[class^="btn-"] {
  position: relative;
  display: block;
  margin: 20px auto;
  width: 100%;
  height: 55px;
  padding: 15px;
  max-width: 250px;
  text-transform: uppercase;
  overflow: hidden;
  border: 1px solid currentColor;
  text-align: center;
}

.btn-10 {
  color: #7c090f;
}
.btn-10:before, .btn-10:after,
.btn-10 span:before,
.btn-10 span:after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 80px;
  background: rgba(124, 9, 15, 0.5);
  -webkit-transition: 0.4s;
  transition: 0.4s;

  z-index: -1;
}
.btn-10:after,
.btn-10 span:before {
  left: auto;
  right: 0;
}
.btn-10 span:before,
.btn-10 span:after {
  -webkit-transition-delay: 0.4s;
          transition-delay: 0.4s;
}
.btn-10:hover {
  color: #ECECEC;
}
.btn-10:hover:before, .btn-10:hover:after,
.btn-10:hover span:before,
.btn-10:hover span:after {
  width: 250px;
}
.btn-10:active {
  background: #7c090f;
}

@-webkit-keyframes criss-cross-left {
  0% {
    left: -20px;
  }
  50% {
    left: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    left: 50%;
    width: 375px;
    height: 375px;
  }
}

@keyframes criss-cross-left {
  0% {
    left: -20px;
  }
  50% {
    left: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    left: 50%;
    width: 375px;
    height: 375px;
  }
}
@-webkit-keyframes criss-cross-right {
  0% {
    right: -20px;
  }
  50% {
    right: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    right: 50%;
    width: 375px;
    height: 375px;
  }
}
@keyframes criss-cross-right {
  0% {
    right: -20px;
  }
  50% {
    right: 50%;
    width: 20px;
    height: 20px;
  }
  100% {
    right: 50%;
    width: 375px;
    height: 375px;
  }
}

@media only screen and (min-width: 481px) {

}

@media only screen and (min-width: 1024px) {


}