body {
    margin:0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background:#f8fafc;
    color:#1e293b;
    line-height:1.7;
}

header {
    background:linear-gradient(90deg,#0ea5e9,#22c55e);
    color:white;
    padding:60px 20px;
    text-align:center;
}

nav {
    background:#0f172a;
    padding:15px 20px;
    text-align:center;
}

nav a {
    color:#ffffff;
    margin:0 15px;
    text-decoration:none;
    font-weight:600;
}

.container {
    max-width:1100px;
    margin:60px auto;
    padding:0 20px;
}

.grid {
    display:grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap:30px;
}

.card {
    background:#ffffff;
    padding:30px;
    border-radius:10px;
    box-shadow:0 6px 18px rgba(0,0,0,0.08);
}

.highlight {
    background:#ecfeff;
    padding:30px;
    border-left:6px solid #0ea5e9;
    margin:40px 0;
}

footer {
    background:#0f172a;
    color:white;
    text-align:center;
    padding:40px 20px;
    margin-top:80px;
}