:root{
  --bg:#0a0f1c; --bg-2:#0f1830; --card:#111b34; --ink:#e9eefb; --muted:#9fb0cf;
  --blue:#2f6bff; --violet:#7c5cff; --cyan:#39d1ff; --green:#39d98a; --amber:#f5b544; --red:#ff6b6b;
  --line:rgba(255,255,255,.1); --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,h4{font-family:Sora,system-ui,sans-serif;line-height:1.15;letter-spacing:-.02em}
a{color:var(--cyan);text-decoration:none}
p a{text-decoration:underline;text-underline-offset:2px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:rgba(255,255,255,.07);border:1px solid var(--line);padding:.08rem .38rem;border-radius:6px;font-size:.88em;color:#cfe0ff}
.wrap{width:min(880px,92vw);margin-inline:auto}
.wrap-wide{width:min(1120px,92vw);margin-inline:auto}
.btn{display:inline-flex;align-items:center;gap:.5rem;font-weight:600;padding:.9rem 1.4rem;border-radius:12px;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s,opacity .15s;min-height:46px;border:1px solid transparent;color:#fff;font-size:1rem;font-family:inherit}
.btn:focus-visible{outline:3px solid var(--violet);outline-offset:3px}
.btn-p{background:linear-gradient(120deg,var(--blue),var(--violet));box-shadow:0 14px 30px -12px rgba(124,92,255,.7)}
.btn-p:hover{transform:translateY(-2px)}
.btn-o{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-o:hover{background:rgba(255,255,255,.06)}
.btn[disabled],.btn.locked{opacity:.45;cursor:not-allowed;box-shadow:none;transform:none}

header{position:sticky;top:0;z-index:50;background:rgba(10,15,28,.72);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;padding:.85rem 0;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;font-family:Sora;font-weight:800;font-size:1.12rem;color:var(--ink)}
.brand .m{width:34px;height:34px;border-radius:10px;background:linear-gradient(120deg,var(--blue),var(--violet));display:grid;place-items:center;font-weight:800;color:#fff}
.nav-right{display:flex;align-items:center;gap:1rem;font-size:.92rem}
.nav-right a{color:var(--muted)}
.nav-right a:hover{color:var(--ink)}

.hero{position:relative;padding:4rem 0 2rem;overflow:hidden}
.glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.45;z-index:0}
.g1{width:480px;height:480px;background:var(--violet);top:-160px;left:-120px}
.g2{width:440px;height:440px;background:var(--blue);top:-120px;right:-140px}
.hero>*{position:relative;z-index:2}
.crumbs{font-size:.82rem;color:var(--muted);margin-bottom:1.1rem}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--ink)}
.tag{display:inline-flex;align-items:center;gap:.5rem;font-size:.76rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#c9d4f0;background:rgba(255,255,255,.06);border:1px solid var(--line);padding:.42rem .85rem;border-radius:999px;margin-bottom:1.2rem}
.tag .dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 12px var(--green)}
.hero h1{font-size:clamp(2.1rem,5.2vw,3.4rem);font-weight:800;margin-bottom:1.1rem}
.hero h1 .grad{background:linear-gradient(120deg,#7c5cff,#2f6bff 55%,#39d1ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:#c7d3ee;font-size:1.18rem;max-width:44rem}
.hero .row{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.8rem}
.meta{display:flex;gap:1.4rem;flex-wrap:wrap;color:var(--muted);font-size:.88rem;margin-top:1.6rem}
.meta b{color:var(--ink)}

main{padding:1rem 0 2rem}
section{padding:2rem 0}
h2{font-size:clamp(1.5rem,3.4vw,2rem);margin-bottom:.5rem}
.sub{color:var(--muted);margin-bottom:1.6rem;font-size:1.02rem}
h3{font-size:1.18rem;margin-bottom:.4rem}
p{margin-bottom:1rem;color:#d4ddf0}
.section-eye{font-size:.76rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--cyan);margin-bottom:.5rem}

.callout{border-radius:var(--radius);padding:1.2rem 1.35rem;margin:1.3rem 0;border:1px solid var(--line);background:var(--card);display:flex;gap:1rem;align-items:flex-start}
.callout .ic{flex:none;width:34px;height:34px;border-radius:9px;display:grid;place-items:center;margin-top:.1rem;font-family:Sora;font-weight:800;font-size:1.15rem}
.callout h4{font-size:1.03rem;margin-bottom:.3rem}
.callout p{margin-bottom:0;font-size:.96rem}
.callout.warn{border-color:rgba(245,181,68,.35);background:linear-gradient(180deg,rgba(245,181,68,.09),rgba(245,181,68,.03))}
.callout.warn .ic{background:rgba(245,181,68,.16);color:var(--amber)}
.callout.good{border-color:rgba(57,217,138,.32);background:linear-gradient(180deg,rgba(57,217,138,.08),rgba(57,217,138,.02))}
.callout.good .ic{background:rgba(57,217,138,.16);color:var(--green)}
.callout.info{border-color:rgba(47,107,255,.32);background:linear-gradient(180deg,rgba(47,107,255,.08),rgba(47,107,255,.02))}
.callout.info .ic{background:rgba(47,107,255,.16);color:var(--cyan)}
.callout.benefit{border-color:rgba(124,92,255,.4);background:linear-gradient(180deg,rgba(124,92,255,.12),rgba(57,209,255,.04))}
.callout.benefit .ic{background:rgba(124,92,255,.2);color:var(--violet)}
.callout.benefit h4{color:#fff}

.steps{display:flex;flex-direction:column;gap:1rem;counter-reset:step}
.step{position:relative;border:1px solid var(--line);background:var(--bg-2);border-radius:var(--radius);padding:1.3rem 1.4rem 1.3rem 4.2rem;counter-increment:step}
.step::before{content:counter(step);position:absolute;left:1.2rem;top:1.2rem;width:2.1rem;height:2.1rem;border-radius:10px;background:linear-gradient(120deg,var(--blue),var(--violet));color:#fff;font-family:Sora;font-weight:800;display:grid;place-items:center;font-size:1.05rem}
.step h3{margin-bottom:.4rem}
.step p:last-child{margin-bottom:0}

ul.checklist{border:1px solid var(--line);background:var(--card);border-radius:var(--radius);padding:1.3rem 1.5rem;margin:1rem 0}
ul.checklist li{list-style:none;padding:.5rem 0 .5rem 2rem;position:relative;border-bottom:1px solid var(--line);color:#d9e2f4}
ul.checklist li:last-child{border-bottom:0}
ul.checklist li::before{content:"";position:absolute;left:0;top:.72rem;width:18px;height:18px;border-radius:5px;background:rgba(57,217,138,.16);border:1px solid var(--green)}
ul.checklist li::after{content:"";position:absolute;left:6px;top:.84rem;width:5px;height:9px;border-right:2px solid var(--green);border-bottom:2px solid var(--green);transform:rotate(45deg)}

.two{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.2rem 0}
@media(max-width:720px){.two{grid-template-columns:1fr}}
.do,.dont{border-radius:14px;padding:1.2rem 1.3rem;border:1px solid var(--line)}
.do{background:linear-gradient(180deg,rgba(57,217,138,.08),rgba(57,217,138,.02));border-color:rgba(57,217,138,.3)}
.dont{background:linear-gradient(180deg,rgba(255,90,90,.08),rgba(255,90,90,.02));border-color:rgba(255,90,90,.32)}
.do h4,.dont h4{font-size:1rem;margin-bottom:.7rem;display:flex;align-items:center;gap:.5rem}
.do h4 span{color:var(--green)}.dont h4 span{color:var(--red)}
.do ul,.dont ul{list-style:none;display:flex;flex-direction:column;gap:.5rem}
.do li,.dont li{font-size:.92rem;padding-left:1.3rem;position:relative;color:#d4ddf0}
.do li::before{content:"+";position:absolute;left:0;color:var(--green);font-weight:800}
.dont li::before{content:"x";position:absolute;left:0;color:var(--red);font-weight:800}

.path{border-radius:14px;padding:1.2rem 1.3rem;border:1px solid var(--line);background:var(--bg-2)}
.path.a{border-color:rgba(57,217,138,.3);background:linear-gradient(180deg,rgba(57,217,138,.07),rgba(57,217,138,.02))}
.path.b{border-color:rgba(47,107,255,.32);background:linear-gradient(180deg,rgba(47,107,255,.08),rgba(47,107,255,.02))}
.path .ptag{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;display:inline-block;padding:.18rem .55rem;border-radius:6px;margin-bottom:.6rem}
.path.a .ptag{color:#9df3c4;background:rgba(57,217,138,.16);border:1px solid rgba(57,217,138,.3)}
.path.b .ptag{color:#bcd3ff;background:rgba(47,107,255,.16);border:1px solid rgba(47,107,255,.3)}
.path h4{font-size:1.05rem;margin-bottom:.5rem}
.path p{font-size:.94rem;margin-bottom:0}
.path ul{margin:.5rem 0 0 1.05rem}
.path li{font-size:.9rem;margin-bottom:.35rem;color:#d4ddf0}

/* Takeaways */
.takeaways{border:1px solid rgba(57,217,138,.3);background:linear-gradient(180deg,rgba(57,217,138,.07),rgba(57,217,138,.02));border-radius:var(--radius);padding:1.5rem 1.6rem;margin-top:1rem}
.takeaways h3{font-size:1.1rem;margin-bottom:.9rem;display:flex;align-items:center;gap:.55rem}
.takeaways h3 .ic{width:26px;height:26px;border-radius:7px;background:rgba(57,217,138,.16);color:var(--green);display:grid;place-items:center;font-weight:800}
.takeaways ul{list-style:none;display:flex;flex-direction:column;gap:.6rem}
.takeaways li{position:relative;padding-left:1.6rem;color:#dce6f5;font-size:.98rem}
.takeaways li::before{content:"";position:absolute;left:0;top:.55rem;width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green)}

/* ============ QUIZ ============ */
.quiz-wrap{border:1px solid var(--line);background:var(--card);border-radius:var(--radius);padding:1.6rem 1.6rem 1.8rem;margin-top:1rem}
.quiz-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:1.2rem}
.quiz-head h3{font-size:1.15rem;margin:0}
.quiz-badge{font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#bcd3ff;background:rgba(47,107,255,.16);border:1px solid rgba(47,107,255,.3);padding:.28rem .6rem;border-radius:999px}
.quiz-badge.done{color:#9df3c4;background:rgba(57,217,138,.16);border-color:rgba(57,217,138,.35)}
.qlist{list-style:none;counter-reset:qq;display:flex;flex-direction:column;gap:1.3rem}
.q{counter-increment:qq;border-bottom:1px solid var(--line);padding-bottom:1.2rem}
.q:last-of-type{border-bottom:0;padding-bottom:0}
.qtext{font-weight:600;color:var(--ink);margin-bottom:.7rem;font-size:1.02rem}
.qtext::before{content:counter(qq) ". ";color:var(--cyan);font-weight:800}
.opts{display:flex;flex-direction:column;gap:.5rem}
.opts label{display:flex;align-items:flex-start;gap:.7rem;padding:.75rem .9rem;border:1px solid var(--line);border-radius:11px;cursor:pointer;background:var(--bg-2);transition:border-color .12s,background .12s;min-height:44px}
.opts label:hover{border-color:var(--violet)}
.opts input{margin-top:.25rem;accent-color:var(--violet);width:17px;height:17px;flex:none}
.opts label span{color:#d4ddf0;font-size:.96rem}
.q.correct label.picked{border-color:var(--green);background:linear-gradient(180deg,rgba(57,217,138,.12),rgba(57,217,138,.03))}
.q.wrong label.picked{border-color:var(--red);background:linear-gradient(180deg,rgba(255,90,90,.12),rgba(255,90,90,.03))}
.q.wrong label.answer{border-color:var(--green)}
.q.wrong label.answer span::after{content:" (correct answer)";color:var(--green);font-weight:700;font-size:.85em}
.explain{margin:.7rem 0 0;font-size:.92rem;color:var(--muted);padding:.7rem .9rem;border-radius:10px;background:rgba(255,255,255,.03);border:1px solid var(--line)}
.explain b{color:var(--ink)}
.quiz-actions{display:flex;align-items:center;gap:.8rem;flex-wrap:wrap;margin-top:1.4rem}
.result{font-weight:600;font-size:1rem;padding:.6rem 0}
.result.pass{color:var(--green)}
.result.fail{color:var(--amber)}

.pager{display:grid;grid-template-columns:1fr 1fr;gap:.9rem;margin-top:1.6rem}
@media(max-width:620px){.pager{grid-template-columns:1fr}}
.pager a{display:flex;flex-direction:column;gap:.15rem;border:1px solid var(--line);background:var(--bg-2);border-radius:14px;padding:1rem 1.2rem;color:var(--ink);transition:border-color .15s,transform .15s}
.pager a:hover{border-color:var(--violet);transform:translateY(-2px)}
.pager a.next{text-align:right}
.pager a.locked{opacity:.5;pointer-events:none}
.pager .lbl{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.pager .ttl{font-family:Sora;font-weight:700;font-size:1rem}
.pager .lock-note{font-size:.75rem;color:var(--amber);margin-top:.2rem}

/* ============ HUB ============ */
.progress-card{border:1px solid var(--line);background:var(--card);border-radius:var(--radius);padding:1.4rem 1.6rem;margin-bottom:1.6rem}
.progress-top{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:.9rem}
.progress-top h2{margin:0;font-size:1.2rem}
.progress-count{font-family:Sora;font-weight:800;font-size:1.05rem;color:var(--cyan)}
.pbar{height:12px;border-radius:999px;background:var(--bg-2);border:1px solid var(--line);overflow:hidden}
.pbar>span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--blue),var(--violet),var(--cyan));border-radius:999px;transition:width .5s ease}
.progress-actions{margin-top:1rem;display:flex;gap:.7rem;flex-wrap:wrap}
.reset-link{background:none;border:0;color:var(--muted);font:inherit;font-size:.82rem;cursor:pointer;text-decoration:underline;text-underline-offset:2px}
.reset-link:hover{color:var(--ink)}

.modgrid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media(max-width:760px){.modgrid{grid-template-columns:1fr}}
.modcard{position:relative;display:flex;gap:1rem;border:1px solid var(--line);background:var(--bg-2);border-radius:var(--radius);padding:1.25rem 1.3rem;color:var(--ink);transition:border-color .15s,transform .15s;align-items:flex-start}
.modcard:hover{border-color:var(--violet);transform:translateY(-3px)}
.modcard .num{flex:none;width:2.5rem;height:2.5rem;border-radius:11px;background:linear-gradient(120deg,var(--blue),var(--violet));display:grid;place-items:center;font-family:Sora;font-weight:800;font-size:1.1rem;color:#fff}
.modcard .body{flex:1;min-width:0}
.modcard .eye{font-size:.68rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);margin-bottom:.2rem}
.modcard h3{font-size:1.08rem;margin-bottom:.3rem}
.modcard p{font-size:.88rem;color:var(--muted);margin:0}
.modcard .stat{position:absolute;top:1rem;right:1.1rem;font-size:1.2rem;line-height:1}
.modcard .mins{font-size:.78rem;color:var(--muted);margin-top:.5rem;display:inline-flex;align-items:center;gap:.35rem}
.modcard.done .num{background:linear-gradient(120deg,var(--green),#2fb56f)}
.modcard.done .stat{color:var(--green)}
.modcard.locked{opacity:.5;pointer-events:none}
.modcard.locked .num{background:var(--bg);border:1px solid var(--line);color:var(--muted)}
.modcard.locked .stat{color:var(--muted)}

.cta{margin:2.5rem 0 0;border-radius:24px;padding:2.4rem 2rem;text-align:center;background:linear-gradient(120deg,rgba(47,107,255,.16),rgba(124,92,255,.16));border:1px solid var(--line);position:relative;overflow:hidden}
.cta h2{margin-bottom:.6rem}
.cta p{max-width:38rem;margin:0 auto 1.4rem;color:#c7d3ee}
.cta .row{display:flex;gap:.7rem;justify-content:center;flex-wrap:wrap}

footer{padding:3rem 0 3.4rem;text-align:center;color:var(--muted);font-size:.85rem;border-top:1px solid var(--line);margin-top:2rem}
footer .links{display:flex;gap:1.2rem;justify-content:center;flex-wrap:wrap;margin-bottom:1rem}
footer .links a{color:var(--muted)}
footer .links a:hover{color:var(--ink)}
footer .disc{max-width:44rem;margin:1rem auto 0;font-size:.76rem;color:#6b7a99;line-height:1.6}