.site_overlay {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 100px 0px;
  display: none;
  background-color: rgba(255, 255, 255, 0.6);
  z-index: 9999991010;
  text-align: center; }
  .site_overlay .box {
    float: none;
    display: inline-block;
    position: relative;
    padding-left: 110px;
    padding-right: 110px;
    max-width: 1283px;
    text-align: left;
    padding-bottom: 40px;
    background-color: #ebebeb;
    padding-top: 80px; }
    .site_overlay .box .close {
      position: absolute;
      background-image: url(../img/ebooks/close.png);
      width: 32px;
      height: 32px;
      top: 18px;
      right: 18px;
      cursor: pointer; }
    .site_overlay .box .ebooks, .site_overlay .box .title {
      float: left;
      width: 100%;
      margin-top: 0px;
      margin-bottom: 0px; }
    .site_overlay .box .title {
      height: 74px;
      font-size: 30px;
      font-family: "Comfortaa", cursive;
      font-weight: 700;
      text-transform: uppercase; }
    .site_overlay .box .ebooks .ebook {
      float: left;
      margin-right: 90px;
      width: 294px; }
      .site_overlay .box .ebooks .ebook:last-child {
        margin-right: 0px; }
      .site_overlay .box .ebooks .ebook .img {
        width: 100%;
        float: left;
        text-align: left; }
      .site_overlay .box .ebooks .ebook a.knop {
        width: 100%;
        float: left;
        display: block;
        margin-top: 20px;
        padding-left: 16px;
        border-bottom-right-radius: 35px;
        background-color: #88a2a6;
        font-family: "Lato", sans-serif;
        text-transform: uppercase;
        color: #FFF;
        font-size: 16px;
        line-height: 24px;
        padding-bottom: 10px;
        padding-top: 10px;
        text-decoration: none; }
        .site_overlay .box .ebooks .ebook a.knop i {
          display: inline-block;
          background-image: url(../img/ebooks/ic_next.png);
          width: 10px;
          height: 12px;
          margin-left: 20px; }

.sticky_box {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0px;
  bottom: 0px;
  width: 271px;
  height: 247px;
  background-color: #ebebeb;
  background-image: url(../img/ebooks/sticky.png);
  cursor: pointer; }
  .sticky_box .close {
    position: absolute;
    background-image: url(../img/ebooks/close.png);
    width: 32px;
    height: 32px;
    top: 18px;
    right: 18px;
    cursor: pointer; }

@media screen and (max-width: 1400px) {
  .site_overlay .box {
    padding-left: 50px;
    padding-right: 50px;
    max-width: 1000px; }
    .site_overlay .box .ebooks .ebook {
      margin-right: 60px;
      width: 254px; } }
@media screen and (max-width: 1023px) {
  .site_overlay .box {
    padding-left: 10px;
    padding-right: 10px;
    max-width: 720px; }
    .site_overlay .box .ebooks .ebook {
      margin-right: 15px;
      width: 217px; }
    .site_overlay .box .ebooks a.knop {
      font-size: 13px;
      padding-left: 10px; } }
@media screen and (max-width: 768px) {
  .site_overlay {
    padding-top: 20px; }
    .site_overlay .box {
      padding-left: 10px;
      padding-right: 10px;
      padding-top: 60px;
      max-width: 300px; }
      .site_overlay .box .title {
        font-size: 20px; }
      .site_overlay .box .ebooks .ebook {
        width: 100%;
        margin-right: 0px;
        margin-bottom: 40px; }
      .site_overlay .box .ebooks a.knop {
        font-size: 13px;
        padding-left: 10px; } }