/* BASE */
body{
margin:0;
font-family:Arial, Helvetica, sans-serif;
background:#eef1f5;
}

.topbar{
color:white;
padding:14px;
font-size:20px;
font-weight:bold;
}

.container{
max-width:900px;
margin:auto;
}

/* BANNIERE */
.cover{
height:220px;
background-size:cover;
background-position:center;
}

/* PROFIL */

.profile{
background:white;
padding:20px;
text-align:center;
position:relative;
box-shadow:0 2px 8px rgba(0,0,0,0.1);
}

.avatar{
width:120px;
height:120px;
border-radius:50%;
border:4px solid white;
object-fit:cover;
margin-top:-70px;
}

/* POSTS */

.feed{
max-width:650px;
margin:30px auto;
}

.post{
background:white;
padding:20px;
margin-bottom:15px;
border-radius:8px;
box-shadow:0 2px 6px rgba(0,0,0,0.1);
}

.post span{
color:gray;
font-size:13px;
}

/* INSTAGRAM GRID */

.gallery{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:10px;
max-width:650px;
margin:30px auto;
}

.gallery img{
width:100%;
height:200px;
object-fit:cover;
}

/* COULEURS DES RÉSEAUX */

.facebook .topbar{
background:#1877f2;
}

.twitter .topbar{
background:#1da1f2;
}

.instagram .topbar{
background:linear-gradient(45deg,#f58529,#dd2a7b,#8134af);
}

.linkedin .topbar{
background:#0a66c2;
}

/* BANNIERES DIFFERENTES */

.facebook .cover{
background-image:url("images/banner.png");
}

.twitter .cover{
background-image:url("images/banner.png");
}

.instagram .cover{
background-image:url("images/banner.png");
}

.linkedin .cover{
background-image:url("images/banner.png");
}