:root{
  --blue:#0877b8;
  --blue2:#0b94cd;
  --ink:#162431;
  --muted:#60778a;
  --line:#d8e6ef;
  --paper:#f8fcff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:Inter,Segoe UI,Arial,sans-serif;
  color:var(--ink);
  background:linear-gradient(135deg,#fff 0%,#f8fcff 48%,#eef8ff 100%);
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:radial-gradient(circle at 85% 20%,rgba(37,153,211,.08),transparent 32%),radial-gradient(circle at 8% 68%,rgba(71,169,213,.08),transparent 28%);
}

/* DESKTOP: whole landing page fits inside one viewport */
.page-shell{
  position:relative;
  z-index:2;
  width:min(100%,1600px);
  height:100vh;
  min-height:680px;
  margin:auto;
  padding:22px 48px 16px;
  display:grid;
  grid-template-rows:54px minmax(0,1fr) 28px;
  overflow:hidden;
}
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  min-height:0;
}
.microcopy{
  font-size:10px;
  line-height:1.52;
  letter-spacing:.36em;
  color:#8799a9;
  font-weight:600;
}
.lang{display:flex;gap:11px;align-items:center;font-size:14px;color:#9aa8b2}
.lang-btn{border:0;background:transparent;padding:3px 2px;color:#8998a5;font-weight:700;cursor:pointer;font-size:14px}
.lang-btn.active{color:var(--blue)}

.hero{
  display:grid;
  grid-template-columns:minmax(360px,.95fr) minmax(560px,1.15fr);
  gap:5vw;
  align-items:center;
  min-height:0;
  height:100%;
}
.visual{
  position:relative;
  height:100%;
  min-height:0;
  display:flex;
  align-items:center;
  justify-content:center;
}
.blueprint{
  position:absolute;
  width:62%;
  height:57%;
  max-height:480px;
  background:#12181d;
  border:7px solid white;
  box-shadow:0 10px 30px rgba(10,31,43,.18);
  overflow:hidden;
}
.blueprint::before,.blueprint::after{
  content:"";
  position:absolute;
  inset:8%;
  background:repeating-linear-gradient(0deg,transparent 0 24px,rgba(255,255,255,.15) 25px 26px),repeating-linear-gradient(90deg,transparent 0 32px,rgba(255,255,255,.12) 33px 34px);
  transform:rotate(3deg)
}
.blueprint::after{
  inset:18% 12%;
  border:1px solid rgba(255,255,255,.45);
  background:linear-gradient(36deg,transparent 48%,rgba(255,255,255,.55) 49% 50%,transparent 51%),linear-gradient(116deg,transparent 48%,rgba(255,255,255,.35) 49% 50%,transparent 51%)
}
.blueprint-a{left:1%;top:18%;transform:rotate(-15deg)}
.blueprint-b{left:25%;top:8%;transform:rotate(-11deg)}
.legacy-card{
  position:relative;
  z-index:3;
  width:min(390px,64%);
  padding:9px;
  background:#fff;
  border-radius:12px;
  box-shadow:0 15px 45px rgba(14,48,67,.28)
}
.legacy-card img{display:block;width:100%;height:auto;border-radius:6px}
.legacy-note{
  position:absolute;
  z-index:4;
  left:18%;
  bottom:4%;
  letter-spacing:.32em;
  text-transform:uppercase;
  font-size:9px;
  color:#456a83;
  font-weight:600
}

.content{
  align-self:center;
  min-height:0;
  padding:0;
}
.eyebrow{
  text-align:right;
  font-size:10px;
  letter-spacing:.34em;
  color:#8ba0b0;
  margin-bottom:16px;
  font-weight:700
}
h1{
  font-size:clamp(64px,6.35vw,104px);
  line-height:.88;
  margin:0 0 18px;
  letter-spacing:-.055em;
  font-weight:800
}
.blue{color:var(--blue)}
.dark{color:#101b24}
.rule{width:58px;height:3px;background:var(--blue);margin:0 0 17px 34%}
h2{
  font-size:clamp(34px,3.25vw,50px);
  line-height:1.02;
  margin:0 0 14px;
  font-weight:500;
  letter-spacing:-.03em
}
.lead{
  font-size:clamp(15px,1.12vw,19px);
  line-height:1.4;
  color:#395468;
  max-width:760px;
  margin:0 0 26px
}
.benefits{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  margin-bottom:24px
}
.benefit{
  padding:0 16px;
  text-align:center;
  min-height:84px;
  display:flex;
  flex-direction:column;
  justify-content:flex-start;
  align-items:center;
  gap:8px;
  border-right:1px solid var(--line);
  font-size:12px;
  line-height:1.25;
  color:#253d4d
}
.benefit:first-child{padding-left:0}
.benefit:last-child{border-right:0;padding-right:0}
.benefit svg{width:33px;height:33px;fill:none;stroke:var(--blue);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.cta-wrap{max-width:620px;margin:0 auto;text-align:center}
.cta{
  width:100%;
  min-height:58px;
  border:0;
  border-radius:12px;
  background:linear-gradient(135deg,#0b78bb,#0666a1);
  box-shadow:0 12px 26px rgba(10,112,172,.2);
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  color:white;
  font-size:17px;
  font-weight:700;
  cursor:pointer;
  transition:.2s transform,.2s box-shadow
}
.cta:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(10,112,172,.28)}
.cta svg,.contact-line svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.contact-line{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:10px;color:#0b6ea8}
.contact-line a{color:#0b6ea8;text-decoration:none;font-weight:600}
.offer-note{font-size:10px;line-height:1.4;color:#718696;margin:10px auto 0;max-width:560px}
footer{
  position:relative;
  z-index:3;
  display:flex;
  justify-content:space-between;
  align-items:end;
  font-size:9px;
  letter-spacing:.16em;
  color:#506a7c;
  text-transform:uppercase;
  padding:0
}
footer span{margin-left:14px}

.water{
  position:fixed;
  z-index:1;
  right:-7vw;
  bottom:-16vh;
  width:63vw;
  height:38vh;
  pointer-events:none;
  background:radial-gradient(ellipse at 55% 76%,rgba(4,112,177,.36) 0 1%,rgba(4,112,177,.16) 2% 8%,rgba(4,112,177,.08) 9% 14%,transparent 15%),linear-gradient(to bottom,transparent 0%,rgba(110,203,244,.08) 35%,rgba(71,176,225,.18) 100%);
  filter:blur(.1px)
}
.ripple{position:absolute;border:2px solid rgba(5,103,169,.28);border-radius:50%;left:53%;top:58%;transform:translate(-50%,-50%)}
.r1{width:14%;height:12%}.r2{width:28%;height:22%;opacity:.8}.r3{width:46%;height:34%;opacity:.55}.r4{width:68%;height:50%;opacity:.3}
.drop{position:absolute;left:53%;top:37%;width:34px;height:34px;border-radius:50%;background:radial-gradient(circle at 38% 30%,#fff 0 8%,#bdeaff 18%,#1795d0 48%,#075c96 72%,#e8f8ff 100%);box-shadow:0 0 18px rgba(9,118,184,.25)}

.modal{position:fixed;z-index:20;inset:0;background:rgba(8,22,31,.38);backdrop-filter:blur(8px);display:none;align-items:center;justify-content:center;padding:24px}
.modal.show{display:flex}
.modal-card{position:relative;width:min(520px,100%);background:rgba(255,255,255,.96);border:1px solid #dceaf2;border-radius:18px;box-shadow:0 28px 90px rgba(10,33,47,.28);padding:38px;text-align:center}
.modal-close{position:absolute;right:16px;top:12px;border:0;background:transparent;font-size:30px;color:#6a7d8c;cursor:pointer}
.modal-mark{display:inline-flex;width:64px;height:64px;border-radius:16px;align-items:center;justify-content:center;background:linear-gradient(135deg,#0c8bca,#065f99);color:#fff;font-weight:800;font-size:22px;margin-bottom:18px}
.modal-card h3{font-size:28px;margin:0 0 12px}
.modal-card p{color:#597184;line-height:1.55}
.modal-mail{display:inline-flex;margin-top:12px;padding:14px 24px;border-radius:10px;background:#0a75b5;color:#fff;text-decoration:none;font-weight:700}
.modal-help{font-size:12px!important;color:#9b6a24!important;margin-bottom:0}

/* slightly tighter on common 1366/1440/1600 × 768–900 screens */
@media (min-width:1101px) and (max-height:820px){
  .page-shell{padding-top:16px;grid-template-rows:44px minmax(0,1fr) 22px}
  .microcopy{font-size:9px}
  .eyebrow{margin-bottom:11px}
  h1{font-size:clamp(58px,5.9vw,92px);margin-bottom:13px}
  .rule{margin-bottom:12px}
  h2{font-size:clamp(31px,3vw,44px);margin-bottom:10px}
  .lead{font-size:15px;margin-bottom:18px}
  .benefits{margin-bottom:16px}
  .benefit{min-height:72px;font-size:11px;gap:6px}
  .benefit svg{width:29px;height:29px}
  .cta{min-height:52px;font-size:16px}
  .offer-note{margin-top:7px}
  .legacy-card{width:min(350px,60%)}
  .legacy-note{font-size:8px}
}

/* tablets and phones may scroll naturally */
@media (max-width:1100px){
  body{overflow-y:auto}
  .page-shell{height:auto;min-height:100vh;padding:28px;display:block;overflow:visible}
  .topbar{min-height:70px}
  .hero{grid-template-columns:1fr;gap:10px;height:auto}
  .visual{min-height:520px;height:auto}
  .content{padding:0 0 80px}
  .eyebrow{text-align:left}
  .rule{margin-left:0}
  .benefits{grid-template-columns:repeat(2,1fr);row-gap:28px}
  .benefit{min-height:100px;font-size:13px}
  .benefit:nth-child(2){border-right:0}
  .benefit:nth-child(3){padding-left:0}
  footer{font-size:10px;padding-bottom:6px}
  .water{width:100vw;right:-25vw;opacity:.7}
}
@media (max-width:640px){
  .page-shell{padding:20px 18px 20px}
  .topbar{min-height:72px}
  .microcopy{font-size:9px}
  .hero{min-height:auto}
  .visual{min-height:360px;margin-top:4px}
  .blueprint{width:70%;height:55%;border-width:5px}
  .legacy-card{width:74%;padding:7px}
  .legacy-note{font-size:8px;left:12%;bottom:0;letter-spacing:.26em}
  .content{padding-top:28px;padding-bottom:90px}
  .eyebrow{font-size:9px;line-height:1.6;margin-bottom:16px}
  h1{font-size:15vw;margin-bottom:22px}
  .rule{width:50px;height:2px;margin-bottom:18px}
  h2{font-size:38px}
  .lead{font-size:17px;margin-bottom:34px}
  .benefits{grid-template-columns:1fr 1fr;margin-bottom:30px}
  .benefit{padding:0 12px;font-size:12px;min-height:110px}
  .benefit svg{width:34px;height:34px}
  .cta{min-height:66px;font-size:17px;border-radius:12px}
  .offer-note{font-size:11px}
  footer{font-size:9px;letter-spacing:.08em}
  .water{bottom:-9vh;height:28vh;right:-10vw;width:120vw}
  .drop{width:26px;height:26px}
  .modal-card{padding:32px 22px}
}

.archive-footer-link{color:#5d788b;text-decoration:none;border-bottom:1px solid rgba(93,120,139,.35)}
.archive-footer-link:hover{color:var(--blue);border-bottom-color:var(--blue)}

/* SEO V4: visible H2O acquisition statement without changing the layout */
.search-intent{margin:8px 0 0;font-size:12px;line-height:1.45;color:#5b7690;letter-spacing:.01em}
.search-intent strong{color:#0d78b8;font-weight:700}
@media (max-width: 900px){.search-intent{font-size:12px}}

/* SALE CTA V5: direct secure purchase through Atom */
.purchase-actions{
  display:grid;
  grid-template-columns:1.2fr .9fr;
  gap:12px;
}
.cta{text-decoration:none}
.cta-buy{
  background:linear-gradient(135deg,#0b78bb,#06558b);
}
.cta-contact{
  background:#fff;
  color:#0b6ea8;
  border:1px solid #b9d9ea;
  box-shadow:none;
}
.cta-contact:hover{
  box-shadow:0 10px 24px rgba(10,112,172,.12);
}
.secure-note{
  margin:8px 0 0;
  font-size:10px;
  line-height:1.35;
  color:#718696;
  letter-spacing:.03em;
}
@media (max-width:640px){
  .purchase-actions{grid-template-columns:1fr}
  .cta-buy,.cta-contact{min-height:62px}
}