:root{--plum:#2E2A78;--jade:#1F9D74;--sky:#3A86C8;--coral:#C8473A;--saffron:#D9A21B;
--plum-t:#ECEBF6;--jade-t:#E6F5EF;--sky-t:#E8F1FA;--coral-t:#FBEAE7;--saf-t:#FBF3DC;--ink:#1d1b33;--line:#d5d3e6;--bg:#fcfaf7}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.55 Georgia,"Times New Roman",serif;overflow-x:hidden}
h1,h2,h3,.sans,button,select,.brand,.timer,.foot{font-family:Optima,Candara,"Segoe UI","Helvetica Neue",Arial,sans-serif}
h1,h2,h3{text-align:center;color:var(--plum);line-height:1.25;margin:.6em 0 .4em}
h1{font-size:1.6rem}h2{font-size:1.25rem}h3{font-size:1.05rem}
h2::after{content:"";display:block;width:64px;height:2px;background:var(--coral);margin:.4em auto 0}
.wrap{max-width:860px;margin:0 auto;padding:0 16px}
.top{background:var(--plum);color:#fff}
.top .wrap{display:flex;justify-content:space-between;align-items:center;min-height:48px;gap:8px}
.brand{color:#fff;text-decoration:none;font-weight:700;letter-spacing:.02em}
.timer{background:#fff;color:var(--plum);border-radius:14px;padding:2px 12px;font-weight:700;font-variant-numeric:tabular-nums}
.timer.low{background:var(--coral);color:#fff}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:6px;z-index:9}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
main{padding-top:12px;padding-bottom:24px;outline:0}
button,select{font-size:1rem}
button{cursor:pointer;border:2px solid var(--plum);background:#fff;color:var(--plum);border-radius:8px;padding:10px 16px;min-height:44px;font-weight:700}
button.pri{background:var(--plum);color:#fff}
button.jade{background:var(--jade);border-color:var(--jade);color:#fff}
button:disabled{opacity:.4;cursor:not-allowed}
:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
.row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:12px 0}
.card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--plum);border-radius:8px;padding:14px;margin:12px 0}
.card.j{border-top-color:var(--jade)}.card.s{border-top-color:var(--sky)}
.tests{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.small{font-size:.9rem;color:#55526e}
.ring{display:inline-flex;align-items:center;justify-content:center;min-width:2.1em;height:2.1em;border:2px solid var(--jade);border-radius:50%;color:var(--jade);font:700 .95rem Optima,Candara,Arial,sans-serif;flex:none}
.qhead{display:flex;align-items:center;gap:10px;margin:8px 0}
.tags{font:.78rem Optima,Candara,Arial,sans-serif;color:#55526e}
.stem p{margin:.5em 0}
.scen{background:var(--plum-t);border-left:4px solid var(--plum);padding:10px 14px;border-radius:6px;margin:8px 0}
.scen h3{text-align:left;margin:0 0 4px;font-size:.85rem;letter-spacing:.08em;text-transform:uppercase}
.scen p{margin:.4em 0}
@media(min-width:900px){.wrap.casewide{max-width:1100px}.casegrid{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}.casegrid .scen{position:sticky;top:8px;margin:0}}
fieldset{border:0;margin:8px 0;padding:0;min-width:0}
legend{font:700 .85rem Optima,Candara,Arial,sans-serif;color:var(--jade);padding:0;margin-bottom:4px}
.opt{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);background:#fff;border-radius:8px;padding:10px 12px;margin:6px 0;cursor:pointer}
.opt:has(input:checked){border-color:var(--plum);background:var(--plum-t)}
.opt input{margin-top:.35em;width:20px;height:20px;flex:none;accent-color:var(--plum)}
.opt .l{font:700 1rem Optima,Candara,Arial,sans-serif;color:var(--plum);flex:none;width:1.4em}
.opt span.t{min-width:0;overflow-wrap:anywhere}
.opt.right{border-color:var(--jade);background:var(--jade-t)}
.opt.wrong{border-color:var(--coral);background:var(--coral-t)}
.hs img{display:block;max-width:100%;height:auto;margin:8px auto;border:1px solid var(--line);border-radius:6px;background:#fff}
.hsb{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.hsb label{position:relative}
.hsb input{position:absolute;opacity:0;inset:0;width:100%;height:100%;cursor:pointer;margin:0}
.hsb span{display:inline-flex;align-items:center;justify-content:center;min-width:56px;min-height:48px;border:2px solid var(--sky);border-radius:8px;font:700 1.1rem Optima,Candara,Arial,sans-serif;color:var(--sky);background:#fff}
.hsb input:checked+span{background:var(--sky);color:#fff}
.hsb input:focus-visible+span{outline:3px solid var(--plum);outline-offset:2px}
.mrow{margin:8px 0}.mrow label{display:block;margin-bottom:2px}
select{max-width:100%;width:100%;padding:9px;border:2px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
.blank{display:inline-block;background:var(--saf-t);border:1px solid var(--saffron);border-radius:10px;padding:0 8px;font:700 .85rem Optima,Candara,Arial,sans-serif}
.nav{display:flex;justify-content:space-between;gap:8px;margin:14px 0;flex-wrap:wrap}
.nav button{flex:1 1 120px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(42px,1fr));gap:6px}
.grid button{padding:0;min-height:42px;border-width:2px;border-color:var(--line);color:var(--ink);position:relative}
.grid .a{background:var(--jade-t);border-color:var(--jade)}
.grid .f{box-shadow:inset 0 -5px 0 var(--saffron)}
.grid .c{background:var(--plum);color:#fff;border-color:var(--plum)}
.grid .lk{background:#eee;color:#888}
.leg{display:flex;gap:12px;flex-wrap:wrap;font:.8rem Optima,Candara,Arial,sans-serif;margin:8px 0}
.leg i{display:inline-block;width:14px;height:14px;border:2px solid var(--line);vertical-align:-2px;margin-right:4px;border-radius:3px}
.bar{height:10px;background:var(--plum-t);border-radius:5px;overflow:hidden}.bar b{display:block;height:100%;background:var(--jade)}
table{width:100%;border-collapse:collapse;font-family:Optima,Candara,Arial,sans-serif;font-size:.95rem}
th{background:var(--plum);color:#fff;text-align:left;padding:6px 8px}td{padding:6px 8px;border-bottom:1px solid var(--line)}
tr:nth-child(even) td{background:var(--plum-t)}
.big{font:700 3rem Optima,Candara,Arial,sans-serif;color:var(--plum);text-align:center;line-height:1}
.rev{border:1px solid var(--line);border-radius:8px;background:#fff;margin:8px 0}
.rev>summary{padding:10px 12px;cursor:pointer;display:flex;gap:10px;align-items:center;min-height:44px}
.rev>div{padding:0 12px 12px}
.ok{color:var(--jade);font-weight:700}.no{color:var(--coral);font-weight:700}
.exp{background:var(--jade-t);border-left:4px solid var(--jade);padding:8px 12px;border-radius:6px;margin:8px 0}
.watch{background:var(--saf-t);border-left:4px solid var(--saffron);padding:8px 12px;border-radius:6px;margin:8px 0}
.fb{margin-top:10px}
.foot{font-size:.8rem;color:#55526e;border-top:1px solid var(--line);padding-top:10px;padding-bottom:30px}
.foot p{margin:.4em 0}
.center{text-align:center}

sup,sub{line-height:0;font-size:.75em}
.tbl{overflow-x:auto;margin:8px 0}.tbl table{min-width:260px}
.numin{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:8px 0}
.numin input{font:1.1rem Georgia,serif;padding:10px;border:2px solid var(--line);border-radius:8px;width:12em;max-width:100%}
.numin .u{font:700 1rem Optima,Candara,Arial,sans-serif;color:var(--plum)}
.fcard{min-height:150px;display:flex;align-items:center;justify-content:center;text-align:center;font-size:1.25rem;cursor:pointer;border:2px solid var(--plum);border-radius:12px;background:#fff;padding:18px;width:100%;color:var(--ink);font-weight:400}
.fcard.back{background:var(--plum-t)}
.chip{display:inline-block;background:var(--coral-t);color:var(--coral);border-radius:10px;padding:0 8px;font:700 .8rem Optima,Candara,Arial,sans-serif}