body {
  font-family: "Noto Sans JP", serif;
  font-optical-sizing: auto;
  font-weight: weight;
  font-style: normal;
  background-color: black;
  color: #ffffff;
}

@media screen and (max-width: 767px) {
  body {
    width: 460px;
  }
}

/* ヘッダー */
header .container {
  height: 100px;
  display: flex;
  justify-content: space-between;
}
header ul {
  font-weight: 500;
  font-size: 22px;
  margin-top: 20px;
}
ul :hover {
  color: #ba55d3;
  transition: 0.15s;
}

.member {
  margin-top: 30px;
}
.member h1 {
  text-align: center;
}
.member .content {
  display: flex;
  justify-content: center;
}
.content ul {
  display: flex;
}
.content li {
  margin: 20px;
}

header li {
  margin-right: 50px;
}

@media screen and (max-width: 767px) {
  header .container {
    display: block; /* flexを解除 */
    justify-content: normal; /* space-betweenをリセット */
  }
  header img {
    width: 460px;
    position: fixed;
    z-index: 999;
  }
  header ul {
    margin-top: 0;
    padding-top: 115px;
    font-size: 20px;
    font-weight: 500;
  }
}

/* めいん */
main h1 {
  font-size: 50px;
  background-color: #9932cc;
  margin: 0 20%;
  text-align: center;
  margin-top: 30px;
  padding: 20px 0;
  border-radius: 50px;
}

main .main_text {
  color: #ffffff;
  font-size: 25px;
  text-align: center;
  line-height: 80px;
}

main .main_img {
  text-align: center;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 40px;
}

main .back {
  text-decoration: none;
  color: #ffffff;
  border: #ffffff solid 2px;
  font-size: 25px;
  font-weight: 500;
  text-align: center;
  background-color: #9932cc;
  margin: 30px 46%;
  display: inline-block;
  padding: 10px 20px;
  border-radius: 50px;
  transition: all 0.3s;  
  white-space: nowrap;
}

main .back:hover {
  background-color: #ba55d3;
  color: #ffffff;
  transform: scale(1.05);
}

@media screen and (max-width: 767px) {
  main h1 {
    font-size: 30px;
    margin: 100px 40px 0 40px;
  }
  main .main_text {
    font-size: 20px;
    line-height: 50px;
  }
  main img {
    width: 450px;
  }
  main .back {
    font-size: 20px;
    padding: 5px 10px;
    margin: 30px auto;
    display: block;
    width: fit-content;
  }
}
/* フッター */
footer {
  background-color: #9932cc;
  margin-top: 30px;
  padding-top: 30px;
  height: 120px;
}
footer .container {
  display: flex;
  flex-wrap: wrap;
}
footer .sns {
  flex: 1 1 calc(25% - 20px);
  box-sizing: border-box;
  text-align: center;
}

footer small {
  display: block;
  text-align: center;
  margin-top: 20px;
}