/* MeroEntrance — navy, white and gold brand system */
:root{
  --f900:#102c54;--f800:#102c54;--f700:#1e4270;--f600:#315784;--f500:#466a96;--f100:#e1e9f4;--f50:#edf2f9;
  --iv0:#ffffff;--iv50:#f7f9fc;--iv100:#eef2f8;--iv200:#e2e8f0;--iv300:#cbd5e1;
  --am:#e9ad28;--am600:#8a5c08;--am800:#75500a;--am100:#fff3d6;
  --ok:#15803d;--ok50:#eaf7ee;--bad:#b91c1c;--bad50:#fef2f2;
  --ink:#102c54;--ink2:#334155;--mut:#526177;--line:#e2e8f0;
  --serif:"Fraunces",Georgia,"Times New Roman",serif;--sans:"Manrope",system-ui,-apple-system,"Segoe UI",sans-serif;
  --np:"Mukta","Noto Sans Devanagari","Kohinoor Devanagari",sans-serif;
  --r:18px;--r-lg:28px;--shadow:0 18px 48px rgba(16,44,84,.12);--shadow-sm:0 2px 10px rgba(16,44,84,.06);
  --hd:68px;
}
*{box-sizing:border-box}
html{scroll-padding-top:calc(var(--hd) + 16px)}
body{margin:0;background:var(--iv50);color:var(--ink);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4{font-family:var(--serif);font-weight:500;color:var(--f900);margin:0;line-height:1.12;letter-spacing:-.015em}
p{margin:0}a{color:var(--f700)}ul,ol{margin:0}
img,svg{max-width:100%}
button,input,select{font:inherit;color:inherit}
.np{font-family:var(--np);letter-spacing:0;font-weight:500}
.wrap{max-width:1160px;margin:0 auto;padding:0 clamp(1rem,4vw,2rem)}
.sr{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid var(--am);outline-offset:2px;border-radius:6px}
[hidden]{display:none!important}
.skip{position:absolute;left:1rem;top:-100px;z-index:100;background:var(--f900);color:var(--iv50);padding:.7rem 1rem;border-radius:10px;font-weight:700;text-decoration:none}
.skip:focus{top:.6rem}

/* ── top strip & header ── */
.bar{background:var(--f900);color:var(--iv100);font-size:.8rem;padding:.45rem 0}
.bar .wrap{display:flex;gap:.6rem;align-items:center}.bar a{color:#f4c65c}
.dot{flex:none;width:8px;height:8px;border-radius:50%;background:var(--am)}
header.site{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.2) blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:var(--hd)}
.brand{display:flex;gap:.55rem;align-items:center;font:500 1.3rem var(--serif);color:var(--f900);text-decoration:none;white-space:nowrap}
.brand b{font-weight:600}
.tabs{display:flex;gap:.2rem}
.tabs a{padding:.5rem .9rem;border-radius:999px;text-decoration:none;font-weight:600;font-size:.92rem;color:var(--ink2);white-space:nowrap}
.tabs a:hover{background:var(--iv100)}
.tabs a[aria-current]{background:var(--f50);color:var(--f800)}
.acct{font-size:.8rem;font-weight:600;color:var(--mut);border:1px dashed var(--iv300);padding:.45rem .8rem;border-radius:999px;white-space:nowrap}

/* ── buttons ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;min-height:44px;padding:.7rem 1.2rem;border-radius:999px;font:600 .95rem/1.2 var(--sans);text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,transform .1s;text-align:center}
.btn:active{transform:translateY(1px)}
.pri{background:var(--f800);color:var(--iv50)}.pri:hover{background:var(--f700)}
.gho{border-color:var(--iv300);background:transparent;color:var(--ink)}.gho:hover{background:var(--iv100)}
.amb{background:var(--am);color:var(--f900)}.amb:hover{background:#E4A043}
.lite{background:var(--iv0);color:var(--f800);border-color:var(--line)}.lite:hover{background:var(--iv100)}
.danger{border-color:#E3B7AE;color:var(--bad);background:transparent}.danger:hover{background:var(--bad50)}
.btn[disabled],.btn[aria-disabled=true]{opacity:.5;cursor:not-allowed}
.btn.sm{min-height:36px;padding:.45rem .9rem;font-size:.85rem}
.linkish{background:none;border:0;padding:0;color:var(--f700);font-weight:600;text-decoration:underline;cursor:pointer}
.row{display:flex;flex-wrap:wrap;gap:.7rem;align-items:center}

/* ── generic ── */
main{min-height:60vh}
section.s{padding-top:clamp(2.5rem,6vw,4.5rem);padding-bottom:clamp(2.5rem,6vw,4.5rem)}
.sh{margin-bottom:2rem}.sh h2{font-size:clamp(1.8rem,3.3vw,2.6rem);max-width:24ch}.sh p{color:var(--mut);margin-top:.7rem;max-width:40rem}
.page-h{padding:clamp(2rem,5vw,3.2rem) 0 1.5rem}
.page-h h1{font-size:clamp(2rem,4vw,3.1rem)}
.page-h h1 .np{font-size:.55em;color:var(--f600);margin-left:.35rem;white-space:nowrap}
.page-h p{color:var(--mut);margin-top:.6rem;max-width:44rem}
h1:focus{outline:none}
.eyebrow{font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--f600)}
.crumbs{font-size:.85rem;color:var(--mut);margin-bottom:.8rem}.crumbs a{color:var(--mut)}.crumbs span[aria-hidden]{margin:0 .35rem}
.card{background:var(--iv0);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-sm)}
.pad{padding:clamp(1.1rem,2.5vw,1.6rem)}
.note{background:var(--am100);border-radius:14px;padding:.9rem 1.1rem;font-size:.92rem;color:#5A3A0B}
.note.green{background:var(--f50);color:var(--f800)}
.pill{display:inline-flex;align-items:center;gap:.3rem;font-size:.74rem;font-weight:700;padding:.22rem .6rem;border-radius:999px;background:var(--am100);color:var(--am800);white-space:nowrap}
.pill.pl{background:var(--iv200);color:var(--ink2)}.pill.gr{background:var(--f50);color:var(--f700)}.pill.ok{background:var(--ok50);color:var(--ok)}.pill.bad{background:var(--bad50);color:var(--bad)}
.muted{color:var(--mut)}.small{font-size:.86rem}
.meter{height:8px;border-radius:8px;background:var(--iv200);overflow:hidden}
.meter i{display:block;height:100%;background:var(--f600);border-radius:8px}
.meter.am i{background:var(--am)}.meter.bad i{background:var(--bad)}
.empty{grid-column:1/-1;text-align:center;padding:3rem 1.2rem;border:1.5px dashed var(--iv300);border-radius:var(--r);color:var(--mut);background:var(--iv0)}
.empty h2,.empty h3{margin-bottom:.5rem;font-size:1.5rem}.empty .row{justify-content:center;margin-top:1.2rem}
dl.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.9rem 1.4rem;margin:0}
dl.facts dt{font-size:.75rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--mut)}
dl.facts dd{margin:.15rem 0 0;font-weight:600}

/* ── home ── */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:3.5rem;align-items:center;padding-top:4.5rem;padding-bottom:4.5rem}
.hero h1{font-size:clamp(2.5rem,5.3vw,4.4rem)}
.lede{font-size:1.15rem;color:var(--ink2);margin-top:1.3rem;max-width:34rem}
.tag{font-size:1.05rem;color:var(--f600);margin-bottom:1rem}
.hero .row{margin-top:1.8rem}
.fine{font-size:.85rem;color:var(--mut);margin-top:1.3rem;max-width:32rem}
.art svg{display:block;width:100%;height:auto;border-radius:var(--r-lg);box-shadow:var(--shadow)}
.quick{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.quick a{display:flex;flex-direction:column;gap:.35rem;padding:1.3rem 1.4rem;text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s}
.quick a:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.quick .k{font-size:.8rem;font-weight:700;color:var(--am600)}.quick h3{font-size:1.25rem}.quick p{font-size:.9rem;color:var(--mut)}
.quick .go{margin-top:auto;padding-top:.6rem;font-weight:700;color:var(--f700);font-size:.9rem}
.tracks{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem}
.track{border-radius:var(--r-lg);padding:clamp(1.5rem,3vw,2.2rem);display:flex;flex-direction:column;gap:.9rem}
.t1{background:var(--iv100);border:1px solid var(--line)}
.t2{background:var(--f800);color:var(--iv100)}.t2 h3{color:var(--iv50)}
.track h3{font-size:1.8rem}.big{font:600 2.4rem/1.1 var(--np);color:var(--am)}
.t1 .big{color:var(--am600)}
.track ul{padding-left:1.1rem}.track .btn{align-self:flex-start;margin-top:auto}
.chips{display:flex;flex-wrap:wrap;gap:.4rem}
.chip{display:inline-flex;align-items:center;min-height:36px;font-size:.85rem;font-weight:600;padding:.3rem .8rem;border-radius:999px;border:1px solid var(--iv300);text-decoration:none;color:var(--ink2);background:var(--iv0)}
.chip:hover{border-color:var(--f600);color:var(--f800)}
.t2 .chip{border-color:rgba(245,240,228,.28);color:var(--iv100);background:transparent}.t2 .chip:hover{border-color:var(--am);color:#fff}
.t2 small{opacity:.75}
.dark{background:var(--f900);color:var(--iv100)}.dark h2{color:var(--iv50)}.dark .sh p{color:rgba(245,240,228,.72)}
.loop{display:grid;grid-template-columns:repeat(6,1fr);gap:.9rem;list-style:none;padding:0;margin:0;counter-reset:n}
.loop li{border:1px solid rgba(245,240,228,.15);border-radius:var(--r);padding:1.2rem;counter-increment:n}
.loop li::before{content:counter(n);font:500 2rem var(--serif);color:var(--am)}
.loop b{display:block;color:var(--iv50);margin-top:.5rem}.loop .np{color:#f4c65c;font-size:.9rem}.loop p{font-size:.85rem;opacity:.75;margin-top:.4rem}
.honest{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem}
.honest ul{list-style:none;padding:0;display:grid;gap:.6rem;margin-top:1rem}
.honest li{display:flex;gap:.6rem;align-items:flex-start;font-size:.95rem}
.honest li svg{flex:none;margin-top:.2rem}

/* ── course catalogue ── */
.filters{display:grid;grid-template-columns:minmax(220px,2fr) repeat(4,minmax(130px,1fr));gap:.7rem;margin-bottom:1rem}
.field{display:flex;flex-direction:column;gap:.3rem}
.field label{font-size:.78rem;font-weight:700;color:var(--mut)}
.in{min-height:46px;padding:.65rem .9rem;border:1.5px solid var(--line);border-radius:12px;background:var(--iv0);min-width:0;width:100%}
.in:focus{outline:none;border-color:var(--f600);box-shadow:0 0 0 3px rgba(16,44,84,.15)}
.results-bar{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin:0 0 1.2rem;font-size:.9rem;color:var(--mut)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:1.2rem}
.ccard{display:flex;flex-direction:column;overflow:hidden;text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s}
.ccard:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.cv{aspect-ratio:2/1;position:relative;background:var(--f800)}.cv svg{width:100%;height:100%;display:block}
.cv .pill{position:absolute;top:.7rem;left:.7rem}
.cb{padding:1rem 1.2rem 1.25rem;display:flex;flex-direction:column;gap:.25rem;flex:1}
.cb .k{font-size:.8rem;font-weight:700;color:var(--f600)}.cb h3{font-size:1.25rem}.cb .np{color:var(--mut);font-size:.95rem}
.cb .meta{margin-top:auto;padding-top:.6rem;font-size:.82rem;color:var(--mut);display:flex;flex-wrap:wrap;gap:.3rem .8rem}

/* ── course detail ── */
.chead{display:grid;grid-template-columns:1.4fr 1fr;gap:2rem;align-items:start;padding:clamp(2rem,5vw,3rem) 0 2rem}
.chead h1{font-size:clamp(2rem,4.2vw,3.2rem)}
.chead .np.sub{display:block;font-size:1.25rem;color:var(--f600);margin-top:.35rem}
.chead .cv{border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.cgrid{display:grid;grid-template-columns:1.5fr 1fr;gap:1.5rem;align-items:start;padding-bottom:3rem}
.stack{display:grid;gap:1.2rem}
.outcomes{padding-left:1.2rem;display:grid;gap:.35rem}
details.chap{border:1px solid var(--line);border-radius:14px;background:var(--iv0);overflow:hidden}
details.chap+details.chap{margin-top:.7rem}
details.chap summary{cursor:pointer;list-style:none;padding:1rem 1.2rem;display:flex;justify-content:space-between;gap:1rem;align-items:center;font-weight:700}
details.chap summary::-webkit-details-marker{display:none}
details.chap summary::after{content:"";width:10px;height:10px;border-right:2px solid var(--f700);border-bottom:2px solid var(--f700);transform:rotate(45deg);transition:transform .2s;flex:none;margin-left:.3rem}
details.chap[open] summary::after{transform:rotate(-135deg)}
details.chap summary .np{font-weight:500;color:var(--mut);font-size:.9rem;margin-left:.3rem}
.lessons{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}
.lessons li{border-top:1px solid var(--iv200)}.lessons li:first-child{border-top:0}
.lessons a,.lessons .off{display:flex;gap:.8rem;align-items:center;padding:.8rem 1.2rem;text-decoration:none;color:inherit;min-height:52px}
.lessons a:hover{background:var(--iv50)}
.lessons .off{color:var(--mut)}
.lessons .t{flex:1}.lessons .t small{display:block;color:var(--mut);font-size:.8rem}
.lnum{flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:.8rem;font-weight:700;background:var(--iv100);color:var(--f700)}
.lnum.done{background:var(--f600);color:var(--iv50)}

/* ── lesson ── */
.lwrap{display:grid;grid-template-columns:280px 1fr;gap:2rem;padding-top:1.5rem;padding-bottom:3rem;align-items:start}
.side{position:sticky;top:calc(var(--hd) + 16px);max-height:calc(100vh - var(--hd) - 32px);overflow:auto}
.side h2{font-size:1.1rem;padding:1rem 1.1rem .5rem}
.side .sch{font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--mut);padding:.8rem 1.1rem .3rem}
.side ol{list-style:none;padding:0 .5rem .6rem;margin:0}
.side a{display:flex;gap:.6rem;align-items:center;padding:.55rem .6rem;border-radius:10px;text-decoration:none;color:var(--ink2);font-size:.9rem;min-height:44px}
.side a:hover{background:var(--iv100)}
.side a[aria-current]{background:var(--f50);color:var(--f800);font-weight:700}
.side .lnum{width:24px;height:24px;font-size:.72rem}
.mside{display:none}
.lmain{min-width:0}
.lmain h1{font-size:clamp(1.8rem,3.6vw,2.6rem)}
.lmain .np.sub{display:block;color:var(--f600);font-size:1.15rem;margin-top:.3rem}
.video{position:relative;aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;background:var(--f800);margin:1.4rem 0;color:var(--iv100)}
.video svg.bg{position:absolute;inset:0;width:100%;height:100%}
.video .vmsg{position:absolute;inset:auto 0 0 0;padding:clamp(1rem,3vw,1.8rem);background:linear-gradient(transparent,rgba(16,44,84,.92) 40%)}
.video .vmsg h2{color:var(--iv50);font-size:clamp(1.15rem,2.4vw,1.5rem)}
.video .vmsg p{font-size:.92rem;opacity:.85;margin-top:.35rem;max-width:40rem}
.video .vstate{position:absolute;top:1rem;left:1rem;display:flex;gap:.5rem;flex-wrap:wrap}
.notes{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin-bottom:2rem}
.notes ul{padding-left:1.1rem;display:grid;gap:.4rem;margin-top:.7rem}
.formula{margin-top:1rem;padding:.9rem 1rem;border-radius:12px;background:var(--f900);color:var(--iv50);font:500 1.02rem/1.5 var(--serif);white-space:pre-wrap}
.formula small{display:block;font:700 .7rem var(--sans);letter-spacing:.08em;text-transform:uppercase;color:#f4c65c;margin-bottom:.2rem}
.lfoot{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--line)}
.complete{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;margin-top:1.5rem}
.btn[aria-pressed=true]{background:var(--f700);border-color:var(--f700);color:var(--iv50)}

/* ── MCQ ── */
.mcqs{display:grid;gap:1rem}
.mcq{padding:clamp(1.1rem,2.5vw,1.5rem)}
.mcq fieldset{border:0;padding:0;margin:0;min-width:0}
.mcq legend{padding:0;font-weight:600;font-size:1.05rem;line-height:1.5;margin-bottom:.9rem;width:100%}
.mcq legend .qn{display:block;font-size:.75rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--am600);margin-bottom:.35rem}
.mcq legend .np{display:block;font-weight:500;color:var(--mut);font-size:1rem;margin-top:.35rem}
.opts{display:grid;gap:.55rem}
.opt{position:relative;display:flex;align-items:center;gap:.8rem;padding:.75rem .95rem;min-height:52px;border:1.5px solid var(--line);border-radius:12px;background:var(--iv50);cursor:pointer;transition:border-color .15s,background .15s}
.opt:hover{border-color:var(--f500)}
.opt input{position:absolute;opacity:0;width:1px;height:1px}
.opt .ltr{flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.85rem;background:var(--iv0);border:1.5px solid var(--iv300);color:var(--ink2)}
.opt:has(input:checked){border-color:var(--f600);background:var(--f50)}
.opt:has(input:checked) .ltr{background:var(--f700);border-color:var(--f700);color:var(--iv50)}
.opt:has(input:focus-visible){outline:3px solid var(--am);outline-offset:2px}
.opt.is-right,.opt.is-right:has(input:checked){border-color:var(--ok);background:var(--ok50)}
.opt.is-right .ltr,.opt.is-right:has(input:checked) .ltr{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.is-wrong,.opt.is-wrong:has(input:checked){border-color:var(--bad);background:var(--bad50)}
.opt.is-wrong .ltr,.opt.is-wrong:has(input:checked) .ltr{background:var(--bad);border-color:var(--bad);color:#fff}
.opt .tagr{margin-left:auto;font-size:.75rem;font-weight:700;white-space:nowrap}
.opt.is-right .tagr{color:var(--ok)}.opt.is-wrong .tagr{color:var(--bad)}
.opts[aria-disabled=true] .opt{cursor:default}
.mcq .acts{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center;margin-top:1rem}
.mcq .hist{font-size:.8rem;color:var(--mut);margin-left:auto}
.fb{margin-top:1rem;border-radius:14px;padding:1rem 1.1rem;border:1px solid var(--line);background:var(--iv50)}
.fb .verdict{display:flex;gap:.5rem;align-items:center;font-weight:700;font-size:1rem}
.fb.right .verdict{color:var(--ok)}.fb.wrong .verdict{color:var(--bad)}
.fb h4{font:700 .78rem var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--mut);margin:.9rem 0 .4rem}
.fb ol{padding-left:1.2rem;display:grid;gap:.3rem}
.fb .slip{margin-top:.8rem;padding:.7rem .9rem;border-radius:10px;background:var(--bad50);color:#6E2518;font-size:.92rem}
.fb details{margin-top:.8rem;font-size:.92rem}.fb details summary{cursor:pointer;font-weight:600;color:var(--f700)}
.fb details ul{padding-left:1.1rem;margin-top:.4rem;display:grid;gap:.25rem}
.tally{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;padding:1rem 1.2rem;margin-top:1rem}

/* ── tests ── */
.tgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.2rem}
.tcard{display:flex;flex-direction:column;gap:.7rem}
.tcard h2{font-size:1.4rem}.tcard .np{color:var(--f600)}
.tcard .facts{display:flex;flex-wrap:wrap;gap:.4rem}
.tcard .btn{align-self:flex-start;margin-top:auto}
.rules{display:grid;gap:.6rem;padding-left:1.2rem}
.intro{display:grid;grid-template-columns:1.4fr 1fr;gap:1.5rem;align-items:start;padding-bottom:3rem}
.tbar{position:sticky;top:var(--hd);z-index:20;background:var(--f900);color:var(--iv100)}
.tbar .wrap{display:flex;align-items:center;gap:1rem;min-height:60px;flex-wrap:wrap;padding-top:.4rem;padding-bottom:.4rem}
.tbar .tt{flex:1;min-width:0;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tbar .tt small{display:block;font-weight:500;opacity:.7;font-size:.78rem}
.timer{font:600 1.45rem/1 var(--serif);font-variant-numeric:tabular-nums;padding:.45rem .8rem;border-radius:10px;background:rgba(245,240,228,.1);display:flex;align-items:center;gap:.5rem}
.timer.low{background:var(--am);color:var(--f900)}
.timer.crit{background:var(--bad);color:#fff}
.trun{display:grid;grid-template-columns:1fr 280px;gap:1.5rem;padding-top:1.5rem;padding-bottom:3rem;align-items:start}
.qpanel .acts{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.6rem;margin-top:1.2rem}
.palette{position:sticky;top:calc(var(--hd) + 80px)}
.palette h2{font-size:1.05rem;margin-bottom:.8rem}
.pgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:.4rem}
.pgrid button{min-height:44px;border-radius:10px;border:1.5px solid var(--line);background:var(--iv50);font-weight:700;cursor:pointer;position:relative}
.pgrid button.ans{background:var(--f700);color:var(--iv50);border-color:var(--f700)}
.pgrid button.flag::after{content:"";position:absolute;top:3px;right:3px;width:8px;height:8px;border-radius:50%;background:var(--am);box-shadow:0 0 0 2px var(--iv0)}
.pgrid button[aria-current]{outline:3px solid var(--am);outline-offset:1px}
.legend{display:grid;gap:.35rem;margin-top:1rem;font-size:.8rem;color:var(--mut)}
.legend span{display:flex;gap:.5rem;align-items:center}
.legend i{width:14px;height:14px;border-radius:4px;border:1.5px solid var(--line);background:var(--iv50);display:inline-block}
.legend i.a{background:var(--f700);border-color:var(--f700)}.legend i.f{background:var(--am);border-color:var(--am);border-radius:50%}
.counts{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1rem;font-size:.85rem}
.counts b{font-size:1.1rem;color:var(--f900)}
.resume{background:var(--am100);border-bottom:1px solid #EFD6A8}
.resume .wrap{display:flex;gap:1rem;align-items:center;justify-content:space-between;flex-wrap:wrap;padding-top:.55rem;padding-bottom:.55rem;font-size:.9rem;color:#5A3A0B}

/* ── dialog ── */
dialog{border:0;border-radius:var(--r);padding:0;max-width:min(480px,calc(100vw - 2rem));width:100%;box-shadow:0 30px 80px rgba(16,44,84,.35);background:var(--iv0);color:var(--ink)}
dialog::backdrop{background:rgba(16,44,84,.55)}
dialog .dbody{padding:1.6rem}
dialog h2{font-size:1.5rem;margin-bottom:.6rem}
dialog .row{justify-content:flex-end;margin-top:1.4rem}
dialog .dcounts{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;margin-top:1rem}
dialog .dcounts div{background:var(--iv100);border-radius:12px;padding:.7rem;text-align:center}
dialog .dcounts b{display:block;font:500 1.6rem var(--serif);color:var(--f900)}
dialog .dcounts span{font-size:.75rem;color:var(--mut)}

/* ── results ── */
.rhead{display:grid;grid-template-columns:auto 1fr;gap:2rem;align-items:center}
.ring{width:150px;height:150px;position:relative}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring .v{position:absolute;inset:0;display:grid;place-items:center;text-align:center}
.ring .v b{font:500 2.3rem/1 var(--serif);color:var(--f900)}.ring .v span{font-size:.8rem;color:var(--mut)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem}
.st{background:var(--iv0);border:1px solid var(--line);border-radius:14px;padding:1rem 1.1rem}
.st b{display:block;font:500 1.9rem/1.2 var(--serif);color:var(--f900)}
.st span{font-size:.82rem;color:var(--mut)}
.st small{display:block;font-size:.75rem;color:var(--mut);margin-top:.2rem}
.topics{display:grid;gap:.85rem}
.topic .th{display:flex;justify-content:space-between;gap:1rem;font-size:.92rem;margin-bottom:.3rem}
.topic .th span:last-child{color:var(--mut);white-space:nowrap}
.seg{display:flex;flex-wrap:wrap;gap:.4rem;margin:1rem 0}
.seg button{min-height:40px;padding:.4rem .9rem;border-radius:999px;border:1.5px solid var(--line);background:var(--iv0);font-weight:600;font-size:.88rem;cursor:pointer}
.seg button[aria-pressed=true]{background:var(--f800);border-color:var(--f800);color:var(--iv50)}
.rq{padding:1.2rem 1.3rem}
.rq .rqh{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;margin-bottom:.7rem}
.rq .rqh p{font-weight:600}
.rq .opt{cursor:default}

/* ── dashboard ── */
.next{display:grid;grid-template-columns:1fr auto;gap:1.2rem;align-items:center;padding:clamp(1.3rem,3vw,2rem);background:var(--f800);color:var(--iv100);border-radius:var(--r-lg);border:0}
.next h2{color:var(--iv50);font-size:clamp(1.4rem,2.6vw,1.9rem)}.next p{opacity:.8;margin-top:.35rem}
.next .eyebrow{color:#f4c65c}
.dgrid{display:grid;grid-template-columns:1.2fr 1fr;gap:1.2rem;margin-top:1.2rem}
.dgrid h2{font-size:1.3rem}
.dgrid .def{font-size:.8rem;color:var(--mut);margin:.3rem 0 1rem}
.cp+.cp{margin-top:.9rem}
.cp .th{display:flex;justify-content:space-between;gap:1rem;font-size:.92rem;margin-bottom:.3rem}
table.tbl{width:100%;border-collapse:collapse;font-size:.92rem}
.tbl th,.tbl td{text-align:left;padding:.7rem .6rem;border-bottom:1px solid var(--iv200)}
.tbl th{font-size:.75rem;letter-spacing:.05em;text-transform:uppercase;color:var(--mut)}
.tblwrap{overflow-x:auto}
.skel{display:inline-block;height:.8rem;border-radius:6px;background:var(--iv200)}
.board caption{caption-side:top;text-align:left;padding-bottom:.6rem}
.formats{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.formats .card h3{font-size:1.2rem;margin:.3rem 0}

/* ── footer & mobile nav ── */
footer{background:var(--f900);color:rgba(245,240,228,.75);padding:2.5rem 0 2rem;font-size:.86rem;margin-top:3rem}
footer .fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2rem}
footer h2{color:var(--iv50);font-size:1rem;font-family:var(--sans);font-weight:700;margin-bottom:.6rem}
footer a{color:var(--iv100)}footer ul{list-style:none;padding:0;display:grid;gap:.35rem}
footer .legal{border-top:1px solid rgba(245,240,228,.15);margin-top:2rem;padding-top:1.2rem}
.mob{display:none}

@media (max-width:980px){
  .filters{grid-template-columns:1fr 1fr}
  .filters .field:first-child{grid-column:1/-1}
  .trun{grid-template-columns:1fr}
  .palette{position:static}
  .loop{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:880px){
  :root{--hd:60px}
  .hero,.tracks,.honest,.chead,.cgrid,.intro,.dgrid,.notes,.formats{grid-template-columns:1fr}
  .hero{padding-top:2.5rem;padding-bottom:2.5rem;gap:2rem}
  .quick{grid-template-columns:1fr}
  .loop{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:.5rem}
  .loop li{min-width:72%;scroll-snap-align:start}
  .tabs.top,.acct{display:none}
  .mob{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;bottom:0;left:0;right:0;z-index:40;background:var(--iv0);border-top:1px solid var(--line);padding:.3rem .3rem calc(.3rem + env(safe-area-inset-bottom))}
  .mob a{display:flex;flex-direction:column;align-items:center;gap:.1rem;padding:.35rem 0;min-height:52px;justify-content:center;text-decoration:none;color:var(--mut);font-size:.7rem;font-weight:700;border-radius:12px}
  .mob a[aria-current]{color:var(--f800);background:var(--f50)}
  body{padding-bottom:76px}
  .lwrap{grid-template-columns:1fr;gap:1rem}
  .side{display:none}
  .mside{display:block}
  .rhead{grid-template-columns:1fr;justify-items:start}
  .next{grid-template-columns:1fr}
  footer .fgrid{grid-template-columns:1fr}
  .tbar{top:var(--hd)}
  .timer{font-size:1.25rem}
}
@media (max-width:520px){
  .filters{grid-template-columns:1fr}
  .bar{font-size:.74rem}
  .pgrid{grid-template-columns:repeat(5,1fr)}
  .mcq .hist{margin-left:0;width:100%}
  dialog .dcounts{grid-template-columns:1fr 1fr 1fr}
  .tbar .wrap{gap:.4rem .8rem}
  .tbar .tt{flex:1 1 100%;font-size:.85rem}
  .tbar .tt small{display:none}
  .tbar .timer{margin-right:auto}
  .ccard .cv{aspect-ratio:5/2}
  .video{aspect-ratio:auto}
  .video .vmsg{position:relative;padding-top:7.5rem}
  .qpanel .acts>.row{width:100%}
  .qpanel .acts>.row:last-child .btn{flex:1}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
@media print{.bar,header.site,.mob,footer,.tbar,.resume{display:none!important}body{background:#fff}}

/* Momentum edition: contrast, depth and motion with a quiet learning workspace. */
:root{--serif:"Manrope",system-ui,sans-serif;--r:16px;--r-lg:24px;--iv50:#f7f9fc;--iv0:#ffffff;--line:#e2e8f0}
h1,h2,h3{font-weight:700;letter-spacing:-.045em}h4{font-weight:700}.brand{font-weight:700;letter-spacing:-.05em}.wrap{max-width:1280px}
.bar{background:#e9ad28;color:#102c54}.bar a{color:#102c54}.bar .dot{background:#102c54}
header.site{background:rgba(255,255,255,.94);backdrop-filter:blur(22px)}
.tabs a{transition:background .2s,transform .2s}.tabs a:hover{transform:translateY(-2px)}
.btn{transition:transform .25s,box-shadow .25s,background .2s}.btn:hover{transform:translateY(-3px);box-shadow:0 8px 22px #122c2020}.btn:active{transform:translateY(1px)}
.launch{position:relative;overflow:hidden;background:#102c54;color:#f7f9fc;isolation:isolate}
.launch:before{content:"";position:absolute;inset:-35% -25% 0 35%;z-index:-1;background:radial-gradient(ellipse,#e9ad2820,transparent 65%);animation:halo-shift 12s ease-in-out infinite alternate}
.launch-grid{position:absolute;inset:0;z-index:-1;background-image:linear-gradient(#102c5407 1px,transparent 1px),linear-gradient(90deg,#102c5407 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(90deg,transparent,#000)}
.launch .hero{grid-template-columns:1.08fr 1fr;gap:4rem;padding-block:5rem 4rem;min-height:660px}
.launch-label{font-size:.65rem;font-weight:700;letter-spacing:.15em;display:flex;gap:.7rem;align-items:center;margin-bottom:1.8rem;color:#526177}.launch-label span{width:7px;height:7px;background:#e9ad28;border-radius:50%;box-shadow:0 0 18px #e9ad28}
.launch h1{font-size:clamp(3.3rem,6.4vw,5.6rem);font-weight:700;line-height:1.01;letter-spacing:-.075em;color:#102c54}.launch h1 em{font-style:normal;color:#e9ad28;display:inline-block}
.launch .tag{color:#315784;margin:1.3rem 0 0;font-size:1.25rem}.launch .lede{font-size:1rem;max-width:31rem;color:#526177;margin-top:.7rem;line-height:1.8}
.launch .pri{background:#e9ad28;color:#102c54}.launch .pri:hover{background:#f4c65c;box-shadow:0 8px 30px #102c5415}.launch .gho{border-color:#b6c6db;color:#102c54}.launch .gho:hover{background:#edf2f9}
.hero-facts{display:flex;gap:1.5rem;margin-top:2.2rem;font-size:.7rem;color:#526177}.hero-facts span{display:flex;flex-direction:column}.hero-facts b{font-size:1.6rem;line-height:1.3;color:#102c54;letter-spacing:-.04em}
.launch .fine{font-size:.7rem;color:#526177;margin-top:.9rem}
.challenge-stage{position:relative;padding:2.5rem .5rem 2rem;perspective:1000px;min-width:0}
.challenge-card{position:relative;background:#ffffff;color:#102c54;padding:1.7rem;border:1px solid #fff8;border-radius:26px;box-shadow:0 35px 70px #0005;transform:rotate(-3deg);transition:transform .5s,box-shadow .5s;z-index:2}
.challenge-card:hover,.challenge-card:focus-within{transform:rotate(0);box-shadow:0 35px 80px #0007}
.challenge-top{display:flex;justify-content:space-between;align-items:center;font-size:.65rem;color:#526177}.challenge-top .pill{background:#edf2f9;color:#102c54;letter-spacing:.03em;font-size:.6rem}
.challenge-topic{font-size:.6rem;letter-spacing:.12em;font-weight:700;margin-top:1.8rem;color:#526177}
.challenge-formula{font-size:4.5rem;line-height:1.35;letter-spacing:-.07em;font-weight:700}.challenge-formula>span{color:#8b9fba}.challenge-formula .formula-dot{color:#e9ad28}
.challenge-card h2{font-size:1.05rem;line-height:1.5;letter-spacing:-.02em;max-width:27ch}
.challenge-options{display:grid;grid-template-columns:1fr 1fr;gap:.6rem;margin:1.25rem 0 1rem}
.challenge-options button{display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid #d4dfed;border-radius:12px;padding:.75rem .85rem;min-height:48px;font-size:.95rem;font-weight:700;cursor:pointer;transition:transform .2s,background .2s,border-color .2s}
.challenge-options button span{font-size:.65rem;color:#526177;font-weight:500}.challenge-options button:hover{transform:translateY(-3px);border-color:#315784;background:#edf2f9}
.challenge-options .answer-correct{background:#e9ad28;border-color:#15803d}.challenge-options .answer-wrong{background:#fef2f2;border-color:#b91c1c}
#hero-feedback{min-height:2.8em;font-size:.75rem;color:#334155;line-height:1.5}.challenge-bottom{display:flex;justify-content:space-between;gap:1rem;border-top:1px solid #e2e8f0;padding-top:1rem;font-size:.6rem;color:#526177}.challenge-bottom a{font-weight:700;text-decoration:none;font-size:.65rem}
.challenge-solved{box-shadow:0 0 0 4px #e9ad2840,0 35px 70px #0005}
.orbit{position:absolute;inset:-1rem -2rem;border:1px solid #102c5420;border-radius:50%;transform:rotate(-28deg);pointer-events:none}.orbit-a:after{content:"";position:absolute;top:14%;left:14%;width:13px;height:13px;border-radius:50%;background:#e9ad28;box-shadow:0 0 22px #e9ad2850}.orbit-a{animation:orbit-spin 30s linear infinite}.orbit-b{inset:3rem -4rem;transform:rotate(25deg);border-style:dashed;opacity:.45}
.float-chip{position:absolute;z-index:3;padding:.65rem 1rem;border-radius:10px;font-size:.7rem;font-weight:700;box-shadow:0 12px 30px #0002;animation:chip-float 5s ease-in-out infinite}.chip-top{top:.25rem;right:-1rem;background:#edf2f9;color:#102c54;transform:rotate(5deg)}.chip-bottom{bottom:.15rem;left:-1rem;background:#e9ad28;color:#102c54;animation-delay:-2s}.chip-bottom span{font-size:1.2rem;vertical-align:middle;margin-right:.5rem}.stage-spark{position:absolute;top:-2rem;left:0;font-size:4rem;color:#e9ad28;animation:orbit-spin 22s linear infinite}
.launch-footer{display:flex;align-items:center;gap:1.8rem;flex-wrap:wrap;border-top:1px solid #102c5420;padding-block:1.2rem;font-size:.72rem}.launch-footer>span{font-size:.6rem;letter-spacing:.12em;color:#526177;margin-right:auto}.launch-footer a{color:#102c54;text-decoration:none}.launch-footer a:hover{color:#e9ad28}
.momentum-strip{background:#e9ad28;color:#102c54;overflow:hidden;padding:.8rem 0;user-select:none}.momentum-strip>div{width:max-content;font-size:.85rem;font-weight:700;letter-spacing:.1em;word-spacing:.2em;animation:strip-run 34s linear infinite}.momentum-strip span{margin:0 2.5rem}
.quick-heading{padding-top:4rem}.quick-heading h2{margin-top:.7rem}.quick a{position:relative;min-height:240px;padding:1.7rem;transition:transform .3s,box-shadow .3s,border-color .3s}.quick a:hover{transform:translateY(-8px);border-color:#8b9fba;box-shadow:0 20px 40px #102c5410}.quick a:nth-child(2){background:#edf2f9}.quick a:nth-child(3){background:#fff3d6}.quick h3{font-size:1.65rem;line-height:1.2;max-width:16ch}.quick .k{color:#526177;font-size:.65rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:.7rem}.quick .go{margin-top:auto}.quick p{margin-top:.4rem}
.track{transition:transform .3s;position:relative;overflow:hidden}.track:hover{transform:translateY(-5px)}.track h3{font-size:2.2rem}.t2{background:#102c54}.t2 .big{color:#e9ad28}.t1 .big{color:#75500a}.t2 .amb{background:#e9ad28}.chips .chip{transition:transform .2s,background .2s}.chips .chip:hover{transform:translateY(-3px)}
.dark{background:#102c54}.loop{gap:0}.loop li{border-radius:0;border-width:1px 0 0;padding:1.3rem .9rem;transition:background .3s}.loop li:hover{background:#ffffff10}.loop li:before{font-family:var(--sans);font-size:3rem;font-weight:700;color:#e9ad28;letter-spacing:-.08em}.loop .np{color:#f4c65c}
.ccard{transition:transform .35s,box-shadow .35s}.ccard:hover{transform:translateY(-7px);box-shadow:0 20px 35px #102c5415}.ccard .cv svg{transition:transform .5s}.ccard:hover .cv svg{transform:scale(1.06)}.cv{overflow:hidden}.page-h{padding-block:3rem 2rem}.page-h h1{letter-spacing:-.045em}
@keyframes orbit-spin{to{rotate:360deg}}@keyframes chip-float{50%{translate:0 -10px}}@keyframes halo-shift{to{transform:translate(-8%,10%) scale(1.1)}}@keyframes strip-run{to{transform:translateX(-50%)}}
@keyframes entrance-in{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
.hero-copy{animation:entrance-in .7s both}.challenge-stage{animation:entrance-in .85s .12s both}.page-h{animation:entrance-in .4s both}
@media(max-width:1000px){.launch .hero{gap:2.5rem}.launch h1{font-size:4rem}.challenge-card{padding:1.2rem}.float-chip{font-size:.6rem}.launch-footer{gap:1.1rem}}
@media(max-width:880px){.launch .hero{grid-template-columns:1fr;gap:3rem;padding-block:3rem;min-height:0}.launch h1{font-size:clamp(3.4rem,10vw,5.3rem)}.hero-copy{max-width:640px}.challenge-stage{width:100%;max-width:490px;justify-self:center;margin-block:0 1rem}.launch-footer>span{width:100%}.launch-footer{padding-block:1.1rem}.quick a{min-height:200px}.launch .lede{max-width:36rem}.challenge-card{padding:1.6rem}.orbit-b{inset:3rem -1rem}.quick-heading{padding-top:2.5rem}.hero-facts{gap:2rem}}
@media(max-width:520px){.launch .hero{padding-top:2.2rem;gap:2.6rem}.launch h1{font-size:3.55rem}.launch-label{font-size:.55rem;letter-spacing:.1em}.launch .row{gap:.7rem}.launch .row .btn{width:100%;min-height:48px}.challenge-stage{padding-inline:.6rem}.challenge-card{padding:1.2rem;transform:rotate(-2deg)}.chip-top{right:0}.chip-bottom{left:0}.stage-spark{font-size:3rem;top:-1.5rem}.challenge-formula{font-size:4rem}.hero-facts{gap:1.7rem}.hero-facts b{font-size:1.5rem}.launch-footer{gap:.8rem}.launch-footer a{font-size:.7rem}.momentum-strip{padding:.6rem 0}.momentum-strip>div{font-size:.7rem}.challenge-bottom{font-size:.58rem;gap:.3rem}.launch .fine{font-size:.65rem}.loop li{min-width:65%}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.challenge-card{transform:none}.momentum-strip>div{width:auto;white-space:normal;line-height:2;text-align:center}.hero-copy,.challenge-stage,.page-h{opacity:1}}

/* September brand release: preserve the chosen artwork and accessible role colours. */
.brand-logo{display:block;width:232px;height:48px;overflow:hidden;flex:none}
.brand-logo img{display:block;width:270px;height:90px;max-width:none;transform:translate(-20px,-20px)}
.footer-brand{display:inline-flex;background:#fff;border-radius:10px;padding:8px 12px}
.bar{background:#edf2f9;color:var(--f900);border-bottom:1px solid var(--line)}
.bar a{color:var(--f900)}
.launch{background:#f7f9fc;color:var(--ink)}
.launch h1{font-size:clamp(3rem,5.2vw,4.8rem);letter-spacing:-.055em}
.launch h1 em{color:var(--f900);text-decoration:underline;text-decoration-color:var(--am);text-decoration-thickness:.075em;text-underline-offset:.13em}
.launch .pri{background:var(--f900);color:#fff}.launch .pri:hover{background:var(--f700)}
.launch .gho{color:var(--f900);border-color:#b6c6db}
.launch-label span{box-shadow:none}
.challenge-card{box-shadow:0 16px 40px #102c5412;border:1px solid #d4dfed}
.challenge-card:hover,.challenge-card:focus-within{box-shadow:0 20px 48px #102c541c}
.challenge-options .answer-correct{background:var(--ok50);border-color:var(--ok);color:var(--ok)}
.challenge-options .answer-wrong{background:var(--bad50);border-color:var(--bad);color:var(--bad)}
.challenge-solved{outline:3px solid var(--ok50)}
.card{box-shadow:0 2px 8px #102c5405}
.tabs a[aria-current],.mob a[aria-current]{background:#fff3d6;color:var(--f900)}
body[data-page="test"] .page-h{animation:none}
body[data-page="test"] .btn:hover{transform:none;box-shadow:none}
@media(max-width:520px){.launch h1{font-size:clamp(2.7rem,11vw,3.55rem)}.brand-logo{width:210px}.brand-logo img{width:248px;height:auto;transform:translate(-18px,-17px)}}

/* Accessible, case-sensitive wordmark and transparent original-style symbol. */
.brand{gap:9px;letter-spacing:normal}.brand-symbol{display:block;width:48px;height:48px;object-fit:contain;flex:none;transform:translateY(-3px)}.brand-wordmark{font-family:var(--sans);font-size:29px;font-weight:800;letter-spacing:-1.1px;line-height:1;color:#102c54}.footer-brand{background:#fff;padding:8px 12px}
@media(max-width:520px){.brand-symbol{width:42px;height:42px}.brand-wordmark{font-size:26px}.brand{gap:7px}}