/* =====================
   リセット・基本設定
===================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --teal:       #2a9db5;
  --teal-dark:  #1a7a8a;
  --teal-light: #c8e6f0;
  --gold:       #b8922a;
  --gold-light: #d4ac45;
  --white:      #ffffff;
  --card-bg:    #f8fbfd;
  --border:     #5bbdd0;
  --text:       #1a3a40;
  --text-light: #4a7a85;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

.teal { color: var(--teal); }
.gold { color: var(--gold); }

/* =====================
   ナビゲーション
===================== */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--teal-light);
  box-shadow: 0 2px 12px rgba(42,157,181,0.1);
}

.nav {
  max-width: 1100px; margin: 0 auto;
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}

.nav-logo { font-weight: 900; font-size: 1.2rem; color: var(--teal); }

.nav-links {
  display: flex; gap: 28px; list-style: none; align-items: center;
}
.nav-links a { text-decoration: none; color: var(--text); font-size: 0.95rem; transition: color .2s; }
.nav-links a:hover { color: var(--teal); }

.btn-nav {
  background: var(--teal); color: var(--white) !important;
  padding: 8px 20px; border-radius: 24px;
  font-weight: 700; transition: background .2s !important;
}
.btn-nav:hover { background: var(--teal-dark) !important; }

.nav-toggle { display: none; background: none; border: none; font-size: 1.6rem; cursor: pointer; color: var(--teal); }

/* =====================
   ヒーロー
===================== */
.hero {
  padding: 72px 24px 64px;
  text-align: center;
  background: linear-gradient(180deg, var(--teal-light) 0%, var(--white) 100%);
}

.hero-sub {
  display: inline-block;
  background: var(--teal); color: var(--white);
  padding: 6px 20px; border-radius: 20px;
  font-size: 0.9rem; font-weight: 700; margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(1.4rem, 4vw, 2.8rem);
  font-weight: 900;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 32px;
}

.hero-title .gold { font-size: 1.1em; }

.hero-collage {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 0 auto 32px;
  max-width: 960px;
  border-radius: 16px;
  overflow: hidden;
}

.hero-collage img {
  width: 100%; height: 220px;
  object-fit: cover;
  display: block;
  transition: transform .3s;
}
.hero-collage img:hover { transform: scale(1.04); }

.hero-desc {
  font-size: 1.1rem; color: var(--text-light);
  margin-bottom: 40px; line-height: 1.8;
}

.btn-primary {
  display: inline-block;
  background: var(--gold); color: var(--white);
  padding: 16px 48px; border-radius: 40px;
  font-size: 1.1rem; font-weight: 900;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(184,146,42,0.4);
  transition: transform .2s, box-shadow .2s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(184,146,42,0.5); }

/* =====================
   セクション共通
===================== */
section { padding: 80px 0; }

.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 900;
  margin-bottom: 56px;
  color: var(--text);
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 60px; height: 3px;
  background: var(--gold);
  margin: 12px auto 0;
  border-radius: 2px;
}

/* =====================
   特徴（5つのこと）
===================== */
.features { background: var(--teal-light); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: 20px;
  padding: 36px 28px;
  position: relative;
  box-shadow: 0 4px 16px rgba(42,157,181,0.1);
  transition: transform .2s, box-shadow .2s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 8px 28px rgba(42,157,181,0.18); }

.feature-num {
  width: 48px; height: 48px;
  background: var(--teal); color: var(--white);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; font-weight: 900;
  margin-bottom: 16px;
}

.feature-card h3 { font-size: 1.3rem; color: var(--teal); margin-bottom: 12px; font-weight: 900; }
.feature-card p  { color: var(--text-light); font-size: 0.95rem; margin-bottom: 20px; }

.feature-tag {
  background: var(--teal); color: var(--white);
  padding: 8px 16px; border-radius: 12px;
  font-size: 0.85rem; font-weight: 700;
  display: inline-block;
}

/* =====================
   動画ギャラリー
===================== */
.videos { background: var(--teal-light); }

.videos-desc {
  text-align: center;
  color: var(--text-light);
  margin-top: -36px;
  margin-bottom: 40px;
  font-size: 1rem;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
  transition: opacity 0.3s;
}

.video-item {
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  aspect-ratio: 9/16;
  box-shadow: 0 4px 16px rgba(42,157,181,0.15);
}

.video-item iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.videos-action {
  text-align: center;
}

.btn-shuffle {
  background: var(--teal);
  color: var(--white);
  border: none;
  padding: 14px 40px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background .2s, transform .2s;
  box-shadow: 0 4px 16px rgba(42,157,181,0.3);
}
.btn-shuffle:hover {
  background: var(--teal-dark);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
}

/* =====================
   ギャラリー
===================== */
.gallery { background: var(--white); }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 16px;
}

.gallery-item {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(42,157,181,0.15);
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .3s;
  min-height: 220px;
}
.gallery-item:hover img { transform: scale(1.04); }

.gallery-large {
  grid-row: span 2;
}

.gallery-wide {
  grid-column: span 2;
}

.gallery-caption {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(26,122,138,0.85));
  color: #fff;
  padding: 24px 16px 12px;
  font-size: 0.9rem;
  font-weight: 700;
}

@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }
  .gallery-large { grid-row: span 1; }
  .gallery-wide  { grid-column: span 2; }
}

/* =====================
   おすすめ
===================== */
.info-section { background: var(--white); }

.recommend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.recommend-item {
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: 14px;
  padding: 20px 24px;
  font-weight: 700; font-size: 1rem;
  color: var(--teal-dark);
  transition: background .2s;
}
.recommend-item:hover { background: var(--teal-light); }

/* =====================
   日程・場所
===================== */
.schedule { background: var(--teal-light); }

.schedule-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.schedule-info { display: flex; flex-direction: column; gap: 20px; }

.schedule-item {
  display: flex; align-items: flex-start; gap: 16px;
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: 14px;
  padding: 20px 24px;
}
.schedule-icon { font-size: 1.8rem; flex-shrink: 0; }
.schedule-item strong { display: block; color: var(--teal); font-size: 1rem; margin-bottom: 4px; }
.schedule-item p { color: var(--text); font-size: 1.1rem; font-weight: 700; }

.schedule-map iframe { box-shadow: 0 4px 20px rgba(42,157,181,0.2); }

/* =====================
   体験入会
===================== */
.trial { background: var(--white); }

.trial-card {
  background: linear-gradient(135deg, var(--teal) 0%, var(--teal-dark) 100%);
  border-radius: 28px;
  padding: 64px 40px;
  text-align: center;
  color: var(--white);
  box-shadow: 0 8px 40px rgba(42,157,181,0.35);
}

.trial-inner {
  display: flex; align-items: center; gap: 40px;
}
.trial-text { flex: 1; text-align: center; padding: 0 32px; }
.trial-photo {
  flex: 0 0 300px;
  border-radius: 20px; overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
}
.trial-photo img { width: 100%; height: auto; object-fit: contain; display: block; }

.trial-card h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 900; margin-bottom: 20px; }
.trial-card p  { font-size: 1.05rem; opacity: 0.92; margin-bottom: 36px; line-height: 1.8; }

.btn-line {
  display: inline-flex; align-items: center;
  background: #06c755; color: var(--white);
  padding: 16px 48px; border-radius: 40px;
  font-size: 1.1rem; font-weight: 900;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(6,199,85,0.4);
  transition: transform .2s, box-shadow .2s;
}
.btn-line:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(6,199,85,0.5); }

.trial-note { font-size: 0.8rem; opacity: 0.6; margin-top: 16px; margin-bottom: 0; }

/* =====================
   FAQ
===================== */
.faq { background: var(--teal-light); }

.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }

.faq-item {
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 700; font-size: 1rem;
  color: var(--teal-dark);
  cursor: pointer;
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::after { content: '＋'; color: var(--gold); font-size: 1.3rem; flex-shrink: 0; }
.faq-item[open] summary::after { content: '－'; }
.faq-item summary::-webkit-details-marker { display: none; }

.faq-item p {
  padding: 0 24px 20px;
  color: var(--text-light);
  font-size: 0.95rem;
  border-top: 1px solid var(--teal-light);
  padding-top: 16px;
}

/* =====================
   フッター
===================== */
.footer {
  background: var(--teal-dark);
  color: var(--white);
  padding: 48px 24px;
  text-align: center;
}

.footer-logo { font-size: 1.4rem; font-weight: 900; margin-bottom: 12px; }
.footer p { opacity: 0.8; font-size: 0.9rem; margin-bottom: 20px; }

.footer-links { display: flex; gap: 24px; justify-content: center; margin-bottom: 24px; flex-wrap: wrap; }
.footer-links a {
  color: var(--white); text-decoration: none;
  border: 1px solid rgba(255,255,255,0.4);
  padding: 8px 20px; border-radius: 20px;
  font-size: 0.9rem; transition: background .2s;
}
.footer-links a:hover { background: rgba(255,255,255,0.15); }

.footer-copy { opacity: 0.5; font-size: 0.8rem; margin-bottom: 0 !important; }

/* =====================
   レスポンシブ
===================== */
@media (max-width: 768px) {
  .hero-collage { grid-template-columns: repeat(2, 1fr); }
  .hero-collage img { height: 160px; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--white);
    padding: 20px 24px;
    border-bottom: 2px solid var(--teal-light);
    gap: 16px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }

  .schedule-grid { grid-template-columns: 1fr; }
  .trial-card { padding: 48px 24px; }
  .trial-inner { flex-direction: column; }
  .trial-text { text-align: center; }
  .trial-photo { flex: none; width: 100%; max-width: 320px; }
  .features-grid { grid-template-columns: 1fr; }
}