.flip-card,
.flip-box,
.front,
.back {
  width: 100%;
  min-width:325px;
  height: auto;
  min-height: 845px;
  border-radius: 10px;
}

.flip-card,
.flip_box {
  position: relative;
}


.front,
.back {
  position: absolute;
  -webkit-backface-visibility: hidden;
  -moz-backface-visibility: hidden;
  backface-visibility: hidden;
}

.flip-card {
  -moz-transform: perspective(1200px);
  -webkit-perspective: 1200px;
  perspective: 1200px;
}

.flip_box {
  transition: all 0.5s ease-out;
  -webkit-transform-style: preserve-3d;
  -moz-transform-style: preserve-3d;
  transform-style: preserve-3d;
}

.front {
  background-color: #024395;
  background-image: url('../Images/Space_Pics/Molecular_cloud_Pillar_cut.png');
  background-position: center top;
  background-size: cover;
}


.back {
  background: linear-gradient(to bottom right, #003300 0%, #009933 120%);
  -webkit-transform: rotateY(180deg);
  -moz-transform: rotateY(180deg);
  -ms-transform: rotateY(180deg);
  transform: rotateY(180deg);
}


.flipped {
  -webkit-transform: rotateY(-180deg);
  -moz-transform: rotateY(-180deg);
  -ms-transform: rotateY(-180deg);
  transform: rotateY(-180deg);
}

.r_wrap {
  position: absolute;
  right: 40px;
  bottom: 38px;
}

.b_round,
.s_round {
  position: absolute;
  right: 0px;
  bottom: 0px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background-color: #D21849;
  transition: all 0.2s linear;
}

.b_round {
  opacity: 0;
  background-color: #D21849;
}

.b_round_hover {
  transform: scale(1.37);
  opacity: 0.4;
}

.b_round_back_hover {
  background-color: #F60044;
}

.s_round_click {
  transform: scale(1.7);
}

.s_round_back {
  background-color: #C30C3D;
}

.s_arrow {
  width: 52px;
  height: 52px;
  background-image: url('https://img-fotki.yandex.ru/get/194549/29644339.5/0_d6c60_1d7815f0_orig');
  background-color: transparent;
  transition: all 0.35s linear;
}

.s_arrow_rotate {
  transform: rotate(-180deg);
}

.b_headline {
  text-align: center;
  font-family: 'Raleway', sans-serif;
  color: #fff;
  letter-spacing: 0.02em;
  font-weight: 600;
  font-size: 1.6em;  
  padding-top: 40px;
}

.b_text {
  font-family: 'Raleway', sans-serif;
  color: #fff;
  letter-spacing: 0.02em;
  font-weight: 600;
  font-size: 1em;
  line-height: 28px;
  padding: 10px;
  opacity: 0.9;
}