/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: #333;
  background: #fff;
  line-height: 1.8;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ===== Variables ===== */
:root {
  --gold: #c9a96e;
  --gold-light: #f5edd8;
  --gold-dark: #a07840;
  --beige: #faf7f2;
  --text: #333;
  --text-light: #777;
  --white: #fff;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --transition: 0.3s ease;
}

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

.section { padding: 96px 0; }

.section-header { text-align: center; margin-bottom: 56px; }

.section-label {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: #222;
  letter-spacing: 0.05em;
}

.section-desc {
  margin-top: 16px;
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-block;
  background: var(--gold);
  color: #fff;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 16px 40px;
  border-radius: 50px;
  transition: background var(--transition), transform var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-family: 'Noto Sans JP', sans-serif;
}
.btn-primary:hover { background: var(--gold-dark); transform: translateY(-2px); }

.btn-secondary {
  display: inline-block;
  border: 2px solid var(--gold);
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 14px 36px;
  border-radius: 50px;
  transition: all var(--transition);
}
.btn-secondary:hover { background: var(--gold); color: #fff; }

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(201,169,110,0.2);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo { display: flex; flex-direction: column; line-height: 1.2; }
.logo-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--gold);
}
.logo-ja {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: #222;
}

.nav ul { display: flex; gap: 32px; align-items: center; }
.nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: #555;
  position: relative;
  transition: color var(--transition);
}
.nav a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width var(--transition);
}
.nav a:hover { color: var(--gold); }
.nav a:hover::after { width: 100%; }

.nav-cta {
  background: var(--gold);
  color: #fff !important;
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 0.85rem !important;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--gold-dark) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: #333;
  transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--beige);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 50%, rgba(201,169,110,0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(201,169,110,0.08) 0%, transparent 50%);
}

/* 音符の装飾 */
.hero-bg::before, .hero-bg::after {
  content: '♪';
  position: absolute;
  font-size: 8rem;
  color: rgba(201,169,110,0.07);
  font-family: serif;
}
.hero-bg::before { top: 10%; right: 8%; }
.hero-bg::after { bottom: 15%; left: 5%; font-size: 5rem; }

.hero-content {
  position: relative;
  text-align: center;
  padding: 120px 24px 80px;
  max-width: 700px;
}

.hero-sub {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1rem;
  letter-spacing: 0.4em;
  color: var(--gold);
  margin-bottom: 24px;
}

.hero-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 600;
  color: #1a1a1a;
  line-height: 1.4;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}
.hero-title span { display: block; }

.hero-desc {
  color: var(--text-light);
  font-size: 1rem;
  margin-bottom: 40px;
  letter-spacing: 0.05em;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--gold);
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
}
.hero-scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--gold), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===== About ===== */
.about { background: #fff; }

.about-lead {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
  color: #555;
  font-size: 1rem;
  line-height: 2;
}
.about-lead p + p { margin-top: 16px; }

.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--beige);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

.feature-icon { font-size: 2rem; margin-bottom: 16px; }

.feature-card h3 {
  font-family: 'Noto Serif JP', serif;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: #222;
}
.feature-card p { font-size: 0.88rem; color: #666; line-height: 1.8; }

/* ===== Lesson ===== */
.lesson { background: var(--beige); }

.lesson-cards { display: flex; flex-direction: column; gap: 48px; }

.lesson-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  grid-template-columns: 280px 1fr;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}
.lesson-card:hover { transform: translateY(-3px); }

.lesson-img {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}
.lesson-img--vocal  { background: linear-gradient(135deg, #f8e8d0, #f0d4a8); }
.lesson-img--piano  { background: linear-gradient(135deg, #e8e0f0, #d0c4e8); }
.lesson-img--flute  { background: linear-gradient(135deg, #d0eae8, #a8d8d4); }
.lesson-img-icon { font-size: 4rem; }

.lesson-body { padding: 36px; }
.lesson-body h3 {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.5rem;
  font-weight: 600;
  color: #222;
  margin-bottom: 8px;
}
.lesson-target {
  font-size: 0.8rem;
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  border-left: 3px solid var(--gold);
  padding-left: 10px;
}
.lesson-body p { color: #555; font-size: 0.95rem; margin-bottom: 20px; }

.lesson-points { display: flex; flex-direction: column; gap: 8px; }
.lesson-points li {
  font-size: 0.88rem;
  color: #666;
  padding-left: 20px;
  position: relative;
}
.lesson-points li::before {
  content: '♪';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 0.75rem;
  top: 1px;
}

.lesson-note {
  text-align: center;
  margin-top: 48px;
}
.lesson-note p {
  color: var(--text-light);
  font-size: 0.88rem;
  margin-bottom: 24px;
}

.lesson-link {
  display: inline-block;
  margin-top: 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--gold-dark);
  letter-spacing: 0.05em;
  transition: color var(--transition);
}
.lesson-link:hover { color: var(--gold); }

/* ===== Profile ===== */
.profile { background: #fff; }

.profile-tabs { display: flex; flex-direction: column; gap: 0; }

.profile-divider {
  border: none;
  border-top: 1px solid var(--gold-light);
  margin: 56px 0;
}

.profile-inner {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 64px;
  align-items: start;
}

.profile-photo-placeholder {
  aspect-ratio: 3/4;
  background: var(--beige);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #bbb;
  font-size: 1rem;
  letter-spacing: 0.1em;
  border: 2px dashed #ddd;
}

.profile-photo-img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius);
}

.profile-name-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 4px;
}
.profile-name {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.8rem;
  font-weight: 600;
  color: #222;
  margin-bottom: 8px;
}
.profile-unit {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 28px;
}

.profile-bio { color: #555; font-size: 0.95rem; line-height: 2; margin-bottom: 28px; }
.profile-bio p + p { margin-top: 12px; }

.profile-career h4 {
  font-family: 'Noto Serif JP', serif;
  font-size: 1rem;
  color: #333;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--gold-light);
}
.profile-career li {
  font-size: 0.9rem;
  color: #666;
  padding: 6px 0 6px 16px;
  position: relative;
  border-bottom: 1px solid #f0f0f0;
}
.profile-career li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--gold);
}

/* ===== Access ===== */
.access { background: var(--beige); }

.access-inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  align-items: start;
}

.access-info dl { }
.access-info dt {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  text-transform: uppercase;
  margin-top: 24px;
}
.access-info dt:first-child { margin-top: 0; }
.access-info dd {
  font-size: 0.95rem;
  color: #444;
  margin-top: 4px;
  line-height: 1.8;
}
.access-info a:hover { color: var(--gold); text-decoration: underline; }

.access-map iframe { border-radius: var(--radius); }
.map-note {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 10px;
}

/* ===== Contact ===== */
.contact { background: #fff; }

.contact-methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 56px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px 24px;
  border-radius: var(--radius);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 2px solid transparent;
}
.contact-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

.contact-card--email {
  background: var(--beige);
  border-color: var(--gold-light);
}
.contact-card--line {
  background: #f0faf0;
  border-color: #c8ecc8;
}

.contact-card-icon { font-size: 2.2rem; margin-bottom: 12px; }
.contact-card h3 { font-size: 1rem; font-weight: 600; color: #222; margin-bottom: 6px; }
.contact-card p { font-size: 0.85rem; color: var(--text-light); }

/* お問い合わせフォーム */
.contact-form {
  max-width: 720px;
  margin: 0 auto;
  background: var(--beige);
  padding: 48px;
  border-radius: var(--radius);
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 24px; }
.form-group:last-child { margin-bottom: 0; }

label {
  font-size: 0.88rem;
  font-weight: 500;
  color: #444;
  display: flex;
  align-items: center;
  gap: 8px;
}
.required {
  background: var(--gold);
  color: #fff;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
}

input, select, textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid #e0d8cc;
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: 'Noto Sans JP', sans-serif;
  color: #333;
  background: #fff;
  transition: border-color var(--transition);
  appearance: none;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--gold);
}
textarea { resize: vertical; }

.btn-submit { width: 100%; margin-top: 8px; font-size: 1rem; padding: 18px; }

.hidden-field { display: none; }

/* ===== Footer ===== */
.footer { background: #1a1a1a; color: #aaa; padding: 56px 0 24px; }

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 40px;
  border-bottom: 1px solid #333;
  margin-bottom: 24px;
}

.footer-logo-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 4px;
}
.footer-logo-ja {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.2rem;
  color: #eee;
  margin-bottom: 12px;
}
.footer-address { font-size: 0.85rem; line-height: 1.8; }

.footer-nav ul { display: flex; flex-direction: column; gap: 12px; text-align: right; }
.footer-nav a { font-size: 0.88rem; transition: color var(--transition); }
.footer-nav a:hover { color: var(--gold); }

.footer-bottom { text-align: center; font-size: 0.78rem; }

/* ===== Scroll Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .features { grid-template-columns: repeat(2, 1fr); }
  .lesson-card { grid-template-columns: 1fr; }
  .lesson-img { min-height: 160px; }
  .profile-inner { grid-template-columns: 1fr; }
  .profile-photo-placeholder { aspect-ratio: 1/1; max-width: 280px; }
  .access-inner { grid-template-columns: 1fr; }
  .contact-form { padding: 32px 24px; }

  /* モバイル・タブレットナビ */
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: #fff;
    padding: 24px;
    border-top: 1px solid #eee;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }
  .nav.open { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav ul { flex-direction: column; gap: 20px; align-items: flex-start; }
  .nav-cta { width: 100%; text-align: center; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  /* スマホではPC用の手動改行（リード文・.br-pc）を無効化し、自然な折り返しに */
  .about-lead br,
  .br-pc { display: none; }
  .features { grid-template-columns: 1fr; }
  .contact-methods { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-nav ul { text-align: left; }
}