@charset "utf-8";

:root {
  --color-bg: #ffffff;
  --color-main: #20262b;
  --color-muted: #545b61;
  --color-accent: #a9d2dc;
  --color-accent-dark: #78b2c0;
  --color-border: #dfe8eb;
  --color-bg-light: #f7f7f7;
  --color-blue-soft: #eef8fa;
  --color-section-tint: #f5f5f5;
  --font-serif: "Cormorant Garamond", Georgia, serif;
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-en: "Nunito", "Zen Kaku Gothic New", sans-serif;
  --font-script: "Imperial Script", cursive;
  --font-sans: "Zen Kaku Gothic New", "Noto Sans JP", "Yu Gothic", sans-serif;
  --inner: min(100% - 96px, 1160px);
  --wide: min(100% - 64px, 1440px);
  --header-height: 72px;
  /* 参考サイト準拠の角丸スケール（PC基準） */
  --radius-sm: 10px;
  --radius-md: 20px;
  --radius-lg: 40px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-main);
  font-family: var(--font-sans);
  font-weight: 400;
  letter-spacing: 0.05em;
  line-height: 1.9;
}

body.is-menu-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  width: var(--wide);
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}

.brand span {
  font-family: var(--font-serif);
  font-size: 28px;
  letter-spacing: 0.17em;
}

.brand small {
  margin-top: 7px;
  color: var(--color-accent-dark);
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.global-nav {
  display: flex;
  align-items: center;
  gap: 23px;
  color: var(--color-main);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 12px 31px;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  background: var(--color-accent);
  color: #ffffff;
  font-size: 14px;
  letter-spacing: 0.08em;
}

.nav-cta--ghost,
.button--outline {
  background: rgba(255, 255, 255, 0.78);
  color: var(--color-accent-dark);
}

.menu-button {
  display: none;
}

.hero {
  position: relative;
  min-height: 820px;
  padding: 0 max(48px, calc((100vw - 1160px) / 2)) 96px;
  overflow: hidden;
}

.hero::after,
.section::after,
.school-intro::after {
  content: "";
  position: absolute;
  pointer-events: none;
  opacity: 0.55;
  background:
    radial-gradient(circle at 16px 16px, rgba(169, 210, 220, 0.65) 0 4px, transparent 5px),
    radial-gradient(circle at 70px 52px, rgba(219, 188, 121, 0.55) 0 3px, transparent 4px),
    radial-gradient(circle at 118px 18px, rgba(169, 210, 220, 0.45) 0 5px, transparent 6px);
  width: 150px;
  height: 90px;
}

.hero::after {
  left: max(48px, calc((100vw - 1160px) / 2));
  bottom: 150px;
}

.hero__copy {
  position: relative;
  z-index: 8;
  width: 540px;
  padding-top: 138px;
  margin-left: 0;
}

.eyebrow,
.section-label {
  margin: 0 0 15px;
  color: var(--color-accent-dark);
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.16em;
}

.section-label,
.center-heading .section-label {
  font-size: 61px;
  line-height: 1.1;
}

.hero h1,
.section-copy h2,
.center-heading h2,
.school-intro h2 {
  margin: 0;
  font-weight: 300;
  letter-spacing: 0.12em;
}

.hero h1 {
  font-family: var(--font-sans);
  font-size: 72px;
  line-height: 1.5;
  letter-spacing: 0.16em;
  white-space: nowrap;
}

.hero__copy > p:not(.eyebrow) {
  width: 470px;
  margin: 24px 0 0;
  color: var(--color-muted);
  font-size: 16px;
  line-height: 2.15;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.hero__visual {
  position: absolute;
  z-index: 1;
  top: var(--header-height);
  right: 0;
  width: 44vw;
  height: 787px;
  margin: 0;
}

.hero__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(90deg, #fff 0%, rgba(255, 255, 255, 0.7) 9%, rgba(255, 255, 255, 0) 30%),
    linear-gradient(180deg, rgba(255,255,255,0) 82%, #fff 100%);
}

.hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 35%;
  filter: saturate(0.86) brightness(1.04);
}

.hero__piano-ornament {
  display: block;
  margin: 36px 0 40px 90px;
  width: 420px;
  height: auto;
  opacity: 0.9;
}

.section-ornament,
.school-ornament {
  position: absolute;
  pointer-events: none;
  user-select: none;
}

.score-band {
  position: relative;
  margin-top: 72px;
  padding: 26px 0;
  overflow: hidden;
}

.score-band::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 200px; /* なだらかな波の五線譜（5本・全幅1波） */
  transform: translateY(-50%);
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%201200%20200'%20preserveAspectRatio='none'%3E%3Cg%20fill='none'%20stroke='%23a9d2dc'%20stroke-width='1.2'%20opacity='0.5'%3E%3Cpath%20d='M0%2044C200%2010%20400%2010%20600%2044C800%2078%201000%2078%201200%2044'/%3E%3Cpath%20d='M0%2072C200%2038%20400%2038%20600%2072C800%20106%201000%20106%201200%2072'/%3E%3Cpath%20d='M0%20100C200%2066%20400%2066%20600%20100C800%20134%201000%20134%201200%20100'/%3E%3Cpath%20d='M0%20128C200%2094%20400%2094%20600%20128C800%20162%201000%20162%201200%20128'/%3E%3Cpath%20d='M0%20156C200%20122%20400%20122%20600%20156C800%20190%201000%20190%201200%20156'/%3E%3C/g%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 200px;
}

.score-band > span {
  position: relative;
  display: block;
  text-align: center;
  color: rgba(40, 47, 53, 0.2);
  font-family: var(--font-display);
  font-size: clamp(54px, 9vw, 138px);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1;
  white-space: nowrap;
}

.section {
  position: relative;
  padding: 140px 0;
  overflow: hidden;
}

/* 交互背景：淡色セクション */
.section--tint,
.school-intro.section--tint {
  background-color: var(--color-section-tint);
}

.section__inner,
.site-footer__inner {
  width: var(--inner);
  margin-inline: auto;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr);
  align-items: center;
  gap: 110px;
}

.split--reverse {
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.84fr);
}

/* 日本語タイトル：英語タイトルの下に置く小さな読み（色を合わせて小さく） */
.section-copy h2,
.center-heading h2 {
  margin: 6px 0 0;
  font-size: 18px;
  font-weight: 400;
  color: var(--color-accent-dark);
  letter-spacing: 0.16em;
  line-height: 1.6;
}

.lead {
  margin: 22px 0 22px;
  font-size: 24px;
  letter-spacing: 0.1em;
}

.section-copy p:not(.section-label):not(.lead),
.center-heading p,
.school-intro p,
.site-footer p {
  color: var(--color-muted);
  font-size: 16px;
  line-height: 2.15;
}

.profile-list {
  margin: 32px 0 0;
  border-top: 1px solid var(--color-border);
}

.profile-list div {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 22px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

.profile-list dt {
  color: var(--color-accent-dark);
  font-family: var(--font-en);
  letter-spacing: 0.12em;
}

.profile-list dd {
  margin: 0;
  color: var(--color-muted);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 32px;
  color: var(--color-accent-dark);
  font-size: 15px;
  letter-spacing: 0.12em;
}

.text-link::after {
  content: "→";
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  font-size: 15px;
  line-height: 1;
  transition: transform 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}

.text-link:hover::after {
  transform: translateX(5px);
  background-color: var(--color-accent);
  color: #fff;
}

.portrait-card {
  margin: 0;
}

.portrait-card img {
  width: 100%;
  aspect-ratio: 4 / 4.55;
  object-fit: cover;
  object-position: center 25%;
  border-radius: var(--radius-lg);
  filter: saturate(0.78) brightness(1.04);
}

.photo-collage {
  position: relative;
  aspect-ratio: 5 / 5.3;
  margin: 0;
}

.photo-collage img {
  position: absolute;
  object-fit: cover;
  filter: saturate(0.82) brightness(1.03);
}

.photo-collage .collage-ornament {
  position: absolute;
  top: -18px;
  left: -14px;
  z-index: 0;
  width: 92px;
  height: auto;
  object-fit: contain;
  filter: none;
  opacity: 0.9;
  pointer-events: none;
}

/* 2枚構成 */
.photo-collage--two {
  aspect-ratio: 5 / 5.9;
}

/* 第九ポスター（メイン・大・右上） */
.photo-collage__main {
  top: 0;
  right: 0;
  width: 74%;
  aspect-ratio: 3 / 4.1;
  border-radius: var(--radius-lg);
  z-index: 1;
}

/* 講座チラシ（左下・前面に重ねる） */
.photo-collage__sub {
  left: 0;
  bottom: 0;
  width: 56%;
  aspect-ratio: 1 / 1;
  border: 6px solid #fff;
  border-radius: var(--radius-md);
  z-index: 2;
}

.year-list {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.year-list li {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 18px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 15px;
}

.year-list span {
  color: var(--color-accent-dark);
  font-family: var(--font-en);
  letter-spacing: 0.12em;
}

.service-overview {
  padding: 150px 0 165px;
}

.section-ornament--service {
  right: max(20px, calc((100vw - 1120px) / 2));
  top: 86px;
  width: min(16vw, 170px);
  opacity: 0.62;
}

.center-heading {
  width: min(100%, 760px);
  margin-inline: auto;
  text-align: center;
}

.service-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 64px;
}

.service-cards article {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 24px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.service-cards article:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.service-icon {
  display: grid;
  place-items: center;
  width: 84px;
  height: 84px;
  margin: 0 auto 20px;
}

.service-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.service-cards h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.1em;
}

.service-cards p {
  margin: 14px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 2;
}

.center-action {
  margin-top: 46px;
  text-align: center;
}

.school-intro {
  position: relative;
  padding: 90px 24px 130px;
  text-align: center;
  overflow: hidden;
}

.school-ornament {
  right: 0;
  top: 36px;
  width: min(18vw, 190px);
  opacity: 0.62;
}

.school-intro .school-title {
  position: relative;
  z-index: 1;
  display: inline-block;
  width: auto;
  margin: 0;
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: clamp(44px, 7vw, 104px);
  letter-spacing: 0.04em;
  line-height: 1;
}

/* タイトルの一文字ずつを rotateY でくるくる回す */
[data-spin] {
  perspective: 800px;
}

.spin-char {
  display: inline-block;
  position: relative;
  white-space: pre;
  transform-origin: center;
}

[data-spin]:hover .spin-char {
  animation: spinY 0.9s ease;
}

@keyframes spinY {
  from { transform: rotateY(0deg); }
  to { transform: rotateY(360deg); }
}


.school-intro h2 {
  margin-top: 22px;
  font-size: 28px;
}

.school-intro p {
  width: min(100%, 680px);
  margin: 38px auto 0;
}

.score-line {
  position: absolute;
  inset: 34px 0 auto;
  height: 200px;
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%201200%20200'%20preserveAspectRatio='none'%3E%3Cg%20fill='none'%20stroke='%23a9d2dc'%20stroke-width='1.2'%20opacity='0.5'%3E%3Cpath%20d='M0%2044C200%2010%20400%2010%20600%2044C800%2078%201000%2078%201200%2044'/%3E%3Cpath%20d='M0%2072C200%2038%20400%2038%20600%2072C800%20106%201000%20106%201200%2072'/%3E%3Cpath%20d='M0%20100C200%2066%20400%2066%20600%20100C800%20134%201000%20134%201200%20100'/%3E%3Cpath%20d='M0%20128C200%2094%20400%2094%20600%20128C800%20162%201000%20162%201200%20128'/%3E%3Cpath%20d='M0%20156C200%20122%20400%20122%20600%20156C800%20190%201000%20190%201200%20156'/%3E%3C/g%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 200px;
}

.lesson-photos {
  position: relative;
  aspect-ratio: 5 / 4.7;
  margin: 0;
}

.lesson-photos img {
  position: absolute;
  object-fit: cover;
  border: 6px solid #fff;
  border-radius: var(--radius-md);
  filter: saturate(0.78) brightness(1.04);
}

/* 縦長・左（少し下げる） */
.lesson-photos img:nth-child(1) {
  left: 0;
  top: 9%;
  width: 45%;
  aspect-ratio: 3 / 4.1;
  z-index: 2;
}

/* 横長・右上（上にずらして背面） */
.lesson-photos img:nth-child(2) {
  right: 0;
  top: 0;
  width: 52%;
  aspect-ratio: 4 / 3;
  z-index: 1;
}

/* 小さめ・中央下（前面で重ねる） */
.lesson-photos img:nth-child(3) {
  left: 32%;
  bottom: 0;
  width: 40%;
  aspect-ratio: 3 / 3.3;
  z-index: 3;
}

.lesson-points {
  display: grid;
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.lesson-points li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-left: 2px solid var(--color-accent);
  background: rgba(169, 210, 220, 0.08);
  color: var(--color-muted);
  font-size: 15px;
}

.lesson-points img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex: 0 0 32px;
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 24px;
  z-index: 8;
  display: grid;
  justify-items: center;
  gap: 10px;
  transform: translateX(-50%);
  color: var(--color-accent-dark);
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.22em;
}

.scroll-hint__line {
  position: relative;
  width: 1px;
  height: 52px;
  background: rgba(120, 178, 192, 0.45);
}

.scroll-hint__line::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -3px;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-accent-dark);
  transform: translateX(-50%);
  animation: scroll-dot 2s ease-in-out infinite;
}

@keyframes scroll-dot {
  0% { transform: translate(-50%, -46px); opacity: 0; }
  35% { opacity: 1; }
  100% { transform: translate(-50%, 0); opacity: 0; }
}

.price-cta {
  padding: 120px 0;
}

.price-cta .center-heading p:not(.section-label) {
  font-size: 18px;
  line-height: 2.1;
}

.price-cta__leaf {
  left: max(20px, calc((100vw - 1240px) / 2));
  bottom: 40px;
  width: min(14vw, 150px);
  opacity: 0.5;
}

.cta-band {
  position: relative;
  padding: 140px 24px;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(169, 210, 220, 0.1), rgba(255, 255, 255, 0));
}

.cta-band h2 {
  margin: 18px 0 0;
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 300;
  letter-spacing: 0.12em;
  line-height: 1.6;
}

.cta-band .button {
  margin-top: 40px;
}

.cta-band__leaf {
  position: absolute;
  pointer-events: none;
  opacity: 0.5;
}

.cta-band__leaf--left {
  left: 4%;
  bottom: 24px;
  width: min(13vw, 140px);
}

.cta-band__leaf--right {
  right: 5%;
  top: 36px;
  width: min(11vw, 120px);
}

.site-footer {
  position: relative;
  padding: 74px 0 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(169, 210, 220, 0.12) 100%),
    var(--color-bg);
  border-top: 1px solid rgba(169, 210, 220, 0.22);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.1fr 1.9fr;
  gap: 48px 60px;
}

.brand--footer span {
  font-size: 29px;
}

.footer-brand p {
  margin-top: 18px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.footer-col {
  display: grid;
  align-content: start;
  gap: 12px;
}

.footer-col h4 {
  margin: 0 0 4px;
  color: var(--color-accent-dark);
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.14em;
}

.footer-col a {
  color: var(--color-muted);
  font-size: 14px;
}

.footer-col a:hover {
  color: var(--color-accent-dark);
}

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid rgba(169, 210, 220, 0.22);
}

.footer-policy {
  color: var(--color-muted);
  font-size: 13px;
}

.footer-policy:hover {
  color: var(--color-accent-dark);
}

.copyright {
  margin: 0;
  color: var(--color-muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.to-top {
  position: absolute;
  top: -26px;
  right: max(24px, calc((100vw - 1160px) / 2));
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  background: #fff;
  color: var(--color-accent-dark);
  font-size: 18px;
  line-height: 1;
  transition: background 0.3s ease, color 0.3s ease;
}

.to-top:hover {
  background: var(--color-accent);
  color: #fff;
}

.lower-hero {
  padding: 160px 0 78px;
  background: linear-gradient(180deg, rgba(169, 210, 220, 0.12), rgba(255, 255, 255, 0));
}

.lower-hero__inner,
.lower-section__inner {
  width: var(--inner);
  margin-inline: auto;
}

.lower-hero h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(48px, 8vw, 92px);
  font-weight: 300;
  letter-spacing: 0.08em;
  line-height: 1;
}

.lower-hero p {
  width: min(100%, 620px);
  margin: 30px 0 0;
  color: var(--color-muted);
}

.lower-section {
  padding: 84px 0;
}

.simple-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.simple-card {
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.simple-card h2,
.simple-card h3 {
  margin: 0 0 18px;
  font-weight: 400;
  letter-spacing: 0.08em;
}

.simple-card p,
.simple-card li {
  color: var(--color-muted);
  font-size: 14px;
}

.contact-panel {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 60px;
  align-items: start;
}

.contact-form {
  position: relative;
  padding: 42px;
  border: 1px solid var(--color-main);
  border-radius: var(--radius-md);
  background: #fff;
}

.contact-form::before {
  content: "";
  position: absolute;
  inset: 8px -8px -8px 8px;
  z-index: -1;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.contact-form label {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--color-muted);
  font-size: 13px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
}

.contact-form textarea {
  min-height: 150px;
  resize: vertical;
}

@media (max-width: 768px) {
  :root {
    --inner: min(100% - 32px, 1120px);
    --header-height: 72px;
    --radius-sm: 6px;
    --radius-md: 14px;
    --radius-lg: 22px;
  }

  .site-header__inner {
    width: min(100% - 28px, 1120px);
  }

  .brand span {
    font-size: 22px;
  }

  .menu-button {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 0;
    background: transparent;
    padding: 0;
  }

  .menu-button span {
    width: 24px;
    height: 1px;
    background: var(--color-main);
  }

  .menu-button span + span {
    margin-top: -12px;
  }

  .global-nav {
    position: fixed;
    inset: var(--header-height) 0 auto;
    display: none;
    min-height: calc(100vh - var(--header-height));
    padding: 34px 24px;
    background: rgba(255, 255, 255, 0.97);
    flex-direction: column;
    align-items: stretch;
    gap: 18px;
  }

  body.is-menu-open .global-nav {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 104px 24px 64px;
  }

  .hero__copy {
    width: 100%;
    padding-top: 18px;
    margin-left: 0;
  }

  .hero h1 {
    font-size: 34px;
    line-height: 1.7;
  }

  .hero__copy > p:not(.eyebrow) {
    width: 100%;
    font-size: 16px;
  }

  .hero__actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero__visual {
    position: relative;
    inset: auto;
    width: 100%;
    height: 360px;
    margin-top: 38px;
  }

  .hero__visual::before {
    background: linear-gradient(180deg, rgba(255,255,255,0.45), rgba(255,255,255,0));
  }

  .hero__piano-ornament {
    position: relative;
    left: auto;
    bottom: auto;
    margin-top: 20px;
    width: 260px;
  }

  .score-band {
    margin-top: 44px;
    padding: 16px 0;
  }

  .score-band::before {
    height: 150px;
    background-size: 100% 150px;
  }

  .section {
    padding: 72px 0;
  }

  .split,
  .split--reverse,
  .site-footer__inner,
  .contact-panel {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .split--reverse .photo-collage {
    order: 2;
  }

  .service-cards {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

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

  .service-cards article {
    padding: 28px 16px;
  }

  .lesson-photos {
    position: static;
    aspect-ratio: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .lesson-photos img {
    position: static;
    width: 100%;
    border-width: 4px;
  }

  .lesson-photos img:nth-child(1) {
    grid-row: span 2;
    aspect-ratio: 3 / 4.6;
  }

  .lesson-photos img:nth-child(2),
  .lesson-photos img:nth-child(3) {
    aspect-ratio: 4 / 3;
  }

  /* モバイルは重なりを解除して並べる */
  .photo-collage {
    position: static;
    aspect-ratio: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .photo-collage img {
    position: static;
    width: 100%;
  }

  .photo-collage__wide {
    grid-column: 1 / -1;
    aspect-ratio: 16 / 10;
  }

  .photo-collage__a,
  .photo-collage__b {
    border-width: 4px;
  }

  .school-intro {
    padding: 86px 24px 78px;
  }

  .section-ornament--service,
  .school-ornament,
  .price-cta__leaf,
  .cta-band__leaf,
  .scroll-hint {
    display: none;
  }

  .price-cta,
  .cta-band {
    padding: 72px 24px;
  }

  .footer-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .to-top {
    right: 24px;
  }

  .copyright {
    text-align: left;
  }
}

/* スクロール遅延表示：JS有効時は最初から隠した状態で描画 → reveal-showで下からフワッと */
.has-js .hero__copy,
.has-js .hero__visual,
.has-js .scroll-hint,
.has-js .section-copy,
.has-js .center-heading,
.has-js .portrait-card,
.has-js .photo-collage,
.has-js .lesson-photos,
.has-js .service-cards,
.has-js .school-title,
.has-js .school-intro__body,
.has-js .cta-band__inner,
.has-js .perf-deco {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 1.9s cubic-bezier(0.22, 1, 0.36, 1),
    transform 1.9s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.has-js .reveal-show {
  opacity: 1;
  transform: none;
}

/* 実績セクション：音符＋線・花＋線のオリジナル装飾 */
.achievements {
  position: relative;
}

.achievements .section__inner {
  position: relative;
  z-index: 1;
}

.perf-deco {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.perf-deco__line {
  position: absolute;
  left: 0;
  top: 6%;
  width: 100%;
  height: 80%;
  overflow: visible;
}

.perf-deco__line path {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 2.6s ease;
}

.perf-deco.reveal-show .perf-deco__line path {
  stroke-dashoffset: 0;
}

.perf-deco__item {
  position: absolute;
  height: auto;
  opacity: 0.9;
}

.perf-deco__notes {
  left: 27%;
  top: 64%;
  width: 180px;
}

.perf-deco__flower {
  left: 4%;
  top: 47%;
  width: 84px;
}

@media (max-width: 768px) {
  .perf-deco {
    display: none;
  }
}