<section>
  <button class="button1">びゅんっ  &raquo;</button>
  <button class="button2">びよ〜ん</button>
  <button class="button3">ぷるん</button>
  <button class="button4">ぽんっ</button>
</section>
* {
  font-family: "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3", Meiryo;
  text-decoration: none;
  outline: none;
}

$font1: #fff;
$color1: #0082a9;
$base: #00a2d3;

[class^="button"] {
  &:hover {
    cursor: pointer;
  }
}

.button1 {
  font-size: 21px;
  color: $font1;
  line-height: 1;
  padding: 15px 20px;
  background-color: $color1;
  border: none;
  border-radius: 5px;
  transition: all .1s linear;
  &:hover {
    transition: all .25s cubic-bezier(0.10, 0.90, 0.30, 1.90);
    transform: translateX(12px);
  }
}

.button2 {
  font-size: 21px;
  color: $font1;
  line-height: 1;
  padding: 15px 20px;
  background-color: $color1;
  border: none;
  border-radius: 5px;
  transition: all .4s cubic-bezier(0.55, -1.30, 0.30, 2.80);
  &:hover {
    transform: scale(1.2);
  }
}

.button3 {
  font-size: 21px;
  color: $font1;
  line-height: 1;
  padding: 15px 20px;
  background-color: $color1;
  border: none;
  border-radius: 5px;
  &:hover {
    animation: gelatine .5s 1;
  }
}

.button4 {
  font-size: 21px;
  color: $font1;
  line-height: 1;
  width: 100px;
  height: 50px;
  background-color: $color1;
  border: none;
  border-radius: 5px;
  transition: none;
  position: relative;
  &:after {
    content: "";
    display: block;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 5px;
    border: 3px solid $color1;
    box-sizing: border-box;
    transition: all .1s linear;
  }
  &:hover:after {
    transition: all .25s cubic-bezier(0.50, 0.90, 0.30, 2.70);
    width: calc(100% + 15px);
    height: calc(100% + 15px);
  }
}

html,body {
  margin: 0;
  width: 100vw;
  min-width: 580px;
  height: 100vh;
  position: relative;
  background-color: $base;
}
section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 580px;
  transform: translate(-50%, -50%);
}

@keyframes gelatine{
  from,to{
    transform:scale(1, 1)
  }
  25%{
    transform:scale(.85, 1.15)
  }
  50%{
    transform:scale(1.1, .9)
  }75%{
    transform:scale(.9, 1.1)
  }
}
View Compiled

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.