:root{--bg:#f5f7f8;--ink:#1c2630;--mute:#5a6874;--line:#d9e0e6;--brand:#0f6b6b;--brand-d:#0b5252;--ok:#1e7a46;--okbg:#e7f5ec;--err:#b3261e;--errbg:#fcebea}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Devanagari",sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--brand)}
img{max-width:100%;height:auto}
.wrap{max-width:860px;margin:0 auto;padding:0 1rem}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:.5rem 1rem;z-index:10}.skip:focus{left:0}
h1{font-size:1.5rem;line-height:1.35;margin:1rem 0 .6rem}h2{font-size:1.2rem;margin:1.6rem 0 .6rem}h3{font-size:1.05rem;margin:1rem 0 .3rem}
.sub{color:var(--mute);margin:-.3rem 0 1rem}

header.site{background:#fff;border-bottom:1px solid var(--line)}
.bar{display:flex;flex-wrap:wrap;gap:.6rem 1rem;align-items:center;padding-top:.7rem;padding-bottom:.7rem}
.brand{font-weight:700;font-size:1.3rem;color:var(--brand);text-decoration:none}
.search{display:flex;flex:1 1 220px;gap:.4rem}
.search input{flex:1;min-width:0;padding:.55rem .7rem;border:1px solid #b9c4cd;border-radius:6px;font:inherit}
.search button,.btn{background:var(--brand);color:#fff;border:0;border-radius:6px;padding:.55rem 1rem;font:inherit;cursor:pointer;text-decoration:none;display:inline-block;min-height:44px}
.search button:hover,.btn:hover{background:var(--brand-d)}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
nav.levels{border-top:1px solid var(--line);background:#fafcfc}
.scroll{display:flex;gap:.4rem;overflow-x:auto;padding-top:.5rem;padding-bottom:.5rem;-webkit-overflow-scrolling:touch}
.scroll a{white-space:nowrap;padding:.35rem .8rem;border:1px solid var(--line);border-radius:999px;background:#fff;text-decoration:none;color:var(--ink);font-size:.93rem}
.scroll a:hover{border-color:var(--brand);color:var(--brand)}
a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #5fc4c0;outline-offset:2px}

main{padding-bottom:2rem;min-height:60vh}
.hero{padding:1.2rem 0 .4rem}.hero p{color:var(--mute);margin:0 0 1rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.7rem}
.card{background:#fff;border:1px solid var(--line);border-radius:8px}
.tile{display:flex;flex-direction:column;gap:.1rem;padding:.9rem 1rem;text-decoration:none;color:var(--ink)}
.tile span{color:var(--mute);font-size:.88rem}.tile:hover{border-color:var(--brand)}
.clist,.qlist{list-style:none;margin:0 0 1rem;padding:0}
.clist a,.qlist a{display:flex;justify-content:space-between;gap:1rem;align-items:center;padding:.8rem 1rem;background:#fff;border:1px solid var(--line);border-top:0;text-decoration:none;color:var(--ink)}
.clist li:first-child a,.qlist li:first-child a{border-top:1px solid var(--line);border-radius:8px 8px 0 0}
.clist li:last-child a,.qlist li:last-child a{border-radius:0 0 8px 8px}
.clist li:only-child a,.qlist li:only-child a{border-radius:8px}
.clist small{color:var(--mute);white-space:nowrap}
.qlist a{flex-direction:column;align-items:flex-start;gap:.15rem}.qlist .qm{font-size:.82rem;color:var(--mute)}
.clist a:hover,.qlist a:hover{background:#f0f8f8}

.crumbs ol{display:flex;flex-wrap:wrap;list-style:none;margin:.9rem 0 0;padding:0;font-size:.85rem;color:var(--mute)}
.crumbs li+li::before{content:"›";margin:0 .4rem}.crumbs a{color:var(--mute)}

.rich{white-space:pre-line;overflow-wrap:anywhere}
.qpage h1.qtext{font-size:1.3rem;font-weight:600}
.tags{margin:1rem 0 0}.tag{display:inline-block;font-size:.78rem;background:#e4eeef;color:#154f4f;border-radius:4px;padding:.1rem .5rem;margin-right:.4rem}
.opts{display:grid;gap:.6rem;margin:1rem 0}
.opt{display:flex;gap:.8rem;align-items:flex-start;text-align:left;width:100%;min-height:52px;padding:.7rem .9rem;background:#fff;color:var(--ink);border:2px solid var(--line);border-radius:8px;font:inherit;cursor:pointer}
.opt:hover:not(:disabled){border-color:var(--brand)}
.opt .ltr{flex:none;width:2rem;height:2rem;display:grid;place-items:center;border-radius:50%;background:#eef2f5;font-weight:700;font-size:.9rem}
.opt .txt{flex:1;padding-top:.15rem}
.opt:disabled{cursor:default;opacity:1;color:var(--ink)}
.opt.correct{background:var(--okbg);border-color:var(--ok)}
.opt.correct .ltr{background:var(--ok);color:#fff}
.opt.correct::after{content:"✓ Sahi";color:var(--ok);font-weight:700;white-space:nowrap}
.opt.wrong{background:var(--errbg);border-color:var(--err)}
.opt.wrong .ltr{background:var(--err);color:#fff}
.opt.wrong::after{content:"✗ Galat";color:var(--err);font-weight:700;white-space:nowrap}
.result{min-height:1.5rem;font-weight:700;margin:.2rem 0 .6rem}.result.good{color:var(--ok)}.result.bad{color:var(--err)}
.answer{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:6px;padding:.2rem 1rem 1rem;margin:1rem 0}
.answer[hidden]{display:none}
.pn{display:flex;justify-content:space-between;gap:1rem;margin:1.2rem 0}.pn a{padding:.6rem 0}
.pager{display:flex;flex-wrap:wrap;gap:.35rem;margin:1rem 0}
.pager a,.pager span{min-width:44px;min-height:44px;display:inline-grid;place-items:center;padding:0 .7rem;border:1px solid var(--line);background:#fff;border-radius:6px;text-decoration:none}
.pager .on{background:var(--brand);color:#fff;border-color:var(--brand)}
footer.site{border-top:1px solid var(--line);background:#fff;color:var(--mute);font-size:.88rem;padding:1.2rem 0}
@media (min-width:700px){body{font-size:18px}h1{font-size:1.8rem}.qpage h1.qtext{font-size:1.45rem}}
.tag.src{background:#fff3d6;color:#6b4a00}

/* ---- Quiz ---- */
.qlink{font-weight:600;border-color:var(--brand)!important;color:var(--brand)!important}
.qinfo ul{margin:0 0 .6rem;padding-left:1.2rem}
.btn.big{font-size:1.1rem;padding:.7rem 1.6rem;min-height:52px}
.flash{padding:.6rem .8rem;border-radius:6px;margin:1rem 0;border:1px solid}.flash.err{background:var(--errbg);border-color:#e6aaa6;color:var(--err)}
.qbar{position:sticky;top:0;z-index:5;display:flex;gap:.8rem;align-items:center;justify-content:space-between;background:#fff;border-bottom:2px solid var(--brand);padding:.5rem .2rem;margin:0 -.2rem}
.qbar .qtitle{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.95rem}
#prog{font-size:.85rem;color:var(--mute);white-space:nowrap}
.timer{font:700 1.25rem/1 ui-monospace,Menlo,Consolas,monospace;background:var(--brand);color:#fff;border-radius:6px;padding:.45rem .6rem}
.timer.low{background:var(--err)}
.pal{display:flex;flex-wrap:wrap;gap:.35rem;margin:.8rem 0}
.pal button{width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:6px;font:inherit;cursor:pointer}
.pal button.answered{background:#d8eeee;border-color:var(--brand)}
.pal button.cur{outline:3px solid var(--brand);outline-offset:1px}
.qcard{border:1px solid var(--line);margin:0 0 1rem;padding:1rem}
.qcard legend{font-weight:700;color:var(--brand);padding:0 .4rem}
.js .qcard:not(.cur){display:none}
.qopt{display:flex;gap:.7rem;align-items:flex-start;padding:.7rem .8rem;margin:.5rem 0;background:#fff;border:2px solid var(--line);border-radius:8px;cursor:pointer;min-height:52px}
.qopt:hover{border-color:var(--brand)}
.qopt:has(input:checked){border-color:var(--brand);background:#e8f4f4}
.qopt input{margin-top:.5rem;accent-color:var(--brand);width:1.1rem;height:1.1rem;flex:none}
.qopt .ltr,.rv .ltr{flex:none;width:2rem;height:2rem;display:grid;place-items:center;border-radius:50%;background:#eef2f5;font-weight:700;font-size:.9rem}
.qopt .txt{flex:1;padding-top:.15rem}
.clr{margin-top:.4rem}
.qnav{display:flex;flex-wrap:wrap;gap:.6rem;margin:1rem 0 2rem;align-items:center}
.qnav #submitBtn{margin-left:auto}
.qnav .btn:disabled{opacity:.45;cursor:default}
.scorebox{text-align:center}
.scorebox .big{font-size:2.6rem;font-weight:700;color:var(--brand);line-height:1.2}.scorebox .big small{font-size:1.2rem;color:var(--mute)}
.stats3{display:flex;justify-content:center;gap:1.5rem;list-style:none;margin:.6rem 0 1rem;padding:0}
.stats3 strong{display:block;font-size:1.5rem}.stats3 .good{color:var(--ok)}.stats3 .bad{color:var(--err)}
.rv{padding:1rem}.rvhead{margin:0 0 .3rem;font-weight:700}
.badge2{font-size:.8rem;margin-left:.5rem;padding:.1rem .5rem;border-radius:4px;background:#eef2f5}
.badge2.good{background:var(--okbg);color:var(--ok)}.badge2.bad{background:var(--errbg);color:var(--err)}
div.opt{cursor:default}
.opt.mine.correct::after{content:"✓ Aapka jawab sahi"}
.opt.mine.wrong::after{content:"✗ Aapka jawab galat"}

/* ---- Phase 5: logo, ads, footer, cookie, pages ---- */
.brand{display:inline-flex;align-items:center;gap:.5rem}.brand img{height:40px;width:auto;max-width:220px}
.bar.center{flex-direction:column;justify-content:center;text-align:center}.bar.center .search{width:100%;max-width:480px;flex:none}
.adwrap{max-width:860px;margin:1rem auto;padding:0 1rem;text-align:center;min-height:50px;overflow:hidden}
.adwrap small{display:block;color:var(--mute);font-size:.7rem;margin-bottom:.2rem}
footer.site .flinks{display:flex;flex-wrap:wrap;gap:.4rem 1.2rem;margin-bottom:.6rem}footer.site .flinks a{color:var(--mute)}
footer.site p{margin:.2rem 0}
.cookie{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;flex-wrap:wrap;gap:.6rem 1rem;align-items:center;justify-content:center;background:#16323a;color:#e6f1f2;padding:.8rem 1rem;font-size:.9rem}
.cookie[hidden]{display:none}.cookie a{color:#9ee3df}.cookie .btn{min-height:40px;padding:.4rem 1rem}
.prose h2{margin-top:1.6rem}.prose p,.prose li{max-width:70ch}.prose ul{padding-left:1.2rem}

/* ---- Phase 6: question images ---- */
.qimg{display:block;max-width:100%;height:auto;margin:.6rem 0;border-radius:4px}
.opt .qimg,.qopt .qimg{max-height:200px;width:auto;margin:.3rem 0}