.btn-9:after {
    position: absolute;
    content: " ";
    z-index: -1;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #1fd1f9;
    background-image: linear-gradient(315deg, #1fd1f9 0%, #b621fe 74%);
    transition: all 0.3s ease;
}

.btn-9 {
    border: none;
    transition: all 0.3s ease;
    overflow: hidden;
}

.btn-9:hover {
  background: transparent;
  box-shadow:  4px 4px 6px 0 rgba(255,255,255,.5),
              -4px -4px 6px 0 rgba(116, 125, 136, .2), 
    inset -4px -4px 6px 0 rgba(255,255,255,.5),
    inset 4px 4px 6px 0 rgba(116, 125, 136, .3);
  color: #fff;
}
.btn-9:hover:after {
  -webkit-transform: scale(2) rotate(180deg);
  transform: scale(2) rotate(180deg);
  box-shadow:  4px 4px 6px 0 rgba(255,255,255,.5),
              -4px -4px 6px 0 rgba(116, 125, 136, .2), 
    inset -4px -4px 6px 0 rgba(255,255,255,.5),
    inset 4px 4px 6px 0 rgba(116, 125, 136, .3);
}

.btn-1 {
  background: rgb(6,14,131);
    background: linear-gradient(0deg, #ef0414 0%, #ff0000cc 100%);
    border: none;
}
.btn-1:hover {
   background: rgb(0,3,255);
background: linear-gradient(0deg, rgba(0,3,255,1) 0%, rgba(2,126,251,1) 100%);
}

.custom-btn {
    width: 90px;
    height: 35px;
    color: #fff;
    line-height: 25px;
    border-radius: 5px;
    padding: 10px 10px 0px 21px;
    font-family: 'Lato', sans-serif;
    font-weight: bold;
    /* background: transparent; */
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    display: inline-block;
    box-shadow: inset 2px 2px 2px 0px rgba(255,255,255,.5), 7px 7px 20px 0px rgba(0,0,0,.1), 4px 4px 5px 0px rgba(0,0,0,.1);
    outline: none;
}

button_one {
    margin: 20px;
}