:root{
    --bg:#EFF1F5;
    --card-bg:#FFFFFF;
    --border:#DADFE8;
    --text:#181C2F;
    --text-muted:#5B6270;
    --dark:#181C2F;
    --accent1:#7C4DFF;
    --accent2:#00BCD4;
    --radius:16px;
  }
  @media (prefers-color-scheme: dark){
    :root{
      --bg:#12141F;
      --card-bg:#1B1F33;
      --border:#2C3150;
      --text:#F2F3F8;
      --text-muted:#A7ACC2;
    }
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    line-height:1.5;
  }
  a{color:inherit;}
  .wrap{max-width:1100px;margin:0 auto;padding:0 20px;}
  img{max-width:100%;display:block;}

  /* ---------- Nav ---------- */
  header.nav{
    position:sticky;top:0;z-index:50;
    background:color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--border);
  }
  .nav-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1100px;margin:0 auto;}
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;text-decoration:none;}
  .brand img{width:32px;height:32px;border-radius:8px;}
  nav.links{display:flex;gap:24px;font-size:15px;font-weight:500;}
  nav.links a{text-decoration:none;color:var(--text-muted);}
  nav.links a:hover{color:var(--text);}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;border-radius:999px;font-weight:600;font-size:15px;
    text-decoration:none;min-height:48px;white-space:nowrap;
    transition:transform .15s ease, box-shadow .15s ease;
  }
  .btn:active{transform:scale(.97);}
  .btn-primary{background:linear-gradient(135deg,var(--accent1),var(--accent2));color:#fff;box-shadow:0 8px 20px -8px rgba(124,77,255,.55);}
  .btn-ghost{background:transparent;border:1px solid var(--border);color:var(--text);}
  .nav-ctas{display:none;align-items:center;gap:14px;}
  @media (min-width:820px){ .nav-ctas{display:flex;} }
  .nav-store-badge{display:block;line-height:0;}
  .nav-store-badge img{height:38px;width:auto;display:block;}
  details.mobile-menu .nav-store-badge img{height:44px;}
  details.mobile-menu{display:block;}
  details.mobile-menu summary{list-style:none;cursor:pointer;padding:8px;border-radius:10px;}
  details.mobile-menu summary::-webkit-details-marker{display:none;}
  details.mobile-menu[open] summary{background:var(--card-bg);}
  .mobile-panel{position:absolute;left:0;right:0;top:100%;background:var(--card-bg);border-bottom:1px solid var(--border);padding:16px 20px 20px;display:flex;flex-direction:column;gap:14px;}
  @media (min-width:820px){ details.mobile-menu{display:none;} nav.links{display:flex;} }
  @media (max-width:819px){ nav.links{display:none;} }

  /* ---------- Hero ---------- */
  .hero{padding:56px 0 40px;position:relative;overflow:hidden;}
  .hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center;}
  @media (min-width:900px){ .hero-grid{grid-template-columns:1.1fr .9fr;} }
  .badge{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--card-bg);border:1px solid var(--border);
    padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;color:var(--text-muted);
    margin-bottom:18px;
  }
  .badge .dot{width:8px;height:8px;border-radius:50%;background:var(--accent2);}
  h1{font-size:clamp(30px,5vw,46px);line-height:1.12;margin:0 0 18px;font-weight:800;letter-spacing:-.02em;}
  h1 .grad{background:linear-gradient(135deg,var(--accent1),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent;}
  .hero p.lead{font-size:18px;color:var(--text-muted);max-width:520px;margin:0 0 28px;}
  .cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:22px;}
  .trust-line{font-size:14px;color:var(--text-muted);}
  .store-badge-row{display:flex;align-items:center;gap:12px;margin-top:18px;flex-wrap:wrap;}
  .store-badge-row img{height:50px;width:auto;display:block;}
  .store-badge-note{font-size:12px;color:var(--text-muted);max-width:220px;}

  /* Hero screenshots (real device captures, dark + light side by side) */
  .hero-shots{display:flex;gap:20px;justify-content:center;align-items:flex-end;max-width:420px;margin:0 auto;}
  .hero-shots .shot{width:180px;max-width:46%;}
  .hero-shots .shot img{width:100%;height:auto;display:block;border-radius:24px;box-shadow:0 24px 48px -18px rgba(24,28,47,.55);}
  .hero-shots .shot span{display:block;text-align:center;margin-top:12px;font-size:13px;font-weight:600;color:var(--text-muted);}

  /* "See it in action" screenshot gallery */
  .gallery{display:grid;grid-template-columns:1fr;gap:24px;}
  @media (min-width:760px){ .gallery{grid-template-columns:repeat(3,1fr);} }
  .gallery figure{margin:0;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:16px;}
  .gallery img{width:100%;height:auto;border-radius:14px;display:block;margin-bottom:14px;}
  .gallery figcaption{font-size:14px;color:var(--text-muted);}
  .gallery figcaption strong{display:block;color:var(--text);font-size:15px;margin-bottom:4px;}

  /* ---------- Sections ---------- */
  section{padding:64px 0;}
  .section-head{max-width:640px;margin:0 0 40px;}
  .eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent1);margin-bottom:10px;}
  h2{font-size:clamp(24px,3.5vw,34px);margin:0 0 12px;font-weight:800;letter-spacing:-.01em;}
  .section-head p{color:var(--text-muted);font-size:16px;margin:0;}

  .trust-strip{padding:24px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);text-align:center;}
  .trust-strip .trust-main{margin:0 0 6px;color:var(--text-muted);font-size:14px;font-weight:600;}
  .trust-strip .trust-main strong{color:var(--text);}
  .trust-strip .trust-main .accent{color:var(--accent1);text-decoration:none;font-weight:700;}
  .trust-strip .trust-main .accent:hover{text-decoration:underline;}
  .trust-strip .trust-sub{margin:0;color:var(--text-muted);font-size:13px;font-weight:400;}

  .cards-3{display:grid;grid-template-columns:1fr;gap:20px;}
  @media (min-width:760px){ .cards-3{grid-template-columns:repeat(3,1fr);} }
  .card{
    background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
    padding:26px;
  }
  .card .icon{
    width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,var(--accent1),var(--accent2));color:#fff;font-size:20px;margin-bottom:16px;
  }
  .card h3{margin:0 0 8px;font-size:18px;}
  .card p{margin:0;color:var(--text-muted);font-size:14.5px;}

  /* Journey / audience section */
  .journey{display:grid;grid-template-columns:1fr;gap:16px;}
  @media (min-width:760px){ .journey{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));} }
  .journey .step{
    background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);
    padding:20px;position:relative;
  }
  .journey .step .num{
    width:28px;height:28px;border-radius:8px;background:var(--dark);color:#fff;
    display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;margin-bottom:12px;
  }
  .journey .step h3{margin:0 0 6px;font-size:15.5px;}
  .journey .step p{margin:0;color:var(--text-muted);font-size:13.5px;}
  .journey .step .step-link{display:inline-block;margin-top:12px;font-size:13px;font-weight:700;color:var(--accent1);text-decoration:none;}
  .journey .step .step-link:hover{text-decoration:underline;}

  /* FAQ */
  .faq-item{border-bottom:1px solid var(--border);padding:18px 0;}
  .faq-item summary{cursor:pointer;font-weight:700;font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;}
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{content:"+";font-size:22px;font-weight:400;color:var(--text-muted);flex-shrink:0;}
  .faq-item[open] summary::after{content:"–";}
  .faq-item p{margin:12px 0 0;color:var(--text-muted);font-size:15px;}

  /* CTA footer band */
  .cta-band{
    background:linear-gradient(135deg,var(--accent1),var(--accent2));
    border-radius:24px;padding:48px 32px;text-align:center;color:#fff;
  }
  .cta-band h2{color:#fff;}
  .cta-band p{color:rgba(255,255,255,.9);max-width:480px;margin:0 auto 24px;}
  .cta-band .btn-primary{background:#fff;color:var(--accent1);box-shadow:none;}

  footer{padding:40px 0 60px;border-top:1px solid var(--border);}
  .footer-inner{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:center;}
  .footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;}
  .footer-brand img{width:28px;height:28px;border-radius:7px;}
  .footer-links{display:flex;gap:20px;font-size:14px;color:var(--text-muted);flex-wrap:wrap;}
  .footer-links a{text-decoration:none;}
  .footer-links a:hover{color:var(--text);}
  .footer-note{font-size:12.5px;color:var(--text-muted);margin-top:18px;}

  /* ---------- Subject / hub landing pages ---------- */
  .breadcrumb{font-size:13px;color:var(--text-muted);margin-bottom:18px;}
  .breadcrumb a{text-decoration:none;color:var(--text-muted);}
  .breadcrumb a:hover{color:var(--text);}
  .breadcrumb span{margin:0 6px;}

  .page-hero{padding:40px 0 8px;}
  .page-hero .eyebrow{margin-bottom:10px;}
  .page-hero h1{font-size:clamp(26px,4.5vw,40px);margin:0 0 14px;}
  .page-hero p.lead{font-size:17px;color:var(--text-muted);max-width:640px;margin:0 0 24px;}
  .stat-row{display:flex;gap:28px;flex-wrap:wrap;margin-bottom:26px;}
  .stat{display:flex;flex-direction:column;}
  .stat .n{font-size:24px;font-weight:800;color:var(--text);}
  .stat .l{font-size:12.5px;color:var(--text-muted);}

  .topic-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr;gap:10px;}
  @media (min-width:640px){ .topic-list{grid-template-columns:1fr 1fr;} }
  .topic-list li{
    background:var(--card-bg);border:1px solid var(--border);border-radius:12px;
    padding:12px 14px;font-size:14.5px;display:flex;gap:10px;align-items:flex-start;
  }
  .topic-list li .num{
    flex-shrink:0;width:22px;height:22px;border-radius:6px;background:var(--dark);color:#fff;
    font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:1px;
  }

  .related-grid{display:flex;flex-wrap:wrap;gap:14px;}
  .related-grid .related-card{flex:1 1 280px;max-width:340px;}
  .related-card{
    display:block;background:var(--card-bg);border:1px solid var(--border);border-radius:14px;
    overflow:hidden;text-decoration:none;color:var(--text);transition:border-color .15s ease;
  }
  .related-card:hover{border-color:var(--accent1);}
  .related-card .card-banner{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;display:block;background:var(--border);}
  .related-card .related-card-body{padding:16px 18px;}
  .related-card .k{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent1);margin-bottom:6px;}
  .related-card .t{font-size:16px;font-weight:700;margin-bottom:4px;}
  .related-card .d{font-size:13px;color:var(--text-muted);}

  .hub-grid{display:flex;flex-wrap:wrap;gap:16px;}
  .hub-grid .related-card{flex:1 1 280px;max-width:340px;}

  .course-banner{
    width:100%;height:auto;max-height:320px;aspect-ratio:3/1;object-fit:cover;border-radius:var(--radius);
    display:block;margin:0 0 8px;background:var(--border);
  }

  .compare-table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);}
  .compare-table{width:100%;border-collapse:collapse;min-width:760px;font-size:14px;}
  .compare-table th,.compare-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top;}
  .compare-table thead th{background:var(--card-bg);color:var(--text-muted);font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;}
  .compare-table tbody tr:last-child td{border-bottom:none;}
  .compare-table tbody tr.is-solopath{background:linear-gradient(135deg,rgba(124,77,255,.08),rgba(0,188,212,.08));}
  .compare-table td.app-cell{font-weight:700;white-space:nowrap;}
  .compare-table .pick-badge{display:inline-block;margin-left:8px;padding:2px 8px;border-radius:999px;background:linear-gradient(135deg,var(--accent1),var(--accent2));color:#fff;font-size:10px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;vertical-align:middle;}
  .compare-note{font-size:13px;color:var(--text-muted);margin-top:14px;}
  .coverage-list{margin:0;padding-left:18px;min-width:260px;}
  .coverage-list li{margin:5px 0;}

  .stat-row-center{justify-content:center;margin:18px 0 0;}
  .stat-row-center .stat{align-items:center;text-align:center;}