:root{--bg:#0b1a4d;--card:#132a6e;--txt:#e6ecff;--mut:#9fb0e0;--acc:#ffd740;--lnk:#6fd3ff}
*{box-sizing:border-box}
body{margin:0;background:linear-gradient(180deg,#1a47a8,#0b1a4d 420px) no-repeat,#0b1a4d;color:var(--txt);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:760px;margin:0 auto;padding:28px 16px 48px}
nav{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:24px}
nav a{color:#fff;font-weight:700;text-decoration:none;opacity:.85}
nav a:hover{opacity:1}
h1{font-size:40px;line-height:1.1;margin:0 0 6px}
h1 span{color:var(--acc)}
h2{margin-top:32px;color:var(--acc)}
h3{margin:22px 0 4px}
.sub{color:var(--mut);margin-top:0}
.card{background:var(--card);border:2px solid rgba(255,255,255,.18);border-radius:18px;padding:18px 20px;margin:22px 0}
a{color:var(--lnk)}
ul{padding-left:20px}
footer{margin-top:40px;color:var(--mut);font-size:14px}