/* RESET */

*{
margin:0;
padding:0;
box-sizing:border-box;
}

/* MOBILE FIRST */

body{

font-family: Arial, Helvetica, sans-serif;
background:#000;
color:#fff;
line-height:1.6;
padding:15px;

}

/* HEADER */

header{
margin-bottom:20px;
}

.voltar{
width:40px;
height:auto;
}

/* CONTEÚDO */

main{

background:#111;
padding:20px;
border-radius:8px;
max-width:900px;
margin:auto;

}

h1{
font-size:1.4rem;
margin-bottom:15px;
}

h1 a{

text-decoration:none;
color:#4da3ff;

}

h2{
margin-top:20px;
margin-bottom:10px;
font-size:1.2rem;
}

p{
margin-bottom:12px;
}

/* IMAGEM NORMAL */

main img{

max-width:100%;
height:auto;
border-radius:6px;
margin:15px 0;

}

/* GALERIA */

.galeria{

display:grid;
grid-template-columns:1fr;
gap:10px;
padding:10px;

}

.galeria img{

width:100%;
height:auto;
border-radius:8px;
border:2px solid #222;
transition:0.3s;

}

.galeria img:hover{

transform:scale(1.03);
border:2px solid #fff;

}

/* TABLET */

@media (min-width:600px){

.galeria{

grid-template-columns:repeat(2,1fr);

}

}

/* DESKTOP */

@media (min-width:768px){

body{
padding:30px;
}

main{
padding:35px;
}

h1{
font-size:1.8rem;
}

}

@media (min-width:900px){

.galeria{

grid-template-columns:repeat(4,1fr);

}

}