/* ░░░░░░░░░░ FURYHACK — styles ░░░░░░░░░░ */
:root{
  --bg:#08080c;
  --bg-2:#0d0d14;
  --bg-3:#12121c;
  --line:rgba(255,255,255,.08);
  --txt:#eceaf2;
  --muted:#9a98a8;
  --fire-1:#ff2d1f;
  --fire-2:#ff7a00;
  --fire-3:#ffb627;
  --fire:linear-gradient(135deg,#ff2d1f 0%,#ff7a00 60%,#ffb627 100%);
  --radius:16px;
  --maxw:1140px;
  --mono:'JetBrains Mono',ui-monospace,Menlo,monospace;
  --sans:'Sora',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--txt);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,h5{line-height:1.15;font-weight:800;letter-spacing:-.02em}
.grad{background:var(--fire);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* buttons */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:999px;font-weight:700;font-size:.98rem;
  cursor:pointer;border:1px solid transparent;transition:.25s;white-space:nowrap;
}
.btn--sm{padding:9px 18px;font-size:.88rem}
.btn--fire{background:var(--fire);color:#1a0a00;box-shadow:0 8px 30px rgba(255,90,0,.35)}
.btn--fire:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(255,90,0,.5)}
.btn--ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--txt)}
.btn--ghost:hover{background:rgba(255,255,255,.09);border-color:rgba(255,120,0,.5)}

/* nav */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:rgba(8,8,12,.7);border-bottom:1px solid var(--line);transition:.3s}
.nav.scrolled{background:rgba(8,8,12,.92)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.25rem;letter-spacing:.02em}
.logo__mark{filter:drop-shadow(0 0 10px rgba(255,90,0,.7))}
.logo__accent{background:var(--fire);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav__links{display:flex;align-items:center;gap:28px}
.nav__links a{color:var(--muted);font-size:.95rem;font-weight:600;transition:.2s}
.nav__links a:hover{color:var(--txt)}
.nav__links .btn{color:var(--txt)}
.nav__burger{display:none;background:none;border:none;color:var(--txt);font-size:1.5rem;cursor:pointer}

/* hero */
.hero{position:relative;padding:90px 0 70px;overflow:hidden}
.hero__glow{position:absolute;top:-220px;left:50%;transform:translateX(-50%);
  width:900px;height:700px;background:radial-gradient(ellipse at center,rgba(255,80,0,.22),transparent 60%);
  filter:blur(40px);pointer-events:none}
.hero__inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;
  background:rgba(255,120,0,.1);border:1px solid rgba(255,120,0,.3);color:var(--fire-3);
  font-size:.82rem;font-weight:600;font-family:var(--mono);margin-bottom:24px}
.badge__dot{width:8px;height:8px;border-radius:50%;background:var(--fire-2);box-shadow:0 0 10px var(--fire-2);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero__title{font-size:clamp(2.3rem,5.2vw,4rem);margin-bottom:22px}
.hero__sub{font-size:1.12rem;color:var(--muted);max-width:520px;margin-bottom:32px}
.hero__cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.hero__tagline{font-family:var(--mono);color:var(--fire-2);font-size:.9rem;opacity:.8}

/* terminal */
.terminal{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.6);font-family:var(--mono)}
.terminal__bar{display:flex;align-items:center;gap:7px;padding:12px 15px;background:#15151f;border-bottom:1px solid var(--line)}
.dot{width:12px;height:12px;border-radius:50%}
.dot--r{background:#ff5f57}.dot--y{background:#febc2e}.dot--g{background:#28c840}
.terminal__title{margin-left:10px;color:var(--muted);font-size:.8rem}
.terminal__body{padding:20px;font-size:.86rem;line-height:1.7;min-height:268px;white-space:pre-wrap;color:#cfe0d8}
.t-prompt{color:var(--fire-2)}.t-cmd{color:#fff}.t-ok{color:#28c840}.t-warn{color:var(--fire-3)}.t-dim{color:var(--muted)}
.cursor{display:inline-block;width:9px;height:1.05em;background:var(--fire-2);vertical-align:-2px;animation:blink 1s steps(2) infinite}
@keyframes blink{50%{opacity:0}}

/* marquee */
.marquee{border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-2);overflow:hidden;padding:16px 0}
.marquee__track{display:flex;gap:26px;white-space:nowrap;width:max-content;
  animation:scroll 28s linear infinite;font-family:var(--mono);font-size:.82rem;
  letter-spacing:.12em;color:var(--muted)}
.marquee__track span:not(:nth-child(2n)){color:var(--fire-3)}
@keyframes scroll{to{transform:translateX(-50%)}}

/* sections */
.section{padding:96px 0}
.section--alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section__head{max-width:660px;margin:0 auto 54px;text-align:center}
.eyebrow{font-family:var(--mono);color:var(--fire-2);font-size:.85rem;font-weight:700;letter-spacing:.05em}
.section__head h2{font-size:clamp(1.9rem,4vw,2.8rem);margin:14px 0 16px}
.section__head p{color:var(--muted);font-size:1.08rem}
.section__note{text-align:center;margin-top:40px;color:var(--muted);font-family:var(--mono);font-size:.9rem}

/* grid */
.grid{display:grid;gap:24px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

/* cards */
.card{background:var(--bg-3);border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.3s}
.card:hover{transform:translateY(-5px);border-color:rgba(255,120,0,.4);box-shadow:0 20px 50px rgba(0,0,0,.5)}
.track__icon{font-size:2.2rem;margin-bottom:16px}
.track h3{font-size:1.3rem;margin-bottom:10px}
.track p{color:var(--muted);font-size:.96rem;margin-bottom:18px}
.track--featured{border-color:rgba(255,120,0,.5);background:linear-gradient(180deg,rgba(255,90,0,.08),var(--bg-3))}
.ticks{list-style:none;margin-bottom:20px}
.ticks li{position:relative;padding-left:26px;color:var(--txt);font-size:.92rem;margin-bottom:9px}
.ticks li::before{content:"▸";position:absolute;left:6px;color:var(--fire-2);font-weight:700}
.track__tag{display:inline-block;font-family:var(--mono);font-size:.74rem;padding:5px 12px;border-radius:999px;
  background:rgba(255,120,0,.12);color:var(--fire-3);border:1px solid rgba(255,120,0,.25)}

/* features */
.feature{padding:8px}
.feature__icon{display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:12px;
  background:rgba(255,120,0,.1);border:1px solid rgba(255,120,0,.25);font-size:1.5rem;margin-bottom:16px}
.feature h4{font-size:1.1rem;margin-bottom:8px}
.feature p{color:var(--muted);font-size:.93rem}

/* certs */
.cert{background:var(--bg-3);border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;text-align:center;transition:.3s}
.cert:hover{transform:translateY(-5px);border-color:rgba(255,120,0,.45)}
.cert__seal{width:64px;height:64px;margin:0 auto 20px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-weight:700;font-size:1.3rem;color:#1a0a00;background:var(--fire);
  box-shadow:0 0 24px rgba(255,90,0,.45)}
.cert h3{font-size:1.12rem;line-height:1.35}
.cert__code{font-family:var(--mono);color:var(--fire-2);font-size:.85rem;margin-top:12px;letter-spacing:.05em}

/* waitlist */
.waitlist{position:relative;padding:100px 0;text-align:center;overflow:hidden}
.waitlist__glow{position:absolute;inset:0;background:radial-gradient(ellipse at center,rgba(255,80,0,.16),transparent 65%);pointer-events:none}
.waitlist__inner{position:relative;max-width:620px}
.waitlist h2{font-size:clamp(2rem,4.5vw,3rem);margin:14px 0 16px}
.waitlist p{color:var(--muted);font-size:1.1rem;margin-bottom:30px}
.waitlist__form{display:flex;gap:12px;max-width:480px;margin:0 auto;flex-wrap:wrap}
.waitlist__form input{flex:1;min-width:220px;padding:15px 20px;border-radius:999px;
  background:var(--bg-3);border:1px solid var(--line);color:var(--txt);font-size:1rem;font-family:var(--sans)}
.waitlist__form input:focus{outline:none;border-color:var(--fire-2);box-shadow:0 0 0 3px rgba(255,120,0,.18)}
.waitlist__msg{min-height:24px;margin-top:16px;font-weight:600;font-family:var(--mono);font-size:.9rem}
.waitlist__msg.ok{color:#28c840}.waitlist__msg.err{color:var(--fire-1)}
.waitlist__fine{color:var(--muted);font-size:.85rem;margin-top:10px}

/* footer */
.footer{background:var(--bg-2);border-top:1px solid var(--line);padding:60px 0 30px}
.footer__inner{display:grid;grid-template-columns:1.3fr 2fr;gap:40px;margin-bottom:40px}
.footer__brand .logo__text{font-size:1.4rem;font-weight:800}
.footer__brand p{color:var(--muted);margin-top:10px;font-size:.92rem;max-width:300px}
.footer__cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer__cols h5{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--fire-2);margin-bottom:14px;font-family:var(--mono)}
.footer__cols a{display:block;color:var(--muted);font-size:.92rem;margin-bottom:9px;transition:.2s}
.footer__cols a:hover{color:var(--txt)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;
  padding-top:24px;border-top:1px solid var(--line)}
.footer__bottom p{color:var(--muted);font-size:.82rem}
.footer__tag{font-family:var(--mono);color:var(--fire-2)!important;opacity:.8}

/* responsive */
@media(max-width:900px){
  .hero__inner{grid-template-columns:1fr;gap:40px}
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .nav__links{display:none}
  .nav__links.open{display:flex;position:absolute;top:68px;left:0;right:0;flex-direction:column;
    background:var(--bg-2);padding:20px 24px;border-bottom:1px solid var(--line);gap:18px}
  .nav__burger{display:block}
}
@media(max-width:680px){
  .grid--3,.grid--4{grid-template-columns:1fr}
  .footer__inner{grid-template-columns:1fr}
  .footer__cols{grid-template-columns:repeat(3,1fr)}
  .section{padding:64px 0}
}

/* ░░░░░░░░░░ subpages ░░░░░░░░░░ */
.page-hero{position:relative;padding:56px 0 30px;overflow:hidden;border-bottom:1px solid var(--line)}
.page-hero__glow{position:absolute;top:-200px;left:30%;width:700px;height:560px;
  background:radial-gradient(ellipse at center,rgba(255,80,0,.16),transparent 60%);filter:blur(40px);pointer-events:none}
.page-hero h1{font-size:clamp(2rem,4.5vw,3rem);margin:8px 0 14px}
.page-hero>.container>p{color:var(--muted);font-size:1.08rem;max-width:620px}
.crumb{font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.crumb a{color:var(--fire-2)}.crumb span{margin:0 6px;opacity:.5}

/* filter chips */
.filter{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.chip{padding:9px 18px;border-radius:999px;background:var(--bg-3);border:1px solid var(--line);
  color:var(--muted);font-family:var(--mono);font-size:.84rem;font-weight:600;cursor:pointer;transition:.2s}
.chip:hover{color:var(--txt);border-color:rgba(255,120,0,.4)}
.chip--on{background:var(--fire);color:#1a0a00;border-color:transparent}

/* course cards */
.course-card{display:flex;flex-direction:column;gap:10px}
.course-card__top{display:flex;align-items:center;justify-content:space-between}
.course-card__icon{font-size:1.8rem}
.course-card h3{font-size:1.16rem}
.course-card p{color:var(--muted);font-size:.92rem;flex:1}
.course-card--feat{border-color:rgba(255,120,0,.5);background:linear-gradient(180deg,rgba(255,90,0,.07),var(--bg-3))}
.course-meta{display:flex;justify-content:space-between;font-family:var(--mono);font-size:.78rem;color:var(--muted);
  padding-top:12px;border-top:1px solid var(--line)}
.pill{font-family:var(--mono);font-size:.68rem;font-weight:700;padding:4px 10px;border-radius:6px;
  background:rgba(255,120,0,.14);color:var(--fire-3);border:1px solid rgba(255,120,0,.3);letter-spacing:.05em}
.pill--free{background:rgba(40,200,64,.14);color:#3ad860;border-color:rgba(40,200,64,.3)}
.pill--soon{background:rgba(255,255,255,.06);color:var(--muted);border-color:var(--line)}
.empty{text-align:center;color:var(--muted);font-family:var(--mono);padding:40px}

/* course detail */
.page-hero--course{padding-bottom:40px}
.course-head__sub{color:var(--muted);font-size:1.1rem;max-width:680px;margin:16px 0 22px}
.course-head .track__tag{margin-top:10px}
.course-stats{display:flex;gap:22px;flex-wrap:wrap;font-family:var(--mono);font-size:.85rem;color:var(--txt)}
.course-layout{display:grid;grid-template-columns:1fr 340px;gap:40px;align-items:start}
.block-title{font-size:1.5rem;margin:0 0 22px}
.course-main .block-title:not(:first-child){margin-top:48px}
.learn-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.learn{background:var(--bg-3);border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:.93rem}
.lab-callout{display:flex;gap:18px;align-items:center;margin-top:34px;padding:24px;
  background:linear-gradient(135deg,rgba(255,90,0,.1),rgba(255,120,0,.03));border:1px solid rgba(255,120,0,.3);border-radius:var(--radius)}
.lab-callout__icon{font-size:2.4rem}
.lab-callout h3{font-size:1.2rem;margin-bottom:6px}
.lab-callout p{color:var(--muted);font-size:.95rem}

/* curriculum */
.curriculum{display:flex;flex-direction:column;gap:12px}
.module{background:var(--bg-3);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.module summary{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;cursor:pointer;
  font-weight:700;font-size:1.02rem;list-style:none}
.module summary::-webkit-details-marker{display:none}
.module summary::before{content:"+";color:var(--fire-2);font-weight:700;margin-right:12px;font-size:1.2rem;transition:.2s}
.module[open] summary::before{transform:rotate(45deg)}
.module summary span:first-of-type{flex:1}
.module__count{font-family:var(--mono);font-size:.78rem;color:var(--muted);font-weight:400}
.lesson{display:flex;align-items:center;gap:12px;padding:13px 22px 13px 50px;border-top:1px solid var(--line);
  color:var(--txt);font-size:.93rem}
.lesson__ic{color:var(--fire-2)}
.lesson__free{margin-left:auto;font-family:var(--mono);font-size:.7rem;color:#3ad860;border:1px solid rgba(40,200,64,.3);
  padding:2px 8px;border-radius:5px}

/* enroll sidebar */
.enroll{position:sticky;top:90px;display:flex;flex-direction:column;gap:16px}
.enroll__box{background:var(--bg-3);border:1px solid rgba(255,120,0,.3);border-radius:var(--radius);padding:26px}
.enroll__price{display:flex;align-items:baseline;gap:8px;margin-bottom:6px}
.enroll__cur{font-size:1.4rem;color:var(--txt)}
.enroll__num{font-size:3rem;font-weight:800}
.enroll__old{color:var(--muted);text-decoration:line-through;font-size:1.1rem}
.enroll__note{color:var(--fire-3);font-size:.85rem;font-family:var(--mono);margin-bottom:18px}
.enroll__btn{width:100%;justify-content:center;margin-bottom:20px}
.enroll__includes{list-style:none;display:flex;flex-direction:column;gap:10px}
.enroll__includes li{color:var(--txt);font-size:.9rem}
.enroll__cert{display:flex;align-items:center;gap:14px;background:var(--bg-3);border:1px solid var(--line);
  border-radius:var(--radius);padding:18px 22px}
.enroll__cert .cert__seal{width:48px;height:48px;font-size:1rem;margin:0;flex-shrink:0}
.enroll__cert p{color:var(--muted);font-size:.86rem}

/* prose / legal */
.prose{max-width:760px}
.prose h2{font-size:1.4rem;margin:34px 0 12px}
.prose h2:first-child{margin-top:0}
.prose p{color:var(--muted);margin-bottom:14px}
.prose strong{color:var(--txt)}
.ticks--prose li{margin-bottom:12px;color:var(--txt)}
.prose__note{margin-top:28px;padding:20px;background:rgba(255,120,0,.07);border:1px solid rgba(255,120,0,.25);
  border-radius:12px;color:var(--txt)!important;font-size:.95rem}

@media(max-width:900px){
  .course-layout{grid-template-columns:1fr}
  .enroll{position:static}
  .learn-grid{grid-template-columns:1fr}
}

/* ░░░░░░░░░░ pricing ░░░░░░░░░░ */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.plan{position:relative;background:var(--bg-3);border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;transition:.3s}
.plan:hover{transform:translateY(-4px);border-color:rgba(255,120,0,.35)}
.plan--feat{border-color:rgba(255,120,0,.55);background:linear-gradient(180deg,rgba(255,90,0,.1),var(--bg-3));box-shadow:0 20px 60px rgba(255,90,0,.12)}
.plan__badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--fire);color:#1a0a00;
  font-family:var(--mono);font-size:.72rem;font-weight:700;padding:5px 14px;border-radius:999px;white-space:nowrap}
.plan__name{font-size:1.15rem;margin-bottom:8px}
.plan__price{font-size:3rem;font-weight:800;line-height:1;margin-bottom:6px}
.plan__price span{font-size:1.4rem;vertical-align:super;color:var(--muted)}
.plan__price small{font-size:1rem;color:var(--muted);font-weight:400}
.plan__desc{color:var(--muted);font-size:.93rem;margin-bottom:20px;min-height:42px}
.plan__btn{width:100%;justify-content:center;margin-bottom:22px}
.plan__list{list-style:none;display:flex;flex-direction:column;gap:11px}
.plan__list li{font-size:.92rem;color:var(--txt)}
.plan__list .off{color:var(--muted);opacity:.6}

/* faq */
.faq{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq__item{background:var(--bg-3);border:1px solid var(--line);border-radius:12px;padding:0 22px}
.faq__item summary{padding:18px 0;cursor:pointer;font-weight:700;font-size:1.02rem;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::after{content:"+";color:var(--fire-2);font-size:1.4rem;transition:.2s}
.faq__item[open] summary::after{transform:rotate(45deg)}
.faq__item p{color:var(--muted);font-size:.95rem;padding:0 0 20px}
.faq__item a{color:var(--fire-2)}

@media(max-width:680px){.plans{grid-template-columns:1fr}}

/* ░░░░░░░░░░ course reader ░░░░░░░░░░ */
.reader{display:grid;grid-template-columns:310px 1fr;align-items:start;max-width:1240px;margin:0 auto}
.reader__side{position:sticky;top:68px;height:calc(100vh - 68px);overflow-y:auto;
  border-right:1px solid var(--line);background:var(--bg-2);padding:26px 22px}
.reader__course{padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:16px}
.reader__course h2{font-size:1.2rem;margin:10px 0 4px}
.reader__course p{color:var(--muted);font-size:.85rem;margin-bottom:14px}
.progress{height:7px;background:var(--bg-3);border-radius:999px;overflow:hidden}
.progress__bar{height:100%;width:0;background:var(--fire);transition:width .4s}
.progress__label{font-family:var(--mono);font-size:.75rem;color:var(--muted);margin-top:8px}
.reader__toc{display:flex;flex-direction:column;gap:2px}
.toc__item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:9px;cursor:pointer;
  color:var(--muted);font-size:.9rem;transition:.15s}
.toc__item:hover{background:var(--bg-3);color:var(--txt)}
.toc__item--on{background:rgba(255,120,0,.12);color:var(--txt);font-weight:600}
.toc__check{width:16px;height:16px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:5px;font-size:.7rem;color:#3ad860}
.toc__item--on .toc__check{border-color:var(--fire-2)}

.reader__main{padding:40px clamp(20px,5vw,64px) 60px;min-width:0}
.reader__toggle{display:none;background:var(--bg-3);border:1px solid var(--line);color:var(--txt);
  padding:10px 16px;border-radius:9px;font-weight:600;cursor:pointer;margin-bottom:20px}
.reader__content{max-width:760px}
.reader__tag{font-family:var(--mono);color:var(--fire-2);font-size:.8rem;font-weight:700}
.reader__content h1{font-size:clamp(1.7rem,3.5vw,2.3rem);margin:8px 0 22px}
.reader__content h3{font-size:1.2rem;margin:30px 0 10px;color:var(--txt)}
.reader__content p{color:var(--muted);margin-bottom:14px;font-size:1rem;line-height:1.75}
.reader__content ul{margin:0 0 16px 0;padding-left:22px}
.reader__content li{color:var(--muted);margin-bottom:9px;line-height:1.65}
.reader__content strong{color:var(--txt)}
.reader__content em{color:var(--fire-3);font-style:normal}
.reader__content a{color:var(--fire-2)}
.reader__content code{font-family:var(--mono);font-size:.86em;background:var(--bg-3);
  border:1px solid var(--line);padding:2px 6px;border-radius:5px;color:var(--fire-3)}
.reader__content pre{background:var(--bg-2);border:1px solid var(--line);border-left:3px solid var(--fire-2);
  border-radius:10px;padding:16px 18px;overflow-x:auto;margin:0 0 18px}
.reader__content pre code{background:none;border:none;padding:0;color:#cfe0d8;font-size:.85rem;line-height:1.6}
.challenge{background:linear-gradient(135deg,rgba(255,90,0,.1),rgba(255,120,0,.03));
  border:1px solid rgba(255,120,0,.3);border-radius:12px;padding:16px 20px;margin:22px 0;
  color:var(--txt);font-size:.95rem;line-height:1.6}
.challenge a{color:var(--fire-2)}
.lesson-eth{font-size:.85rem!important;color:var(--muted)!important;border-top:1px solid var(--line);padding-top:16px;margin-top:24px}
.reader__nav{display:flex;justify-content:space-between;gap:12px;max-width:760px;margin-top:36px;
  padding-top:24px;border-top:1px solid var(--line)}
.reader__nav .btn:disabled{opacity:.4;cursor:not-allowed}

@media(max-width:820px){
  .reader{grid-template-columns:1fr}
  .reader__side{position:fixed;top:68px;left:0;bottom:0;width:290px;z-index:40;transform:translateX(-100%);
    transition:transform .25s;height:calc(100vh - 68px)}
  .reader__side--open{transform:translateX(0)}
  .reader__toggle{display:inline-block}
}

/* ░░░░░░░░░░ auth / account ░░░░░░░░░░ */
.auth-wrap{min-height:calc(100vh - 68px);display:flex;align-items:center;justify-content:center;padding:60px 20px}
.auth{width:100%;max-width:420px;background:var(--bg-3);border:1px solid var(--line);border-radius:var(--radius);padding:36px 32px}
.auth--wide{max-width:520px}
.auth h1{font-size:1.7rem;margin:8px 0 20px}
.auth-form{display:flex;flex-direction:column;gap:12px;margin-bottom:16px}
.auth-form input{padding:14px 16px;border-radius:10px;background:var(--bg-2);border:1px solid var(--line);
  color:var(--txt);font-size:1rem;font-family:var(--sans)}
.auth-form input:focus{outline:none;border-color:var(--fire-2);box-shadow:0 0 0 3px rgba(255,120,0,.18)}
.auth-form .btn{width:100%;justify-content:center;margin-top:6px}
.auth-alt{color:var(--muted);font-size:.9rem}.auth-alt a{color:var(--fire-2)}
.auth-sub{color:var(--muted);margin:6px 0 20px;line-height:1.6}
.auth-err{background:rgba(255,45,31,.12);border:1px solid rgba(255,45,31,.35);color:#ff6a58;
  padding:10px 14px;border-radius:9px;font-size:.9rem;margin-bottom:16px}
.auth-ok{background:rgba(40,200,64,.12);border:1px solid rgba(40,200,64,.35);color:#3ad860;
  padding:10px 14px;border-radius:9px;font-size:.9rem;margin-bottom:16px}
.acct-row{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}
.acct-row span{color:var(--muted)}
.plan-on{color:var(--fire-3)}
.auth .btn{margin-top:18px;margin-right:8px}