:root{
    --ink:#0f2b2a; --ink-soft:#3d5b59; --muted:#6d8582;
    --teal:#0B7A75; --teal-deep:#083f3c; --teal-bright:#12a29b;
    --paper:#f3f6f5; --card:#ffffff; --line:#dfe8e6;
    --amber:#E8A33D; --wash:#e9f1f0;
    --maxw:1320px;
    --font-head:'Archivo',system-ui,sans-serif;
    --font-body:'Inter',system-ui,sans-serif;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body),system-ui,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased;}
  h1,h2,h3{font-family:var(--font-head),system-ui,sans-serif;line-height:1.05;margin:0;}
  a{color:inherit;text-decoration:none;}
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
  .btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-body);font-weight:600;font-size:15px;border-radius:999px;padding:12px 22px;cursor:pointer;border:1px solid transparent;transition:transform .12s ease, background .12s ease, box-shadow .12s;}
  .btn-primary{background:var(--teal);color:#fff;}
  .btn-primary:hover{background:var(--teal-deep);transform:translateY(-1px);box-shadow:0 8px 22px rgba(8,63,60,.22);}
  .btn-ghost{background:transparent;color:var(--teal-deep);border-color:var(--line);}
  .btn-ghost:hover{border-color:var(--teal);}
  .eyebrow{font-family:'Spline Sans Mono',monospace;font-size:12px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);}

  /* header */
  header{position:sticky;top:0;z-index:20;background:rgba(243,246,245,.86);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);}
  .navbar{display:flex;align-items:center;justify-content:space-between;height:64px;}
  .brand{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:800;font-size:18px;letter-spacing:-.01em;}
  .brand .mark{width:30px;height:30px;border-radius:8px;background:var(--teal);color:#fff;display:grid;place-items:center;font-family:'Spline Sans Mono';font-weight:700;font-size:17px;}
  .brand .mark-img{background:#06201f;overflow:hidden;padding:0;}
  .brand .mark-img img{width:100%;height:100%;object-fit:cover;border-radius:8px;display:block;}
  .nav-links{display:flex;align-items:center;gap:26px;}
  .nav-links a{font-size:14.5px;font-weight:500;color:var(--ink-soft);}
  .nav-links a:hover{color:var(--teal-deep);}
  @media(max-width:720px){.nav-links a:not(.btn){display:none;}}

  /* hero / snellen chart */
  .hero{padding:64px 0 40px;}
  .hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center;}
  .hero-copy{max-width:600px;}
  .hero-h1{font-family:var(--font-head);font-weight:900;font-size:clamp(34px,4.6vw,62px);line-height:1.02;letter-spacing:-.025em;margin:14px 0 0;}
  .hero-h1 em{font-style:normal;color:var(--teal);}
  .hero-lead{font-size:18px;color:var(--ink-soft);margin:18px 0 26px;max-width:540px;}
  .hero-copy .hero-cta{display:flex;gap:12px;justify-content:flex-start;flex-wrap:wrap;}
  .hero-copy .hero-note{margin-top:14px;text-align:left;}
  .hero-chart{justify-self:end;width:100%;max-width:440px;}
  @media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:32px;}.hero-chart{order:-1;justify-self:center;max-width:360px;}.hero-copy{max-width:none;}}
  .chart{display:grid;grid-template-columns:64px 1fr;gap:0 22px;align-items:center;}
  .scale{display:flex;flex-direction:column;justify-content:space-between;height:100%;border-right:1px solid var(--line);padding-right:14px;}
  .acuity{font-family:'Spline Sans Mono',monospace;font-size:11px;color:var(--muted);text-align:right;letter-spacing:.04em;line-height:2.3;}
  .acuity b{color:var(--teal);}
  .rows{display:flex;flex-direction:column;gap:2px;text-align:center;}
  .row{font-family:var(--font-head);font-weight:900;color:var(--ink);letter-spacing:.14em;text-transform:uppercase;line-height:1.02;}
  .r1{font-size:clamp(56px,13vw,132px);color:var(--teal-deep);}
  .logo-optotype{width:clamp(104px,19vw,150px);height:auto;display:block;margin:0 auto 4px;filter:drop-shadow(0 6px 20px rgba(8,63,60,.28));}
  .r2{font-size:clamp(30px,7.2vw,74px);}
  .r3{font-size:clamp(17px,3.8vw,38px);color:var(--teal);}
  .r4{font-size:clamp(12px,2.3vw,22px);color:var(--ink-soft);letter-spacing:.2em;}
  .r5{font-family:'Spline Sans Mono',monospace;font-weight:600;font-size:clamp(10px,1.4vw,13px);letter-spacing:.22em;color:var(--muted);}
  .hero-sub{max-width:660px;margin:30px auto 0;text-align:center;}
  .hero-sub p{font-size:18px;color:var(--ink-soft);margin:0 0 22px;}
  .hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}
  .hero-note{margin-top:16px;font-family:'Spline Sans Mono',monospace;font-size:12px;color:var(--muted);letter-spacing:.02em;}

  /* stat strip */
  .stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--wash);}
  .stats .wrap{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;padding:26px 24px;}
  .stat b{display:block;font-family:var(--font-head);font-weight:800;font-size:30px;color:var(--teal-deep);line-height:1;}
  .stat span{font-size:13px;color:var(--muted);}
  @media(max-width:720px){.stats .wrap{grid-template-columns:repeat(2,1fr);}}

  /* sections */
  section.block{padding:64px 0;}
  .section-head{max-width:640px;margin-bottom:36px;}
  .section-head h2{font-size:clamp(26px,4vw,38px);font-weight:800;letter-spacing:-.02em;margin-top:10px;}
  .section-head p{color:var(--ink-soft);font-size:16.5px;margin:12px 0 0;}

  .features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
  .feature{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;position:relative;}
  .badge{position:absolute;top:14px;right:14px;font-family:'Spline Sans Mono',monospace;font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:999px;}
  .badge.soon{color:#a9701a;background:rgba(232,163,61,.14);border:1px solid rgba(232,163,61,.4);}
  .badge.live{color:var(--teal-deep);background:rgba(11,122,117,.12);border:1px solid rgba(11,122,117,.34);}
  .feature .fi{width:40px;height:40px;border-radius:10px;background:var(--wash);color:var(--teal);display:grid;place-items:center;margin-bottom:14px;}
  .feature h3{font-size:17px;font-weight:700;margin-bottom:6px;}
  .feature p{font-size:14px;color:var(--ink-soft);margin:0;}
  @media(max-width:820px){.features{grid-template-columns:1fr;}}
  .aud{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
  .aud-col{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;}
  .aud-col h3{font-size:19px;font-weight:800;margin:8px 0 6px;letter-spacing:-.01em;}
  .aud-col p{font-size:14.5px;color:var(--ink-soft);margin:0;}
  @media(max-width:720px){.aud{grid-template-columns:1fr;}}

  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--card);}
  .step{padding:26px;border-right:1px solid var(--line);}
  .step:last-child{border-right:none;}
  .step .n{font-family:'Spline Sans Mono';font-weight:700;color:var(--teal);font-size:13px;letter-spacing:.1em;}
  .step h3{font-size:17px;font-weight:700;margin:8px 0 6px;}
  .step p{font-size:14px;color:var(--ink-soft);margin:0;}
  @media(max-width:820px){.steps{grid-template-columns:1fr;}.step{border-right:none;border-bottom:1px solid var(--line);}.step:last-child{border-bottom:none;}}

  /* pricing */
  .pricing{background:var(--teal-deep);color:#eaf5f4;}
  .pricing .section-head h2{color:#fff;}
  .pricing .section-head p{color:#a9cfcc;}
  .plans{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:760px;}
  .plan{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.16);border-radius:18px;padding:28px;position:relative;}
  .plan.featured{background:#fff;color:var(--ink);border-color:#fff;}
  .plan .tag{position:absolute;top:-11px;right:22px;background:var(--amber);color:#3a2600;font-family:'Spline Sans Mono';font-weight:700;font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:4px 12px;border-radius:999px;}
  .plan .pname{font-family:var(--font-head);font-weight:700;font-size:15px;letter-spacing:.02em;opacity:.9;}
  .plan .price{font-family:var(--font-head);font-weight:900;font-size:46px;line-height:1;margin:12px 0 2px;display:flex;align-items:baseline;gap:6px;}
  .plan .price .cur{font-size:24px;font-weight:700;}
  .plan .per{font-size:13.5px;opacity:.7;}
  .plan ul{list-style:none;padding:0;margin:20px 0 24px;display:flex;flex-direction:column;gap:9px;}
  .plan li{font-size:14px;display:flex;gap:9px;align-items:flex-start;}
  .plan li svg{flex:none;margin-top:2px;}
  .plan .btn{width:100%;justify-content:center;}
  .plan.dark .btn{background:#fff;color:var(--teal-deep);}
  .plan.dark .btn:hover{background:#eaf5f4;}
  .save{color:var(--amber);font-weight:600;font-size:13.5px;font-family:'Spline Sans Mono';}
  @media(max-width:720px){.plans{grid-template-columns:1fr;}}

  .preview-card{margin-top:22px;max-width:760px;background:rgba(255,255,255,.06);border:1px dashed rgba(255,255,255,.3);border-radius:14px;padding:18px 20px;font-size:14px;color:#cfe6e4;}
  .preview-card b{color:#fff;}

  /* disclaimer / footer */
  .disc{background:var(--paper);border-top:1px solid var(--line);}
  .disc .wrap{padding:28px 24px;}
  .disc p{font-size:12.5px;color:var(--muted);margin:0;max-width:820px;}
  footer{background:var(--card);border-top:1px solid var(--line);}
  footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:26px 24px;flex-wrap:wrap;}
  footer .brand{font-size:16px;}
  footer .fnav{display:flex;gap:20px;font-size:13.5px;color:var(--muted);}
  footer .fnav a:hover{color:var(--teal-deep);}

  @media(prefers-reduced-motion:no-preference){
    .row{opacity:0;transform:translateY(8px);animation:rise .6s cubic-bezier(.2,.7,.2,1) forwards;}
    .r1{animation-delay:.05s}.r2{animation-delay:.14s}.r3{animation-delay:.23s}.r4{animation-delay:.32s}.r5{animation-delay:.41s}
    @keyframes rise{to{opacity:1;transform:none;}}
  }
a.feature{display:block;text-decoration:none;color:inherit;}
.feature-link{cursor:pointer;transition:border-color .14s,box-shadow .14s,transform .14s;}
.feature-link:hover{border-color:var(--teal);box-shadow:0 8px 26px rgba(10,79,76,.10);transform:translateY(-2px);}
.feature-go{display:inline-block;margin-top:12px;font-size:13.5px;font-weight:600;color:var(--teal-deep);}
@media(max-width:820px){.stats .wrap{grid-template-columns:repeat(2,1fr);}}

.visitor-count{text-align:center;font-size:12.5px;color:var(--muted);padding:4px 0 22px;letter-spacing:.02em;}
.vc-eye{color:var(--teal);}

.nav-links a.btn-primary{color:#fff;}
.hero-copy .eyebrow{font-size:15px;font-weight:700;letter-spacing:.13em;}

.nav-welcome{font-size:14px;font-weight:600;color:var(--ink);}
@media(max-width:720px){.nav-welcome{display:none;}}