/* =========================================================
   サンプルピアノ教室 おとのわ — デモサイト用スタイル
   配色: ピンク × ブルー × イエロー（ポップ・元気系）
   フォント: Mochiy Pop One（丸太め）/ Yusei Magic（手書き太字）
   モバイルファースト、PCで広がるレイアウト
   ========================================================= */

:root {
  --c-bg: #fffdf5;
  --c-bg-soft: #fff8e8;
  --c-bg-blue: #eaf5ff;
  --c-bg-pink: #ffeef4;
  --c-text: #3a2e4f;
  --c-text-soft: #6b5e85;
  --c-pink: #ff8bb3;
  --c-pink-deep: #ff5e93;
  --c-blue: #5fb8f0;
  --c-blue-deep: #2e8fd6;
  --c-yellow: #ffd84d;
  --c-yellow-deep: #f5b800;
  --c-mint: #8fdec3;
  --c-purple: #b794e8;
  --c-card: #ffffff;
  --c-border: #f0d9e4;
  --shadow-sm: 0 4px 12px rgba(255, 94, 147, 0.10);
  --shadow-md: 0 10px 28px rgba(94, 184, 240, 0.18);
  --shadow-lg: 0 16px 40px rgba(58, 46, 79, 0.12);
  --radius: 18px;
  --radius-lg: 28px;
  --radius-pill: 999px;
  --maxw: 1100px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Yusei Magic", "M PLUS Rounded 1c", -apple-system, BlinkMacSystemFont,
    "Hiragino Sans", "Yu Gothic", sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--c-pink-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: "Mochiy Pop One", "M PLUS Rounded 1c", sans-serif;
  font-weight: 400;
  line-height: 1.4;
  margin: 0 0 0.6em;
  color: var(--c-text);
}

p { margin: 0 0 1em; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== ヘッダー ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 253, 245, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 3px dashed var(--c-pink);
}

.site-header__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-text);
}

.site-header__brand-mark {
  font-size: 28px;
  display: inline-block;
  animation: bounce 2.5s ease-in-out infinite;
}

.site-header__brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-header__brand-jp {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 18px;
  color: var(--c-pink-deep);
}

.site-header__brand-en {
  font-size: 11px;
  color: var(--c-text-soft);
  letter-spacing: 0.08em;
}

.site-header__nav {
  display: flex;
  gap: 6px 18px;
  flex-wrap: wrap;
  font-size: 14px;
}

.site-header__nav a {
  color: var(--c-text);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  transition: background 0.2s;
}

.site-header__nav a:hover {
  background: var(--c-bg-pink);
  text-decoration: none;
}

.site-header__cta {
  background: var(--c-pink);
  color: #fff !important;
  padding: 8px 18px !important;
  border-radius: var(--radius-pill);
  font-weight: bold;
}

.site-header__cta:hover {
  background: var(--c-pink-deep);
  text-decoration: none !important;
}

/* ===== ヒーロー ===== */
.hero {
  position: relative;
  background:
    radial-gradient(circle at 15% 20%, var(--c-bg-pink) 0%, transparent 40%),
    radial-gradient(circle at 85% 75%, var(--c-bg-blue) 0%, transparent 45%),
    var(--c-bg);
  padding: 60px 20px 80px;
  overflow: hidden;
}

.hero__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  position: relative;
  text-align: center;
}

.hero__floats {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__float {
  position: absolute;
  font-size: 32px;
  opacity: 0.7;
  animation: float-up 6s ease-in-out infinite;
}

.hero__float--1 { top: 10%; left: 8%; animation-delay: 0s; }
.hero__float--2 { top: 25%; right: 12%; animation-delay: 1.2s; font-size: 38px; }
.hero__float--3 { top: 60%; left: 6%; animation-delay: 2.4s; }
.hero__float--4 { top: 70%; right: 8%; animation-delay: 3.6s; font-size: 36px; }
.hero__float--5 { top: 40%; left: 50%; animation-delay: 0.6s; font-size: 28px; }

.hero__eyebrow {
  display: inline-block;
  background: var(--c-yellow);
  color: var(--c-text);
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero__title {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: clamp(28px, 6vw, 48px);
  margin: 0 0 24px;
  color: var(--c-text);
}

.hero__title-accent {
  color: var(--c-pink-deep);
  position: relative;
  display: inline-block;
}

.hero__title-accent::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--c-yellow);
  border-radius: 3px;
  z-index: -1;
}

.hero__sub {
  font-size: clamp(15px, 2.5vw, 18px);
  color: var(--c-text-soft);
  margin-bottom: 36px;
  line-height: 2;
}

.hero__cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  border-radius: var(--radius-pill);
  font-weight: bold;
  text-decoration: none;
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 16px;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow-sm);
}

.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); text-decoration: none; }

.btn--primary {
  background: var(--c-pink);
  color: #fff;
}

.btn--primary:hover { background: var(--c-pink-deep); }

.btn--secondary {
  background: var(--c-blue);
  color: #fff;
}

.btn--secondary:hover { background: var(--c-blue-deep); }

.btn--yellow {
  background: var(--c-yellow);
  color: var(--c-text);
}

.btn--yellow:hover { background: var(--c-yellow-deep); }

.hero__badges {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

.hero__badge {
  background: #fff;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--c-text);
  border: 2px solid var(--c-border);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ===== セクション共通 ===== */
.section {
  padding: 80px 20px;
}

.section--soft { background: var(--c-bg-soft); }
.section--blue { background: var(--c-bg-blue); }
.section--pink { background: var(--c-bg-pink); }

.section__inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

.section__heading {
  text-align: center;
  margin-bottom: 50px;
}

.section__eyebrow {
  font-size: 13px;
  color: var(--c-pink-deep);
  letter-spacing: 0.15em;
  margin: 0 0 8px;
}

.section__title {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: clamp(24px, 4vw, 34px);
  margin: 0 0 12px;
}

.section__lead {
  color: var(--c-text-soft);
  font-size: 15px;
  max-width: 640px;
  margin: 0 auto;
}

/* ===== こんなお子様向け ===== */
.target-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.target-card {
  background: var(--c-card);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 3px solid transparent;
  transition: transform 0.2s, border-color 0.2s;
}

.target-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-pink);
}

.target-card__icon {
  font-size: 44px;
  margin-bottom: 12px;
  display: inline-block;
}

.target-card__title {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 17px;
  margin: 0 0 10px;
  color: var(--c-pink-deep);
}

.target-card__text {
  font-size: 14px;
  color: var(--c-text-soft);
  line-height: 1.7;
  margin: 0;
}

/* ===== コース紹介（タブ） ===== */
.course-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.course-tab {
  background: #fff;
  border: 3px solid var(--c-border);
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 14px;
  cursor: pointer;
  color: var(--c-text-soft);
  transition: all 0.2s;
}

.course-tab:hover {
  border-color: var(--c-pink);
}

.course-tab[aria-selected="true"] {
  background: var(--c-pink);
  border-color: var(--c-pink);
  color: #fff;
}

.course-panel {
  display: none;
  background: var(--c-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-md);
  animation: fade-in 0.4s ease;
}

.course-panel[aria-hidden="false"] {
  display: block;
}

.course-panel__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 24px;
}

@media (min-width: 720px) {
  .course-panel__top {
    grid-template-columns: 180px 1fr;
  }
}

.course-panel__visual {
  background: linear-gradient(135deg, var(--c-bg-pink), var(--c-bg-blue));
  border-radius: var(--radius);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 70px;
}

.course-panel__title {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 22px;
  color: var(--c-pink-deep);
  margin: 0 0 6px;
}

.course-panel__age {
  display: inline-block;
  background: var(--c-yellow);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  margin-bottom: 12px;
}

.course-panel__desc {
  color: var(--c-text-soft);
  font-size: 15px;
  margin: 0;
}

.course-panel__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  padding: 20px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
  margin-top: 16px;
}

.course-meta__item {
  text-align: center;
}

.course-meta__label {
  font-size: 12px;
  color: var(--c-text-soft);
  display: block;
  margin-bottom: 4px;
}

.course-meta__value {
  font-family: "Mochiy Pop One", sans-serif;
  color: var(--c-blue-deep);
  font-size: 16px;
}

.course-panel__features {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.course-panel__features li {
  position: relative;
  padding: 8px 0 8px 28px;
  border-bottom: 1px dashed var(--c-border);
  font-size: 14px;
}

.course-panel__features li::before {
  content: "♪";
  position: absolute;
  left: 4px;
  top: 8px;
  color: var(--c-pink-deep);
  font-size: 18px;
}

/* ===== 講師紹介 ===== */
.teacher-card {
  background: var(--c-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
  max-width: 820px;
  margin: 0 auto;
}

@media (min-width: 720px) {
  .teacher-card { grid-template-columns: 200px 1fr; }
}

.teacher-card__avatar {
  background: linear-gradient(135deg, var(--c-bg-pink), var(--c-bg-blue));
  width: 200px;
  height: 200px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 90px;
  margin: 0 auto;
  border: 6px solid #fff;
  box-shadow: var(--shadow-md);
}

.teacher-card__name {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 22px;
  color: var(--c-pink-deep);
  margin: 0 0 6px;
}

.teacher-card__role {
  color: var(--c-text-soft);
  font-size: 14px;
  margin-bottom: 14px;
}

.teacher-card__bio {
  font-size: 14px;
  color: var(--c-text-soft);
  margin-bottom: 14px;
  line-height: 1.9;
}

.teacher-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.teacher-tag {
  background: var(--c-bg-blue);
  color: var(--c-blue-deep);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
}

/* ===== 月謝・料金 ===== */
.fee-table {
  background: var(--c-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
}

.fee-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 460px;
}

.fee-table th,
.fee-table td {
  padding: 14px 12px;
  text-align: left;
  border-bottom: 1px dashed var(--c-border);
}

.fee-table th {
  background: var(--c-bg-pink);
  color: var(--c-pink-deep);
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 13px;
}

.fee-table td:last-child {
  text-align: right;
  font-family: "Mochiy Pop One", sans-serif;
  color: var(--c-blue-deep);
  white-space: nowrap;
}

.fee-notes {
  margin-top: 20px;
  padding: 18px 20px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--c-text-soft);
  line-height: 1.9;
}

.fee-notes h3 {
  font-size: 14px;
  margin: 0 0 8px;
  color: var(--c-text);
}

.fee-notes ul {
  margin: 0;
  padding-left: 1.2em;
}

.fee-notes li {
  margin-bottom: 4px;
}

/* ===== 発表会 ===== */
.recital-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

@media (min-width: 720px) {
  .recital-grid { grid-template-columns: 1fr 1fr; }
}

.recital-visual {
  background: linear-gradient(135deg, var(--c-purple), var(--c-pink));
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.recital-visual::before,
.recital-visual::after {
  content: "★";
  position: absolute;
  font-size: 24px;
  color: var(--c-yellow);
  animation: twinkle 2s ease-in-out infinite;
}

.recital-visual::before { top: 20px; left: 24px; }
.recital-visual::after { bottom: 20px; right: 24px; animation-delay: 1s; }

.recital-visual__icon {
  font-size: 60px;
  margin-bottom: 12px;
}

.recital-visual__title {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 22px;
  margin: 0 0 6px;
}

.recital-visual__sub {
  font-size: 13px;
  opacity: 0.95;
  margin: 0;
}

.recital-text h3 {
  font-family: "Mochiy Pop One", sans-serif;
  color: var(--c-pink-deep);
  font-size: 20px;
  margin-bottom: 14px;
}

.recital-text p {
  font-size: 14px;
  color: var(--c-text-soft);
  line-height: 1.9;
}

.recital-text__notice {
  font-size: 12px;
  color: var(--c-text-soft);
  background: var(--c-bg-soft);
  padding: 12px 14px;
  border-radius: var(--radius);
  margin-top: 14px;
}

/* ===== 無料体験 CTA ===== */
.trial-cta {
  background: linear-gradient(135deg, var(--c-pink) 0%, var(--c-purple) 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 50px 30px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.trial-cta__title {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: clamp(22px, 4vw, 30px);
  color: #fff;
  margin: 0 0 12px;
}

.trial-cta__sub {
  font-size: 15px;
  margin-bottom: 24px;
  opacity: 0.95;
}

.trial-cta__list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  max-width: 700px;
  margin: 0 auto 28px;
  text-align: left;
}

.trial-cta__item {
  background: rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.trial-cta__item-icon {
  font-size: 22px;
}

.trial-cta__notice {
  font-size: 12px;
  opacity: 0.85;
  margin-top: 16px;
}

/* ===== お問い合わせフォーム ===== */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
  background: var(--c-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-md);
}

.contact-form__field {
  margin-bottom: 18px;
}

.contact-form__label {
  display: block;
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 13px;
  color: var(--c-text);
  margin-bottom: 6px;
}

.contact-form__required {
  color: var(--c-pink-deep);
  font-size: 11px;
  margin-left: 6px;
}

.contact-form__input,
.contact-form__select,
.contact-form__textarea {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  background: #fff;
  color: var(--c-text);
  transition: border-color 0.2s;
}

.contact-form__input:focus,
.contact-form__select:focus,
.contact-form__textarea:focus {
  outline: none;
  border-color: var(--c-pink);
}

.contact-form__textarea {
  min-height: 120px;
  resize: vertical;
}

.contact-form__consent {
  background: var(--c-bg-pink);
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--c-text);
  margin-bottom: 20px;
  line-height: 1.7;
}

.contact-form__consent label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  cursor: pointer;
}

.contact-form__consent input { margin-top: 4px; }

.contact-form__submit {
  width: 100%;
  background: var(--c-pink);
  color: #fff;
  border: none;
  padding: 16px;
  border-radius: var(--radius-pill);
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s;
}

.contact-form__submit:hover {
  background: var(--c-pink-deep);
}

.contact-form__sample-notice {
  text-align: center;
  font-size: 12px;
  color: var(--c-text-soft);
  margin-top: 14px;
}

/* ===== フッター ===== */
.site-footer {
  background: var(--c-text);
  color: #fff;
  padding: 50px 20px 24px;
}

.site-footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

@media (min-width: 720px) {
  .site-footer__inner { grid-template-columns: 1.4fr 1fr 1fr; }
}

.site-footer__brand-name {
  font-family: "Mochiy Pop One", sans-serif;
  font-size: 18px;
  color: var(--c-yellow);
  margin: 0 0 10px;
}

.site-footer__addr {
  font-size: 13px;
  line-height: 1.9;
  opacity: 0.85;
}

.site-footer h4 {
  color: var(--c-yellow);
  font-size: 14px;
  margin: 0 0 12px;
  font-family: "Mochiy Pop One", sans-serif;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  line-height: 2;
  opacity: 0.85;
}

.site-footer a {
  color: #fff;
  text-decoration: none;
}

.site-footer a:hover { text-decoration: underline; }

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: 30px;
  padding-top: 20px;
  text-align: center;
  font-size: 12px;
  opacity: 0.7;
}

/* ===== 特商法 ===== */
.legal-block {
  background: var(--c-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  color: var(--c-text-soft);
  line-height: 1.9;
}

.legal-block dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin: 0;
}

@media (min-width: 600px) {
  .legal-block dl {
    grid-template-columns: 160px 1fr;
    gap: 12px 18px;
  }
}

.legal-block dt {
  font-family: "Mochiy Pop One", sans-serif;
  color: var(--c-text);
  font-size: 13px;
}

.legal-block dd {
  margin: 0 0 6px;
}

/* ===== アニメーション ===== */
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes float-up {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.7; }
  50% { transform: translateY(-20px) rotate(8deg); opacity: 1; }
}

@keyframes twinkle {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.1); }
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* アニメーション抑制設定の尊重 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== 印刷時 (LP は最小限) ===== */
@media print {
  .site-header, .site-footer, .hero__floats { display: none; }
}