:root{
  --bg:#f7f7f3; --surface:#fff; --text:#1c2230; --muted:#687080; --line:#dfe1d8;
  --ink:#24489e; --ink-soft:#e7ecf8; --ok:#2e7d32; --ok-soft:#e5f2e5; --bad:#c0392b; --bad-soft:#fbe9e6;
  color-scheme: light;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#14171c; --surface:#1d2128; --text:#e5e7eb; --muted:#9aa1ad; --line:#2f3540;
    --ink:#8fb0f0; --ink-soft:#232c3d; --ok:#74c37a; --ok-soft:#1f2e21; --bad:#ef8070; --bad-soft:#35221f;
    color-scheme: dark; }
}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--bg);color:var(--text);
  font:16px/1.6 -apple-system,"Segoe UI","Noto Sans SC","PingFang SC",Roboto,sans-serif}
a{color:var(--ink)}
nav{display:flex;gap:1.2rem;align-items:center;padding:.7rem 1.2rem;border-bottom:1px solid var(--line);background:var(--surface)}
nav .brand{font-weight:700;text-decoration:none;color:var(--text)}
nav .sp{flex:1}
main{max-width:860px;margin:0 auto;padding:1.2rem}
h1{font-size:1.4rem;margin:.4rem 0 1rem}
h2{font-size:1.1rem;margin:1.6rem 0 .6rem}
.card{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:1rem 1.1rem;margin:.8rem 0}
.muted{color:var(--muted)} .err{color:var(--bad)}
button,.btn{font:inherit;border:1px solid var(--ink);background:var(--ink);color:var(--surface);
  padding:.45rem .9rem;border-radius:5px;cursor:pointer;text-decoration:none;display:inline-block}
button.ghost,.btn.ghost{background:transparent;color:var(--ink)}
button:disabled{opacity:.45;cursor:default}
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
select,input[type=text],input[type=password],textarea{font:inherit;color:var(--text);background:var(--surface);
  border:1px solid var(--line);border-radius:4px;padding:.3rem .45rem}
textarea{width:100%;min-height:16rem;line-height:1.7}
.row{display:flex;gap:.7rem;align-items:center;flex-wrap:wrap}
.instr{color:var(--muted);font-size:.95rem}
.item{padding:.55rem 0;border-top:1px dashed var(--line)}
.item:first-child{border-top:0}
.item.ok{background:var(--ok-soft)} .item.bad{background:var(--bad-soft)}
.radios label{display:block;padding:.1rem 0;cursor:pointer}
.radios.rf label{display:inline-block;margin-right:1.2rem}
.gap select{max-width:14rem}
.gap.ok select{border-color:var(--ok);background:var(--ok-soft)} .gap.bad select{border-color:var(--bad);background:var(--bad-soft)}
.gap sup{color:var(--ink);font-weight:700;margin-right:.1rem}
.pool ol{list-style:none;padding:0;margin:.4rem 0 0} .pool li{padding:.1rem 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:.6rem}
.grid .card{margin:0;font-size:.93rem}
.res{padding:.5rem 0;border-top:1px solid var(--line)}
.mark-ok{color:var(--ok);font-weight:700} .mark-bad{color:var(--bad);font-weight:700}
.score{font-size:2rem;font-weight:700;color:var(--ink)}
/* score sheet: the bar shows points against the pass line */
.sheet{display:grid;grid-template-columns:9rem 1fr 4.5rem;gap:.35rem .8rem;align-items:center}
.bar{position:relative;height:.7rem;background:var(--ink-soft);border-radius:3px}
.bar i{position:absolute;inset:0 auto 0 0;background:var(--ink);border-radius:3px}
.bar b{position:absolute;top:-.25rem;bottom:-.25rem;left:60%;width:2px;background:var(--bad)}
.total{display:flex;gap:2rem;flex-wrap:wrap;margin-bottom:.8rem}
.total div{font-size:1.5rem;font-weight:700}
.total small{display:block;font-size:.85rem;font-weight:400;color:var(--muted)}
.pass{color:var(--ok)} .fail{color:var(--bad)}
table{width:100%;border-collapse:collapse;font-size:.95rem}
td,th{padding:.45rem .3rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{font-weight:600;color:var(--muted);font-size:.85rem}
.pct{display:inline-block;width:5rem;height:.45rem;background:var(--ink-soft);border-radius:2px;vertical-align:middle;margin-right:.4rem;position:relative}
.pct i{position:absolute;inset:0 auto 0 0;background:var(--ink);border-radius:2px}
.days{display:flex;gap:3px;align-items:flex-end;height:3rem}
.days span{flex:1;background:var(--ink);min-height:2px;border-radius:2px 2px 0 0;opacity:.85}
.days span.zero{background:var(--line)}
.err-list td:first-child{color:var(--bad)} .err-list td:nth-child(2){color:var(--ok)}
.timer{font-variant-numeric:tabular-nums;color:var(--muted)}
details.script p{white-space:normal}
@media (max-width:600px){ .sheet{grid-template-columns:6.5rem 1fr 3.8rem} main{padding:.8rem} }

/* --- v2 --- */
.timer.over{color:var(--bad);font-weight:600}
.tag{display:inline-block;font-size:.8rem;padding:0 .45rem;margin-left:.4rem;border:1px solid var(--line);border-radius:3px;color:var(--muted)}
.chip{background:transparent;color:var(--text);border:1px solid var(--line);padding:.2rem .6rem;font-size:.88rem;border-radius:999px}
.chip.on{background:var(--ink);border-color:var(--ink);color:var(--surface)}
.chip.on .muted{color:inherit;opacity:.8}
.causes{margin-top:.35rem;gap:.35rem}
.cats{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:.6rem}
.zh{font-size:1.15rem;margin:.2rem 0 .8rem}
textarea.short{min-height:5rem}
mark{background:var(--ink-soft);color:inherit;padding:0 .15rem;border-radius:2px}
blockquote{margin:.6rem 0;padding:.5rem .8rem;border-left:3px solid var(--ink);background:var(--ink-soft);font-size:.95rem}
.pt{display:block;padding:.15rem 0;cursor:pointer}
body.mode-full .pt-radio{display:none}
body:not(.mode-full) .task input[name=choice]{display:none}
.modes{margin:.2rem 0 .6rem}
.turn{max-width:85%;margin:.5rem 0;padding:.5rem .8rem;border-radius:6px;border:1px solid var(--line);background:var(--surface)}
.turn p{margin:.1rem 0 0}
.turn.user{margin-left:auto;background:var(--ink-soft);border-color:transparent}
#toast{position:fixed;left:50%;bottom:1.2rem;transform:translateX(-50%);max-width:min(92vw,520px);z-index:20;
  background:var(--text);color:var(--bg);padding:.6rem .9rem;border-radius:6px;font-size:.95rem}
#toast .muted{color:inherit;opacity:.7}
#vocab-btn{position:absolute;z-index:15;padding:.2rem .6rem;font-size:.9rem}
.two{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
.two .card{margin:0}
@media (max-width:600px){ .two{grid-template-columns:1fr} }
@media print{ nav,#editor,#result,#chat,.row button,.timer{display:none!important} body{background:#fff} .card{border:0;padding:0} }