/* Ralfiz Academy portal. Base styles from the Academy Labs reference build, then portal additions at the end. */


:root{
  --ground:#F5F6FC;--surface:#FFFFFF;--sunk:#ECEEF8;--ink:#171A33;--muted:#5B6080;--line:#DCDFEF;
  --accent:#5B3FE0;--accent-ink:#FFFFFF;--accent-soft:#ECE8FF;
  /* Brand colours from the Academy app icon: cyan > blue > violet > magenta body, orange swoosh */
  --brand-grad:linear-gradient(135deg,#9EE3FC 0%,#5E86FF 40%,#6A45E6 70%,#D357E3 100%);
  --brand-text:linear-gradient(90deg,#4F6BF5,#6A45E6 55%,#C24BD6);
  --swoosh:linear-gradient(90deg,#FFC23D,#FF8A3D 50%,#F0567A);
  --lab:#95500C;--lab-soft:#F6E8D6;
  --ok:#1D7437;--ok-soft:#E0F1E5;--bad:#B42318;--bad-soft:#FBE5E2;
  --bi:#7A5C00;--bi-strong:#E8B400;--bi-ink:#1E1600;--bi-soft:#F6EDCC;
  --display:"Bricolage Grotesque",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --body:"IBM Plex Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r:10px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --ground:#0E1020;--surface:#161A2E;--sunk:#1D2238;--ink:#E6E8F5;--muted:#9AA0BE;--line:#2A2F4A;
    --accent:#A393FF;--accent-ink:#140C3A;--accent-soft:#262050;
    --brand-text:linear-gradient(90deg,#8FB0FF,#A393FF 55%,#E58AF0);
    --lab:#E5A350;--lab-soft:#33261A;
    --ok:#52C47F;--ok-soft:#14301F;--bad:#F2786C;--bad-soft:#3A1916;
    --bi:#EBC14A;--bi-strong:#EBC14A;--bi-ink:#1E1600;--bi-soft:#2C2510;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --ground:#0E1020;--surface:#161A2E;--sunk:#1D2238;--ink:#E6E8F5;--muted:#9AA0BE;--line:#2A2F4A;
  --accent:#A393FF;--accent-ink:#140C3A;--accent-soft:#262050;
  --brand-text:linear-gradient(90deg,#8FB0FF,#A393FF 55%,#E58AF0);
  --lab:#E5A350;--lab-soft:#33261A;
  --ok:#52C47F;--ok-soft:#14301F;--bad:#F2786C;--bad-soft:#3A1916;
    --bi:#EBC14A;--bi-strong:#EBC14A;--bi-ink:#1E1600;--bi-soft:#2C2510;
}
*{box-sizing:border-box}
body{background:var(--ground);color:var(--ink);font-family:var(--body);font-size:15.5px;line-height:1.6}
button{font:inherit;color:inherit}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
code,.mono{font-family:var(--mono);font-size:.92em}
code{background:var(--sunk);padding:.08em .35em;border-radius:4px}
h1,h2,h3{font-family:var(--display);line-height:1.15;text-wrap:balance;margin:0}

/* Top bar */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:var(--ground);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:14px;padding-block:10px;padding-inline:clamp(16px,3vw,28px)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:var(--display);font-weight:700;font-size:18px;white-space:nowrap}
.brand .labs{color:var(--accent)}
.brand .fx{font-family:var(--mono);font-size:13px;font-weight:500;background:var(--accent);color:var(--accent-ink);border-radius:6px;padding:2px 7px}
.prog{flex:1;display:flex;align-items:center;gap:10px;min-width:0}
.bar{flex:1;height:6px;border-radius:99px;background:var(--sunk);overflow:hidden;max-width:260px}
.bar i{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .3s}
.prog span{font-size:13px;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:8px 14px;cursor:pointer;font-weight:500;font-size:14px;text-decoration:none;color:var(--ink)}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.ghost{background:transparent}
.btn.sm{padding:5px 10px;font-size:13px}
.menu-btn{display:none}

/* Shell */
.shell{display:grid;grid-template-columns:290px minmax(0,1fr);gap:clamp(20px,3vw,40px);padding-inline:clamp(16px,3vw,28px)}
.side{position:sticky;top:calc(env(safe-area-inset-top,0px) + 58px);align-self:start;max-height:calc(100vh - 70px);overflow:auto;padding-block:20px 40px}
.side h4{margin:18px 0 6px;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600;display:flex;justify-content:space-between;gap:8px}
.side h4 b{font-weight:500;font-variant-numeric:tabular-nums;white-space:nowrap}
.side ul{list-style:none;margin:0;padding:0}
.side a{display:flex;gap:10px;align-items:flex-start;padding:6px 8px;border-radius:7px;color:var(--ink);text-decoration:none;font-size:14px;line-height:1.35}
.side a:hover{background:var(--sunk)}
.side a[aria-current="page"]{background:var(--accent-soft);color:var(--ink);font-weight:500}
.side .num{font-family:var(--mono);font-size:12px;color:var(--muted);min-width:28px;padding-top:1px}
.dot{flex:none;width:11px;height:11px;border-radius:50%;border:1.5px solid var(--line);margin-top:4px;margin-left:auto}
.dot.half{border-color:var(--lab);background:linear-gradient(90deg,var(--lab) 50%,transparent 50%)}
.dot.done{border-color:var(--ok);background:var(--ok)}
.side .home-link{font-weight:600}
main{padding-block:28px 80px;min-width:0}
.scrim{display:none}

@media (max-width:900px){
  .shell{grid-template-columns:minmax(0,1fr)}
  .menu-btn{display:inline-flex}
  .side{position:fixed;inset:0 auto 0 0;width:min(320px,86vw);max-height:none;z-index:50;background:var(--surface);border-right:1px solid var(--line);padding:calc(env(safe-area-inset-top,0px) + 16px) 16px calc(env(safe-area-inset-bottom,0px) + 30px);transform:translateX(-102%);transition:transform .22s ease}
  .side.open{transform:none}
  .scrim.open{display:block;position:fixed;inset:0;z-index:40;background:rgba(0,0,0,.35)}
  .prog .bar{display:none}
}
@media (max-width:520px){
  .brand .word{display:none}
  .top-in{gap:10px}
  .test-btn .lbl{display:none}
}

/* Home */
.hero{display:grid;gap:14px;max-width:760px;padding-block:8px 20px}
.eyebrow{font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--accent);font-weight:600}
.hero h1{font-size:clamp(30px,5vw,46px);font-weight:700;letter-spacing:-.01em}
.hero p{margin:0;color:var(--muted);font-size:17px;max-width:62ch}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-block:22px}
.fact{background:var(--surface);padding:14px 16px}
.fact b{display:block;font-family:var(--display);font-size:24px;font-weight:700;font-variant-numeric:tabular-nums}
.fact span{font-size:13px;color:var(--muted)}
@media (max-width:640px){.facts{grid-template-columns:repeat(2,minmax(0,1fr))}}
.how{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-block:10px 30px}
.how div{border-top:2px solid var(--line);padding-top:10px}
.how h3{font-size:17px;margin-bottom:4px}
.how p{margin:0;color:var(--muted);font-size:14px}
.how .l{border-color:var(--accent)} .how .b{border-color:var(--lab)} .how .q{border-color:var(--ink)}
@media (max-width:640px){.how{grid-template-columns:minmax(0,1fr)}}
.section-title{font-size:22px;margin:30px 0 14px}
.domains{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.dcard{display:grid;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--ink)}
.dcard:hover{border-color:var(--accent)}
.dcard .w{font-family:var(--mono);font-size:12.5px;color:var(--muted)}
.dcard h3{font-size:18px}
.dcard .meta{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.mini{height:4px;border-radius:99px;background:var(--sunk);overflow:hidden}
.mini i{display:block;height:100%;background:var(--accent)}
.note{font-size:13.5px;color:var(--muted);max-width:70ch;margin-top:26px}

/* Lesson */
.lesson-head{display:grid;gap:8px;max-width:760px;margin-bottom:18px}
.lesson-head h1{font-size:clamp(26px,4vw,36px);font-weight:700}
.lesson-head .sub{display:flex;flex-wrap:wrap;gap:8px 16px;color:var(--muted);font-size:13.5px}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:22px;overflow-x:auto}
.tab{border:0;background:none;padding:10px 14px;cursor:pointer;font-weight:500;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px;display:flex;align-items:center;gap:8px;white-space:nowrap}
.tab[aria-selected="true"]{color:var(--ink);border-color:var(--accent)}
.tab .ck{font-size:12px;color:var(--ok)}
.prose{max-width:68ch}
.prose p{margin:0 0 14px}
.prose ul,.prose ol{margin:0 0 14px;padding-left:22px}
.prose li{margin-bottom:6px}
.terms{max-width:68ch;margin:22px 0;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
/* Long-form lesson content */
.glance{max-width:72ch;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 18px 2px;margin-bottom:22px}
.glance-h{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:8px;flex-wrap:wrap}
.glance .rt{font-size:13px;color:var(--muted)}
.glance .prose{font-size:14.5px}
.toc{max-width:72ch;margin:0 0 26px;font-size:14px}
.toc span{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
.toc ol{list-style:none;padding:0;margin:8px 0 0;display:flex;flex-wrap:wrap;gap:6px}
.toc a{display:inline-block;border:1px solid var(--line);border-radius:99px;padding:4px 12px;text-decoration:none;color:var(--ink);background:var(--surface)}
.toc a:hover{border-color:var(--accent)}
.deep{font-size:16px;line-height:1.7}
.deep h3{font-size:22px;font-weight:700;margin:38px 0 12px;scroll-margin-top:80px}
.deep h3:first-child{margin-top:4px}
.deep strong{font-weight:600}
.deep table{border-collapse:collapse;width:100%;font-size:14.5px;line-height:1.5;margin:4px 0 18px;display:block;overflow-x:auto}
.deep table thead{background:var(--sunk)}
.deep th,.deep td{border:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top;min-width:120px}
.deep th{font-weight:600}
.deep .example{background:var(--lab-soft);border-radius:var(--r);padding:4px 20px 6px;margin:26px 0}
.deep .example h3{color:var(--lab);font-size:19px;margin-top:16px}
.deep .example table{background:var(--surface)}
.deep .callout{border-left:3px solid var(--accent);background:var(--accent-soft);padding:10px 16px;border-radius:0 8px 8px 0;margin:0 0 16px;font-size:15px}
.deep .callout.warn{border-color:var(--bad);background:var(--bad-soft)}
.deep pre.code{font-family:var(--mono);font-size:13.5px;background:var(--sunk);border-radius:8px;padding:12px 14px;overflow-x:auto;line-height:1.55;margin:0 0 16px;white-space:pre}
.deep ol li::marker{color:var(--muted);font-variant-numeric:tabular-nums}
.terms h3{font-size:14px;letter-spacing:.06em;text-transform:uppercase;font-family:var(--body);font-weight:600;color:var(--muted);padding:12px 16px 0}
.terms dl{margin:0;padding:6px 16px 12px;display:grid;grid-template-columns:minmax(110px,auto) 1fr;gap:8px 16px}
.terms dt{font-weight:600}
.terms dd{margin:0;color:var(--muted)}
@media (max-width:560px){.terms dl{grid-template-columns:minmax(0,1fr)}.terms dd{margin-bottom:6px}}
.tip{max-width:68ch;display:flex;gap:12px;background:var(--accent-soft);border-radius:var(--r);padding:12px 16px;font-size:14.5px}
.tip b{white-space:nowrap}
.lab-intro{max-width:68ch;color:var(--muted);margin:0 0 16px}
.steps{list-style:none;padding:0;margin:0 0 20px;max-width:72ch;display:grid;gap:8px}
.steps label{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;cursor:pointer}
.steps input{margin-top:4px;width:17px;height:17px;accent-color:var(--lab);flex:none}
.steps .t{min-width:0;overflow-wrap:anywhere}
.prose,.deep,.q .stem,.opt,.terms dd{overflow-wrap:break-word;min-width:0}
.steps .n{font-family:var(--mono);font-size:12px;color:var(--lab);min-width:18px;padding-top:3px}
.steps label:has(input:checked){background:var(--lab-soft);border-color:transparent}
.steps label:has(input:checked) .t{color:var(--muted)}
.labdone{max-width:72ch;background:var(--ok-soft);color:var(--ok);border-radius:var(--r);padding:10px 14px;font-weight:500}
.q{max-width:72ch;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;margin-bottom:14px}
.q .qn{font-family:var(--mono);font-size:12px;color:var(--muted)}
.q p.stem{margin:4px 0 12px;font-weight:500}
.opts{display:grid;gap:8px}
.opt{text-align:left;border:1px solid var(--line);background:var(--ground);border-radius:8px;padding:10px 12px;cursor:pointer;display:flex;gap:10px;line-height:1.45}
.opt:hover:not([disabled]){border-color:var(--accent)}
.opt .k{font-family:var(--mono);font-size:12.5px;color:var(--muted);padding-top:1px}
.opt[disabled]{cursor:default}
.opt.right{background:var(--ok-soft);border-color:var(--ok)}
.opt.wrong{background:var(--bad-soft);border-color:var(--bad)}
.why{margin-top:10px;font-size:14px;color:var(--muted)}
.why b.ok{color:var(--ok)} .why b.no{color:var(--bad)}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:36px;max-width:760px;flex-wrap:wrap}
.pager .btn{max-width:100%}
.pager .btn span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Power Fx console */
.console{max-width:760px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);overflow:hidden;margin-bottom:26px}
.console-head{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.console-head h3{font-size:17px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--ground);border-radius:99px;padding:3px 11px;font-size:13px;cursor:pointer;font-family:var(--mono)}
.chip[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.chip.solved{border-color:var(--ok)}
.goal{padding:14px 16px 4px;font-weight:500}
.fxbar{display:flex;align-items:stretch;margin:10px 16px;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--ground)}
.fxbar .lbl{font-family:var(--mono);font-style:italic;font-weight:500;color:var(--accent);padding:10px 12px;border-right:1px solid var(--line);background:var(--sunk)}
.fxbar input{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);font-family:var(--mono);font-size:14.5px;padding:10px 12px}
.fxbar input:focus{outline:none}
.fxbar:focus-within{border-color:var(--accent)}
.fx-actions{display:flex;gap:8px;flex-wrap:wrap;padding:0 16px 12px}
.out{margin:0 16px 14px;border-radius:8px;padding:10px 12px;background:var(--sunk);font-family:var(--mono);font-size:13.5px;overflow-x:auto;min-height:44px}
.out .lab{font-family:var(--body);font-size:12px;color:var(--muted);display:block;margin-bottom:2px}
.out.ok{background:var(--ok-soft)} .out.err{background:var(--bad-soft);color:var(--bad)}
.verdict{padding:0 16px 14px;font-size:14px}
.verdict.ok{color:var(--ok);font-weight:600} .verdict.no{color:var(--bad)}
details.data{border-top:1px solid var(--line)}
details.data summary{padding:10px 16px;cursor:pointer;font-size:14px;color:var(--muted)}
.tw{overflow-x:auto;padding:0 16px 14px}
table.t{border-collapse:collapse;font-size:13px;min-width:100%}
table.t th,table.t td{border-bottom:1px solid var(--line);padding:6px 10px;text-align:left;white-space:nowrap}
table.t th{font-weight:600;color:var(--muted)}
table.t td.nm{font-variant-numeric:tabular-nums;text-align:right}

/* Flow builder */
.fb-body{padding:14px 16px;display:grid;gap:14px}
.fb-scn{background:var(--lab-soft);border-radius:8px;padding:10px 12px;font-weight:500}
.fb-body label.fl{font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);font-weight:600;display:block;margin-bottom:6px}
.fb-body select{width:100%;padding:9px 10px;border-radius:8px;border:1px solid var(--line);background:var(--ground);color:var(--ink);font:inherit}
.palette{display:flex;flex-wrap:wrap;gap:6px}
.pal{border:1px dashed var(--line);background:var(--ground);border-radius:8px;padding:6px 10px;font-size:13px;cursor:pointer;text-align:left}
.pal:hover{border-color:var(--accent);border-style:solid}
.pal small{display:block;font-size:11px;color:var(--muted)}
.canvas{display:grid;gap:0;justify-items:center;padding:12px;border-radius:8px;background:var(--sunk)}
.node{width:min(360px,100%);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:8px 10px;display:flex;align-items:center;gap:10px;font-size:13.5px}
.node .tag{font-family:var(--mono);font-size:11px;padding:1px 6px;border-radius:4px;background:var(--accent-soft);color:var(--accent);white-space:nowrap}
.node.trig .tag{background:var(--lab-soft);color:var(--lab)}
.node .x{margin-left:auto;border:0;background:none;cursor:pointer;color:var(--muted);font-size:16px;line-height:1;padding:2px 6px}
.node .body{min-width:0}
.node .body small{display:block;color:var(--muted);font-size:11.5px}
.conn{width:2px;height:16px;background:var(--line)}
.empty{font-size:13px;color:var(--muted);padding:6px}

/* Test */
.test-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;max-width:760px;margin-bottom:20px}
.score{max-width:760px;display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;margin-bottom:20px}
.score b{font-family:var(--display);font-size:44px;line-height:1;font-variant-numeric:tabular-nums}
.score.pass b{color:var(--ok)} .score.fail b{color:var(--bad)}
.score p{margin:0;color:var(--muted)}
.q.review .opt{cursor:default}
.q .src{font-size:12.5px;margin-top:8px}


/* Power BI add-on */
.addon-sep{margin:26px 0 4px;padding:10px 8px 0;border-top:1px solid var(--line);font-size:13px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:8px}
.addon-sep span{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;background:var(--bi-strong);color:var(--bi-ink);border-radius:4px;padding:1px 6px}
.eyebrow.bi{color:var(--bi)}
.pbi{white-space:nowrap}
@media (max-width:520px){.pbi{display:none}}
.addon-home{margin-top:40px;padding-top:26px;border-top:1px solid var(--line)}
.addon-intro{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:24px;align-items:start;margin-bottom:18px}
.addon-intro p{color:var(--muted);margin:0 0 14px;max-width:62ch}
@media (max-width:760px){.addon-intro{grid-template-columns:minmax(0,1fr)}}
.bi-facts{margin:0;display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.bi-facts div{background:var(--surface);padding:9px 14px;display:flex;justify-content:space-between;gap:12px;font-size:14px}
.bi-facts dt{color:var(--muted)} .bi-facts dd{margin:0;font-weight:500;text-align:right}
.btn.bi-btn{background:var(--bi-strong);border-color:var(--bi-strong);color:var(--bi-ink)}
.dcard.bi{border-top:3px solid var(--bi-strong)}
.dcard.bi .mini i{background:var(--bi-strong)}
.tmode{display:inline-flex;gap:2px;background:var(--sunk);border-radius:9px;padding:3px;margin-bottom:14px}
.tmode a{padding:6px 14px;border-radius:7px;text-decoration:none;color:var(--muted);font-size:14px;font-weight:500}
.tmode a[aria-selected="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.dsf{display:grid;gap:8px}
.dsf-h{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.dsf-h span{display:block;font-size:13px;color:var(--muted)}
.dsf textarea{width:100%;font-family:var(--mono);font-size:12.5px;line-height:1.5;border:1px solid var(--line);border-radius:8px;background:var(--ground);color:var(--ink);padding:10px;resize:vertical;white-space:pre;overflow:auto}
.slicers{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;padding:12px 16px;background:var(--bi-soft);border-bottom:1px solid var(--line);font-size:14px}
.slicers .sl-lab{font-size:11.5px;letter-spacing:.07em;text-transform:uppercase;font-weight:600;color:var(--bi)}
.slicers label{display:flex;align-items:center;gap:8px}
.slicers select,.ss-sel select{padding:6px 8px;border-radius:7px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;font-size:14px}
.dax .fxbar .lbl{font-style:normal;color:var(--bi);white-space:nowrap}
.cardvis{margin:0 16px 12px;border:1px solid var(--line);border-radius:8px;padding:14px 16px;display:grid;gap:2px;background:var(--surface)}
.cardvis .cv-val{font-family:var(--display);font-size:34px;font-weight:700;line-height:1.1;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.cardvis .cv-lab{font-size:12.5px;color:var(--muted)}
.cardvis.ok{border-color:var(--ok);background:var(--ok-soft)}
.cardvis.err{border-color:var(--bad);background:var(--bad-soft)} .cardvis.err .cv-val{color:var(--bad);font-size:22px}
.fl2{font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);font-weight:600;display:block;margin-bottom:8px}
.ss-tables{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:8px}
.ss-t{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:var(--ground)}
.ss-t.fact{border-color:var(--bi-strong)} .ss-t.dim{border-color:var(--accent)}
.ss-t small{display:block;font-size:12.5px;color:var(--muted);line-height:1.45;margin-top:2px}
.ss-t small.ssw,.ss-r small.ssw{color:var(--bad)}
.seg{display:inline-flex;flex:none;border:1px solid var(--line);border-radius:7px;overflow:hidden}
.seg button{border:0;background:var(--surface);padding:5px 9px;font-size:12.5px;cursor:pointer}
.seg button+button{border-left:1px solid var(--line)}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--ground)}
.ss-rels{display:grid;gap:8px}
.ss-r{border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:var(--ground);display:grid;gap:8px}
.ss-path{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;font-size:13.5px}
.ss-sel{display:flex;flex-wrap:wrap;gap:6px}
.mk{font-weight:700;margin-left:6px} .mk.ok{color:var(--ok)} .mk.no{color:var(--bad)}

@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}


/* ===== Multi-track shell ===== */
:root{--t-pl900:#0B7A6E;--t-ab410:#6A4BC4;--t-pl300:#B08500;--t-ab400:#2D5FBF;--t-flutter:#C2410C;--t-js:#A15C07;--t-dom:#B4235A;--t-net1:#0E7490;--t-net2:#4338CA}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--t-pl900:#3CC4B2;--t-ab410:#A993F0;--t-pl300:#EBC14A;--t-ab400:#7FA6F2;--t-flutter:#F59E6B;--t-js:#F2C14E;--t-dom:#F58BB3;--t-net1:#5CCBE0;--t-net2:#9DA4F5}}
:root[data-theme="dark"]{--t-pl900:#3CC4B2;--t-ab410:#A993F0;--t-pl300:#EBC14A;--t-ab400:#7FA6F2;--t-flutter:#F59E6B;--t-js:#F2C14E;--t-dom:#F58BB3;--t-net1:#5CCBE0;--t-net2:#9DA4F5}
body{--tc:var(--t-pl900)}
body[data-track="ab410"]{--tc:var(--t-ab410)} body[data-track="pl300"]{--tc:var(--t-pl300)} body[data-track="ab400"]{--tc:var(--t-ab400)} body[data-track="flutter"]{--tc:var(--t-flutter)} body[data-track="js"]{--tc:var(--t-js)} body[data-track="dom"]{--tc:var(--t-dom)} body[data-track="net1"]{--tc:var(--t-net1)} body[data-track="net2"]{--tc:var(--t-net2)}
.lesson-head .eyebrow,.test-head .eyebrow,.hero .eyebrow{color:var(--tc)}
.all-tracks{display:block;font-size:13.5px;color:var(--muted);text-decoration:none;padding:4px 8px;margin-bottom:6px}
.all-tracks:hover{color:var(--ink)}
.tsw{display:grid;gap:4px;padding:0 8px 10px;margin-bottom:6px;border-bottom:1px solid var(--line)}
.tsw span{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
.tsw select{width:100%;padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;font-size:14px;border-left:4px solid var(--tc)}
.cat-hero h1{max-width:18ch}
.path{list-style:none;padding:0;margin:0 0 8px;display:flex;align-items:stretch;gap:10px;flex-wrap:wrap}
.path li{display:flex;gap:8px;flex-direction:column;position:relative}
.path li.fork{flex-direction:column}
.path li:not(:last-child)::after{content:"→";position:absolute;right:-9px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:14px}
.path li:not(:last-child){padding-right:14px}
.path a{display:grid;gap:1px;text-decoration:none;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:9px;padding:9px 14px;min-width:120px}
.path a:hover{border-color:var(--accent)}
.path b{font-family:var(--mono);font-size:14px}
.path span{font-size:12.5px;color:var(--muted)}
.path a[data-t="pl900"]{border-left:4px solid var(--t-pl900)} .path a[data-t="ab410"]{border-left:4px solid var(--t-ab410)} .path a[data-t="pl300"]{border-left:4px solid var(--t-pl300)} .path a[data-t="ab400"]{border-left:4px solid var(--t-ab400)} .path a[data-t="flutter"]{border-left:4px solid var(--t-flutter)} .path a[data-t="js"]{border-left:4px solid var(--t-js)} .path a[data-t="dom"]{border-left:4px solid var(--t-dom)} .path a[data-t="net1"]{border-left:4px solid var(--t-net1)} .path a[data-t="net2"]{border-left:4px solid var(--t-net2)}
.tracks{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px}
.tcard{--c:var(--t-pl900);display:grid;gap:10px;align-content:start;background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--c);border-radius:var(--r);padding:18px;text-decoration:none;color:var(--ink)}
.tcard[data-t="ab410"]{--c:var(--t-ab410)} .tcard[data-t="pl300"]{--c:var(--t-pl300)} .tcard[data-t="ab400"]{--c:var(--t-ab400)} .tcard[data-t="flutter"]{--c:var(--t-flutter)} .tcard[data-t="js"]{--c:var(--t-js)} .tcard[data-t="dom"]{--c:var(--t-dom)} .tcard[data-t="net1"]{--c:var(--t-net1)} .tcard[data-t="net2"]{--c:var(--t-net2)}
.tcard:hover{border-color:var(--c)}
.tc-top{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.tc-code{font-family:var(--display);font-weight:700;font-size:28px;color:var(--c);letter-spacing:-.01em}
.tc-lvl{font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);font-weight:600}
.tcard h3{font-size:19px}
.tcard p{margin:0;color:var(--muted);font-size:14px}
.tc-meta{margin:0;display:grid;gap:4px;font-size:13px}
.tc-meta div{display:flex;justify-content:space-between;gap:10px;border-bottom:1px dashed var(--line);padding-bottom:3px}
.tc-meta dt{color:var(--muted)} .tc-meta dd{margin:0;text-align:right;font-weight:500}
.tcard .mini i{background:var(--c)}
.tc-foot{display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}
.tc-go{color:var(--c);font-weight:600}
/* Exercise files */
.exfiles{max-width:820px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);margin-bottom:24px;overflow:hidden}
.exh{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);flex-wrap:wrap;background:var(--lab-soft)}
.exh h3{font-size:17px}
.exh span{font-size:13px;color:var(--muted)}
.exmsg{margin:0;padding:8px 16px;font-size:13.5px;background:var(--bad-soft);color:var(--bad)}
.flist{list-style:none;margin:0;padding:0}
.flist>li{border-bottom:1px solid var(--line)}
.flist>li:last-child{border-bottom:0}
.frow{display:flex;align-items:center;gap:12px;padding:10px 16px;flex-wrap:wrap}
.fext{flex:none;font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.03em;border:1px solid var(--line);border-radius:5px;padding:3px 6px;min-width:44px;text-align:center;color:var(--lab);background:var(--ground)}
.fname{flex:1 1 220px;min-width:0;display:grid;gap:1px}
.fname strong{font-size:13.5px;overflow-wrap:anywhere}
.fname span{font-size:12.5px;color:var(--muted)}
.fbtns{display:flex;gap:6px;flex-wrap:wrap}
.fview{margin:0 16px 12px;max-height:340px;overflow:auto;background:var(--sunk);border-radius:8px;padding:10px 12px;font-family:var(--mono);font-size:12.5px;line-height:1.5;white-space:pre}
.lab-h{font-size:18px;margin:6px 0 4px}
.checkyw{max-width:72ch;border:1px solid var(--ok);background:var(--ok-soft);border-radius:var(--r);padding:12px 16px 4px;margin:0 0 16px}
.checkyw h3{font-size:16px;color:var(--ok);margin-bottom:6px}
.checkyw ul{margin:0 0 8px;padding-left:20px}
.checkyw li{margin-bottom:4px;overflow-wrap:anywhere}
.checkyw,.exfiles,.steps .t,.lab-intro{min-width:0;overflow-wrap:anywhere}
/* Sorter */
.sort-list{list-style:decimal;margin:0;padding-left:22px;display:grid;gap:10px}
.sort-i{border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:var(--ground);display:grid;gap:8px}
.sort-i p{margin:0}
.sort-i select{max-width:100%;padding:7px 9px;border-radius:7px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;font-size:14px}
.sort-i small{font-size:13px}
.sort-i.ok{border-color:var(--ok)} .sort-i.ok small{color:var(--ok)}
.sort-i.no{border-color:var(--bad)} .sort-i.no small{color:var(--bad)}
.opt.sel{border-color:var(--accent);background:var(--accent-soft)}
@media (max-width:520px){.path{flex-direction:column}.path li:not(:last-child)::after{content:"↓";right:auto;left:50%;top:auto;bottom:-14px;transform:none}.path li:not(:last-child){padding-right:0;padding-bottom:14px}}

.side .tprog{margin-left:auto;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;padding-top:1px}
.side a .num{min-width:52px}
body[data-track="home"]{--tc:var(--accent)}

/* ===== Portal additions ===== */
html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100vh;overflow-x:hidden}
.top-in{max-width:1440px;margin-inline:auto}
.top-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.top-nav a.nl{padding:6px 10px;border-radius:7px;text-decoration:none;color:var(--muted);font-size:14px;font-weight:500;white-space:nowrap}
.top-nav a.nl:hover,.top-nav a.nl[aria-current="page"]{color:var(--ink);background:var(--sunk)}
.brand-mark{width:32px;height:32px;border-radius:8px;display:block;flex:none;object-fit:cover}
.who{position:relative}
.who>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:8px;padding:4px 6px 4px 4px;border-radius:99px;border:1px solid var(--line);background:var(--surface)}
.who>summary::-webkit-details-marker{display:none}
.avatar{width:28px;height:28px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:700;font-size:13px}
.who .wn{font-size:13.5px;font-weight:500;max-width:14ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.who-menu{position:absolute;right:0;top:calc(100% + 6px);min-width:200px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:0 10px 30px rgba(0,0,0,.12);padding:6px;z-index:60}
.who-menu a,.who-menu button{display:block;width:100%;text-align:left;padding:8px 10px;border-radius:7px;border:0;background:none;color:var(--ink);text-decoration:none;font-size:14px;cursor:pointer}
.who-menu a:hover,.who-menu button:hover{background:var(--sunk)}
.who-menu .wm-h{padding:6px 10px 8px;border-bottom:1px solid var(--line);margin-bottom:4px;font-size:12.5px;color:var(--muted)}
.who-menu .wm-h b{display:block;color:var(--ink);font-size:14px}
@media (max-width:640px){.who .wn,.top-nav a.nl,.prog{display:none}}
.shell.solo{grid-template-columns:minmax(0,1fr);max-width:1180px;margin-inline:auto}
.shell{max-width:1440px;margin-inline:auto}
.preview-bar{background:var(--lab-soft);color:var(--lab);font-size:13.5px;text-align:center;padding:6px 16px}
.preview-bar a{color:inherit;font-weight:600}
.flash{max-width:760px;margin:0 0 16px;padding:10px 14px;border-radius:var(--r);background:var(--ok-soft);color:var(--ok);font-size:14.5px}
.flash.error{background:var(--bad-soft);color:var(--bad)}
.theme-btn{border:1px solid var(--line);background:var(--surface);border-radius:8px;width:34px;height:34px;display:grid;place-items:center;cursor:pointer;color:var(--muted)}
.theme-btn:hover{color:var(--ink)}

/* Dashboard */
.welcome{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:18px;align-items:stretch;margin:4px 0 22px}
@media (max-width:860px){.welcome{grid-template-columns:minmax(0,1fr)}}
.welcome h1{font-size:clamp(28px,4.5vw,40px);font-weight:700;letter-spacing:-.01em}
.welcome .hero{padding:0}
.resume{--c:var(--accent);display:grid;gap:10px;align-content:start;background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--c);border-radius:var(--r);padding:16px 18px;text-decoration:none;color:var(--ink)}
.resume:hover{border-color:var(--c)}
.resume .eyebrow{color:var(--c)}
.resume h3{font-size:19px}
.resume .rs{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.resume .go{color:var(--c);font-weight:600}
.resume[data-t="ab410"],.tcard[data-t="ab410"]{--c:var(--t-ab410)}
.resume[data-t="pl300"]{--c:var(--t-pl300)} .resume[data-t="ab400"]{--c:var(--t-ab400)} .resume[data-t="pl900"]{--c:var(--t-pl900)} .resume[data-t="flutter"]{--c:var(--t-flutter)} .resume[data-t="js"]{--c:var(--t-js)} .resume[data-t="dom"]{--c:var(--t-dom)} .resume[data-t="net1"]{--c:var(--t-net1)} .resume[data-t="net2"]{--c:var(--t-net2)}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-bottom:8px}
.stat{background:var(--surface);padding:14px 16px;display:grid;gap:2px}
.stat b{font-family:var(--display);font-size:26px;font-weight:700;font-variant-numeric:tabular-nums;line-height:1.1}
.stat span{font-size:13px;color:var(--muted)}
.stat .ring{display:flex;align-items:center;gap:12px}
@media (max-width:700px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
.tcard.locked{opacity:.72;border-top-color:var(--line);cursor:default}
.tcard.locked:hover{border-color:var(--line)}
.lock-note{font-size:13px;color:var(--muted);display:flex;gap:6px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;border-radius:99px;padding:2px 10px;background:var(--sunk);color:var(--muted);white-space:nowrap}
.badge.ok{background:var(--ok-soft);color:var(--ok)} .badge.no{background:var(--bad-soft);color:var(--bad)} .badge.lab{background:var(--lab-soft);color:var(--lab)}
.grid2{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:18px;align-items:start}
@media (max-width:900px){.grid2{grid-template-columns:minmax(0,1fr)}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.panel>h3{font-size:16px;padding:12px 16px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.panel>h3 small{font-family:var(--body);font-weight:400;font-size:13px;color:var(--muted)}
.panel .empty-p{padding:16px;color:var(--muted);font-size:14px;margin:0}
.rows{list-style:none;margin:0;padding:0}
.rows li{border-bottom:1px solid var(--line)}
.rows li:last-child{border-bottom:0}
.rows a,.rows .r{display:flex;align-items:center;gap:12px;padding:10px 16px;text-decoration:none;color:var(--ink);font-size:14px}
.rows a:hover{background:var(--sunk)}
.rows .sc{font-family:var(--display);font-weight:700;font-size:20px;font-variant-numeric:tabular-nums;min-width:52px}
.rows .sc.ok{color:var(--ok)} .rows .sc.no{color:var(--bad)}
.rows .meta{margin-left:auto;font-size:12.5px;color:var(--muted);text-align:right;white-space:nowrap}
.rows .grow{min-width:0;flex:1;overflow:hidden;text-overflow:ellipsis}
.rows small{display:block;color:var(--muted);font-size:12.5px}

/* Track page lesson list */
.dblock{margin-bottom:22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;max-width:900px}
.dblock-h{display:flex;justify-content:space-between;gap:12px;padding:14px 16px;border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:flex-start}
.dblock-h h3{font-size:18px}
.dblock-h p{margin:4px 0 0;color:var(--muted);font-size:14px;max-width:60ch}
.dblock-h .w{font-family:var(--mono);font-size:12.5px;color:var(--muted);white-space:nowrap}
.dblock .mini{margin:0 16px 0;border-radius:0}
.llist{list-style:none;margin:0;padding:0}
.llist li+li{border-top:1px solid var(--line)}
.llist a{display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:12px;align-items:center;padding:11px 16px;text-decoration:none;color:var(--ink)}
.llist a:hover{background:var(--sunk)}
.llist .num{font-family:var(--mono);font-size:12.5px;color:var(--muted)}
.llist .lt{font-weight:500;line-height:1.35}
.llist .lt small{display:block;font-weight:400;font-size:12.5px;color:var(--muted);margin-top:2px}
.llist .dot{margin:0}
.cert{max-width:900px;display:flex;gap:14px;align-items:center;padding:14px 16px;border-radius:var(--r);border:1px dashed var(--line);margin:0 0 22px;background:var(--surface)}
.cert.ok{border-style:solid;border-color:var(--ok);background:var(--ok-soft)}
.cert .ci{font-size:26px}
.cert p{margin:2px 0 0;font-size:14px;color:var(--muted)}

/* Tests */
table.hist{width:100%;border-collapse:collapse;font-size:14px}
table.hist th,table.hist td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left}
table.hist th{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:600}
table.hist td.n{font-variant-numeric:tabular-nums}
.choose{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;max-width:760px;margin-bottom:24px}
.choose button{display:grid;gap:4px;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px;cursor:pointer}
.choose button:hover{border-color:var(--tc)}
.choose b{font-family:var(--display);font-size:26px}
.choose span{color:var(--muted);font-size:14px}
.submit-bar{position:sticky;bottom:0;z-index:20;display:flex;gap:12px;align-items:center;flex-wrap:wrap;max-width:760px;background:var(--ground);border-top:1px solid var(--line);padding:12px 0 calc(12px + env(safe-area-inset-bottom,0px))}
.qnav{display:flex;flex-wrap:wrap;gap:4px;max-width:760px;margin-bottom:18px}
.qnav a{width:32px;height:28px;display:grid;place-items:center;border:1px solid var(--line);border-radius:6px;font-family:var(--mono);font-size:12px;text-decoration:none;color:var(--muted);background:var(--surface)}
.qnav a.on{background:var(--accent-soft);border-color:var(--accent);color:var(--ink)}
.q{scroll-margin-top:80px}

/* Login */
.login-wrap{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr)}
@media (max-width:860px){.login-wrap{grid-template-columns:minmax(0,1fr)}.login-art{display:none!important}}
.login-art{background:var(--ink);color:var(--ground);padding:clamp(28px,5vw,64px);display:flex;flex-direction:column;justify-content:space-between;gap:30px}
.login-art h1{font-size:clamp(32px,4vw,48px);font-weight:700;max-width:14ch}
.login-art p{color:color-mix(in srgb,var(--ground) 75%,transparent);max-width:46ch;font-size:16px}
.login-art .codes{display:flex;gap:8px;flex-wrap:wrap}
.login-art .codes span{font-family:var(--mono);font-size:13px;border:1px solid color-mix(in srgb,var(--ground) 30%,transparent);border-radius:99px;padding:4px 12px}
.login-form{display:grid;place-items:center;padding:32px 16px}
.login-form form{width:min(380px,100%);display:grid;gap:14px}
.login-form h2{font-size:26px}
.field{display:grid;gap:6px}
.field label{font-size:13px;font-weight:600;color:var(--muted)}
.field input,.field select,.field textarea{width:100%;padding:11px 12px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:inherit}
.field input:focus{outline:2px solid var(--accent);outline-offset:0;border-color:var(--accent)}
.field .err{font-size:13px;color:var(--bad)}
.field .help{font-size:12.5px;color:var(--muted)}
.btn.block{justify-content:center;width:100%;padding:11px 14px;font-size:15px}
.form-card{max-width:480px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;display:grid;gap:14px}

/* ===================================================================
   v2 portal shell (dashboard / track / lesson redesign, Sep 2026)
   =================================================================== */
:root{--r2:14px;--mint:#E8EAFF;--mint-2:#F3F2FF;--shadow:0 1px 2px rgba(30,24,80,.04),0 6px 18px rgba(30,24,80,.05);
  --tone-teal:#ECE8FF;--tone-teal-i:#5B3FE0;--tone-violet:#ECE7FB;--tone-violet-i:#6A4BC4;
  --tone-amber:#FBEFD9;--tone-amber-i:#B26A00;--tone-blue:#E2ECFB;--tone-blue-i:#2D5FBF}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--mint:#1F1D48;--mint-2:#1A1C38;--shadow:none;
  --tone-teal:#262050;--tone-teal-i:#A393FF;--tone-violet:#241D3A;--tone-violet-i:#A993F0;--tone-amber:#33261A;--tone-amber-i:#E5A350;--tone-blue:#162338;--tone-blue-i:#7FA6F2}}
:root[data-theme="dark"]{--mint:#1F1D48;--mint-2:#1A1C38;--shadow:none;
  --tone-teal:#262050;--tone-teal-i:#A393FF;--tone-violet:#241D3A;--tone-violet-i:#A993F0;--tone-amber:#33261A;--tone-amber-i:#E5A350;--tone-blue:#162338;--tone-blue-i:#7FA6F2}

.tile{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;flex:none;font-size:18px;background:var(--tone-teal);color:var(--tone-teal-i)}
.tile.sm{width:36px;height:36px;border-radius:10px;font-size:15px}
.tile.lg{width:56px;height:56px;border-radius:14px;font-size:24px}
.tile.violet{background:var(--tone-violet);color:var(--tone-violet-i)} .tile.amber{background:var(--tone-amber);color:var(--tone-amber-i)}
.tile.blue{background:var(--tone-blue);color:var(--tone-blue-i)} .tile.plain{background:var(--sunk);color:var(--muted)}
.card2{background:var(--surface);border:1px solid var(--line);border-radius:var(--r2);box-shadow:var(--shadow)}
.pill{display:inline-flex;align-items:center;gap:6px;border-radius:99px;padding:3px 11px;font-size:12px;font-weight:600;background:var(--sunk);color:var(--muted);white-space:nowrap}
.pill.teal{background:var(--tone-teal);color:var(--tone-teal-i)} .pill.ok{background:var(--ok-soft);color:var(--ok)} .pill.lab{background:var(--lab-soft);color:var(--lab)}
.pbar{height:6px;border-radius:99px;background:var(--sunk);overflow:hidden}
.pbar i{display:block;height:100%;border-radius:99px;background:var(--c,var(--accent))}
.btn2{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:10px;padding:12px 20px;font:inherit;font-weight:600;font-size:15px;background:var(--accent);color:var(--accent-ink);text-decoration:none;cursor:pointer;transition:filter .15s}
.btn2:hover{filter:brightness(1.08)}
.btn2.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.btn2.ghost:hover{border-color:var(--accent);filter:none}
.btn2.sq{padding:0;width:44px;height:44px;background:var(--accent-soft);color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 25%,transparent)}
[data-t="pl900"]{--c:var(--t-pl900)} [data-t="ab410"]{--c:var(--t-ab410)} [data-t="pl300"]{--c:var(--t-pl300)} [data-t="ab400"]{--c:var(--t-ab400)} [data-t="flutter"]{--c:var(--t-flutter)} [data-t="js"]{--c:var(--t-js)} [data-t="dom"]{--c:var(--t-dom)} [data-t="net1"]{--c:var(--t-net1)} [data-t="net2"]{--c:var(--t-net2)}
body[data-track="pl900"]{--c:var(--t-pl900)} body[data-track="ab410"]{--c:var(--t-ab410)} body[data-track="pl300"]{--c:var(--t-pl300)} body[data-track="ab400"]{--c:var(--t-ab400)} body[data-track="flutter"]{--c:var(--t-flutter)} body[data-track="js"]{--c:var(--t-js)} body[data-track="dom"]{--c:var(--t-dom)} body[data-track="net1"]{--c:var(--t-net1)} body[data-track="net2"]{--c:var(--t-net2)}
.sec-h{display:flex;justify-content:space-between;align-items:flex-end;gap:14px;flex-wrap:wrap;margin:34px 0 16px}
.sec-h h2{font-size:24px}
.sec-h p{margin:4px 0 0;color:var(--muted);font-size:14.5px}

/* Top bar */
.top2{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top2-in{max-width:1480px;margin:0 auto;display:flex;align-items:center;gap:16px;padding:10px clamp(16px,2.5vw,32px);min-height:64px}
.top2 .brand{font-size:19px}
.mainnav{display:flex;gap:4px;margin:0 auto}
.mainnav a{display:flex;align-items:center;gap:9px;padding:9px 16px;border-radius:10px;text-decoration:none;color:var(--muted);font-weight:500;font-size:14.5px;white-space:nowrap}
.mainnav a i{font-size:15px}
.mainnav a:hover{color:var(--ink);background:var(--sunk)}
.mainnav a[aria-current="page"]{color:var(--accent);background:var(--tone-teal);font-weight:600}
.top2-right{display:flex;align-items:center;gap:10px}
.themeseg{display:inline-flex;border:1px solid var(--line);border-radius:99px;padding:3px;background:var(--surface)}
.themeseg button{border:0;background:none;width:30px;height:28px;border-radius:99px;cursor:pointer;color:var(--muted);display:grid;place-items:center;font-size:13px}
.themeseg button[aria-pressed="true"]{background:var(--sunk);color:var(--ink)}
.who>summary{border:0;background:none;padding:4px}
.who .avatar{width:34px;height:34px;font-size:14px}
.who .wn{font-weight:600;font-size:14.5px}
.who .chev{font-size:11px;color:var(--muted)}
.menu-btn2{display:none;border:1px solid var(--line);background:var(--surface);border-radius:10px;width:40px;height:40px;cursor:pointer;color:var(--ink)}
.botnav{display:none}
@media (max-width:1100px){.mainnav a span{display:none}.mainnav a{padding:10px 12px}}
@media (max-width:760px){
  .mainnav{display:none}
  .top2-in{min-height:56px}
  .who .wn,.who .chev,.themeseg{display:none}
  .botnav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:45;background:var(--surface);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px))}
  .botnav a{display:grid;justify-items:center;gap:3px;padding:6px 2px;text-decoration:none;color:var(--muted);font-size:11px;font-weight:500}
  .botnav a i{font-size:17px}
  .botnav a[aria-current="page"]{color:var(--accent)}
  body{padding-bottom:70px}
}

/* Shell grid */
.wrap2{max-width:1480px;margin:0 auto;padding:22px clamp(16px,2.5vw,32px) 80px}
.shell2{max-width:1480px;margin:0 auto;display:grid;grid-template-columns:300px minmax(0,1fr);gap:28px;padding:0 clamp(16px,2.5vw,32px)}
.shell2.rail{grid-template-columns:300px minmax(0,1fr) 300px}
.shell2 main{padding:22px 0 80px;min-width:0}
.rail2{position:sticky;top:84px;align-self:start;padding:22px 0 40px;display:grid;gap:16px}
@media (max-width:1240px){.shell2.rail{grid-template-columns:300px minmax(0,1fr)}.rail2{display:none}}
@media (max-width:960px){
  .shell2,.shell2.rail{grid-template-columns:minmax(0,1fr)}
  .menu-btn2{display:grid;place-items:center}
}

/* Course outline sidebar */
.side2{position:sticky;top:64px;align-self:start;min-height:calc(100vh - 64px);padding:22px 14px 40px 0;border-right:1px solid var(--line)}
.side2 .back{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:500;font-size:14.5px;padding:4px 6px;margin-bottom:16px}
.side2 .lbl{font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;color:var(--muted);margin:0 6px 8px}
.tsel{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--surface);position:relative;margin-bottom:12px}
.tsel .tile{width:34px;height:34px;font-size:15px;background:color-mix(in srgb,var(--c) 14%,var(--surface));color:var(--c)}
.tsel b{display:block;font-size:14.5px}
.tsel small{display:block;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:170px}
.tsel select{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%}
.tsel .fa-chevron-down{margin-left:auto;color:var(--muted);font-size:12px}
.snav{list-style:none;margin:0 0 18px;padding:0;display:grid;gap:2px}
.snav a{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:10px;text-decoration:none;color:var(--ink);font-size:14.5px;position:relative}
.snav a i{width:18px;text-align:center;color:var(--muted)}
.snav a:hover{background:var(--sunk)}
.snav a[aria-current="page"]{background:var(--tone-teal);font-weight:600}
.snav a[aria-current="page"]::before{content:"";position:absolute;left:-14px;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--accent)}
.outline{display:grid;gap:4px}
.odom{border-top:1px solid var(--line)}
.odom:first-child{border-top:0}
.odom>summary{list-style:none;display:flex;align-items:center;gap:12px;padding:12px 6px;cursor:pointer;border-radius:10px}
.odom>summary::-webkit-details-marker{display:none}
.odom>summary:hover{background:var(--sunk)}
.odom>summary .tile{width:36px;height:36px;border-radius:50%;font-size:13px;background:var(--surface);border:1px solid var(--line);color:var(--muted);font-family:var(--mono);font-weight:600}
.odom.full>summary .tile{background:var(--ok-soft);border-color:transparent;color:var(--ok)}
.odom>summary b{display:block;font-size:14px;line-height:1.3}
.odom>summary small{display:block;color:var(--muted);font-size:12.5px;margin-top:1px}
.odom>summary .fa-chevron-down{margin-left:auto;font-size:11px;color:var(--muted);transition:transform .2s}
.odom[open]>summary .fa-chevron-down{transform:rotate(180deg)}
.olist{list-style:none;margin:0 0 10px;padding:0 0 0 8px}
.olist a{display:grid;grid-template-columns:34px minmax(0,1fr) 14px;gap:8px;align-items:start;padding:7px 8px;border-radius:9px;text-decoration:none;color:var(--ink);font-size:13.5px;line-height:1.35}
.olist a:hover{background:var(--sunk)}
.olist a[aria-current="page"]{background:var(--tone-teal);font-weight:600}
.olist .n{font-family:var(--mono);font-size:12px;color:var(--muted);padding-top:1px}
.olist .dot{margin-top:2px;width:12px;height:12px}
.olist .dot.done{width:16px;height:16px;margin-top:0;display:grid;place-items:center}
.olist .dot.done::after{content:"\f00c";font-family:"Font Awesome 6 Free";font-weight:900;font-size:8px;color:#fff}
@media (max-width:960px){
  .side2{position:fixed;inset:0 auto 0 0;z-index:60;width:min(330px,88vw);max-height:none;min-height:0;overflow:auto;top:0 !important;background:var(--surface);padding:18px 16px 30px;transform:translateX(-102%);transition:transform .22s ease;border-right:1px solid var(--line)}
  .side2.open{transform:none}
}

/* Hero cards */
.hero2{position:relative;overflow:hidden;border-radius:18px;background:linear-gradient(135deg,var(--mint) 0%,var(--mint-2) 70%);border:1px solid color-mix(in srgb,var(--accent) 12%,transparent);padding:clamp(22px,3vw,40px)}
.hero2::after{content:"";position:absolute;right:-60px;top:-80px;width:340px;height:340px;border-radius:50%;background:color-mix(in srgb,var(--accent) 7%,transparent);pointer-events:none}
.hero2 h1{font-size:clamp(28px,3.4vw,44px);font-weight:700;letter-spacing:-.015em;line-height:1.1}
.hero2 p.sub{margin:10px 0 0;color:var(--muted);font-size:16px;max-width:58ch;line-height:1.55}
.hero2 .eyebrow{color:var(--accent)}
.hero2 .hz{position:relative;z-index:1}
.dash-top{display:grid;grid-template-columns:minmax(0,2.1fr) minmax(300px,1fr);gap:20px;align-items:stretch}
.dash-hero{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(220px,.9fr);gap:24px;align-items:center}
.dash-hero .btn2{margin-top:22px}
.deco-card{position:relative;z-index:1;justify-self:end;width:min(260px,100%);background:#1B1740;color:#ECEBFA;border-radius:14px;padding:18px 18px 16px;box-shadow:0 18px 40px rgba(30,24,80,.25);transform:rotate(-2deg)}
.deco-card h4{margin:0 0 12px;font-family:var(--display);font-size:15px}
.deco-card ul{list-style:none;margin:0 0 12px;padding:0;display:grid;gap:9px;font-size:14px}
.deco-card li{display:flex;gap:10px;align-items:center}
.deco-card li i{width:20px;height:20px;border-radius:6px;display:grid;place-items:center;background:#6A45E6;font-size:11px}
.deco-card li.todo{opacity:.6} .deco-card li.todo i{background:transparent;border:1.5px solid rgba(236,235,250,.4)}
.deco-card .pbar{background:rgba(236,235,250,.14)} .deco-card .pbar i{background:var(--swoosh)}
.deco-badge{position:absolute;right:-12px;top:-18px;width:48px;height:48px;border-radius:14px;background:#fff;color:#5B3FE0;display:grid;place-items:center;font-size:20px;box-shadow:0 8px 20px rgba(0,0,0,.15);transform:rotate(8deg)}
@media (max-width:1100px){.dash-top{grid-template-columns:minmax(0,1fr)}}
@media (max-width:700px){.dash-hero{grid-template-columns:minmax(0,1fr)}.deco-card{display:none}}
.next2{--c:var(--accent);display:flex;flex-direction:column;gap:10px;padding:24px;background:linear-gradient(180deg,#FFFBF1,var(--surface) 60%);border-radius:18px}
:root[data-theme="dark"] .next2{background:var(--surface)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .next2{background:var(--surface)}}
.next2 .eyebrow{display:flex;align-items:center;gap:8px;color:var(--accent)}
.next2 h3{font-size:22px;line-height:1.2}
.next2 .meta{display:flex;flex-wrap:wrap;gap:6px 18px;color:var(--muted);font-size:14px}
.next2 .meta i{margin-right:6px}
.next2 .btn2{margin-top:auto;width:100%}

/* Stat cards */
.stats2{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:20px}
.stat2{display:grid;grid-template-columns:auto minmax(0,1fr);gap:6px 16px;align-items:center;padding:18px 20px}
.stat2 .tile{grid-row:span 2;width:52px;height:52px;border-radius:14px;font-size:21px}
.stat2 b{font-family:var(--display);font-size:26px;font-weight:700;line-height:1;font-variant-numeric:tabular-nums}
.stat2 b small{font-size:15px;color:var(--muted);font-weight:600}
.stat2 span.l{color:var(--muted);font-size:14px}
.stat2 .row{grid-column:1/-1;display:flex;align-items:center;gap:12px;font-size:13px;color:var(--muted);margin-top:6px}
.stat2 .row .pbar{flex:1}
@media (max-width:1100px){.stats2{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.stats2{grid-template-columns:minmax(0,1fr)}}

/* Filter chips */
.fchips{display:flex;gap:8px;flex-wrap:wrap}
.fchips button{border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:9px 16px;font:inherit;font-size:14px;font-weight:500;cursor:pointer;color:var(--ink)}
.fchips button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}

/* Course cards */
.cgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:18px}
.ccard{display:flex;flex-direction:column;gap:12px;padding:20px;border-top:3px solid var(--c);background:linear-gradient(180deg,color-mix(in srgb,var(--c) 5%,var(--surface)),var(--surface) 45%)}
.ccard .h{display:flex;justify-content:space-between;gap:12px}
.ccard .code{font-family:var(--display);font-weight:700;font-size:24px;color:var(--c);letter-spacing:-.01em;white-space:nowrap}
.ccard .lvl{display:inline-block;white-space:nowrap;font-size:10.5px;letter-spacing:.07em;text-transform:uppercase;font-weight:700;border-radius:6px;padding:3px 8px;background:color-mix(in srgb,var(--c) 12%,transparent);color:var(--c);margin-left:10px;vertical-align:4px}
.ccard .glyph{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:24px;color:var(--c);background:color-mix(in srgb,var(--c) 12%,var(--surface));flex:none}
.ccard h3{font-size:18px;margin-top:6px}
.ccard p{margin:0;color:var(--muted);font-size:14px;line-height:1.55}
.cmeta{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:auto;padding-top:6px}
.cmeta div{display:flex;gap:8px;align-items:flex-start;font-size:13.5px;font-weight:600;line-height:1.2}
.cmeta i{color:var(--c);margin-top:2px}
.cmeta small{display:block;color:var(--muted);font-weight:400;font-size:12px;margin-top:2px}
.cmeta .live{width:8px;height:8px;border-radius:50%;background:#16a34a;margin-top:5px;flex:none}
.cprog{display:grid;gap:8px}
.cprog .t{display:flex;justify-content:space-between;font-size:13.5px;color:var(--muted)}
.cfoot{display:flex;gap:10px}
.cfoot .btn2:first-child{flex:1}
.ccard.locked{border-top-color:var(--line);background:var(--surface);opacity:.75}
.ccard.locked .code,.ccard.locked .glyph{filter:grayscale(.6)}
.ccard[hidden]{display:none}

/* Track page */
.trk-top{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(300px,1fr);gap:20px}
.trk-hero{display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:20px;align-items:center}
.trk-hero .code-pill{display:inline-block;font-family:var(--mono);font-weight:600;font-size:13px;border-radius:8px;padding:4px 10px;background:color-mix(in srgb,var(--c) 14%,var(--surface));color:var(--c);margin-bottom:12px}
.trk-hero .prog{display:grid;gap:8px;margin-top:22px;max-width:380px}
.trk-hero .prog .t{display:flex;justify-content:space-between;font-size:14px;color:var(--ink)}
.orbit{position:relative;width:200px;height:200px;justify-self:end}
.orbit::before{content:"";position:absolute;inset:24px;border-radius:50%;border:1.5px dashed color-mix(in srgb,var(--c) 30%,transparent)}
.orbit .core{position:absolute;inset:62px;border-radius:24px;display:grid;place-items:center;font-size:34px;color:#fff;background:var(--c);box-shadow:0 14px 30px color-mix(in srgb,var(--c) 40%,transparent)}
.orbit .sat{position:absolute;width:46px;height:46px;border-radius:13px;background:var(--surface);display:grid;place-items:center;box-shadow:0 8px 20px rgba(0,0,0,.08);font-size:18px}
.orbit .s1{top:4px;left:26px;color:var(--tone-violet-i)} .orbit .s2{top:14px;right:10px;color:var(--tone-blue-i)}
.orbit .s3{bottom:18px;right:4px;color:var(--tone-amber-i)} .orbit .s4{bottom:4px;left:40px;color:var(--tone-teal-i)}
.facts2{display:grid;grid-template-columns:1fr 1fr;gap:22px 18px;padding:24px;align-content:center}
.facts2 div{display:flex;gap:12px;align-items:flex-start}
.facts2 b{display:block;font-family:var(--display);font-size:20px;line-height:1.15}
.facts2 span{display:block;color:var(--muted);font-size:13px;margin-top:3px;line-height:1.35}
@media (max-width:1100px){.trk-top{grid-template-columns:minmax(0,1fr)}}
@media (max-width:640px){.trk-hero{grid-template-columns:minmax(0,1fr)}.orbit{display:none}.facts2{grid-template-columns:minmax(0,1fr)}}
.pbanner{display:flex;align-items:center;gap:16px;padding:16px 20px;margin-top:18px;background:linear-gradient(90deg,#FFF8EB,var(--surface));flex-wrap:wrap}
:root[data-theme="dark"] .pbanner{background:var(--surface)}
.pbanner.done{background:var(--ok-soft)}
.pbanner b{font-size:16px}
.pbanner p{margin:3px 0 0;color:var(--muted);font-size:14px}
.pbanner .btn2{margin-left:auto}
.how2{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:18px}
.how2>div{display:flex;gap:16px;align-items:flex-start;padding:20px}
.how2 .tile{width:52px;height:52px;border-radius:14px;font-size:21px}
.how2 h3{font-size:17px;margin-bottom:4px}
.how2 p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}
.how2 .l{background:linear-gradient(135deg,var(--tone-teal) -40%,var(--surface) 55%)}
.how2 .b{background:linear-gradient(135deg,var(--tone-violet) -40%,var(--surface) 55%)}
.how2 .q{background:linear-gradient(135deg,var(--tone-blue) -40%,var(--surface) 55%)}
@media (max-width:900px){.how2{grid-template-columns:minmax(0,1fr)}}
.acc{display:grid;gap:14px}
.accd{overflow:hidden}
.accd>summary{list-style:none;display:flex;align-items:center;gap:16px;padding:18px 20px;cursor:pointer}
.accd>summary::-webkit-details-marker{display:none}
.accd .num{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-family:var(--display);background:var(--tone-teal);color:var(--tone-teal-i);flex:none}
.accd.full .num{background:var(--ok-soft);color:var(--ok)}
.accd>summary h3{font-size:17px}
.accd>summary p{margin:3px 0 0;color:var(--muted);font-size:14px}
.accd>summary .m{margin-left:auto;color:var(--muted);font-size:13.5px;white-space:nowrap;text-align:right}
.accd>summary .m .w{display:block;font-family:var(--mono);font-size:12px}
.accd>summary .fa-chevron-down{color:var(--muted);transition:transform .2s;font-size:13px}
.accd[open]>summary .fa-chevron-down{transform:rotate(180deg)}
.accd .lrows{list-style:none;margin:0;padding:0 20px 10px}
.accd .lrows a{display:grid;grid-template-columns:36px 44px minmax(0,1fr) auto 16px;gap:10px;align-items:center;padding:12px 4px;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}
.accd .lrows a:hover{background:var(--mint-2)}
.accd .lrows .tile{width:34px;height:34px;border-radius:9px;font-size:14px}
.accd .lrows .n{font-family:var(--mono);color:var(--muted);font-size:13.5px}
.accd .lrows b{font-weight:500;display:block}
.accd .lrows small{display:block;color:var(--muted);font-size:12.5px;margin-top:2px}
.accd .lrows .fa-chevron-right{color:var(--muted);font-size:12px}
@media (max-width:640px){.accd>summary .m{display:none}.accd .lrows a{grid-template-columns:30px minmax(0,1fr) auto 12px}.accd .lrows .n{display:none}}

/* Lesson page */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--ink)}
.crumbs i{font-size:10px}
.les-hero{display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:20px;align-items:center}
.les-hero .lpill{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;border-radius:8px;padding:5px 10px;background:color-mix(in srgb,var(--accent) 14%,var(--surface));color:var(--accent);margin-bottom:12px}
.les-meta{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:16px;color:var(--muted);font-size:14px}
.les-meta i{margin-right:6px}
.les-meta b{color:var(--ink)}
.les-art{position:relative;height:150px}
.les-art .screen{position:absolute;inset:14px 0 26px 10px;border-radius:12px;background:#1B1740;border:6px solid #2A2560;display:grid;grid-template-columns:repeat(2,1fr);gap:8px;padding:14px}
.les-art .screen span{border-radius:8px;display:grid;place-items:center;font-size:18px;color:#fff}
.les-art .screen span:nth-child(1){background:#6A4BC4} .les-art .screen span:nth-child(2){background:#2D5FBF}
.les-art .screen span:nth-child(3){background:#B08500} .les-art .screen span:nth-child(4){background:#0B7A6E}
.les-art .base{position:absolute;left:-6px;right:-14px;bottom:14px;height:12px;border-radius:0 0 12px 12px;background:linear-gradient(180deg,#E4E0FA,#C9C2F0);box-shadow:0 10px 18px rgba(30,24,80,.12)}
.les-art .screen{z-index:1;box-shadow:0 14px 30px rgba(30,24,80,.25)}
.les-art .dots{position:absolute;right:-18px;top:-26px;width:54px;height:80px;background:radial-gradient(circle,color-mix(in srgb,var(--accent) 45%,transparent) 1.6px,transparent 2px) 0 0/13px 13px}
.les-art .orb{position:absolute;border-radius:50%}
.les-art .o1{width:22px;height:22px;left:4px;top:-12px;background:color-mix(in srgb,var(--accent) 45%,var(--surface));z-index:2}
.les-art .o2{width:46px;height:46px;right:-30px;top:44px;background:color-mix(in srgb,var(--accent) 22%,var(--surface))}
@media (max-width:760px){.les-hero{grid-template-columns:minmax(0,1fr)}.les-art{display:none}}
.tabs2{display:flex;gap:6px;border-bottom:1px solid var(--line);margin:22px 0 22px;background:var(--surface);border-radius:12px 12px 0 0;padding:0 8px;overflow-x:auto}
.tabs2 button{display:flex;align-items:center;gap:9px;border:0;background:none;font:inherit;font-weight:600;font-size:15px;color:var(--muted);padding:14px 16px;border-bottom:3px solid transparent;margin-bottom:-1px;cursor:pointer;white-space:nowrap}
.tabs2 button[aria-selected="true"]{color:var(--ink);border-color:var(--accent)}
.tabs2 .ck{color:var(--ok);font-size:12px}
.glance2{padding:22px 24px;margin-bottom:26px}
.glance2 .gh{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.glance2 .gh h2{font-size:20px}
.glance2 .gh .rt{margin-left:auto;color:var(--muted);font-size:13.5px}
.glance2 .prose{max-width:none;font-size:15px}
.glance2 .prose ul,.glance2 .prose ol{padding-left:20px}
.lesson-body{padding:26px clamp(18px,3vw,36px) 30px}
.lesson-body .deep{max-width:74ch}
.deep h3{position:relative;padding-left:16px}
.deep h3::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:3px;background:var(--accent)}
.deep .example h3{padding-left:0} .deep .example h3::before{display:none}
.deep .callout{border-left-width:4px;border-radius:0 12px 12px 0;padding:12px 18px}
.deep .example{border-radius:14px}
.rail2 .card2{padding:18px 18px}
.rail2 h4{display:flex;align-items:center;gap:10px;margin:0 0 12px;font-family:var(--display);font-size:16px}
.rail2 h4 .v{margin-left:auto;font-family:var(--body);font-size:13.5px;font-weight:600;color:var(--muted)}
.rtoc{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.rtoc a{display:block;padding:6px 12px;margin-left:-2px;border-left:2px solid transparent;color:var(--muted);text-decoration:none;font-size:14px;line-height:1.35}
.rtoc a:hover{color:var(--ink)}
.rtoc a.on{color:var(--accent);border-color:var(--accent);font-weight:600;background:var(--tone-teal);border-radius:0 8px 8px 0}
.rchk{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:10px}
.rchk li{display:flex;align-items:center;gap:12px;font-size:14px}
.rchk .c{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;font-size:10px;flex:none;color:transparent}
.rchk li.on .c{background:var(--ok);border-color:var(--ok);color:#fff}
.rchk li.on span{color:var(--muted)}
.rnote{margin:14px 0 0;font-size:12.5px;color:var(--muted);background:var(--sunk);border-radius:10px;padding:10px 12px}
.rnext{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink)}
.rnext b{display:block;font-size:14px;line-height:1.3}
.rnext small{color:var(--muted);font-size:12.5px}
.rhelp p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.5}
.rhelp .rask{width:100%;margin-top:12px}
.exf2{margin-bottom:24px;overflow:hidden}
.exf2 .eh{display:flex;align-items:center;gap:16px;padding:18px 20px;background:linear-gradient(90deg,#FFF3E0,#FFF9EF);flex-wrap:wrap}
:root[data-theme="dark"] .exf2 .eh{background:var(--lab-soft)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .exf2 .eh,:root:not([data-theme="light"]) .pbanner,:root:not([data-theme="light"]) .next2{background:var(--lab-soft)}}
.exf2 .eh h3{font-size:18px}
.exf2 .eh p{margin:3px 0 0;color:var(--muted);font-size:13.5px}
.exf2 .eh .btn2{margin-left:auto;padding:10px 16px}
.exf2 .flist .frow{padding:14px 20px}
.exf2 .fbtns .btn{gap:6px}
.steps-h{display:flex;align-items:center;gap:14px;margin:6px 0 14px;flex-wrap:wrap}
.steps-h h3{font-size:20px}
.steps-h p{margin:2px 0 0;color:var(--muted);font-size:14px}
.steps-h .pill{margin-left:auto;padding:6px 14px;font-size:13px}
.steps2{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:8px}
.steps2 label{display:grid;grid-template-columns:32px minmax(0,1fr);gap:14px;align-items:start;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;cursor:pointer;transition:background .15s,border-color .15s}
.steps2 label:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
.steps2 input{position:absolute;opacity:0;pointer-events:none}
.steps2 .box{width:30px;height:30px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;font-family:var(--mono);font-size:13px;color:var(--muted);background:var(--surface)}
.steps2 input:focus-visible+.box{outline:2px solid var(--accent);outline-offset:2px}
.steps2 input:checked+.box{background:var(--ok);border-color:var(--ok);color:#fff;font-size:0}
.steps2 input:checked+.box::after{content:"\2713";font-size:14px;font-family:var(--body)}
.steps2 b{display:block;font-weight:600;line-height:1.4}
.steps2 small{display:block;color:var(--muted);font-size:14px;margin-top:3px;line-height:1.45}
.steps2 label:has(input:checked){background:var(--ok-soft);border-color:transparent}
.steps2 label:has(input:checked) b{color:var(--muted)}
.tabpanel .console,.tabpanel .exfiles,.tabpanel .q,.tabpanel .checkyw{max-width:none}
@media (min-width:1241px){#inlineToc{display:none}}
@media (max-width:960px){.scrim.open{display:block;position:fixed;inset:0;z-index:55;background:rgba(0,0,0,.35)}}
.deep h3,.q,#lab-files,#lab-steps,#lab-check,#widget,#terms{scroll-margin-top:84px}
.facts2 span.tile{display:grid;margin-top:0;color:var(--tone-teal-i)}
.facts2 span.tile.violet{color:var(--tone-violet-i)} .facts2 span.tile.amber{color:var(--tone-amber-i)} .facts2 span.tile.blue{color:var(--tone-blue-i)}
.trk-hero h1{font-size:clamp(26px,2.6vw,38px)}
.trk-hero p.sub{font-size:15px}
.les-hero h1{font-size:clamp(26px,2.8vw,40px)}
.steps-h>div{flex:1;min-width:220px}
.top2-right{margin-left:auto} .mainnav+.top2-right{margin-left:0} @media (max-width:760px){.top2 .brand .word{display:inline}}
@media (max-width:760px){.mainnav+.top2-right{margin-left:auto}}
/* Tab bar: scroll sideways on narrow screens only; never a vertical scrollbar. */
.tabs2{overflow-x:auto;overflow-y:hidden;scrollbar-width:none}
.tabs2::-webkit-scrollbar{display:none}
.tabs2 button{margin-bottom:0}
.tabs2 button:focus-visible{outline-offset:-3px}

/* Shared form fields (login, profile) */
.lg-field{display:grid;gap:8px}
.lg-field label{font-size:14px;font-weight:600;color:var(--ink)}
.lg-input{display:flex;align-items:center;border:1.5px solid var(--line);border-radius:10px;background:var(--surface);transition:border-color .15s,box-shadow .15s}
.lg-input:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.lg-input>svg{width:20px;height:20px;margin-left:14px;color:var(--muted);flex:none}
.lg-input input{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);font:inherit;font-size:15.5px;padding:14px 12px}
.lg-input input:focus{outline:none}
.lg-eye{border:0;background:none;padding:0 14px;height:100%;cursor:pointer;color:var(--muted);display:grid;place-items:center}
.lg-eye:hover{color:var(--ink)}
.lg-eye svg{width:20px;height:20px}
.lg-input>i{margin-left:14px;color:var(--muted);font-size:15px;flex:none}
.lg-eye i{font-size:16px}

/* Profile */
.pf-top{display:grid;grid-template-columns:minmax(0,2.3fr) minmax(280px,1fr);gap:20px;align-items:stretch}
.pf-hero{display:grid;grid-template-columns:minmax(0,1fr) 260px;align-items:center;padding-block:28px}
.pf-id{display:flex;gap:26px;align-items:center}
.pf-av{width:112px;height:112px;border-radius:50%;flex:none;display:grid;place-items:center;font-family:var(--display);font-size:44px;font-weight:700;color:var(--accent);background:var(--surface);box-shadow:0 0 0 8px color-mix(in srgb,var(--accent) 10%,transparent)}
.pf-id h1{font-size:clamp(26px,3vw,38px);margin:6px 0 10px}
.pf-mail{margin:0 0 4px;color:var(--muted);font-size:15px;display:flex;align-items:center;gap:10px}
.pf-art{position:relative;height:170px}
.pf-art .c1,.pf-art .c2{position:absolute;border-radius:50%;background:color-mix(in srgb,var(--accent) 10%,transparent)}
.pf-art .c1{width:180px;height:180px;right:30px;top:-5px} .pf-art .c2{width:110px;height:110px;right:0;bottom:-10px}
.pf-art .cap{position:absolute;right:62px;top:30px;width:110px;height:110px;border-radius:30px;background:var(--brand-grad);color:#fff;display:grid;place-items:center;font-size:52px;transform:rotate(-8deg);box-shadow:0 18px 40px rgba(30,24,80,.25)}
.pf-motto{display:flex;gap:16px;align-items:center;padding:24px}
.pf-motto b{display:block;font-family:var(--display);font-size:20px;line-height:1.2}
.pf-motto b.g{color:var(--accent)}
.pf-motto p{margin:8px 0 0;color:var(--muted);font-size:14px}
.pf-grid{display:grid;grid-template-columns:minmax(0,2.3fr) minmax(300px,1fr);gap:20px;margin-top:20px;align-items:start}
.pf-courses{padding:22px}
.pf-h{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.pf-h h2{font-size:21px}
.pf-row{display:grid;grid-template-columns:64px minmax(0,1fr) 250px auto;gap:18px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:16px;margin-top:12px}
.pf-row .glyph{width:64px;height:64px;border-radius:16px;display:grid;place-items:center;font-size:28px;color:var(--c);background:color-mix(in srgb,var(--c) 12%,var(--surface))}
.pf-name{min-width:0;display:grid;gap:2px}
.pf-name .mono{font-size:12.5px;color:var(--muted)}
.pf-name b{font-size:17px}
.pf-name small{color:var(--muted);font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pf-prog{display:grid;gap:8px}
.pf-prog .t{display:flex;align-items:center;gap:10px}
.pf-prog .pbar{flex:1;height:8px}
.pf-prog .t b{font-size:13.5px;min-width:38px;text-align:right}
.pf-prog small{color:var(--muted);font-size:12.5px;white-space:nowrap}
.pf-prog small i{margin-right:4px}
.pf-go{background:var(--accent-soft);color:var(--accent);padding:10px 18px;font-size:14px}
.pf-go:hover{background:var(--accent);color:var(--accent-ink);filter:none}
.pf-side{display:grid;gap:20px}
.pf-card{padding:20px;display:grid;gap:14px}
.pf-ch{display:flex;gap:12px;align-items:flex-start}
.pf-ch b{display:block;font-size:16px}
.pf-ch small{color:var(--muted);font-size:13px}
.pf-err{color:var(--bad);font-size:13px}
.pf-rules{list-style:none;margin:0;padding:12px 14px;background:var(--tone-teal);border-radius:10px;display:grid;gap:6px;font-size:13px;color:var(--muted)}
.pf-rules li i{width:16px;color:var(--line)}
.pf-rules li.ok{color:var(--ink)} .pf-rules li.ok i{color:var(--ok)}
.pf-rules li.info{font-size:12px} .pf-rules li.info i{color:var(--muted)}
.pf-act>summary,.pf-act-link{list-style:none;display:flex;align-items:center;gap:14px;padding:13px 4px;border-top:1px solid var(--line);cursor:pointer;color:var(--ink);text-decoration:none;font-size:14.5px}
.pf-act>summary::-webkit-details-marker{display:none}
.pf-act>summary i:first-child,.pf-act-link i:first-child{width:18px;color:var(--muted)}
.pf-act .chev,.pf-act-link .chev{margin-left:auto;font-size:12px;color:var(--muted);transition:transform .2s}
.pf-act[open] .chev{transform:rotate(90deg)}
.pf-edit{display:grid;gap:12px;padding:4px 4px 16px}
.pf-edit .btn2{justify-self:start;padding:10px 18px;font-size:14px}
@media (max-width:1100px){.pf-top,.pf-grid{grid-template-columns:minmax(0,1fr)}}
@media (max-width:760px){
  .pf-hero{grid-template-columns:minmax(0,1fr)} .pf-art{display:none}
  .pf-id{flex-direction:column;align-items:flex-start;gap:16px} .pf-av{width:80px;height:80px;font-size:32px}
  .pf-row{grid-template-columns:52px minmax(0,1fr)} .pf-row .glyph{width:52px;height:52px;font-size:22px}
  .pf-prog,.pf-go{grid-column:1/-1} .pf-go{justify-self:start}
}
@media (max-width:760px){.pf-motto{display:none}}

/* Dashboard: practice tests + learning path panels */
.dash-low{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:20px;margin-top:30px;align-items:start}
@media (max-width:1100px){.dash-low{grid-template-columns:minmax(0,1fr)}}
.dpanel{padding:20px 22px}
.dp-h{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.dp-h .tile{width:48px;height:48px;border-radius:50%;font-size:20px}
.dp-h h2{font-size:19px}
.dp-h p{margin:3px 0 0;color:var(--muted);font-size:13.5px}
.dp-h .btn2{margin-left:auto;white-space:nowrap}
.btn2.soft{background:var(--tone-teal);color:var(--accent);padding:9px 14px;font-size:13.5px}
.btn2.soft:hover{background:var(--accent);color:var(--accent-ink);filter:none}
.btn2.out{background:var(--surface);color:var(--accent);border:1.5px solid color-mix(in srgb,var(--accent) 45%,var(--line));padding:6px 14px;font-size:13px;border-radius:8px}
.btn2.out:hover{background:var(--accent);color:var(--accent-ink);filter:none}
.dp-table{overflow-x:auto;margin:0 -4px}
.dp-table table{width:100%;border-collapse:collapse;font-size:14px}
.dp-table th{text-align:left;font-size:12.5px;font-weight:600;color:var(--muted);background:var(--sunk);padding:10px 12px;white-space:nowrap}
.dp-table th:first-child{border-radius:8px 0 0 8px} .dp-table th:last-child{border-radius:0 8px 8px 0}
.dp-table td{padding:9px 12px;border-bottom:1px solid var(--line);white-space:nowrap}
.dp-table tr:last-child td{border-bottom:0}
.dp-table .tn{display:inline-flex;align-items:center;gap:10px;font-weight:500}
.dp-table .tn i{color:var(--c);font-size:15px}
.dp-table td.mut{color:var(--muted)}
.dp-table td.mut a{color:var(--accent)}
.dp-table form{margin:0}
.dp-note{margin:14px 0 0;display:flex;gap:10px;align-items:center;background:var(--tone-teal);border-radius:10px;padding:11px 14px;font-size:13px;color:var(--muted)}
.dp-note i{color:var(--accent)}
.lpath{list-style:none;margin:0;padding:0;position:relative}
.lpath::before{content:"";position:absolute;left:15px;top:20px;bottom:20px;width:2px;background:var(--line)}
.lpath li{position:relative;display:grid;grid-template-columns:32px minmax(0,1fr);gap:12px;align-items:center;padding:6px 0}
.lpath .step{position:relative;z-index:1;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:14px;color:#fff;background:var(--c);box-shadow:0 0 0 4px var(--surface)}
.lpath li.locked .step{background:var(--surface);color:var(--muted);border:1.5px solid var(--line)}
.lp-row{display:grid;grid-template-columns:48px minmax(0,1fr) auto 12px;gap:14px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:10px 14px;text-decoration:none;color:var(--ink);background:var(--surface)}
a.lp-row:hover{border-color:var(--c)}
.lp-row .glyph{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;font-size:21px;color:var(--c);background:color-mix(in srgb,var(--c) 12%,var(--surface))}
.lp-t{min-width:0}
.lp-t b{display:block;font-size:14.5px;font-weight:600}
.lp-t b .c{font-family:var(--mono);margin-right:6px}
.lp-t small{display:block;color:var(--muted);font-size:13px;margin-top:2px}
.lp-s{font-size:12.5px;font-weight:600;border-radius:8px;padding:6px 10px;white-space:nowrap;background:var(--sunk);color:var(--muted)}
.lp-s.in_progress{background:var(--tone-teal);color:var(--accent)}
.lp-s.completed{background:var(--ok-soft);color:var(--ok)}
.lp-row .chev{color:var(--muted);font-size:12px}
.lpath li.locked .lp-row{opacity:.72}
.lpath li.locked .chev{visibility:hidden}
@media (max-width:560px){.lp-row{grid-template-columns:40px minmax(0,1fr);gap:10px}.lp-row .glyph{width:40px;height:40px;font-size:17px}.lp-s{grid-column:2;justify-self:start}.lp-row .chev{display:none}.dp-h{flex-wrap:wrap}.dp-h .btn2{margin-left:0}}
.dp-table .btn2.out{line-height:1.2;min-height:0;height:auto;padding:7px 14px}

/* Locks */
.olock{display:grid;grid-template-columns:34px minmax(0,1fr) 14px;gap:8px;align-items:start;padding:7px 8px;font-size:13.5px;line-height:1.35;color:var(--muted);cursor:not-allowed}
.olock .n{font-family:var(--mono);font-size:12px}
.olock .fa-lock{font-size:11px;margin-top:3px}
.lrow-locked{display:grid;grid-template-columns:36px 44px minmax(0,1fr) auto 16px;gap:10px;align-items:center;padding:12px 4px;border-top:1px solid var(--line);color:var(--muted);cursor:not-allowed}
.lrow-locked b{font-weight:500;display:block;color:var(--muted)}
.lrow-locked small{display:block;font-size:12.5px;margin-top:2px}
.lrow-locked .n{font-family:var(--mono);font-size:13.5px}
@media (max-width:640px){.lrow-locked{grid-template-columns:30px minmax(0,1fr)}.lrow-locked .n{display:none}}
.pbanner.locked{background:var(--sunk)}
.btn2.is-locked{cursor:not-allowed;color:var(--muted);flex:1}
.btn2.out.is-locked{flex:none;border-color:var(--line)}
.btn2.is-locked:hover{border-color:var(--line);background:var(--surface);color:var(--muted)}
.ccard.prereq .glyph,.ccard.prereq .code{opacity:.65}
.lock-why{margin:0;font-size:12.5px!important;color:var(--muted)}
.lock-why i{margin-right:4px}
.lpath li.prereq .step{background:var(--surface);color:var(--muted);border:1.5px solid var(--line)}

/* Perks strip */
.perkbar{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) minmax(0,1.1fr);margin-top:16px}
.perkbar>*{padding:18px 22px;display:flex;align-items:center;gap:16px}
.perkbar>*+*{border-left:1px solid var(--line)}
.pk-level>div{flex:1;display:grid;gap:3px}
.pk-level .pbar{margin-top:6px;--c:var(--swoosh)}
.pk-level .pbar i{background:var(--swoosh)}
.medal{width:54px;height:54px;border-radius:50%;flex:none;display:grid;place-items:center;background:conic-gradient(from 200deg,#E8B400,#FFE08A,#E8B400);box-shadow:0 6px 16px rgba(232,180,0,.35)}
.medal b{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#fff;color:#8A6300;font-family:var(--display);font-size:18px}
.pk-name{font-family:var(--display);font-size:19px;line-height:1.1}
.pk-sub{font-size:13px;color:var(--muted)}
.pk-streak b,.pk-badges b{display:block;font-size:16px}
.flame{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:21px;background:var(--sunk);color:var(--muted);flex:none}
.pk-streak.on .flame{background:#FFEBDD;color:#E4572E}
.pk-badges{text-decoration:none;color:var(--ink)}
.pk-badges:hover{background:var(--mint-2)}
.pk-badges .icons{display:flex;flex:none}
.pk-badges .icons span{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-size:14px;background:var(--tone-amber);color:var(--tone-amber-i);border:2px solid var(--surface);margin-left:-8px}
.pk-badges .icons span:first-child{margin-left:0}
.pk-badges .icons span.none{background:var(--sunk);color:var(--muted)}
.pk-badges .pk-sub i{font-size:11px;margin-left:4px}
@media (max-width:900px){.perkbar{grid-template-columns:minmax(0,1fr)}.perkbar>*+*{border-left:0;border-top:1px solid var(--line)}}

/* Toasts */
.toasts{position:fixed;right:20px;bottom:20px;z-index:80;display:grid;gap:10px;width:min(340px,calc(100vw - 32px))}
@media (max-width:760px){.toasts{bottom:84px;right:16px}}
.toast{display:flex;gap:12px;align-items:center;background:#1B1740;color:#ECEBFA;border-radius:14px;padding:12px 14px;box-shadow:0 14px 36px rgba(0,0,0,.25);animation:toastIn .3s ease}
.toast .ti{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;flex:none;font-size:18px;background:#E8B400;color:#3A2A00}
.toast.xp .ti{background:#6A45E6;color:#fff;font-family:var(--display);font-size:13px;font-weight:700}
.toast.lvl .ti{background:conic-gradient(from 200deg,#E8B400,#FFE08A,#E8B400)}
.toast b{display:block;font-size:14px}
.toast span.s{font-size:12.5px;color:rgba(236,235,250,.7)}
.toast.out{opacity:0;transform:translateY(8px);transition:all .3s}
@keyframes toastIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.pf-perks{padding:22px}
.pf-pk{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:0;border:1px solid var(--line);border-radius:14px;margin-bottom:18px}
.pf-pk>*{padding:16px 18px;display:flex;align-items:center;gap:14px}
.pf-pk>*+*{border-left:1px solid var(--line)}
.bgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.bdg{display:grid;justify-items:center;text-align:center;gap:4px;border:1px solid var(--line);border-radius:14px;padding:16px 10px;background:var(--surface)}
.bdg .bi{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;font-size:20px;background:var(--sunk);color:var(--muted);margin-bottom:4px}
.bdg.on .bi{background:conic-gradient(from 200deg,#E8B400,#FFE08A,#E8B400);color:#5A3F00;box-shadow:0 6px 16px rgba(232,180,0,.3)}
.bdg b{font-size:14px}
.bdg small{font-size:12px;color:var(--muted);line-height:1.35}
.bdg:not(.on){opacity:.7}
.xp-how{margin-top:16px;font-size:14px}
.xp-how summary{cursor:pointer;color:var(--accent);font-weight:600}
.xp-how ul{margin:10px 0 0;padding-left:20px;color:var(--muted);display:grid;gap:4px}
@media (max-width:760px){.pf-pk{grid-template-columns:minmax(0,1fr)}.pf-pk>*+*{border-left:0;border-top:1px solid var(--line)}}

/* Public catalogue */
.pub-hero-in{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(220px,.8fr);gap:24px;align-items:center}
.pub-hero h1{font-size:clamp(30px,4vw,52px);max-width:18ch}
.grad{background:var(--brand-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.pub-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
@media (max-width:760px){.pub-hero-in{grid-template-columns:minmax(0,1fr)}}
.pub-stats .stat2{grid-template-columns:auto minmax(0,1fr)}
.pub-stats .stat2 .tile{grid-row:span 2}
.pub-when{font-size:13px!important}
.pub-when i{margin-right:6px;color:var(--c)}
.free-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.free-card{display:grid;grid-template-columns:48px minmax(0,1fr) 14px;gap:14px;align-items:center;padding:14px 16px;text-decoration:none;color:var(--ink)}
.free-card:hover{border-color:var(--c)}
.free-card .glyph{width:48px;height:48px;border-radius:12px;display:grid;place-items:center;font-size:20px;color:var(--c);background:color-mix(in srgb,var(--c) 12%,var(--surface))}
.free-card small{display:block;font-family:var(--mono);font-size:12px;color:var(--muted)}
.free-card b{display:block;font-size:15px;line-height:1.3;margin:2px 0}
.free-card em{font-style:normal;font-size:12.5px;color:var(--ok);font-weight:600}
.free-card>i{color:var(--muted);font-size:13px}
.faq{display:grid;gap:10px;max-width:900px}
.faq details>summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 20px;cursor:pointer;font-weight:600}
.faq details>summary::-webkit-details-marker{display:none}
.faq details>summary i{color:var(--muted);font-size:12px;transition:transform .2s}
.faq details[open]>summary i{transform:rotate(180deg)}
.faq details p{margin:0;padding:0 20px 16px;color:var(--muted);line-height:1.6}
.enrol{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px;align-items:center;padding:26px 28px;margin-top:34px;background:linear-gradient(135deg,var(--mint),var(--surface) 70%)}
.enrol h2{font-size:24px}
.enrol p{margin:6px 0 0;color:var(--muted)}
.enrol-btns{display:flex;gap:10px;flex-wrap:wrap}
@media (max-width:900px){.enrol{grid-template-columns:minmax(0,1fr)}}
.pubfoot{border-top:1px solid var(--line);background:var(--surface);margin-top:40px}
.pubfoot .pf-in{max-width:1480px;margin:0 auto;padding:30px clamp(16px,2.5vw,32px) 10px;display:grid;grid-template-columns:minmax(0,2fr) repeat(2,minmax(0,1fr));gap:24px}
.pubfoot .brand{color:var(--ink)}
.pubfoot p{color:var(--muted);font-size:14px;max-width:48ch}
.pubfoot b{display:block;margin-bottom:8px;font-size:14px}
.pubfoot a:not(.brand){display:block;color:var(--muted);text-decoration:none;font-size:14px;padding:3px 0}
.pubfoot a:not(.brand):hover{color:var(--accent)}
.pubfoot a i{width:18px}
.pf-legal{max-width:1480px;margin:0 auto;padding:12px clamp(16px,2.5vw,32px) 28px;font-size:12.5px;color:var(--muted)}
@media (max-width:760px){.pubfoot .pf-in{grid-template-columns:minmax(0,1fr)}}
.pub-lesson{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px}
.pub-lesson .lesson-body{margin-top:0}
.pub-rail{top:84px;padding-top:40px}
@media (max-width:1100px){.pub-lesson{grid-template-columns:minmax(0,1fr)}.pub-rail{display:none}}
.unlock-more{margin-top:24px;padding:22px 24px;display:grid;gap:14px;border:1.5px dashed color-mix(in srgb,var(--accent) 35%,var(--line))}
.um-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.um-row>div{display:grid;grid-template-columns:44px minmax(0,1fr);gap:2px 12px;align-items:center}
.um-row .tile{grid-row:span 2}
.um-row small{color:var(--muted);font-size:13px}
.unlock-more>p{margin:0;color:var(--muted)}
@media (max-width:760px){.um-row{grid-template-columns:minmax(0,1fr)}}
body.public .top2-right .btn2{padding:9px 16px;font-size:14px}
@media (max-width:480px){body.public .top2-right .btn2{padding:8px 12px;font-size:13px}}
.pubfoot p.pf-legal{max-width:1480px}
.pub-lesson .pager{max-width:none}
@media (max-width:520px){.pub-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.pub-stats .stat2{grid-template-columns:minmax(0,1fr);padding:14px}.pub-stats .stat2 .tile{grid-row:auto;width:40px;height:40px;font-size:16px}}

/* Public: livelier catalogue */
.want{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:22px}
.want>span{font-size:13px;font-weight:600;color:var(--muted);margin-right:2px}
.want a{display:inline-flex;align-items:center;gap:8px;padding:7px 13px;border-radius:99px;background:var(--surface);border:1px solid var(--line);color:var(--ink);text-decoration:none;font-size:13.5px;font-weight:500;transition:border-color .15s,transform .15s}
.want a i{color:var(--c)}
.want a:hover{border-color:var(--c);transform:translateY(-1px)}
.flow-demo{position:relative;justify-self:end;width:min(360px,100%);padding:18px 10px 26px}
.fd-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 24px 50px rgba(30,24,80,.14);overflow:hidden;transform:rotate(-1.5deg)}
.fd-top{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line);background:var(--sunk)}
.fd-top .dots{display:flex;gap:5px}.fd-top .dots i{width:9px;height:9px;border-radius:50%;background:var(--line)}
.fd-code{font-family:var(--mono);font-size:11.5px;color:var(--muted)}
.fd-tabs{position:relative;display:flex;gap:18px;padding:10px 16px 0;font-size:13px;font-weight:600;color:var(--muted);border-bottom:1px solid var(--line)}
.fd-tabs span{padding-bottom:9px}
.fd-tabs .ink{position:absolute;bottom:-1px;left:16px;height:2.5px;width:38px;background:var(--accent);border-radius:2px;animation:fdInk 9s infinite}
.fd-tabs .t1{animation:fdT1 9s infinite}.fd-tabs .t2{animation:fdT2 9s infinite}.fd-tabs .t3{animation:fdT3 9s infinite}
.fd-body{position:relative;height:150px}
.fd-body .p{position:absolute;inset:0;padding:14px 16px;display:grid;align-content:start;gap:8px;opacity:0}
.fd-body .p1{animation:fdP1 9s infinite}.fd-body .p2{animation:fdP2 9s infinite}.fd-body .p3{animation:fdP3 9s infinite}
.fd-body b{font-size:13.5px}
.ln{height:7px;border-radius:4px;background:var(--sunk)}.ln.w90{width:90%}.ln.w70{width:70%}.ln.w80{width:80%}
.fd-callout{font-size:12px;border-left:3px solid var(--accent);background:var(--accent-soft);padding:6px 9px;border-radius:0 6px 6px 0}
.fd-dax{font-family:var(--mono);font-size:12.5px;background:var(--sunk);border-radius:7px;padding:8px 10px}
.fd-dax .k{color:var(--bi)}
.fd-res{border:1px solid var(--ok);background:var(--ok-soft);border-radius:8px;padding:8px 10px}
.fd-res b{font-family:var(--display);font-size:24px;display:block;line-height:1}
.fd-res span{font-size:11.5px;color:var(--ok)}
.fd-body .opt{font-size:12px;padding:6px 9px;cursor:default}
.fd-body .opt.ok{background:var(--ok-soft);border-color:var(--ok)}
.fd-chip{position:absolute;display:inline-flex;align-items:center;gap:7px;background:var(--surface);border:1px solid var(--line);border-radius:99px;padding:6px 12px;font-size:12.5px;font-weight:600;box-shadow:0 10px 24px rgba(0,0,0,.1);animation:fdFloat 5s ease-in-out infinite}
.fd-chip.c1{top:0;right:-4px;color:#5B3FE0}.fd-chip.c2{bottom:4px;left:-14px;color:#8A6300;animation-delay:-1.6s}.fd-chip.c3{bottom:40px;right:-18px;color:#E4572E;animation-delay:-3.2s}
@keyframes fdP1{0%,30%{opacity:1}33.3%,97%{opacity:0}100%{opacity:1}}
@keyframes fdP2{0%,30%{opacity:0}33.3%,63%{opacity:1}66.6%,100%{opacity:0}}
@keyframes fdP3{0%,63%{opacity:0}66.6%,97%{opacity:1}100%{opacity:0}}
@keyframes fdInk{0%,30%{left:16px;width:38px}33.3%,63%{left:72px;width:26px}66.6%,97%{left:116px;width:32px}100%{left:16px;width:38px}}
@keyframes fdT1{0%,30%{color:var(--ink)}33.3%,97%{color:var(--muted)}100%{color:var(--ink)}}
@keyframes fdT2{0%,30%{color:var(--muted)}33.3%,63%{color:var(--ink)}66.6%,100%{color:var(--muted)}}
@keyframes fdT3{0%,63%{color:var(--muted)}66.6%,97%{color:var(--ink)}100%{color:var(--muted)}}
@keyframes fdFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
@media (max-width:760px){.flow-demo{display:none}}

.build-steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;counter-reset:b}
.build-steps li{position:relative;display:grid;gap:6px;align-content:start;background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--c);border-radius:14px;padding:18px 16px;box-shadow:var(--shadow)}
.build-steps li:not(:last-child)::after{content:"";position:absolute;right:-12px;top:44px;width:10px;height:2px;background:var(--line)}
.build-steps .bs-n{position:absolute;top:12px;right:14px;font-family:var(--mono);font-size:12px;color:var(--muted)}
.build-steps .glyph{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:19px;color:var(--c);background:color-mix(in srgb,var(--c) 12%,var(--surface));margin-bottom:6px}
.build-steps b{font-size:16px}
.build-steps small{color:var(--muted);font-size:13.5px;line-height:1.45}
.build-steps em{font-style:normal;font-family:var(--mono);font-size:12px;color:var(--c);margin-top:4px}
@media (max-width:1100px){.build-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.build-steps li::after{display:none}}
@media (max-width:520px){.build-steps{grid-template-columns:minmax(0,1fr)}}

.try-box{display:grid;grid-template-columns:260px minmax(0,1fr);overflow:hidden}
.try-tabs{display:grid;align-content:start;gap:6px;padding:14px;border-right:1px solid var(--line);background:var(--sunk)}
.try-tabs button{display:flex;align-items:center;gap:12px;text-align:left;border:1px solid transparent;background:none;border-radius:12px;padding:12px;cursor:pointer;font:inherit;color:var(--ink)}
.try-tabs button i{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:var(--surface);color:var(--muted);flex:none}
.try-tabs button b{display:block;font-size:14.5px}
.try-tabs button small{display:block;font-size:12px;color:var(--muted)}
.try-tabs button[aria-selected="true"]{background:var(--surface);border-color:var(--line);box-shadow:var(--shadow)}
.try-tabs button[aria-selected="true"] i{background:var(--accent);color:#fff}
.try-stage{padding:18px;min-width:0}
.try-stage .console{max-width:none;margin:0}
@media (max-width:860px){.try-box{grid-template-columns:minmax(0,1fr)}.try-tabs{grid-auto-flow:column;grid-auto-columns:minmax(200px,1fr);overflow-x:auto;border-right:0;border-bottom:1px solid var(--line)}}

.sq-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
.sq{padding:18px 20px;display:grid;gap:12px;align-content:start;border-top:3px solid var(--c)}
.sq-h{display:flex;justify-content:space-between;align-items:center}
.sq-h .code{font-family:var(--display);font-weight:700;color:var(--c);font-size:18px}
.sq .stem{margin:0;font-weight:500;line-height:1.5}
.sq .why{margin-top:0}
.sq-more{font-size:13.5px;color:var(--accent);font-weight:600;text-decoration:none}
.sq-more i{font-size:11px;margin-left:4px}

.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;transform:none}.fd-tabs .ink,.fd-tabs span,.fd-body .p,.fd-chip{animation:none!important}.fd-body .p1{opacity:1}}

/* Lesson video */
.vid{padding:18px 20px 20px;margin-bottom:22px}
.vid-h{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.vid-h h2{font-size:19px}
.vid-h .rt{margin-left:auto;color:var(--muted);font-size:13.5px}
.vid-h a.rt{color:var(--accent);text-decoration:none;font-weight:500;display:inline-flex;gap:7px;align-items:center}
.vid-h a.rt:hover{text-decoration:underline}
.vid-frame{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#14122E}
.vid-frame iframe,.vid-frame video{position:absolute;inset:0;width:100%;height:100%;border:0}
.vid{scroll-margin-top:84px}

/* Course price (public course list, course page, enrol box) */
.price-tag{display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 10px;margin:4px 0 2px}
.price-tag b{font-family:var(--display);font-weight:700;font-size:26px;color:var(--ink);letter-spacing:-.01em}
.price-tag s{color:var(--muted);font-size:15px}
.price-tag .off{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:3px 8px;border-radius:6px;color:var(--c,var(--accent));background:color-mix(in srgb,var(--c,var(--accent)) 12%,transparent)}
.price-tag small{flex-basis:100%;color:var(--muted);font-size:13px}
.trk-hero .price-tag b{font-size:32px}

/* ===================================================================
   Public catalogue, minimal layout (Sep 2026). Scoped to .cx.
   =================================================================== */
.cx{max-width:1120px;margin:0 auto}
.cx h2{font-size:clamp(24px,2.4vw,30px);font-weight:700;letter-spacing:-.01em}
.cx-hero{padding:clamp(40px,7vw,88px) 0 clamp(32px,5vw,56px);border-bottom:1px solid var(--line)}
.cx-eyebrow{margin:0 0 14px;font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}
.cx-hero h1{font-size:clamp(36px,5.4vw,64px);font-weight:700;line-height:1.04;letter-spacing:-.025em;max-width:16ch}
.cx-lead{margin:20px 0 0;max-width:58ch;color:var(--muted);font-size:clamp(16px,1.4vw,18.5px);line-height:1.6}
.cx-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.cx-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:clamp(36px,5vw,56px) 0 0;max-width:760px}
.cx-stats div{padding:0 20px;border-left:1px solid var(--line)}
.cx-stats div:first-child{padding-left:0;border-left:0}
.cx-stats dt{font-size:13px;color:var(--muted)}
.cx-stats dd{margin:4px 0 0;font-family:var(--display);font-size:clamp(24px,2.6vw,32px);font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
@media (max-width:640px){.cx-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 0}.cx-stats div:nth-child(3){padding-left:0;border-left:0}}

.cx-sec{padding:clamp(40px,6vw,72px) 0 0}
.cx-h{margin-bottom:24px}
.cx-h p{margin:8px 0 0;color:var(--muted);font-size:15.5px;max-width:60ch}
.cx-code{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--c,var(--accent));white-space:nowrap}

.cx-group+.cx-group{margin-top:40px}
.cx-group-h{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 16px;padding-bottom:12px;border-bottom:1px solid var(--ink)}
.cx-group-h h3{font-size:17px;font-weight:700}
.cx-group-h p{margin:0;color:var(--muted);font-size:14px}
.cx-list{list-style:none;margin:0;padding:0}
.cx-list li{border-bottom:1px solid var(--line)}
.cx-course{display:grid;grid-template-columns:96px minmax(0,1fr) 200px;gap:24px;align-items:start;padding:24px 8px;text-decoration:none;color:var(--ink);border-radius:10px;transition:background .15s}
.cx-course:hover{background:var(--surface)}
.cx-course .cx-code{padding-top:4px}
.cx-main{display:grid;gap:6px;min-width:0}
.cx-main b{font-family:var(--display);font-size:20px;font-weight:700;letter-spacing:-.01em}
.cx-blurb{color:var(--muted);font-size:15px;line-height:1.55;max-width:62ch}
.cx-meta{font-size:13px;color:var(--muted)}
.cx-side{display:grid;justify-items:end;gap:10px;text-align:right}
.cx-side .price-tag{justify-content:flex-end;margin:0}
.cx-side .price-tag b{font-size:22px}
.cx-side .price-tag small{text-align:right}
.cx-go{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14.5px;color:var(--accent)}
.cx-go i{font-size:12px;transition:transform .15s}
.cx-course:hover .cx-go i{transform:translateX(3px)}
@media (max-width:760px){
  .cx-course{grid-template-columns:minmax(0,1fr);gap:10px;padding:20px 0}
  .cx-course .cx-code{padding-top:0}
  .cx-side{justify-items:start;text-align:left}
  .cx-side .price-tag{justify-content:flex-start}
  .cx-side .price-tag small{text-align:left}
}

.cx-steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,4vw,48px)}
.cx-steps li{border-top:1px solid var(--line);padding-top:18px}
.cx-steps span{font-family:var(--mono);font-size:13px;color:var(--accent);font-weight:600}
.cx-steps h3{font-size:19px;margin:10px 0 6px}
.cx-steps p{margin:0;color:var(--muted);font-size:15px;line-height:1.6}
@media (max-width:760px){.cx-steps{grid-template-columns:minmax(0,1fr)}}

.cx .try-box{box-shadow:none}
.cx-q{margin-top:16px;padding:24px;box-shadow:none;max-width:760px;border-top:1px solid var(--line) !important}
.cx-q-h{margin:0 0 8px;font-size:13px;color:var(--muted)}

.cx-free{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:32px 40px}
.cx-free h3{display:flex;align-items:baseline;gap:10px;font-size:16px;font-weight:700;padding-bottom:10px;border-bottom:1px solid var(--ink);margin:0}
.cx-free ul{list-style:none;margin:0;padding:0}
.cx-free li a{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:12px;align-items:baseline;padding:12px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink);font-size:15px}
.cx-free li a:hover .t{color:var(--accent)}
.cx-free .n{font-family:var(--mono);font-size:13px;color:var(--muted)}
.cx-free .m{font-size:13px;color:var(--muted);white-space:nowrap}

.cx-faq{max-width:820px;border-top:1px solid var(--line)}
.cx-faq details{border-bottom:1px solid var(--line)}
.cx-faq summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 0;cursor:pointer;font-weight:600;font-size:16px}
.cx-faq summary::-webkit-details-marker{display:none}
.cx-faq summary i{color:var(--muted);font-size:13px;transition:transform .2s}
.cx-faq details[open] summary i{transform:rotate(45deg)}
.cx-faq details p{margin:0;padding:0 0 20px;color:var(--muted);line-height:1.65;max-width:70ch}

.cx-cta{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px 32px;align-items:center;margin:clamp(48px,7vw,88px) 0 clamp(40px,6vw,64px);padding:clamp(28px,4vw,44px);border-radius:18px;background:var(--surface);border:1px solid var(--line)}
.cx-cta p{margin:8px 0 0;color:var(--muted)}
.cx-cta-btns{display:flex;flex-wrap:wrap;gap:10px}
.cx-cta-foot{grid-column:1/-1;margin:0 !important;padding-top:16px;border-top:1px solid var(--line);font-size:14px}
.cx-cta-foot a{color:var(--accent);font-weight:600;text-decoration:none}
@media (max-width:760px){.cx-cta{grid-template-columns:minmax(0,1fr)}}

/* ---- Exam-format questions (UGC NET): passage, data table, code, statements, List I / II ---- */
.qkind{display:inline-block;font-size:11.5px;font-weight:600;letter-spacing:.02em;color:var(--tc,var(--accent));background:var(--sunk);border-radius:99px;padding:1px 9px;margin:2px 0 6px}
.qn+.qkind{margin-left:8px}
.nq-pass{border:1px solid var(--line);border-radius:10px;background:var(--sunk);padding:8px 14px;margin:4px 0 12px}
.nq-pass summary{cursor:pointer;font-weight:600;font-size:14px;color:var(--tc,var(--accent))}
.nq-pass p{margin:8px 0;font-size:15px;line-height:1.65}
.nq-data{margin:4px 0 12px}.nq-cap{font-weight:600;font-size:14px;margin-bottom:6px}.nq-note{font-size:13px;color:var(--muted);margin-top:4px}
.nq-tw{overflow-x:auto;margin:0 0 12px;-webkit-overflow-scrolling:touch}
.nq-tw table{border-collapse:collapse;font-size:14px;min-width:60%}
.nq-tw th,.nq-tw td{border:1px solid var(--line);padding:6px 10px;text-align:left;vertical-align:top}
.nq-tw thead th{background:var(--sunk)}
.nq-lists td.k{font-family:var(--mono);font-weight:600;color:var(--tc,var(--accent));width:2.2em;white-space:nowrap}
.nq-st{display:grid;gap:6px;margin:0 0 12px}
.nq-s{background:var(--sunk);border-radius:8px;padding:8px 12px;font-size:15px;line-height:1.55;overflow-wrap:break-word}
.q pre.nq-code{margin:0 0 12px;font-size:13.5px;overflow-x:auto;white-space:pre}
.q p.stem.nq-after{margin-top:0}
.opt>span:last-child{white-space:pre-line}

/* ---- Timed pattern papers ---- */
.timer{display:flex;align-items:baseline;gap:8px;font-variant-numeric:tabular-nums;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:10px 16px;position:sticky;top:72px;z-index:5}
.timer b{font-family:var(--display);font-size:28px;line-height:1}
.timer span{color:var(--muted);font-size:13px}
.timer.low{border-color:var(--bad);background:var(--bad-soft)}.timer.low b{color:var(--bad)}
.score b.marks small{font-size:20px;color:var(--muted);font-weight:600}
.papers .rows li{list-style:none}
.paper-row{display:flex;align-items:center;gap:12px;padding:10px 4px;border-top:1px solid var(--line);flex-wrap:wrap}
.papers .rows li:first-child .paper-row{border-top:0}
.paper-row .grow{flex:1;min-width:220px;display:flex;flex-direction:column}
.paper-row .pb{font-size:13px;color:var(--muted);line-height:1.45}
.paper-row .pm{font-size:13px;color:var(--muted);white-space:nowrap}
.papers .rows{padding:0;margin:0}

/* ---- Full-width content: the main column uses all the space beside the course outline ---- */
.shell2,.wrap2,.top2-in{max-width:none}
.hero,.lesson-head,.prose,.terms,.glance,.toc,.tip,.lab-intro,.steps,.labdone,.q,.pager,.console,
.test-head,.score,.exfiles,.checkyw,.flash,.dblock,.cert,.choose,.submit-bar,.qnav,.note,.hero p{max-width:none}

/* ---- CBT test screen: one question at a time with a status palette (like the NTA exam) ---- */
.cbt{display:block}
.cbt-on{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:24px;align-items:start}
.cbt-on .q{display:none;margin-bottom:0}
.cbt-on .q.cur{display:block;min-height:320px}
.cbt-on .submit-bar{display:none}
.cbt-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;position:sticky;bottom:0;z-index:20;background:var(--ground);border-top:1px solid var(--line);padding:12px 0 calc(12px + env(safe-area-inset-bottom,0px));margin-top:14px}
.cbt-actions .grow{flex:1}
.cbt-actions .btn:disabled{opacity:.45;cursor:not-allowed}
.cbt-pal{position:sticky;top:84px}
.cbt:not(.cbt-on) .cbt-pal{display:none}
.pal-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px 16px}
.pal-body h3{font-size:16px;margin:0 0 12px}
.pal-legend{list-style:none;padding:0;margin:0 0 14px;display:grid;grid-template-columns:1fr 1fr;gap:8px 10px;font-size:12.5px;color:var(--muted)}
.pal-legend li{display:flex;align-items:center;gap:8px}
.pal-legend li.wide{grid-column:1/-1}
.cbt-pal .qnav{display:grid;grid-template-columns:repeat(auto-fill,minmax(38px,1fr));gap:6px;margin:0 0 14px;max-height:48vh;overflow-y:auto;padding:2px}
.cbt-pal .qnav a,.pk{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:36px;border-radius:8px;font-family:var(--mono);font-size:13px;font-weight:600;text-decoration:none;border:1px solid var(--line);background:var(--sunk);color:var(--ink)}
.pk{height:26px;min-width:30px;font-size:12px;flex:none}
.cbt-pal .qnav a.pa,.pk.pa{background:#1D9A4C;border-color:#1D9A4C;color:#fff;border-radius:12px 12px 4px 4px}
.cbt-pal .qnav a.pn,.pk.pn{background:#D1382E;border-color:#D1382E;color:#fff;border-radius:4px 4px 12px 12px}
.cbt-pal .qnav a.pv,.pk.pv{background:var(--sunk);color:var(--ink)}
.cbt-pal .qnav a.pr,.pk.pr{background:#6D3FD1;border-color:#6D3FD1;color:#fff;border-radius:50%}
.cbt-pal .qnav a.pra,.pk.pra{background:#6D3FD1;border-color:#6D3FD1;color:#fff;border-radius:50%;box-shadow:inset 0 0 0 2px #6D3FD1,inset 0 0 0 4px #1D9A4C}
.cbt-pal .qnav a.cur{outline:2px solid var(--accent);outline-offset:2px}
.pal-submit{width:100%;justify-content:center}
.pal-toggle{display:none}
@media (max-width:1100px){
  .cbt-on{grid-template-columns:minmax(0,1fr)}
  .cbt-pal{position:static;order:-1}
  .pal-toggle:not([hidden]){display:flex;align-items:center;gap:8px;width:100%;justify-content:center;padding:10px 14px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface);font-weight:600;cursor:pointer}
  .pal-count{font-family:var(--mono);color:var(--muted);font-weight:500}
  .cbt-on .pal-body{display:none;margin-top:8px}
  .cbt-on.pal-open .pal-body{display:block}
  .cbt-actions .btn{flex:1 1 auto;justify-content:center}
  .cbt-actions .grow{display:none}
}