:root {
  --ink: #18242d;
  --navy: #123047;
  --blue: #29627d;
  --pale: #eaf3f6;
  --line: #cedce2;
  --white: #fff;
  --serif: "Noto Serif JP", serif;
  --sans: "Noto Sans JP", sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  background: #fff;
}
a {
  color: inherit;
  text-decoration: none;
}
.site-header {
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(24px, 5vw, 80px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  z-index: 20;
}
.brand {
  display: flex;
  align-items: center;
  gap: 13px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--navy);
  color: #fff;
  font-family: Georgia, serif;
  font-size: 21px;
}
.brand strong {
  display: block;
  font-family: var(--serif);
  font-size: 16px;
  letter-spacing: 0.08em;
}
.brand small {
  display: block;
  font-size: 9px;
  letter-spacing: 0.18em;
  color: #61727e;
}
.site-header nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
  font-weight: 500;
}
.site-header nav > a:hover {
  color: var(--blue);
}
.nav-cta {
  border: 1px solid var(--navy);
  padding: 10px 17px;
}
.menu-button {
  display: none;
  background: none;
  border: 0;
  font: inherit;
}
.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(360px, 0.8fr);
  align-items: center;
  padding: 70px clamp(24px, 8vw, 130px);
  gap: 7vw;
  background: linear-gradient(90deg, #fff 0 68%, var(--pale) 68%);
}
.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.25em;
}
.hero h1,
.section h2,
.cta-section h2 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0.03em;
}
.hero h1 {
  font-size: clamp(36px, 4vw, 62px);
  margin: 0 0 25px;
}
.hero h1 em {
  font-style: normal;
  color: var(--blue);
  border-bottom: 2px solid #8fb9ca;
}
.lead {
  max-width: 700px;
  color: #4d606c;
  font-size: 17px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 35px;
}
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 55px;
  padding: 0 25px;
  font-weight: 600;
}
.primary {
  background: var(--navy);
  color: #fff;
}
.primary:hover {
  background: #1c4862;
}
.text-link {
  color: var(--blue);
  font-weight: 600;
}
.note {
  font-size: 13px;
  color: #667983;
  margin-top: 18px;
}
.hero-score {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}
.score-label {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: #68818c;
}
.staff {
  height: 220px;
  margin: 22px -8vw 22px -4vw;
}
.staff-notation {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.staff-lines {
  stroke: #afcbd4;
  stroke-width: 1.25;
  shape-rendering: geometricPrecision;
}
.score-clef {
  fill: var(--navy);
  font-family: "Noto Music", "Bravura", "Segoe UI Symbol", serif;
  font-size: 112px;
}
.engraved-notes {
  fill: var(--blue);
  stroke: var(--blue);
}
.notehead {
  stroke: none;
}
.note-stem {
  fill: none;
  stroke-width: 3.4;
  stroke-linecap: butt;
}
.beam {
  fill: var(--blue);
}
.barline {
  stroke: #8fb2c0;
  stroke-width: 2;
}
.hero-score > p {
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1.7;
  text-align: right;
}
.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 1180px;
  margin: -34px auto 0;
  background: #fff;
  box-shadow: 0 12px 45px rgba(28, 55, 67, 0.1);
  position: relative;
  z-index: 2;
}
.trust-strip div {
  padding: 25px 35px;
  border-right: 1px solid var(--line);
}
.trust-strip div:last-child {
  border: 0;
}
.trust-strip strong,
.trust-strip span {
  display: block;
}
.trust-strip strong {
  font-family: var(--serif);
  font-size: 18px;
}
.trust-strip span {
  font-size: 12px;
  color: #657784;
}
.section {
  padding: 110px clamp(24px, 8vw, 130px);
  scroll-margin-top: 88px;
}
.section-heading h2 {
  font-size: clamp(30px, 3.2vw, 46px);
  margin: 0;
}
.section-intro {
  max-width: 630px;
  color: #5e707a;
  margin: 22px 0 45px;
}
.lesson-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.lesson {
  background: #fff;
  padding: 42px;
}
.lesson.featured {
  background: var(--pale);
}
.lesson > span,
.access article > span {
  font-size: 12px;
  color: var(--blue);
  letter-spacing: 0.15em;
}
.lesson h3,
.access h3 {
  font-family: var(--serif);
  font-size: 24px;
  margin: 12px 0;
}
.lesson p {
  color: #536671;
}
.lesson a,
.fee-table a {
  color: var(--blue);
  font-weight: 600;
}
.results {
  background: var(--navy);
  color: #fff;
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 9vw;
}
.section-heading.light .eyebrow {
  color: #92c3d6;
}
.results-body > p {
  color: #c6d7df;
  max-width: 650px;
}
.result-list {
  margin-top: 40px;
  border-top: 1px solid #446074;
}
.result-list div {
  display: grid;
  grid-template-columns: 70px 1.3fr 1fr;
  gap: 24px;
  padding: 19px 0;
  border-bottom: 1px solid #446074;
  align-items: center;
}
.result-list time {
  color: #90bdce;
}
.result-list span {
  font-size: 13px;
  color: #b5cbd5;
}
.results-note {
  font-size: 13px !important;
}
.teacher {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 10vw;
  align-items: center;
}
.teacher-card p:not(.eyebrow) {
  color: #536671;
}
.teacher blockquote {
  margin: 0;
  background: var(--pale);
  padding: 60px 50px;
  font-family: var(--serif);
  font-size: 24px;
  line-height: 2;
}
.teacher blockquote span {
  font-size: 80px;
  line-height: 0.5;
  color: #80aec1;
  display: block;
}
.fees {
  background: #f5f8f9;
}
.fee-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 45px;
}
.fee-main,
.fee-table {
  background: #fff;
  padding: 45px;
}
.fee-main > span {
  display: block;
  font-weight: 600;
}
.fee-main strong {
  display: block;
  font-family: var(--serif);
  font-size: 52px;
  color: var(--blue);
  margin: 10px 0;
}
.fee-main p {
  color: #60727d;
}
.fee-table > div {
  display: flex;
  justify-content: space-between;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}
.fee-table small {
  display: block;
  color: #6a7c86;
  margin: 18px 0;
}
.access-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 44px;
}
.access article {
  border-top: 3px solid var(--navy);
  background: var(--pale);
  padding: 32px;
}
.access article p {
  color: #536671;
}
.cta-section {
  text-align: center;
  padding: 110px 24px;
  background: #dcecf1;
}
.cta-section h2 {
  font-size: clamp(30px, 3.4vw, 48px);
  margin: 0;
}
.cta-section > p:not(.eyebrow) {
  color: #556973;
  margin: 24px auto 32px;
}
footer {
  background: #0c202e;
  color: #fff;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
  padding: 55px clamp(24px, 8vw, 130px);
}
footer .brand-mark {
  background: #fff;
  color: var(--navy);
}
footer .brand small {
  color: #9ab0bb;
}
footer > div:nth-child(2) {
  display: flex;
  gap: 24px;
  font-size: 13px;
}
footer > small {
  grid-column: 1/-1;
  color: #78909c;
  font-size: 11px;
}
@media (max-width: 900px) {
  .site-header {
    height: 72px;
    padding: 0 20px;
  }
  .menu-button {
    display: block;
  }
  .site-header nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 20px 24px;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.08);
  }
  .site-header nav.open {
    display: flex;
  }
  .hero {
    grid-template-columns: 1fr;
    padding-top: 65px;
    background: linear-gradient(#fff 0 67%, var(--pale) 67%);
    min-height: auto;
  }
  .hero-score {
    min-height: 330px;
  }
  .trust-strip {
    margin: 0;
    grid-template-columns: 1fr;
  }
  .trust-strip div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .results,
  .teacher {
    grid-template-columns: 1fr;
  }
  .section {
    padding-top: 80px;
    padding-bottom: 80px;
  }
  .access-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 620px) {
  body {
    font-size: 16px;
  }
  .brand small {
    display: none;
  }
  .hero {
    padding-left: 22px;
    padding-right: 22px;
  }
  .hero h1 {
    font-size: 34px;
  }
  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 12px;
  }
  .lesson-grid,
  .fee-layout {
    grid-template-columns: 1fr;
  }
  .lesson,
  .fee-main,
  .fee-table {
    padding: 30px 24px;
  }
  .section {
    padding-left: 22px;
    padding-right: 22px;
  }
  .result-list div {
    grid-template-columns: 55px 1fr;
    gap: 12px;
  }
  .result-list span {
    grid-column: 2;
  }
  .teacher blockquote {
    padding: 45px 30px;
    font-size: 21px;
  }
  footer {
    grid-template-columns: 1fr;
  }
  footer > div:nth-child(2) {
    flex-direction: column;
    gap: 10px;
  }
}

/* Articles */
.articles {
  background: #f5f8f9;
}
.articles-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8vw;
  align-items: end;
  margin-bottom: 46px;
}
.articles-heading > p {
  max-width: 560px;
  margin: 0 0 8px;
  color: #536671;
}
.article-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.article-card {
  display: flex;
  flex-direction: column;
  min-height: 340px;
  padding: 36px;
  background: #fff;
}
.article-card.featured-article {
  background: var(--pale);
}
.article-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 0 0 30px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
}
.article-card h3 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.6;
}
.article-card h3 a:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}
.article-card > p:not(.article-meta) {
  margin: 0;
  color: #536671;
}
.article-link {
  margin-top: auto;
  padding-top: 25px;
  color: var(--blue);
  font-weight: 600;
}
.articles-footer {
  margin-top: 25px;
  text-align: right;
}
@media (max-width: 900px) {
  .articles-heading {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .article-list {
    grid-template-columns: 1fr;
  }
  .article-card {
    min-height: auto;
  }
  .article-link {
    margin-top: 25px;
  }
}
@media (max-width: 620px) {
  .article-card {
    padding: 30px 24px;
  }
}