/* ===== Yoga Go — スタイルシート ===== */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Zen+Kaku+Gothic+New:wght@300;400;500;700&display=swap');

:root {
  --sunset: #e07a5f;
  --sunset-dark: #c2664d;
  --sunset-light: #f4a582;
  --indigo: #3d405b;
  --indigo-light: #545775;
  --sage: #81b29a;
  --sage-dark: #6a9a82;
  --cream: #f4f1de;
  --cream-dark: #e8e4cc;
  --sand: #f2cc8f;
  --white: #ffffff;
  --off-white: #faf9f6;
  --charcoal: #2d2d2d;
  --warm-gray: #6b6b6b;
  --light-gray: #e5e5e5;
  --font-display: 'Playfair Display', serif;
  --font-body: 'Zen Kaku Gothic New', sans-serif;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.1);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-full: 9999px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--charcoal); background: var(--off-white); line-height: 1.7; font-weight: 400; -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4, h5 { font-family: var(--font-display); line-height: 1.2; font-weight: 600; color: var(--indigo); }
a { text-decoration: none; color: inherit; transition: color 0.3s; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ===== ユーティリティ ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-warm { background: var(--cream); }
.section-dark { background: var(--indigo); color: var(--white); }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark .subtitle { color: var(--white); }
.section-dark p { color: rgba(255,255,255,0.85); }
.subtitle { display: inline-block; font-family: var(--font-body); font-size: 0.8rem; font-weight: 500; letter-spacing: 3px; text-transform: uppercase; color: var(--sunset); margin-bottom: 12px; }
.section-title { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 16px; }
.section-desc { font-size: 1.05rem; color: var(--warm-gray); max-width: 600px; line-height: 1.8; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ===== ボタン ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 32px; border-radius: var(--radius-full); font-family: var(--font-body); font-size: 0.9rem; font-weight: 500; border: none; cursor: pointer; transition: all 0.3s; text-decoration: none; }
.btn-primary { background: var(--sunset); color: var(--white); }
.btn-primary:hover { background: var(--sunset-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(224,122,95,0.35); }
.btn-outline { background: transparent; color: var(--indigo); border: 2px solid var(--indigo); }
.btn-outline:hover { background: var(--indigo); color: var(--white); }
.btn-white { background: var(--white); color: var(--indigo); }
.btn-white:hover { background: var(--cream); transform: translateY(-2px); }
.btn-sage { background: var(--sage); color: var(--white); }
.btn-sage:hover { background: var(--sage-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(129,178,154,0.35); }
.btn-sm { padding: 10px 24px; font-size: 0.85rem; }

/* ===== ヘッダー ===== */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(250,249,246,0.92); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(0,0,0,0.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-icon { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--sunset), var(--sand)); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 1.3rem; color: var(--white); font-weight: 700; }
.logo-text { font-family: var(--font-display); font-size: 1.4rem; font-weight: 600; color: var(--indigo); }
.logo-sub { font-size: 0.65rem; letter-spacing: 2px; text-transform: uppercase; color: var(--warm-gray); display: block; margin-top: -2px; }

.nav-desktop { display: flex; align-items: center; gap: 32px; }
.nav-desktop a { font-size: 0.9rem; font-weight: 500; color: var(--warm-gray); transition: color 0.3s; }
.nav-desktop a:hover, .nav-desktop a.active { color: var(--sunset); }

.mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--indigo); }
.mobile-nav { display: none; background: var(--white); border-top: 1px solid var(--light-gray); }
.mobile-nav a { display: block; padding: 16px 24px; font-size: 1rem; color: var(--warm-gray); border-bottom: 1px solid var(--light-gray); }
.mobile-nav a:hover, .mobile-nav a.active { color: var(--sunset); background: var(--cream); }
.mobile-nav.open { display: block; }

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .mobile-menu-btn { display: block; }
}

/* ===== ヒーロー ===== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; background: var(--indigo); }
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.5; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(61,64,91,0.85) 0%, rgba(61,64,91,0.4) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 650px; padding: 120px 0 80px; }
.hero-content .subtitle { color: var(--sand); }
.hero-content h1 { font-size: clamp(2.8rem, 6vw, 4.5rem); color: var(--white); margin-bottom: 20px; line-height: 1.1; }
.hero-content p { font-size: 1.15rem; color: rgba(255,255,255,0.85); margin-bottom: 32px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.2); }
.hero-stat { text-align: center; }
.hero-stat-number { font-family: var(--font-display); font-size: 2rem; font-weight: 700; color: var(--sand); }
.hero-stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.7); margin-top: 4px; }

@media (max-width: 768px) {
  .hero-stats { gap: 24px; }
  .hero-content { padding: 140px 0 60px; }
}

/* ===== アバウト ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-img img { width: 100%; height: 500px; object-fit: cover; }
.about-text .subtitle { color: var(--sunset); }
.about-text h2 { margin-bottom: 20px; }
.about-text p { color: var(--warm-gray); margin-bottom: 16px; }
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 32px; }
.about-value { display: flex; align-items: flex-start; gap: 12px; }
.about-value-icon { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--sunset-light), var(--sunset)); display: flex; align-items: center; justify-content: center; color: var(--white); font-size: 1.1rem; flex-shrink: 0; }
.about-value h4 { font-size: 0.95rem; margin-bottom: 4px; }
.about-value p { font-size: 0.85rem; color: var(--warm-gray); }

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-values { grid-template-columns: 1fr; }
}

/* ===== クラス ===== */
.classes-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.class-card { background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: all 0.4s; }
.class-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.class-card-img { position: relative; height: 240px; overflow: hidden; }
.class-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.class-card:hover .class-card-img img { transform: scale(1.08); }
.class-card-badge { position: absolute; top: 16px; left: 16px; padding: 6px 14px; border-radius: var(--radius-full); background: var(--sunset); color: var(--white); font-size: 0.75rem; font-weight: 500; }
.class-card-body { padding: 24px; }
.class-card-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
.class-card-body p { font-size: 0.9rem; color: var(--warm-gray); margin-bottom: 16px; }
.class-card-meta { display: flex; gap: 16px; font-size: 0.8rem; color: var(--warm-gray); }
.class-card-meta span { display: flex; align-items: center; gap: 4px; }

@media (max-width: 1024px) { .classes-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .classes-grid { grid-template-columns: 1fr; } }

/* ===== ステップ ===== */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 48px; }
.step-card { text-align: center; padding: 40px 24px; }
.step-number { width: 64px; height: 64px; border-radius: 50%; background: linear-gradient(135deg, var(--sunset), var(--sand)); display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--white); }
.step-card h3 { margin-bottom: 12px; font-size: 1.2rem; }
.step-card p { font-size: 0.95rem; color: var(--warm-gray); }

@media (max-width: 768px) { .steps-grid { grid-template-columns: 1fr; gap: 24px; } }

/* ===== ギャラリー ===== */
.gallery-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 48px; }
.gallery-item { border-radius: var(--radius); overflow: hidden; position: relative; height: 400px; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.gallery-item:hover img { transform: scale(1.05); }
.gallery-overlay { position: absolute; bottom: 0; left: 0; right: 0; padding: 32px; background: linear-gradient(to top, rgba(0,0,0,0.7), transparent); }
.gallery-overlay h3 { color: var(--white); font-size: 1.3rem; margin-bottom: 8px; }
.gallery-overlay p { color: rgba(255,255,255,0.8); font-size: 0.9rem; }

@media (max-width: 768px) { .gallery-grid { grid-template-columns: 1fr; } .gallery-item { height: 300px; } }

/* ===== インストラクター ===== */
.instructors-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; margin-top: 48px; max-width: 800px; margin-left: auto; margin-right: auto; }
.instructor-card { text-align: center; background: var(--white); border-radius: var(--radius); padding: 40px 32px; box-shadow: var(--shadow-sm); transition: all 0.3s; }
.instructor-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.instructor-img { width: 140px; height: 140px; border-radius: 50%; object-fit: cover; margin: 0 auto 20px; border: 4px solid var(--cream); }
.instructor-card h3 { font-size: 1.2rem; margin-bottom: 4px; }
.instructor-card .role { font-size: 0.85rem; color: var(--sunset); margin-bottom: 12px; }
.instructor-card p { font-size: 0.9rem; color: var(--warm-gray); }

@media (max-width: 640px) { .instructors-grid { grid-template-columns: 1fr; } }

/* ===== 感想 ===== */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.testimonial-card { background: var(--white); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm); border-left: 4px solid var(--sunset); }
.testimonial-card .stars { color: var(--sand); font-size: 1.1rem; margin-bottom: 16px; }
.testimonial-card p { font-size: 0.95rem; color: var(--warm-gray); font-style: italic; margin-bottom: 20px; line-height: 1.7; }
.testimonial-author { font-weight: 500; font-size: 0.9rem; color: var(--indigo); }
.testimonial-role { font-size: 0.8rem; color: var(--warm-gray); }

@media (max-width: 768px) { .testimonials-grid { grid-template-columns: 1fr; } }

/* ===== ニュースレター ===== */
.newsletter { text-align: center; }
.newsletter h2 { color: var(--white); margin-bottom: 12px; }
.newsletter p { color: rgba(255,255,255,0.8); margin-bottom: 32px; }
.newsletter-form { display: flex; gap: 12px; max-width: 500px; margin: 0 auto; }
.newsletter-form input { flex: 1; padding: 14px 20px; border: none; border-radius: var(--radius-full); font-size: 0.95rem; font-family: var(--font-body); background: rgba(255,255,255,0.15); color: var(--white); backdrop-filter: blur(4px); }
.newsletter-form input::placeholder { color: rgba(255,255,255,0.5); }
.newsletter-form input:focus { outline: none; background: rgba(255,255,255,0.25); }

@media (max-width: 640px) { .newsletter-form { flex-direction: column; } }

/* ===== CTA ===== */
.cta { text-align: center; padding: 100px 0; background: linear-gradient(135deg, var(--sunset) 0%, var(--sand) 100%); }
.cta h2 { color: var(--white); font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 16px; }
.cta p { color: rgba(255,255,255,0.9); font-size: 1.1rem; margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }

/* ===== フッター ===== */
.footer { background: var(--indigo); color: rgba(255,255,255,0.7); padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-text { color: var(--white); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; }
.footer h4 { color: var(--white); font-family: var(--font-display); font-size: 1rem; margin-bottom: 20px; }
.footer ul li { margin-bottom: 12px; }
.footer ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: color 0.3s; }
.footer ul li a:hover { color: var(--sunset-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 24px 0; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.4); }

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

/* ===== ページヒーロー ===== */
.page-hero { padding: 160px 0 60px; background: var(--indigo); text-align: center; }
.page-hero .subtitle { color: var(--sand); }
.page-hero h1 { color: var(--white); font-size: clamp(2.5rem, 5vw, 3.5rem); }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 48px auto 0; }
.faq-item { border-bottom: 1px solid var(--light-gray); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 24px 0; cursor: pointer; font-family: var(--font-display); font-size: 1.1rem; font-weight: 500; color: var(--indigo); background: none; border: none; width: 100%; text-align: left; }
.faq-question:hover { color: var(--sunset); }
.faq-question svg { flex-shrink: 0; transition: transform 0.3s; }
.faq-item.open .faq-question svg { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease-out; }
.faq-answer-inner { padding: 0 0 24px; font-size: 0.95rem; color: var(--warm-gray); line-height: 1.8; }
.faq-item.open .faq-answer { max-height: 500px; }

/* ===== お問い合わせ ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-top: 48px; }
.contact-info h3 { font-size: 1.3rem; margin-bottom: 24px; }
.contact-detail { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 24px; }
.contact-detail-icon { width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, var(--sunset-light), var(--sunset)); display: flex; align-items: center; justify-content: center; color: var(--white); flex-shrink: 0; }
.contact-detail h4 { font-size: 0.95rem; margin-bottom: 4px; }
.contact-detail p, .contact-detail a { font-size: 0.9rem; color: var(--warm-gray); }
.contact-detail a:hover { color: var(--sunset); }
.contact-form label { display: block; font-size: 0.9rem; font-weight: 500; color: var(--indigo); margin-bottom: 8px; }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; padding: 14px 16px; border: 1px solid var(--light-gray); border-radius: var(--radius-sm); font-family: var(--font-body); font-size: 0.95rem; margin-bottom: 20px; transition: border-color 0.3s; background: var(--white); }
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { outline: none; border-color: var(--sunset); }
.contact-form textarea { min-height: 140px; resize: vertical; }

@media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; } }

/* ===== 法的ページ ===== */
.legal-content { max-width: 800px; margin: 0 auto; }
.legal-content h2 { font-size: 1.5rem; margin: 40px 0 16px; padding-top: 24px; border-top: 1px solid var(--light-gray); }
.legal-content h2:first-of-type { border-top: none; margin-top: 0; }
.legal-content p { font-size: 0.95rem; color: var(--warm-gray); line-height: 1.8; margin-bottom: 16px; }
.legal-content ul { padding-left: 24px; margin-bottom: 16px; }
.legal-content ul li { font-size: 0.95rem; color: var(--warm-gray); line-height: 1.8; margin-bottom: 8px; list-style: disc; }
.legal-content table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.legal-content th, .legal-content td { padding: 14px 16px; border: 1px solid var(--light-gray); font-size: 0.9rem; text-align: left; }
.legal-content th { background: var(--cream); font-weight: 500; color: var(--indigo); width: 30%; }
.legal-content td { color: var(--warm-gray); }

/* ===== トースト ===== */
.toast { position: fixed; bottom: 32px; right: 32px; background: var(--white); border-radius: var(--radius); padding: 20px 28px; box-shadow: var(--shadow-lg); border-left: 4px solid var(--sunset); z-index: 1000; transform: translateX(120%); transition: transform 0.3s; max-width: 360px; }
.toast.show { transform: translateX(0); }
.toast-title { font-family: var(--font-display); font-weight: 600; font-size: 1rem; color: var(--indigo); margin-bottom: 4px; }
.toast-message { font-size: 0.85rem; color: var(--warm-gray); line-height: 1.5; }

/* ===== スクロールリビール ===== */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }