.btc_btn {
  background: linear-gradient(30deg, #000 35%, #ea8b19 73%);
  position: relative;
  padding: 5px 15px;
  font-family: 'Mulish';
  font-size: 14.5px;
  font-weight: 500;
  color: white;
  border: 2px solid #ea8b19;
  border-radius: 8px;
  transition: all .3s ease-in-out;
  margin-top: -3.5px;
  left: 5px;
}

.btc_star-1 {
  position: absolute;
  fill: #ea8b19;
  top: 20%;
  left: 20%;
  width: 25px;
  height: auto;
  filter: drop-shadow(0 0 0 #ea8b19);
  z-index: -5;
  transition: all 1s cubic-bezier(0.05, 0.83, 0.43, 0.96);
}

.btc_star-2 {
  position: absolute;
  fill: #ea8b19;
  top: 45%;
  left: 45%;
  width: 15px;
  height: auto;
  filter: drop-shadow(0 0 0 #ea8b19);
  z-index: -5;
  transition: all 1s cubic-bezier(0, 0.4, 0, 1.01);
}

.btc_star-3 {
  position: absolute;
  fill: #ea8b19;
  top: 40%;
  left: 40%;
  width: 5px;
  height: auto;
  filter: drop-shadow(0 0 0 #ea8b19);
  z-index: -5;
  transition: all 1s cubic-bezier(0, 0.4, 0, 1.01);
}

.btc_star-4 {
  position: absolute;
  fill: #ea8b19;
  top: 20%;
  left: 40%;
  width: 8px;
  height: auto;
  filter: drop-shadow(0 0 0 #ea8b19);
  z-index: -5;
  transition: all .8s cubic-bezier(0, 0.4, 0, 1.01);
}

.btc_star-5 {
  position: absolute;
  fill: #ea8b19;
  top: 25%;
  left: 45%;
  width: 15px;
  height: auto;
  filter: drop-shadow(0 0 0 #ea8b19);
  z-index: -5;
  transition: all .6s cubic-bezier(0, 0.4, 0, 1.01);
}

.btc_star-6 {
  position: absolute;
  fill: #ea8b19;
  top: 5%;
  left: 50%;
  width: 5px;
  height: auto;
  filter: drop-shadow(0 0 0 #ea8b19);
  z-index: -5;
  transition: all .8s ease;
}

.btc_btn:hover {
  background: #000;
  color: #ea8b19;
  box-shadow: 0 0 50px #ea8b19;
}

.btc_btn:hover .btc_star-1 {
  position: absolute;
  top: -110%;
  left: -60%;
  width: 30px;
  height: auto;
  filter: drop-shadow(0 0 10px #ea8b19);
  z-index: 2;
}

.btc_btn:hover .btc_star-2 {
  position: absolute;
  top: -45%;
  left: 0%;
  width: 20px;
  height: auto;
  filter: drop-shadow(0 0 10px #ea8b19);
  z-index: 2;
}

.btc_btn:hover .btc_star-3 {
  position: absolute;
  top: 55%;
  left: 15%;
  width: 11px;
  height: auto;
  filter: drop-shadow(0 0 10px #ea8b19);
  z-index: 2;
}

.btc_btn:hover .btc_star-4 {
  position: absolute;
  top: 45%;
  left: 85%;
  width: 15px;
  height: auto;
  filter: drop-shadow(0 0 10px #ea8b19);
  z-index: 2;
}

.btc_btn:hover .btc_star-5 {
  position: absolute;
  top: 25%;
  left: 140%;
  width: 25px;
  height: auto;
  filter: drop-shadow(0 0 10px #ea8b19);
  z-index: 2;
}

.btc_btn:hover .btc_star-6 {
  position: absolute;
  top: -5%;
  left: 60%;
  width: 15px;
  height: auto;
  filter: drop-shadow(0 0 10px #ea8b19);
  z-index: 2;
}

.fil0 {
  fill: #ea8b19;
}

.btc_box {
  width: 80px;
  height: 30px;
  float: left;
  transition: .5s linear;
  position: relative;
  display: block;
  padding: 5px;
  margin: -2px -5.5px;
  background: transparent;
  /* text-transform: uppercase; */
  font-weight: bold;
}

.btc_box:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  color: white;
  background: black;
}

.btc_box:hover:before {
  border-color: #fff;
  height: 100%;
  transform: translateX(0);
  transition: .3s transform linear, .3s height linear .3s;
}

.btc_box:hover:after {
  border-color: #ea8b19;
  height: 100%;
  transform: translateX(0);
  transition: .3s transform linear, .3s height linear .5s;
}

.btc_box:before {
  position: absolute;
  content: '';
  left: 0;
  bottom: 0;
  height: 4px;
  width: 100%;
  border-bottom: 4px solid transparent;
  border-left: 4px solid transparent;
  box-sizing: border-box;
  transform: translateX(100%);
}

.btc_box:after {
  position: absolute;
  content: '';
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  border-top: 4px solid transparent;
  border-right: 4px solid transparent;
  box-sizing: border-box;
  transform: translateX(-100%);
}