.four { 
  width: 31.3%; 
}

/* COLUMNS */

.col {
  display: block;
  float:left;
  margin: 1%;
}
/* CLEARFIX */

.cf:before,
.cf:after {
    content: " ";
    display: table; 
}

.cf:after { clear: both; }
.cf { *zoom: 1; }

.box {
  display:inline-block;
  width: 100%;
  height: 280px;
  overflow: hidden;
  background-color: #bbb;
  text-align: center;
  position: relative;
}

.overlay{
  width: 100%;
  height:100%;
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  padding: 10px;
}
.overlay p{ color: #fff;}

/* SLIDE IN */

.slide-in .overlay{
  background-color: #000ed;
  line-height: 280px;
  color: #fff;
  transform: translateX(-100%);
  -webkit-transition: transform 0.5s ease-out;
  -o-transition: transform 0.5s ease-out;
  transition: transform 0.5s ease-out;
}

.slide-in .box:hover .overlay{
  transform: translateX(0);
}

/* SLIDE UP */

.slide-up .overlay{
  background-color: #000ed;
  line-height: 200px;
  color: #fff;
  transform: translateY(100%);
  -webkit-transition: transform 0.5s ease-out;
  -o-transition: transform 0.5s ease-out;
  transition: transform 0.5s ease-out;
}

.slide-up .box:hover .overlay{
  transform: translateY(0);
}

/* SLIDE DOWN DELAY */

.slide-down-delay .overlay{
  background-color: #000ed;
  line-height: 200px;
  color: #fff;
  transform: translateY(-100%);
  -webkit-transition: transform 0.5s ease-out;
  -o-transition: transform 0.5s ease-out;
  transition: transform 0.5s ease-out;
}

.slide-down-delay .box:hover .overlay{
  transform: translateY(0);
}

.slide-down-delay .overlay i{
  transform: translateY(-80%);
  opacity: 0;
  -webkit-transition: transform 0.5s linear, opacity 0.5s linear 0.5s;
  -o-transition: transform 0.5s linear, opacity 0.5s linear 0.5s;
  transition: transform 0.5s linear, opacity 0.5s linear 0.5s;
}

.slide-down-delay .box:hover .overlay i{
  transform: translateY(0);
  opacity: 1;
}

/* ROTATE */

.rotate .overlay{
  background-color: #000ed;
  line-height: 200px;
  color: #fff;
  transform-origin: 0 0;
  transform: rotate(90deg);
  -webkit-transition: transform 0.5s ease-in-out;
  -o-transition: transform 0.5s ease-in-out;
  transition: transform 0.5s ease-in-out;
}

.rotate .box:hover .overlay{
  transform: rotate(0deg);
}

/* SCALE */

.scale .overlay{
  background-color: #000ed;
  line-height: 200px;
  color: #fff;
  transform: translateX(210%) scale(3);
  -webkit-transition: transform 0.6s ease-in-out;
  -o-transition: transform 0.6s ease-in-out;
  transition: transform 0.6s ease-in-out;
}

.scale .box:hover .overlay{
  transform: translateX(0) scale(1);
}

/* FLIP */

.flip .overlay{
  background-color: #000ed;
  line-height: 200px;
  color: #fff;
  opacity: 0;
  transform: rotateY(180deg);
  -webkit-transition: transform 0.6s ease-in-out 0.3s, opacity 0.3s ease-in-out;
  -o-transition: transform 0.6s ease-in-out 0.3s, opacity 0.3s ease-in-out;
  transition: transform 0.6s ease-in-out 0.3s, opacity 0.3s ease-in-out;
}

.flip .box:hover .overlay{
  opacity: 1;
  transform: rotateY(0deg);
}

/* SKEW */

.skew .overlay{
  background-color: #000ed;
  line-height: 200px;
  color: #fff;
  opacity: 0;
  transform: skewX(-10deg);
  -webkit-transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
  -o-transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
  transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

.skew .box:hover .overlay{
  transform: skewX(0deg);
  opacity: 1;
}

/* CORNER */

.corner-bottom .overlay{
  background-color: #000ed;
  line-height: 200px;
  color: #fff;
  transform: translate(100%, 100%);
  -webkit-transition: transform 0.4s ease-in-out;
  -o-transition: transform 0.4s ease-in-out;
  transition: transform 0.4s ease-in-out;
}

.corner-bottom .box:hover .overlay{
   transform: translate(0, 0);
}

/* CORNER */

.corner-top .overlay{
  background-color: #000ed;
  line-height: 200px;
  color: #fff;
  transform: translate(-100%, -100%);
  -webkit-transition: transform 0.4s ease-in-out;
  -o-transition: transform 0.4s ease-in-out;
  transition: transform 0.4s ease-in-out;
}

.corner-top .box:hover .overlay{
   transform: translate(0, 0);
}