/********************************************
［基本設定］
*********************************************/
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "ヒラギノ角ゴ Pro W3", "メイリオ", sans-serif;
  color: #2c3e50;
  background-color: #e8f8f5;
  line-height: 1.6;
}

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

a {
  text-decoration: none;
  color: inherit;
}

.container {
  width: 90%;
  max-width: 1000px;
  margin: 0 auto;
}

/********************************************
［ヘッダー］
*********************************************/
.header {
  background-color: #2bbd9b;
  color: #ffffff;
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.header-inner {
  width: 90%;
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 22px;
  letter-spacing: 1px;
}

.nav ul {
  display: flex;
  list-style: none;
}

.nav li {
  margin-left: 20px;
}

.nav a {
  color: #ffffff;
  font-size: 15px;
  font-weight: bold;
}

/********************************************
［ハンバーガーボタン基本スタイル（PCでは非表示）］
*********************************************/
.burger-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 30px;
  height: 24px;
  position: relative;
  z-index: 110;
}

/* 三本線のスタイル */
.burger-btn span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #ffffff;
  border-radius: 2px;
  position: absolute;
  left: 0;
  transition: all 0.3s ease;
}

.burger-btn span:nth-child(1) {
  top: 0;
}
.burger-btn span:nth-child(2) {
  top: 10px;
}
.burger-btn span:nth-child(3) {
  top: 20px;
}

/* ボタンが開いた時（×印に変形） */
.burger-btn.active span:nth-child(1) {
  top: 10px;
  transform: rotate(45deg);
}

.burger-btn.active span:nth-child(2) {
  opacity: 0;
}

.burger-btn.active span:nth-child(3) {
  top: 10px;
  transform: rotate(-45deg);
}

/*********************************************
［メインビジュアル（HERO）］
*********************************************/
.hero {
  position: relative;
  background-color: #d1f2eb;
  text-align: center;
  padding-bottom: 50px;
}

.hero-image img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  display: block;
}

.hero-content {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  width: 90%;
  max-width: 800px;
  margin: -40px auto 0;
  padding: 35px 20px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 10px 30px rgba(43, 189, 155, 0.15);
  position: relative;
  z-index: 10;
}

/* 期間限定ラベル */
.badge {
  display: inline-block;
  background-color: #ff6b81;
  color: #ffffff;
  font-size: 13px;
  font-weight: bold;
  letter-spacing: 1px;
  padding: 4px 14px;
  border-radius: 4px;
  margin-bottom: 15px;
  box-shadow: none;
}

.hero-content h2 {
  font-size: 24px;
  background: linear-gradient(135deg, #16a085 0%, #2bbd9b 50%, #a3e4d7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 2px 10px rgba(43, 189, 155, 0.3);
  margin-bottom: 12px;
}

.hero-content p {
  font-size: 16px;
  color: #555;
  margin-bottom: 25px;
}

/********************************************
［ボタン（CTA）］
*********************************************/
.btn-cta {
  display: inline-block;
  background-color: #ff5252;
  color: #ffffff;
  font-size: 18px;
  font-weight: bold;
  padding: 15px 35px;
  border-radius: 30px;
  border-bottom: 4px solid #d63031;
  letter-spacing: 1px;
  box-shadow: 0 4px 12px rgba(255, 82, 82, 0.25);
  transition:
    transform 0.3s cubic-bezier(0.25, 1, 0.5, 1),
    box-shadow 0.3s ease,
    background-color 0.3s ease;
  will-change: transform;
}

.btn-cta:hover {
  transform: translateY(-3px);
  border-bottom: 4px solid #d63031;
  box-shadow: 0 8px 20px rgba(255, 82, 82, 0.4);
}

.btn-cta:active {
  transform: translateY(1px);
  border-bottom: 2px solid #d63031;
}

/********************************************
［セクション共通］
*********************************************/
.section {
  padding: 60px 0;
}

.section-bg {
  background-color: #ffffff;
}

.section-title {
  text-align: center;
  font-size: 28px;
  color: #16a085;
  margin-bottom: 40px;
  position: relative;
  display: block;
}

.section-title::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background-color: #2bbd9b;
  margin: 10px auto 0;
  border-radius: 2px;
}

.access-card,
.notes-card,
.faq-item {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.faq-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(43, 189, 155, 0.12);
}
/********************************************
［1. イベント概要］
*********************************************/
.about-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.about-text {
  width: 58%;
  font-size: 16px;
}

.about-text p {
  margin-bottom: 15px;
}

.about-img {
  width: 38%;
  text-align: center;
}

.about-img img {
  border-radius: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

/********************************************
［2. 注目メニュー］
*********************************************/
.card-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.card {
  width: 48%;
  background-color: rgba(232, 248, 245, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 25px;
  border: 1px solid rgba(163, 228, 215, 0.6);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  transition:
    transform 0.35s cubic-bezier(0.25, 1, 0.5, 1),
    box-shadow 0.35s ease,
    border-color 0.35s ease;
  will-change: transform;
}

/* ホバー時の浮遊エフェクト */
.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 25px rgba(43, 189, 155, 0.2);
  border-color: #2bbd9b;
}

/* 画像にズームイン効果を追加 */
.card-img-wrapper {
  overflow: hidden;
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover img {
  transform: scale(1.05);
}

.card-body {
  padding: 20px;
}

.card-body h3 {
  font-size: 18px;
  color: #16a085;
  margin-bottom: 8px;
}

.card-body p {
  font-size: 14px;
  color: #555;
  line-height: 1.6;
}

/********************************************
［3. 会場案内・アクセス］
*********************************************/
.access-card {
  background-color: #ffffff;
  border: 3px solid #2bbd9b;
  border-radius: 20px;
  padding: 30px;
}

.access-card h3 {
  font-size: 22px;
  color: #16a085;
  border-bottom: 2px solid #a3e4d7;
  padding-bottom: 10px;
  margin-bottom: 20px;
}

.info-list {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 25px;
}

.info-list dt {
  width: 25%;
  font-weight: bold;
  color: #16a085;
  padding: 12px 0;
  border-bottom: 1px dashed #a3e4d7;
}

.info-list dd {
  width: 75%;
  padding: 12px 0;
  border-bottom: 1px dashed #a3e4d7;
}

.access-cta {
  text-align: center;
  margin-top: 20px;
}

/********************************************
［4. 注意事項（Notes）］
*********************************************/
.section-notes {
  background-color: #ffffff;
}

.notes-card {
  background-color: #e8f8f5;
  border: 2px dashed #ff6b81;
  border-radius: 15px;
  padding: 25px 30px;
}

.notes-card ul {
  list-style-type: disc;
  padding-left: 20px;
}

.notes-card li {
  font-size: 15px;
  color: #555;
  margin-bottom: 10px;
  line-height: 1.6;
}

.notes-card li:last-child {
  margin-bottom: 0;
}
/********************************************
［5. よくある質問（FAQ）］
*********************************************/
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: #ffffff;
  border-radius: 12px;
  margin-bottom: 15px;
  border: 1px solid #a3e4d7;
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.faq-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(43, 189, 155, 0.15);
}

/* 質問ボタン（全体を左揃え・右端に+ボタン配置） */
button.faq-q {
  width: 100%;
  background: none;
  border: none;
  outline: none;
  font-family: inherit;
  cursor: pointer;
  font-size: 17px;
  font-weight: bold;
  color: #16a085;
  padding: 20px;
  padding-right: 50px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  position: relative;
  text-align: left;
}

.faq-q > span:first-child {
  background-color: #2bbd9b;
  color: #ffffff;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  font-size: 15px;
  flex-shrink: 0;
}

/* 右端の ＋ / － アイコン */
.faq-icon {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background-color: #2bbd9b;
  border-radius: 2px;
  transition: transform 0.3s ease;
}

/* 横線 */
.faq-icon::before {
  top: 7px;
  left: 0;
  width: 100%;
  height: 2px;
}

/* 縦線 */
.faq-icon::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 100%;
}

/* 開いた状態 */
.faq-q.active .faq-icon::after {
  transform: rotate(90deg);
}

/* 回答 */
.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s cubic-bezier(0.25, 1, 0.5, 1);
  background-color: rgba(232, 248, 245, 0.5);
}

.faq-a.open {
  grid-template-rows: 1fr;
}

.faq-a-inner {
  overflow: hidden;
  padding: 0 20px;
  font-size: 15px;
  color: #444;
  line-height: 1.6;
  transition: padding 0.35s ease;
}

.faq-a.open .faq-a-inner {
  padding: 15px 20px 20px 20px;
}

/* Aのマーク設定 */
.faq-a-inner span {
  color: #ff6b81;
  font-weight: bold;
}

/********************************************
［6. SNSシェアボタン］
*********************************************/
.section-share {
  text-align: center;
  padding: 40px 0;
}

.share-title {
  font-size: 18px;
  font-weight: bold;
  color: #16a085;
  margin-bottom: 20px;
}

.share-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
}

.btn-share {
  display: inline-block;
  color: #ffffff;
  font-size: 15px;
  font-weight: bold;
  padding: 12px 25px;
  border-radius: 25px;
  transition: opacity 0.3s;
}

.btn-share:hover {
  opacity: 0.85;
}

.btn-x {
  background-color: #000000;
}

.btn-line {
  background-color: #06c755;
}

/********************************************
［フッター］
*********************************************/
.footer {
  background-color: #2bbd9b;
  color: #ffffff;
  text-align: center;
  padding: 20px 0;
  font-size: 14px;
}

/********************************************
［TOPに戻るボタン］
*********************************************/
.page-top {
  position: fixed;
  bottom: 30px;
  right: 20px;
  width: 48px;
  height: 48px;
  background-color: #2bbd9b;
  color: #ffffff;
  font-size: 20px;
  font-weight: bold;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

/* スクロールされた時に付与するクラス */
.page-top.active {
  opacity: 1;
  visibility: visible;
}

.page-top:hover {
  background-color: #16a085;
  transform: translateY(-3px);
}
/********************************************
［レスポンシブ設定（タブレット＆スマホ：1024px以下）］
*********************************************/
@media screen and (max-width: 1024px) {
  .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  /* ハンバーガーボタンを表示 */
  .burger-btn {
    display: block;
  }

  .burger-btn span {
    background-color: #ffffff;
  }

  .burger-btn.active span {
    background-color: #16a085;
  }

  /* ナビゲーション */
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    /* background-color: rgba(43, 189, 155, 0.7); */
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding-top: 80px;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease;
    z-index: 100;
  }

  /* 開いた状態 */
  .nav.active {
    right: 0;
  }

  /* メニューの縦並びスタイル */
  .nav ul {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 30px;
  }

  .nav li {
    margin: 0 0 25px 0;
  }

  .nav a {
    font-size: 18px;
    color: #16a085;
  }
}

/********************************************
［レスポンシブ対応（スマホ）］
*********************************************/
@media screen and (max-width: 768px) {
  .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .hero-content h2 {
    font-size: 24px;
    background: linear-gradient(135deg, #0e6655 0%, #16a085 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
    font-weight: 800;
  }

  .about-flex {
    flex-direction: column;
  }

  .about-text,
  .about-img {
    width: 100%;
    margin-bottom: 20px;
  }

  .card {
    width: 100%;
  }

  .info-list dt,
  .info-list dd {
    width: 100%;
  }

  .info-list dt {
    border-bottom: none;
    padding-bottom: 0;
  }

  .share-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn-share {
    width: 80%;
  }

  .faq-a {
    padding-left: 0;
    margin-top: 8px;
  }
}