body{
    margin:0;
    font-family:Arial, sans-serif;
    background:#071018;
    color:#f2f5f7;
    line-height:1.6;
}
header{
    background:linear-gradient(90deg,#0b1f33,#102d48);
    padding:20px;
    position:sticky;
    top:0;
}
nav{
    display:flex;
    gap:18px;
    flex-wrap:wrap;
}
nav a{
    color:#8fd3ff;
    text-decoration:none;
    font-weight:bold;
}
.hero{
    padding:80px 40px;
    text-align:center;
}
.hero h1{
    font-size:3rem;
}
.section{
    padding:50px 40px;
}
.card-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:20px;
}
.card{
    background:#112535;
    border-radius:16px;
    padding:24px;
    box-shadow:0 8px 18px rgba(0,0,0,0.25);
}
footer{
    background:#09131c;
    padding:30px;
    text-align:center;
    color:#9fb6c6;
}
.button{
    display:inline-block;
    padding:12px 22px;
    border-radius:10px;
    background:#1f6feb;
    color:white;
    text-decoration:none;
    margin-top:20px;
}