.book-header {
    background-color: #262e3e;
}

.book .book-summary .book-logo img {
    width:100%;
}
#book-search-input {
    display: none;
}
.book .book-summary {
    background-color: #121921;
}
.book-summary ul.summary li a:hover {
    background-image: linear-gradient(45deg,rgba(23,119,197,.4),rgba(19,58,134,.4));
    text-decoration: none;
}
.book-summary ul.summary .articles li.active {
    background-image: linear-gradient(45deg,#1777c5,#133a86);
}
.book-summary ul.summary>li.active>a {
    color: #fff;
    background-image: linear-gradient(45deg,#1777c5,#133a86);
}
.book-summary ul.summary li.active>a {
    color: #fff;
}
.book-summary ul.summary li a, .book-summary ul.summary li span {
    color: rgb(192, 196, 204);
}