:root{
  --sys-bg:#f2f2f7; --sys-bg-elevated:rgba(255,255,255,0.72); --sys-bg-secondary:rgba(255,255,255,0.55);
  --label:#1c1c1e; --label-secondary:rgba(60,60,67,0.6); --label-tertiary:rgba(60,60,67,0.38);
  --separator:rgba(60,60,67,0.13); --blue:#0a84ff; --green:#30d158; --orange:#ff9f0a;
  --fill:rgba(120,120,128,0.12); --card-shadow:0 1px 2px rgba(0,0,0,0.04),0 8px 24px rgba(0,0,0,0.06);
  --radius-lg:22px; --radius-md:16px; --radius-sm:10px;
  --mol-a:#0a84ff; --mol-b:#5e5ce6;
}
@media (prefers-color-scheme: dark){
  :root{
    --sys-bg:#000000; --sys-bg-elevated:rgba(28,28,30,0.72); --sys-bg-secondary:rgba(28,28,30,0.55);
    --label:#f2f2f7; --label-secondary:rgba(235,235,245,0.6); --label-tertiary:rgba(235,235,245,0.38);
    --separator:rgba(84,84,88,0.6); --fill:rgba(120,120,128,0.24);
    --card-shadow:0 1px 2px rgba(0,0,0,0.3),0 8px 24px rgba(0,0,0,0.4);
    --mol-a:#64d2ff; --mol-b:#bf5af2;
  }
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue",Arial,sans-serif;
  background:radial-gradient(ellipse 800px 500px at 50% -10%, rgba(10,132,255,0.10), transparent 60%), var(--sys-bg);
  color:var(--label); min-height:100vh; padding-bottom:env(safe-area-inset-bottom,40px); -webkit-font-smoothing:antialiased;
}
.wrap{max-width:980px;margin:0 auto;padding:0 20px;}
.navbar{position:sticky;top:0;z-index:50;backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);
  background:var(--sys-bg-elevated);border-bottom:0.5px solid var(--separator);padding:12px 20px;
  display:flex;align-items:center;justify-content:space-between;}
.navbar-title{font-size:16px;font-weight:600;letter-spacing:-0.01em;display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--label);}
.navbar-icon{width:28px;height:28px;border-radius:8px;flex-shrink:0;display:block;overflow:hidden;}
.navbar-icon img{width:100%;height:100%;display:block;}
.navbar-links{display:flex;align-items:center;gap:18px;}
.navbar-links a{font-size:14px;font-weight:600;color:var(--label-secondary);text-decoration:none;}
.navbar-call{color:var(--blue) !important;}
.navbar-cta{font-size:14.5px;font-weight:600;color:#fff !important;background:var(--blue);padding:8px 16px;border-radius:980px;}
.crumb{font-size:13px;color:var(--label-tertiary);font-weight:500;padding:16px 0 0;}
.crumb a{color:var(--label-tertiary);text-decoration:none;}
.crumb a:hover{color:var(--blue);}

.btn{display:inline-flex;align-items:center;gap:6px;padding:13px 22px;border-radius:980px;font-size:15px;font-weight:600;
  text-decoration:none;border:none;cursor:pointer;transition:transform .12s ease,background .12s ease;}
.btn:active{transform:scale(0.97);}
.btn-fill{background:var(--blue);color:#fff;}
.btn-fill:hover{background:#3399ff;}
.btn-tint{background:var(--fill);color:var(--blue);}
.btn-tint:hover{background:rgba(10,132,255,0.16);}

.section-title{font-size:22px;font-weight:700;letter-spacing:-0.01em;}
.section-caption{font-size:13px;color:var(--label-tertiary);font-weight:500;}
.section-header{display:flex;align-items:baseline;justify-content:space-between;padding:36px 0 14px;}

.widget{position:relative;background:var(--sys-bg-elevated);backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);border-radius:var(--radius-lg);border:0.5px solid var(--separator);
  box-shadow:var(--card-shadow);padding:20px;transition:transform .18s ease,box-shadow .18s ease;}
.widget:hover{transform:translateY(-2px);box-shadow:0 4px 8px rgba(0,0,0,0.06),0 16px 32px rgba(0,0,0,0.10);}

.widget-row{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:0.5px solid var(--separator);font-size:14.5px;}
.widget-row:last-child{border-bottom:none;}
.widget-row .k{color:var(--label);font-weight:500;}
.widget-row .v{color:var(--label-secondary);font-variant-numeric:tabular-nums;font-weight:500;}

.chip-row{display:flex;flex-wrap:wrap;gap:6px;}
.chip{font-size:12px;font-weight:600;padding:5px 10px;border-radius:980px;background:var(--fill);color:var(--label-secondary);}

.order-link{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:12px 14px;border-radius:980px;
  background:var(--fill);color:var(--blue);font-size:14.5px;font-weight:600;text-decoration:none;transition:background .15s ease;}
.order-link:hover{background:rgba(10,132,255,0.16);}
.order-link:active{transform:scale(0.98);}

footer{max-width:980px;margin:56px auto 0;padding:24px 20px 40px;border-top:0.5px solid var(--separator);
  display:flex;flex-wrap:wrap;gap:8px 22px;font-size:13px;color:var(--label-tertiary);font-weight:500;}
footer a{color:var(--blue);text-decoration:none;}
footer .foot-name{color:var(--label-secondary);font-weight:600;}

/* ---- product hero (molecule first, details below — centered, professional) ---- */
.p-hero{display:flex;flex-direction:column;align-items:center;gap:28px;padding:44px 0 12px;text-align:center;}
.p-hero-text{max-width:600px;}
.eyebrow{font-size:12.5px;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px;
  display:flex;align-items:center;justify-content:center;gap:8px;}
.eyebrow .cas{color:var(--label-tertiary);font-weight:500;text-transform:none;letter-spacing:0;}
h1.p-title{font-size:clamp(32px,5.2vw,46px);font-weight:700;letter-spacing:-0.02em;line-height:1.04;}
.p-formula{font-size:19px;font-weight:600;color:var(--label-secondary);margin-top:8px;font-variant-numeric:normal;}
.p-lede{margin:14px auto 0;font-size:16.5px;line-height:1.5;color:var(--label-secondary);max-width:520px;}
.p-hero-actions{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center;}

.mol-card{flex:0 0 auto;width:340px;max-width:100%;margin:0 auto;background:var(--sys-bg-elevated);backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);border:0.5px solid var(--separator);border-radius:var(--radius-lg);
  box-shadow:var(--card-shadow);padding:22px;display:flex;flex-direction:column;align-items:center;gap:10px;}
.mol-caption{font-size:12px;color:var(--label-tertiary);font-weight:600;letter-spacing:.02em;text-align:center;}

/* 3D molecule viewer */
.mol-3d{width:100%;height:230px;border-radius:var(--radius-md);overflow:hidden;cursor:grab;touch-action:none;}
.mol-3d:active{cursor:grabbing;}
.mol-3d canvas{display:block;width:100%!important;height:100%!important;}
.mol-legend{display:flex;gap:12px;justify-content:center;margin-top:2px;}
.mol-legend span{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--label-tertiary);font-weight:600;}
.mol-legend i{width:8px;height:8px;border-radius:50%;display:inline-block;}
.mol-hint{font-size:10.5px;color:var(--label-tertiary);text-align:center;letter-spacing:.02em;max-width:300px;}

/* quick facts strip */
.facts-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-top:28px;}
.fact{background:var(--sys-bg-secondary);border:0.5px solid var(--separator);border-radius:var(--radius-md);padding:14px 16px;}
.fact-label{font-size:11px;font-weight:700;color:var(--label-tertiary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px;}
.fact-value{font-size:16px;font-weight:700;letter-spacing:-0.01em;}

/* about / SEO copy */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;margin-top:8px;}
.about-copy p{font-size:15.5px;line-height:1.65;color:var(--label-secondary);margin-bottom:14px;}
.about-copy h3{font-size:16px;font-weight:700;margin:22px 0 8px;color:var(--label);}
.about-copy ul{padding-left:20px;margin-bottom:14px;}
.about-copy li{font-size:15px;line-height:1.6;color:var(--label-secondary);margin-bottom:6px;}
.side-widget{position:sticky;top:80px;height:fit-content;}
.side-widget .widget-title{font-size:14px;font-weight:700;margin-bottom:12px;}

/* specs grid */
.spec-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin-top:8px;}

/* FAQ */
.faq-item{border-bottom:0.5px solid var(--separator);padding:16px 0;}
.faq-item:last-child{border-bottom:none;}
.faq-q{font-size:15.5px;font-weight:600;margin-bottom:6px;}
.faq-a{font-size:14.5px;line-height:1.6;color:var(--label-secondary);}

/* register widget reused */
.register-widget{position:relative;background:linear-gradient(155deg, rgba(10,132,255,0.14), rgba(10,132,255,0.02));
  backdrop-filter:blur(24px) saturate(180%);-webkit-backdrop-filter:blur(24px) saturate(180%);border:0.5px solid var(--separator);
  border-radius:28px;box-shadow:var(--card-shadow);padding:32px;display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:center;}
.register-left{flex:1;min-width:240px;}
.register-badge{width:40px;height:40px;border-radius:11px;overflow:hidden;margin-bottom:14px;flex-shrink:0;}
.register-badge img{width:100%;height:100%;display:block;}
h2.register-title{font-size:23px;font-weight:700;letter-spacing:-0.01em;line-height:1.15;margin-bottom:8px;}
.register-copy{font-size:14px;color:var(--label-secondary);line-height:1.55;}

.lead-form, .register-form{display:flex;flex-direction:column;gap:10px;}
.lead-form input, .lead-form select, .lead-form textarea,
.register-form input, .register-form select, .register-form textarea{
  -webkit-appearance:none;appearance:none;background:var(--fill);border:0.5px solid var(--separator);
  border-radius:var(--radius-sm);padding:12px 14px;color:var(--label);font-family:inherit;font-size:14.5px;resize:vertical;
}
.lead-form input::placeholder, .lead-form textarea::placeholder,
.register-form input::placeholder{color:var(--label-tertiary);}
.lead-form input:focus, .lead-form textarea:focus, .lead-form select:focus,
.register-form input:focus, .register-form select:focus{outline:2px solid var(--blue);outline-offset:1px;}
.register-submit{margin-top:2px;padding:13px 16px;background:var(--blue);border:none;border-radius:980px;color:#fff;
  font-weight:700;font-size:14.5px;cursor:pointer;transition:background .12s ease,transform .12s ease;}
.register-submit:hover{background:#3399ff;}
.register-submit:active{transform:scale(0.98);}
.register-submit:disabled{opacity:0.6;cursor:default;}
.form-note{font-size:11.5px;color:var(--label-tertiary);text-align:center;line-height:1.5;}
.form-note a{color:var(--blue);text-decoration:none;}

@media (max-width:760px){
  .about-grid{grid-template-columns:1fr;}
  .side-widget{position:static;}
  .mol-card{width:100%;}
}

/* ---- page-specific (hub) rules ---- */

  :root{
    --sys-bg: #f2f2f7;
    --sys-bg-elevated: rgba(255,255,255,0.72);
    --sys-bg-secondary: rgba(255,255,255,0.55);
    --label: #1c1c1e;
    --label-secondary: rgba(60,60,67,0.6);
    --label-tertiary: rgba(60,60,67,0.38);
    --separator: rgba(60,60,67,0.13);
    --blue: #0a84ff;
    --green: #30d158;
    --orange: #ff9f0a;
    --fill: rgba(120,120,128,0.12);
    --card-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
    --radius-lg: 22px;
    --radius-md: 16px;
    --radius-sm: 10px;
  }
  @media (prefers-color-scheme: dark){
    :root{
      --sys-bg: #000000;
      --sys-bg-elevated: rgba(28,28,30,0.72);
      --sys-bg-secondary: rgba(28,28,30,0.55);
      --label: #f2f2f7;
      --label-secondary: rgba(235,235,245,0.6);
      --label-tertiary: rgba(235,235,245,0.38);
      --separator: rgba(84,84,88,0.6);
      --blue: #0a84ff;
      --green: #30d158;
      --orange: #ff9f0a;
      --fill: rgba(120,120,128,0.24);
      --card-shadow: 0 1px 2px rgba(0,0,0,0.3), 0 8px 24px rgba(0,0,0,0.4);
    }
  }
  *{ box-sizing:border-box; margin:0; padding:0; -webkit-tap-highlight-color:transparent; }
  html{ -webkit-text-size-adjust:100%; }
  body{
    font-family:-apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    background:
      radial-gradient(ellipse 800px 500px at 50% -10%, rgba(10,132,255,0.10), transparent 60%),
      var(--sys-bg);
    color:var(--label);
    min-height:100vh;
    padding-bottom:env(safe-area-inset-bottom, 40px);
    -webkit-font-smoothing:antialiased;
  }
  .wrap{ max-width:980px; margin:0 auto; padding:0 20px; }

  /* Nav bar */
  .navbar{
    position:sticky; top:0; z-index:50;
    backdrop-filter:saturate(180%) blur(20px);
    -webkit-backdrop-filter:saturate(180%) blur(20px);
    background:var(--sys-bg-elevated);
    border-bottom:0.5px solid var(--separator);
    padding:12px 20px;
    display:flex; align-items:center; justify-content:space-between;
  }
  .navbar-title{
    font-size:17px; font-weight:600; letter-spacing:-0.01em;
    display:flex; align-items:center; gap:8px;
  }
  .navbar-icon{
    width:28px;height:28px;border-radius:8px;
    flex-shrink:0; display:block; overflow:hidden;
  }
  .navbar-icon img{ width:100%; height:100%; display:block; }
  .navbar-cta{
    font-size:15px; font-weight:600; color:var(--blue);
    text-decoration:none; padding:6px 10px;
  }
  .navbar-links{ display:flex; align-items:center; gap:16px; }
  @media (max-width:600px){ .hide-mobile{ display:none; } }

  /* Hero */
  .hero{ padding:44px 0 30px; }
  .hero-eyebrow{
    font-size:13px; font-weight:600; color:var(--blue);
    text-transform:uppercase; letter-spacing:.04em;
    margin-bottom:10px;
  }
  h1.hero-title{
    font-size:clamp(34px,6vw,52px);
    font-weight:700;
    letter-spacing:-0.02em;
    line-height:1.04;
    color:var(--label);
    max-width:640px;
  }
  .hero-sub{
    margin-top:14px;
    font-size:17px;
    line-height:1.45;
    color:var(--label-secondary);
    max-width:520px;
    font-weight:400;
  }
  .hero-actions{
    margin-top:26px;
    display:flex; gap:12px; flex-wrap:wrap;
  }
  .btn{
    display:inline-flex; align-items:center; gap:6px;
    padding:13px 22px;
    border-radius:980px;
    font-size:15px; font-weight:600;
    text-decoration:none;
    border:none;
    cursor:pointer;
    transition:transform .12s ease, opacity .12s ease, background .12s ease;
  }
  .btn:active{ transform:scale(0.97); }
  .btn-fill{ background:var(--blue); color:white; }
  .btn-fill:hover{ background:#3399ff; }
  .btn-tint{ background:var(--fill); color:var(--blue); }
  .btn-tint:hover{ background:rgba(10,132,255,0.16); }

  /* Section headers */
  .section-header{
    display:flex; align-items:baseline; justify-content:space-between;
    padding:36px 0 14px;
  }
  .section-title{ font-size:22px; font-weight:700; letter-spacing:-0.01em; }
  .section-caption{ font-size:13px; color:var(--label-tertiary); font-weight:500; }

  /* Widget grid — mirrors iOS widget size classes */
  .widget-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));
    gap:14px;
  }

  .widget{
    position:relative;
    background:var(--sys-bg-elevated);
    backdrop-filter:blur(20px) saturate(160%);
    -webkit-backdrop-filter:blur(20px) saturate(160%);
    border-radius:var(--radius-lg);
    border:0.5px solid var(--separator);
    box-shadow:var(--card-shadow);
    padding:20px;
    display:flex;
    flex-direction:column;
    min-height:270px;
    transition:transform .18s ease, box-shadow .18s ease;
  }
  .widget:hover{
    transform:translateY(-2px);
    box-shadow:0 4px 8px rgba(0,0,0,0.06), 0 16px 32px rgba(0,0,0,0.10);
  }
  .widget-top{ display:flex; align-items:center; gap:10px; margin-bottom:14px; }
  .widget-icon{
    width:36px; height:36px; border-radius:10px;
    flex-shrink:0; overflow:hidden; display:block;
    background:var(--fill);
    padding:4px;
  }
  .widget-icon img{ width:100%; height:100%; display:block; object-fit:contain; }
  .widget-titles{ flex:1; min-width:0; }
  .widget-name{ font-size:18px; font-weight:700; letter-spacing:-0.01em; line-height:1.2; }
  .widget-sub{ font-size:12.5px; color:var(--label-tertiary); font-weight:500; margin-top:1px; }

  .widget-rows{ margin-bottom:14px; }
  .widget-row{
    display:flex; justify-content:space-between; align-items:center;
    padding:8px 0;
    border-bottom:0.5px solid var(--separator);
    font-size:14.5px;
  }
  .widget-row:last-child{ border-bottom:none; }
  .widget-row .k{ color:var(--label); font-weight:500; }
  .widget-row .v{ color:var(--label-secondary); font-variant-numeric:tabular-nums; font-weight:500; }

  .chip-row{ display:flex; flex-wrap:wrap; gap:6px; margin-bottom:14px; }
  .chip{
    font-size:12px; font-weight:600;
    padding:5px 10px;
    border-radius:980px;
    background:var(--fill);
    color:var(--label-secondary);
  }

  .widget-cta{ margin-top:auto; }
  .order-link{
    display:flex; align-items:center; justify-content:center; gap:6px;
    width:100%;
    padding:12px 14px;
    border-radius:980px;
    background:var(--fill);
    color:var(--blue);
    font-size:14.5px; font-weight:600;
    text-decoration:none;
    transition:background .15s ease;
  }
  .order-link:hover{ background:rgba(10,132,255,0.16); }
  .order-link:active{ transform:scale(0.98); }
  .cta-row{ display:flex; gap:8px; }
  .learn-link{
    display:flex; align-items:center; justify-content:center; gap:5px;
    padding:12px 14px; border-radius:980px; border:0.5px solid var(--separator);
    color:var(--label-secondary); font-size:14.5px; font-weight:600; text-decoration:none;
    flex:0 0 auto; transition:border-color .15s ease, color .15s ease;
  }
  .learn-link:hover{ border-color:var(--blue); color:var(--blue); }
  .cta-row .order-link{ width:auto; flex:1; }

  /* Trust row */
  .trust-strip{
    margin-top:40px;
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(180px,1fr));
    gap:12px;
  }
  .trust-card{
    background:var(--sys-bg-secondary);
    border:0.5px solid var(--separator);
    border-radius:var(--radius-md);
    padding:16px;
    display:flex; align-items:center; gap:10px;
    font-size:13.5px; font-weight:600; color:var(--label-secondary);
  }
  .trust-dot{ width:8px; height:8px; border-radius:50%; background:var(--green); flex-shrink:0; }

  /* Register widget — large iOS widget style */
  .register-section{ padding:44px 0 20px; }
  .register-widget{
    position:relative;
    background:linear-gradient(155deg, rgba(10,132,255,0.14), rgba(10,132,255,0.02));
    backdrop-filter:blur(24px) saturate(180%);
    -webkit-backdrop-filter:blur(24px) saturate(180%);
    border:0.5px solid var(--separator);
    border-radius:28px;
    box-shadow:var(--card-shadow);
    padding:36px 32px;
    display:flex; flex-wrap:wrap; gap:32px;
    justify-content:space-between;
    align-items:center;
  }
  .register-left{ flex:1; min-width:260px; max-width:440px; }
  .register-badge{
    width:44px;height:44px;border-radius:12px;
    overflow:hidden; margin-bottom:16px;
  }
  .register-badge img{ width:100%; height:100%; display:block; }
  h2.register-title{ font-size:26px; font-weight:700; letter-spacing:-0.01em; line-height:1.15; margin-bottom:10px; }
  .register-copy{ font-size:14.5px; color:var(--label-secondary); line-height:1.55; }

  .register-form{
    display:flex; flex-direction:column; gap:10px;
    flex:1; min-width:260px; max-width:320px;
  }
  .register-form input, .register-form select{
    -webkit-appearance:none; appearance:none;
    background:var(--fill);
    border:0.5px solid var(--separator);
    border-radius:var(--radius-sm);
    padding:13px 14px;
    color:var(--label);
    font-family:inherit;
    font-size:15px;
  }
  .register-form input::placeholder{ color:var(--label-tertiary); }
  .register-form input:focus, .register-form select:focus{
    outline:2px solid var(--blue); outline-offset:1px;
  }
  .register-submit{
    margin-top:4px;
    padding:13px 16px;
    background:var(--blue);
    border:none; border-radius:980px;
    color:white; font-weight:700; font-size:15px;
    cursor:pointer;
    transition:background .12s ease, transform .12s ease;
  }
  .register-submit:hover{ background:#3399ff; }
  .register-submit:active{ transform:scale(0.98); }
  .form-note{ font-size:11.5px; color:var(--label-tertiary); text-align:center; }
  .form-note a{ color:var(--blue); text-decoration:none; }

  footer{
    max-width:980px; margin:56px auto 0; padding:24px 20px 0;
    border-top:0.5px solid var(--separator);
    display:flex; flex-wrap:wrap; gap:8px 22px;
    font-size:13px; color:var(--label-tertiary); font-weight:500;
  }
  footer a{ color:var(--blue); text-decoration:none; }
  footer .foot-name{ color:var(--label-secondary); font-weight:600; }

  /* Responsive tuning */
  @media (max-width:640px){
    .widget-grid{ grid-template-columns:1fr; }
    .register-widget{ padding:28px 22px; flex-direction:column; align-items:stretch; }
    .register-form{ max-width:none; }
    .hero{ padding:32px 0 24px; }
  }
  @media (min-width:900px){
    .widget-grid{ grid-template-columns:repeat(3, 1fr); }
  }