html,body,#root{margin:0;min-height:100%}body{background:#0A1118}

.os{--ink:#E6F1F5;--night:#070D13;--paper:#0A1118;--brass:#4FD8F0;--sage:#7FA3A0;--line:#1B2B38;--card:#0F1A23;--hd:ui-monospace,"SF Mono",Menlo,Consolas,monospace}
.os *{box-sizing:border-box}
.os{margin:0;background:var(--paper);color:var(--ink);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.os a{color:inherit}
.os .wrap{max-width:1100px;margin:0 auto;padding:0 24px}
.os header{padding:28px 0}.os header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.os .logo{display:flex;align-items:center;gap:12px;font:400 30px system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;letter-spacing:.3em;text-transform:uppercase;font-size:22px;font-weight:600;text-decoration:none}
.os .mk{width:26px;height:26px;border:3px solid var(--ink);border-radius:50%;position:relative;flex:none}.os .mk b{position:absolute;width:8px;height:8px;border-radius:50%;background:var(--brass);right:-4px;top:-3px}
.os nav{display:flex;gap:28px;font-size:15px}.os nav a{text-decoration:none;opacity:.8}.os nav a:hover{opacity:1}
.os .btn{display:inline-block;background:transparent;color:var(--brass);border:1px solid var(--brass);padding:13px 26px;border-radius:8px;box-shadow:0 0 24px rgba(79,216,240,.18);text-decoration:none;font-size:16px}
.os .hero{padding:48px 0 56px}.os .hero .wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.os h1{font:600 clamp(44px,7vw,76px)/1.04 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;margin:0 0 22px;letter-spacing:-.02em}
.os .sub{font-size:20px;max-width:34em;opacity:.85;margin:0 0 30px}
.os .orb{aspect-ratio:1;border-radius:20px;border:1px solid var(--line);background:var(--night);position:relative;overflow:hidden}
.os .orb i{position:absolute;inset:26%;border-radius:50%;border:2px solid var(--brass);box-shadow:0 0 90px rgba(79,216,240,.45),inset 0 0 40px rgba(79,216,240,.2)}
.os .orb b{position:absolute;inset:36%;border-radius:50%;background:radial-gradient(circle at 35% 30%,#E6FBFF,#4FD8F0 55%,#0B3A47)}
.os section{padding:56px 0}.os h2{font:600 clamp(30px,4vw,42px)/1.15 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;margin:0 0 28px}
.os .cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.os .card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px}.os .card h3{font:400 26px system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;margin:0 0 8px}.os .card p{margin:0;opacity:.8;font-size:16px}
.os .n{font-family:var(--hd);font-size:13px;letter-spacing:.2em;color:var(--brass);margin-bottom:10px}
.os .two{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.os ul{padding-left:20px;margin:0}.os li{margin:0 0 8px}
.os .note{background:var(--card);border:1px dashed var(--brass);border-radius:14px;padding:16px 18px;font-size:15px}
.os footer{border-top:1px solid var(--line);padding:28px 0;font-size:14px;opacity:.75}
@media(max-width:760px){.os .hero .wrap,.os .cards,.os .two{grid-template-columns:1fr}.os .orb{max-width:340px}.os nav{gap:18px}}
.os{min-height:100vh}.os .two{grid-template-columns:1fr}