/* soubor: assets/css/style.css */
:root{
    --ink:#061522;
    --ink-2:#0b2a43;
    --muted:#617589;
    --blue:#0d9ec7;
    --blue-2:#67e7ff;
    --ice:#eafaff;
    --white:#ffffff;
    --silver:#dce9f1;
    --line:rgba(9,42,69,.14);
    --dark:#020916;
    --dark-2:#061a2d;
    --shadow:0 30px 90px rgba(0,31,58,.18);
    --shadow-dark:0 40px 120px rgba(0,0,0,.42);
    --radius:32px;
    --header-h:86px;
    --max:1500px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--white)}
body{
    margin:0;
    font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    color:var(--ink);
    background:linear-gradient(180deg,#fff 0%,#f3fbff 42%,#fff 100%);
    text-rendering:optimizeLegibility;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.skip-link{position:absolute;left:-999px;top:12px;z-index:9999;background:#fff;color:#000;padding:12px 18px;border-radius:12px}
.skip-link:focus{left:12px}

.site-header{
    position:fixed;
    inset:18px 22px auto 22px;
    z-index:1000;
    min-height:68px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    padding:12px 14px 12px 18px;
    background:rgba(255,255,255,.72);
    border:1px solid rgba(255,255,255,.72);
    border-radius:999px;
    box-shadow:0 20px 70px rgba(0,40,80,.12);
    backdrop-filter:blur(22px);
    transition:background .25s ease, transform .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.92);box-shadow:0 20px 80px rgba(0,40,80,.18)}
.brand{display:flex;align-items:center;min-width:220px}
.brand img{width:230px;height:auto}
.main-nav{display:flex;align-items:center;gap:8px;color:#082238;font-size:14px;font-weight:700}
.main-nav a{padding:12px 14px;border-radius:999px;transition:background .2s ease,color .2s ease,transform .2s ease}
.main-nav a:hover,.main-nav a:focus{background:rgba(13,158,199,.1);color:#006f92;outline:0}
.nav-cta{background:#06233d!important;color:#fff!important;box-shadow:0 14px 35px rgba(6,35,61,.18)}
.nav-toggle{display:none;width:48px;height:48px;border:0;border-radius:50%;background:#06233d;align-items:center;justify-content:center;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:20px;height:2px;background:#fff;border-radius:99px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-active span:nth-child(2){opacity:0}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.hero{
    position:relative;
    min-height:100vh;
    display:grid;
    grid-template-columns:minmax(0,1.12fr) minmax(330px,.55fr);
    align-items:center;
    gap:42px;
    padding:150px clamp(24px,5vw,92px) 70px;
    overflow:hidden;
    color:#fff;
    background:#061827;
}
.hero-bg{
    position:absolute;
    inset:0;
    background-image:linear-gradient(90deg,rgba(2,12,25,.88) 0%,rgba(2,12,25,.60) 40%,rgba(2,12,25,.08) 76%),url('../img/hero-water.webp');
    background-size:cover;
    background-position:center;
    transform:scale(1.04);
    animation:heroZoom 18s ease-in-out infinite alternate;
}
.hero:after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:-1px;height:24vh;
    background:linear-gradient(180deg,rgba(255,255,255,0),#fff 82%);
    pointer-events:none;
}
.hero-content,.hero-card,.scroll-indicator,.hero-orbit{position:relative;z-index:2}
.eyebrow{
    margin:0 0 18px;
    color:var(--blue);
    text-transform:uppercase;
    letter-spacing:.18em;
    font-size:12px;
    font-weight:900;
}
.hero .eyebrow{color:#8ef3ff;text-shadow:0 0 32px rgba(97,231,255,.42)}
.hero h1{
    max-width:980px;
    margin:0;
    font-size:clamp(58px,8.2vw,148px);
    line-height:.86;
    letter-spacing:-.075em;
    font-weight:900;
}
.hero-lead{
    max-width:760px;
    margin:28px 0 0;
    color:rgba(229,250,255,.88);
    font-size:clamp(18px,1.6vw,25px);
    line-height:1.55;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:54px;
    padding:15px 24px;
    border-radius:999px;
    border:1px solid transparent;
    font-weight:900;
    line-height:1;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease;
}
.btn:hover,.btn:focus{transform:translateY(-2px);outline:0}
.btn-primary{background:linear-gradient(135deg,#7df1ff,#12a4ca);color:#032038;box-shadow:0 20px 50px rgba(75,223,255,.28)}
.btn-primary:hover{box-shadow:0 25px 70px rgba(75,223,255,.42)}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.28);color:#fff;backdrop-filter:blur(10px)}
.hero-metrics{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:42px;
    max-width:780px;
}
.hero-metrics div{
    min-width:150px;
    padding:17px 20px;
    border:1px solid rgba(255,255,255,.16);
    border-radius:22px;
    background:rgba(255,255,255,.07);
    backdrop-filter:blur(14px);
}
.hero-metrics strong{display:block;font-size:25px;line-height:1;font-weight:900;color:#fff}
.hero-metrics span{display:block;margin-top:8px;color:rgba(229,250,255,.72);font-size:13px}
.hero-card{
    align-self:end;
    margin-bottom:6vh;
    padding:30px;
    border-radius:34px;
    background:linear-gradient(145deg,rgba(255,255,255,.18),rgba(255,255,255,.06));
    border:1px solid rgba(255,255,255,.22);
    box-shadow:var(--shadow-dark);
    backdrop-filter:blur(22px);
}
.hero-card-label{display:inline-block;margin-bottom:18px;padding:7px 12px;border-radius:999px;background:rgba(129,240,255,.18);color:#a9f6ff;font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.12em}
.hero-card h2{margin:0;font-size:clamp(28px,3vw,44px);line-height:1.02;letter-spacing:-.045em}
.hero-card p{margin:18px 0 0;color:rgba(229,250,255,.78);line-height:1.65}
.hero-orbit{position:absolute;right:22vw;top:22vh;width:210px;height:210px;border:1px solid rgba(137,240,255,.2);border-radius:50%;animation:orbit 12s linear infinite}
.hero-orbit span{position:absolute;width:14px;height:14px;border-radius:50%;background:#84f4ff;box-shadow:0 0 36px #84f4ff}
.hero-orbit span:nth-child(1){left:50%;top:-7px}.hero-orbit span:nth-child(2){right:2px;bottom:32px}.hero-orbit span:nth-child(3){left:20px;bottom:16px}
.scroll-indicator{position:absolute;left:clamp(24px,5vw,92px);bottom:28px;color:rgba(255,255,255,.75);font-size:12px;text-transform:uppercase;letter-spacing:.2em;font-weight:900;z-index:3;writing-mode:vertical-rl}
.scroll-indicator:after{content:"";display:block;width:1px;height:70px;background:linear-gradient(#8ef3ff,transparent);margin:12px auto 0}

.section{position:relative;padding:clamp(78px,9vw,150px) clamp(22px,5vw,92px)}
.section>*,.site-footer>*{position:relative;z-index:2}
.intro-band{padding-top:48px;padding-bottom:48px;background:#fff}
.wide-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.wide-grid p{margin:0;padding:34px 30px;background:#fff;font-size:clamp(22px,2.4vw,42px);line-height:1.05;font-weight:900;letter-spacing:-.045em}
.split,.product-section,.private-label,.contact{max-width:var(--max);margin:auto;display:grid;grid-template-columns:minmax(0,.95fr) minmax(360px,.7fr);gap:clamp(34px,6vw,92px);align-items:center}
.section-copy h2,.product-copy h2,.label-copy h2,.contact-copy h2,.section-heading h2,.tech-panel h2,.proof h2{
    margin:0;
    font-size:clamp(38px,5vw,78px);
    line-height:.96;
    letter-spacing:-.06em;
    font-weight:950;
}
.section-copy p,.product-copy p,.label-copy p,.contact-copy p,.section-heading p,.tech-panel p,.proof p{font-size:18px;line-height:1.75;color:var(--muted)}
.section-copy p:not(.eyebrow),.product-copy p,.label-copy p,.contact-copy p,.tech-panel p{max-width:760px}
.info-stack{display:grid;gap:16px}
.info-stack article,.reason,.audience-card,.science-card,.configurator,.contact-form-wrap,details{
    background:rgba(255,255,255,.78);
    border:1px solid rgba(6,35,61,.12);
    box-shadow:var(--shadow);
    backdrop-filter:blur(18px);
}
.info-stack article{padding:26px;border-radius:28px}
.info-stack span{display:block;margin-bottom:20px;color:#0e9cc2;font-weight:950;letter-spacing:.14em}
h3{margin:0 0 12px;font-size:24px;letter-spacing:-.035em;line-height:1.15}
.info-stack p,.reason p,.audience-card p,.b2b-card p,.faq p{margin:0;color:var(--muted);line-height:1.65}
.product-section{max-width:none;background:radial-gradient(circle at 18% 40%,rgba(105,230,255,.2),transparent 30%),linear-gradient(180deg,#f8fdff,#eaf8ff)}
.product-visual img{width:100%;border-radius:0;box-shadow:0 50px 140px rgba(0,50,88,.18)}
.check-list{list-style:none;padding:0;margin:28px 0 0;display:grid;gap:12px}
.check-list li{position:relative;padding-left:34px;color:#274255;font-weight:750}
.check-list li:before{content:"";position:absolute;left:0;top:.15em;width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,#7ef1ff,#0da4cb);box-shadow:0 8px 20px rgba(13,158,199,.2)}
.check-list li:after{content:"";position:absolute;left:7px;top:.48em;width:8px;height:4px;border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg)}
.center{text-align:center;margin-left:auto;margin-right:auto}.section-heading{max-width:980px;margin-bottom:42px}.section-heading.center p:not(.eyebrow){margin-left:auto;margin-right:auto;max-width:780px}
.reasons{background:#fff}.reason-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.reason{padding:30px;border-radius:30px}.reason b{display:block;margin-bottom:28px;color:#0e9cc2;letter-spacing:.16em}.reason:hover{transform:translateY(-4px);transition:transform .2s ease}
.technology{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,.42fr);gap:22px;align-items:stretch;background:#061525;color:#fff;overflow:hidden}.technology:before{content:"";position:absolute;inset:-10%;background:radial-gradient(circle at 30% 35%,rgba(88,230,255,.2),transparent 30%),radial-gradient(circle at 90% 70%,rgba(255,255,255,.11),transparent 30%);filter:blur(10px)}.tech-panel{padding:clamp(34px,5vw,72px);border-radius:42px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.07);box-shadow:var(--shadow-dark);backdrop-filter:blur(18px)}.tech-panel .eyebrow{color:#88efff}.tech-panel p{color:rgba(231,250,255,.78)}.timeline{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:36px}.timeline div{padding:22px;border:1px solid rgba(255,255,255,.13);border-radius:24px;background:rgba(255,255,255,.06)}.timeline span{display:block;color:#87f0ff;font-size:12px;text-transform:uppercase;letter-spacing:.16em;font-weight:900}.timeline strong{display:block;margin:10px 0 8px;font-size:20px}.timeline p{margin:0;font-size:14px;line-height:1.55}.science-card{padding:34px;border-radius:38px;background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(229,249,255,.92));align-self:end}.science-kicker{display:inline-block;margin-bottom:18px;color:#096f92;text-transform:uppercase;letter-spacing:.16em;font-size:12px;font-weight:900}.science-card h3{font-size:34px;color:#061522}.science-card p{color:#536a7c;line-height:1.65}
.audience{background:linear-gradient(180deg,#fff,#f2fbff)}.audience-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.audience-card{padding:34px;border-radius:32px;min-height:220px;background:linear-gradient(180deg,#fff,rgba(236,250,255,.9))}.audience-card h3{font-size:30px}
.b2b{background:#fff}.b2b-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.b2b-card{overflow:hidden;border-radius:32px;background:#fff;border:1px solid var(--line);box-shadow:0 24px 80px rgba(0,45,80,.12);transition:transform .22s ease,box-shadow .22s ease}.b2b-card:hover{transform:translateY(-5px);box-shadow:0 38px 100px rgba(0,45,80,.18)}.b2b-card img{aspect-ratio:1.25/1;object-fit:cover;width:100%}.b2b-card h3{padding:24px 24px 0}.b2b-card p{padding:0 24px 26px}
.private-label{max-width:none;background:linear-gradient(135deg,#061525,#062b47 52%,#0f9abf);color:#fff;overflow:hidden}.private-label:before{content:"H₂";position:absolute;right:-5vw;top:2vw;font-size:38vw;line-height:.8;font-weight:950;color:rgba(255,255,255,.045);letter-spacing:-.12em}.private-label .eyebrow{color:#8ef3ff}.private-label p{color:rgba(232,250,255,.78)}.process-list{display:grid;gap:12px;margin-top:34px}.process-list div{display:grid;grid-template-columns:52px 1fr;column-gap:16px;padding:20px;border:1px solid rgba(255,255,255,.12);border-radius:24px;background:rgba(255,255,255,.07);backdrop-filter:blur(18px)}.process-list span{grid-row:1/3;display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:50%;background:#8ef3ff;color:#042139;font-weight:950}.process-list strong{font-size:19px}.process-list p{grid-column:2;margin:6px 0 0;font-size:15px}.configurator{padding:30px;border-radius:36px;background:rgba(255,255,255,.94);color:#071522}.configurator h3{font-size:34px}.configurator label,.contact-form label{display:grid;gap:8px;margin-top:14px;color:#274255;font-weight:800;font-size:14px}.configurator input,.configurator select,.configurator textarea,.contact-form input,.contact-form select,.contact-form textarea{width:100%;border:1px solid rgba(6,35,61,.15);border-radius:17px;background:#fff;padding:14px 15px;color:#071522;outline:0;transition:border-color .2s ease,box-shadow .2s ease}.configurator input:focus,.configurator select:focus,.configurator textarea:focus,.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{border-color:#0aa9d2;box-shadow:0 0 0 4px rgba(10,169,210,.13)}.configurator .btn{width:100%;margin-top:18px;border:0}.configurator output{font-size:28px;font-weight:950;color:#0d8eb2}
.gallery{background:#eefaff}.gallery-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.gallery-item{position:relative;min-height:360px;padding:0;border:0;border-radius:34px;overflow:hidden;background:#06233d;box-shadow:0 24px 80px rgba(0,45,80,.12);text-align:left}.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease,filter .45s ease}.gallery-item:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 20%,rgba(2,12,25,.75))}.gallery-item span{position:absolute;left:22px;right:22px;bottom:22px;z-index:2;color:#fff;font-size:24px;font-weight:950;letter-spacing:-.04em}.gallery-item:hover img{transform:scale(1.06);filter:saturate(1.1)}
.proof{background:#fff}.proof-inner{max-width:var(--max);margin:auto;padding:clamp(34px,5vw,72px);border-radius:48px;background:radial-gradient(circle at 85% 20%,rgba(109,235,255,.28),transparent 26%),linear-gradient(180deg,#f8fdff,#fff);box-shadow:var(--shadow);border:1px solid var(--line)}.proof-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.proof-points span{padding:12px 16px;border-radius:999px;background:#06233d;color:#fff;font-weight:800;font-size:13px}
.faq{background:#fff}.faq-list{max-width:980px;margin:auto;display:grid;gap:12px}details{border-radius:24px;padding:0;overflow:hidden}summary{list-style:none;cursor:pointer;padding:22px 26px;font-weight:950;font-size:20px}summary::-webkit-details-marker{display:none}summary:after{content:"+";float:right;color:#0d9ec7}details[open] summary:after{content:"–"}details p{padding:0 26px 24px}
.contact{background:linear-gradient(180deg,#f4fbff,#fff)}.contact-lines{display:grid;gap:10px;margin-top:26px}.contact-lines a,.contact-lines span{display:inline-flex;width:max-content;max-width:100%;padding:13px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);box-shadow:0 14px 42px rgba(0,45,80,.08);font-weight:850}.contact-form-wrap{padding:30px;border-radius:36px;background:#fff}.contact-form .btn{width:100%;margin-top:18px;border:0}.form-message{margin-bottom:16px;padding:15px 16px;border-radius:16px;font-weight:850}.form-message.success{background:#e8fff7;color:#006747}.form-message.error{background:#fff0f0;color:#9b1c1c}
.site-footer{display:grid;grid-template-columns:1fr auto 1fr;gap:18px;align-items:center;padding:34px clamp(22px,5vw,92px);background:#061525;color:rgba(235,250,255,.72)}.site-footer strong{display:block;color:#fff}.site-footer span{display:block;margin-top:4px}.site-footer p{margin:0;text-align:right;font-size:13px}.footer-links{display:flex;gap:8px;flex-wrap:wrap}.footer-links a{padding:10px 12px;border-radius:999px;background:rgba(255,255,255,.08);color:#fff;font-weight:800;font-size:13px}
.lightbox{position:fixed;inset:0;z-index:2000;display:grid;place-items:center;padding:40px;background:rgba(2,9,22,.9);backdrop-filter:blur(12px)}.lightbox[hidden]{display:none}.lightbox img{max-width:min(1100px,92vw);max-height:82vh;border-radius:24px;box-shadow:var(--shadow-dark)}.lightbox button{position:absolute;right:28px;top:24px;width:52px;height:52px;border-radius:50%;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.1);color:#fff;font-size:32px;line-height:1}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}.reveal.is-visible{opacity:1;transform:none}.delay-1{transition-delay:.15s}
@keyframes heroZoom{from{transform:scale(1.04)}to{transform:scale(1.12)}}@keyframes orbit{to{transform:rotate(360deg)}}
@media (max-width:1200px){.reason-grid,.b2b-grid,.gallery-grid{grid-template-columns:repeat(2,1fr)}.hero{grid-template-columns:1fr}.hero-card{max-width:620px;margin:20px 0 60px}.technology{grid-template-columns:1fr}.timeline{grid-template-columns:1fr 1fr 1fr}.site-footer{grid-template-columns:1fr}.site-footer p{text-align:left}}
@media (max-width:860px){:root{--header-h:74px}.site-header{inset:10px 10px auto 10px;border-radius:28px;padding:10px}.brand img{width:190px}.nav-toggle{display:flex}.main-nav{position:fixed;left:10px;right:10px;top:86px;display:grid;gap:4px;padding:14px;border-radius:24px;background:rgba(255,255,255,.96);box-shadow:0 25px 90px rgba(0,35,70,.2);transform:translateY(-14px);opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease}.main-nav.is-open{transform:none;opacity:1;pointer-events:auto}.main-nav a{padding:15px}.nav-cta{text-align:center}.hero{padding:126px 20px 70px;min-height:auto}.hero h1{font-size:clamp(52px,18vw,84px)}.hero-lead{font-size:18px}.hero-metrics{display:grid;grid-template-columns:1fr}.hero-orbit{display:none}.wide-grid{grid-template-columns:1fr}.split,.product-section,.private-label,.contact{grid-template-columns:1fr}.timeline,.audience-grid{grid-template-columns:1fr}.reason-grid,.b2b-grid,.gallery-grid{grid-template-columns:1fr}.gallery-item{min-height:300px}.section{padding:74px 20px}.section-copy h2,.product-copy h2,.label-copy h2,.contact-copy h2,.section-heading h2,.tech-panel h2,.proof h2{font-size:clamp(38px,12vw,56px)}.tech-panel{padding:28px}.science-card h3{font-size:28px}.site-footer{padding:28px 20px}.hero-actions .btn{width:100%}}
@media (max-width:520px){.hero-card{padding:22px;border-radius:26px}.hero-metrics div{min-width:0}.process-list div{grid-template-columns:44px 1fr}.process-list span{width:44px;height:44px}.configurator,.contact-form-wrap{padding:22px;border-radius:28px}.proof-inner{border-radius:32px}.scroll-indicator{display:none}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}.hero-bg{transform:none}}