body{
  width: 100%;
  color:#fff;
}
p {
  font-family: "Sawarabi Mincho", serif;
  font-weight: bold;
  font-style: normal;
  font-size: 16px;
  line-height: 1.9;
}
a{
  text-decoration: none;
}
.mb20 {
  margin-bottom: 20px;
}
.mb25 {
  margin-bottom: 25px;
}
header{
  background-color: black;
  padding:14px 20px;
  position: fixed;
  width: 450px;
}
header img {
  width:100px;
}
#contents{
  padding-top: 67px;
}
#wrapper{
  width: 450px;
  margin: 0 auto;
  background-color: #6d0000;
  background-image: url(../images/bg_old.webp);
  background-repeat: repeat;
  background-position: left top;
  background-size: auto;
}
.main_contents {
  padding: 20px;
}
h2 {
  margin: 15px 0;
  text-align: center;
  background-image: url(../images/h2.webp);
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  padding: 13px;
  font-family: "Sawarabi Mincho", serif;
  font-weight: 600;
  font-style: normal;
}
.message_box {
  background-color: rgb(38, 5, 5);
    border-radius: 5px;
    border-color: rgb(193, 153, 80);
    border-width: 1px;
    border-style: solid;
    align-items: center;
    padding: 20px;
    margin-bottom: 25px;
    font-size: 12px;
}
section:last-child{
  margin-bottom: 0;
}
h3 {
  font-size: 20px;
  margin-bottom: 10px;
  font-family: "Sawarabi Mincho", serif;
  font-weight: bold;
  font-style: normal;
  text-align: center;
}
.button_join {
  margin-bottom: 25px;
  background-image: url(../images/btn_main.webp);
  text-align: center;
  padding: 21px 0;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  font-size: 23px;
  font-weight: bold;
  width: 260px;
  margin: 0 auto;
  font-family: "Sawarabi Mincho", serif;
  font-weight: bold;
  font-style: normal;
}
.button_join a {
  text-decoration: none;
  width: 100%;
  height: auto;
  display: block;
}
.back {
  margin-bottom: 25px;
  background-image: url(../images/btn_sub.webp);
  text-align: center;
  padding: 25px 0;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  font-size: 18px;
  font-weight: bold;
  width: 260px;
  margin: 20px auto;
  font-family: "Noto Sans JP", sans-serif;
  font-weight: normal;
  font-style: normal;
}
.back a {
  text-decoration: none;
  width: 100%;
  height: auto;
  display: block;
}
.big_text{
  font-size: 25px;
}
.small_text {
  font-size: 12px;
}
.align_c {
  text-align: center;
}
section {
  margin-bottom: 60px;
}
footer {
  padding: 20px;
  background-color: black;
  font-size: 13px;
  font-family: "M PLUS Rounded 1c", sans-serif;
  font-weight: 400;
  font-style: normal;
  line-height: 3.4;
}
footer a {
  text-decoration: underline;
}
.attention {
  font-family: "Noto Sans JP", sans-serif;
  font-optical-sizing: auto;
  font-weight: normal;
  font-style: normal;
  font-size: 12px;
}
.question h3{
    font-size: 33px;
    text-align: center;
    color: #fff;
    margin: 15px 0;
    font-family: system-ui, sans-serif;
    font-weight: bold;
    font-style: normal;
}
.question p{
    font-size: 22px;
    color: #fff;
    margin-bottom: 25px;
    font-family: system-ui, sans-serif;
    font-weight: bold;
    font-style: normal;
    line-height: 1.6;
}
.question .explanation{
  font-size: 18px;
}
.button {
  display: block;
  padding: 5px 8px;
  height: 50px;
  width: 360px;
  color: rgb(255, 255, 255);
  background-color: rgb(38 5 5 / 85%);
  border-radius:100px;
  border:2px rgb(193, 153, 80) solid;
  margin: 0 auto 15px;
  text-align: center;
  font-family: system-ui, sans-serif;
  font-weight: bold;
  font-style: normal;
  font-size: 18px;
}
a .button {
  text-decoration: none;
}
.youtube {
  margin-bottom: 20px;
}
.no_fontsytle {
  font-family: system-ui, sans-serif;
}


/* スマホ向け */

/* 600px以上 */
@media screen and (max-width: 450px) {
  #wrapper { 
    width:100%;
  }
  body {
    padding: 0;
  }
}