/* =========================================================
   Genetică moleculară — sistem de design
   ========================================================= */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&family=Caveat:wght@500;700&display=swap');

:root{
  --bg:#f2f4fb; --bg2:#e8ecf8; --card:#ffffff; --card2:#f8f9fe; --ink:#162033; --muted:#58647c; --line:#e1e6f2;
  --brand:#5b4bf5; --brand2:#8b5cf6; --brand-soft:#eeeefe; --on-brand:#ffffff;
  --accent:#5b4bf5; --accent-soft:#eeeefe;
  --ok:#15a34a; --ok-bg:#dcfce7; --bad:#dc2626; --bad-bg:#fee2e2; --warn:#d97706; --warn-bg:#fef3c7;
  --key-bg:#eef0ff; --tip-bg:#dff7ef;
  --A:#ef4444; --T:#3b82f6; --U:#a855f7; --G:#22c55e; --C:#f59e0b;
  --old:#334155; --new:#f97316; --rna:#14b8a6; --phos:#f5b301; --sugar:#64748b; --hb:#64748b;
  --stage1:#fbfcff; --stage2:#eaeffb;
  --shadow:0 1px 2px rgba(22,32,51,.05),0 10px 30px rgba(22,32,51,.07);
  --shadow-s:0 1px 2px rgba(22,32,51,.06),0 3px 10px rgba(22,32,51,.06);
  --r:20px; --font:'Nunito',ui-rounded,system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}
[data-theme="dark"]{
  --bg:#0a0f1e; --bg2:#0f1629; --card:#141b30; --card2:#19213a; --ink:#e9edf8; --muted:#9aa5c0; --line:#26304f;
  --brand:#8f86ff; --brand2:#b196ff; --brand-soft:#232a4f; --on-brand:#0a0f1e;
  --accent:#8f86ff; --accent-soft:#232a4f;
  --ok:#4ade80; --ok-bg:#12341f; --bad:#f87171; --bad-bg:#3d1717; --warn:#fbbf24; --warn-bg:#3b2e0f;
  --key-bg:#232a4f; --tip-bg:#0f3631;
  --old:#cbd5e1; --hb:#9aa5c0; --sugar:#8a98b3;
  --stage1:#121a31; --stage2:#0d1428;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px rgba(0,0,0,.35);
  --shadow-s:0 1px 2px rgba(0,0,0,.4),0 3px 10px rgba(0,0,0,.3);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);-webkit-text-size-adjust:100%;
  background-image:radial-gradient(1200px 600px at 85% -10%,color-mix(in srgb,var(--brand) 10%,transparent),transparent 60%),radial-gradient(900px 500px at -10% 30%,color-mix(in srgb,var(--rna) 8%,transparent),transparent 60%);background-attachment:fixed}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;font-weight:800;letter-spacing:-.01em}
h1{font-size:1.9rem} h2{font-size:1.45rem;margin-top:2.1em} h3{font-size:1.1rem} h4{font-size:1rem}
p{margin:.45em 0 .85em}
a{color:var(--brand)}
button{font:inherit;color:inherit;cursor:pointer}
.muted{color:var(--muted)} .small{font-size:.88rem} .center{text-align:center}
.hidden{display:none!important}
svg{max-width:100%;height:auto}

/* ---------- aspect general ---------- */
.app{display:grid;grid-template-columns:288px minmax(0,1fr);min-height:100vh}
.side{position:sticky;top:0;height:100vh;overflow:auto;background:color-mix(in srgb,var(--card) 92%,transparent);backdrop-filter:blur(14px);border-right:1px solid var(--line);padding:18px 12px 28px}
.brand{display:flex;gap:12px;align-items:center;padding:4px 8px 16px;font-weight:900;font-size:1.08rem;letter-spacing:-.01em}
.brand .logo{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--rna));display:grid;place-items:center;color:#fff;box-shadow:0 6px 16px color-mix(in srgb,var(--brand) 40%,transparent)}
.brand small{display:block;font-weight:700;color:var(--muted);font-size:.72rem;letter-spacing:.04em}
.nav-h{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding:16px 12px 6px;font-weight:800}
.nav-item{display:flex;align-items:center;gap:11px;padding:8px 10px;border-radius:14px;color:var(--ink);text-decoration:none;font-size:.93rem;font-weight:700;transition:background .15s}
.nav-item:hover{background:var(--brand-soft)}
.nav-item.active{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 6px 16px color-mix(in srgb,var(--brand) 35%,transparent)}
.n-ico{width:30px;height:30px;border-radius:10px;display:grid;place-items:center;background:var(--accent-soft);color:var(--ac,var(--brand));flex:none}
.n-ico svg{width:18px;height:18px}
.nav-item.active .n-ico{background:rgba(255,255,255,.2);color:#fff}
.n-txt{flex:1;min-width:0;line-height:1.25}
.n-done{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-size:.65rem;color:transparent;flex:none}
.nav-item.done .n-done{background:var(--ok);border-color:var(--ok);color:#fff}
.nav-item.active .n-done{border-color:rgba(255,255,255,.55)}
.nav-item.active.done .n-done{background:#fff;color:var(--brand);border-color:#fff}
.side-foot{padding:16px 10px 0}
.main-wrap{min-width:0}
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;padding:10px 18px;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top-title{font-weight:800;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.xp{font-size:.85rem;font-weight:800;background:var(--brand-soft);color:var(--brand);padding:6px 13px;border-radius:99px;white-space:nowrap}
.icon-btn{border:1px solid var(--line);background:var(--card);border-radius:13px;width:40px;height:40px;display:grid;place-items:center;box-shadow:var(--shadow-s)}
.icon-btn svg{width:20px;height:20px}
#menuBtn{display:none}
.scrim{display:none}
main{max-width:960px;margin:0 auto;padding:24px 22px 100px;outline:none;animation:fadeUp .35s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (max-width:900px){
  .app{grid-template-columns:minmax(0,1fr)}
  .side{position:fixed;z-index:40;left:0;top:0;width:300px;transform:translateX(-104%);transition:transform .25s;box-shadow:var(--shadow);background:var(--card)}
  body.menu-open .side{transform:none}
  body.menu-open .scrim{display:block;position:fixed;inset:0;background:#0008;z-index:30}
  #menuBtn{display:grid}
  main{padding:16px 14px 100px}
  h1{font-size:1.55rem}
}

/* ---------- carduri & componente ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin:16px 0;box-shadow:var(--shadow)}
.card>h3:first-child,.card>h4:first-child{margin-top:0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid2>.card,.grid3>.card{margin:0}
@media (max-width:700px){.grid2,.grid3{grid-template-columns:1fr}}
.callout{border-radius:16px;padding:13px 18px;margin:16px 0;border-left:5px solid var(--brand);background:var(--key-bg)}
.callout.warn{border-color:var(--warn);background:var(--warn-bg)}
.callout.tip{border-color:#10b981;background:var(--tip-bg)}
.callout.bad{border-color:var(--bad);background:var(--bad-bg)}
.callout p:last-child,.callout ul:last-child{margin-bottom:0}
.callout>b:first-child{display:inline-block;margin-right:4px}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;background:linear-gradient(135deg,var(--brand),var(--brand2));color:var(--on-brand);padding:10px 20px;border-radius:14px;font-weight:800;box-shadow:0 6px 16px color-mix(in srgb,var(--brand) 30%,transparent);transition:transform .1s,filter .15s,box-shadow .15s;text-decoration:none}
.btn:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn:active{transform:scale(.97)}
.btn.ghost{background:var(--brand-soft);color:var(--brand);box-shadow:none}
.btn.ok{background:linear-gradient(135deg,#16a34a,#22c55e);color:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn.sm{padding:6px 13px;font-size:.88rem;border-radius:11px}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.pill{display:inline-block;padding:4px 14px;border-radius:99px;background:var(--brand-soft);color:var(--brand);font-weight:800;font-size:.88rem;border:2px solid transparent;cursor:pointer}
.pill:hover,.pill.on{border-color:var(--brand)}
.tag{font-size:.72rem;font-weight:800;padding:3px 10px;border-radius:99px;background:var(--brand-soft);color:var(--brand);letter-spacing:.02em}
.seg{display:inline-flex;background:var(--brand-soft);border-radius:14px;padding:4px;gap:3px;flex-wrap:wrap}
.seg button{border:0;background:transparent;padding:7px 15px;border-radius:11px;font-weight:800;color:var(--muted)}
.seg button.on{background:var(--brand);color:var(--on-brand);box-shadow:0 3px 10px color-mix(in srgb,var(--brand) 35%,transparent)}
.bar{height:11px;background:var(--line);border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:99px;transition:width .5s}
hr.dash{border:0;border-top:2px dashed var(--line);margin:16px 0}

/* ---------- antet de lecție ---------- */
.lesson-hero{position:relative;overflow:hidden;border-radius:26px;padding:26px 26px 24px;color:#fff;background:linear-gradient(135deg,var(--ac1,#5b4bf5),var(--ac2,#8b5cf6));box-shadow:0 14px 40px color-mix(in srgb,var(--ac1,#5b4bf5) 35%,transparent);margin-bottom:6px}
.lesson-hero::before,.lesson-hero::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.12)}
.lesson-hero::before{width:260px;height:260px;right:-60px;top:-90px}
.lesson-hero::after{width:150px;height:150px;right:90px;bottom:-80px}
.lh-top{display:flex;gap:16px;align-items:center;position:relative;z-index:1}
.lh-ico{width:64px;height:64px;border-radius:20px;background:rgba(255,255,255,.2);display:grid;place-items:center;flex:none;backdrop-filter:blur(6px);box-shadow:inset 0 0 0 1px rgba(255,255,255,.25)}
.lh-ico svg{width:34px;height:34px;color:#fff}
.lesson-hero h1{margin:0;font-size:1.75rem}
.lesson-hero p{margin:4px 0 0;opacity:.92}
.lh-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px;position:relative;z-index:1}
.lh-meta span{background:rgba(255,255,255,.18);padding:4px 12px;border-radius:99px;font-size:.8rem;font-weight:800}
.lesson-foot{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;margin-top:30px}
.sec-h{display:flex;align-items:center;gap:12px;margin:2.2em 0 .7em}
.sec-h .num{width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--ac1,var(--brand)),var(--ac2,var(--brand2)));color:#fff;display:grid;place-items:center;font-weight:900;font-size:.95rem;flex:none}
.sec-h h2{margin:0;font-size:1.35rem}

/* ---------- cartonașe „notițe” ---------- */
.nb{position:relative;margin:16px 0;padding:14px 18px 14px 58px;border-radius:14px;color:#1d2a44;
  background:repeating-linear-gradient(180deg,#fffef7 0,#fffef7 29px,#d6e4f5 30px);
  border:1px solid #e6dfc8;box-shadow:var(--shadow-s);font-family:'Caveat','Bradley Hand','Segoe Print','Comic Sans MS',cursive;font-size:1.28rem;line-height:30px}
.nb::before{content:"";position:absolute;left:44px;top:0;bottom:0;width:2px;background:#f0a8a8}
.nb::after{content:"";position:absolute;left:14px;top:14px;bottom:14px;width:12px;background:radial-gradient(circle,#c9cfdc 0 4px,transparent 5px) 0 0/12px 34px repeat-y}
.nb b{font-weight:700;color:#0f3b8c}
.nb u{text-decoration-color:#e11d48}
.nb p{margin:0}
.nb ul{margin:0;padding-left:20px}
.nb .e{color:#b91c1c}
[data-theme="dark"] .nb{filter:brightness(.92)}

/* ---------- baze (chips în text) ---------- */
.base{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:50%;color:#fff;font-weight:900;font-size:.9rem;vertical-align:middle;box-shadow:inset 0 -3px 0 #0003,0 1px 3px #0002;text-shadow:0 1px 1px #0004}
.bA{background:radial-gradient(circle at 35% 30%,#ff9b9b,#ef4444 55%,#a61b1b)}
.bT{background:radial-gradient(circle at 35% 30%,#93c5fd,#3b82f6 55%,#1e40af)}
.bU{background:radial-gradient(circle at 35% 30%,#e9d5ff,#a855f7 55%,#6b21a8)}
.bG{background:radial-gradient(circle at 35% 30%,#86efac,#22c55e 55%,#166534)}
.bC{background:radial-gradient(circle at 35% 30%,#fde68a,#f59e0b 55%,#b45309)}
.seq{display:inline-flex;gap:4px;flex-wrap:wrap;vertical-align:middle}
.legend{display:flex;gap:12px;flex-wrap:wrap;align-items:center;font-size:.86rem;color:var(--muted);font-weight:700}
.legend i{display:inline-block;width:14px;height:14px;border-radius:5px;vertical-align:-2px;margin-right:5px}
.circ{display:inline-grid;place-items:center;width:1.5em;height:1.5em;border:2px solid currentColor;border-radius:50%;font-weight:800;font-size:.85em;line-height:1}

/* ---------- SVG: stiluri de text ---------- */
.t{fill:var(--ink);font:700 13px var(--font)}
.t-sm{fill:var(--muted);font:700 11.5px var(--font)}
.t-xs{fill:var(--muted);font:700 10px var(--font)}
.t-w{fill:#fff;font:900 13px var(--font)}
.t-b{fill:var(--brand);font:800 13px var(--font)}
.t-lg{fill:var(--ink);font:800 16px var(--font)}
.bl{fill:#fff;font-weight:900;font-family:var(--font);paint-order:stroke;stroke:rgba(0,0,0,.32);stroke-width:2.2px;stroke-linejoin:round}
.lnk{stroke:var(--muted);stroke-width:2}
.stage{position:relative;background:linear-gradient(180deg,var(--stage1),var(--stage2));border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden}
.stage svg{display:block;width:100%;height:auto}
.stage.pad{padding:10px}
.svg-box{background:linear-gradient(180deg,var(--stage1),var(--stage2));border:1px solid var(--line);border-radius:22px;padding:10px;margin:14px 0;box-shadow:var(--shadow)}

/* ---------- player de scene ---------- */
.scene{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(250px,1fr);gap:16px;margin:16px 0;align-items:start}
.scene.single{grid-template-columns:1fr}
.scene-side{display:flex;flex-direction:column;gap:12px}
.chap-row{display:flex;flex-direction:column;gap:7px}
.chap{display:flex;gap:10px;align-items:flex-start;text-align:left;border:2px solid var(--line);background:var(--card);border-radius:14px;padding:8px 12px;font-weight:700;font-size:.88rem;line-height:1.3;transition:border-color .2s,background .2s,transform .1s}
.chap b{flex:none;width:24px;height:24px;border-radius:50%;background:var(--line);color:var(--muted);display:grid;place-items:center;font-size:.78rem}
.chap:hover{border-color:var(--brand)}
.chap.on{border-color:var(--brand);background:var(--brand-soft)}
.chap.on b{background:var(--brand);color:var(--on-brand)}
.chap.done b{background:var(--ok);color:#fff}
.scene-cap{background:var(--brand-soft);border-radius:16px;padding:12px 15px;font-size:.93rem;min-height:5.2em;line-height:1.5}
.scene-cap b{color:var(--brand)}
.ctl{grid-column:1/-1;display:flex;gap:10px;align-items:center;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:8px 12px;box-shadow:var(--shadow-s)}
.ctl .ib{width:42px;height:42px;border-radius:50%;border:0;background:var(--brand);color:var(--on-brand);display:grid;place-items:center;flex:none;box-shadow:0 4px 12px color-mix(in srgb,var(--brand) 35%,transparent)}
.ctl .ib.sec{background:var(--brand-soft);color:var(--brand);box-shadow:none;width:36px;height:36px}
.ctl .ib svg{width:18px;height:18px}
.ctl input[type=range]{flex:1;min-width:120px}
.ctl .tm{font-weight:800;font-size:.82rem;color:var(--muted);min-width:44px;text-align:right;font-variant-numeric:tabular-nums}
.ctl .sp{border:0;background:var(--brand-soft);color:var(--brand);font-weight:900;border-radius:10px;padding:6px 10px;font-size:.82rem}
@media (max-width:760px){.scene{grid-template-columns:minmax(0,1fr)}.scene-side{order:2;min-width:0}.chap-row{flex-direction:row;flex-wrap:wrap}.chap{flex:1 1 140px}}
input[type=range]{accent-color:var(--brand);width:100%}

/* ---------- întrebări / quiz ---------- */
.q-text{font-weight:800;margin-bottom:10px;font-size:1.04rem}
.q-opts{display:grid;gap:9px}
.opt{display:block;text-align:left;width:100%;padding:12px 16px;border-radius:14px;border:2px solid var(--line);background:var(--card);font-weight:700;transition:border-color .15s,background .15s,transform .1s}
.opt:hover:not(:disabled){border-color:var(--brand);transform:translateX(2px)}
.opt.ok{border-color:var(--ok);background:var(--ok-bg)}
.opt.bad{border-color:var(--bad);background:var(--bad-bg)}
.opt:disabled{cursor:default}
.q-why{margin-top:10px;padding:11px 15px;border-radius:14px;background:var(--brand-soft);font-size:.94rem}
.q-item{padding:14px 0;border-top:2px dashed var(--line)}
.q-item:first-of-type{border-top:0}

/* ---------- jocuri ---------- */
.shake{animation:shake .35s}
@keyframes shake{0%,100%{transform:none}25%{transform:translateX(-7px)}75%{transform:translateX(7px)}}
.pop{animation:pop .4s cubic-bezier(.3,1.6,.5,1)}
@keyframes pop{0%{transform:scale(.5);opacity:0}100%{transform:scale(1);opacity:1}}
.chips{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:8px 0}
.chip{border:2px solid var(--line);background:var(--card);border-radius:14px;padding:7px 14px;font-weight:800;display:inline-flex;gap:6px;align-items:center;transition:border-color .15s,background .15s}
.chip:hover{border-color:var(--brand)}
.chip.on{border-color:var(--brand);background:var(--brand-soft)}
.res{margin-top:10px;padding:11px 15px;border-radius:14px;font-weight:700}
.res.ok{background:var(--ok-bg);color:var(--ok)} .res.bad{background:var(--bad-bg);color:var(--bad)}
.res.info{background:var(--brand-soft);color:var(--ink);font-weight:600}
.pairs{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:12px 0}
.pcol{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:46px}
.pbond{height:26px;line-height:26px;font-weight:900;color:var(--muted);font-size:1.2rem;opacity:0;transition:opacity .3s}
.pbond.on{opacity:1}
.pcol .base{width:40px;height:40px;font-size:1.15rem}
.base.ghost{background:transparent;color:var(--muted);border:2px dashed var(--muted);box-shadow:none;text-shadow:none}
.base.cur{border:2px dashed var(--brand);background:var(--brand-soft);color:var(--brand);box-shadow:none;animation:blink 1s infinite;text-shadow:none}
@keyframes blink{50%{opacity:.4}}
.pcount{font-size:.72rem;color:var(--muted);height:16px;font-weight:700}
.mt{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mt button{padding:13px;border-radius:14px;border:2px solid var(--line);background:var(--card);text-align:left;min-height:58px;font-weight:700}
.mt button.sel{border-color:var(--brand);background:var(--brand-soft)}
.mt button.gone{visibility:hidden}

/* ---------- flashcards ---------- */
.flash{perspective:1000px;margin:16px auto;max-width:580px}
.fc{position:relative;height:260px;cursor:pointer;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.3,1.2,.5,1)}
.fc.flip{transform:rotateY(180deg)}
.fc>div{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:24px;display:grid;place-items:center;text-align:center;padding:26px;box-shadow:var(--shadow);border:1px solid var(--line)}
.fc .front{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:1.5rem;font-weight:900}
.fc .back{background:var(--card);transform:rotateY(180deg);font-size:1.12rem;font-weight:600}
.fc small{position:absolute;top:14px;left:18px;opacity:.75;font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;font-weight:800}

/* ---------- toast & confetti ---------- */
#toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,40px);background:var(--ink);color:var(--bg);padding:11px 22px;border-radius:99px;font-weight:800;opacity:0;pointer-events:none;transition:.3s;z-index:90;max-width:90vw;text-align:center;box-shadow:var(--shadow)}
#toast.show{opacity:1;transform:translate(-50%,0)}
.cf{position:fixed;top:-20px;font-size:1.4rem;z-index:80;pointer-events:none;animation:fall 2.2s ease-in forwards}
@keyframes fall{to{transform:translateY(105vh) rotate(540deg);opacity:.8}}

/* ---------- acasă ---------- */
.hero{position:relative;overflow:hidden;border-radius:30px;padding:30px 28px;color:#fff;background:linear-gradient(135deg,#4338ca,#7c3aed 55%,#0ea5a4);box-shadow:0 18px 50px color-mix(in srgb,#4338ca 38%,transparent);min-height:230px}
.hero h1{margin:0 0 8px;font-size:2.1rem;position:relative;z-index:1}
.hero p{margin:0;opacity:.94;max-width:470px;position:relative;z-index:1}
.hero .btn{background:#fff;color:#4338ca;box-shadow:0 8px 20px #0003;position:relative;z-index:1}
.hero canvas{position:absolute;right:-10px;top:-10px;height:calc(100% + 20px);width:300px;opacity:.95}
@media (max-width:640px){.hero canvas{opacity:.35;width:220px}}
.plan{list-style:none;padding:0;margin:0}
.plan li{display:flex;gap:12px;align-items:center;padding:10px 4px;border-bottom:1px solid var(--line)}
.plan li:last-child{border:0}
.plan a{flex:1;text-decoration:none;color:var(--ink);font-weight:800}
.plan .chk{width:26px;height:26px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-size:.8rem;color:#fff;flex:none}
.plan li.done .chk{background:var(--ok);border-color:var(--ok)}
.plan .pi{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;color:#fff;flex:none}
.plan .pi svg{width:19px;height:19px}
.tile{border-radius:20px;padding:16px;background:var(--card);border:1px solid var(--line);text-decoration:none;color:var(--ink);display:block;box-shadow:var(--shadow-s);transition:transform .15s,border-color .15s}
.tile:hover{border-color:var(--brand);transform:translateY(-2px)}
.tile .ti{width:42px;height:42px;border-radius:14px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;margin-bottom:8px}
.tile b{display:block;margin:2px 0}

/* ---------- listă de acoperire ---------- */
.cov-list{list-style:none;margin:0;padding:0}
.cov-list li{display:flex;gap:10px;align-items:flex-start;padding:6px 0;border-bottom:1px dashed var(--line);font-size:.93rem}
.cov-list li:last-child{border:0}
.cov-list .ok{flex:none;width:20px;height:20px;border-radius:50%;background:var(--ok);color:#fff;display:grid;place-items:center;font-size:.7rem;margin-top:2px}
.cov-list .go{margin-left:auto;flex:none;font-size:.75rem;font-weight:800;text-decoration:none;background:var(--brand-soft);color:var(--brand);border-radius:99px;padding:2px 10px;white-space:nowrap}

/* ---------- diverse ---------- */
.hot{cursor:pointer;transition:filter .15s}
.hot:hover{filter:brightness(1.12) drop-shadow(0 0 5px color-mix(in srgb,var(--brand) 55%,transparent))}
.hot.on{filter:drop-shadow(0 0 7px #f59e0b)}
input[type=text],input[type=number]{font:inherit;font-weight:800;padding:10px 14px;border-radius:14px;border:2px solid var(--line);background:var(--card);color:var(--ink);width:100%;max-width:320px;letter-spacing:.14em;text-transform:uppercase}
input[type=text]:focus,input[type=number]:focus{outline:none;border-color:var(--brand)}
canvas{display:block}
details{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:12px 18px;margin:10px 0;box-shadow:var(--shadow-s)}
summary{cursor:pointer;font-weight:800}
table{width:100%;border-collapse:separate;border-spacing:0;font-size:.94rem;border:1px solid var(--line);border-radius:14px;overflow:hidden}
th,td{padding:9px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}
th:last-child,td:last-child{border-right:0}
tr:last-child td{border-bottom:0}
th{background:var(--brand-soft);font-weight:800}
.tbl-wrap{overflow-x:auto}
.kv{display:flex;gap:8px;flex-wrap:wrap}
.kv>span{background:var(--card2);border:1px solid var(--line);border-radius:99px;padding:3px 12px;font-size:.84rem;font-weight:700}
.swatch{display:inline-block;width:18px;height:10px;border-radius:5px;vertical-align:middle;margin-right:5px}
@media print{.side,.top,.lesson-foot,.no-print,.mq,.ctl{display:none!important}.app{display:block}body{background:#fff}}

/* ---------- drag & drop ---------- */
.tray{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;padding:12px;border-radius:18px;background:var(--card2);border:2px dashed var(--line);min-height:70px}
.dchip{display:inline-flex;align-items:center;gap:8px;padding:6px 14px 6px 8px;border-radius:99px;background:var(--card);border:2px solid var(--line);font-weight:800;box-shadow:var(--shadow-s);cursor:grab;touch-action:none}
.dchip:active{cursor:grabbing}
.dchip.picked{border-color:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 25%,transparent)}
.dchip.good{border-color:var(--ok);background:var(--ok-bg);cursor:default}
.dchip .base{width:30px;height:30px}
.dchip .sg{width:30px;height:30px;display:grid;place-items:center}
.zone{border-radius:18px;border:2px dashed var(--line);background:var(--card2);padding:8px;transition:background .15s,border-color .15s;text-align:center;display:flex;flex-direction:column;align-items:center;gap:6px}
.zone small{font-weight:800;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.05em}
.zone.over{border-color:var(--brand);background:var(--brand-soft)}
.zbox{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;min-height:44px;width:100%;align-items:center;justify-content:center}
.venn{position:relative;max-width:600px;margin:10px auto;aspect-ratio:1/.66}
.venn .vc{position:absolute;top:8%;width:62%;aspect-ratio:1;border-radius:50%}
.venn .vL{left:0;background:color-mix(in srgb,#3b82f6 14%,transparent);border:3px solid #3b82f6}
.venn .vR{right:0;background:color-mix(in srgb,#14b8a6 14%,transparent);border:3px solid #14b8a6}
.venn .vt{position:absolute;top:0;font-weight:900;font-size:1.1rem;padding:2px 12px;border-radius:99px;color:#fff}
.venn .zone{position:absolute;top:22%;height:70%;background:color-mix(in srgb,var(--card) 70%,transparent);justify-content:flex-start;padding:6px 4px}
.venn .zL{left:3%;width:31%} .venn .zM{left:35%;width:30%} .venn .zR{right:3%;width:31%}
.venn .zbox{flex-direction:column}
@media (max-width:560px){.venn{aspect-ratio:1/.9}.venn .zone{padding:4px 2px}.dchip{padding:4px 10px 4px 5px;font-size:.85rem}.dchip .base{width:26px;height:26px;font-size:.8rem}}
.slotrow{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.slot{width:150px;min-height:128px;border-radius:20px;border:3px dashed var(--line);background:var(--card2);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:8px;transition:.15s}
.slot.over{border-color:var(--brand);background:var(--brand-soft)}
.slot.full{border-style:solid;border-color:var(--ok);background:var(--ok-bg)}
.slot b{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.svg-pop{transform-box:fill-box;transform-origin:center;animation:pop .45s cubic-bezier(.3,1.6,.5,1)}
.flame{transform-box:fill-box;transform-origin:50% 100%;animation:flick .45s ease-in-out infinite alternate}
@keyframes flick{from{transform:scale(1,1)}to{transform:scale(.92,1.14)}}
@media (max-width:900px){.grid3{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.grid3{grid-template-columns:1fr}}

main>*,.card,.stage,.scene>*{min-width:0}
.ctl input[type=range]{min-width:60px}
@media (max-width:520px){
  h1{font-size:1.4rem} h2{font-size:1.2rem}
  .lesson-hero{padding:18px 16px;border-radius:22px}
  .lesson-hero h1{font-size:1.35rem}
  .lh-ico{width:52px;height:52px;border-radius:16px}
  .lh-ico svg{width:28px;height:28px}
  .nb{font-size:1.12rem;padding-left:46px}
  .nb::before{left:34px}
  .card{padding:14px 14px;border-radius:18px}
  .ctl{gap:6px;padding:6px 8px}
  .ctl .tm{display:none}
  .hero{padding:22px 18px}.hero h1{font-size:1.6rem}
}

.hs{overflow-x:auto}
@media (max-width:640px){.hs svg{min-width:560px;max-width:none!important}}

.solve .st{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed var(--line);animation:fadeUp .35s both}
.solve .st:last-child{border:0}
.solve .st>b.n{flex:none;width:28px;height:28px;border-radius:50%;background:var(--brand);color:var(--on-brand);display:grid;place-items:center;font-size:.85rem}
.pbar{display:flex;height:34px;border-radius:12px;overflow:hidden;box-shadow:var(--shadow-s);margin:10px 0}
.pbar>div{display:grid;place-items:center;color:#fff;font-weight:900;font-size:.88rem;text-shadow:0 1px 2px #0005}
.inp-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:10px}
.inp-row label{font-size:.8rem;font-weight:800;color:var(--muted);display:block;min-height:2.6em;line-height:1.3}
.inp-row input{max-width:none;letter-spacing:0;text-transform:none}

/* ---------- teste grele ---------- */
:root{--mk-ink:#fff}
[data-theme="dark"]{--mk-ink:#0a0f1e}
.opt.hq{display:flex;gap:12px;align-items:flex-start;line-height:1.45}
.opt.hq .ot{flex:1;min-width:0}
.opt.hq .mk{flex:none;width:22px;height:22px;margin-top:1px;border:2px solid var(--muted);border-radius:7px;display:grid;place-items:center;font-size:.78rem;font-weight:900;color:var(--mk-ink);transition:background .15s,border-color .15s}
.opt.hq.mc .mk{border-radius:50%}
.opt.hq.sel{border-color:var(--brand);background:var(--brand-soft)}
.opt.hq.sel .mk{background:var(--brand);border-color:var(--brand)}
.opt.hq.sel .mk::after{content:'✓'}
.opt.hq.ok .mk{background:var(--ok);border-color:var(--ok)}
.opt.hq.ok .mk::after{content:'✓'}
.opt.hq.bad .mk{background:var(--bad);border-color:var(--bad)}
.opt.hq.bad .mk::after{content:'✕'}
.opt.hq.miss{border-style:dashed;border-color:var(--warn);background:var(--warn-bg)}
.opt.hq.miss .mk{background:var(--warn);border-color:var(--warn)}
.opt.hq.miss .mk::after{content:'!'}
.opt.hq.dim{opacity:.64}
.opt.hq.stat{cursor:default;pointer-events:none}
.hq-tf{flex:none;align-self:center;font-size:.64rem;font-weight:900;letter-spacing:.05em;text-transform:uppercase;padding:2px 8px;border-radius:99px;border:1.5px solid currentColor}
.hq-tf.t{color:var(--ok)} .hq-tf.f{color:var(--bad)}
.hq-kind.ms{background:var(--warn-bg);color:var(--warn)}
.hq-row{display:flex;gap:14px;align-items:center;padding:14px 2px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.hq-row:last-child{border-bottom:0}
.hq-row .pi{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;color:#fff;flex:none}
.hq-row .pi svg{width:22px;height:22px}
.hq-mid{flex:1;min-width:230px}
.hq-t{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:6px}
.hq-v{font-size:.7rem;font-weight:900;padding:2px 10px;border-radius:99px;color:var(--vc);background:color-mix(in srgb,var(--vc) 15%,transparent);letter-spacing:.02em}
.hq-seg{display:flex;height:11px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:4px}
.hq-seg i{display:block;height:100%;transition:width .5s}
.hq-seg .g{background:var(--ok)}
.hq-seg .r{background:var(--warn)}
.hq-act{display:flex;gap:8px;flex-wrap:wrap}
.hq-hist{display:flex;align-items:flex-end;gap:10px}
.hq-col{flex:1;max-width:48px;display:flex;flex-direction:column;align-items:center;gap:4px}
.hq-bw{height:76px;width:100%;display:flex;align-items:flex-end}
.hq-bw i{display:block;width:100%;border-radius:8px 8px 3px 3px}
.hq-col small{font-weight:800;color:var(--muted)}
.hq-ref{margin:0;padding-left:20px}
.hq-ref li{margin:6px 0}
.hq-rev{margin:14px 0}
.hq-lesson{border-color:color-mix(in srgb,#ef4444 40%,var(--line))}
@media (max-width:600px){.hq-act{width:100%}.hq-act .btn{flex:1;justify-content:center}}
#hqWrap.run>.lesson-hero{display:none}
#hqWrap.run>#hBox{margin-top:0!important}
[hidden]{display:none!important}
@media (hover:none){.hq-keys{display:none}}

select.chip{color:var(--ink)}
select.chip option{color:var(--ink);background:var(--card)}