:root{--bg:#f6f7fb;--card:#fff;--ink:#14121f;--mute:#6b6880;--line:#e6e4ef;--brand:#1f8a5b;--ok:#12b886;--bad:#e03131}
:root[data-theme=dark],:root:not([data-theme=light]){color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#000;--card:#111118;--ink:#f2f1f7;--mute:#9a97ad;--line:#232330;color-scheme:dark}}
:root[data-theme=dark]{--bg:#000;--card:#111118;--ink:#f2f1f7;--mute:#9a97ad;--line:#232330;color-scheme:dark}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;padding-bottom:40px}
header{display:flex;align-items:center;gap:10px;padding:14px 16px calc(14px + env(safe-area-inset-top,0px));position:sticky;top:0;background:var(--bg);z-index:5}
header .logo{width:32px;height:32px;border-radius:9px}
header h1{font-size:19px;margin:0;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tg,.gear{width:36px;height:36px;border-radius:50%;border:1px solid var(--line);background:var(--card);color:inherit;display:grid;place-items:center;cursor:pointer;flex:none;font-size:16px}
.tg svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
main{padding:0 16px;max-width:620px;margin:0 auto}
h2{font-size:21px;margin:4px 0 6px}h2.pt{margin-top:0}
h3{font-size:16px;margin:0 0 8px}
.sub{color:var(--mute);font-size:13px;margin:0 0 14px}
.hint{color:var(--mute);font-size:12.5px;margin:6px 0}
.sh{display:flex;align-items:center;gap:8px;margin:20px 0 8px;font-size:13px;text-transform:uppercase;letter-spacing:.04em;color:var(--mute)}
.sh span{background:var(--line);color:var(--mute);border-radius:99px;padding:1px 8px;font-size:11px}
.empty{color:var(--mute);text-align:center;padding:28px 10px;font-size:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px;margin:12px 0}
input,textarea,select{width:100%;margin:0 0 10px;padding:11px 13px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:inherit;font:inherit}
textarea{resize:vertical}
input[type=file]{padding:9px;font-size:13px}
label.f{display:block;font-size:12px;color:var(--mute);margin:2px 0 5px}
.btn{border:0;border-radius:99px;background:var(--brand);color:#fff;font:600 14px/1 inherit;padding:11px 18px;cursor:pointer}
.btn.alt{background:transparent;border:1.5px solid var(--brand);color:var(--brand)}
.btn.del{background:transparent;border:1.5px solid var(--bad);color:var(--bad)}
.btn.sm{padding:8px 13px;font-size:13px}
.btn.big{width:100%;padding:14px;font-size:16px;margin-top:6px}
.btn:disabled{opacity:.5}
.line{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.back{background:none;border:0;color:var(--mute);font:inherit;padding:6px 0;cursor:pointer;display:block}
.err{color:var(--bad);font-size:13px;min-height:18px}
.g2{display:grid;grid-template-columns:1fr 1fr;gap:0 10px}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:26px;background:#111;color:#fff;padding:11px 18px;border-radius:14px;font-size:13.5px;z-index:99;max-width:88%;text-align:center}
.tag{font-size:11px;font-weight:700;padding:3px 9px;border-radius:99px;background:var(--line);color:var(--mute);white-space:nowrap}
.tag.on{background:rgba(18,184,134,.15);color:var(--ok)}
details.fold>summary{cursor:pointer;font-weight:600;font-size:14px;list-style:none}
details.fold>summary::-webkit-details-marker{display:none}
details.fold>summary::after{content:' ▸';color:var(--mute)}
details.fold[open]>summary::after{content:' ▾'}

/* rows and tiles */
.row{display:flex;align-items:center;gap:10px;width:100%;background:none;border:0;border-bottom:1px solid var(--line);padding:13px 0;color:inherit;font:inherit;text-align:left;cursor:pointer}
.row .t{flex:1;min-width:0}
.row .t b{display:block;font-size:14.5px}
.row .t p{margin:2px 0 0;color:var(--mute);font-size:12.5px;overflow:hidden;text-overflow:ellipsis}
.row i{font-style:normal;color:var(--mute);font-size:18px}
.row .acts{display:flex;gap:6px;flex:none}
.tbtn{background:none;border:0;color:inherit;font:inherit;text-align:left;cursor:pointer;padding:0}
.row.pick.on{border-bottom-color:var(--brand)}
.row.pick.on .t b{color:var(--brand)}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.tiles3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;margin:12px 0}
.tl{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 12px;text-align:left;cursor:pointer;color:inherit;font:inherit;display:flex;flex-direction:column;gap:3px}
.tl i{font-style:normal;font-size:22px}
.tl b{font-size:14px}.tl small{color:var(--mute);font-size:11.5px;line-height:1.3}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(90px,1fr));gap:10px;margin:10px 0}
.stat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px;text-align:center}
.stat b{display:block;font-size:22px}.stat span{color:var(--mute);font-size:11.5px}

/* class picker */
.lv{width:100%;display:flex;align-items:center;justify-content:space-between;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:8px;color:inherit;font:inherit;cursor:pointer}
.lv.on{border-color:var(--brand)}
.lv b{font-size:15px}.lv i{font-style:normal;color:var(--mute)}
.cgrid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;margin:0 0 14px}
.cbtn{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 6px;font:600 13px inherit;color:inherit;cursor:pointer}
.cbtn.on{background:var(--brand);border-color:var(--brand);color:#fff}
.cls{display:flex;align-items:center;justify-content:space-between;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px;margin:8px 0 4px}
.cls small{display:block;color:var(--mute);font-size:11.5px}.cls b{font-size:18px}
.chips{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px}
.chips button{border:1px solid var(--line);background:var(--card);color:inherit;border-radius:99px;padding:7px 14px;font:600 13px inherit;cursor:pointer}
.chips button.on{background:var(--brand);border-color:var(--brand);color:#fff}

/* the test */
.bar{display:flex;align-items:center;justify-content:space-between;margin:6px 0 8px}
.clk{font-variant-numeric:tabular-nums;font-weight:700;color:var(--mute)}
.clk.hot{color:var(--bad)}
.pg{height:4px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:16px}
.pg i{display:block;height:100%;background:var(--brand);transition:width .2s}
.q p{font-size:17px;line-height:1.45;margin:0 0 10px;white-space:pre-wrap}
.qimg{display:block;max-width:100%;max-height:44vh;object-fit:contain;border-radius:12px;background:#fff;margin:10px 0}
.qimg.sm{max-width:220px}
.opt{display:flex;align-items:flex-start;gap:10px;width:100%;text-align:left;background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:13px;margin-bottom:9px;color:inherit;font:inherit;cursor:pointer}
.opt span{font-weight:700;color:var(--mute);flex:none;width:20px}
.opt.on{border-color:var(--brand);background:rgba(31,138,91,.08)}
.opt.on span{color:var(--brand)}
.dots{display:flex;flex-wrap:wrap;gap:6px;margin-top:18px}
.dots button{width:30px;height:30px;border-radius:9px;border:1px solid var(--line);background:var(--card);color:var(--mute);font:600 12px inherit;cursor:pointer}
.dots button.did{background:rgba(31,138,91,.15);color:var(--brand);border-color:transparent}
.dots button.at{background:var(--brand);color:#fff;border-color:var(--brand)}
.score{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;text-align:center;margin:10px 0}
.score b{display:block;font-size:46px;line-height:1}
.score b small{font-size:20px;color:var(--mute)}
.score span{font-weight:700;color:var(--brand)}
.score p{color:var(--mute);font-size:13px;margin:6px 0 0}
.score.poor span{color:var(--bad)}.score.fair span{color:#f59f00}
.rev{border-left:3px solid var(--ok);padding:10px 0 10px 12px;margin-bottom:12px}
.rev.no{border-left-color:var(--bad)}
.rev b{display:block;font-size:14px;font-weight:600}
.rev p{margin:5px 0 0;font-size:13px;color:var(--mute)}
.qr{border-bottom:1px solid var(--line);padding:12px 0}
.qr b{display:block;font-size:14px}
.qr p{margin:5px 0 8px;color:var(--mute);font-size:12.5px}
.shots{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.shots img{width:72px;height:72px;object-fit:cover;border-radius:10px;border:1px solid var(--line);cursor:pointer}