.button-1 {
  padding: 15px 25px;
  border: unset;
  border-radius: 15px;
  color: #212121;
  z-index: 1;
  background: #e8e8e8;
  position: relative;
  font-weight: 1000;
  font-size: 17px;
  -webkit-box-shadow: 4px 8px 19px -3px rgba(0,0,0,0.27);
  box-shadow: 4px 8px 19px -3px rgba(0,0,0,0.27);
  transition: all 250ms;
 
 }
 
 .button-1::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0;
  border-radius: 15px;
  background-color: #212121;
  z-index: -1;
  -webkit-box-shadow: 4px 8px 19px -3px rgba(0,0,0,0.27);
  box-shadow: 4px 8px 19px -3px rgba(0,0,0,0.27);
  transition: all 250ms
 }
 
 .button-1:hover {
  color: #e8e8e8;
 }
 
 .button-1:hover::before {
  width: 100%;
 }

 .button-2 {
  font-family: monospace;
  font-size: 1.5rem;
  color: #FAFAFA;
  text-transform: uppercase;
  padding: 10px 20px;
  border-radius: 10px;
  border: 2px solid #FAFAFA;
  background: #252525;
  box-shadow: 3px 3px #fafafa;
  cursor: pointer;
  margin: 35px 0;
}

.button-2:active {
  box-shadow: none;
  transform: translate(3px, 3px);
}

.button-3 {
  background-color: #00BFA6;
  padding: 14px 40px;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 2px;
  cursor: pointer;
  border-radius: 10px;
  border: 2px dashed #00BFA6;
  box-shadow: rgba(50, 50, 93, 0.25) 0px 2px 5px -1px, rgba(0, 0, 0, 0.3) 0px 1px 3px -1px;
  transition: .4s;
 }
 
 .button-3:hover {
  transition: .4s;
  border: 2px dashed #00BFA6;
  background-color: #fff;
  color: #00BFA6;
 }
 
 .button-3:active {
  background-color: #87dbd0;
 }

 .button-4 {
  background-color: #444141;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  padding: 15px 30px;
  font-size: 18px;
  font-weight: bold;
  letter-spacing: 1px;
  border: none;
 }
 
 .button-4:hover {
  background-image: linear-gradient(90deg, #53cbef 0%, #dcc66c 50%, #ffa3b6 75%, #53cbef 100%);
  animation: slidernbw 5s linear infinite;
  color: #000;
 }
 
 @keyframes slidernbw {
  to {
   background-position: 20vw;
  }
 }

 .button-5 {
  --color: #0077ff;
  font-family: inherit;
  display: inline-block;
  padding: 15px 20px ;
  line-height: 2.5em;
  overflow: hidden; 
  font-size: 17px;
  z-index: 1;
  color: var(--color);
  border: 2px solid var(--color);
  border-radius: 6px;
  position: relative;
}

.button-5::before {
  position: absolute;
  content: "";
  background: var(--color);
  width: 255px;
  height: 100px;
  z-index: -1;
  border-radius: 50%;
}

.button-5:hover {
  color: white;
}

.button-5:before {
  top: 100%;
  left: 100%;
  transition: .3s all;
}

.button-5:hover::before {
  top: -30px;
  left: -30px;
}