/* /learn/learn.css — Heavy Haul Fundamentals + quiz + cert/share pages.
   Paper & Ink tokens (same values as od-101.html) + course components. Tokens only; no raw hex in components. */
:root{
  --bg:#f4f1ea; --panel:#fffdf8; --panel2:#f7f4ec;
  --ink:#16202b; --body:#3a434d; --muted:#47525d; --dim:#6a7280;
  --accent:#2f5d8f; --accent2:#264b74; --accent-soft:rgba(47,93,143,.08);
  --border:#d8d2c4; --border-soft:#e5e0d4;
  --good:#15803d; --good-soft:rgba(21,128,61,.08); --warn:#b45309; --warn-soft:rgba(180,83,9,.07); --bad:#a02323; --bad-soft:rgba(160,35,35,.07);
  --navy:#0f1f33; --navy2:#1d3a5f; --navy-title:#f4f7fb; --navy-body:#c3cfdd; --navy-label:#aebccd; --navy-accent:#8ab8f0;
  --code:#ebe6da; --shadow:0 1px 2px rgba(22,32,43,.05),0 8px 28px rgba(22,32,43,.06);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0f151e; --panel:#171f2a; --panel2:#131a24;
    --ink:#e9e5db; --body:#c3cbd6; --muted:#a8b0bb; --dim:#8892a0;
    --accent:#82aad9; --accent2:#a3c2e6; --accent-soft:rgba(130,170,217,.09);
    --border:#2a3441; --border-soft:#222c38;
    --good:#48b06c; --good-soft:rgba(72,176,108,.1); --warn:#d99a45; --warn-soft:rgba(217,154,69,.09); --bad:#d06868; --bad-soft:rgba(208,104,104,.1);
    --navy:#0a1220; --navy2:#16304f; --code:#0d1520; --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 28px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"]{
  --bg:#0f151e; --panel:#171f2a; --panel2:#131a24;
  --ink:#e9e5db; --body:#c3cbd6; --muted:#a8b0bb; --dim:#8892a0;
  --accent:#82aad9; --accent2:#a3c2e6; --accent-soft:rgba(130,170,217,.09);
  --border:#2a3441; --border-soft:#222c38;
  --good:#48b06c; --good-soft:rgba(72,176,108,.1); --warn:#d99a45; --warn-soft:rgba(217,154,69,.09); --bad:#d06868; --bad-soft:rgba(208,104,104,.1);
  --navy:#0a1220; --navy2:#16304f; --code:#0d1520; --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 28px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--body);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:15.5px;line-height:1.6;padding-inline:20px;padding-block:0 72px}
a{color:var(--accent)}
img{max-width:100%}
.wrap{max-width:860px;margin:0 auto}
.eyebrow{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin:0 0 8px}
h1{font-family:Oswald,Impact,"Arial Narrow",sans-serif;font-weight:600;font-size:clamp(30px,5vw,44px);line-height:1.05;letter-spacing:.01em;text-transform:uppercase;color:var(--ink);margin:0 0 14px;text-wrap:balance}
h2{font-family:Oswald,Impact,"Arial Narrow",sans-serif;font-weight:600;font-size:26px;text-transform:uppercase;letter-spacing:.02em;color:var(--ink);margin:0 0 10px;text-wrap:balance}
h3{font-family:Oswald,Impact,"Arial Narrow",sans-serif;font-weight:500;font-size:19px;text-transform:uppercase;letter-spacing:.03em;color:var(--ink);margin:26px 0 8px}
h4{font-size:15px;font-weight:600;color:var(--ink);margin:18px 0 6px}
p{max-width:68ch;margin:0 0 14px}
ul,ol{margin:0 0 14px;padding-left:22px;max-width:68ch}
li{margin-bottom:6px}
strong{color:var(--ink);font-weight:600}
code,.mono{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:13px}
code{background:var(--code);padding:1px 5px;border-radius:3px;color:var(--ink)}
.small{font-size:13px;color:var(--dim)}
.tnum{font-variant-numeric:tabular-nums}
hr{border:0;border-top:1px solid var(--border);margin:28px 0}
.topbar{height:6px;background:linear-gradient(90deg,#3a6ea5,#264b74);margin:0 -20px}

/* ---- course chrome ---- */
.course-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0;border-bottom:1px solid var(--border);margin-bottom:28px;flex-wrap:wrap}
.course-nav .brand{display:flex;align-items:center;gap:9px;text-decoration:none}
.course-nav .brand img{width:26px;height:26px}
.course-nav .brand span{font-family:Oswald,Impact,sans-serif;font-weight:700;font-size:16px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink)}
.course-nav .brand span b{color:var(--accent)}
.course-nav .crumbs{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.course-nav .crumbs a{color:var(--dim);text-decoration:none}
.course-nav .crumbs a:hover{color:var(--accent)}
.lede{font-size:18px;line-height:1.5;color:var(--body);max-width:62ch;margin:0 0 22px}
.meta-row{display:flex;flex-wrap:wrap;gap:8px 18px;font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin:0 0 26px}
.meta-row .done{color:var(--good)}
section.lesson{padding-block:8px 8px}
section.lesson + section.lesson{border-top:1px solid var(--border-soft);margin-top:24px;padding-top:26px}

/* ---- content blocks ---- */
.callout{background:var(--panel);border:1px solid var(--border);border-left:4px solid var(--accent);padding:14px 18px;margin:16px 0;max-width:70ch}
.callout.warn{border-left-color:var(--warn);background:var(--warn-soft)}
.callout.money{border-left-color:var(--bad);background:var(--bad-soft)}
.callout .eyebrow{margin-bottom:4px}
.callout p:last-child,.callout ul:last-child{margin-bottom:0}
.phone{background:var(--panel2);border:1px dashed var(--border);padding:14px 18px;margin:16px 0;max-width:70ch}
.phone .eyebrow{margin-bottom:6px}
.phone q{display:block;font-style:normal;color:var(--ink);margin:0 0 6px;quotes:"\201C" "\201D"}
.phone q::before{content:open-quote;color:var(--dim)} .phone q::after{content:close-quote;color:var(--dim)}
.dark{background:var(--navy);color:var(--navy-body);padding:22px 24px;margin:18px 0;border-left:4px solid #3a6ea5}
.dark h3,.dark h4{color:var(--navy-title);margin-top:0}
.dark .eyebrow{color:var(--navy-label)}
.dark p,.dark li{color:var(--navy-body)}
.dark strong{color:var(--navy-title)}
.dark a{color:var(--navy-accent)}
.dark code{background:#1a2b44;color:#dbe7f5}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:14px 0}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin:14px 0}
.card{background:var(--panel);border:1px solid var(--border);padding:16px 18px}
.card h4{margin-top:0}
.card p:last-child{margin-bottom:0}
.stat{background:var(--panel);border:1px solid var(--border);padding:14px 16px}
.stat .num{font-family:Oswald,Impact,sans-serif;font-size:30px;font-weight:600;color:var(--ink);line-height:1;font-variant-numeric:tabular-nums}
.stat .eyebrow{margin-bottom:6px}
.stat p{margin:6px 0 0;font-size:13px;color:var(--dim)}
.tablewrap{overflow-x:auto;margin:14px 0 18px}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:520px}
th{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);text-align:left;padding:8px 10px;border-bottom:2px solid var(--border);font-weight:500}
td{padding:9px 10px;border-bottom:1px solid var(--border-soft);vertical-align:top;color:var(--body)}
td:first-child{color:var(--ink);font-weight:600}
td.n{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.term-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:2px 24px;margin:14px 0}
.term{padding:9px 0;border-bottom:1px solid var(--border-soft);font-size:14.5px}
.term b{color:var(--ink);font-weight:600}
.term span{color:var(--body)}
.term .cat{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin-left:6px}
figure{margin:18px 0}
figure svg{display:block;max-width:100%;height:auto}
figcaption{font-size:13px;color:var(--dim);margin-top:6px}

/* ---- interactives ---- */
.calc{background:var(--panel);border:1px solid var(--border);padding:18px 20px;margin:18px 0;box-shadow:var(--shadow)}
.calc .eyebrow{margin-bottom:10px}
.calc .eyebrow::after{content:" · interactive";color:var(--accent)}
.calc-row{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:flex-end;margin-bottom:12px}
.calc label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--dim);font-weight:500;min-width:120px;flex:1 1 120px}
.calc input,.calc select{font:inherit;font-size:14px;padding:8px 10px;border:1px solid var(--border);background:var(--bg);color:var(--ink);border-radius:3px;width:100%}
.calc input[type=range]{padding:0;width:100%}
.calc input:focus,.calc select:focus{outline:2px solid var(--accent);outline-offset:1px}
.calc .out{background:var(--panel2);border:1px solid var(--border-soft);padding:12px 14px;margin-top:6px}
.calc .out .big{font-family:Oswald,Impact,sans-serif;font-size:32px;font-weight:600;color:var(--ink);line-height:1.1;font-variant-numeric:tabular-nums}
.calc .out .row{display:flex;justify-content:space-between;gap:10px;padding:4px 0;border-bottom:1px solid var(--border-soft);font-size:14px}
.calc .out .row:last-child{border-bottom:0}
.calc .out .row.sum{font-weight:600;color:var(--ink)}
.verdict{display:inline-block;font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;padding:3px 8px;border:1px solid var(--border);border-radius:2px;color:var(--muted)}
.verdict.ok{border-color:var(--good);color:var(--good);background:var(--good-soft)}
.verdict.warn{border-color:var(--warn);color:var(--warn);background:var(--warn-soft)}
.verdict.bad{border-color:var(--bad);color:var(--bad);background:var(--bad-soft)}
.btn{display:inline-block;font:inherit;font-weight:600;font-size:14px;padding:10px 16px;border:1px solid var(--border);background:var(--panel);color:var(--ink);border-radius:3px;cursor:pointer;text-decoration:none;line-height:1.2}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent2);border-color:var(--accent2);color:#fff}
.btn:disabled{opacity:.5;cursor:default}
.btn:focus-visible,.opt:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn.sm{font-size:13px;padding:7px 12px}

/* ---- checks / quiz ---- */
.check{background:var(--panel);border:1px solid var(--border);padding:20px 22px;margin:26px 0 8px}
.check .eyebrow{margin-bottom:12px}
.qbox{padding:14px 0;border-top:1px solid var(--border-soft)}
.qbox:first-of-type{border-top:0;padding-top:0}
.qtext{font-weight:600;color:var(--ink);margin:0 0 10px;max-width:70ch}
.qnum{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.1em;color:var(--dim);margin-right:8px}
.opts{display:grid;gap:6px;max-width:70ch}
.opt{display:flex;gap:10px;align-items:flex-start;text-align:left;font:inherit;font-size:14.5px;padding:9px 12px;border:1px solid var(--border);background:var(--bg);color:var(--body);border-radius:3px;cursor:pointer;line-height:1.4}
.opt:hover{border-color:var(--accent)}
.opt .k{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:12px;color:var(--dim);min-width:16px;padding-top:2px}
.opt.sel{border-color:var(--accent);background:var(--accent-soft);color:var(--ink)}
.opt.right{border-color:var(--good);background:var(--good-soft);color:var(--ink)}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft);color:var(--ink)}
.opt:disabled{cursor:default}
.qbox input.num{font:inherit;font-size:15px;padding:8px 10px;border:1px solid var(--border);background:var(--bg);color:var(--ink);border-radius:3px;max-width:200px}
.explain{margin:10px 0 0;padding:10px 12px;background:var(--panel2);border-left:3px solid var(--border);font-size:14px;color:var(--body);max-width:70ch}
.explain.ok{border-left-color:var(--good)} .explain.no{border-left-color:var(--bad)}
.explain a{color:var(--accent)}
.check-foot{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:16px}
.check-foot .score{font-family:Oswald,Impact,sans-serif;font-size:22px;color:var(--ink)}
.progress{height:4px;background:var(--border-soft);margin:0 0 20px}
.progress i{display:block;height:100%;background:var(--accent);transition:width .25s}
@media (prefers-reduced-motion: reduce){ .progress i{transition:none} html{scroll-behavior:auto} }

/* ---- hub ---- */
.levels{display:grid;gap:22px;margin:26px 0}
.level{border:1px solid var(--border);background:var(--panel)}
.level-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:8px 16px;padding:14px 18px;border-bottom:1px solid var(--border);background:var(--panel2)}
.level-head h2{font-size:20px;margin:0}
.level-head .status{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.level-head .status.pass{color:var(--good)}
.mod{display:grid;grid-template-columns:44px 1fr auto;gap:12px;align-items:center;padding:12px 18px;border-bottom:1px solid var(--border-soft);text-decoration:none;color:inherit}
.mod:last-child{border-bottom:0}
.mod:hover{background:var(--accent-soft)}
.mod .id{font-family:Oswald,Impact,sans-serif;font-weight:600;font-size:22px;color:var(--dim);font-variant-numeric:tabular-nums}
.mod b{display:block;color:var(--ink);font-weight:600;font-size:15px}
.mod span{display:block;font-size:13px;color:var(--dim)}
.mod .state{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);white-space:nowrap}
.mod .state.done{color:var(--good)}
.mod .state.seen{color:var(--accent)}
.level-foot{padding:12px 18px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;border-top:1px solid var(--border);background:var(--panel2)}
.level-foot .small{margin:0}
.next-prev{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:36px;padding-top:20px;border-top:1px solid var(--border)}
.next-prev.top{margin-top:16px;margin-bottom:28px;padding-top:0;padding-bottom:16px;border-top:0;border-bottom:1px solid var(--border)}

/* ---- quiz page ---- */
.quiz-wrap{max-width:680px;margin:0 auto}
.quiz-hero{padding-block:44px 24px}
.quiz-hero h1{font-size:clamp(34px,7vw,58px)}
.quiz-hero .lede{font-size:18px}
.quiz-facts{display:flex;flex-wrap:wrap;gap:8px 22px;font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin:0 0 24px}
.qcard{background:var(--panel);border:1px solid var(--border);padding:24px 26px;box-shadow:var(--shadow)}
.qcard .qtext{font-size:19px;font-weight:600;color:var(--ink);line-height:1.35;margin:0 0 16px;text-wrap:balance}
.qcard .qbox{padding:0;border:0}
.qcard .opt{font-size:15.5px;padding:12px 14px}
.qcard img{display:block;max-width:100%;margin:0 0 14px;border:1px solid var(--border-soft)}
.result{padding-block:28px}
.result .big{font-family:Oswald,Impact,sans-serif;font-size:clamp(64px,14vw,110px);font-weight:700;line-height:1;color:var(--ink);font-variant-numeric:tabular-nums}
.result .big span{font-size:.4em;color:var(--dim);font-weight:500}
.result .tier{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:4px 0 18px}
.codebox{background:var(--navy);padding:18px 20px;margin:18px 0}
.codebox .eyebrow{color:var(--navy-label);margin-bottom:4px}
.codebox .code{font-family:Oswald,Impact,sans-serif;font-size:34px;font-weight:700;color:var(--navy-title);letter-spacing:.06em;line-height:1.1}
.codebox p{color:var(--navy-body);margin:6px 0 0;font-size:14px}
.codebox a{color:var(--navy-accent)}
.share-row{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 22px}
.emailrow{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 4px;max-width:520px}
.emailrow input{flex:1 1 220px;font:inherit;font-size:15px;padding:10px 12px;border:1px solid var(--border);background:var(--bg);color:var(--ink);border-radius:3px}
.emailrow input:focus{outline:2px solid var(--accent);outline-offset:1px}
.review{margin-top:26px}
.review .qbox .qtext{font-size:15px}
.rv{display:flex;gap:10px;align-items:flex-start;padding:10px 0;border-top:1px solid var(--border-soft);font-size:14px}
.rv .mark{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;min-width:52px;padding-top:2px}
.rv .mark.ok{color:var(--good)} .rv .mark.no{color:var(--bad)}
.rv b{color:var(--ink);display:block;font-weight:600}
.rv .ans{color:var(--body)}
.rv a{color:var(--accent)}

/* ---- share / cert / locked ---- */
body.share{display:flex;align-items:center;justify-content:center;min-height:100vh;padding-block:40px}
.share-wrap{max-width:560px;text-align:left}
.share-brand{display:flex;align-items:center;gap:9px;margin-bottom:26px}
.share-brand span{font-family:Oswald,Impact,sans-serif;font-weight:700;font-size:17px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink)}
.share-brand span b{color:var(--accent)}
.share-score{font-family:Oswald,Impact,sans-serif;font-size:96px;font-weight:700;line-height:1;color:var(--ink);font-variant-numeric:tabular-nums}
.share-score span{font-size:.4em;color:var(--dim);font-weight:500}
.share-tier{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:4px 0 16px}
.share-copy{font-size:16px;margin-bottom:18px}
.cert{max-width:680px;background:var(--panel);border:1px solid var(--border);padding:0 40px 34px;box-shadow:var(--shadow)}
.cert-bar{height:8px;background:linear-gradient(90deg,#3a6ea5,#264b74);margin:0 -40px 30px}
.cert h1{font-size:clamp(28px,5vw,40px)}
.cert-name{font-family:Oswald,Impact,sans-serif;font-size:30px;font-weight:500;color:var(--ink);margin:6px 0 10px}
.cert-meta{font-size:16px}
.cert-id{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11.5px;letter-spacing:.06em;color:var(--dim);margin:14px 0 20px}
.cert-actions{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}
@media (max-width:600px){ .mod{grid-template-columns:36px 1fr} .mod .state{grid-column:2} .cert{padding-inline:22px} .cert-bar{margin-inline:-22px} }