/* Kalkulator z rozwiązaniem krok po kroku (2.11.2026): zapis jak w zeszycie (ułamki piętrowe, wykładnik u góry, pierwiastek z kreską), klawiatura ekranowa. Bez bibliotek zewnętrznych. */
.mk{font-family:"Cambria Math","STIX Two Math","Latin Modern Math","Noto Serif",Georgia,serif;font-size:1.3rem;line-height:1.25;color:var(--atrament)}
.mk *{box-sizing:border-box}
.mk-fr{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;margin:0 .12em;text-align:center}
.mk-fr>.mk-n{border-bottom:.09em solid currentColor;padding:0 .22em .06em;min-width:.9em}
.mk-fr>.mk-d{padding:.06em .22em 0;min-width:.9em}
.mk-sup{font-size:.72em;vertical-align:.55em;line-height:0;margin-left:.04em}
.mk-rad{display:inline-flex;align-items:stretch;vertical-align:middle}
.mk-rs{font-size:1.15em;line-height:1;align-self:flex-end;margin-right:-.05em}
.mk-rb{border-top:.09em solid currentColor;padding:0 .12em;margin-top:.08em;display:inline-block}
.mk-pa{display:inline-flex;align-items:stretch;vertical-align:middle}
.mk-pl,.mk-pr{width:.32em;border:.08em solid currentColor;margin:.05em 0}
.mk-pl{border-right:0;border-radius:.8em 0 0 .8em/50% 0 0 50%;margin-right:.12em}
.mk-pr{border-left:0;border-radius:0 .8em .8em 0/0 50% 50% 0;margin-left:.12em}
.mk-pc{display:inline-block;vertical-align:middle}
.mk-op{padding:0 .28em}
.mk-mix{display:inline-flex;align-items:center;gap:.12em}
.mk-wyr{overflow-x:auto;padding:.25rem 0}

/* edytor */
.mk-ed{position:relative;min-height:4.4rem;padding:.7rem .8rem;background:#fff;border:2px solid var(--szary);border-radius:6px;overflow-x:auto;white-space:nowrap;cursor:text;font-size:1.55rem}
.mk-ed:focus,.mk-ed:focus-within{outline:3px solid var(--niebieski);outline-offset:1px}
.mk-ed .mk-fr,.mk-ed .mk-mix,.mk-ed .mk-rad,.mk-ed .mk-sup{white-space:nowrap}
.mk-bx{display:inline-block;min-width:.6em;min-height:1em;padding:0 .08em;vertical-align:baseline;border-radius:3px}
.mk-ed .mk-fr>.mk-bx{display:block;min-width:1em}
.mk-ed .mk-fr>.mk-d.mk-bx{border-bottom:0}
.mk-bx.mk-akt{background:#E8EFFF;box-shadow:0 0 0 2px var(--niebieski) inset}
.mk-ph{display:inline-block;width:.7em;height:.95em;border:2px dashed #8da2c4;border-radius:3px;vertical-align:middle;margin:0 .04em}
.mk-caret{display:inline-block;width:2px;height:1.15em;background:var(--niebieski);vertical-align:text-bottom;margin:0 -1px;animation:mk-mig 1s steps(2,start) infinite}
@keyframes mk-mig{to{visibility:hidden}}
.mk-ed:not(:focus):not(:focus-within) .mk-caret{opacity:.35;animation:none}
.mk-c{display:inline-block;min-width:.2em;text-align:center}
.mk-err{background:#FDE2E2;box-shadow:0 2px 0 #B91C1C;border-radius:3px}
.mk-ed .mk-ph.mk-err{border-color:#B91C1C}
.kk-msg{min-height:1.5rem;margin:.4rem 0 .6rem;font-size:.98rem}
.kk-msg.blad-zapisu{color:#7F1D1D;font-weight:600}
.kk-popr{display:flex;flex-wrap:wrap;gap:.5rem;margin:0 0 .8rem}
.kk-popr[hidden]{display:none}
.kk-popr-b{font:inherit;flex:1 1 15rem;min-height:44px;padding:.5rem .8rem;border:2px solid var(--niebieski);border-radius:.6rem;background:#fff;color:#0F172A;cursor:pointer;text-align:left;display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.kk-popr-b:hover,.kk-popr-b:focus-visible{background:#E8EFFF}
.kk-popr-t{font-weight:600;color:var(--niebieski)}
.kk-etykieta{font-weight:600;margin:.8rem 0 .3rem}

/* klawiatura */
.kk-klaw{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:.4rem;max-width:34rem;margin:.4rem 0 .8rem;touch-action:manipulation}
.kk-klaw button{font:inherit;font-size:1.35rem;min-height:3.1rem;padding:.2rem;border:2px solid var(--szary);border-radius:8px;background:var(--papier);color:var(--atrament);cursor:pointer;box-shadow:0 2px 0 var(--szary);display:flex;align-items:center;justify-content:center;gap:.1em}
.kk-klaw button:active{transform:translateY(2px);box-shadow:none}
.kk-klaw button:focus-visible{outline:3px solid var(--niebieski);outline-offset:2px}
.kk-klaw .kk-op{background:#E8EFFF}
.kk-klaw .kk-spec{background:var(--zloto-jasne);font-size:1.05rem}
.kk-klaw .kk-sterowanie{background:#fff;font-size:1rem}
.kk-klaw .kk-szeroki{grid-column:span 2}
.kk-klaw .mk{font-size:1.15rem;pointer-events:none}
.kk-tekst{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;margin:.5rem 0}
.kk-tekst input{font:inherit;padding:.5rem;border:1px solid #94A3B8;border-radius:4px;flex:1 1 14rem;min-width:0}
.kk-akcje{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center;margin:.6rem 0}
.kk-chip{font:inherit;font-size:.95rem;padding:.35rem .7rem;border:1px solid var(--niebieski);border-radius:999px;background:#fff;color:var(--niebieski);cursor:pointer}
.kk-chip:hover{background:#E8EFFF}
.kk-przyklady{display:flex;flex-wrap:wrap;gap:.4rem;margin:.3rem 0 1rem}
.kk-zakladki{display:flex;gap:.4rem;margin:.6rem 0;flex-wrap:wrap}
.kk-zakladki button{font:inherit;padding:.45rem .9rem;border:2px solid var(--niebieski);border-radius:6px;background:#fff;color:var(--niebieski);cursor:pointer;font-weight:600}
.kk-zakladki button[aria-selected=true]{background:var(--niebieski);color:#fff}

/* procenty */
.kk-proc{max-width:40rem;background:var(--papier);border:2px solid var(--szary);border-radius:6px;padding:1rem;margin:.5rem 0}
.kk-proc label{display:inline-flex;flex-direction:column;gap:.2rem;margin:.3rem .6rem .3rem 0;font-size:.95rem}
.kk-proc input[type=text]{font:inherit;padding:.4rem;border:1px solid #94A3B8;border-radius:4px;width:7rem}
.kk-proc fieldset{border:0;padding:0;margin:0 0 .5rem}

/* wynik i kroki */
.kk-wynik{margin:1rem 0}
.kk-wynik-ramka{background:var(--zloto-jasne);border-left:4px solid var(--zloto);padding:.6rem 1rem;margin:.6rem 0}
.kk-wynik-ramka .mk{font-size:1.5rem}
.kk-formy{display:flex;flex-wrap:wrap;gap:.4rem 1.6rem;align-items:center;margin-top:.4rem;font-size:1rem}
.kk-formy span.mk{font-size:1.25rem}
.kk-kroki{list-style:none;padding:0;margin:.8rem 0;counter-reset:krok}
.kk-krok{border-left:4px solid var(--niebieski);background:#fff;padding:.5rem .9rem .7rem;margin:.7rem 0;border-radius:0 6px 6px 0}
.kk-krok h3{font-size:1.02rem;margin:.1rem 0 .3rem}
.kk-krok h3::before{counter-increment:krok;content:counter(krok);display:inline-block;background:var(--niebieski);color:#fff;border-radius:50%;width:1.7rem;height:1.7rem;line-height:1.7rem;text-align:center;margin-right:.5rem;font-size:.95rem}
.kk-dlaczego{margin:.3rem 0;font-size:.98rem}
.kk-dlaczego b{color:var(--szary)}
.kk-szczegoly{margin:.3rem 0 .3rem 1.1rem;padding:0;font-size:.98rem}
.kk-szczegoly li{margin:.3rem 0}
.kk-szczegoly .mk-fr{font-size:.95em}
.kk-pul{background:var(--zloto-jasne);border-left:4px solid var(--zloto);padding:.4rem .8rem;margin:.6rem 0;font-size:.97rem}
.kk-pul h4{margin:.1rem 0 .3rem;font-size:1rem}
.kk-pul .zle{color:#7F1D1D}
.kk-pul .dobrze{color:#14532D}
.kk-zle-dobrze{display:grid;grid-template-columns:1fr 1fr;gap:.6rem}
@media (max-width:40rem){.kk-zle-dobrze{grid-template-columns:1fr}.kk-klaw{gap:.3rem}.kk-klaw button{min-height:3.2rem;font-size:1.3rem}.mk-ed{font-size:1.45rem}}
.kk-pytaj{font:inherit;font-size:.92rem;background:none;border:0;color:var(--niebieski);text-decoration:underline;cursor:pointer;padding:.2rem 0}
.kk-blad-silnika{background:#FDE2E2;border-left:4px solid #B91C1C;padding:.6rem 1rem;margin:.6rem 0}
#kk-pyt{margin:1rem 0;border:1px solid var(--szary);border-radius:6px;padding:.5rem .9rem;background:#fff}
#kk-pyt summary{cursor:pointer;font-weight:600}

.kk-kw{display:inline-block;width:.5em;height:.5em;border:2px solid currentColor;border-radius:2px;opacity:.65;vertical-align:middle}
.kk-klaw .mk{display:inline-flex;align-items:center;gap:.1em;line-height:1;font-size:1rem}
.kk-klaw .mk .mk-fr{margin:0 .05em}
.kk-klaw .mk .mk-fr>.mk-n{padding:.1em .15em .12em;min-width:0}
.kk-klaw .mk .mk-fr>.mk-d{padding:.12em .15em 0;min-width:0}
.kk-klaw button{min-height:3.1rem;height:3.1rem}
.kk-klaw button.przycisk{height:auto}

.mk-fr,.mk-rad,.mk-mix,.mk-sup,.mk-pa{font-family:"Cambria Math","STIX Two Math","Latin Modern Math","Noto Serif",Georgia,serif}
.kk-przejscie{display:flex;flex-wrap:wrap;align-items:center;gap:.2rem .6rem;margin:.2rem 0 .4rem}
.kk-przed{opacity:.75;font-size:1.1rem}
.kk-strzalka{color:var(--niebieski);font-weight:700}
.kk-po{font-weight:600}
.kk-start{margin:.5rem 0}