body { 
    background: rgb(155, 241, 241);
    margin: 0px
     font-family: "Libertinus Sans", sans-serif;
     margin-bottom : 100px;

}

 header {     
    border: solid 2px black;
    padding: 20;
font-size: 32px; sans-serif;
 }
.chamada {
    background:  rgb(23, 101, 190);
    padding-bottom: 80px;
    padding-top: 80px;
    display:flex;
    justify-content: center;
 }

.chamada-texto {
    margin-right: 20px;
}
 
h1 {
    font-size: 30zpx;
}

p {
    font-size: 20px;
}
 
img {
    height: 200px ;
}
.categoria-videos {
    display:flex;
    gap: 20px;

}
.categoria {
    padding-left: 20px;
    padding-right: 20px;
    margin-top : 50px
}
.categoria-videos img {
    opacity: 0.5;
}
.categoria-videos:hover {
    opacity: 1.0;
    border: 1px solid green; 
}
.categoria h2 {
    color; black ;
}