:root{
  --bg:#f5f7fa;--card:#fff;--ink:#14213d;--muted:#5b667a;--line:#dde3ec;
  --brand:#0b5cab;--brand-ink:#fff;--ok:#1f8a4c;--ok-bg:#e3f5ea;--bad:#c8302b;--bad-bg:#fbe7e6;--warn:#b7791f;
  --shadow:0 1px 3px rgba(20,33,61,.12),0 4px 14px rgba(20,33,61,.06);--r:14px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#10151f;--card:#1a2230;--ink:#e8edf6;--muted:#9aa6ba;--line:#2b3547;--brand:#4a9bf0;--brand-ink:#0b1220;
    --ok:#4cc27d;--ok-bg:#16301f;--bad:#ff6b66;--bad-bg:#3a1b1a;--shadow:0 1px 3px rgba(0,0,0,.5)}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  padding-bottom:env(safe-area-inset-bottom)}
a{color:var(--brand)}
.top{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px max(16px,env(safe-area-inset-left));background:var(--card);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);text-decoration:none}
.top nav{display:flex;gap:4px}
.top nav a{padding:8px 10px;border-radius:8px;text-decoration:none;color:var(--muted);font-weight:600;font-size:.95rem}
.top nav a.on{background:var(--brand);color:var(--brand-ink)}
main{max-width:980px;margin:0 auto;padding:16px;outline:none}
h1{font-size:1.6rem;margin:.2em 0 .5em}h2{font-size:1.2rem;margin:1.2em 0 .5em}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--shadow)}
.grid{display:grid;gap:12px}
.grid.cols{grid-template-columns:repeat(auto-fill,minmax(130px,1fr))}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.muted{color:var(--muted)}
button,.btn{font:inherit;cursor:pointer;border:1px solid var(--line);background:var(--card);color:var(--ink);
  padding:10px 16px;border-radius:10px;min-height:44px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:6px}
button:hover,.btn:hover{border-color:var(--brand)}
button.primary,.btn.primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand);font-weight:700}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
.chip{padding:6px 12px;border-radius:999px;min-height:36px;font-size:.9rem}
.chip.on{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
input[type=search],select{font:inherit;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--ink);min-height:44px}
input[type=search]{flex:1;min-width:180px}
.tile{display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px;text-align:center;font-size:.8rem}
.tile img{width:100%;height:90px;object-fit:contain}
.tile .code{font-weight:700}
.tile .dot{width:8px;height:8px;border-radius:50%;background:var(--line)}
.tile .dot.l1{background:var(--bad)}.tile .dot.l2{background:var(--warn)}.tile .dot.l3{background:var(--brand)}.tile .dot.l4{background:var(--ok)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin:12px 0}
.stat b{display:block;font-size:1.8rem}
.bar{height:10px;border-radius:99px;background:var(--line);overflow:hidden}.bar>i{display:block;height:100%;background:var(--ok)}
.q-img{display:flex;justify-content:center;padding:8px}
.q-img img{width:min(60vw,240px);height:min(60vw,240px);object-fit:contain}
.q-text{font-size:1.25rem;font-weight:600;text-align:center;padding:12px 4px}
.opts{display:grid;gap:10px;margin-top:8px}
.opts.imgs{grid-template-columns:1fr 1fr}
.opt{justify-content:flex-start;text-align:left;padding:12px 14px;min-height:54px;line-height:1.3}
.opts.imgs .opt{flex-direction:column;padding:8px;justify-content:center}
.opts.imgs .opt img{width:100%;height:110px;object-fit:contain}
.opt.ok{background:var(--ok-bg);border-color:var(--ok)}.opt.bad{background:var(--bad-bg);border-color:var(--bad)}
.opt[disabled]{cursor:default;opacity:1}
.feedback{margin-top:12px;padding:12px;border-radius:10px;border-left:5px solid var(--line);background:var(--bg)}
.feedback.ok{border-color:var(--ok)}.feedback.bad{border-color:var(--bad)}
.progress{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;font-size:.9rem;color:var(--muted)}
.progress .bar{flex:1}
dialog{border:none;border-radius:var(--r);padding:0;max-width:min(92vw,520px);width:100%;background:var(--card);color:var(--ink);box-shadow:var(--shadow)}
dialog::backdrop{background:rgba(0,0,0,.55)}
dialog .body{padding:20px;text-align:center}
dialog img{width:min(70vw,260px);height:min(70vw,260px);object-fit:contain}
.badge{display:inline-block;padding:2px 10px;border-radius:99px;background:var(--bg);border:1px solid var(--line);font-size:.8rem;color:var(--muted)}
#toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%) translateY(80px);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;transition:.25s;opacity:0;pointer-events:none;z-index:20}
#toast.show{transform:translateX(-50%);opacity:1}
.setup label{display:block;font-weight:600;margin:14px 0 6px}
.install{display:none}
@media (max-width:480px){.top nav a{padding:8px 7px;font-size:.88rem}.brand span{display:none}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
.fb-row{display:flex;gap:12px;align-items:center;margin-top:8px}
.fb-img{flex:none;width:84px;height:84px}
.fb-img img{width:100%;height:100%;object-fit:contain;display:block}
.fb-text{min-width:0;overflow-wrap:anywhere}

.edit{text-align:left}
.edit img{display:block;margin:0 auto}
.edit label{display:block;font-weight:600;margin:12px 0 4px}
.edit input[type=text],.edit textarea{width:100%;font:inherit;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--ink)}
.edit textarea{resize:vertical}
.edit .row{margin-top:10px}

.q-sentence{text-align:center;padding:0 4px 12px;font-size:1.05rem;overflow-wrap:anywhere}
.gap{display:inline-block;min-width:3.5em;padding:0 .4em;border-bottom:2px solid var(--muted);font-weight:700;letter-spacing:.1em}
.gap.ok{border-color:var(--ok);letter-spacing:0}
.feedback mark{background:var(--ok-bg);color:inherit;padding:0 .2em;border-radius:4px}
ul.terms{margin:.5em 0 0;padding-left:1.1em}ul.terms li{margin:.2em 0}
.terms-box{margin:12px 0}

.edit .chip{text-align:left;height:auto;line-height:1.3}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}