@charset "UTF-8";
html, body {
    margin: 0;
    padding: 0;
    background-color: whitesmoke;
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN","Hiragino Sans", "Noto Sans", Meiryo, sans-serif;
}

nav {
    padding: 15px;
    box-sizing: border-box;
    font-size: 25px;
    width: 100%;
}

.header {
    width: 100%;
    height: 2em;
}

#header {
    background-color: white;
    padding: 0.3em;
    box-sizing: border-box;
    border-radius: 10px;
}

.head {
    /* ヘッダーの浮かせる設定 */
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10;
}


.subsc {
    width: 200px;
    height: 200px;
    padding-top: calc(100px - 0.8em);
    box-sizing: border-box;
    text-align: center;
    border-radius: 50%;
    background-color: white;
    font-size: 25px;
    margin-left: 50%;
    position: relative;
    left: -100px;
}



/* アニメーション */
.target {
    animation: floating-y 1.3s ease-in-out infinite alternate-reverse;
  }
  @keyframes floating-y {
    0% {
      transform: translateY(-2%);
    }
    100% {
      transform: translateY(2%);
    }
  }