```css
*{
margin:0;
padding:0;
box-sizing:border-box;
font-family:Arial;
}

body{
background:#f5f5f5;
}

/* TOPBAR */

.topbar{
background:black;
color:white;
padding:15px 40px;
display:flex;
justify-content:flex-end;
gap:30px;
}

.topbar span{
cursor:pointer;
}

/* NAVBAR */

.navbar{
display:flex;
justify-content:space-between;
align-items:center;
padding:25px 40px;
background:white;
}

.logo{
font-size:30px;
font-weight:bold;
}

.navbar ul{
display:flex;
gap:30px;
list-style:none;
}

.navbar li{
cursor:pointer;
font-weight:bold;
}

/* HERO */

.hero{
height:90vh;
background:url("https://images.unsplash.com/photo-1517649763962-0c623066013b?w=1600");
background-size:cover;
background-position:center;
display:flex;
justify-content:center;
align-items:center;
position:relative;
}

.overlay{
position:absolute;
width:100%;
height:100%;
background:rgba(0,0,0,0.5);
}

.heroText{
position:relative;
z-index:2;
text-align:center;
color:white;
}

.heroText h1{
font-size:80px;
}

.heroText p{
font-size:22px;
margin:20px 0;
}

button{
padding:15px 30px;
border:none;
background:black;
color:white;
border-radius:10px;
cursor:pointer;
}

/* LOJA */

#loja{
display:none;
padding:50px;
}

.titulo{
font-size:40px;
margin-bottom:40px;
}

.grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
gap:30px;
}

.card{
background:white;
border-radius:20px;
overflow:hidden;
box-shadow:0 5px 20px rgba(0,0,0,0.1);
padding-bottom:20px;
}

.card img{
width:100%;
height:250px;
object-fit:cover;
}

.card h3{
padding:15px;
}

.card p{
padding:0 15px 15px;
font-weight:bold;
}

.card button{
margin-left:15px;
margin-top:10px;
}

/* MODAIS */

.modal{
display:none;
position:fixed;
top:0;
left:0;
width:100%;
height:100%;
background:rgba(0,0,0,0.7);
justify-content:center;
align-items:center;
z-index:999;
}

.box{
background:white;
padding:40px;
border-radius:20px;
width:350px;
display:flex;
flex-direction:column;
gap:15px;
position:relative;
}

.box input{
padding:12px;
border:1px solid #ccc;
border-radius:10px;
}

.fechar{
position:absolute;
top:15px;
right:20px;
cursor:pointer;
font-size:20px;
}

/* PRODUTO */

.paginaProduto{
display:none;
justify-content:center;
align-items:center;
padding:50px;
}

.produtoBox{
background:white;
padding:40px;
border-radius:20px;
display:flex;
gap:40px;
}

.produtoBox img{
width:400px;
border-radius:20px;
}

.produtoInfo{
display:flex;
flex-direction:column;
gap:20px;
}

.carrinho{
margin-top:50px;
background:white;
padding:30px;
border-radius:20px;
}
```