*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial, sans-serif;
}

body{
    background:#f4f4f4;
}

header{
    background:#0077cc;
    color:white;
    text-align:center;
    padding:30px;
}

.hero{
    text-align:center;
    padding:60px;
}

.btn{
    display:inline-block;
    margin-top:20px;
    padding:12px 25px;
    background:#0077cc;
    color:white;
    text-decoration:none;
    border-radius:5px;
}

.cards{
    display:flex;
    justify-content:center;
    gap:20px;
    padding:40px;
    flex-wrap:wrap;
}

.card{
    background:white;
    width:250px;
    padding:20px;
    border-radius:8px;
    box-shadow:0 0 10px rgba(0,0,0,.2);
    text-align:center;
}

footer{
    background:#222;
    color:white;
    text-align:center;
    padding:20px;
}