.highlight{
background:#161b22;
padding:30px;
text-align:center;
border-radius:10px;
border:1px solid #30363d;
}

.highlight h1{
font-size:2.5rem;
color:#58a6ff;
}

footer{
background:#161b22;
text-align:center;
padding:40px;
margin-top:60px;
}

footer p{
color:#8b949e;
}

@media(max-width:768px){

header h1{
font-size:2rem;
}

nav a{
display:block;
margin:10px;
}

.card img{
height:180px;
}

}

.button{
display:inline-block;
margin:10px;
padding:12px 20px;
background:#0078d4;
color:white;
text-decoration:none;
border-radius:8px;
font-weight:bold;
}

.button:hover{
background:#005ea6;
}