.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  width: 200px;
}

.container .btn {
  height: 50px;
  margin: 20px;
  margin-bottom: 40px;
  position: relative;
  width: 155px;
}

.container .btn a {
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 30px;
  box-shadow: 0 15px 35px rgba(255, 255, 255, 0.2);
  color: #fff;
  display: flex;
  font-size: 18px;
  font-weight: 700;
  left: 0;
  top: 0;
  position: absolute;
  height: 100%;
  width: 100%;
  justify-content: center;
  letter-spacing: 1px;
  text-decoration: none;
  overflow: hidden;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(15px);
  z-index: 1;
  transition: 0.5s;
}

.container .btn:hover a {
  letter-spacing: 2px;
}

.container .btn a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(to left,
                rgba(255,255,255,0.15),
                transparent);
  transform: skewX(45deg) translateX(0);
  transition: 0.5s;
}

.container .btn:hover a::before {
  transform: skewX(45deg) translateX(200%);
}

.container .btn::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -5px;
  height: 10px;
  width: 30px;
  background: rgb(249, 26, 1);
  border-radius: 10px;
  transition: 0.5s;
  transition-delay: 0s;
}

.container .btn:hover::before {
  bottom: 0;
  height: 50%;
  width: 80%;
  border-radius: 30px;
  transition-delay: 0.5s;
}

.container .btn::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: -5px;
  height: 10px;
  width: 30px;
  background: rgb(255, 0, 0);
  border-radius: 10px;
  transition: 0.5s;
  transition-delay: 0s;
}

.container .btn:hover::after {
  top: 0;
  height: 50%;
  width: 80%;
  border-radius: 30px;
  transition-delay: 0.5s;
}

.container .btn:nth-child(1):before,
.container .btn:nth-child(1)::after {
  background: #ff0000;
  box-shadow: 0 0 5px #ff00008a,
    0 0 15px #ff2b2b,
    0 0 30px #ff2b2b,
    0 0 60px #ff2b2b;
}

.container .btn:active a {
  color: #000;
}