body{

font-family:Arial;

margin:0;

padding:20px;

background:#f5f5f5;

}

header{

background:#111;

color:white;

padding:20px;

}

nav a{

color:white;

margin-right:20px;

text-decoration:none;

}

.hero{

text-align:center;

margin-top:80px;

}

.btn{

background:#000;

color:white;

padding:12px 20px;

text-decoration:none;

}

.product{

background:white;

padding:20px;

margin:20px;

border-radius:6px;

}