:root{--bg:#050505;--surface:#101010;--card:#151515;--muted:#b9b9b9;--text:#f3f3f3;--red:#7b1113;--red2:#b91c1c;--line:rgba(255,255,255,.12);--max:1240px;--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 20% 0%,rgba(123,17,19,.35),transparent 30%),linear-gradient(180deg,#030303,#0b0b0b);font-family:Inter,Arial,sans-serif;color:var(--text);line-height:1.6}a{text-decoration:none;color:inherit}.container{width:min(var(--max),calc(100% - 40px));margin:auto}.site-header{position:sticky;top:0;z-index:10;background:rgba(0,0,0,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav-wrap{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-weight:900}.brand-mark{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,var(--red),#111);border:1px solid rgba(255,255,255,.2);display:grid;place-items:center}.site-nav{display:flex;gap:18px;flex-wrap:wrap}.site-nav a{color:var(--muted);font-size:14px}.site-nav a:hover,.site-nav a.active{color:#fff}.menu-toggle{display:none;background:#111;color:#fff;border:1px solid var(--line);border-radius:12px;padding:9px 12px}.hero{padding:92px 0 56px}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center}.eyebrow{margin:0 0 12px;color:#ffb4b4;text-transform:uppercase;letter-spacing:.12em;font-weight:900;font-size:12px}h1{font-size:clamp(2.8rem,6vw,5.6rem);line-height:.98;margin:0}h2{font-size:clamp(2rem,3vw,3.5rem);line-height:1.05;margin:0 0 12px}h3,h4{margin:0 0 10px}.hero-text,.section-head p,p{color:var(--muted)}.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}.btn{display:inline-flex;padding:13px 20px;border-radius:999px;font-weight:800}.btn-primary{background:linear-gradient(135deg,var(--red2),var(--red));color:white}.btn-secondary{border:1px solid var(--line);background:rgba(255,255,255,.04)}.hero-panel,.contact-card{background:linear-gradient(180deg,rgba(123,17,19,.25),rgba(255,255,255,.04));border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 24px 70px rgba(0,0,0,.45)}.hero-panel ul{padding-left:20px;color:var(--muted)}.section{padding:82px 0}.alt{background:rgba(255,255,255,.025);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.dark{background:#030303}.section-head{max-width:860px;margin-bottom:28px}.button-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.node-btn{border:1px solid rgba(185,28,28,.45);background:linear-gradient(180deg,rgba(123,17,19,.35),rgba(255,255,255,.035));border-radius:16px;padding:14px;font-weight:800;font-size:13px;color:#fff;min-height:58px;display:flex;align-items:center}.node-btn:hover{transform:translateY(-2px);background:rgba(185,28,28,.35)}.layers{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.layers article,.class-card,.leaf{background:rgba(255,255,255,.055);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.layers span,.class-top span{color:#ffb4b4;font-weight:900}.domain-section{padding:86px 0;border-top:1px solid var(--line)}.class-grid{display:grid;gap:22px}.class-top{display:flex;align-items:center;gap:14px}.class-top h3{font-size:1.55rem}.leaf-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.leaf{border-radius:18px;background:rgba(123,17,19,.12)}footer{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:14px}@media(max-width:900px){.hero-grid,.layers,.leaf-grid{grid-template-columns:1fr}.button-grid{grid-template-columns:repeat(2,1fr)}.site-nav{display:none;width:100%;padding-bottom:18px}.site-nav.open{display:flex}.nav-wrap{flex-wrap:wrap}.menu-toggle{display:block}}@media(max-width:560px){.button-grid{grid-template-columns:1fr}.container{width:min(100% - 24px,var(--max))}}