/* Deep Root Systems — design system v2 (static, no build) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;600;700&display=swap');

:root{
  --bg:#04070c; --bg2:#0a121c; --panel:rgba(255,255,255,.035);
  --fg:#eaf1f8; --muted:#92a6ba; --muted2:#62788f;
  --accent:#3ddc97; --accent2:#2ea3ff; --accent3:#7b6cff;
  --line:rgba(61,220,151,.18); --line2:rgba(255,255,255,.08);
  --grad:linear-gradient(120deg,var(--accent),var(--accent2));
  --grad3:linear-gradient(120deg,var(--accent),var(--accent2) 55%,var(--accent3));
  --radius:18px; --maxw:1200px;
  --shadow:0 24px 60px -28px rgba(0,0,0,.7);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  background:var(--bg); color:var(--fg); line-height:1.7; -webkit-font-smoothing:antialiased;
  overflow-x:hidden; letter-spacing:.1px;
}
h1,h2,h3,.brand{font-family:"Space Grotesk","Inter",sans-serif}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.narrow{max-width:920px}
section{position:relative}

/* ---------- background ---------- */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.bg::before{
  content:"";position:absolute;inset:-30%;
  background:
    radial-gradient(36% 44% at 16% 8%, rgba(46,163,255,.16), transparent 60%),
    radial-gradient(40% 50% at 88% 14%, rgba(61,220,151,.14), transparent 60%),
    radial-gradient(50% 40% at 50% 108%, rgba(123,108,255,.10), transparent 60%);
}
.bg::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(var(--line2) 1px,transparent 1px),linear-gradient(90deg,var(--line2) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(circle at 50% 22%, #000, transparent 72%);
}

/* ---------- header / nav ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);
  background:rgba(4,7,12,.7);border-bottom:1px solid var(--line2)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{font-weight:700;letter-spacing:-.01em;font-size:20px;white-space:nowrap}
.brand b{font-weight:700;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.menu{display:flex;align-items:center;gap:28px}
.menu a.link{color:var(--muted);font-size:14.5px;font-weight:500;transition:.2s;position:relative}
.menu a.link:hover,.menu a.link.active{color:var(--fg)}
.menu a.link.active::after{content:"";position:absolute;left:0;right:0;bottom:-23px;height:2px;background:var(--grad);border-radius:2px}
.nav-right{display:flex;align-items:center;gap:12px}

.lang{display:flex;gap:3px;background:rgba(255,255,255,.05);border:1px solid var(--line2);border-radius:999px;padding:3px}
.lang button{all:unset;cursor:pointer;font-size:12px;font-weight:700;color:var(--muted);padding:5px 11px;border-radius:999px;transition:.2s}
.lang button.on{background:var(--grad);color:#04070c}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:14.5px;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:.22s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#04070c;box-shadow:0 10px 30px -10px rgba(61,220,151,.6)}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-2px);box-shadow:0 16px 38px -12px rgba(61,220,151,.7)}
.btn-ghost{border-color:var(--line);color:var(--fg);background:rgba(61,220,151,.05)}
.btn-ghost:hover{background:rgba(61,220,151,.12);transform:translateY(-2px)}
.btn-sm{padding:9px 17px;font-size:13.5px}

.burger{display:none;all:unset;cursor:pointer;color:var(--fg);font-size:22px;line-height:1}

/* ---------- hero ---------- */
.hero{padding:16vh 0 11vh;text-align:center;overflow:hidden}
.hero .roots{position:absolute;left:50%;bottom:-2px;transform:translateX(-50%);width:min(1300px,150vw);z-index:-1;opacity:.5;pointer-events:none}
.hero .roots path{fill:none;stroke:url(#rg);stroke-width:1.3;stroke-linecap:round;
  stroke-dasharray:1600;stroke-dashoffset:1600;animation:grow 3s ease forwards}
.hero .roots path:nth-child(2){animation-delay:.2s}.hero .roots path:nth-child(3){animation-delay:.4s}
.hero .roots path:nth-child(4){animation-delay:.6s}.hero .roots path:nth-child(5){animation-delay:.8s}
@keyframes grow{to{stroke-dashoffset:0}}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent);border:1px solid var(--line);border-radius:999px;padding:7px 16px;background:rgba(61,220,151,.06)}
.eyebrow .pulse{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 rgba(61,220,151,.6);animation:pulse 2.2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(61,220,151,.5)}70%{box-shadow:0 0 0 11px rgba(61,220,151,0)}100%{box-shadow:0 0 0 0 rgba(61,220,151,0)}}
.hero h1{font-size:clamp(40px,7.2vw,82px);font-weight:700;letter-spacing:-.03em;line-height:1.04;margin:28px auto 0;max-width:18ch}
.hero p.lead{color:var(--muted);font-size:clamp(17px,2.3vw,22px);max-width:680px;margin:22px auto 0}
.hero .cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:38px}
.hero .chips{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:40px}
.chip{font-size:13px;color:var(--muted);border:1px solid var(--line2);border-radius:999px;padding:8px 15px;background:var(--panel)}
.chip b{color:var(--fg);font-weight:600}

/* ---------- sections ---------- */
.block{padding:11vh 0;border-top:1px solid var(--line2)}
.block.tight{padding:7vh 0}
.block.plain{border-top:none}
.head{max-width:720px;margin:0 auto 52px;text-align:center}
.head .eyebrow{margin-bottom:18px}
.head h2{font-size:clamp(28px,4.6vw,46px);font-weight:700;letter-spacing:-.02em;line-height:1.1}
.head p{color:var(--muted);margin-top:14px;font-size:17px}

/* cards grid */
.grid{display:grid;gap:20px}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{position:relative;background:var(--panel);border:1px solid var(--line2);border-radius:var(--radius);
  padding:28px;transition:.25s;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;opacity:0;transition:.25s;
  background:var(--grad3);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude}
.card:hover{transform:translateY(-4px);background:rgba(255,255,255,.05);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}
.card .ic{width:48px;height:48px;border-radius:13px;display:grid;place-items:center;font-size:22px;
  background:linear-gradient(135deg,rgba(61,220,151,.18),rgba(46,163,255,.14));border:1px solid var(--line);margin-bottom:18px}
.card h3{font-size:19px;font-weight:600;margin-bottom:9px;letter-spacing:-.01em}
.card p{color:var(--muted);font-size:15px}
.card .more{display:inline-block;margin-top:16px;color:var(--accent);font-size:13.5px;font-weight:600}
.card.cta-card{display:grid;place-content:center;text-align:center;background:linear-gradient(135deg,rgba(61,220,151,.1),rgba(46,163,255,.08))}

/* process steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{background:var(--panel);border:1px solid var(--line2);border-radius:var(--radius);padding:26px;position:relative;transition:.25s}
.step:hover{transform:translateY(-3px);border-color:var(--line)}
.step::before{counter-increment:s;content:"0" counter(s);font-family:"Space Grotesk";font-weight:700;font-size:30px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.step h3{font-size:17px;margin:10px 0 7px}
.step p{color:var(--muted);font-size:14.5px}

/* principles / numbers band */
.band{background:linear-gradient(135deg,rgba(61,220,151,.08),rgba(46,163,255,.07));border:1px solid var(--line);
  border-radius:24px;padding:8px}
.band .inner{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;border-radius:18px;overflow:hidden}
.band .cell{padding:34px 26px;text-align:center;background:rgba(4,7,12,.35)}
.band .cell .big{font-family:"Space Grotesk";font-size:clamp(28px,4vw,40px);font-weight:700}
.band .cell p{color:var(--muted);font-size:14.5px;margin-top:6px}

/* tech badges */
.badges{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:820px;margin:0 auto}
.badges span{font-size:13.5px;color:var(--muted);border:1px solid var(--line2);border-radius:10px;padding:9px 15px;background:var(--panel);transition:.2s}
.badges span:hover{color:var(--fg);border-color:var(--line)}

/* CTA band */
.ctaband{margin:0 auto;max-width:var(--maxw);text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(61,220,151,.13),rgba(46,163,255,.12));
  border:1px solid var(--line);border-radius:28px;padding:64px 28px}
.ctaband h2{font-size:clamp(26px,4.2vw,40px);font-weight:700;letter-spacing:-.02em}
.ctaband p{color:var(--muted);margin:12px auto 28px;max-width:560px;font-size:16.5px}

/* prose / inner pages */
.prose{max-width:880px;margin:0 auto}
.prose h2{font-size:clamp(24px,4vw,36px);margin:0 0 12px}
.prose .muted{color:var(--muted);font-size:16.5px}
.contact-row{display:flex;gap:16px;flex-wrap:wrap;margin-top:30px}
.contact-row a{display:inline-flex;align-items:center;gap:13px;border:1px solid var(--line2);
  border-radius:16px;padding:18px 22px;transition:.22s;min-width:260px;background:var(--panel)}
.contact-row a:hover{border-color:var(--line);transform:translateY(-2px);background:rgba(255,255,255,.05)}
.contact-row .ic{font-size:24px}
.contact-row b{display:block;font-size:15.5px}
.contact-row span{color:var(--muted);font-size:13.5px}
.note{margin-top:26px;font-size:13.5px;color:var(--muted);border-left:2px solid var(--line);padding-left:14px}
.soon{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);
  border:1px solid var(--line);border-radius:999px;padding:3px 10px;margin-left:8px;vertical-align:middle}

/* ---------- footer ---------- */
footer.ft{border-top:1px solid var(--line2);margin-top:2vh;padding:56px 0 40px}
.ft .wrap{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.ft .brand{font-size:19px}
.ft p{color:var(--muted);font-size:14px;max-width:300px;margin-top:12px}
.ft nav{display:flex;gap:24px;flex-wrap:wrap}
.ft nav a{color:var(--muted);font-size:14.5px;transition:.2s}
.ft nav a:hover{color:var(--fg)}
.ft .copy{width:100%;color:var(--muted);font-size:12.5px;border-top:1px solid var(--line2);margin-top:30px;padding-top:22px}

/* i18n visibility */
[data-ua]{display:none}
html[lang="uk"] [data-en]{display:none}
html[lang="uk"] [data-ua]{display:inline}

/* responsive */
@media(max-width:980px){
  .grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .grid.cols-3,.steps{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .menu{position:fixed;inset:68px 0 auto 0;flex-direction:column;align-items:flex-start;gap:0;
    background:rgba(4,7,12,.98);border-bottom:1px solid var(--line2);padding:8px 28px 20px;display:none}
  .menu.open{display:flex}
  .menu a.link{padding:13px 0;width:100%;border-bottom:1px solid var(--line2)}
  .menu a.link.active::after{display:none}
  .burger{display:block}
  .grid.cols-4,.grid.cols-3,.grid.cols-2,.steps,.band .inner{grid-template-columns:1fr}
  .nav-right .btn{display:none}
  .hero{padding:12vh 0 8vh}
}