li {
  margin-bottom: 4px;
  font-size: 14.5px;
}

.tip.step {
  border-left: 4px solid #06b6d4 !important;
  background: rgba(6, 182, 212, 0.08) !important;
  border-radius: 4px;
}
.tip.step .lab {
  color: #06b6d4 !important;
  font-weight: 700;
}

.tip.warn {
  border-left: 4px solid #f59e0b !important;
  background: rgba(245, 158, 11, 0.08) !important;
}
.tip.warn .lab {
  color: #f59e0b !important;
  font-weight: 700;
}