/* PartIX.ca v2 — DEMO 2
   Content/UI separated · single-cert focus · subtle review · glossary */
:root{
  --blue:#005A9C; --blue-dark:#00427a; --blue-ink:#01203b;
  --red:#EF3E42; --amber:#F5A524; --green:#17936A; --green-soft:#e6f5ee;
  --ink:#132030; --muted:#5d6b7a; --faint:#8a97a6; --line:#e6ecf3;
  --bg:#f3f7fb; --card:#fff;
  --shadow:0 4px 16px rgba(1,32,59,.07); --shadow-lg:0 16px 40px rgba(1,32,59,.14);
  --r:16px; --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Georgia,serif;
}
*{box-sizing:border-box}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.narrow{max-width:680px}

.demo-ribbon{background:repeating-linear-gradient(45deg,#132030,#132030 12px,#1b2c40 12px,#1b2c40 24px);
  color:#fff;text-align:center;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;padding:5px}

/* header */
.hdr{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.hdr .wrap{display:flex;align-items:center;gap:10px;min-height:60px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.12rem;color:var(--blue-ink)}
.logo .mk{width:30px;height:30px;display:block;flex:none}
.logo .ix{color:var(--blue)}
.tabs{display:flex;gap:2px;margin-left:4px}
.tabs a{padding:7px 9px;border-radius:9px;font-weight:600;font-size:.88rem;color:var(--muted);white-space:nowrap}
.tabs a:hover{background:#eef4fa;color:var(--blue)}
.tabs a.on{color:var(--blue);font-weight:700}
.hdr .right{margin-left:auto;display:flex;align-items:center;gap:7px}
.ask-btn{background:#f1f5fa;color:var(--muted);border:1px solid var(--line);font-weight:700;font-size:.85rem;padding:7px 11px;border-radius:9px;white-space:nowrap}
.ask-btn:hover{background:#e7eef6;color:var(--blue-ink)}

/* subtle cert switcher */
.certsw{position:relative}
.certsw>button{display:flex;align-items:center;gap:7px;background:#f1f5fa;border:1px solid var(--line);border-radius:9px;
  padding:6px 10px;font-family:inherit;font-weight:700;font-size:.83rem;color:var(--blue-ink);cursor:pointer;white-space:nowrap}
.certsw>button .dot{width:7px;height:7px;border-radius:50%;background:var(--green)}
.certsw>button .car{color:var(--faint);font-size:.7rem}
.certmenu{position:absolute;right:0;top:110%;background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow-lg);width:270px;padding:6px;display:none;z-index:50}
.certmenu.open{display:block}
.certmenu a{display:block;padding:10px 12px;border-radius:9px;color:var(--ink)}
.certmenu a:hover{background:#f1f5fa}
.certmenu a b{display:block;font-size:.9rem}
.certmenu a small{color:var(--muted);font-size:.75rem}
.certmenu a.locked{opacity:.6}
.certmenu a .lk{font-size:.68rem;color:var(--amber);font-weight:700}
.certmenu .hd{font-size:.68rem;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);padding:8px 12px 4px}

/* page head */
.phead{padding:24px 0 4px}
.phead .cert-line{font-size:.8rem;color:var(--muted);font-weight:600}
.phead h1{margin:2px 0 4px;font-size:1.6rem;letter-spacing:-.02em}
.phead p{margin:0;color:var(--muted)}

.row{display:grid;gap:16px}
.row.c2{grid-template-columns:1.5fr 1fr}
.row.c3{grid-template-columns:repeat(3,1fr)}
@media(max-width:820px){.row.c2,.row.c3{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.card h3{margin:0 0 2px;font-size:1.02rem}
.card .sub{color:var(--muted);font-size:.84rem;margin-bottom:12px}

/* ring */
.ring{--p:0;--sz:110px;width:var(--sz);height:var(--sz);border-radius:50%;
  background:conic-gradient(var(--green) calc(var(--p)*1%),#e9eef4 0);display:grid;place-items:center}
.ring .in{width:calc(var(--sz) - 20px);height:calc(var(--sz) - 20px);background:#fff;border-radius:50%;display:grid;place-items:center;text-align:center}
.ring .in b{font-size:1.4rem;color:var(--blue-ink);line-height:1}
.ring .in span{font-size:.66rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}

.stat b{font-size:1.3rem;display:block;line-height:1.1}
.stat span{font-size:.76rem;color:var(--muted)}
.stat.done b{color:var(--green)} .stat.streak b{color:var(--amber)}

/* subtle review line (no red, no pressure) */
.rev-quiet{margin-top:12px;font-size:.83rem;color:var(--muted);display:flex;align-items:center;gap:7px}
.rev-quiet .rq{width:7px;height:7px;border-radius:50%;background:var(--faint)}
.rev-quiet a{color:var(--blue);font-weight:600}

/* next up */
.nextup{background:linear-gradient(150deg,var(--blue),var(--blue-ink));color:#fff;border:0}
.nextup .sub{color:#a9cdea}.nextup h3{color:#fff}
.nextup .lz{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:14px;margin:12px 0}
.nextup .lz b{display:block;font-size:1.02rem}.nextup .lz small{color:#bcd7ef}
.btn{display:inline-block;border:0;cursor:pointer;font-family:inherit;font-weight:700;font-size:.9rem;padding:11px 18px;border-radius:10px;text-align:center}
.btn.red{background:var(--red);color:#fff}.btn.blue{background:var(--blue);color:#fff}.btn.green{background:var(--green);color:#fff}
.btn.ghost{background:#fff;color:var(--blue);border:2px solid var(--blue)}.btn.wht{background:#fff;color:var(--blue-ink)}
.btn:hover{filter:brightness(1.04)}
.btn.block{display:block;width:100%}

/* flight-review / placeholder card */
.placeholder{border:1px dashed var(--line);background:#fafcfe;color:var(--muted);border-radius:12px;padding:14px 16px;font-size:.86rem}
.placeholder b{color:var(--blue-ink)}
.tag-soon{background:#fff3dd;color:#b9781a;font-size:.66rem;font-weight:800;padding:2px 7px;border-radius:99px;margin-left:6px}

/* gates */
.gates{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.gate{background:#f6f9fc;border:1px solid var(--line);border-radius:12px;padding:12px 8px;text-align:center}
.gate .g{width:32px;height:32px;margin:0 auto 6px;border-radius:9px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:800}
.gate b{font-size:.8rem;display:block}.gate small{font-size:.66rem;color:var(--muted)}
@media(max-width:820px){.gates{grid-template-columns:repeat(2,1fr)}}

/* module bars */
.mod{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px solid var(--line)}
.mod:last-child{border-bottom:0}
.mod .nm{flex:1}.mod .nm b{font-size:.9rem;font-weight:600}.mod .nm small{color:var(--muted);display:block;font-size:.73rem}
.bar{flex:1.3;height:8px;background:#e9eef4;border-radius:99px;overflow:hidden;max-width:220px}
.bar i{display:block;height:100%;background:var(--green);border-radius:99px}
.mod .pct{width:36px;text-align:right;font-size:.78rem;color:var(--muted);font-weight:700}

/* pills */
.pill{display:inline-block;font-size:.66rem;font-weight:800;padding:2px 8px;border-radius:99px;letter-spacing:.03em}
.pill.l1{background:#e7f0fb;color:var(--blue)}.pill.l2{background:#fff3dd;color:#b9781a}.pill.l3{background:#f0e9fb;color:#6b3fb0}
.pill.ba{background:#e6f5ee;color:var(--green)}.pill.muted{background:#eef1f5;color:var(--muted)}
/* depth legend (explains L1/L2/L3) */
.depthkey{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px 14px;margin-top:12px;font-size:.82rem;color:var(--muted)}
.depthkey>b{color:var(--blue-ink);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
.depthkey .di{display:inline-flex;align-items:center;gap:6px}
.depthkey .di em{font-style:normal;color:var(--faint)}

/* roadmap (dense ok) */
.stage{position:relative;padding-left:38px;margin-bottom:6px}
.stage::before{content:"";position:absolute;left:14px;top:0;bottom:-6px;width:2px;background:var(--line)}
.stage:last-child::before{display:none}
.stage .dot{position:absolute;left:5px;top:2px;width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid var(--blue)}
.stage.done .dot{background:var(--green);border-color:var(--green)}
.stage h4{margin:0 0 2px;font-size:.98rem}.stage .goal{color:var(--muted);font-size:.82rem;margin-bottom:10px}
.lessons{display:grid;gap:8px;grid-template-columns:repeat(2,1fr)}
@media(max-width:820px){.lessons{grid-template-columns:1fr}}
.lrow{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:11px;padding:10px 12px}
.lrow:hover{border-color:var(--blue)}
.lrow .ic{width:20px;height:20px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:.66rem;font-weight:800;background:#eef1f5;color:var(--muted)}
.lrow.learned .ic{background:var(--green);color:#fff}.lrow.learning .ic{background:var(--amber);color:#fff}.lrow.review .ic{background:var(--blue);color:#fff}
.lrow .t{flex:1;font-size:.85rem;font-weight:600;line-height:1.25}
.lrow .t small{display:block;font-weight:500;color:var(--muted);font-size:.71rem}
.lrow .nextflag{font-size:.64rem;font-weight:800;color:#fff;background:var(--red);padding:2px 6px;border-radius:99px}
.basic-done{background:var(--green-soft);border:1px dashed var(--green);color:var(--green);border-radius:12px;padding:10px 14px;font-weight:700;font-size:.85rem;margin:10px 0}

/* ---------- FOCUSED LESSON ---------- */
.lesson{max-width:640px;margin:0 auto;padding-bottom:40px}
.lesson .crumb{color:var(--faint);font-size:.8rem;margin:22px 0 14px}
.lesson .crumb a{color:var(--faint)}
.lesson .kbadge{display:flex;gap:8px;align-items:center;margin-bottom:10px;font-size:.78rem;color:var(--muted)}
.lesson h1{font-family:var(--serif);font-size:1.9rem;line-height:1.15;margin:0 0 18px;letter-spacing:-.01em}
.backbone{background:linear-gradient(150deg,#eef5fc,#e3eefa);border-left:4px solid var(--blue);border-radius:0 12px 12px 0;padding:16px 18px;margin:0 0 22px}
.backbone .lb{font-size:.66rem;font-weight:800;color:var(--blue);letter-spacing:.07em;text-transform:uppercase}
.backbone p{margin:5px 0 0;font-size:1.1rem;font-weight:600;font-family:var(--serif)}
.lesson h2{font-size:1.02rem;margin:24px 0 8px;color:var(--blue-ink)}
.lesson p{margin:0 0 13px;font-size:1.02rem}
.clauses{list-style:none;padding:0;margin:0 0 14px}
.clauses li{display:flex;gap:12px;padding:11px 0;border-bottom:1px solid var(--line)}
.clauses li:last-child{border-bottom:0}
.clauses .num{font-weight:800;color:var(--blue);font-variant-numeric:tabular-nums;white-space:nowrap}
.trap{background:#fdeef0;border-left:4px solid var(--red);border-radius:0 12px 12px 0;padding:13px 16px;margin:16px 0;font-size:.96rem}
.trap b{color:var(--red)}
.src{font-size:.74rem;color:var(--faint);margin-top:6px}

/* secondary (kept out of the way for focus) */
.secondary{margin-top:30px;border-top:1px solid var(--line);padding-top:8px}
details.fold{border-bottom:1px solid var(--line)}
details.fold>summary{list-style:none;cursor:pointer;padding:14px 2px;font-weight:700;font-size:.92rem;color:var(--blue-ink);display:flex;align-items:center;gap:8px}
details.fold>summary::-webkit-details-marker{display:none}
details.fold>summary .ct{margin-left:auto;color:var(--faint);font-weight:600;font-size:.8rem}
details.fold>summary::before{content:"▸";color:var(--faint);font-size:.8rem}
details.fold[open]>summary::before{content:"▾"}
.fold .body{padding:2px 2px 16px}

/* review cards */
.rev-card{border:1px solid var(--line);border-radius:12px;padding:13px 15px;margin-bottom:9px;background:#fff}
.rev-card .q{font-weight:600;font-size:.95rem}
.rev-card .a{margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);display:none}
.rev-card.show .a{display:block}
.rev-card .reveal{margin-top:8px;font-size:.8rem;color:var(--blue);cursor:pointer;font-weight:700}
.needval{background:#fff7e6;border:1px dashed var(--amber);color:#946200;border-radius:8px;padding:1px 7px;font-size:.74rem;font-weight:700}
.grade{display:none;gap:8px;margin-top:10px}.rev-card.show .grade{display:flex}
.grade button{flex:1;border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px;font-weight:700;font-size:.78rem;cursor:pointer}
.grade .again:hover{background:#fdeef0;border-color:var(--red)}.grade .good:hover{background:var(--green-soft);border-color:var(--green)}

.related a{display:block;padding:9px 0;border-bottom:1px solid var(--line)}
.related a:last-child{border-bottom:0}
.related b{font-size:.88rem}.related small{color:var(--muted);font-size:.76rem;display:block}
.nextnav{display:block;margin-top:22px;padding:14px 16px;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:inherit}
.nextnav:hover{border-color:currentColor}
.nextnav small{display:block;color:var(--muted);font-size:.76rem;margin-bottom:2px}
.nextnav b{font-size:.98rem}

/* sticky action bar */
.actionbar{position:sticky;bottom:0;background:rgba(255,255,255,.94);backdrop-filter:blur(6px);border-top:1px solid var(--line);margin-top:24px;padding:12px 0}
.actionbar .wrap{display:flex;gap:10px;align-items:center;max-width:640px}
.actionbar .st{margin-right:auto;font-size:.83rem;color:var(--muted)}

/* ---------- GLOSSARY ---------- */
.term{border-bottom:1px dotted var(--blue);color:var(--blue-ink);cursor:help;font-weight:600}
.glosspop{position:fixed;z-index:80;max-width:280px;background:#0f2136;color:#eaf2fb;border-radius:12px;padding:12px 14px;
  box-shadow:var(--shadow-lg);font-size:.85rem;line-height:1.45;display:none}
.glosspop.show{display:block}
.glosspop b{color:#fff;display:block;margin-bottom:3px;font-size:.9rem}
.glosspop .tc{color:#8fb4d6;font-size:.7rem;text-transform:uppercase;letter-spacing:.05em}

/* ---------- MAP ---------- */
.mapwrap{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow)}
.decision{max-width:520px;margin:0 auto 18px;text-align:center;background:var(--blue-ink);color:#fff;border-radius:12px;padding:14px}
.decision b{font-size:1.05rem}
.gaterow{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-bottom:18px}
@media(max-width:820px){.gaterow{grid-template-columns:repeat(2,1fr)}}
.gcol{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.gcol .h{background:var(--blue);color:#fff;padding:9px;text-align:center;font-weight:700;font-size:.82rem}
.gcol .h small{display:block;font-weight:500;color:#bcd7ef;font-size:.66rem}
.gcol .b{padding:8px;display:grid;gap:6px}
.gcol .m{font-size:.74rem;background:#f6f9fc;border:1px solid var(--line);border-radius:8px;padding:6px 8px;color:var(--ink)}
.flow{background:#f6f9fc;border:1px dashed var(--line);border-radius:12px;padding:12px 16px;font-size:.86rem;color:var(--muted);text-align:center}
.flow b{color:var(--blue-ink)}

/* ---------- REVIEW (calm) ---------- */
.calm{max-width:560px;margin:40px auto;text-align:center}
.calm .big{font-size:2.4rem;font-weight:800;color:var(--blue-ink)}
.calm p{color:var(--muted)}
.calm .note{font-size:.85rem;color:var(--faint);margin-top:18px}

/* ---------- FORMS (about / ask) ---------- */
.form{max-width:560px}
.form label{display:block;font-weight:700;font-size:.85rem;margin:14px 0 5px}
.form input,.form textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-family:inherit;font-size:.95rem;background:#fff}
.form textarea{min-height:130px;resize:vertical}
.form .hint{font-size:.78rem;color:var(--faint);margin-top:4px}
.notice{background:#eef5fc;border:1px solid #cfe2f5;color:var(--blue-dark);border-radius:10px;padding:10px 13px;font-size:.83rem;margin-top:14px}

.prose h2{color:var(--blue-ink);font-size:1.15rem;margin:22px 0 8px}
.prose p{margin:0 0 12px}
.disc{background:#f6f9fc;border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:.82rem;color:var(--muted);margin-top:16px}
.disc b{color:var(--ink)}

footer.ft{padding:28px 0;color:var(--faint);font-size:.79rem;text-align:center;margin-top:26px}
/* spec v2: worked example */
.worked{background:#eef5fc;border-left:4px solid var(--blue,#005A9C);border-radius:0 12px 12px 0;padding:13px 16px 6px;margin:16px 0;font-size:.96rem}
.worked .lb{font-size:.72rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--blue,#005A9C);margin-bottom:6px}
.worked p{margin:0 0 10px}.worked ol{margin:0 0 10px;padding-left:22px}.worked li{margin:0 0 6px}
.lesson ul:not(.clauses){margin:0 0 13px;padding-left:22px}.lesson ul:not(.clauses) li{margin:0 0 6px}
/* spec v2: figures */
.fig{margin:14px 0 16px;background:#fff;border:1px solid var(--line,#e2e8f0);border-radius:12px;padding:10px}
.fig img{display:block;width:100%;height:auto;border-radius:6px}
.fig figcaption{font-size:.84rem;color:var(--muted,#5d6b7a);margin-top:8px;line-height:1.45}
.worked .fig{background:#fff}