body{
font-family:Arial;
margin:0;
background:#f2f2f2;
}

header{
background:#0b3d91;
color:white;
text-align:center;
padding:20px;
}

nav{
background:#222;
padding:10px;
text-align:center;
}

nav a{
color:white;
margin:10px;
text-decoration:none;
}

section{
padding:30px;
max-width:900px;
margin:auto;
}

.hero{
text-align:center;
}

.hero img{
width:250px;
border-radius:10px;
}

.gallery{
display:flex;
gap:20px;
flex-wrap:wrap;
justify-content:center;
}

.gallery img{
width:250px;
border-radius:10px;
transition:0.3s;
}

.gallery img:hover{
transform:scale(1.1);
}

.dark{
background:#111;
color:white;
}

@media(max-width:700px){

.gallery img{
width:90%;
}

.hero img{
width:70%;
}

}