html {
    /* Stretch image on the whole page */
    min-height: 100%;
    position: absolute;
    background-image: url('depositphotos_3674237-stock-photo-books-shelf.jpg');
    width: 100%; 
    height: 100%;
    background-attachment: fixed;
}

body {
    /* Get rid of the indents */
    margin: 0;
    padding: 0;
}

.language-block {
    position: relative;
}

.language-sites {
    position: absolute;
    top: 5px;
    right: 10px;
    color:white;
    background-color: #000;
}

.language-russian {
    top: 30px;
}

.language-english {
    top: 30px;
}

hr {
    /* Prettify Line delimiter */
    width: 80%;
    margin-top: 20px;
    margin-bottom: -10px;
}

.books-images {
    /* One Size books image */
    width: 97px;
    height: 142px;
}

#library-title {
    /* Little shadow to tile */
    text-shadow: 5px 5px 2px #000;
}

#library-background-color {
    /* Dark Effect on background image */
    position: absolute;
    background-color: #000;
    background-size: cover;
    background-attachment: fixed;
    filter: opacity(75%) blur(.25px);
    width: 100%;
    height: 100%;
    /* Get behind main content */
    z-index: -1;
}

.d20 {
    margin-bottom: 20px;
    width: 0;
    height: 0;
    position: relative;
    border: 50px solid transparent;
    border-bottom: 70px solid #47002D;
    top: -50px;
}

.d20:after {
    content: "";
    width: 0;
    height: 0;
    position: absolute;
    left: -50px;
    top: 70px;
    border: 50px solid transparent;
    border-top: 70px solid #47002D;
}

br d20 {
    display: none;
}

.header {
    text-align: center;
    width: 100%;
    min-height: 100px;
    height: auto;
    font-weight: bold;
    font-size: 20px;
    color: white;
    padding-top: 13px;
    text-shadow: 0px 1px 6px black;
}

.main {
    padding-top: 10px;
    padding-bottom: 10px;
    width: 93%;
    height: auto;
    min-height: 500px;
    background-image: linear-gradient( 135deg, #C2FFD8 10%, #465EFB 100%);
    border-radius: 8px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: 0px 1px 10px 2px #000;
}

.sidebar {
    float: left;
    width: 15%;
    height: auto;
    min-height: 450px;
    margin-right: 5px;
    background-color: green;
}

.sidebar two {
    float: right;
    margin-left: 5px;
    width: 15%;
    height: auto;
    min-height: 450px;
    background-color: green;
}

.content {
    margin-left: auto;
    border-radius: 8px;
    margin-right: auto;
    width: 99%;
    height: auto;
    min-height: 400px;
    background-color: #fcdede;
}

.class {
    height: auto;
    min-height: 80px;
    width: 95%;
    background-color: #ded1d1;
    margin-left: auto;
    margin-right: auto;
}

a.button18 {
    width: 25%;
    height: auto;
    min-height: 40px;
    display: inline-block;
    font-size: 19px;
    color: rgb(205, 216, 228);
    text-decoration: none;
    padding: .2em .8em;
    outline: none;
background-image: linear-gradient( 135deg, #97ABFF 10%, #123597 100%);
}

a.button18:hover {
    background-image:
        radial-gradient(1px 60% at 0% 50%, rgba(255, 255, 255, .3), transparent),
        radial-gradient(1px 60% at 100% 50%, rgba(255, 255, 255, .3), transparent),
        linear-gradient(rgb(51, 60, 67), rgb(58, 65, 72));
}

a.button18:focus {
    color: rgb(245, 247, 250);
    border-top: 1px solid rgb(67, 111, 136);
    background-image:
        linear-gradient(rgb(46, 95, 122), rgb(36, 68, 92));
}

a.button18:focus:hover {
    border-top: 1px solid rgb(49, 87, 107);
    background-image:
        linear-gradient(rgb(33, 77, 98), rgb(29, 57, 77));
}

.center {
    margin-left: auto;
    margin-right: auto;
    width: 87%;
    height: auto;
    min-height: 20px;
    border-radius: 8px;
}

.newbooks {
    width: 95%;
    margin-top: 8px;
    border-radius: 8px;
    height: auto;
    min-height: 200px;
    margin-right: auto;
    margin-left: auto;
    background-color: #dbcdcc;
}