/* aplicatie.css — stiluri proprii lecției „Adună și scade numere cu zerouri” (doar variabile de culoare).
   Culorile ordinelor, aceleași în toată lecția: zeci de mii = roșu, mii = albastru, sute = verde, zeci = galben, unități = neutru. */

/* ---------- planșe desenate ---------- */
.plate :is(.nz-cov,.nz-rows,.nz-tab,.nz-add,.nz-cover,.nz-schimb,.nz-peste,.nz-zero,.nz-sch,.nz-reg){
  background:var(--card);color:var(--ink);border-radius:12px;padding:14px;font-weight:800}
.nz-num,.nz-cov-eq,.nz-tot,.nz-ln,.nz-zero p,.nz-tab>span,.nz-sch-r>span,.nz-col{font-family:"Baloo 2",system-ui,sans-serif}
/* spațiul de la mii (spațiu care nu se rupe) se vede clar și în cifrele mari: 1 452, nu 1452 */
:is(.nz-cov-eq,.nz-tot,.nz-zero p,.nz-imp-op,.nz-plab-op,.nz-plab-val b,.an-q,.an-scor,.nz-row b,.nz-pl){word-spacing:.1em}

/* plăcuțele (bancnote) de 1 000, 100, 10 */
.nz-pls{display:flex;flex-wrap:wrap;gap:5px;align-items:center}
.nz-pl{display:inline-flex;align-items:center;justify-content:center;box-sizing:border-box;height:calc(30px * var(--fs));min-width:calc(48px * var(--fs));padding:0 5px;border-radius:6px;border:2px solid var(--line);font-weight:900;font-size:calc(13px * var(--fs));line-height:1;white-space:nowrap;word-spacing:.12em;color:var(--ink);box-shadow:0 2px 0 var(--line)}
.nz-pl.m{background:var(--sky-tint);border-color:var(--sky);min-width:calc(56px * var(--fs))}
.nz-pl.s{background:var(--leaf-tint);border-color:var(--leaf)}
.nz-pl.z{background:var(--sun-tint);border-color:var(--sun-edge);min-width:calc(34px * var(--fs))}
.nz-pls.mic{gap:3px}
.nz-pls.mic .nz-pl{height:calc(20px * var(--fs));min-width:calc(30px * var(--fs));font-size:calc(10px * var(--fs));padding:0 2px;border-width:1.5px;box-shadow:none}

/* copertă: un singur ceas schimbă ecuația, plăcuțele și textul împreună */
.nz-cov{text-align:center;padding:20px 14px!important}
.nz-cov-eq{margin:0 0 12px;font-size:calc(36px * var(--fs));line-height:1.1;white-space:nowrap}
.nz-cov-eq .nz-r{color:var(--leaf-deep)}
.nz-cov-eq .nz-op{color:var(--berry)}
.nz-cov-pl{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;align-items:center;min-height:calc(70px * var(--fs));align-content:center}
.nz-plus{font-size:calc(26px * var(--fs));color:var(--berry);padding:0 4px}
.nz-pl.luat{opacity:.4;border-style:dashed;text-decoration:line-through;box-shadow:none}
.nz-cov.anim .nz-pl.nou{animation:nzPop .45s ease-out both}
.nz-cov.anim .nz-pl.nou:nth-child(n+6){animation-delay:.15s}
.nz-cov.anim .nz-pl.luat{animation:nzFade .6s ease-out both}
.nz-cov-txt{margin:12px 0 0;font-size:calc(21px * var(--fs))}
.nz-cov-sub{margin:4px 0 0;color:var(--muted);font-size:calc(16px * var(--fs))}
.nz-cov-sub b{color:var(--sky)}

/* stația 1: rânduri de plăcuțe */
.nz-rows{display:grid;gap:12px}
.nz-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;min-height:calc(40px * var(--fs))}
.nz-row b{font-size:calc(19px * var(--fs));white-space:nowrap}

/* stația 2: tabelul ordinelor */
.nz-tab{display:grid;grid-template-columns:repeat(5,minmax(0,1fr)) auto;gap:5px;text-align:center;align-items:stretch}
.nz-tab>span{display:flex;align-items:center;justify-content:center;border-radius:8px;min-height:calc(42px * var(--fs));font-size:calc(28px * var(--fs));line-height:1}
.nz-tab>span.h{font-family:inherit;font-size:calc(13px * var(--fs));line-height:1.1;min-height:calc(38px * var(--fs));color:var(--ink)}
.nz-tab>span.c{font-family:inherit;font-size:calc(16px * var(--fs));justify-content:flex-start;padding:0 8px;white-space:nowrap;background:var(--paper)}
.nz-tab>span.h.c{background:none;color:var(--muted)}
.nz-tab .zm,.nz-sch .zm{background:var(--berry-tint)}
.nz-tab .m,.nz-sch .m{background:var(--sky-tint)}
.nz-tab .s,.nz-sch .s{background:var(--leaf-tint)}
.nz-tab .z,.nz-sch .z{background:var(--sun-tint)}
.nz-tab .u,.nz-sch .u{background:var(--paper);box-shadow:inset 0 0 0 2px var(--line)}

/* stația 3: adunarea cu plăcuțe */
.nz-add{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:10px}
.nz-grp{display:flex;flex-direction:column;align-items:center;gap:6px}
.nz-grp .nz-pls{justify-content:center;max-width:calc(190px * var(--fs))}
.nz-grp small{font-size:calc(16px * var(--fs));color:var(--sky)}
.nz-sem{font-size:calc(34px * var(--fs));color:var(--berry)}
.nz-tot{flex-basis:100%;text-align:center;margin:6px 0 0;font-size:calc(28px * var(--fs))}
.nz-tot b{color:var(--leaf-deep)}

/* stația 4: ascundem zerourile */
.nz-cover{text-align:center}
.nz-ln{display:flex;align-items:center;justify-content:center;gap:4px;margin:6px 0;font-size:calc(32px * var(--fs));line-height:1;white-space:nowrap}
.nz-ln i{font-style:normal;color:var(--berry);padding:0 6px}
.nz-z{display:inline-flex;align-items:center;height:1.15em;padding:0 4px;border:2px dashed var(--sky);border-radius:8px;background:var(--sky-tint);color:var(--muted)}
.nz-z.mic{font-size:calc(18px * var(--fs))}
.nz-ln.mic{font-size:calc(26px * var(--fs));color:var(--leaf-deep)}
.nz-et{font-family:"Nunito",system-ui,sans-serif;font-size:calc(13px * var(--fs));color:var(--muted);margin-left:8px}
.nz-nota{margin:10px 0 0;font-size:calc(16px * var(--fs));color:var(--ink);display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap}

/* stația 5: schimbul de plăcuțe */
.nz-schimb{display:grid;gap:4px}
.nz-sch-l{display:flex;align-items:center;justify-content:center;gap:10px}
.nz-sch-l .nz-pls.mic{max-width:calc(180px * var(--fs))}
.nz-sag{font-size:calc(26px * var(--fs));color:var(--berry)}
.nz-schimb p{margin:0 0 8px;text-align:center;font-size:calc(17px * var(--fs))}

/* stația 6: peste zece */
.nz-pst{display:flex;justify-content:center;gap:16px;align-items:flex-start}
.nz-zece,.nz-rest{display:flex;flex-direction:column;align-items:center;gap:6px;border-radius:12px;padding:8px}
.nz-zece{border:3px solid var(--sky);background:var(--sky-tint)}
.nz-zece .nz-pls{max-width:calc(170px * var(--fs));justify-content:center}
.nz-rest{border:3px dashed var(--leaf)}
.nz-zece small,.nz-rest small{font-size:calc(14px * var(--fs))}
.nz-peste .nz-tot{margin-top:10px}

/* stația 7: câte zerouri */
.nz-zero{text-align:center}
.nz-zero p{margin:4px 0;font-size:calc(30px * var(--fs));line-height:1.15}
.nz-zero p.mic{font-family:"Nunito",system-ui,sans-serif;font-size:calc(15px * var(--fs));color:var(--muted);margin-bottom:12px}
.nz-zero p.mic b{color:var(--ink)}
.nz-hi{color:var(--leaf-deep)}

/* stația 9: schema împrumutului (rândurile apar pe rând; fără animații se văd toate) */
.nz-sch{display:grid;gap:6px}
.nz-sch-r{display:grid;grid-template-columns:repeat(4,calc(52px * var(--fs))) 1fr;gap:5px;align-items:center;transition:opacity .45s,transform .45s}
.nz-sch-r>span{display:flex;align-items:center;justify-content:center;height:calc(40px * var(--fs));border-radius:8px;font-size:calc(24px * var(--fs));line-height:1}
.nz-sch-r.h>span{font-family:inherit;font-size:calc(12px * var(--fs));height:calc(26px * var(--fs))}
.nz-sch-r em{font-style:normal;font-size:calc(15px * var(--fs));color:var(--muted);padding-left:6px}
.nz-sch-r>span.nou{box-shadow:inset 0 0 0 3px var(--berry);color:var(--berry)}
.nz-sch-r[data-r="3"]>span{font-weight:900}
.nz-sch[data-pas="0"] .nz-sch-r[data-r="1"],
.nz-sch[data-pas="0"] .nz-sch-r[data-r="2"],.nz-sch[data-pas="1"] .nz-sch-r[data-r="2"],
.nz-sch[data-pas="0"] .nz-sch-r[data-r="3"],.nz-sch[data-pas="1"] .nz-sch-r[data-r="3"],.nz-sch[data-pas="2"] .nz-sch-r[data-r="3"]{opacity:0;transform:translateY(-8px)}
.nz-sch.static .nz-sch-r{opacity:1!important;transform:none!important;transition:none}

/* ---------- scăderea în coloană (semnul − la dreapta primului număr) ---------- */
.nz-col{display:inline-grid;grid-template-columns:repeat(var(--n,4),calc(44px * var(--fs))) calc(34px * var(--fs));row-gap:3px;justify-content:center;font-size:calc(32px * var(--fs));line-height:1}
.nz-col>*{display:flex;align-items:center;justify-content:center;box-sizing:border-box;height:calc(42px * var(--fs));border-radius:8px}
.nz-col .imp{height:calc(22px * var(--fs));font-size:calc(18px * var(--fs));color:var(--berry);font-weight:900}
.nz-col .sem{color:var(--berry);font-weight:900}
.nz-col .linie{grid-column:1 / -2;height:0;border-top:4px solid var(--ink);border-radius:2px}
.nz-col .t{text-decoration:line-through;text-decoration-color:var(--berry);text-decoration-thickness:3px;color:var(--muted)}
.nz-col .rez{color:var(--leaf-deep)}
.nz-col .rez.gol{box-shadow:inset 0 0 0 2px var(--line)}
.nz-col .act{background:var(--sun-tint)}
.nz-col .rez.gol.act{box-shadow:inset 0 0 0 3px var(--sun-edge)}
.nz-col.anim .imp:not(:empty){animation:nzPop .4s ease-out both}
.nz-col.anim .imp[data-c="3"]{animation-delay:.15s}
.nz-col.anim .imp[data-c="2"]{animation-delay:.3s}
.nz-col.anim .imp[data-c="1"]{animation-delay:.45s}
.nz-col.anim .imp[data-c="0"]{animation-delay:.6s}
.nz-col.mini{font-size:calc(28px * var(--fs))}
.nz-col.mini>*{height:calc(38px * var(--fs))}
.nz-col.mini .imp{height:calc(22px * var(--fs))}
.nz-reg{display:flex;flex-direction:column;align-items:center;gap:10px}
.nz-reg p{margin:0;text-align:center;font-size:calc(16px * var(--fs));line-height:1.35}
.nz-reg p b{color:var(--berry)}

/* ---------- laborator: scăderea pas cu pas ---------- */
.nz-imp-top,.nz-plab-top{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;font-weight:800;color:var(--muted);font-size:calc(14px * var(--fs))}
.nz-imp-op,.nz-plab-op{font-family:"Baloo 2",system-ui,sans-serif;font-size:calc(24px * var(--fs));color:var(--ink);line-height:1.1}
.nz-imp-main{display:flex;align-items:center;gap:16px;margin-top:4px}
.nz-imp-main .nz-col{flex:0 0 auto}
.nz-imp-dr{flex:1;min-width:0;display:grid;gap:8px}
.nz-imp-pas{margin:0;min-height:3.9em;font-weight:800;font-size:calc(15px * var(--fs));line-height:1.3;color:var(--ink)}
.nz-imp-pas b{color:var(--berry)}
.nz-cif{font:inherit;color:var(--ink);background:var(--card);border:3px dashed var(--sky);cursor:pointer;width:100%;padding:0}
.nz-cif:hover:not(:disabled){background:var(--sky-tint)}
.nz-cif:disabled{border-color:transparent;cursor:default;background:none}
.nz-cif.rau{animation:nzShake .45s}
.nz-tast{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px}
.nz-tast .chip{min-height:calc(44px * var(--fs));font-size:calc(21px * var(--fs));font-weight:900;padding:0;border:3px solid var(--stripe);box-shadow:0 4px 0 var(--stripe);cursor:pointer;color:var(--ink)}
.nz-tast .chip:hover:not(:disabled){transform:translateY(-2px)}
.nz-tast .chip:disabled{opacity:.4;box-shadow:none;cursor:default}
.nz-imp-act{display:flex;justify-content:flex-end;margin-top:4px;padding-top:6px;border-top:2px dashed var(--line)}

/* ---------- laborator: atelierul plăcuțelor ---------- */
.nz-plab-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:6px}
.nz-pc{display:flex;flex-direction:column;align-items:stretch;gap:6px;border:2px solid var(--line);border-radius:14px;padding:6px 8px;background:var(--card)}
.nz-pc-h{display:flex;align-items:center;justify-content:center;gap:6px;font-weight:800;font-size:calc(15px * var(--fs));color:var(--ink)}
.nz-pc-h .nz-pl{height:calc(24px * var(--fs));box-shadow:none}
.nz-pc-pl{display:grid;grid-template-columns:repeat(3,1fr);gap:3px}
.nz-pc-pl i{height:calc(13px * var(--fs));border-radius:3px;border:1.5px dashed var(--line)}
.nz-pc.m .nz-pc-pl i.on{background:var(--sky-tint);border:2px solid var(--sky)}
.nz-pc.s .nz-pc-pl i.on{background:var(--leaf-tint);border:2px solid var(--leaf)}
.nz-pc.z .nz-pc-pl i.on{background:var(--sun-tint);border:2px solid var(--sun-edge)}
.nz-pc-btn{display:flex;align-items:center;justify-content:space-between;gap:6px}
.nz-pc-btn .chip{min-width:calc(44px * var(--fs));min-height:calc(40px * var(--fs));font-size:calc(22px * var(--fs));font-weight:900;padding:0;border:3px solid var(--stripe);box-shadow:0 4px 0 var(--stripe);cursor:pointer;color:var(--ink)}
.nz-pc-btn .chip:disabled{opacity:.45;box-shadow:none;cursor:default}
.nz-pc-n{font-family:"Baloo 2",system-ui,sans-serif;font-size:calc(26px * var(--fs));line-height:1}
.nz-plab-msg{min-height:1.4em;margin:6px 0 0;text-align:center;font-weight:800;font-size:calc(15px * var(--fs))}
.nz-plab-msg.info{color:var(--sky)} .nz-plab-msg.bine{color:var(--leaf-deep)}
.nz-plab-act{display:flex;gap:12px;justify-content:space-between;align-items:center;flex-wrap:wrap;margin-top:4px;padding-top:8px;border-top:2px dashed var(--line)}
.nz-plab-val{font-weight:800;font-size:calc(17px * var(--fs));color:var(--muted)}
.nz-plab-val b{font-family:"Baloo 2",system-ui,sans-serif;font-size:calc(26px * var(--fs));color:var(--ink)}
.nz-plab-act .verif{margin-left:auto}
.nz-plab-act .verif:disabled{opacity:.45;box-shadow:none;cursor:not-allowed}

/* telefon: cele trei coloane de plăcuțe rămân alăturate, cu butoane mai înguste */
html.flow .nz-cov-eq{font-size:calc(26px * var(--fs));white-space:normal}
html.flow .nz-ln{font-size:calc(18px * var(--fs));gap:2px}
html.flow .nz-ln i{padding:0 3px}
html.flow .nz-ln.mic{font-size:calc(19px * var(--fs))}
html.flow .an-q{font-size:calc(25px * var(--fs));white-space:normal}
html.flow .nz-tab{gap:3px;padding:10px 8px!important}
html.flow .nz-tab>span{font-size:calc(22px * var(--fs))}
html.flow .nz-tab>span.h{font-size:calc(10px * var(--fs));overflow-wrap:anywhere}
html.flow .nz-tab>span.c{font-size:calc(13px * var(--fs));padding:0 4px}
html.flow .nz-plab-cols{gap:6px}
html.flow .nz-pc{padding:6px 4px}
html.flow .nz-pc-btn{gap:3px}
html.flow .nz-pc-btn .chip{min-width:0;flex:1 1 0}
html.flow .nz-pc-h{flex-direction:column;gap:2px}
html.flow .nz-pc-btn{flex-wrap:wrap;justify-content:center}
html.flow .nz-pc-n{order:-1;flex-basis:100%;text-align:center}
html.flow .nz-imp-main{flex-direction:column;align-items:stretch;gap:10px}
html.flow .nz-imp-main .nz-col{align-self:center}
html.flow .nz-imp-pas{min-height:2.6em}

/* ---------- laborator: antrenament rapid ---------- */
.an-top{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--muted);font-size:calc(14px * var(--fs))}
.an-bar{flex:1;height:10px;background:var(--line);border-radius:99px;overflow:hidden}
.an-bar i{display:block;height:100%;background:var(--leaf);transition:width .4s}
.an-serie.aprinsa{color:var(--berry);animation:nzPop .4s ease-out}
.an-q{font-family:"Baloo 2",system-ui,sans-serif;font-size:calc(32px * var(--fs));font-weight:800;margin:12px 0;color:var(--ink);text-align:center;white-space:nowrap}
.an-q .gol{display:inline-block;min-width:3.4em;border-bottom:3px dashed var(--leaf);text-align:center;color:var(--muted)}
.an-q .gol.plin{border-bottom-style:solid;color:var(--leaf-deep);animation:nzPop .35s}
.an-var{justify-content:center}
.an-var .chip{font-size:calc(20px * var(--fs));min-width:5.5em;min-height:calc(46px * var(--fs));cursor:pointer}
.an-msg{min-height:2.7em;margin:8px 0 0;text-align:center;font-weight:800;font-size:calc(15px * var(--fs))}
.an-msg.bine{color:var(--leaf-deep)} .an-msg.rau{color:var(--berry)}
.an-final{text-align:center}
.an-scor{font-family:"Baloo 2",system-ui,sans-serif;font-size:calc(54px * var(--fs));color:var(--leaf-deep);animation:nzPop .5s}

@keyframes nzPop{0%{transform:scale(.6);opacity:.3}70%{transform:scale(1.12);opacity:1}100%{transform:none;opacity:1}}
@keyframes nzFade{from{opacity:1}to{opacity:.4}}
@keyframes nzShake{0%,100%{transform:none}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}

/* fără animații (accesibilitate) și mișcare redusă: totul în starea finală, complet */
html.a-still :is(.nz-pl,.nz-col .imp,.an-q .gol,.an-scor,.an-serie,.nz-cif){animation:none!important}
html.a-still .nz-sch-r{opacity:1!important;transform:none!important;transition:none!important}
@media (prefers-reduced-motion: reduce){
  :is(.nz-pl,.nz-col .imp,.an-q .gol,.an-scor,.an-serie,.nz-cif){animation:none!important}
  .nz-sch-r{opacity:1!important;transform:none!important;transition:none!important}
}

/* Butonul „Verifică” din bara de jos este ascuns; verificarea se deschide din cuprins sau după ultima stație. */
.bottom #checkBtn{display:none!important}


/* ===== aliniere comună (lecțiile refăcute): fără suprapuneri de butoane și text ===== */
/* plasă de siguranță: dacă o stație e mai înaltă decât scena, se derulează în interior, nu intră sub bara de jos */
html:not(.flow) .view.on{overflow-y:auto;overflow-x:hidden;scrollbar-width:thin}
/* ordonare: toate cartonașele pe un rând, loc pentru bulina cu numărul, textul rămâne în cartonaș */
.task .order{grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);grid-template-columns:none;gap:10px;margin-top:16px}
.task .order .ocard{min-width:0;padding:10px 6px 8px;overflow-wrap:anywhere;hyphens:auto}
.task .order .oc-emoji{font-size:2.1em;line-height:1.1}
.task .order .ocard .lab{font-size:calc(14px * var(--fs));line-height:1.2}
.task .order .ocard .more{font-size:calc(12px * var(--fs));line-height:1.2;color:var(--muted)}
.task .order .ocard .badge{top:-14px;left:-8px}
html.flow .task .order{grid-auto-flow:row;grid-template-columns:repeat(2,minmax(0,1fr))}
/* perechi: bulina cu numărul stă pe același rând cu textul, deci butonul nu crește după rezolvare */
.perechi .chip{display:flex;align-items:center;gap:8px;min-width:0;overflow-wrap:anywhere}
.perechi .chip[data-p]::after{flex:0 0 22px}
/* rânduri de butoane: se rup pe rândul următor în loc să se calce */
.grp,.chips,.actions{flex-wrap:wrap;row-gap:10px}
.chip,.btn{max-width:100%}
.btn{white-space:normal}