.frame {
    width: 90%;
    margin: 40px auto;
    text-align: center;
  }
  button {
    margin: 20px;
  }
  .custom-btn {
    width: 130px;
    height: 40px;
    color: #fff;
    border-radius: 5px;
    padding: 5px 25px;
    font-family: 'Lato', sans-serif;
    font-weight: 500;
    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;
  }
  
  /* 1 */
  .btn-1 {
    background: rgb(6,14,131);
    background: linear-gradient(0deg, rgba(6,14,131,1) 0%, rgba(12,25,180,1) 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%);
  }
  
  /* 2 */
  .btn-2 {
    background: rgb(96,9,240);
    background: linear-gradient(0deg, rgba(96,9,240,1) 0%, rgba(129,5,240,1) 100%);
    border: none;
    
  }
  .btn-2:before {
    height: 0%;
    width: 2px;
  }
  .btn-2:hover {
    box-shadow:  4px 4px 6px 0 rgba(255,255,255,.5),
                -4px -4px 6px 0 rgba(116, 125, 136, .5), 
      inset -4px -4px 6px 0 rgba(255,255,255,.2),
      inset 4px 4px 6px 0 rgba(0, 0, 0, .4);
  }
  
  
  /* 3 */
  .btn-3 {
    background: rgb(0,172,238);
  background: linear-gradient(0deg, rgba(0,172,238,1) 0%, rgba(2,126,251,1) 100%);
    width: 130px;
    height: 40px;
    line-height: 42px;
    padding: 0;
    border: none;
    
  }
  .btn-3 span {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
  }
  .btn-3:before,
  .btn-3:after {
    position: absolute;
    content: "";
    right: 0;
    top: 0;
     background: rgba(2,126,251,1);
    transition: all 0.3s ease;
  }
  .btn-3:before {
    height: 0%;
    width: 2px;
  }
  .btn-3:after {
    width: 0%;
    height: 2px;
  }
  .btn-3:hover{
     background: transparent;
    box-shadow: none;
  }
  .btn-3:hover:before {
    height: 100%;
  }
  .btn-3:hover:after {
    width: 100%;
  }
  .btn-3 span:hover{
     color: rgba(2,126,251,1);
  }
  .btn-3 span:before,
  .btn-3 span:after {
    position: absolute;
    content: "";
    left: 0;
    bottom: 0;
     background: rgba(2,126,251,1);
    transition: all 0.3s ease;
  }
  .btn-3 span:before {
    width: 2px;
    height: 0%;
  }
  .btn-3 span:after {
    width: 0%;
    height: 2px;
  }
  .btn-3 span:hover:before {
    height: 100%;
  }
  .btn-3 span:hover:after {
    width: 100%;
  }
  
  /* 4 */
  .btn-4 {
    background-color: #4dccc6;
  background-image: linear-gradient(315deg, #4dccc6 0%, #96e4df 74%);
    line-height: 42px;
    padding: 0;
    border: none;
  }
  .btn-4:hover{
    background-color: #89d8d3;
  background-image: linear-gradient(315deg, #89d8d3 0%, #03c8a8 74%);
  }
  .btn-4 span {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
  }
  .btn-4:before,
  .btn-4:after {
    position: absolute;
    content: "";
    right: 0;
    top: 0;
     box-shadow:  4px 4px 6px 0 rgba(255,255,255,.9),
                -4px -4px 6px 0 rgba(116, 125, 136, .2), 
      inset -4px -4px 6px 0 rgba(255,255,255,.9),
      inset 4px 4px 6px 0 rgba(116, 125, 136, .3);
    transition: all 0.3s ease;
  }
  .btn-4:before {
    height: 0%;
    width: .1px;
  }
  .btn-4:after {
    width: 0%;
    height: .1px;
  }
  .btn-4:hover:before {
    height: 100%;
  }
  .btn-4:hover:after {
    width: 100%;
  }
  .btn-4 span:before,
  .btn-4 span:after {
    position: absolute;
    content: "";
    left: 0;
    bottom: 0;
    box-shadow:  4px 4px 6px 0 rgba(255,255,255,.9),
                -4px -4px 6px 0 rgba(116, 125, 136, .2), 
      inset -4px -4px 6px 0 rgba(255,255,255,.9),
      inset 4px 4px 6px 0 rgba(116, 125, 136, .3);
    transition: all 0.3s ease;
  }
  .btn-4 span:before {
    width: .1px;
    height: 0%;
  }
  .btn-4 span:after {
    width: 0%;
    height: .1px;
  }
  .btn-4 span:hover:before {
    height: 100%;
  }
  .btn-4 span:hover:after {
    width: 100%;
  }
  
  /* 5 */
  .btn-5 {
    width: 130px;
    height: 40px;
    line-height: 42px;
    padding: 0;
    border: none;
    background: rgb(255,27,0);
  background: linear-gradient(0deg, rgba(255,27,0,1) 0%, rgba(251,75,2,1) 100%);
  }
  .btn-5:hover {
    color: #f0094a;
    background: transparent;
     box-shadow:none;
  }
  .btn-5:before,
  .btn-5:after{
    content:'';
    position:absolute;
    top:0;
    right:0;
    height:2px;
    width:0;
    background: #f0094a;
    box-shadow:
     -1px -1px 5px 0px #fff,
     7px 7px 20px 0px #0003,
     4px 4px 5px 0px #0002;
    transition:400ms ease all;
  }
  .btn-5:after{
    right:inherit;
    top:inherit;
    left:0;
    bottom:0;
  }
  .btn-5:hover:before,
  .btn-5:hover:after{
    width:100%;
    transition:800ms ease all;
  }
  
  
  /* 6 */
  .btn-6 {
    background: rgb(247,150,192);
  background: radial-gradient(circle, rgba(247,150,192,1) 0%, rgba(118,174,241,1) 100%);
    line-height: 42px;
    padding: 0;
    border: none;
  }
  .btn-6 span {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
  }
  .btn-6:before,
  .btn-6:after {
    position: absolute;
    content: "";
    height: 0%;
    width: 1px;
   box-shadow:
     -1px -1px 20px 0px rgba(255,255,255,1),
     -4px -4px 5px 0px rgba(255,255,255,1),
     7px 7px 20px 0px rgba(0,0,0,.4),
     4px 4px 5px 0px rgba(0,0,0,.3);
  }
  .btn-6:before {
    right: 0;
    top: 0;
    transition: all 500ms ease;
  }
  .btn-6:after {
    left: 0;
    bottom: 0;
    transition: all 500ms ease;
  }
  .btn-6:hover{
    background: transparent;
    color: #76aef1;
    box-shadow: none;
  }
  .btn-6:hover:before {
    transition: all 500ms ease;
    height: 100%;
  }
  .btn-6:hover:after {
    transition: all 500ms ease;
    height: 100%;
  }
  .btn-6 span:before,
  .btn-6 span:after {
    position: absolute;
    content: "";
    box-shadow:
     -1px -1px 20px 0px rgba(255,255,255,1),
     -4px -4px 5px 0px rgba(255,255,255,1),
     7px 7px 20px 0px rgba(0,0,0,.4),
     4px 4px 5px 0px rgba(0,0,0,.3);
  }
  .btn-6 span:before {
    left: 0;
    top: 0;
    width: 0%;
    height: .5px;
    transition: all 500ms ease;
  }
  .btn-6 span:after {
    right: 0;
    bottom: 0;
    width: 0%;
    height: .5px;
    transition: all 500ms ease;
  }
  .btn-6 span:hover:before {
    width: 100%;
  }
  .btn-6 span:hover:after {
    width: 100%;
  }
  
  /* 7 */
  .btn-7 {
  background: linear-gradient(0deg, rgba(255,151,0,1) 0%, rgba(251,75,2,1) 100%);
    line-height: 42px;
    padding: 0;
    border: none;
  }
  .btn-7 span {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
  }
  .btn-7:before,
  .btn-7:after {
    position: absolute;
    content: "";
    right: 0;
    bottom: 0;
    background: rgba(251,75,2,1);
    box-shadow:
     -7px -7px 20px 0px rgba(255,255,255,.9),
     -4px -4px 5px 0px rgba(255,255,255,.9),
     7px 7px 20px 0px rgba(0,0,0,.2),
     4px 4px 5px 0px rgba(0,0,0,.3);
    transition: all 0.3s ease;
  }
  .btn-7:before{
     height: 0%;
     width: 2px;
  }
  .btn-7:after {
    width: 0%;
    height: 2px;
  }
  .btn-7:hover{
    color: rgba(251,75,2,1);
    background: transparent;
  }
  .btn-7:hover:before {
    height: 100%;
  }
  .btn-7:hover:after {
    width: 100%;
  }
  .btn-7 span:before,
  .btn-7 span:after {
    position: absolute;
    content: "";
    left: 0;
    top: 0;
    background: rgba(251,75,2,1);
    box-shadow:
     -7px -7px 20px 0px rgba(255,255,255,.9),
     -4px -4px 5px 0px rgba(255,255,255,.9),
     7px 7px 20px 0px rgba(0,0,0,.2),
     4px 4px 5px 0px rgba(0,0,0,.3);
    transition: all 0.3s ease;
  }
  .btn-7 span:before {
    width: 2px;
    height: 0%;
  }
  .btn-7 span:after {
    height: 2px;
    width: 0%;
  }
  .btn-7 span:hover:before {
    height: 100%;
  }
  .btn-7 span:hover:after {
    width: 100%;
  }
  
  /* 8 */
  .btn-8 {
    background-color: #f0ecfc;
  background-image: linear-gradient(315deg, #f0ecfc 0%, #c797eb 74%);
    line-height: 42px;
    padding: 0;
    border: none;
  }
  .btn-8 span {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
  }
  .btn-8:before,
  .btn-8:after {
    position: absolute;
    content: "";
    right: 0;
    bottom: 0;
    background: #c797eb;
    /*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);*/
    transition: all 0.3s ease;
  }
  .btn-8:before{
     height: 0%;
     width: 2px;
  }
  .btn-8:after {
    width: 0%;
    height: 2px;
  }
  .btn-8:hover:before {
    height: 100%;
  }
  .btn-8:hover:after {
    width: 100%;
  }
  .btn-8:hover{
    background: transparent;
  }
  .btn-8 span:hover{
    color: #c797eb;
  }
  .btn-8 span:before,
  .btn-8 span:after {
    position: absolute;
    content: "";
    left: 0;
    top: 0;
    background: #c797eb;
    /*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);*/
    transition: all 0.3s ease;
  }
  .btn-8 span:before {
    width: 2px;
    height: 0%;
  }
  .btn-8 span:after {
    height: 2px;
    width: 0%;
  }
  .btn-8 span:hover:before {
    height: 100%;
  }
  .btn-8 span:hover:after {
    width: 100%;
  }
    
  
  /* 9 */
  .btn-9 {
    border: none;
    transition: all 0.3s ease;
    overflow: hidden;
  }
  .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: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);
  }
  
  /* 10 */
  .btn-10 {
    background: rgb(22,9,240);
  background: linear-gradient(0deg, rgba(22,9,240,1) 0%, rgba(49,110,244,1) 100%);
    color: #fff;
    border: none;
    transition: all 0.3s ease;
    overflow: hidden;
  }
  .btn-10:after {
    position: absolute;
    content: " ";
    top: 0;
    left: 0;
    z-index: -1;
    width: 100%;
    height: 100%;
    transition: all 0.3s ease;
    -webkit-transform: scale(.1);
    transform: scale(.1);
  }
  .btn-10:hover {
    color: #fff;
    border: none;
    background: transparent;
  }
  .btn-10:hover:after {
    background: rgb(0,3,255);
  background: linear-gradient(0deg, rgba(2,126,251,1) 0%,  rgba(0,3,255,1)100%);
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  
  /* 11 */
  .btn-11 {
    border: none;
    background: rgb(251,33,117);
      background: linear-gradient(0deg, rgba(251,33,117,1) 0%, rgba(234,76,137,1) 100%);
      color: #fff;
      overflow: hidden;
  }
  .btn-11:hover {
      text-decoration: none;
      color: #fff;
  }
  .btn-11:before {
      position: absolute;
      content: '';
      display: inline-block;
      top: -180px;
      left: 0;
      width: 30px;
      height: 100%;
      background-color: #fff;
      animation: shiny-btn1 3s ease-in-out infinite;
  }
  .btn-11:hover{
    opacity: .7;
  }
  .btn-11:active{
    box-shadow:  4px 4px 6px 0 rgba(255,255,255,.3),
                -4px -4px 6px 0 rgba(116, 125, 136, .2), 
      inset -4px -4px 6px 0 rgba(255,255,255,.2),
      inset 4px 4px 6px 0 rgba(0, 0, 0, .2);
  }
  
  
  @-webkit-keyframes shiny-btn1 {
      0% { -webkit-transform: scale(0) rotate(45deg); opacity: 0; }
      80% { -webkit-transform: scale(0) rotate(45deg); opacity: 0.5; }
      81% { -webkit-transform: scale(4) rotate(45deg); opacity: 1; }
      100% { -webkit-transform: scale(50) rotate(45deg); opacity: 0; }
  }
  
  
  /* 12 */
  .btn-12{
    position: relative;
    right: 20px;
    bottom: 20px;
    border:none;
    box-shadow: none;
    width: 130px;
    height: 40px;
    line-height: 42px;
    -webkit-perspective: 230px;
    perspective: 230px;
  }
  .btn-12 span {
    background: rgb(0,172,238);
  background: linear-gradient(0deg, rgba(0,172,238,1) 0%, rgba(2,126,251,1) 100%);
    display: block;
    position: absolute;
    width: 130px;
    height: 40px;
    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);
    border-radius: 5px;
    margin:0;
    text-align: center;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    -webkit-transition: all .3s;
    transition: all .3s;
  }
  .btn-12 span:nth-child(1) {
    box-shadow:
     -7px -7px 20px 0px #fff9,
     -4px -4px 5px 0px #fff9,
     7px 7px 20px 0px #0002,
     4px 4px 5px 0px #0001;
    -webkit-transform: rotateX(90deg);
    -moz-transform: rotateX(90deg);
    transform: rotateX(90deg);
    -webkit-transform-origin: 50% 50% -20px;
    -moz-transform-origin: 50% 50% -20px;
    transform-origin: 50% 50% -20px;
  }
  .btn-12 span:nth-child(2) {
    -webkit-transform: rotateX(0deg);
    -moz-transform: rotateX(0deg);
    transform: rotateX(0deg);
    -webkit-transform-origin: 50% 50% -20px;
    -moz-transform-origin: 50% 50% -20px;
    transform-origin: 50% 50% -20px;
  }
  .btn-12:hover span:nth-child(1) {
    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);
    -webkit-transform: rotateX(0deg);
    -moz-transform: rotateX(0deg);
    transform: rotateX(0deg);
  }
  .btn-12:hover span:nth-child(2) {
    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);
   color: transparent;
    -webkit-transform: rotateX(-90deg);
    -moz-transform: rotateX(-90deg);
    transform: rotateX(-90deg);
  }
  
  
  /* 13 */
  .btn-13 {
    background-color: #89d8d3;
  background-image: linear-gradient(315deg, #89d8d3 0%, #03c8a8 74%);
    border: none;
    z-index: 1;
  }
  .btn-13:after {
    position: absolute;
    content: "";
    width: 100%;
    height: 0;
    bottom: 0;
    left: 0;
    z-index: -1;
    border-radius: 5px;
     background-color: #4dccc6;
  background-image: linear-gradient(315deg, #4dccc6 0%, #96e4df 74%);
    box-shadow:
     -7px -7px 20px 0px #fff9,
     -4px -4px 5px 0px #fff9,
     7px 7px 20px 0px #0002,
     4px 4px 5px 0px #0001;
    transition: all 0.3s ease;
  }
  .btn-13:hover {
    color: #fff;
  }
  .btn-13:hover:after {
    top: 0;
    height: 100%;
  }
  .btn-13:active {
    top: 2px;
  }
  
  
  /* 14 */
  .btn-14 {
    background: rgb(255,151,0);
    border: none;
    z-index: 1;
  }
  .btn-14:after {
    position: absolute;
    content: "";
    width: 100%;
    height: 0;
    top: 0;
    left: 0;
    z-index: -1;
    border-radius: 5px;
    background-color: #eaf818;
    background-image: linear-gradient(315deg, #eaf818 0%, #f6fc9c 74%);
     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);
    transition: all 0.3s ease;
  }
  .btn-14:hover {
    color: #000;
  }
  .btn-14:hover:after {
    top: auto;
    bottom: 0;
    height: 100%;
  }
  .btn-14:active {
    top: 2px;
  }
  
  /* 15 */
  .btn-15 {
    background: #2676bc;
    border: none;
    z-index: 1;
  }
  .btn-15:after {
    position: absolute;
    content: "";
    width: 0;
    height: 100%;
    top: 0;
    right: 0;
    z-index: -1;
    background-color: #faa41a;
    border-radius: 5px;
     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);
    transition: all 0.3s ease;
  }
  .btn-15:hover {
    color: #fff;
  }
  .btn-15:hover:after {
    left: 0;
    width: 100%;
  }
  .btn-15:active {
    top: 2px;
  }
  
  
  /* 16 */
  .btn-16 {
    border: none;
    color: #000;
  }
  .btn-16:after {
    position: absolute;
    content: "";
    width: 0;
    height: 100%;
    top: 0;
    left: 0;
    direction: rtl;
    z-index: -1;
    box-shadow:
     -7px -7px 20px 0px #fff9,
     -4px -4px 5px 0px #fff9,
     7px 7px 20px 0px #0002,
     4px 4px 5px 0px #0001;
    transition: all 0.3s ease;
  }
  .btn-16:hover {
    color: #000;
  }
  .btn-16:hover:after {
    left: auto;
    right: 0;
    width: 100%;
  }
  .btn-16:active {
    top: 2px;
  }