:root{--navy:#13234b;--navy2:#1f3570;--gold:#b8892f;--gold2:#e9d6a8;--bg:#f5f3ee;--card:#ffffff;--ink:#1d2433;--muted:#5b6475;--line:#d9dde6;--ok:#1d7a46;--okbg:#e5f4ea;--bad:#b3261e;--badbg:#fbe9e7;--warn:#8a5a00;--warnbg:#fff4d6;--focus:#2463eb}
*{box-sizing:border-box}
html{font-size:16px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}
a{color:var(--navy2)}
button,select,input,textarea{font:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
main:focus,main:focus-visible{outline:none}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px;z-index:100}.skip:focus{left:8px}
header.top{background:var(--navy);color:#fff;border-bottom:4px solid var(--gold);position:sticky;top:0;z-index:50;box-shadow:0 2px 8px rgba(19,35,75,.25)}
[id^=mq],.sa-req,#mbsum{scroll-margin-top:calc(var(--hdr,130px) + 12px)}
tr.flash td{background:var(--gold2);transition:background .6s}
tr td{transition:background 1.2s}
.top-in{max-width:1180px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.top-in img{width:56px;height:56px;border-radius:8px;background:#fff}
.brand h1{font-size:1.15rem;margin:0;letter-spacing:.2px}
.brand p{margin:0;font-size:.85rem;color:var(--gold2)}
nav.tabs{max-width:1180px;margin:0 auto;padding:0 16px;display:flex;gap:4px;flex-wrap:wrap}
nav.tabs button{background:transparent;color:#dfe5f3;border:0;border-bottom:3px solid transparent;padding:10px 12px;cursor:pointer;font-weight:600}
nav.tabs button[aria-current="page"]{color:var(--gold);border-bottom-color:var(--gold)}
nav.tabs button[aria-current="page"]:hover{color:var(--gold)}
nav.tabs button:hover{color:#fff}
main{max-width:1180px;margin:0 auto;padding:18px 16px 60px}
.banner{padding:10px 14px;border-radius:8px;margin:0 0 14px;font-size:.92rem}
.banner.warn{background:var(--warnbg);color:var(--warn);border:1px solid #f0d58a}
.banner.err{background:var(--badbg);color:var(--bad);border:1px solid #f2b8b5}
.banner.ok-b{background:var(--okbg);color:#14532d;border:1px solid #b9dfc7}
pre.mine{white-space:pre-wrap;background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px;min-height:50px;font-family:Consolas,"Courier New",monospace;font-size:.88rem;margin:0}
.sa-bar{position:sticky;bottom:0;z-index:4;border-top:4px solid var(--gold)}
.banner.info{background:#eaf0fb;color:#1f3570;border:1px solid #c9d6f2}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:16px;box-shadow:0 1px 2px rgba(19,35,75,.05)}
.card h2{margin:0 0 10px;font-size:1.2rem;color:var(--navy)}
.card h3{margin:14px 0 8px;font-size:1.02rem;color:var(--navy)}
.grid{display:grid;gap:14px}
.g4{grid-template-columns:repeat(4,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:860px){.g4{grid-template-columns:repeat(2,1fr)}.g3,.g2{grid-template-columns:1fr}}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;border-top:4px solid var(--gold)}
.stat .n{font-size:1.9rem;font-weight:700;color:var(--navy);line-height:1.1}
.stat .l{color:var(--muted);font-size:.88rem}
.btn{display:inline-flex;align-items:center;gap:6px;background:var(--navy);color:#fff;border:1px solid var(--navy);border-radius:8px;padding:8px 14px;cursor:pointer;font-weight:600;font-size:.95rem}
.btn:hover{background:var(--navy2)}
.btn.sec{background:#fff;color:var(--navy);border-color:#b9c2d6}
.btn.sec:hover{background:#f0f3fa}
.btn.gold{background:var(--gold);border-color:var(--gold)}
.btn.danger{background:#fff;color:var(--bad);border-color:#e6a8a3}
.btn.sm{padding:5px 10px;font-size:.85rem}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn.on{background:var(--gold2);color:var(--navy);border-color:var(--gold)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.sp{flex:1}
label.f{display:flex;flex-direction:column;font-size:.85rem;color:var(--muted);gap:3px;min-width:150px}
label.f select,label.f input{padding:7px 8px;border:1px solid #b9c2d6;border-radius:7px;background:#fff;color:var(--ink)}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin:4px 0 10px}
.chip{font-size:.78rem;padding:2px 9px;border-radius:999px;background:#eef1f8;color:var(--navy2);border:1px solid #d7deee}
.chip.d-Easy{background:#e8f5ec;color:#1d6b3e;border-color:#c5e5cf}.chip.d-Medium{background:#fff4dc;color:#7a5200;border-color:#f0dca6}.chip.d-Hard{background:#fbe9e7;color:#9b2a22;border-color:#f2c4bf}
.qtext{font-size:1.02rem}
.opts{list-style:none;padding:0;margin:14px 0}
.opt{display:flex;gap:10px;align-items:flex-start;border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;margin-bottom:8px;cursor:pointer;background:#fff}
.opt:hover{border-color:#9fb0d6}
.opt input{margin-top:4px}
.opt .let{font-weight:700;color:var(--navy);min-width:20px}
.opt.sel{border-color:var(--navy2);background:#f2f5fc}
.opt.right{border-color:var(--ok);background:var(--okbg)}
.opt.wrong{border-color:var(--bad);background:var(--badbg)}
.fb{border-radius:10px;padding:12px 14px;margin:10px 0}
.fb.ok{background:var(--okbg);border:1px solid #b9dfc7}
.fb.no{background:var(--badbg);border:1px solid #f0c0bb}
.fb h4{margin:0 0 6px}
.navgrid{display:flex;flex-wrap:wrap;gap:5px;margin-top:8px}
.navgrid button{width:40px;height:34px;border-radius:6px;border:1px solid #b9c2d6;background:#fff;cursor:pointer;font-size:.8rem;font-weight:600;color:var(--navy)}
.navgrid button.ans{background:#dfe7f8}
.navgrid button.ok{background:var(--okbg);border-color:#8cc9a3}
.navgrid button.no{background:var(--badbg);border-color:#e7a29b}
.navgrid button.cur{outline:3px solid var(--gold);outline-offset:1px}
.navgrid button.flag{box-shadow:inset 0 -4px 0 var(--gold)}
.md p{margin:.45em 0}
.md ul{margin:.4em 0 .4em 1.2em;padding:0}
.md h3{font-size:1rem}
.tbl{overflow-x:auto;margin:8px 0;-webkit-overflow-scrolling:touch}
.tbl table{border-collapse:collapse;min-width:60%;font-size:.9rem;background:#fff}
.tbl th,.tbl td{border:1px solid #d6dbe6;padding:5px 9px;vertical-align:top}
.tbl th{background:#eef1f8;color:var(--navy);text-align:left}
.tbl td.num{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
.tbl tr.tot td{border-top:2px solid #5b6475;border-bottom:3px double #5b6475;font-weight:700}
.tbl caption{caption-side:top;text-align:left;font-weight:700;color:var(--navy);padding:4px 0}
.req{border-left:4px solid var(--gold);padding:8px 12px;margin:10px 0;background:#fbf8f1;border-radius:0 8px 8px 0}
.req .mk{color:var(--muted);font-weight:600;white-space:nowrap}
textarea.resp{width:100%;min-height:150px;border:1px solid #b9c2d6;border-radius:8px;padding:10px;font-family:Consolas,"Courier New",monospace;font-size:.92rem;resize:vertical;background:#fff}
.wgrid input{width:100%;border:1px solid #c8cfdd;border-radius:5px;padding:4px 6px;font-size:.88rem}
.wgrid td{padding:2px}
.ans-panel{border:1px solid #c9d6f2;background:#f7f9fe;border-radius:10px;padding:12px 14px;margin-top:10px}
.guide li{list-style:none;margin:4px 0}
.guide label{display:flex;gap:8px;align-items:flex-start;cursor:pointer}
.score{font-weight:700;color:var(--navy)}
.timer{font-variant-numeric:tabular-nums;font-weight:700;font-size:1.25rem;color:var(--navy);background:var(--gold2);padding:4px 12px;border-radius:8px}
.timer.low{background:#f7c6c1;color:#7a1b14}
.bar{height:10px;background:#e7eaf2;border-radius:6px;overflow:hidden;min-width:80px}
.bar span{display:block;height:100%;background:var(--navy2)}
table.list{width:100%;border-collapse:collapse;font-size:.92rem}
.card{overflow-x:auto}
table.list td{overflow-wrap:break-word}
@media(max-width:600px){table.list .hm{display:none}}
table.list th,table.list td{border-bottom:1px solid var(--line);padding:7px 6px;text-align:left;vertical-align:top}
table.list th{color:var(--muted);font-weight:600}
.muted{color:var(--muted)}
.small{font-size:.85rem}
.pill{display:inline-block;padding:1px 8px;border-radius:999px;font-size:.78rem;font-weight:700}
.pill.ok{background:var(--okbg);color:var(--ok)}.pill.warn{background:var(--warnbg);color:var(--warn)}.pill.no{background:var(--badbg);color:var(--bad)}.pill.na{background:#eef1f8;color:var(--muted)}
.empty{padding:26px;text-align:center;color:var(--muted)}
dialog{border:0;border-radius:12px;padding:20px;max-width:440px;box-shadow:0 10px 40px rgba(0,0,0,.25)}
dialog::backdrop{background:rgba(19,35,75,.45)}
footer{max-width:1180px;margin:0 auto;padding:0 16px 30px;color:var(--muted);font-size:.8rem}
.kbd{font-family:Consolas,monospace;background:#eef1f8;border:1px solid #cfd6e6;border-radius:4px;padding:0 5px;font-size:.8rem}
@media(max-width:700px){.top-in{padding:6px 12px;gap:10px;flex-wrap:nowrap}.brand p{display:none}.top-in img{width:38px;height:38px}.brand h1{font-size:1rem}.brand p{font-size:.75rem}nav.tabs{flex-wrap:nowrap;overflow-x:auto;padding:0 8px;-webkit-overflow-scrolling:touch;scrollbar-width:none}nav.tabs::-webkit-scrollbar{display:none}nav.tabs button{white-space:nowrap;padding:8px 10px;font-size:.9rem}}
@media print{header.top{position:static}nav.tabs,.noprint{display:none!important}body{background:#fff}.card{box-shadow:none}}
/* ---- hosted version additions ---- */
.acct{margin-left:auto;display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end;font-size:.85rem}
.acct .who{color:#dfe5f3;max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.acct .lic{background:var(--gold2);color:var(--navy);border-radius:999px;padding:2px 10px;font-weight:700}
body:not([data-gate="app"]) nav.tabs{display:none}
.auth{max-width:520px}
.auth label.f input{font-size:1rem}
.auth-intro{border-top:4px solid var(--gold)}
ol.steps{padding-left:1.2em}ol.steps li{margin:10px 0}
.sync-ok{color:var(--ok)}.sync-bad{color:var(--bad);font-weight:700}
code{background:#eef1f8;padding:0 4px;border-radius:4px}
@media(max-width:700px){.acct .who{display:none}.acct{font-size:.78rem}}
a.btn{text-decoration:none}
@media(max-width:700px){.acct .lic-l{display:none}body[data-gate="app"] .brand p{display:none}body[data-gate="app"] .brand h1{font-size:.95rem;line-height:1.2}}
@media(max-width:420px){body[data-gate="app"] .brand{display:none}}
a.home{display:flex;align-items:center;gap:14px;color:inherit;text-decoration:none;border-radius:8px}
a.home:hover h1{color:var(--gold2)}