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HTML

              
                <head>
  <meta name="viewport" content="width=device-width,initial-scale=1.0">
  <!--==============レイアウトを制御する独自のCSSを読み込み===============-->
  <link rel="stylesheet" type="text/css" href="https://assets.codepen.io/6329135/reset.css">
</head>

<body>
  <div class="btn-position">
    <a href="#" class="btn btnarrow1">矢印が右に移動</a>
    <a href="#" class="btn btnarrow2">矢印が右に移動して現在地に戻る</a>
    <a href="#" class="btn btnarrow3">矢印が回転</a>
  </div>
</body>
              
            
!

CSS

              
                @charset "utf-8";

/*--- ボタン共通設定 ---*/

.btn {
  /*矢印の基点とするためrelativeを指定*/
  position: relative;

  /*ボタンの形状*/
  text-decoration: none;
  display: inline-block;
  background: #333;
  color: #fff;
  padding: 10px 40px 10px 30px;
  margin: 20px 0;

  font-size: max(14px, 2vw);
  white-space: nowrap;
  width: max(270px, 40vw); /*ボタンの横幅を全て統一*/

  border-radius: 25px;
  text-align: center;
  outline: none;

  /*アニメーションの指定*/
  transition: ease 0.2s;
}

.btn:hover {
  background: #555;
}

/* 矢印が右に移動 */
.btnarrow1::after {
  content: "";
  /*絶対配置で矢印の位置を決める*/
  position: absolute;
  top: 35%;
  right: 20px;
  /*矢印の形状*/
  width: 10px;
  height: 10px;
  border-top: 2px solid #fff;
  border-right: 2px solid #fff;
  transform: rotate(45deg);
  /*アニメーションの指定*/
  transition: all 0.3s;
}

/*hoverした際の移動*/
.btnarrow1:hover::after {
  right: 13px;
}

/* 矢印が右に移動して現在地に戻る */
.btnarrow2::after {
  content: "";
  /*絶対配置で矢印の位置を決める*/
  position: absolute;
  top: 35%;
  right: 20px;
  /*矢印の形状*/
  width: 10px;
  height: 10px;
  border-top: 2px solid #fff;
  border-right: 2px solid #fff;
  transform: rotate(45deg);
}

/*hoverした際のアニメーション*/
.btnarrow2:hover::after {
  animation: arrow 0.5s;
}

@keyframes arrow {
  50% {
    right: 10px;
  }
  100% {
    right: 20px;
  }
}

/* 矢印が回転 */
.btnarrow3::after {
  content: "";
  /*絶対配置で矢印の位置を決める*/
  position: absolute;
  top: 35%;
  right: 20px;
  /*矢印の形状*/
  width: 10px;
  height: 10px;
  border-top: 2px solid #fff;
  border-right: 2px solid #fff;
  transform: rotate(45deg);
  /*アニメーションの指定*/
  transition: all 0.3s;
}

/*hoverした際のアニメーション*/
.btnarrow3:hover::after {
  animation: arrowrotate 0.3s;
}

@keyframes arrowrotate {
  100% {
    transform: rotate(360deg);
  }
}
/*========= レイアウトのためのCSS ===============*/

body {
  width: 100%;
  height: 100vh;
  vertical-align: middle;
  padding: 30px 0;
  text-align: center;

  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;

  background-image: linear-gradient(
    103.3deg,
    rgba(252, 225, 208, 1) 30%,
    rgba(255, 173, 214, 1) 55.7%,
    rgba(162, 186, 245, 1) 81.8%
  );
}

/*ボタンの配置*/
.btn-position {
  display: flex;
  flex-direction: column;
  align-items: center;
}

p {
  margin: 0 0 10px 0;
}

              
            
!

JS

              
                
              
            
!
999px

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