:root{
  --bg:#0a0a0a;
  --bg-soft:#0f0f10;
  --ink:#ffffff;
  --muted:#9ca3af;
  --line:#27272a;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,sans-serif;line-height:1.5}
a{color:inherit}
.nav{position:fixed;top:0;left:0;width:100%;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:16px 28px;background:rgba(0,0,0,.75);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand h1{font-size:20px;margin:0;font-weight:800}
.brand p{margin:2px 0 0 0;color:var(--muted);font-size:12px}
.menu{display:none;gap:24px}
.menu a{color:#b3b3b3;text-decoration:none;font-size:14px}
.menu a:hover{color:#fff}
.cta{display:none;border:1px solid #fff;border-radius:9999px;padding:8px 16px;text-decoration:none;font-size:14px;transition:all .2s}
.cta:hover{background:#fff;color:#000}
@media(min-width:900px){
  .menu{display:flex}
  .cta{display:inline-flex;align-items:center}
}
.hero{position:relative;min-height:100vh;padding:0 24px;margin-top:64px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;overflow:hidden}
.hero h2{font-size:40px;max-width:900px;margin:0 0 16px 0;font-weight:800;letter-spacing:-.02em}
.hero p{color:var(--muted);max-width:760px;margin:0 auto 28px}
.hero .btn{background:#fff;color:#000;padding:12px 22px;border-radius:9999px;text-decoration:none;font-weight:700;transition:transform .2s,background .2s}
.hero .btn:hover{transform:scale(1.05);background:#e5e7eb}
.hero-bg{position:absolute;inset:-20%;z-index:-1;background:radial-gradient(60% 60% at 50% 40%, rgba(99,102,241,.18), transparent 60%), radial-gradient(40% 40% at 70% 60%, rgba(56,189,248,.15), transparent 65%);filter:blur(50px);animation:float 12s ease-in-out infinite alternate}
@keyframes float{0%{transform:translateY(-10px)}100%{transform:translateY(10px)}}
.section{padding:96px 24px}
.section h3{text-align:center;margin:0 0 32px 0;font-size:32px;font-weight:800;letter-spacing:-.02em}
.section-dark{background:#0f0f10}
.grid{display:grid;gap:20px;max-width:1200px;margin:0 auto}
.grid.three{grid-template-columns:repeat(1,minmax(0,1fr))}
@media(min-width:800px){.grid{grid-template-columns:repeat(4,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{border:1px solid var(--line);background:#121214;border-radius:16px;padding:24px;transition:transform .2s,background .2s}
.card:hover{transform:translateY(-4px);background:#17171a}
.card.soft{background:#141416}
.maxw{max-width:820px;margin:0 auto}
.form{max-width:560px;margin:20px auto 0;display:grid;gap:12px}
.form input,.form textarea{background:#0a0a0a;border:1px solid #3f3f46;border-radius:12px;padding:12px 14px;color:#fff;font-size:14px;outline:none}
.form input:focus,.form textarea:focus{border-color:#fff}
.btn{display:inline-block;background:#fff;color:#000;border-radius:9999px;padding:12px 20px;text-decoration:none;font-weight:700}
.footer{border-top:1px solid var(--line);color:#9ca3af;text-align:center;padding:28px 16px}
/* reveal */
.fade-in{opacity:0;transform:translateY(18px);transition:opacity .7s, transform .7s}
.fade-in.visible{opacity:1;transform:translateY(0)}