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

:root {
  --black: #111111;
  --white: #ffffff;
  --off-white: #f7f7f7;
  --light-gray: #ebebeb;
  --mid-gray: #888888;
  --dark-gray: #444444;

  --font-serif-en: 'Cormorant Garamond', serif;
  --font-serif-ja: 'Noto Serif JP', serif;
  --font-sans: 'Noto Sans JP', sans-serif;

  --nav-height: 72px;
  --container: 1080px;
  --section-py: 100px;
  --transition: 0.35s ease;
}

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

body {
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--black);
  background: var(--white);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ===========================
   Layout
=========================== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

.section {
  padding: var(--section-py) 0;
}

.section-gray {
  background: var(--off-white);
}

/* ===========================
   Navigation
=========================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 1px 0 var(--light-gray);
}

.nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav-logo-ja {
  font-family: var(--font-serif-ja);
  font-weight: 400;
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.nav-logo-en {
  font-family: var(--font-serif-en);
  font-weight: 400;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  color: var(--mid-gray);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--dark-gray);
  position: relative;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--black);
  transition: width var(--transition);
}

.nav-link:hover { color: var(--black); }
.nav-link:hover::after { width: 100%; }

.nav-link-cta {
  padding: 8px 20px;
  border: 1px solid var(--black);
  color: var(--black);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  transition: background var(--transition), color var(--transition);
}

.nav-link-cta::after { display: none; }

.nav-link-cta:hover {
  background: var(--black);
  color: var(--white);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--black);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ===========================
   Hero
=========================== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 45% 55%;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 60px 80px 8vw;
  gap: 24px;
}

.hero-photo {
  position: relative;
  overflow: hidden;
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  display: block;
}

.hero-label {
  font-family: var(--font-serif-en);
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--mid-gray);
}

.hero-divider {
  width: 40px;
  height: 1px;
  background: var(--light-gray);
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hero-title-en {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(3rem, 5vw, 5.5rem);
  letter-spacing: 0.05em;
  line-height: 1;
  color: var(--black);
}

.hero-title-ja {
  font-family: var(--font-serif-ja);
  font-weight: 300;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  letter-spacing: 0.25em;
  color: var(--dark-gray);
}

.hero-sub {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--mid-gray);
}

.hero-desc {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 0.9rem;
  color: var(--dark-gray);
  line-height: 2;
}

/* ===========================
   Section Headers
=========================== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  font-family: var(--font-serif-en);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--mid-gray);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif-ja);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: 0.1em;
  color: var(--black);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--black);
  margin: 16px auto 0;
}

/* ===========================
   About intro
=========================== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}

.about-intro-photo {
  overflow: hidden;
}

.about-intro-photo img {
  width: 100%;
  display: block;
  transition: transform 0.6s ease;
}

.about-intro-photo:hover img {
  transform: scale(1.02);
}

.about-intro-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-intro-text p {
  font-size: 0.95rem;
  color: var(--dark-gray);
  line-height: 2.2;
}

.about-instagram-banner {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--black);
  color: var(--white);
  padding: 18px 24px;
  margin-top: 8px;
  transition: opacity var(--transition);
}

.about-instagram-banner:hover {
  opacity: 0.8;
}

.about-instagram-banner-icon {
  font-size: 0.7rem;
  flex-shrink: 0;
  opacity: 0.6;
}

.about-instagram-banner-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
}

.about-instagram-banner-text strong {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.about-instagram-banner-text span {
  font-size: 0.72rem;
  color: #aaa;
  letter-spacing: 0.04em;
}

.about-instagram-banner-arrow {
  font-size: 0.9rem;
  flex-shrink: 0;
  opacity: 0.5;
}

/* ===========================
   Features
=========================== */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.feature {
  background: var(--white);
  padding: 48px 40px;
  text-align: center;
}

.feature-icon {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: 2rem;
  color: var(--light-gray);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.feature-title {
  font-family: var(--font-serif-ja);
  font-weight: 400;
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.feature-text {
  font-size: 0.875rem;
  color: var(--dark-gray);
  line-height: 2;
}

/* ===========================
   Courses
=========================== */
.courses {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin-bottom: 80px;
}

.course-card {
  background: var(--off-white);
  padding: 36px 36px 40px;
  border-top: 2px solid transparent;
  transition: border-color var(--transition);
}

.course-card:hover {
  border-color: var(--black);
}

.course-time {
  display: inline-block;
  font-family: var(--font-serif-en);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--mid-gray);
  margin-bottom: 12px;
}

.course-name {
  font-family: var(--font-serif-ja);
  font-weight: 400;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.course-text {
  font-size: 0.85rem;
  color: var(--dark-gray);
  line-height: 2;
}

/* Course intro */
.course-intro {
  background: var(--off-white);
  border-left: 2px solid var(--black);
  padding: 20px 28px;
  margin-bottom: 32px;
}

.course-intro p {
  font-size: 0.9rem;
  color: var(--dark-gray);
  line-height: 2;
}

/* Pricing */
.pricing {
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
}

.pricing-title {
  font-family: var(--font-serif-ja);
  font-weight: 400;
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.pricing-note {
  font-size: 0.8rem;
  color: var(--mid-gray);
  margin-bottom: 32px;
}

.price-table {
  width: 100%;
  border-collapse: collapse;
}

.price-table th,
.price-table td {
  padding: 16px 24px;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

.price-table thead tr {
  border-bottom: 2px solid var(--black);
}

.price-table th {
  font-weight: 500;
  text-align: left;
}

.price-table tbody tr {
  border-bottom: 1px solid var(--light-gray);
}

.price-table tbody tr:last-child {
  border-bottom: none;
}

.price-table td:last-child {
  text-align: right;
  font-family: var(--font-serif-en);
  font-weight: 400;
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

.price-row-online td {
  color: var(--mid-gray);
  border-top: 1px dashed var(--light-gray) !important;
  border-bottom: none !important;
  font-size: 0.85rem;
}

.price-row-online td:last-child {
  font-size: 1rem;
}

.pricing-tax {
  font-size: 0.75rem;
  color: var(--mid-gray);
  margin-top: 12px;
  text-align: right;
}

/* ===========================
   Profile
=========================== */
.profile-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 72px;
  align-items: start;
}

.profile-photo {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.profile-name-en {
  font-family: var(--font-serif-en);
  font-weight: 300;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--mid-gray);
  margin-bottom: 6px;
}

.profile-name {
  font-family: var(--font-serif-ja);
  font-weight: 400;
  font-size: 1.7rem;
  letter-spacing: 0.15em;
  margin-bottom: 28px;
}

.profile-bio {
  font-size: 0.875rem;
  color: var(--dark-gray);
  line-height: 2.2;
  margin-bottom: 40px;
}

.profile-section {
  margin-bottom: 28px;
}

.profile-section-title {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--mid-gray);
  border-bottom: 1px solid var(--light-gray);
  padding-bottom: 8px;
  margin-bottom: 16px;
}

.profile-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.profile-list li {
  font-size: 0.875rem;
  color: var(--dark-gray);
  line-height: 1.8;
  padding-left: 16px;
  position: relative;
}

.profile-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--light-gray);
  font-size: 0.8rem;
}

/* ===========================
   Performance
=========================== */
.performance-main {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 64px;
  align-items: start;
  margin-bottom: 64px;
}

.performance-text p {
  font-size: 0.95rem;
  color: var(--dark-gray);
  line-height: 2.2;
}

.recital-flyer-wrap {
  position: relative;
}

.recital-flyer-img {
  width: 100%;
  display: block;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

.recital-flyer-wrap:empty,
.recital-flyer-img[src="photo/リサイタル.jpg"]:not([naturalWidth]) {
  aspect-ratio: 1 / 1.41;
  background: var(--light-gray);
}

/* Instagram CTA */
.instagram-cta {
  background: var(--black);
  padding: 64px;
  display: flex;
  align-items: center;
  gap: 64px;
}

.instagram-cta-inner {
  flex: 1;
}

.instagram-cta-label {
  font-family: var(--font-serif-en);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: #666;
  margin-bottom: 12px;
}

.instagram-cta-title {
  font-family: var(--font-serif-ja);
  font-weight: 300;
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  letter-spacing: 0.1em;
  color: var(--white);
  margin-bottom: 20px;
}

.instagram-cta-text {
  font-size: 0.9rem;
  color: #aaa;
  line-height: 2;
  margin-bottom: 36px;
}

.instagram-cta .btn-primary {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}

.instagram-cta .btn-primary:hover {
  background: transparent;
  color: var(--white);
}

.instagram-cta-thumb {
  position: relative;
  flex-shrink: 0;
  width: 200px;
  display: block;
  overflow: hidden;
}

.instagram-cta-thumb img {
  width: 100%;
  display: block;
  transition: transform 0.4s ease;
}

.instagram-cta-thumb:hover img {
  transform: scale(1.04);
}

.instagram-cta-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--white);
  background: rgba(0, 0, 0, 0.25);
  transition: background 0.3s;
}

.instagram-cta-thumb:hover .instagram-cta-play {
  background: rgba(0, 0, 0, 0.45);
}

@media (max-width: 900px) {
  .instagram-cta-thumb {
    width: 140px;
  }
}

/* ===========================
   Buttons
=========================== */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-align: center;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  cursor: pointer;
}

.btn-primary {
  padding: 16px 40px;
  background: var(--black);
  color: var(--white);
  border: 1px solid var(--black);
}

.btn-primary:hover {
  background: transparent;
  color: var(--black);
}

.btn-outline {
  padding: 14px 36px;
  background: transparent;
  color: var(--black);
  border: 1px solid var(--black);
}

.btn-outline:hover {
  background: var(--black);
  color: var(--white);
}

.btn-full {
  width: 100%;
}

/* ===========================
   Contact
=========================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.contact-intro {
  font-size: 0.9rem;
  color: var(--dark-gray);
  line-height: 2.2;
  margin-bottom: 40px;
}

.contact-details {
  display: grid;
  row-gap: 20px;
}

.contact-details dt {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--mid-gray);
  margin-bottom: 4px;
}

.contact-details dd {
  font-size: 0.9rem;
  color: var(--dark-gray);
  line-height: 1.7;
}

.contact-details dd a {
  border-bottom: 1px solid var(--light-gray);
  transition: border-color var(--transition), color var(--transition);
}

.contact-details dd a:hover {
  color: var(--black);
  border-color: var(--black);
}

.contact-details small {
  font-size: 0.75rem;
  color: var(--mid-gray);
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: relative;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--dark-gray);
}

.required {
  color: var(--black);
  font-size: 0.7rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--light-gray);
  background: var(--white);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 300;
  color: var(--black);
  outline: none;
  transition: border-color var(--transition);
  appearance: none;
  border-radius: 0;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--black);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23888' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-note {
  font-size: 0.75rem;
  color: var(--mid-gray);
  text-align: center;
  margin-top: -8px;
}

.form-success {
  display: none;
  position: absolute;
  inset: 0;
  background: var(--white);
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px solid var(--light-gray);
  padding: 40px;
}

.form-success.show {
  display: flex;
}

.form-success p {
  font-size: 0.95rem;
  color: var(--dark-gray);
  line-height: 2;
}

/* ===========================
   Footer
=========================== */
.footer {
  background: var(--black);
  color: var(--white);
  padding: 60px 0 32px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 48px;
}

.footer-logo-ja {
  font-family: var(--font-serif-ja);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.12em;
  margin-bottom: 4px;
}

.footer-logo-en {
  font-family: var(--font-serif-en);
  font-weight: 300;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: #888;
  margin-bottom: 12px;
}

.footer-address {
  font-size: 0.78rem;
  color: #888;
  letter-spacing: 0.05em;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-end;
}

.footer-nav a {
  font-size: 0.78rem;
  color: #888;
  letter-spacing: 0.06em;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--white);
}

.footer-copy {
  font-size: 0.7rem;
  color: #555;
  letter-spacing: 0.06em;
  border-top: 1px solid #222;
  padding-top: 24px;
  text-align: center;
}

/* ===========================
   Scroll Animations
=========================== */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.features .feature:nth-child(2) { transition-delay: 0.1s; }
.features .feature:nth-child(3) { transition-delay: 0.2s; }
.features .feature:nth-child(4) { transition-delay: 0.1s; }
.features .feature:nth-child(5) { transition-delay: 0.2s; }
.features .feature:nth-child(6) { transition-delay: 0.3s; }

.courses .course-card:nth-child(2) { transition-delay: 0.05s; }
.courses .course-card:nth-child(3) { transition-delay: 0.1s; }
.courses .course-card:nth-child(4) { transition-delay: 0.15s; }

/* ===========================
   Responsive
=========================== */
@media (max-width: 900px) {
  :root {
    --section-py: 72px;
  }

  .container {
    padding: 0 24px;
  }

  .nav {
    padding: 0 24px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 24px 0 32px;
    border-top: 1px solid var(--light-gray);
    box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    padding: 16px 24px;
    width: 100%;
    text-align: center;
    font-size: 0.9rem;
  }

  .nav-link-cta {
    margin-top: 8px;
    border: none;
    font-weight: 500;
  }

  .about-intro {
    grid-template-columns: 1fr;
    gap: 36px;
    margin-bottom: 56px;
  }

  .features {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .courses {
    grid-template-columns: 1fr;
  }

  .course-card {
    padding: 28px 24px 32px;
  }

  .profile-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .profile-photo-wrap {
    max-width: 240px;
    margin: 0 auto;
  }

  .performance-main {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .recital-flyer-wrap {
    max-width: 280px;
  }

  .instagram-cta {
    padding: 40px 24px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 32px;
  }

  .footer-nav {
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
  }

  .hero-keys .key.white { width: 28px; }
  .hero-keys .key.black { width: 18px; margin: 0 -10px; }
}

@media (max-width: 600px) {
  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: auto 50vw;
    min-height: auto;
  }

  .hero-content {
    padding: 60px 24px 48px;
  }

  .hero-photo {
    min-height: 50vw;
  }

  .section-header {
    margin-bottom: 48px;
  }

  .feature {
    padding: 36px 24px;
  }

  .course-card {
    padding: 32px 24px;
  }
}