/* ==========================================================================
   NVIDIUM — Design System
   Seed: S03 — Tech Glow (dark, controlled glow, sharp illuminated panels)
   ========================================================================== */

:root{
  --bg:#030806;
  --bg-alt:#07100A;
  --surface:#0A1510;
  --surface-2:#0E1C14;
  --border:#1A3424;
  --border-strong:#2A5938;
  --text:#F4FFF5;
  --text-muted:#B8CABD;
  --text-faint:#819687;
  --primary:#69D817;
  --primary-strong:#8BFF2A;
  --primary-dim:#347B08;
  --accent:#54EE1A;
  --accent-dim:#2EAF0C;
  --danger:#FF6B5E;
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --container:1220px;
  --shadow-glow:0 0 0 1px rgba(105,216,23,.12), 0 20px 60px -20px rgba(105,216,23,.25);
  --shadow-card:0 10px 30px -18px rgba(0,0,0,.6);
  --ff-display:'Poppins',sans-serif;
  --ff-body:'Poppins',sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--ff-body);
  background:
    radial-gradient(1100px 600px at 85% -10%, rgba(105,216,23,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(84,238,26,.06), transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-alt{background:linear-gradient(180deg,transparent,rgba(105,216,23,.03) 40%,transparent);}
.section-head{max-width:640px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--primary-strong);margin-bottom:14px;
}
.eyebrow::before{content:'';width:18px;height:2px;background:var(--primary-strong);display:inline-block;border-radius:2px}
h1,h2,h3,h4{font-family:var(--ff-display);font-weight:600;letter-spacing:-.02em;color:var(--text)}
h1{font-size:clamp(2.4rem,4.2vw,3.6rem);line-height:1.08;font-weight:700}
h2{font-size:clamp(1.9rem,3vw,2.6rem);line-height:1.15;font-weight:650}
h3{font-size:1.25rem;line-height:1.35}
p{color:var(--text-muted)}
.lead{font-size:1.1rem;color:var(--text-muted)}

/* ---- Buttons ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 28px;border-radius:var(--radius-sm);
  font-weight:600;font-size:15px;border:1px solid transparent;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--primary-strong);outline-offset:3px}
.btn-primary{
  background:linear-gradient(180deg,var(--primary-strong),var(--primary));
  color:#061000;box-shadow:0 0 0 1px rgba(105,216,23,.4), 0 16px 34px -14px rgba(105,216,23,.65);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(139,255,42,.6), 0 20px 40px -12px rgba(105,216,23,.8)}
.btn-outline{
  background:rgba(255,255,255,.02);border-color:var(--border-strong);color:var(--text);
}
.btn-outline:hover{border-color:var(--primary);color:var(--primary-strong);transform:translateY(-2px)}
.btn-block{width:100%}
.btn-lg{padding:18px 34px;font-size:16px}
.btn svg{width:18px;height:18px;flex-shrink:0}

/* ---- Header ---- */
#site-header{position:sticky;top:0;z-index:100}
.header{
  background:rgba(3,8,6,.72);backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--border);transition:box-shadow .25s ease, background .25s ease;
}
.header.scrolled{box-shadow:0 12px 30px -18px rgba(0,0,0,.7);background:rgba(3,8,6,.92)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--ff-display);font-weight:700;font-size:19px;letter-spacing:-.01em}
.brand img{width:34px;height:34px}
.brand .brand-name{display:inline-block;color:var(--primary-strong);letter-spacing:-.035em;word-spacing:0;white-space:nowrap;font-kerning:normal}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:14.5px;font-weight:500;color:var(--text-muted);position:relative;transition:color .2s}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--primary-strong);transition:width .2s}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.header-actions{display:flex;align-items:center;gap:18px}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:6px}
.menu-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.25s}
.mobile-panel{display:none}

@media(max-width:960px){
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .header-actions .btn-primary{display:none}
  .mobile-panel{
    display:block;position:fixed;inset:76px 0 0 0;background:var(--bg-alt);
    transform:translateY(-110%);transition:transform .3s ease;z-index:90;
    border-top:1px solid var(--border);overflow-y:auto;
  }
  .mobile-panel.open{transform:translateY(0)}
  .mobile-panel .container{padding-top:28px;display:flex;flex-direction:column;gap:6px}
  .mobile-panel a{padding:14px 4px;font-size:16px;font-weight:600;border-bottom:1px solid var(--border);color:var(--text)}
  .mobile-panel .btn{margin-top:18px}
}

/* ---- Hero (split) ---- */
.hero{padding:76px 0 100px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:100px;
  background:rgba(105,216,23,.08);border:1px solid rgba(105,216,23,.3);
  font-size:12.5px;font-weight:600;color:var(--primary-strong);margin-bottom:22px;
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--primary-strong);box-shadow:0 0 10px var(--primary-strong)}
.hero h1{margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--primary-strong)}
.hero p.lead{max-width:520px;margin-bottom:34px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-stats{display:flex;gap:32px;flex-wrap:wrap}
.hero-stats div strong{display:block;font-family:var(--ff-display);font-size:1.5rem;color:var(--text);font-weight:700}
.hero-stats div span{font-size:12.5px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.08em}
.hero-visual{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border-strong);box-shadow:var(--shadow-glow);aspect-ratio:16/9}
.hero-visual img{width:100%;height:100%;object-fit:cover}

@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
}

/* ---- About (offset panel) ---- */
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center}
.about-visual{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);aspect-ratio:16/9;box-shadow:var(--shadow-card)}
.about-visual img{width:100%;height:100%;object-fit:cover}
.about-copy p{margin-bottom:16px}
.about-list{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.about-list li{display:flex;gap:12px;align-items:flex-start;color:var(--text-muted);font-size:15px}
.about-list svg{width:20px;height:20px;flex-shrink:0;color:var(--primary-strong);margin-top:2px}
@media(max-width:900px){.about-grid{grid-template-columns:1fr}}

/* ---- Features (asymmetric cards) ---- */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:30px 26px;transition:border-color .2s, transform .2s;
}
.feature-card:hover{border-color:var(--primary-dim);transform:translateY(-4px)}
.feature-card .icon{
  width:46px;height:46px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:rgba(105,216,23,.1);color:var(--primary-strong);margin-bottom:18px;
}
.feature-card .icon svg{width:24px;height:24px}
.feature-card h3{margin-bottom:8px}
.feature-card p{font-size:14.5px}
.feature-card.wide{grid-column:span 2}
@media(max-width:900px){.features-grid{grid-template-columns:1fr}.feature-card.wide{grid-column:span 1}}
@media(min-width:901px) and (max-width:1100px){.features-grid{grid-template-columns:repeat(2,1fr)}}

/* ---- How It Works (connected steps) ---- */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.steps::before{content:'';position:absolute;top:26px;left:6%;right:6%;height:2px;background:linear-gradient(90deg,var(--primary-dim),var(--border) 90%)}
.step{position:relative;padding:0 18px;text-align:left}
.step-num{
  width:52px;height:52px;border-radius:50%;background:var(--bg);border:2px solid var(--primary);
  display:flex;align-items:center;justify-content:center;font-family:var(--ff-display);font-weight:700;
  color:var(--primary-strong);margin-bottom:22px;position:relative;z-index:2;box-shadow:0 0 20px rgba(105,216,23,.3);
}
.step h3{margin-bottom:8px;font-size:1.05rem}
.step p{font-size:14px}
@media(max-width:900px){
  .steps{grid-template-columns:1fr;gap:34px}
  .steps::before{display:none}
}

/* ---- Compatibility (table panel) ---- */
.compat-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
.compat-table{width:100%;border-collapse:collapse}
.compat-table th,.compat-table td{padding:16px 22px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--border)}
.compat-table th{color:var(--text-faint);text-transform:uppercase;font-size:12px;letter-spacing:.08em;font-weight:600;background:var(--surface-2)}
.compat-table td{color:var(--text-muted)}
.compat-table tr:last-child td{border-bottom:none}
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:100px;font-size:12.5px;font-weight:600}
.tag.ok{background:rgba(105,216,23,.12);color:var(--primary-strong)}
.tag.warn{background:rgba(255,180,50,.12);color:#FFB432}
.tag.no{background:rgba(255,107,94,.12);color:var(--danger)}
.compat-table{display:table}
@media(max-width:700px){
  .compat-table thead{display:none}
  .compat-table,.compat-table tbody,.compat-table tr,.compat-table td{display:block;width:100%}
  .compat-table tr{border-bottom:1px solid var(--border);padding:14px 22px}
  .compat-table td{border:none;padding:4px 0;display:flex;justify-content:space-between;gap:10px}
  .compat-table td::before{content:attr(data-label);color:var(--text-faint);font-size:12px;text-transform:uppercase}
}

/* ---- Use Cases (alternating) ---- */
.usecase-row{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;padding:44px 0;border-bottom:1px solid var(--border)}
.usecase-row:last-child{border-bottom:none}
.usecase-row:nth-child(even) .uc-visual{order:2}
.uc-visual{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border);aspect-ratio:16/9}
.uc-visual img{width:100%;height:100%;object-fit:cover}
.uc-copy .num{font-family:var(--ff-display);font-size:13px;color:var(--primary-strong);font-weight:700;letter-spacing:.1em}
.uc-copy h3{font-size:1.4rem;margin:10px 0 12px}
@media(max-width:820px){.usecase-row{grid-template-columns:1fr}.usecase-row:nth-child(even) .uc-visual{order:0}}

/* ---- Installation (numbered stack) ---- */
.install-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:8px}
.install-item{display:flex;gap:22px;padding:26px 24px;border-bottom:1px solid var(--border)}
.install-item:last-child{border-bottom:none}
.install-num{
  flex-shrink:0;width:38px;height:38px;border-radius:8px;background:rgba(105,216,23,.1);
  color:var(--primary-strong);display:flex;align-items:center;justify-content:center;font-weight:700;font-family:var(--ff-display);
}
.install-item h3{margin-bottom:6px;font-size:1.05rem}
.install-item p{font-size:14.5px}
.install-item code{background:var(--bg);border:1px solid var(--border-strong);padding:2px 8px;border-radius:4px;font-size:13px;color:var(--accent)}

/* ---- Download section ---- */
.download-panel{
  background:linear-gradient(160deg,rgba(105,216,23,.08),rgba(84,238,26,.04)),var(--surface);
  border:1px solid var(--border-strong);border-radius:var(--radius-lg);
  padding:56px;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;
  box-shadow:var(--shadow-glow);position:relative;overflow:hidden;
}
.download-panel::before{content:'';position:absolute;top:-40%;right:-10%;width:400px;height:400px;background:radial-gradient(circle,rgba(84,238,26,.15),transparent 70%);pointer-events:none}
.download-meta{display:flex;gap:22px;flex-wrap:wrap;margin:22px 0 30px}
.download-meta div{font-size:13px;color:var(--text-faint)}
.download-meta div strong{display:block;color:var(--text);font-size:15px;font-weight:600}
.download-side{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);padding:26px}
.download-side ul{display:flex;flex-direction:column;gap:12px;margin-bottom:22px}
.download-side li{display:flex;gap:10px;font-size:13.5px;color:var(--text-muted);align-items:flex-start}
.download-side svg{width:16px;height:16px;color:var(--primary-strong);flex-shrink:0;margin-top:3px}
@media(max-width:900px){.download-panel{grid-template-columns:1fr;padding:32px}}

/* ---- Safety Notice ---- */
.safety-box{
  display:flex;gap:22px;background:var(--surface);border:1px solid var(--border-strong);
  border-left:4px solid var(--accent);border-radius:var(--radius-md);padding:30px 32px;
}
.safety-box .icon{width:44px;height:44px;flex-shrink:0;color:var(--accent)}
.safety-box h3{margin-bottom:8px}
.safety-box p{font-size:14.5px}

/* ---- Pros and Cons ---- */
.proscons{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.pc-card{border-radius:var(--radius-md);padding:30px 28px;border:1px solid var(--border)}
.pc-card.pros{background:linear-gradient(180deg,rgba(105,216,23,.06),transparent)}
.pc-card.cons{background:linear-gradient(180deg,rgba(255,107,94,.05),transparent)}
.pc-card h3{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.pc-card ul{display:flex;flex-direction:column;gap:12px}
.pc-card li{display:flex;gap:10px;font-size:14.5px;color:var(--text-muted)}
.pc-card.pros li svg{color:var(--primary-strong)}
.pc-card.cons li svg{color:var(--danger)}
.pc-card svg{width:18px;height:18px;flex-shrink:0;margin-top:2px}
@media(max-width:700px){.proscons{grid-template-columns:1fr}}

/* ---- Release Info ---- */
.release-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px}
.release-row{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid var(--border);flex-wrap:wrap;gap:8px}
.release-row:last-child{border-bottom:none}
.release-row .label{color:var(--text-faint);font-size:13.5px;text-transform:uppercase;letter-spacing:.06em}
.release-row .value{font-weight:600;font-size:14.5px}

/* ---- Troubleshooting (accordion-lite) ---- */
.trouble-list{display:flex;flex-direction:column;gap:14px}
.trouble-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:22px 26px}
.trouble-item h3{font-size:1rem;margin-bottom:8px;display:flex;gap:10px;align-items:center}
.trouble-item h3 svg{width:18px;height:18px;color:var(--danger);flex-shrink:0}
.trouble-item p{font-size:14px}

/* ---- Guides Preview (blog cards) ---- */
.guides-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.guide-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:transform .2s,border-color .2s}
.guide-card:hover{transform:translateY(-4px);border-color:var(--primary-dim)}
.guide-thumb{aspect-ratio:16/9;overflow:hidden}
.guide-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.guide-card:hover .guide-thumb img{transform:scale(1.06)}
.guide-body{padding:22px}
.guide-cat{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--primary-strong);margin-bottom:8px;display:block}
.guide-body h3{font-size:1.02rem;margin-bottom:10px;line-height:1.4}
.guide-body p{font-size:13.5px;margin-bottom:14px}
.guide-meta{font-size:12px;color:var(--text-faint);display:flex;justify-content:space-between;align-items:center}
@media(max-width:900px){.guides-grid{grid-template-columns:1fr}}
@media(min-width:901px) and (max-width:1150px){.guides-grid{grid-template-columns:repeat(2,1fr)}}

/* ---- FAQ ---- */
.faq-tabs{display:flex;gap:12px;margin-bottom:30px}
.faq-tab{padding:11px 22px;border-radius:100px;border:1px solid var(--border-strong);background:var(--surface);font-size:14px;font-weight:600;color:var(--text-muted);transition:.2s}
.faq-tab.active{background:var(--primary);color:#061000;border-color:var(--primary)}
.faq-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.faq-group{display:none;flex-direction:column;gap:12px}
.faq-group.active{display:flex}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:19px 22px;background:none;border:none;text-align:left;font-weight:600;font-size:14.5px;color:var(--text)}
.faq-q svg{width:18px;height:18px;flex-shrink:0;transition:transform .25s;color:var(--primary-strong)}
.faq-item.open .faq-q svg{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 22px 20px;font-size:14px;color:var(--text-muted)}
@media(max-width:820px){.faq-cols{grid-template-columns:1fr}}

/* ---- Footer ---- */
.footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand p{margin-top:14px;font-size:14px;max-width:320px}
.footer-col h4{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14.5px;color:var(--text-muted);transition:color .2s}
.footer-col a:hover{color:var(--primary-strong)}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--text-faint)}
@media(max-width:800px){.footer-grid{grid-template-columns:1fr;gap:32px}}

/* ---- Scroll to top ---- */
.scrolltop{
  position:fixed;bottom:26px;right:26px;width:46px;height:46px;border-radius:50%;
  background:var(--primary);color:#061000;border:none;display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 30px -8px rgba(105,216,23,.6);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:.25s;z-index:80;
}
.scrolltop.show{opacity:1;visibility:visible;transform:translateY(0)}
.scrolltop svg{width:20px;height:20px}

/* ---- Generic inner-page hero (about/contact/legal) ---- */
.page-hero{padding:64px 0 56px;border-bottom:1px solid var(--border)}
.page-hero .eyebrow{margin-bottom:14px}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--text-faint);margin-bottom:18px}
.breadcrumb a{color:var(--text-faint)}
.breadcrumb a:hover{color:var(--primary-strong)}

/* ---- Legal / prose pages ---- */
.prose{max-width:820px}
.prose h2{margin:36px 0 14px;font-size:1.5rem}
.prose h2:first-child{margin-top:0}
.prose p{margin-bottom:14px}
.prose ul{margin:14px 0 14px 20px;list-style:disc}
.prose li{color:var(--text-muted);margin-bottom:8px}
.prose-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:44px}

/* ---- Contact ---- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px}
.contact-card .icon{width:44px;height:44px;border-radius:10px;background:rgba(105,216,23,.1);color:var(--primary-strong);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.contact-card .icon svg{width:22px;height:22px}
.contact-email{font-family:var(--ff-display);font-size:1.15rem;font-weight:600;color:var(--primary-strong);margin:14px 0}
@media(max-width:800px){.contact-grid{grid-template-columns:1fr}}

/* ---- Blog listing ---- */
.blog-hero-visual{aspect-ratio:16/9;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);margin-top:36px}
.blog-hero-visual img{width:100%;height:100%;object-fit:cover}
.blog-listing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:20px}
@media(max-width:900px){.blog-listing-grid{grid-template-columns:1fr}}
@media(min-width:901px) and (max-width:1150px){.blog-listing-grid{grid-template-columns:repeat(2,1fr)}}

/* ---- Blog post page ---- */
.post-layout{display:grid;grid-template-columns:1fr 300px;gap:50px;align-items:start}
.post-cover{aspect-ratio:16/9;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);margin-bottom:32px}
.post-cover img{width:100%;height:100%;object-fit:cover}
.post-meta{display:flex;gap:16px;align-items:center;font-size:13px;color:var(--text-faint);margin-bottom:16px;flex-wrap:wrap}
.post-meta span{display:flex;align-items:center;gap:6px}
.post-body h2{margin:34px 0 14px;font-size:1.5rem}
.post-body h3{margin:24px 0 10px}
.post-body p{margin-bottom:15px}
.post-body ul{margin:14px 0 14px 20px;list-style:disc}
.post-body li{color:var(--text-muted);margin-bottom:8px}
.sidebar-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;margin-bottom:22px}
.sidebar-box h4{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint);margin-bottom:16px}
.sidebar-box ul{display:flex;flex-direction:column;gap:12px}
.sidebar-box li a{font-size:14px;color:var(--text-muted);display:block;line-height:1.4}
.sidebar-box li a:hover{color:var(--primary-strong)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:20px}
@media(max-width:900px){.related-grid{grid-template-columns:1fr}.post-layout{grid-template-columns:1fr}}
@media(min-width:901px) and (max-width:1150px){.related-grid{grid-template-columns:repeat(2,1fr)}}

/* ---- Reveal animation ---- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---- Accessibility and reliability fixes ---- */
:root{
  --ff-display:'Poppins',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
  --ff-body:'Poppins',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
}
.skip-link{
  position:fixed;top:10px;left:10px;z-index:9999;padding:10px 14px;border-radius:6px;
  background:var(--primary-strong);color:#061000;font-weight:700;transform:translateY(-160%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0)}
a:focus-visible,button:focus-visible{outline:2px solid var(--primary-strong);outline-offset:3px}
.mobile-panel{visibility:hidden;pointer-events:none}
.mobile-panel.open{visibility:visible;pointer-events:auto}
.download-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.footer-disclaimer{margin-top:16px;padding-top:16px;border-top:1px solid var(--border);font-size:12.5px;color:var(--text-faint);text-align:center}
.footer-bottom a{color:var(--text-faint)}
.footer-bottom a:hover,.footer-bottom a:focus-visible{color:var(--primary-strong)}
.prose a,.post-body a{color:var(--primary-strong);text-decoration:underline;text-underline-offset:3px}
.prose a:hover,.post-body a:hover{color:var(--text)}
.faq-q[aria-expanded="true"] svg{transform:rotate(45deg)}
.faq-group[hidden]{display:none!important}
@media(max-width:640px){
  .download-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

/* Content remains visible even when JavaScript or observers are unavailable. */
.reveal,.reveal.visible{opacity:1!important;transform:none!important}

.download-note{margin-top:12px;max-width:620px;font-size:13px;line-height:1.7;color:var(--text-muted)}