body {
    padding: 20px;
    background-color: #FAFAFA;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: royalblue;
}

img {
    max-width: 100%;
}

ul {
    list-style: none;
    padding-left: 0px;
}

    ul li::before {
        content: '\2713\0020';
    }

.shadow-etc {
    min-width: 400px;
    background-color: white;
    text-align: center;
    padding: 30px 50px;
}

.big {
    color: royalblue;
    font-size: x-large;
}

.livros img {
    width: 30%;
}