div#book-list {
  display: inline-block;
  background: #222;
  padding-top: 10px;
}

/* 2-GRID */
@media screen and (min-width: 600px) {
  div#book-list {
    -moz-column-count: 2;
    -webkit-column-count: 2;
    column-count: 2;
  }
}
/* 3-GRID */
@media screen and (min-width: 900px) {
  div#book-list {
    -moz-column-count: 3;
    -webkit-column-count: 3;
    column-count: 3;
  }
}
/* 4-GRID */
@media screen and (min-width: 1200px) {
  div#book-list {
    -moz-column-count: 4;
    -webkit-column-count: 4;
    column-count: 4;
  }
}

.book-thumbnail {
  margin-left: 10px;
  margin-right: 10px;
  margin-bottom: 30px;
  border-radius: 0;
  padding: 4px;
  border: 1px solid #dddddd;
  float: left;
  -moz-page-break-inside: avoid;
  -webkit-column-break-inside: avoid;
  break-inside: avoid;
  background: #fff;
  position: relative;
}

.book-thumbnail:hover {
  background: rgb(212, 250, 247);
  border: 2px solid rgb(252, 185, 41);
  cursor: pointer;
}

.book-thumbnail .status-block {
  position: absolute;
  right: 0px;
  top: 0px;
}

.book-thumbnail .status-block .status-background {
  position: absolute;
  right: 0px;
  width: 0px;
  height: 0px;
  border-top: 50px solid rgb(158, 158, 158);
  border-left: 50px solid transparent;
}

.book-thumbnail .status-block .status-font {
  position: absolute;
  width: 50px;
  height: 50px;
  transform: rotate(45deg);
  color: rgb(255, 255, 255);
  right: -7px;
  top: 5px;
  font-size: 15px;
}

.book-thumbnail .status-block .readed {
  border-top: 50px solid gray;
}
.book-thumbnail .status-block .reading {
  border-top: 50px solid red;
}
.book-thumbnail .status-block .wanted {
  border-top: 50px solid darkorchid;
}

.book-thumbnail h3 {
  margin-top: 0px;
  margin-bottom: 10px;
  font-family: "Gill Sans", sans-serif;
  text-transform: uppercase;
  font-size: 1em;
  text-align: center;
}

.book-thumbnail a {
  padding: 0;
}

.book-thumbnail img {
  max-width: 96%;
  height: auto;
  margin: 0 auto;
  display: block;
  max-height: 420px;
}

.book-thumbnail .caption {
  overflow-y: hidden;
  color: #555;
  padding: 9px;
}

.book-content {
  font-size: 10px;
  color: black;
  line-height: 16px;
}