:root{
    --ground:#F4F7F4; --surface:#FFFFFF; --surface-2:#EEF4EF;
    --ink:#12291F; --ink-soft:#4C6157; --line:#E1EAE3;
    --brand:#1D9E75; --brand-2:#22B183; --brand-deep:#0F2E24;
    --amber:#B9812A; --danger:#B23A3A;
    --shadow:0 1px 2px rgba(15,46,36,.04),0 12px 30px rgba(15,46,36,.06);
    --radius:18px;
    --display:"Fraunces",Georgia,"Times New Roman",serif;
    --body:"Figtree",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  }
  @media (prefers-color-scheme:dark){
    :root:not([data-theme="light"]){
      --ground:#0B1310; --surface:#111E19; --surface-2:#16241E;
      --ink:#E9F1EC; --ink-soft:#9BB1A6; --line:#213229;
      --brand:#38C295; --brand-2:#54D2A8; --brand-deep:#BEEAD7;
      --amber:#D9A24A; --danger:#E06A6A;
      --shadow:0 1px 2px rgba(0,0,0,.3),0 16px 40px rgba(0,0,0,.35);
    }
  }
  :root[data-theme="dark"]{
    --ground:#0B1310; --surface:#111E19; --surface-2:#16241E;
    --ink:#E9F1EC; --ink-soft:#9BB1A6; --line:#213229;
    --brand:#38C295; --brand-2:#54D2A8; --brand-deep:#BEEAD7;
    --amber:#D9A24A; --danger:#E06A6A;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 16px 40px rgba(0,0,0,.35);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;background:var(--ground);color:var(--ink);
    font-family:var(--body);font-size:17px;line-height:1.6;
    -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  }
  .wrap{max-width:1120px;margin:0 auto;padding:0 24px}
  h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.08;letter-spacing:-.01em;text-wrap:balance;margin:0}
  p{margin:0}
  a{color:inherit;text-decoration:none}
  .eyebrow{font-size:12.5px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--brand)}
  .muted{color:var(--ink-soft)}

  /* header */
  header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--ground) 82%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;gap:24px;height:68px}
  .brand{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:600;font-size:20px;letter-spacing:-.01em}
  .brand svg{width:30px;height:30px;flex:none}
  .brand b{color:var(--brand)}
  .nav .links{display:flex;gap:26px;margin-left:auto;font-size:15px;font-weight:500}
  .nav .links a{color:var(--ink-soft)}
  .nav .links a:hover{color:var(--ink)}
  .nav .tools{display:flex;align-items:center;gap:10px}
  .langbtn,.themebtn{border:1px solid var(--line);background:var(--surface);color:var(--ink-soft);border-radius:999px;height:36px;cursor:pointer;font-family:var(--body);font-weight:600;font-size:13px}
  .langbtn{padding:0 12px;letter-spacing:.02em}
  .themebtn{width:36px;display:grid;place-items:center;font-size:15px}
  .btn{display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 20px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:transform .12s ease,box-shadow .2s ease}
  .btn.primary{background:var(--brand);color:#fff}
  .btn.primary:hover{transform:translateY(-1px);box-shadow:0 8px 22px color-mix(in srgb,var(--brand) 40%,transparent)}
  .btn.ghost{background:transparent;border-color:var(--line);color:var(--ink)}
  .btn.ghost:hover{border-color:var(--brand)}
  :focus-visible{outline:2.5px solid var(--brand);outline-offset:3px;border-radius:6px}

  /* hero */
  .hero{padding:76px 0 40px;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
  .hero h1{font-size:clamp(38px,5.4vw,62px);font-weight:600}
  .hero h1 em{font-style:italic;color:var(--brand)}
  .hero .sub{margin-top:22px;font-size:19px;max-width:34ch;color:var(--ink-soft)}
  .hero .cta{margin-top:30px;display:flex;gap:12px;flex-wrap:wrap}
  .hero .note{margin-top:18px;font-size:13.5px;color:var(--ink-soft);display:flex;align-items:center;gap:8px}
  .dot{width:7px;height:7px;border-radius:50%;background:var(--brand)}

  /* product card in hero */
  .device{background:var(--surface);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow);padding:20px;position:relative}
  .device .head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
  .device .head .t{font-family:var(--display);font-weight:600;font-size:19px}
  .pill{font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;background:color-mix(in srgb,var(--brand) 14%,transparent);color:var(--brand-deep)}
  :root[data-theme="dark"] .pill,:root:not([data-theme="light"]) .pill{color:var(--brand)}
  .trend-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-top:1px solid var(--line)}
  .trend-row .lbl{font-size:14.5px;color:var(--ink-soft)}
  .trend-row .val{font-family:var(--display);font-weight:600;font-size:17px}
  .delta{font-size:12.5px;font-weight:600;padding:3px 9px;border-radius:999px;display:inline-flex;gap:4px;align-items:center;margin-left:10px}
  .delta.up{background:color-mix(in srgb,var(--danger) 14%,transparent);color:var(--danger)}
  .delta.good{background:color-mix(in srgb,var(--brand) 16%,transparent);color:var(--brand-deep)}
  :root[data-theme="dark"] .delta.good,:root:not([data-theme="light"]) .delta.good{color:var(--brand)}
  .delta.flat{background:var(--surface-2);color:var(--ink-soft)}
  .bars{display:flex;align-items:flex-end;gap:7px;height:64px;margin:6px 2px 16px}
  .bars i{flex:1;background:color-mix(in srgb,var(--brand) 22%,transparent);border-radius:6px 6px 3px 3px}
  .bars i.hi{background:var(--brand)}
  .device .foot{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--ink-soft);border-top:1px solid var(--line);padding-top:13px}
  .badge-ok{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand-deep);background:color-mix(in srgb,var(--brand) 13%,transparent);padding:4px 10px;border-radius:999px;font-size:12px}
  :root[data-theme="dark"] .badge-ok,:root:not([data-theme="light"]) .badge-ok{color:var(--brand)}

  /* stance strip */
  .stance{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface)}
  .stance .wrap{display:flex;gap:40px;flex-wrap:wrap;padding:22px 24px;align-items:center;justify-content:center;font-size:14.5px;color:var(--ink-soft)}
  .stance b{color:var(--ink);font-weight:600}

  section{padding:84px 0}
  .sec-head{max-width:60ch;margin-bottom:44px}
  .sec-head h2{font-size:clamp(28px,3.6vw,40px);margin-top:12px}
  .sec-head p{margin-top:14px;font-size:18px;color:var(--ink-soft)}

  .pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
  .card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
  .card .ic{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:color-mix(in srgb,var(--brand) 12%,transparent);color:var(--brand);margin-bottom:16px}
  .card h3{font-size:19px}
  .card p{margin-top:8px;font-size:15px;color:var(--ink-soft)}

  /* how */
  .how{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:s}
  .step{padding:26px 24px 26px 0;position:relative}
  .step:not(:last-child){border-right:1px solid var(--line);padding-right:28px;margin-right:4px}
  .step .n{font-family:var(--display);font-weight:600;font-size:15px;color:var(--brand);display:inline-flex;align-items:center;gap:8px;margin-bottom:12px}
  .step .n::before{counter-increment:s;content:counter(s,decimal-leading-zero);background:color-mix(in srgb,var(--brand) 13%,transparent);border-radius:8px;padding:3px 8px;font-size:13px}
  .step h3{font-size:18px}
  .step p{margin-top:7px;font-size:14.5px;color:var(--ink-soft)}

  /* features */
  .feat{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
  .feat .card h3{font-size:17px;display:flex;align-items:center;gap:9px}
  .feat .card p{font-size:14.5px}
  .kbd{font-size:12px;color:var(--brand);font-weight:600}

  /* privacy */
  .privacy{background:var(--brand-deep);color:#EAF6F0}
  :root[data-theme="dark"] .privacy,:root:not([data-theme="light"]) .privacy{background:#0A1512;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .privacy .wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
  .privacy h2{color:#fff;font-size:clamp(26px,3.4vw,38px)}
  :root[data-theme="dark"] .privacy h2,:root:not([data-theme="light"]) .privacy h2{color:var(--ink)}
  .privacy p{margin-top:16px;color:#BFE0D2}
  :root[data-theme="dark"] .privacy p,:root:not([data-theme="light"]) .privacy p{color:var(--ink-soft)}
  .privacy ul{list-style:none;margin:0;padding:0;display:grid;gap:14px}
  .privacy li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:#DCEEE6}
  :root[data-theme="dark"] .privacy li,:root:not([data-theme="light"]) .privacy li{color:var(--ink)}
  .privacy li svg{flex:none;margin-top:2px;color:var(--brand-2)}

  /* final cta */
  .final{text-align:center}
  .final h2{font-size:clamp(30px,4vw,46px)}
  .final p{margin:16px auto 0;max-width:46ch;font-size:18px;color:var(--ink-soft)}
  .final .cta{margin-top:28px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

  footer{border-top:1px solid var(--line);background:var(--surface);padding:44px 0 40px;font-size:14px}
  footer .grid{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;align-items:flex-start}
  footer .links{display:flex;gap:40px;flex-wrap:wrap}
  footer .col{display:grid;gap:9px}
  footer .col strong{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);font-weight:600}
  footer .col a{color:var(--ink-soft)}
  footer .col a:hover{color:var(--brand)}
  footer .base{margin-top:30px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--ink-soft);font-size:13px}

  @media (max-width:900px){
    .hero{grid-template-columns:1fr;gap:36px;padding-top:52px}
    .pillars,.feat{grid-template-columns:1fr 1fr}
    .steps{grid-template-columns:1fr 1fr}
    .step{border-right:0!important;border-bottom:1px solid var(--line);padding:22px 0}
    .privacy .wrap{grid-template-columns:1fr}
    .nav .links{display:none}
  }
  @media (max-width:560px){
    .pillars,.feat,.steps{grid-template-columns:1fr}
    body{font-size:16px}
  }
  @media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}

/* ---- content sub-pages (features / privacy / faq / contact) ---- */
.page-hero{padding:64px 0 20px}
.page-hero h1{font-size:clamp(32px,4.6vw,52px);font-weight:600}
.page-hero .sub{margin-top:16px;font-size:19px;color:var(--ink-soft);max-width:56ch}
.container{max-width:760px;margin:0 auto;padding:0 24px}
.prose{padding:20px 0 40px}
.prose h2{font-size:clamp(22px,2.6vw,28px);margin:38px 0 12px}
.prose h3{font-family:var(--display);font-weight:600;font-size:19px;margin:26px 0 8px}
.prose p,.prose li{font-size:16.5px;color:var(--ink-soft);line-height:1.7}
.prose p{margin:12px 0}
.prose ul{margin:12px 0;padding-left:22px;display:grid;gap:8px}
.prose a{color:var(--brand);font-weight:600}
.prose .updated{font-size:13.5px;color:var(--ink-soft);margin-top:6px}
.lead-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin:20px 0;box-shadow:var(--shadow)}
.lead-card p{margin:0;color:var(--ink);font-size:16px}
/* faq */
.faq{display:grid;gap:12px;padding:8px 0 40px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:2px 20px;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:600;font-size:17px;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-size:22px;font-weight:400;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0 0 18px;color:var(--ink-soft);font-size:15.5px;line-height:1.65}
/* form */
.form{display:grid;gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:var(--shadow);margin:8px 0 40px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:grid;gap:7px}
.field label{font-size:13.5px;font-weight:600;color:var(--ink)}
.field input,.field textarea,.field select{font-family:var(--body);font-size:16px;color:var(--ink);background:var(--ground);border:1px solid var(--line);border-radius:11px;padding:12px 14px;width:100%}
.field textarea{resize:vertical;min-height:130px}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 18%,transparent)}
.form .actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.form .status{font-size:14px;font-weight:600}
.form .status.ok{color:var(--brand)}
.form .status.err{color:var(--danger)}
.contact-side{display:grid;gap:14px;align-content:start}
.contact-side .card h3{font-size:16px;margin:0 0 4px}
.contact-side .card p{margin:0;font-size:14.5px;color:var(--ink-soft)}
.two-col{display:grid;grid-template-columns:1.3fr .9fr;gap:26px;align-items:start;padding-bottom:40px}
@media (max-width:820px){.two-col{grid-template-columns:1fr}.form .row{grid-template-columns:1fr}}