.content-flip {
  display: flex;
  margin: 0 auto;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  max-width: 1000px;
}
.content-flip .col-sm-4 {
  height: 350px;
  /* margin: 10px; */
  width: 30%;
  margin: 15px;
}
.heading {
  width: 100%;
  margin-left: 1rem;
  font-weight: 900;
  font-size: 1.618rem;
  text-transform: uppercase;
  letter-spacing: .1ch;
  line-height: 1;
  padding-bottom: .5em;
  margin-bottom: 1rem;
  position: relative;
}
.heading:after {
  display: block;
  content: '';
  position: absolute;
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, #1a9be6, #1a57e6);
  bottom: 0;
}

.description {
  width: 100%;
  margin-top: 0;
  margin-left: 1rem;
  margin-bottom: 3rem;
}

.card {
  color: inherit;
  cursor: pointer;
  /*width: calc(33% - 2rem);
  min-width: calc(33% - 2rem);
  height: 400px;
  min-height: 400px;

  height: 600px;
    */
  perspective: 1000px;
  margin: 1rem;
  min-height: 450px !important;
      perspective: 1000px;
      margin: 1.5rem;
}
@media screen and (max-width: 800px) {
  .card {
    width: calc(50% - 2rem);
  }
}
@media screen and (max-width: 500px) {
  .card {
    width: 100%;
  }
}

.front,
.back {
  display: flex;
  border-radius: 6px;
  background-position: center;
  background-size: cover;
  text-align: center;
  justify-content: center;
  align-items: center;
  position: absolute;
  height: 100%;
  width: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  transition: ease-in-out 400ms;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}

.front {
  background-size: cover;
  padding: 2rem;
  font-size: 1.618rem;
  font-weight: 600;
  color: #fff;
  overflow: hidden;
  font-family: Poppins, sans-serif;
}
.card .front p {
  color: #eea62d;
  font-size: 20px;
  padding: 0.5em 1em;
  font-weight: 900;
  background: #1f222b;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
}
.front:before {
  position: absolute;
  display: block;
  content: '';
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #35015e, #9622ac);
  opacity: .25;
  z-index: -1;
}
.card:hover .front {
  transform: rotateY(180deg);
}
.card:nth-child(even):hover .front {
  transform: rotateY(-180deg);
}

.back {
  background: #1f222b;
  transform: rotateY(-180deg);
  padding: 0 2em;
}
.back .button {
  background: linear-gradient(135deg, #33015d, #9320a9);
}
.back .button:before {
  box-shadow: 0 0 10px 10px rgba(26, 87, 230, 0.25);
  background-color: rgba(26, 87, 230, 0.25);
}
.card:hover .back {
  transform: rotateY(0deg);
}
.card:nth-child(even) .back {
  transform: rotateY(180deg);
}
.card:nth-child(even) .back .button {
  background: linear-gradient(135deg, #e61a80, #e61a3c);
}
.card:nth-child(even) .back .button:before {
  box-shadow: 0 0 10px 10px rgba(230, 26, 60, 0.25);
  background-color: rgba(230, 26, 60, 0.25);
}
.card:nth-child(even):hover .back {
  transform: rotateY(0deg);
}

.button:hover {
 box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);

}

.button {
    /* transform: translateZ(40px); */
    cursor: pointer;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    font-weight: bold;
    color: #fff;
    padding: 0.6em 1em;
    border-radius: 5px;
    font: inherit;
    font-size: 15px;
    font-weight: 600;
    border: none;
    position: relative;
    transform-style: preserve-3d;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
 transition: all 0.3s cubic-bezier(.25,.8,.25,1);
}
/*
.button:before {
  transition: 300ms ease;
  position: absolute;
  display: block;
  content: '';
  transform: translateZ(-40px);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  height: calc(100% - 20px);
  width: calc(100% - 20px);
  border-radius: 100px;
  left: 10px;
  top: 16px;
}

.button:hover {
  transform: translateZ(55px);
}
*/
.button:hover:before {
  transform: translateZ(-55px);
}
.button:active {
  transform: translateZ(20px);
}
.button:active:before {
  transform: translateZ(-20px);
  top: 12px;
}