body{margin:0;font-family:Arial;background:#fff;color:#111}
a{text-decoration:none;color:#0ea5e9}
.header{position:sticky;top:0;background:#fff;border-bottom:1px solid #ddd;padding:1rem}
.nav{max-width:1100px;margin:auto;display:flex;justify-content:space-between;align-items:center}
.menu a{margin-left:1rem}
.hero{max-width:1100px;margin:auto;padding:4rem 1rem;display:grid;grid-template-columns:1.1fr .9fr;gap:2rem}
@media(max-width:900px){.hero{grid-template-columns:1fr}}
.section{max-width:1100px;margin:auto;padding:2rem 1rem}
.card{background:#f8fafc;padding:1rem;border-radius:.5rem;border:1px solid #e5e7eb}
.btn{background:#0ea5e9;color:#fff;padding:.7rem 1rem;border-radius:.5rem;display:inline-block;margin-right:.5rem}
.footer{text-align:center;padding:2rem 0;border-top:1px solid #eee;color:#555}