/* ===========================================================================
   IT Akademia — style. Ciemny/jasny motyw, responsywny (laptop/tablet/telefon).
   =========================================================================== */
:root{
  --bg:#0b1220; --bg2:#111a2e; --card:#141f38; --card2:#1a2745;
  --line:#243456; --text:#e8eefc; --muted:#93a3c9; --faint:#63739c;
  --brand:#5b8cff; --brand2:#7aa2ff; --accent:#22d3aa; --warn:#f5b23d;
  --bad:#ef5f6b; --good:#33d17a; --key:#c084fc;
  --grad:linear-gradient(135deg,#5b8cff,#22d3aa);
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --r:16px; --r2:12px;
}
html[data-theme="light"]{
  --bg:#eef2fb; --bg2:#e4ebf8; --card:#ffffff; --card2:#f4f7ff;
  --line:#d8e0f2; --text:#132038; --muted:#5a6a8c; --faint:#8494b6;
  --shadow:0 10px 28px rgba(30,50,100,.12);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:radial-gradient(1200px 700px at 80% -10%,rgba(91,140,255,.14),transparent 60%),
             radial-gradient(900px 600px at -10% 10%,rgba(34,211,170,.10),transparent 55%),
             var(--bg);
  color:var(--text);
  font-family:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.62; min-height:100vh; -webkit-font-smoothing:antialiased;
}
a{color:var(--brand2);text-decoration:none}
h1,h2,h3{line-height:1.25;margin:.2em 0 .5em}

/* ------------------------------- TOPBAR ---------------------------------- */
.topbar{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:14px;
  padding:10px 18px;background:rgba(11,18,32,.82);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line)}
html[data-theme="light"] .topbar{background:rgba(255,255,255,.82)}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;color:var(--text);font-size:18px}
.brand-logo{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;
  background:var(--grad);color:#04122e;font-size:15px;box-shadow:var(--shadow)}
.topnav{display:flex;gap:6px;margin-left:8px}
.topnav a{padding:7px 14px;border-radius:10px;color:var(--muted);font-weight:600;font-size:14px}
.topnav a:hover{background:var(--card);color:var(--text)}
.topnav a.on{background:var(--card2);color:var(--text)}
.theme-btn{margin-left:auto;width:38px;height:38px;border-radius:11px;border:1px solid var(--line);
  background:var(--card);color:var(--text);cursor:pointer;font-size:16px}
.theme-btn:hover{background:var(--card2)}

.wrap{max-width:1080px;margin:0 auto;padding:24px 18px 80px}
.foot{text-align:center;color:var(--faint);font-size:13px;padding:24px}

/* ------------------------------- KARTY ----------------------------------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:20px;box-shadow:var(--shadow)}
.hero{background:linear-gradient(135deg,var(--card),var(--card2));border:1px solid var(--line);
  border-radius:22px;padding:26px 26px;box-shadow:var(--shadow);margin-bottom:22px}
.hero h1{font-size:clamp(24px,4vw,34px);margin:0 0 6px}
.hero p{color:var(--muted);margin:0;max-width:60ch}
.stat-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.pill{display:flex;align-items:center;gap:8px;background:var(--bg2);border:1px solid var(--line);
  border-radius:999px;padding:7px 14px;font-size:13px;color:var(--muted)}
.pill b{color:var(--text);font-size:15px}
.pill.streak{background:linear-gradient(135deg,rgba(245,178,61,.18),rgba(239,95,107,.10));border-color:#5a4a2a}

/* --------------------------- PASEK POSTEPU -------------------------------- */
.bar{height:10px;border-radius:999px;background:var(--bg2);overflow:hidden;border:1px solid var(--line)}
.bar>i{display:block;height:100%;border-radius:999px;background:var(--grad);
  transition:width .5s cubic-bezier(.2,.8,.2,1)}
.bar.lg{height:14px}
.bar-row{display:flex;align-items:center;gap:12px}
.bar-row .bar{flex:1}
.bar-pct{font-weight:800;font-size:14px;min-width:44px;text-align:right}

/* ----------------------------- MODULE GRID ------------------------------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.mod{position:relative;display:flex;flex-direction:column;gap:12px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r);padding:18px;box-shadow:var(--shadow);
  transition:transform .15s,border-color .15s}
.mod:hover{transform:translateY(-3px);border-color:var(--brand)}
.mod-next{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent),var(--shadow)}
.next-flag{position:absolute;top:-11px;right:14px;background:var(--accent);color:#04231c;
  font-size:11px;font-weight:800;padding:3px 10px;border-radius:999px;letter-spacing:.02em;
  box-shadow:0 4px 12px rgba(0,0,0,.3)}

/* ------------------------------ WARSTWY ---------------------------------- */
.layer{margin:0 0 30px;padding:18px 18px 20px;background:linear-gradient(180deg,var(--card2),transparent 70%);
  border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:var(--r)}
.layer-done{border-left-color:var(--good)}
.layer-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.layer-num{flex:none;width:36px;height:36px;display:grid;place-items:center;border-radius:11px;
  background:var(--grad);color:#04122e;font-weight:900;font-size:17px;box-shadow:var(--shadow)}
.layer-done .layer-num{background:var(--good);color:#04220f}
.layer-ic{font-size:26px;line-height:1}
.layer-tt{flex:1;min-width:180px}
.layer-tt h2{margin:0;font-size:20px;line-height:1.2}
.layer-sub{color:var(--muted);font-size:13px;font-weight:600}
.layer-prog{display:flex;align-items:center;gap:10px;min-width:150px;flex:none}
.layer-prog .bar{width:110px}
.layer-goal{color:var(--muted);font-size:14px;margin:12px 2px 16px;max-width:80ch}
.mod-head{display:flex;align-items:center;gap:12px}
.mod-ic{font-size:30px;width:52px;height:52px;display:grid;place-items:center;border-radius:14px;
  background:var(--bg2);border:1px solid var(--line)}
.mod-title{font-weight:800;font-size:17px;margin:0}
.mod-level{font-size:12px;color:var(--faint);font-weight:600}
.mod-desc{color:var(--muted);font-size:14px;margin:0;flex:1}
.mod-foot{display:flex;align-items:center;justify-content:space-between;gap:10px}
.badge{font-size:12px;color:var(--muted);background:var(--bg2);border:1px solid var(--line);
  padding:3px 10px;border-radius:999px;font-weight:600}
.badge.done{color:#04220f;background:var(--good);border-color:transparent}

/* ------------------------------ PRZYCISKI -------------------------------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 18px;border-radius:12px;
  border:1px solid var(--line);background:var(--card2);color:var(--text);font-weight:700;
  cursor:pointer;font-size:14px;transition:filter .15s,transform .05s}
.btn:hover{filter:brightness(1.12)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--grad);color:#04122e;border-color:transparent}
.btn.ghost{background:transparent}
.btn.sm{padding:8px 12px;font-size:13px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ------------------------------ MODUL VIEW ------------------------------- */
.crumbs{color:var(--faint);font-size:13px;margin-bottom:12px}
.crumbs a{color:var(--muted)}
.lesson-list{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.lrow{display:flex;align-items:center;gap:14px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r2);padding:14px 16px;box-shadow:var(--shadow);
  transition:border-color .15s,transform .1s}
.lrow:hover{border-color:var(--brand);transform:translateX(3px)}
.lrow .num{width:34px;height:34px;flex:none;border-radius:10px;display:grid;place-items:center;
  font-weight:800;background:var(--bg2);border:1px solid var(--line);color:var(--muted)}
.lrow.done .num{background:var(--good);color:#04220f;border-color:transparent}
.lrow .meta{flex:1;min-width:0}
.lrow .ltitle{font-weight:700;font-size:15px}
.lrow .lsum{color:var(--muted);font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lrow .ltags{display:flex;gap:6px;align-items:center;color:var(--faint);font-size:12px;flex:none}
.diff{display:inline-flex;gap:2px}
.diff i{width:6px;height:6px;border-radius:50%;background:var(--line);display:inline-block}
.diff i.on{background:var(--brand)}
.rec{font-size:11px;color:#04122e;background:var(--accent);padding:2px 8px;border-radius:999px;font-weight:800}

/* ------------------------------ LEKCJA ----------------------------------- */
.lesson-top{position:sticky;top:56px;z-index:20;background:var(--bg);padding:10px 0 14px;margin-bottom:6px}
html[data-theme="light"] .lesson-top{background:var(--bg)}
.lesson-h1{font-size:clamp(22px,3.4vw,30px);margin:6px 0 4px}
.obj{background:var(--card2);border:1px solid var(--line);border-left:4px solid var(--brand);
  border-radius:12px;padding:14px 18px;margin:18px 0}
.obj b{display:block;margin-bottom:6px;color:var(--brand2)}
.obj ul{margin:0;padding-left:20px;color:var(--muted)}

/* --------------------- WPROWADZENIE HISTORYCZNE -------------------------- */
.lesson-intro{position:relative;margin:18px 0 20px;padding:18px 20px 6px;
  background:linear-gradient(180deg,rgba(192,132,252,.10),transparent 78%);
  border:1px solid var(--line);border-left:4px solid var(--key);border-radius:14px}
.li-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.li-ic{font-size:20px;line-height:1}
.li-kicker{font-weight:800;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--key)}
.li-era{margin-left:auto;font-size:12px;font-weight:700;color:var(--muted);
  background:var(--bg2);border:1px solid var(--line);border-radius:999px;padding:2px 11px}
.lesson-intro p{color:var(--text);margin:0 0 12px}
.lesson-intro p:first-of-type{font-size:1.03em}

.reading{font-size:16.5px}
.reading h2{font-size:22px;margin-top:34px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.reading h2 .sub{display:block;font-size:13px;color:var(--faint);font-weight:600;margin-top:2px}
.reading p{margin:14px 0}
.reading .lead{font-size:18px;color:var(--text);background:var(--card2);border-radius:12px;
  padding:16px 18px;border:1px solid var(--line)}
.reading code{background:var(--bg2);padding:2px 7px;border-radius:6px;font-size:.9em;
  border:1px solid var(--line);color:var(--brand2)}
.reading pre{background:#0a1120;border:1px solid var(--line);border-radius:12px;padding:16px;
  overflow:auto;font-size:14px;color:#cfe0ff}
html[data-theme="light"] .reading pre{background:#0f1830;color:#cfe0ff}
.reading ul,.reading ol{margin:14px 0;padding-left:24px}
.reading li{margin:7px 0}
.reading table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden}
.reading th{background:var(--card2);text-align:left;padding:11px 13px;font-weight:700;border-bottom:1px solid var(--line)}
.reading td{padding:10px 13px;border-bottom:1px solid var(--line);color:var(--muted)}
.reading tr:last-child td{border-bottom:none}
.reading td:first-child{color:var(--text);font-weight:600}

.note{margin:18px 0;padding:14px 16px 14px 46px;border-radius:12px;position:relative;
  border:1px solid var(--line);background:var(--card2);font-size:15px}
.note::before{position:absolute;left:14px;top:13px;font-size:18px}
.note.info::before{content:"ℹ️"}
.note.tip{border-color:#1f5a4a}.note.tip::before{content:"💡"}
.note.warn{border-color:#5a4a2a;background:rgba(245,178,61,.08)}.note.warn::before{content:"⚠️"}
.note.key{border-color:#4a3a6a;background:rgba(192,132,252,.09)}.note.key::before{content:"🔑"}
.note.pro{border-color:#245}.note.pro::before{content:"🛠️"}
.analogy{margin:18px 0;padding:14px 16px 14px 46px;border-radius:12px;position:relative;
  border:1px dashed var(--line);background:transparent;font-style:italic;color:var(--muted)}
.analogy::before{content:"🧭";position:absolute;left:14px;top:13px;font-size:18px}

/* ---------------------------- CWICZENIA ---------------------------------- */
.ex-wrap{margin:26px 0}
.ex-title{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px;margin-bottom:6px}
.ex-kind{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.05em;
  color:#04122e;background:var(--accent);padding:3px 9px;border-radius:999px}
.ex{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;
  box-shadow:var(--shadow)}
.ex-prompt{font-weight:600;margin-bottom:14px}
.ex-actions{display:flex;gap:10px;align-items:center;margin-top:16px;flex-wrap:wrap}
.ex-feedback{margin-top:14px;padding:12px 14px;border-radius:12px;font-size:14.5px;display:none}
.ex-feedback.ok{display:block;background:rgba(51,209,122,.12);border:1px solid #1f5a3a;color:var(--good)}
.ex-feedback.no{display:block;background:rgba(239,95,107,.12);border:1px solid #5a2a30;color:var(--bad)}
.ex-hint{color:var(--faint);font-size:13px}

/* order (ukladanie krokow) */
.order-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.order-item{display:flex;align-items:center;gap:12px;background:var(--card2);border:1px solid var(--line);
  border-radius:11px;padding:12px 14px;cursor:grab;user-select:none;transition:box-shadow .12s,border-color .12s}
.order-item:active{cursor:grabbing}
.order-item.drag{opacity:.4}
.order-item.over{border-color:var(--brand);box-shadow:0 0 0 2px rgba(91,140,255,.35)}
.order-item .grip{color:var(--faint);font-size:18px;flex:none}
.order-item .oidx{width:26px;height:26px;flex:none;border-radius:8px;background:var(--bg2);
  display:grid;place-items:center;font-weight:800;font-size:13px;color:var(--muted)}
.order-item.correct{border-color:var(--good)}
.order-item.wrong{border-color:var(--bad)}

/* network builder (SVG) */
.net-canvas{position:relative;width:100%;aspect-ratio:16/8;background:
  radial-gradient(circle at 50% 50%,rgba(91,140,255,.06),transparent 70%),var(--bg2);
  border:1px solid var(--line);border-radius:14px;overflow:hidden}
.net-svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.net-node{position:absolute;transform:translate(-50%,-50%);display:flex;flex-direction:column;
  align-items:center;gap:5px;cursor:pointer;user-select:none;z-index:2}
.net-node .nb{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;font-size:26px;
  background:var(--card);border:2px solid var(--line);box-shadow:var(--shadow);transition:border-color .12s,transform .1s}
.net-node:hover .nb{border-color:var(--brand2);transform:scale(1.05)}
.net-node.sel .nb{border-color:var(--accent);box-shadow:0 0 0 3px rgba(34,211,170,.35)}
.net-node .nl{font-size:12px;font-weight:700;color:var(--muted);text-align:center;max-width:90px}
.net-help{color:var(--faint);font-size:13px;margin-top:10px}

/* diagram (strefy upuszczania) */
.dia-wrap{display:flex;flex-direction:column;gap:14px}
.dia-canvas{position:relative;width:100%;aspect-ratio:3/2.4;background:
  linear-gradient(0deg,rgba(91,140,255,.05),transparent),var(--bg2);
  border:1px solid var(--line);border-radius:14px;overflow:hidden}
.dia-canvas svg{position:absolute;inset:0;width:100%;height:100%}
.dia-zone{position:absolute;border:2px dashed var(--line);border-radius:11px;display:grid;place-items:center;
  text-align:center;font-size:13px;color:var(--faint);background:rgba(255,255,255,.02);padding:4px;transition:border-color .12s,background .12s}
.dia-zone.over{border-color:var(--brand);background:rgba(91,140,255,.12)}
.dia-zone.filled{border-style:solid;border-color:var(--brand2);color:var(--text);font-weight:700;
  background:var(--card)}
.dia-zone.correct{border-color:var(--good);background:rgba(51,209,122,.14)}
.dia-zone.wrong{border-color:var(--bad);background:rgba(239,95,107,.12)}
.dia-tray{display:flex;flex-wrap:wrap;gap:8px;padding:12px;background:var(--bg2);border:1px solid var(--line);border-radius:12px;min-height:56px}
.chip{padding:9px 14px;border-radius:10px;background:var(--card);border:1px solid var(--line);
  font-weight:700;font-size:14px;cursor:grab;user-select:none;box-shadow:var(--shadow)}
.chip:active{cursor:grabbing}
.chip.dragging{opacity:.5}
.chip.used{display:none}

/* panel (symulacja konsoli) */
.panel-sim{background:linear-gradient(180deg,var(--card2),var(--card));border:1px solid var(--line);
  border-radius:14px;overflow:hidden}
.panel-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--bg2);border-bottom:1px solid var(--line);
  font-size:13px;color:var(--muted);font-weight:600}
.panel-bar .dot{width:10px;height:10px;border-radius:50%;background:var(--line)}
.panel-body{padding:16px}
.pfield{display:flex;flex-direction:column;gap:6px;padding:12px 0;border-bottom:1px solid var(--line)}
.pfield:last-child{border-bottom:none}
.pfield label{font-weight:700;font-size:14px}
.pfield .phelp{font-size:12.5px;color:var(--faint)}
.pfield select{background:var(--bg2);color:var(--text);border:1px solid var(--line);border-radius:10px;
  padding:10px 12px;font-size:14px;font-family:inherit}
.pfield select:focus{outline:none;border-color:var(--brand)}
.toggle{display:inline-flex;gap:6px}
.toggle button{padding:9px 16px;border:1px solid var(--line);background:var(--bg2);color:var(--muted);
  cursor:pointer;font-weight:700;font-size:13px}
.toggle button:first-child{border-radius:10px 0 0 10px}
.toggle button:last-child{border-radius:0 10px 10px 0}
.toggle button.on{background:var(--grad);color:#04122e;border-color:transparent}
.pfield.ok select,.pfield.ok .toggle button.on{border-color:var(--good)}
.pfield.bad select,.pfield.bad .toggle button.on{border-color:var(--bad)}

/* match (dopasowanie kolumny) */
.match{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.match-col{display:flex;flex-direction:column;gap:8px}
.mitem{padding:12px 14px;border-radius:11px;background:var(--card2);border:1px solid var(--line);
  cursor:pointer;font-size:14px;font-weight:600;transition:border-color .12s}
.mitem:hover{border-color:var(--brand2)}
.mitem.sel{border-color:var(--accent);box-shadow:0 0 0 2px rgba(34,211,170,.3)}
.mitem.matched{opacity:.55;cursor:default}
.mitem.correct{border-color:var(--good)}
.mitem.wrong{border-color:var(--bad)}
.mitem .mtag{font-size:11px;color:var(--faint);font-weight:800;margin-right:6px}

/* quiz */
.quiz-opts{display:flex;flex-direction:column;gap:9px}
.qopt{text-align:left;padding:13px 15px;border-radius:11px;background:var(--card2);border:1px solid var(--line);
  color:var(--text);cursor:pointer;font-size:14.5px;font-weight:600;transition:border-color .12s}
.qopt:hover{border-color:var(--brand2)}
.qopt.sel{border-color:var(--brand)}
.qopt.correct{border-color:var(--good);background:rgba(51,209,122,.12)}
.qopt.wrong{border-color:var(--bad);background:rgba(239,95,107,.12)}

/* nav lekcji */
.lesson-nav{display:flex;justify-content:space-between;gap:12px;margin-top:36px;padding-top:20px;
  border-top:1px solid var(--line)}
.complete-box{position:sticky;bottom:12px;margin-top:30px;background:var(--card);border:1px solid var(--line);
  border-radius:16px;padding:16px 18px;box-shadow:var(--shadow);display:flex;align-items:center;
  justify-content:space-between;gap:14px;flex-wrap:wrap}

/* =========================== FISZKI (mobile) ============================= */
.fc-head{text-align:center;margin-bottom:14px}
.fc-mods{display:flex;gap:8px;overflow-x:auto;padding:6px 2px 12px;-webkit-overflow-scrolling:touch}
.fc-mods a{flex:none;padding:8px 14px;border-radius:999px;border:1px solid var(--line);
  background:var(--card);color:var(--muted);font-weight:700;font-size:13px;white-space:nowrap}
.fc-mods a.on{background:var(--grad);color:#04122e;border-color:transparent}
.fc-stage{perspective:1400px;margin:14px auto;max-width:520px}
.fcard{position:relative;width:100%;aspect-ratio:3/2.05;transform-style:preserve-3d;
  transition:transform .5s cubic-bezier(.2,.7,.2,1);cursor:pointer}
.fcard.flip{transform:rotateY(180deg)}
.fface{position:absolute;inset:0;backface-visibility:hidden;border-radius:20px;padding:26px;
  display:flex;flex-direction:column;justify-content:center;text-align:center;
  border:1px solid var(--line);box-shadow:var(--shadow)}
.fface.front{background:linear-gradient(150deg,var(--card2),var(--card))}
.fface.back{background:linear-gradient(150deg,#123047,var(--card));transform:rotateY(180deg)}
.fc-tag{position:absolute;top:14px;left:16px;font-size:11px;font-weight:800;color:var(--faint);
  text-transform:uppercase;letter-spacing:.05em}
.fc-box{position:absolute;top:14px;right:16px;font-size:11px;font-weight:800;color:var(--faint)}
.fc-mod{font-size:12px;color:var(--brand2);font-weight:700;margin-bottom:8px}
.fc-front-txt{font-size:clamp(19px,4.6vw,26px);font-weight:800}
.fc-back-txt{font-size:clamp(15px,3.6vw,19px);color:var(--text)}
.fc-hint{color:var(--faint);font-size:12px;margin-top:14px}
.fc-controls{display:flex;gap:12px;justify-content:center;margin-top:18px}
.fc-controls .btn{min-width:130px;justify-content:center}
.fc-progress{max-width:520px;margin:10px auto 0}
.fc-count{text-align:center;color:var(--muted);font-size:13px;margin-top:8px}
.fc-done{text-align:center;padding:40px 20px}
.fc-done .big{font-size:52px}

/* --------------------------- PRZEJSCIA / ANIMACJE ------------------------ */
.page-in{animation:pageIn .45s ease both}
@keyframes pageIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s cubic-bezier(.2,.8,.2,1)}
.reveal.seen{opacity:1;transform:none}
@keyframes pop{0%{transform:scale(1)}40%{transform:scale(1.03)}100%{transform:scale(1)}}
@keyframes shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-7px)}40%{transform:translateX(7px)}60%{transform:translateX(-5px)}80%{transform:translateX(5px)}}
.ex.correct-anim{animation:pop .45s ease}
.ex.wrong-anim{animation:shake .4s ease}
.ex.correct-anim{box-shadow:0 0 0 2px var(--good),var(--shadow)}
.ex-feedback.ok,.ex-feedback.no{animation:fbIn .3s ease both}
@keyframes fbIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.btn,.qopt,.mitem,.order-item,.chip,.net-node .nb,.dia-zone,.mod,.lrow{transition:all .18s cubic-bezier(.2,.8,.2,1)}
.fcard{will-change:transform}
@media (prefers-reduced-motion:reduce){
  .page-in,.reveal,.ex.correct-anim,.ex.wrong-anim,.ex-feedback.ok,.ex-feedback.no{animation:none!important}
  .reveal{opacity:1;transform:none}
}

/* --------------------------- RESPONSYWNOSC ------------------------------- */
@media (max-width:720px){
  .wrap{padding:16px 12px 90px}
  .hero{padding:20px}
  .grid{grid-template-columns:1fr}
  .reading{font-size:16px}
  .lesson-top{top:52px}
  .match{grid-template-columns:1fr}
  .net-canvas{aspect-ratio:1/1}
  .lrow .lsum{display:none}
  .brand-name{display:none}
  .lesson-nav .btn{flex:1;justify-content:center}
  .layer-prog{width:100%;min-width:0}
  .layer-prog .bar{width:auto;flex:1}
}
@media (max-width:420px){
  .net-node .nb{width:46px;height:46px;font-size:20px}
  .fc-controls .btn{min-width:0;flex:1}
}

/* --------------------------- ZRZUTY / ZDJECIA / PODSUMOWANIA ------------- */
/* "Zrzut ekranu" prawdziwego systemu — SVG mockup w ramce okna */
.shot{margin:26px 0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  background:var(--bg2);box-shadow:0 8px 30px rgba(0,0,0,.28)}
.shot-bar{display:flex;align-items:center;gap:10px;padding:9px 14px;background:var(--card2);
  border-bottom:1px solid var(--line)}
.shot-dots{display:inline-flex;gap:6px}
.shot-dots i{width:11px;height:11px;border-radius:50%;background:#ff5f57}
.shot-dots i:nth-child(2){background:#febc2e}
.shot-dots i:nth-child(3){background:#28c840}
.shot-title{font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.2px}
.shot-canvas{background:#0d1524;padding:0;line-height:0}
.shot-canvas svg{width:100%;height:auto;display:block}
.shot figcaption{padding:10px 14px;font-size:13px;color:var(--muted);
  border-top:1px solid var(--line);line-height:1.5}

/* Ilustracja sprzetu (SVG) jak zdjecie pogladowe */
.photo{margin:26px 0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--card)}
.photo-canvas{background:radial-gradient(120% 120% at 50% 0%,var(--card2),var(--bg2));
  padding:22px;line-height:0;text-align:center}
.photo-canvas svg{max-width:100%;height:auto;display:inline-block}
.photo figcaption,.imgfig figcaption{padding:11px 14px;font-size:13px;color:var(--muted);
  border-top:1px solid var(--line);line-height:1.5}
.photo-tag{display:inline-block;background:var(--card2);border:1px solid var(--line);
  color:var(--faint);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;
  padding:2px 8px;border-radius:999px;margin-right:8px}

/* Prawdziwe zdjecie/zrzut z internetu (URL) z fallbackiem */
.imgfig{margin:26px 0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--card)}
.imgfig-canvas{position:relative;background:var(--bg2);min-height:120px;
  display:flex;align-items:center;justify-content:center}
.imgfig-canvas img{max-width:100%;height:auto;display:block}
.imgfig-fallback{display:none;flex-direction:column;gap:4px;align-items:center;
  padding:34px 18px;color:var(--muted);font-size:15px;text-align:center}
.imgfig-fallback small{color:var(--faint);font-size:12px}
.imgfig.broken .imgfig-canvas img{display:none}
.imgfig.broken .imgfig-fallback{display:flex}
.credit{color:var(--faint);font-style:italic}

/* Karta podsumowania sekcji/lekcji */
.summary-card{margin:26px 0;background:linear-gradient(180deg,var(--card2),var(--card));
  border:1px solid var(--line);border-left:4px solid var(--good);border-radius:var(--r2);padding:16px 18px}
.summary-h{font-weight:800;font-size:16px;margin-bottom:10px;color:var(--text)}
.summary-card ul{margin:0;padding-left:20px}
.summary-card li{margin:6px 0;color:var(--muted);line-height:1.55}
.summary-card li::marker{color:var(--good)}

/* Checkpoint / mostek powtorkowy w toku */
.checkpoint{margin:22px 0;padding:12px 16px;border-radius:var(--r2);
  background:rgba(192,132,252,.08);border:1px solid rgba(192,132,252,.32);
  color:var(--text);font-size:15px;line-height:1.55}
.checkpoint.review{border-color:rgba(192,132,252,.32)}
.checkpoint.recall{border-color:rgba(34,211,170,.32);background:rgba(34,211,170,.07)}
.checkpoint.bridge{border-color:rgba(91,140,255,.32);background:rgba(91,140,255,.07)}

/* Cwiczenie osadzone w toku czytania (interleaving) */
.inline-ex{margin:26px 0;position:relative}
.inline-ex .ex{border-left:4px solid var(--accent)}
.inline-ex .ex-title .ex-kind{background:var(--accent);color:#04231c}

/* Panel jezykow programowania — drabinka trudnosci (latwe -> skomplikowane) */
.langpanel{margin:28px 0;border:1px solid var(--line);border-radius:var(--r2);
  overflow:hidden;background:var(--card)}
.lp-head{font-weight:800;font-size:16px;padding:14px 18px;color:var(--text);
  background:linear-gradient(180deg,var(--card2),var(--card));border-bottom:1px solid var(--line)}
.lp-ic{margin-right:6px}
.lp-row{display:grid;grid-template-columns:1fr auto;gap:6px 14px;align-items:center;
  padding:14px 18px;border-bottom:1px solid var(--line);border-left:4px solid var(--faint)}
.lp-row:last-child{border-bottom:none}
.lp-main{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.lp-emoji{font-size:20px}
.lp-name{font-weight:800;font-size:16px;color:var(--text)}
.lp-tag{font-size:11px;font-weight:700;letter-spacing:.03em;text-transform:uppercase;
  padding:2px 8px;border-radius:999px;background:var(--bg2);color:var(--muted);border:1px solid var(--line)}
.lp-meter{display:flex;gap:4px;align-items:center}
.lp-meter i{width:10px;height:10px;border-radius:50%;background:var(--bg2);border:1px solid var(--line)}
.lp-meter i.on{background:var(--accent);border-color:var(--accent)}
.lp-why{grid-column:1/-1;color:var(--muted);font-size:14.5px;line-height:1.55}
.lp-sample{grid-column:1/-1;margin:6px 0 0;background:var(--bg2);border:1px solid var(--line);
  border-radius:8px;padding:10px 12px;overflow-x:auto;font-size:13px;line-height:1.5}
.lp-sample code{color:var(--text)}
/* Kolor lewej krawedzi wg poziomu: zielony (latwy) -> czerwony (trudny) */
.lp-l1{border-left-color:#22c55e}
.lp-l2{border-left-color:#84cc16}
.lp-l3{border-left-color:#eab308}
.lp-l4{border-left-color:#f97316}
.lp-l5{border-left-color:#ef4444}
.lp-l1 .lp-meter i.on{background:#22c55e;border-color:#22c55e}
.lp-l2 .lp-meter i.on{background:#84cc16;border-color:#84cc16}
.lp-l3 .lp-meter i.on{background:#eab308;border-color:#eab308}
.lp-l4 .lp-meter i.on{background:#f97316;border-color:#f97316}
.lp-l5 .lp-meter i.on{background:#ef4444;border-color:#ef4444}