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HTML 

              
                <div class="container">
  <div class="category">
    <div>
      <h1>Shadow</h1>
    </div>
    <div class="buttons-wrapper">
      <div><a class="click-btn btn-style1" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style2" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style3" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style4" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style5" href="#">Hover me</a></div>
    </div>
  </div>
  <div class="category">
    <div>
      <h1>Background</h1>
    </div>
    <div class="buttons-wrapper">
      <div><a class="click-btn btn-style500" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style501" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style502" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style503" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style504" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style505" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style506" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style507" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style508" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style509" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style510" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style511" href="#"><span>Hover me</span></a></div>
    </div>
  </div>

  <div class="category">
    <div>
      <h1>Border</h1>
    </div>
    <div class="buttons-wrapper">
      <div><a class="click-btn btn-style700" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style701" href="#"><span>Hover me</span></a></div>
      <div><a class="click-btn btn-style702" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style703" href="#"><span>Hover me</span></a></div>
    </div>
  </div>

  <div class="category">
    <div>
      <h1>Other</h1>
    </div>
    <div class="buttons-wrapper">
      <div><a class="click-btn btn-style900" href="#" data-hover="Click me!">Hover me</a></div>
      <div><a class="click-btn btn-style901" href="#">Hover me</a></div>
      <div>
        <a class="click-btn btn-style902" href="#">
          <div class="block"><span></span></div>
          <span data-name="hover">Hover</span>
          <span data-name="me">me</span>
        </a>
      </div>
      <div><a class="click-btn btn-style903" href="#">Hover me</a></div>
      <div>
        <a class="click-btn btn-style904" data-hover="Click me!" href="#">
          <span>Hover me</span>
        </a>
      </div>
      <div><a class="click-btn btn-style905" href="#">Hover me</a></div>
      <div><a class="click-btn btn-style906" href="#" data-hover="Click me!">Hover me</a></div>
    </div>
  </div>
</div>
!

CSS 

              
                @import url("https://fonts.googleapis.com/css2?family=Fredoka+One&display=swap");

$background: #fafbff;
$button-width: 120px;
$border-radius: 5px;

html {
  font-family: "Fredoka One", cursive;
  background-color: $background;
}

.container {
  width: 100%;
  height: 100%;
  display: flex;
  position: fixed;
  flex-flow: column;
  overflow:auto;
  top: 0;
  left: 0;
  padding: 5px 20px;
}

h1 {
  display: inline-block;
  position: relative;
  margin: 2.5rem 0.5rem 0.5rem 50px;
  background: $background;
  font-size: 1.68rem;
  font-weight: bold;
  padding: 0 10px;
  &::before {
    width: calc(100% + 80px);
    height: 5px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #000;
    content: "";
    z-index: -1;
  }
}

.click-btn {
  display: flex;
  width: $button-width;
  height: 40px;
  justify-content: center;
  align-items: center;
  margin: 0.5rem;
  line-height: 35px;
  border: 1px solid;
  border-radius: $border-radius;
  text-align: center;
  font-size: 16px;
  color: #000;
  text-decoration: none;
  transition: all 0.35s;
  box-sizing: border-box;
}

.buttons-wrapper {
  display: flex;
  flex-wrap: wrap;
}

.updating {
  margin: 3em;
  text-align: center;
}

// button style

.btn-style1 {
  $btn-color: #979695;
  $btn-hover-color: #5e5e5e;
  position: relative;
  border-color: $btn-color;
  color: $btn-color;
  &:hover {
    transform: translateY(-0.25em);
    border-color: $btn-hover-color;
    color: $btn-hover-color;
    &::before {
      opacity: 1;
    }
  }
  &::before {
    width: 100%;
    height: 1em;
    position: absolute;
    left: 0;
    bottom: -1.35em;
    background: radial-gradient(
      ellipse at center,
      rgba(0, 0, 0, 0.35) 0%,
      rgba(0, 0, 0, 0) 80%
    );
    opacity: 0;
    transition: all 0.65s;
    content: "";
  }
}

.btn-style2 {
  $btn-color: #dd7e2a;
  $btn-hover-color: #b5c952;
  border-color: $btn-color;
  color: $btn-color;
  &:hover {
    box-shadow: 0 0.25em 0.25em -0.1em $btn-hover-color;
    transform: translateY(-0.25em);
    border-color: $btn-hover-color;
    color: $btn-hover-color;
  }
}

.btn-style3 {
  $btn-color: #979695;
  $btn-hover-color: #5e5e5e;
  border-color: $btn-color;
  color: $btn-color;
  &:hover {
    transform: translateY(-0.25em);
    box-shadow: 0 0 0.5em 0em $btn-hover-color;
    border-color: $btn-hover-color;
    color: $btn-hover-color;
  }
}

.btn-style4 {
  $btn-color: #716eef;
  $btn-hover-color: #dd648a;
  border-color: $btn-color;
  color: $btn-color;
  &:hover {
    box-shadow: inset 0 0 0.55em 0em $btn-hover-color;
    border-color: $btn-hover-color;
    color: $btn-hover-color;
  }
}

.btn-style5 {
  $btn-color: #979695;
  $btn-hover-color: #dd6395;
  $offset: 0.3em;
  border-color: $btn-color;
  color: $btn-color;
  box-shadow: $offset $offset 0 $btn-hover-color;
  &:hover {
    box-shadow: (-$offset) (-$offset) 0 $btn-color;
    background-color: $btn-hover-color;
    border-color: $btn-hover-color;
    color: #fff;
  }
}

.btn-style500 {
  $btn-color: #716eef;
  border-color: $btn-color;
  color: $btn-color;
  &:hover {
    color: #fff;
    transition-delay: 0.2s;
    animation: ani500 0.6s forwards;
    background: radial-gradient(circle, $btn-color 0.2em, transparent 0.3em) 6em
        6em/1em 1em,
      radial-gradient(circle, $btn-color 0.2em, transparent 0.3em) 0 0/1em 1em;
  }
}
@keyframes ani500 {
  100% {
    background-size: 2.375em 2.375em, 0.1em 0.1em;
  }
}

.btn-style501 {
  $btn-color: linear-gradient(to right, #a1c4fd 0%, #c2e9fb 51%, #a1c4fd 100%);
  background-image: $btn-color;
  background-size: 200% auto;
  background-position: left top;
  border-color: transparent;
  color: #464646;
  &:hover {
    background-position: right bottom;
    color: #000;
  }
}

.btn-style502 {
  $btn-color1: #716eef;
  $btn-color2: #fbb8a9;
  $btn-gradient: #c15b44;
  border-color: $btn-color1;
  color: #fff;
  background: repeating-linear-gradient(
    40deg,
    $btn-color1 0%,
    $btn-color1 5%,
    $btn-color2 5%,
    $btn-gradient 10%
  );
  text-shadow: 1px 1px 0em #000;
  &:hover {
    background-position: 120px;
    text-shadow: 2px 2px 0.2em #000;
  }
}

.btn-style503 {
  $btn-color: #dd6395;
  $btn-hover-color: #dd7e2a;
  border-color: $btn-color;
  color: $btn-color;
  transition: all 0.5s;
  &:hover {
    box-shadow: inset 5em 0 0 0 $btn-hover-color,
      inset -5em 0 0 0 $btn-hover-color;
    border-color: $btn-hover-color;
    color: #fff;
  }
}

.btn-style504 {
  $btn-color: #dd7e2a;
  $btn-hover-color: #dd648a;
  border-color: $btn-color;
  color: $btn-color;
  transition: all 0.5s;
  &:hover {
    box-shadow: inset 0 1.5em 0em 0em $btn-hover-color,
      inset 0 -1.5em 0em 0em $btn-hover-color;
    border-color: $btn-hover-color;
    color: #fff;
  }
}

.btn-style505 {
  $btn-color: #716eef;
  $btn-hover-color: #dd648a;
  border-color: $btn-color;
  color: $btn-color;
  transition: all 0.5s;
  &:hover {
    box-shadow: inset 0 0 0 2em $btn-hover-color;
    border-color: $btn-hover-color;
    color: #fff;
  }
}

.btn-style506 {
  $btn-color: #dd7e2a;
  position: relative;
  border-color: $btn-color;
  color: $btn-color;
  overflow: hidden;
  &::before {
    width: 20%;
    height: 100%;
    position: absolute;
    top: 50%;
    left: 0;
    background-color: $btn-color;
    transform: rotateZ(-45deg) translate(-50%, -50%);
    transition: all 0.3s;
    content: "";
    z-index: -1;
  }
  &:hover {
    color: #fff;
    &::before {
      width: 100%;
      top: 0;
      transform: none;
    }
  }
}

.btn-style507 {
  $btn-color: #dd6395;
  position: relative;
  border-color: $btn-color;
  color: $btn-color;
  overflow: hidden;
  &::before {
    width: 15%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: $btn-color;
    transform: rotateZ(-45deg) translate(-50%, -50%);
    transition: all 0.3s;
    content: "";
    z-index: -1;
  }
  &:hover {
    color: #fff;
    transition-delay: 0.35s;
    // background-color:$btn-color;
    &::before {
      animation: ani507 0.6s forwards;
    }
  }
}
@keyframes ani507 {
  10% {
    width: 0;
    transform: rotateZ(-45deg) translate(-100%, -50%);
  }
  20% {
    width: 0;
    transform: rotateZ(0) translate(-100%, 85%);
  }
  60% {
    width: 100%;
    transform: rotateZ(0) translate(0, 85%);
  }
  100% {
    width: 100%;
    transform: rotateZ(0) translate(0, 0);
  }
}

.btn-style508 {
  $btn-color: #5e5e5e;
  $btn-hover-color: #117831;
  position: relative;
  border-color: $btn-color;
  color: $btn-color;
  overflow: hidden;
  &::before {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    border-radius: $border-radius;
    transform: translate(-100%, 0) rotate(50deg);
    transform-origin: top left;
    transition: all 0.35s;
    background-color: $btn-hover-color;
    z-index: -1;
    content: "";
  }
  &:hover {
    color: #fff;
    border-color: $btn-hover-color;
    &::before {
      transform: translate(0, 0);
    }
  }
}

.btn-style509 {
  $btn-color: #716eef;
  $btn-hover-color: #4b48cb;
  position: relative;
  background-color: $btn-color;
  border-color: $btn-color;
  color: #fff;
  &::before,
  &::after {
    width: 49px;
    height: 35px;
    position: absolute;
    border-radius: 50%;
    background-color: $btn-hover-color;
    transition: all 1s ease;
    transform: scale(0);
    content: "";
    z-index: -1;
  }
  &::before {
    top: -8px;
    left: 10%;
  }
  &::after {
    bottom: -8px;
    right: 15%;
  }
  &:hover {
    background-color: $btn-hover-color;
    border-color: $btn-hover-color;
    &::before,
    &::after {
      transform: scale(1);
    }
  }
}

.btn-style510 {
  $btn-color: #5e5e5e;
  $btn-hover-color: #dd6395;
  position: relative;
  background-color: $btn-color;
  border-color: $btn-color;
  color: #fff;
  overflow: hidden;
  &::before,
  &::after {
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    transform: translateX(-100px) skewX(-15deg);
    content: "";
  }
  &::before {
    width: 60px;
    background: rgba(255, 255, 255, 0.5);
    filter: blur(30px);
    opacity: 0.5;
  }
  &::after {
    width: 30px;
    left: 30px;
    background: rgba(255, 255, 255, 0.2);
    filter: blur(5px);
  }
  &:hover {
    background-color: $btn-hover-color;
    border-color: $btn-hover-color;
    &::before {
      opacity: 1;
    }
    &::before,
    &::after {
      transform: translateX(300px) skewX(-15deg);
      transition: all 0.9s ease;
    }
  }
}

.btn-style511 {
  $btn-color: transparent;
  $btn-hover-color: #dd6395;
  position: relative;
  border-color: $btn-color;
  background-color: $btn-color;
  color: #484848;
  overflow: hidden;
  span {
    position: relative;
    z-index: 2;
  }
  &::before,
  &::after {
    width: 100%;
    height: 50%;
    position: absolute;
    left: 0;
    background-color: $btn-hover-color;
    transition: all 0.25s;
    content: "";
    z-index: 1;
  }
  &::before {
    top: 0;
    transform: translate(-100%, 0);
  }
  &::after {
    bottom: 0;
    transform: translate(100%, 0);
  }
  &:hover {
    color: #fff;
    &::before,
    &::after {
      transform: translate(0, 0);
    }
  }
}

.btn-style700 {
  $btn-color: #979695;
  $btn-hover-color: #dd6395;
  position: relative;
  border-color: $btn-color;
  color: $btn-color;
  &::before,
  &::after {
    position: absolute;
    top: 0;
    left: 0;
    border-color: $btn-hover-color;
    border-radius: $border-radius;
    border-style: solid;
    transition: all 0.35s;
    content: "";
    z-index: 1;
  }
  &::before {
    width: 0;
    height: 100%;
    border-width: 1px 0 1px 0;
  }
  &::after {
    width: 100%;
    height: 0;
    border-width: 0 1px 0 1px;
  }
  &:hover {
    border-color: $btn-hover-color;
    color: $btn-hover-color;
    &::before {
      width: 100%;
      border-width: 1px 0 1px 0;
    }
    &::after {
      height: 100%;
      border-width: 0 1px 0 1px;
    }
  }
}

.btn-style701 {
  $btn-color: #dd6395;
  $btn-hover-color: #dd2470;
  $size: 8px;
  $offset: 50%;
  position: relative;
  border: none;
  // border-color:$btn-color;
  color: $btn-color;
  span {
    width: 100%;
    display: block;
    position: relative;
  }
  &::before,
  &::after,
  span::before,
  span::after {
    width: $size;
    height: $size;
    position: absolute;
    transition: all 0.5s;
    border: 3px solid $btn-color;
    opacity: 0;
    content: "";
  }
  &::before {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
    transform: translate(-$offset, -$offset);
  }
  &::after {
    bottom: 0;
    left: 0;
    border-right: none;
    border-top: none;
    transform: translate(-$offset, $offset);
  }
  span::before {
    top: 0;
    right: 0;
    border-left: none;
    border-bottom: none;
    transform: translate($offset, -$offset);
  }
  span::after {
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: none;
    transform: translate($offset, $offset);
  }
  &:hover {
    font-size: 16.5px;
    color: $btn-hover-color;
    &::before,
    &::after,
    span::before,
    span::after {
      opacity: 1;
      border-color: $btn-hover-color;
      transform: translate(0%, 0%);
    }
  }
}

.btn-style702 {
  $btn-color: #716eef;
  position: relative;
  border-color: transparent;
  color: #fff;
  &::before,
  &::after {
    height: 100%;
    position: absolute;
    top: 0;
    transition: all 0.3s;
    content: "";
  }

  &::before {
    width: 100%;
    left: 0;
    border-radius: $border-radius;
    background-color: $btn-color;
    z-index: -1;
  }
  &::after {
    width: 0;
    left: 50%;
    border-top: 1px solid transparent;
    border-bottom: 1px solid transparent;
    transform: translate(-50%, 0);
    z-index: 1;
  }
  &:hover {
    color: $btn-color;
    &::before {
      transform: scale(0, 1);
    }
    &::after {
      width: 100%;
      border-color: $btn-color;
      transition-delay: 0.2s;
    }
  }
}

.btn-style703 {
  $btn-color: #dd7e2a;
  $transition-sec: 0.3;
  position: relative;
  background-color: $btn-color;
  border-color: $btn-color;
  color: #fff;
  &::before,
  &::after,
  span::before,
  span::after {
    width: 110%;
    height: 130%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    transition: all #{$transition-sec}s;
    border: 0px solid $btn-color;
    content: "";
  }
  &::before {
    border-top-width: 1px;
    transition-delay: #{$transition-sec}s;
    transform-origin: right top;
  }
  &::after {
    border-bottom-width: 1px;
    transition-delay: #{$transition-sec * 3}s;
    transform-origin: left bottom;
  }
  span {
    &::before {
      border-left-width: 1px;
      transition-delay: #{$transition-sec * 2}s;
      transform-origin: left top;
    }
    &::after {
      border-right-width: 1px;
      transform-origin: right bottom;
    }
  }
  &:hover {
    &::before,
    &::after,
    span::before,
    span::after {
      transform: translate(-50%, -50%) scale(1);
    }
  }
}

.btn-style900 {
  $btn-color: rgba(221, 99, 149, 1);
  $btn-hover-color: #dd2a73;
  position: relative;
  border-color: $btn-color;
  color: rgba(221, 99, 149, 1);
  transition-delay: 0.3s;
  overflow: hidden;
  &:hover {
    transform: translateY(-0.3em);
    border-color: $btn-hover-color;
    color: rgba(221, 99, 149, 0);
    transition-delay: 0s;
    &::before {
      opacity: 1;
      transform: translateX(0);
      transition-delay: 0.15s;
    }
  }
  &::before {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    content: attr(data-hover);
    color: $btn-color;
    text-align: center;
    transform: translateX(-60%);
    transition: all 0.4s;
    z-index: 1;
  }
}

.btn-style901 {
  $btn-color: #dd7e2a;
  position: relative;
  background-color: $btn-color;
  border-color: $btn-color;
  color: #fff;
  overflow: hidden;
  &::before {
    width: 25px;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    content: "\f054";
    font-family: "FontAwesome";
    font-weight: bold;
    font-size: 10px;
    color: #fff;
    text-indent: 5px;
    border-radius: 0 50% 50% 0;
    background-color: rgb(223 183 148 / 73%);
    transform: translate(-20%, 0) scale(0, 1);
    transform-origin: left center;
    transition: all 0.25s;
    z-index: 1;
  }
  &:hover {
    text-indent: 20px;
    &::before {
      transform: translate(-20%, 0) scale(1, 1);
    }
  }
}

.btn-style902 {
  $btn-color: #dd6395;
  position: relative;
  border-color: $btn-color;
  background-color: $btn-color;
  color: #fff;
  overflow: hidden;
  span[data-name="hover"] {
    display: inline-block;
    transition: all 0.25s;
    transform: translate(0, 0);
  }
  span[data-name="me"] {
    margin-left: 0.25em;
    transition: all 0.25s;
    opacity: 1;
  }
  .block {
    width: 30%;
    height: 100%;
    position: absolute;
    top: 0;
    left: -30%;
    background-color: rgba(237, 157, 190, 0.5);
    border-radius: 0 200% 200% 0;
    transition: all 0.25s;
    z-index: 1;
    span {
      display: block;
      &::before {
        content: "\f054";
        font-family: "FontAwesome";
      }
    }
  }
  &:hover {
    span[data-name="me"] {
      opacity: 0;
    }
    span[data-name="hover"] {
      transition-delay: 0.2s;
      transform: translate(1.5em, 0);
    }
    .block {
      transition-delay: 0.2s;
      left: 0;
    }
  }
}

.btn-style903 {
  $btn-color: #716eef;
  position: relative;
  border-color: $btn-color;
  color: $btn-color;
  &::before {
    width: 15px;
    height: 1px;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(0, -50%);
    transition: all 0.2s;
    transition-delay: 0.1s;
    background: $btn-color;
    content: "";
  }
  &:hover {
    background-color: $btn-color;
    color: #fff;
    &::before {
      left: 100%;
      transform: translate(-100%, -50%);
      background-color: #fff;
    }
  }
}

.btn-style904 {
  $btn-color: #dd7e2a;
  $arrow-background: rgb(223 183 148 / 73%);
  position: relative;
  background-color: $btn-color;
  border-color: $btn-color;
  color: #fff;
  overflow: hidden;
  span {
    position: relative;
    left: -0.5em;
    transition: all 0.25s;
  }
  &::before,
  &::after {
    height: 100%;
    position: absolute;
    right: 0;
    top: 0;
    background-color: $arrow-background;
    transition: all 0.25s;
    color: #fff;
  }
  &::before {
    width: 25px;
    content: "\f054";
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: "FontAwesome";
    font-size: 10px;
    font-weight: bold;
    text-indent: 5px;
    border-radius: 50% 0 0 50%;
    z-index: 1;
  }
  &::after {
    width: 100%;
    transform: translate(100%, 0);
    content: attr(data-hover);
    text-align: left;
    text-indent: 8px;
  }
  &:hover {
    border-color: $arrow-background;
    span {
      left: -100%;
    }
    &::before {
      right: 70%;
    }
    &::after {
      right: 70%;
    }
  }
}

.btn-style905 {
  $btn-color: #716eef;
  $btn-hover-color: #3936af;
  $btn-border-width: 5px;
  $btn-hover-radius: 20px;
  position: relative;
  background-color: $btn-color;
  border-width: $btn-border-width;
  border-color: $btn-color;
  color: #fff;
  box-sizing: border-box;
  &::before {
    width: 120%;
    height: 155%;
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: $btn-hover-radius;
    border: 1px solid $btn-hover-color;
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.1);
    transform-origin: center center;
    transition: all 0.25s;
    content: "";
  }
  &:hover {
    background-color: $btn-hover-color;
    border-color: $btn-color;
    border-style: inset;
    border-radius: $btn-hover-radius;
    &::before {
      opacity: 1;
      transform: translate(-50%, -50%) scale(1);
    }
  }
}

.btn-style906 {
  $btn-color: #bf7b7b;
  $btn-hover-color: #8b5252;
  position: relative;
  background: $btn-color;
  border-color: $btn-color;
  color: #fff;
  overflow: hidden;
  &::before {
    width: 0;
    height: 4.5px;
    position: absolute;
    bottom: 0;
    left: 0;
    background-color: #562424;
    transition: all 0.35s;
    content: "";
    z-index: 2;
  }
  &::after {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    border-radius: $border-radius;
    background-color: $btn-hover-color;
    transform: translate(0, -100%);
    transition: all 0.35s;
    content: attr(data-hover);
    z-index: 1;
  }
  &:hover {
    &::before {
      width: 100%;
    }
    &::after {
      transform: translate(0, 0);
    }
  }
}
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999px

Console