.books {
  text-align: center;
}

.books .thumb {
  display: inline-block;
  padding: 3px;
  max-width: 300px;
  vertical-align: top;
  margin: 0 3px;
}

.contur {
  border: 1px solid #ddd;
}

.books img {
  max-height: 300px;
  max-width: 100%;
  transition: box-shadow .25s ease-in-out;
  cursor: pointer;
}

.books img:hover {
  box-shadow: 0 0 7px rgba(0,0,0,0.5);
}

.books img:active {
  box-shadow: 0 0 5px rgba(0,0,0,0.5);
  transition: box-shadow .15s ease-in-out;
}
.sample-container {
  box-sizing: border-box;
  padding-top: min(60%, 80vh);
  position: relative;
  background-color: transparent;
  margin-bottom: 25px;
}
.sample-container>iframe {
  left: 0;
  top: 0;
  position: absolute;
}
.fb3d-button {
  display: inline-block;
  font-size: 13px;
  margin: 0;
  cursor: pointer;
  border-width: 1px;
  border-style: solid;
  border-radius: 3px;
  white-space: nowrap;
  box-sizing: border-box;

  min-height: 32px;
  line-height: 2.30769231;
  padding: 0 12px;

  color: #fff;
  background: #007cba;
  border-color: #007cba;

  text-decoration: none;
  text-shadow: none;
}

a.fb3d-button, a.fb3d-button:visited {
  color: #fff;
}

.fb3d-button:focus,
.fb3d-button:hover {
	background: #0071a1;
	border-color: #0071a1;
	color: #fff;
  text-decoration: none;

}

.fb3d-button:focus {
	box-shadow: 0 0 0 1px #fff, 0 0 0 3px #007cba
}

.fb3d-button:active {
	background: #00669b;
	border-color: #00669b;
	box-shadow: none;
	color: #fff
}

.fb3d-thumbnail {
  position: relative;
  display: inline-block;
  line-height: 0;
}

.fb3d-thumbnail .book-thumbnail {
  display: inline-block;
  transition: box-shadow .25s ease-in-out;
}

.fb3d-thumbnail .book-thumbnail>span {
  -webkit-transform-style: flat;
  -moz-transform-style: preserve-3d;
  transform-style: preserve-3d;
  -webkit-perspective: 1200px;
  -moz-perspective: 1200px;
  perspective: 1200px;
  display: inline-block;
}

.fb3d-thumbnail:hover .book-thumbnail {
  box-shadow: 0 0 7px rgba(0,0,0,0.2);
}

.fb3d-thumbnail:active .book-thumbnail {
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
  transition: box-shadow .15s ease-in-out;
}

.fb3d-thumbnail .book-thumbnail img {
  border-radius: 0;
  -webkit-transform-origin: left;
  transform-origin: left;
  transition: transform .25s;
  cursor: pointer;
  /* height: 300px; */
}

.fb3d-thumbnail:hover .book-thumbnail img {
  transform: rotateY(-20deg) rotateZ(0deg);
}
.fb3d-thumbnail:active .book-thumbnail img {
  transform: rotateY(-17deg) rotateZ(0deg);
  transition: transform .15s;
}

.fb3d-thumbnail.deg17:hover .book-thumbnail img {
  transform: rotateY(-17deg) rotateZ(0deg);
}
.fb3d-thumbnail.deg17:active .book-thumbnail img {
  transform: rotateY(-14deg) rotateZ(0deg);
}

.fb3d-thumbnail.deg9:hover .book-thumbnail img {
  transform: rotateY(-9deg) rotateZ(0deg);
}
.fb3d-thumbnail.deg9:active .book-thumbnail img {
  transform: rotateY(-6deg) rotateZ(0deg);
}

.fb3d-thumbnail .book-heading {
  position: absolute;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.fb3d-thumbnail .book-heading h3 {
  box-sizing: border-box;
  position: absolute;
  width: 100%;
  margin: 0;
  padding: 5px;
  font-weight: normal;
  font-size: 14px;
  line-height: 120%;
  color: #fff;
  text-decoration: none;
  z-index: 1;
  background: rgba(60, 60, 60, 0.8);
  bottom: -100%;
  transition: bottom .3s ease .2s;
}

.fb3d-thumbnail:hover .book-heading h3 {
  bottom: 10px;
  transition-delay: 0s;
}

.fb3d-thumbnail .book-heading h3 span {
  color: #fff;
  text-decoration: none;
}

.fb3d-thumbnail.fb3d-fix-title .book-heading h3 {
    bottom: 10px;
}