:root{--bg:#f7f4ec;--fg:#13204a;--card:#ffffff;--bar:rgba(247,244,236,.94);--line:#d9d2bd;--accent:#1d4ed8;--onaccent:#fff;--soft:#e0ecff;--r:12px;--shadow:0 4px 0 #0e7490;--font:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--hfont:"Trebuchet MS",system-ui,sans-serif}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--fg);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--accent)}a:hover{opacity:.85}
header.top{position:sticky;top:0;z-index:10;background:var(--bar);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
.logo{font-weight:800;font-size:1.3rem;text-decoration:none;color:var(--fg);display:flex;align-items:center;gap:8px;letter-spacing:.5px}
.logo img{width:30px;height:30px}
nav.menu{display:flex;gap:6px;flex-wrap:wrap}
nav.menu a{text-decoration:none;color:var(--fg);padding:6px 12px;border-radius:var(--r);font-size:.95rem;border:1px solid transparent}
nav.menu a.on,nav.menu a:hover{border-color:var(--accent);color:var(--accent)}
main{flex:1;padding:28px 0 40px}
.hero{padding:36px 0 18px}
.hero h1{font-family:var(--hfont);font-size:clamp(2rem,6vw,3.4rem);line-height:1.1;margin:0 0 12px}
.hero p{font-size:1.15rem;max-width:680px;opacity:.9}
h2{font-family:var(--hfont);font-size:1.6rem;margin:32px 0 12px}
h3{font-family:var(--hfont);margin:0 0 8px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
.card p{margin:.3rem 0 .8rem}
.btn,button{font:inherit;cursor:pointer;background:var(--accent);color:var(--onaccent);border:0;border-radius:var(--r);padding:10px 16px;font-weight:700;text-decoration:none;display:inline-block}
button.ghost,.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line)}
button:disabled{opacity:.5;cursor:default}
input,select,textarea{font:inherit;padding:9px 10px;border-radius:var(--r);border:1px solid var(--line);background:var(--card);color:var(--fg);max-width:100%}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.muted{opacity:.75}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;background:var(--soft);font-size:.85rem;margin:2px}
footer.foot{border-top:1px solid var(--line);padding:22px 0;font-size:.9rem;opacity:.85}
footer.foot .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
table{border-collapse:collapse;width:100%}td,th{padding:8px;border-bottom:1px solid var(--line);text-align:left}
.prose{max-width:720px}.prose p{margin:0 0 1em}
@media (max-width:600px){header.top{position:static}.tools,.scenebar{top:0!important}.hero{padding:18px 0 6px}nav.menu a{padding:5px 8px;font-size:.9rem}}

.hero{background:#1e3a8a;color:#fff;border-radius:20px;padding:34px 26px;margin-top:6px;position:relative;overflow:hidden;
background-image:radial-gradient(circle at 0 0,#22d3ee33 0 22px,transparent 23px),radial-gradient(circle at 100% 100%,#fbbf2433 0 22px,transparent 23px);background-size:46px 46px}
.hero h1{color:#fbbf24}.hero a{color:#fde68a}
.ornament{height:14px;margin:26px 0;background:repeating-linear-gradient(45deg,#0e7490 0 8px,#fbbf24 8px 16px,#1d4ed8 16px 24px);border-radius:7px;opacity:.85}
.tile{min-width:44px;height:48px;font-size:1.3rem;background:#1e3a8a;color:#fff;border-radius:10px;box-shadow:0 3px 0 #0e7490}
.tile:disabled{opacity:.25}.tile.small{min-width:38px;height:40px;font-size:1rem;padding:4px}
.tile.good{background:#15803d}.tile.bad{background:#b91c1c}
#tiles,#hkeys{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
#answer,#hword{font-size:2rem;letter-spacing:.25em;font-weight:700;min-height:1.5em;color:#1d4ed8;word-break:break-all}
#lqword{font-size:2.6rem;font-weight:700;color:#1d4ed8;margin:10px 0}
#lqopts{display:grid;grid-template-columns:1fr 1fr;gap:8px;max-width:520px}
#lqopts .right{background:#15803d;color:#fff}#lqopts .wrong{background:#b91c1c;color:#fff}
.flip{perspective:800px;cursor:pointer;height:140px}
.flip .in{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flip.turned .in{transform:rotateY(180deg)}
.flip .f,.flip .b{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:14px;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:10px;text-align:center}
.flip .f{background:#1e3a8a;color:#fbbf24;font-size:1.5rem;font-weight:700}.flip .b{background:#fff;border:2px solid #1e3a8a;transform:rotateY(180deg);font-size:1.2rem}
.flip small{font-size:.8rem;opacity:.75;font-weight:400;color:inherit}

.crumbs{font-size:.9rem;opacity:.8;margin:0 0 6px}.crumbs a{text-decoration:none}
article.prose h2{margin-top:28px}article.prose ul{padding-left:1.2em}article.prose li{margin:.25em 0}
.note{background:var(--soft);border-left:4px solid var(--accent);padding:10px 14px;border-radius:var(--r)}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px 16px;margin:0 0 10px}
.faq summary{cursor:pointer;font-weight:700}.faq details p{margin:.6em 0 0}
.footlinks a{margin-right:10px}
.related{margin-top:30px}
.calc output{font-weight:700}.calc table{margin-top:12px}

/* upg1: translit */
.tgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin:12px 0}
.tgrid label{display:flex;flex-direction:column;gap:6px;font-weight:700}.tgrid textarea{width:100%;min-height:140px;font-size:1.1rem;font-weight:400;resize:vertical}
.ttab{width:100%;table-layout:fixed}.ttab td,.ttab th{text-align:center;padding:6px 4px;overflow-wrap:anywhere}.ttab td:nth-child(odd){font-weight:700}

/* upg6: liczby */
#liczby{max-width:720px}#liczby h2{margin-top:8px}#lnum{width:9.5em;font-size:1.2rem}.lex button{padding:6px 12px}
.lbig{font-size:clamp(1.1rem,4.6vw,1.4rem);overflow-wrap:anywhere}.lerr{color:#b91c1c;min-height:1em;margin:4px 0}
.lparts{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}.lpart{display:flex;flex-direction:column;align-items:center;padding:4px 10px;border:1px solid var(--line);border-radius:var(--r);background:var(--soft)}.lpart small{opacity:.75}
.chk{display:flex;gap:6px;align-items:center}.qnum{font-size:clamp(2rem,9vw,3rem);font-weight:800;text-align:center;margin:12px 0}
.qopts{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:8px}.qo{text-align:left;touch-action:manipulation;overflow-wrap:anywhere}.qo small{opacity:.6;margin-right:4px}
.qo.good{background:#dcfce7;border-color:#15803d;color:#14532d;opacity:1}.qo.wrong{background:#fee2e2;border-color:#b91c1c;color:#7f1d1d;opacity:1}
#qfb.ok{color:#15803d;font-weight:700}#qfb.bad{color:#b91c1c}