/* リセットと基本スタイル */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Noto Serif JP", serif;
  line-height: 1.6;
  color: #fff;
  background-color: #000;
}

a {
  color: #6ab7ff;
  text-decoration: none;
  transition: all 0.3s ease;
}

a:hover {
  color: #a0d1ff;
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* ヘッダー */
.site-header {
  background-color: #000000;
  padding: 1rem 0;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.site-title a {
  color: #ffffff;
  font-size: 1.5rem;
  font-weight: bold;
  display: inline-block;
  padding: 0.5rem 1rem;
}

/* ヘッダー画像 */
#maingraphicband {
  width: 100%;
  position: relative;
}

.header-image img {
  width: 100%;
  display: block;
}

.header-image.mobile {
  display: none;
}

/* メインコンテンツ */
#contents {
  background-color: #000000;
  color: #ffffff;
}

article {
  padding: 2rem 5%;
  margin: 0 auto;
}

.ballet-bg {
  background: url(images/fieldballet_002.png) no-repeat center center;
  padding-bottom: 4rem;
}

/* 共通テキストスタイル */
.shippori {
  font-family: "Shippori Mincho", serif;
  font-weight: 400;
  font-style: normal;
  text-align: center;
  color: #ffffff;
  font-size: 1.4rem;
  line-height: 1.8;
}

.sale-date {
  margin: 0 0 20px 0;
  font-size: 1.6rem;
  font-weight: bold;
}

.main-title {
  text-align: center;
  margin: 80px 0 20px 0;
  font-size: 1.6rem;
  font-weight: bold;
}

.main-text {
  text-align: left;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.img-show {
  margin: 0 auto 40px auto;
  text-align: center;
}

.img-show img {
  max-width: 80%;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  border-radius: 5px;
}

/* スケジュール情報 */
.schedule-info, .benefits, .plan-details, .cautions {
  max-width: 800px;
  margin: 0 auto 40px;
  text-align: left;
}

.indent-5 {
  text-indent: -5em;
  padding-left: 5em;
}

.indent-3 {
  text-indent: -3em;
  padding-left: 3em;
}

.indent-1 {
  text-indent: -1em;
  padding-left: 1em;
}

.margin-top {
  margin-top: 15px;
}

.website-link {
  margin-top: 20px;
  text-align: center;
}

/* 予約ボタン */
.reservation-btn {
  background-color: #0066cc;
  color: #ffffff;
  padding: 10px 20px;
  margin-top: 10px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
}

.reservation-btn:hover {
  background-color: #004080;
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* 注意事項 */
.caution-title {
  text-align: center;
  margin: 40px 0 20px;
  font-size: 1.2rem;
}

/* フッター */
#footer-ground {
  text-align: center;
  margin-bottom: 2rem;
}

.site-footer {
  background-color: #000000;
  color: #fff;
  padding: 2rem 0;
  text-align: center;
}

.footer-text01 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.footer-text02 {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 1rem;
}

.social-icons {
  margin-bottom: 2rem;
}

.social-icons a {
  margin: 0 5px;
  display: inline-block;
  transition: transform 0.3s ease;
}

.social-icons a:hover {
  transform: translateY(-3px);
}

.credit {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

/* トップに戻るボタン */
.backtotop {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 999;
  background-color: rgba(0, 0, 0, 0.5);
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.backtotop a {
  color: #fff;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.backtotop:hover {
  background-color: rgba(0, 0, 0, 0.8);
  transform: translateY(-3px);
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
  .header-image.pc {
    display: none;
  }
  
  .header-image.mobile {
    display: block;
  }
  
  .shippori {
    font-size: 1.2rem;
    line-height: 1.6;
  }
  
  .main-title {
    margin: 50px 0 15px 0;
    font-size: 1.4rem;
  }
  
  .img-show img {
    max-width: 95%;
  }
  
  .indent-5, .indent-3 {
    text-indent: -2em;
    padding-left: 2em;
  }
  
  .reservation-btn {
    display: block;
    text-align: center;
    margin: 15px auto 0;
    max-width: 90%;
  }
}

@media (max-width: 480px) {
  .shippori {
    font-size: 1rem;
    line-height: 1.5;
  }
  
  .main-title {
    margin: 30px 0 10px 0;
    font-size: 1.2rem;
  }
  
  article {
    padding: 1rem 4%;
  }
  
  .sale-date {
    font-size: 1.2rem;
  }
  
  .indent-5, .indent-3, .indent-1 {
    text-indent: -1em;
    padding-left: 1em;
  }
  
  .social-icons img {
    height: 30px;
    width: auto;
  }
  
  .social-icons img[alt="YouTube"] {
    width: 70px;
    height: auto;
  }
}