/********* フォント（Google fonts） *********/
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@700&display=swap');
body {
  font-family: 'Noto Sans JP', sans-serif;
}

/********* Youtube埋め込みの横幅いっぱい *********/
.iframe-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* アスペクト比16:9の場合 */
    padding-top: 30px;
    height: 0;
    overflow: hidden;
    margin-bottom: 2rem; /* YouTubeの下に余白をつける */
}
.iframe-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/********* 吹き出し *********/
.header-title {
  background-color: #303030;
  color: #ffffff;
  padding: 10px;
  text-align: center;
}

/********* 吹き出し *********/
.balloon4 {
  position: relative;
  margin: 2em 0 2em 40px;
  padding: 15px;
  background: #fff0c6;
  border-radius: 30px;
}

.balloon4:before {  
  content: "";
  position: absolute;
  left: -38px;
  width: 13px;
  height: 12px;
  bottom: 0;
  background: #fff0c6;
  border-radius: 50%;
}

.balloon4:after {
  content: "";
  position: absolute;
  left: -24px;
  width: 20px;
  height: 18px;
  bottom: 3px;
  background: #fff0c6;
  border-radius: 50%;
}
.balloon4 p {
  margin: 0; 
  padding: 0;
}

/********* TOPへ戻るボタン *********/
#page_top{
  width: 90px;
  height: 90px;
  position: fixed;
  right: 0;
  bottom: 0;
  opacity: 0.6;
}
#page_top a{
  position: relative;
  display: block;
  width: 90px;
  height: 90px;
  text-decoration: none;
  color: #3f98ef;
}
#page_top a::before{
  font-family: 'Font Awesome 5 Free';
  font-weight: 900;
  content: '\f102';
  font-size: 25px;
  color: #3f98ef;
  position: absolute;
  width: 25px;
  height: 25px;
  top: -40px;
  bottom: 0;
  right: 0;
  left: 0;
  margin: auto;
  text-align: center;
}
#page_top a::after{
/*  content: 'PAGE TOP';*/
  font-size: 13px;
  color: #fff;
  position: absolute;
  top: 45px;
  bottom: 0;
  right: 0;
  left: 0;
  margin: auto;
  text-align: center;
  color: #3f98ef;
}