:root{
  --bg:#FFFFFF;--surface:#F8FAFC;--text:#0F172A;--muted:#64748B;
  --primary:#2563EB;--primary-text:#FFFFFF;--accent:#06B6D4;
  --border:#E2E8F0;--radius:12px;--shadow:0 25px 50px -12px rgba(0, 0, 0, 0.08);
  --heading:'Space Grotesk',ui-sans-serif,system-ui,sans-serif;
  --body:'Inter',ui-sans-serif,system-ui,sans-serif;
}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{font-family:var(--body);color:var(--text);background:var(--bg);line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:var(--heading);color:var(--text);line-height:1.15;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,5vw,4rem);font-weight:700}
h2{font-size:clamp(1.7rem,3.2vw,2.4rem);font-weight:650}
h3{font-size:1.15rem;font-weight:600}
p{margin:0 0 1rem;color:var(--muted)}
a{color:inherit;text-decoration:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
section{padding:96px 0}
.eyebrow{display:inline-block;font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--primary);font-weight:600;margin-bottom:14px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 22px;border-radius:calc(var(--radius) - 2px);font-weight:600;font-family:var(--body);cursor:pointer;border:0;transition:transform .15s ease,box-shadow .2s ease,background .2s ease;font-size:.95rem}
.btn.primary{background:var(--primary);color:var(--primary-text);box-shadow:var(--shadow)}
.btn.primary:hover{transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn.ghost:hover{background:var(--surface)}

.nav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(150%) blur(14px);background:color-mix(in oklab,var(--bg) 82%, transparent);border-bottom:1px solid var(--border)}
.nav .inner{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:1180px;margin:0 auto}
.nav .brand{font-family:var(--heading);font-weight:700;font-size:1.15rem;letter-spacing:-.01em}
.nav ul{display:flex;gap:28px;list-style:none;margin:0;padding:0}
.nav ul a{color:var(--muted);font-size:.94rem}
.nav ul a:hover{color:var(--text)}
@media(max-width:720px){.nav ul{display:none}}

.hero{padding:120px 0 96px;position:relative;overflow:hidden}
.hero .grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
@media(max-width:900px){.hero .grid{grid-template-columns:1fr;gap:40px}}
.hero .sub{font-size:1.15rem;max-width:56ch;margin-bottom:28px}
.hero .visual{aspect-ratio:5/4;border-radius:calc(var(--radius) + 8px);background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:var(--shadow);display:grid;place-items:center;color:var(--primary-text);position:relative;overflow:hidden}
.hero .visual::after{content:"";position:absolute;inset:0;background:radial-gradient(60% 50% at 20% 10%,rgba(255,255,255,.28),transparent 60%)}
.hero .actions{display:flex;gap:12px;flex-wrap:wrap}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.cards{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.card .ico{width:44px;height:44px;border-radius:12px;background:color-mix(in oklab,var(--primary) 12%,transparent);display:grid;place-items:center;color:var(--primary);margin-bottom:14px}

.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
@media(max-width:900px){.about-grid{grid-template-columns:1fr}}
.about ul{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:12px}
.about li{display:flex;gap:10px;align-items:flex-start;color:var(--text)}
.about li::before{content:"";width:8px;height:8px;border-radius:99px;background:var(--primary);margin-top:9px;flex:0 0 auto}

.tests{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:900px){.tests{grid-template-columns:1fr}}
.test{padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.test blockquote{margin:0 0 14px;color:var(--text);font-size:1.02rem}
.test .who{color:var(--muted);font-size:.9rem}

.faq details{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 20px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600;color:var(--text);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details[open] summary{color:var(--primary)}
.faq p{margin-top:10px}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px}
@media(max-width:900px){.contact-grid{grid-template-columns:1fr}}
.contact-form{display:grid;gap:14px}
.contact-form label{display:grid;gap:6px;font-size:.86rem;color:var(--muted);font-weight:500}
.contact-form input,.contact-form textarea{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px 14px;outline:none;transition:border-color .15s}
.contact-form input:focus,.contact-form textarea:focus{border-color:var(--primary)}
.contact-form button{background:var(--primary);color:var(--primary-text);border:0;padding:14px;border-radius:12px;font-weight:600;cursor:pointer}

footer{padding:48px 0;border-top:1px solid var(--border);color:var(--muted);font-size:.9rem}
footer .row{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}