:root {
  color-scheme: light;
  --night: #10181b; --night-2: #18242a; --on-night: #f3efe6; --on-night-2: #aeb9b8;
  --varnish: #5cc8f5; --blue: #4a5be6; --btn: linear-gradient(120deg, #2f5ce6 0%, #7a3ee0 55%, #b8329f 100%); --vivid: linear-gradient(90deg, #45c8f0 0%, #8f7cff 48%, #ff6fb5 100%);
  --paper: #f4f7fa; --card: #ffffff; --ink: #121a22; --ink-2: #536170; --rule: #d8dfe7;
  --tool: #2452c2; --lesson: #7f2fc0; --school: #c2410c;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Instrument Sans", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.55 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, p { margin: 0; }
:focus-visible { outline: 2px solid var(--varnish); outline-offset: 3px; border-radius: 3px; }
.wrap { width: min(1200px, 100% - 64px); margin-inline: auto; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; z-index: 9; background: #fff; padding: 8px 14px; }

.top { position: absolute; inset: 0 0 auto; z-index: 5; display: flex; justify-content: space-between; align-items: center; padding: 24px 32px; color: var(--on-night); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 400 25px/1 var(--serif); }
.mark { flex: none; }
.top nav { display: flex; gap: 30px; font-size: 15px; }
.top nav a { text-decoration: none; opacity: .82; }
.top nav a:hover { opacity: 1; color: var(--varnish); }

.hero { background: radial-gradient(90% 90% at 50% 112%, #2a2660 0, var(--night) 66%); color: var(--on-night); padding-top: 136px; overflow: hidden; }
.eyebrow { color: var(--on-night-2); font-size: 14px; letter-spacing: .04em; }
.hero h1, .inst-hero h1 { font: 400 clamp(62px, 9.4vw, 136px)/.95 var(--serif); letter-spacing: -.02em; margin: 18px 0 24px; }
.inst-hero h1 { font-size: clamp(46px, 6.4vw, 88px); line-height: 1; letter-spacing: -.015em; margin: 14px 0 6px; }
h1 em { color: var(--varnish); background: var(--vivid); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; padding-right: .06em; }
.lede { max-width: 590px; font-size: 20px; color: #d6d9d3; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 32px; }
.btn { display: inline-block; padding: 12px 24px; border-radius: 99px; border: 1px solid currentColor; text-decoration: none; font-weight: 500; font-size: 16px; }
.btn.primary { background: var(--btn); border-color: transparent; color: #fff; }
.btn:hover { transform: translateY(-1px); }
.sound { margin-left: 8px; background: none; border: 0; color: var(--on-night-2); font: inherit; font-size: 14px; cursor: pointer; text-decoration: underline; text-underline-offset: 4px; padding: 10px 4px; }
.sound[aria-pressed="true"] { color: var(--varnish); }

.staff { display: block; width: 100%; height: auto; margin-top: -14px; }
.lines path { fill: none; stroke: var(--on-night-2); stroke-width: 1; opacity: .55; stroke-dasharray: 1; animation: draw 2s cubic-bezier(.6, 0, .2, 1) var(--d) both; }
.note { color: var(--on-night); cursor: pointer; animation: rise .6s ease calc(.9s + var(--i) * 70ms) both; }
.note ellipse { fill: currentColor; }
.note line { stroke: currentColor; stroke-width: 1.6; }
.note text { fill: currentColor; font: 500 16px var(--sans); paint-order: stroke; stroke: var(--night); stroke-width: 6px; stroke-linejoin: round; }
.note g { transition: transform .25s ease; }
.note:hover, .note:focus-visible { color: var(--varnish); outline: none; }
.note:hover g, .note:focus-visible g { transform: translateY(-7px); }
@keyframes draw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }
.index { display: none; }

.choose { padding: 112px 0 40px; }
.choose h2, .cat-head h2 { font: 400 clamp(38px, 4.8vw, 60px)/1.05 var(--serif); letter-spacing: -.01em; }
.paths { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 36px; }
.path { display: flex; flex-direction: column; min-height: 300px; padding: 32px; border-radius: 6px; color: #fff; text-decoration: none; transition: transform .25s ease; }
.path:hover { transform: translateY(-4px); }
.path { --staff: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 600 150' preserveAspectRatio='none'%3E%3Cg fill='none' stroke='%23fff' stroke-opacity='.3' vector-effect='non-scaling-stroke'%3E%3Cpath d='M0 90C150 90 220 20 330 20S500 70 600 50'/%3E%3Cpath d='M0 104C150 104 220 38 330 38S500 86 600 68'/%3E%3Cpath d='M0 118C150 118 220 56 330 56S500 102 600 86'/%3E%3Cpath d='M0 132C150 132 220 74 330 74S500 118 600 104'/%3E%3Cpath d='M0 146C150 146 220 92 330 92S500 134 600 122'/%3E%3C/g%3E%3C/svg%3E"); background-image: var(--staff); background-repeat: no-repeat; background-size: 100% 46%; background-position: 0 66%; }
.path.tool { background-color: #1f4fd0; background-image: var(--staff), linear-gradient(135deg, #1f45c8 0%, #1f8fd6 100%); background-size: 100% 46%, cover; background-position: 0 66%, 0 0; }
.path.lesson { background-color: #6a2fd0; background-image: var(--staff), linear-gradient(135deg, #5a2cc8 0%, #b0309c 100%); background-size: 100% 46%, cover; background-position: 0 66%, 0 0; }
.path .kicker { color: inherit; opacity: .85; }
.path strong { font: 400 clamp(36px, 4.2vw, 56px)/1.05 var(--serif); margin-top: 12px; }
.path .flow { margin-top: auto; font-size: 18px; }
.path i { font-style: normal; opacity: .6; margin: 0 5px; }
.kicker { font-size: 14px; color: var(--ink-2); }

.catalog { padding: 76px 0 110px; }
.cat-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 22px; border-bottom: 1px solid var(--ink); padding-bottom: 22px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button { font: 500 14px var(--sans); color: var(--ink); background: transparent; border: 1px solid var(--rule); border-radius: 99px; padding: 8px 15px; cursor: pointer; }
.chips button:hover { border-color: var(--ink); }
.chips button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.movement { --c: var(--tool); padding-top: 68px; }
.movement.lesson { --c: var(--lesson); }
.movement.school { --c: var(--school); }
.movement[hidden] { display: none; }
.mv-head { display: grid; grid-template-columns: 90px 1fr 1.1fr; gap: 24px; align-items: end; padding-bottom: 22px; }
.num { font: italic 400 58px/.9 var(--serif); color: var(--c); }
.mv-head h3 { font: 400 40px/1.05 var(--serif); margin-top: 4px; }
.mv-intro { color: var(--ink-2); font-size: 16px; }
.mv-intro small { display: block; margin-top: 6px; font-size: 14px; color: var(--c); font-weight: 500; }
.app { display: grid; grid-template-columns: 72px 1fr auto; gap: 22px; align-items: center; padding: 20px 0; border-top: 1px solid var(--rule); }
.app[hidden] { display: none; }
.icon { width: 72px; height: 72px; border-radius: 16px; box-shadow: 0 1px 3px #0002; }
.tile { display: grid; place-items: center; background: var(--night-2); color: var(--varnish); font: 400 38px/1 var(--serif); }
.app h4 { font: 600 19px/1.3 var(--sans); }
.app h4 a { text-decoration: none; }
.app h4 a:hover { color: var(--c); }
.app-text p { color: var(--ink-2); font-size: 15.5px; max-width: 610px; }
.app-text .meta, .meta { font-size: 14px; margin-top: 3px; color: var(--ink-2); }
.star { color: #a8730f; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: flex-end; }
.store { display: inline-flex; gap: 6px; padding: 9px 15px; border: 1px solid var(--ink); border-radius: 99px; font: 500 14px var(--sans); text-decoration: none; white-space: nowrap; }
.store:hover { background: var(--ink); color: var(--paper); }
.soon { font-size: 14px; color: var(--ink-2); padding: 9px 4px; white-space: nowrap; }
.soon.quiet { font-size: 13px; }


.foot { background: var(--night); color: var(--on-night-2); border-top: 1px solid #2a363a; padding: 56px 0 28px; font-size: 15px; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1.3fr; gap: 32px; }
.foot .brand { color: var(--on-night); }
.foot p { margin-top: 12px; max-width: 340px; }
.foot h2 { font: 600 14px var(--sans); color: var(--on-night); margin-bottom: 10px; }
.foot-grid > div > a:not(.brand) { display: block; padding: 3px 0; text-decoration: none; }
.foot-grid > div > a:not(.brand):hover { color: var(--varnish); }
.foot .legal { max-width: none; margin-top: 40px; font-size: 13px; }

.inst-hero { background: var(--night); color: var(--on-night); padding: 136px 0 64px; }
.inst-hero a { color: var(--varnish); }
.details { padding: 24px 0 96px; }
.detail { --c: var(--tool); padding: 52px 0; border-bottom: 1px solid var(--rule); }
.detail.lesson { --c: var(--lesson); }
.detail.school { --c: var(--school); }
.detail:last-child { border: 0; }
.detail-head { display: flex; gap: 20px; align-items: center; }
.detail .kicker { color: var(--c); font-weight: 500; }
.detail h2 { font: 400 clamp(28px, 3.4vw, 40px)/1.1 var(--serif); }
.detail-text { max-width: 720px; margin: 22px 0; }
.detail .actions { justify-content: flex-start; }
.shots { display: flex; gap: 14px; overflow-x: auto; margin-top: 30px; padding-bottom: 12px; scrollbar-width: thin; }
.shots img { height: 380px; width: auto; flex: none; border-radius: 10px; border: 1px solid var(--rule); background: var(--card); }

@media (max-width: 860px) {
  .wrap { width: calc(100% - 32px); }
  .top { padding: 18px 16px; }
  .hero { padding-top: 136px; }
  .sound { margin-left: 0; }
  .note text { display: none; }
  .note { pointer-events: none; }
  .staff { width: 190%; margin-left: -45%; margin-top: 10px; }
  .index { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 0 36px; }
  .index a { padding: 8px 13px; border: 1px solid #4a5a5e; border-radius: 99px; font-size: 14px; text-decoration: none; }
  .choose { padding-top: 68px; }
  .paths { grid-template-columns: 1fr; }
  .path { min-height: 230px; padding: 24px; }
  .mv-head { grid-template-columns: 1fr; gap: 8px; }
  .num { font-size: 40px; }
  .app { grid-template-columns: 56px 1fr; gap: 14px; align-items: start; }
  .app .icon { width: 56px; height: 56px; border-radius: 13px; }
  .tile { font-size: 30px; }
  .actions { grid-column: 2; justify-content: flex-start; }
  .foot-grid { grid-template-columns: 1fr; }
  .shots img { height: 300px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

.page-hero { padding-bottom: 48px; }
.page-hero h1 { font-size: clamp(40px, 5.2vw, 68px); margin-bottom: 0; }
.prose { max-width: 760px; padding: 56px 0 96px; }
.prose > p:first-child { color: var(--ink-2); font-size: 15px; }
.prose h2 { font: 400 32px/1.15 var(--serif); margin: 44px 0 12px; }
.prose h3 { font: 600 19px/1.3 var(--sans); margin: 26px 0 8px; }
.prose h4 { font: 600 17px/1.3 var(--sans); margin: 20px 0 6px; }
.prose p { margin: 0 0 14px; }
.prose ul { padding-left: 22px; margin: 0 0 16px; }
.prose li { margin-bottom: 6px; }
.prose a { color: var(--lesson); overflow-wrap: anywhere; }
.contact-grid { display: grid; grid-template-columns: 1.7fr 1fr; gap: 64px; padding: 56px 0 96px; }
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.contact label { display: grid; gap: 6px; font-size: 15px; font-weight: 500; min-width: 0; }
.contact .full { grid-column: 1 / -1; }
.contact input, .contact select, .contact textarea { width: 100%; font: 400 16px/1.4 var(--sans); color: var(--ink); background: var(--card); border: 1px solid #b9b2a3; border-radius: 6px; padding: 11px 12px; }
.contact textarea { resize: vertical; }
.contact button { cursor: pointer; font-family: var(--sans); }
.status { margin-top: 12px; font-size: 15px; color: var(--ink-2); }
.contact-side h2 { font: 400 32px/1.1 var(--serif); margin-bottom: 12px; }
.contact-side p { margin-bottom: 14px; color: var(--ink-2); }
.contact-side a { color: var(--lesson); overflow-wrap: anywhere; }
@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact { grid-template-columns: 1fr; }
}

.more { font: 500 14px var(--sans); padding: 9px 8px; text-underline-offset: 4px; white-space: nowrap; }
.more:hover { color: var(--c, var(--lesson)); }
.detail h2 a { text-decoration: none; }
.detail h2 a:hover { color: var(--c); }
.app-hero { background: radial-gradient(70% 110% at 82% 60%, #2a2660 0, var(--night) 70%); color: var(--on-night); padding: 120px 0 64px; overflow: hidden; }
.app-hero-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 40px; align-items: center; }
.app-hero .eyebrow a { color: var(--varnish); }
.app-title { display: flex; align-items: center; gap: 20px; margin: 22px 0 18px; }
.app-title .icon { width: 88px; height: 88px; border-radius: 20px; flex: none; }
.app-hero h1 { font: 400 clamp(34px, 4.4vw, 58px)/1.05 var(--serif); letter-spacing: -.01em; }
.app-hero .lede { font-size: 19px; }
.app-hero .meta { color: var(--on-night-2); margin-top: 10px; }
.app-hero .actions { justify-content: flex-start; margin-top: 24px; }
.app-hero .store { border-color: var(--on-night); padding: 11px 20px; font-size: 15px; }
.app-hero .store:hover { background: var(--blue); border-color: var(--blue); color: #fff; }
.app-hero .soon { color: var(--varnish); font-size: 16px; }
.visual { display: flex; justify-content: center; }
.art { width: min(100%, 400px); height: auto; filter: drop-shadow(0 24px 40px #0007); }
.phone { max-height: 430px; width: auto; border-radius: 16px; box-shadow: 0 24px 50px #0008; }
.shots.big { margin-top: 44px; }
.shots.big img { height: 460px; }
.app-body { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 72px; padding-bottom: 96px; }
.app-body .prose { padding-top: 40px; padding-bottom: 0; }
.app-body .prose h3 { font: 400 30px/1.15 var(--serif); margin: 36px 0 10px; }
.app-side { padding-top: 48px; }
.app-side h2 { font: 600 15px var(--sans); margin: 0 0 10px; }
.app-side ul { list-style: none; margin: 0 0 32px; padding: 0; }
.app-side li { padding: 8px 0; border-top: 1px solid var(--rule); font-size: 15px; }
.app-side a { color: var(--lesson); }
@media (max-width: 860px) {
  .app-hero { padding: 132px 0 44px; }
  .app-hero-grid, .app-body { grid-template-columns: 1fr; gap: 24px; }
  .app-title .icon { width: 64px; height: 64px; border-radius: 15px; }
  .visual { display: none; }
  .shots.big img { height: 340px; }
  .app-body .prose { padding-top: 16px; }
  .app-side { padding-top: 8px; }
}
.app-body .prose > p:first-child { color: var(--ink); font-size: 17px; }

.foot-grid { grid-template-columns: 1.5fr 1fr 1.25fr 1.25fr; }
.foot-inst { grid-column: auto; }
.inst-hero .lede { margin-top: 14px; max-width: 720px; }
.overview { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; padding: 64px 0 12px; }
.overview h2, .apps-h { font: 400 34px/1.1 var(--serif); margin-bottom: 14px; }
.overview ul { margin: 0; padding-left: 20px; }
.overview li { margin-bottom: 9px; }
.apps-h { padding-top: 40px; margin-bottom: 0; }
.faq { padding-top: 16px; }
.faq h2 { margin-top: 0; font-size: 34px; }
@media (max-width: 860px) {
  .foot-grid { grid-template-columns: 1fr; }
  .overview { grid-template-columns: 1fr; gap: 32px; padding-top: 44px; }
}

.top-right { display: flex; align-items: center; gap: 26px; }
.lang { position: relative; font-size: 15px; }
.lang summary { list-style: none; cursor: pointer; opacity: .82; white-space: nowrap; }
.lang summary::-webkit-details-marker { display: none; }
.lang summary::after { content: " ▾"; font-size: 11px; }
.lang[open] summary, .lang summary:hover { opacity: 1; color: var(--varnish); }
.lang-menu { position: absolute; right: 0; top: calc(100% + 10px); z-index: 20; min-width: 160px; padding: 8px; background: var(--night-2); border: 1px solid #34454a; border-radius: 8px; box-shadow: 0 14px 30px #0006; }
.lang-menu a { display: block; padding: 7px 10px; border-radius: 5px; text-decoration: none; color: var(--on-night); }
.lang-menu a:hover, .lang-menu a[aria-current] { background: #2a2650; color: var(--varnish); }
:root:lang(zh-Hant), :root:lang(zh-Hans), :root:lang(ja), :root:lang(ko) { --serif: "Songti TC", "Songti SC", "Hiragino Mincho ProN", "Yu Mincho", "Apple SD Gothic Neo", "Noto Serif CJK TC", serif; --sans: "Instrument Sans", "PingFang TC", "PingFang SC", "Hiragino Sans", "Apple SD Gothic Neo", "Noto Sans CJK TC", "Microsoft JhengHei", system-ui, sans-serif; }
:lang(zh-Hant) em, :lang(zh-Hans) em, :lang(ja) em, :lang(ko) em { font-style: normal; }
:lang(zh-Hant) .hero h1, :lang(zh-Hans) .hero h1, :lang(ja) .hero h1, :lang(ko) .hero h1 { line-height: 1.15; letter-spacing: 0; font-size: clamp(50px, 7.4vw, 108px); }
@media (max-width: 860px) { .top-right { gap: 14px; } }

.movement.upcoming { --c: var(--ink-2); }
@media (max-width: 860px) {
  .top { flex-wrap: wrap; row-gap: 12px; }
  .top-right { display: contents; }
  .lang { margin-left: auto; }
  .top nav { order: 3; flex: 0 0 100%; display: flex; gap: 20px; overflow-x: auto; scrollbar-width: none; white-space: nowrap; padding-bottom: 2px; font-size: 14px; }
  .top nav::-webkit-scrollbar { display: none; }
  .inst-hero { padding-top: 132px; }
}

.inst-hero .lede { font-size: 19px; }
.hub-cta { margin-top: 26px; }
.inst-hero .hub-cta a { color: #fff; }
.apps-h { scroll-margin-top: 24px; }
:lang(zh-Hant) .inst-hero h1, :lang(zh-Hans) .inst-hero h1, :lang(ja) .inst-hero h1, :lang(ko) .inst-hero h1 { font-size: clamp(38px, 5.2vw, 72px); line-height: 1.15; letter-spacing: 0; }
:lang(zh-Hant) .app-hero h1, :lang(zh-Hans) .app-hero h1, :lang(ja) .app-hero h1, :lang(ko) .app-hero h1 { font-size: clamp(30px, 3.8vw, 50px); line-height: 1.2; letter-spacing: 0; }
:lang(zh-Hant) .page-hero h1, :lang(zh-Hans) .page-hero h1, :lang(ja) .page-hero h1, :lang(ko) .page-hero h1 { font-size: clamp(36px, 4.6vw, 60px); line-height: 1.2; }
@media (max-width: 860px) { .inst-hero .lede { font-size: 17px; } }