a{
  text-decoration: none;
}

.main-wrap {
    background: #000;
        text-align: center;
}
.main-wrap h1 {
        color: #fff;
            margin-top: 50px;
    margin-bottom: 100px;
}
.col-md-3 {
	display: block;
	float:left;
	margin: 1% 0 1% 1.6%;
	  background-color: #eee;
  padding: 50px 0;
}

.col:first-of-type {
  margin-left: 0;
}


/* ALL LOADERS */

.loader{
  width: 100px;
  height: 100px;
  border-radius: 100%;
  position: relative;
  margin: 0 auto;
}

/* LOADER 4 */

#loader-4 span{
  display: inline-block;
  width: 20px;
  height: 20px;
  border-radius: 100%;
  background-color: #3498db;
  margin: 35px 5px;
  opacity: 0;
}

#loader-4 span:nth-child(1){
  animation: opacitychange 1s ease-in-out infinite;
}

#loader-4 span:nth-child(2){
  animation: opacitychange 1s ease-in-out 0.33s infinite;
}

#loader-4 span:nth-child(3){
  animation: opacitychange 1s ease-in-out 0.66s infinite;
}

@keyframes opacitychange{
  0%, 100%{
    opacity: 0;
  }

  60%{
    opacity: 1;
  }
}