:root {
  --black: #080808;
  --near-black: #111111;
  --white: #f7f7f3;
  --paper: #efefe9;
  --gray: #bcbcb5;
  --line: rgba(8, 8, 8, 0.18);
  --line-light: rgba(247, 247, 243, 0.28);
  --sans: "Manrope", Arial, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: "DM Mono", Consolas, monospace;
  --page: min(100% - 64px, 1240px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--black);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 5000;
  pointer-events: none;
  content: "";
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9000;
  padding: 10px 16px;
  transform: translateY(-140%);
  border: 2px solid var(--white);
  background: var(--black);
  color: var(--white);
  font: 500 12px var(--mono);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  min-height: 78px;
  border-bottom: 1px solid var(--black);
  background: rgba(239, 239, 233, 0.94);
  backdrop-filter: blur(14px);
}

.brand,
.desktop-nav,
.header-action {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  padding-left: max(32px, calc((100vw - 1240px) / 2));
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.045em;
}

.brand img {
  width: 38px;
  height: 38px;
}

.desktop-nav {
  height: 100%;
  border-right: 1px solid var(--black);
  border-left: 1px solid var(--black);
}

.desktop-nav a {
  display: grid;
  height: 100%;
  min-width: 106px;
  place-items: center;
  border-right: 1px solid var(--line);
  font: 500 11px var(--mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  transition: background 180ms, color 180ms;
}

.desktop-nav a:last-child {
  border-right: 0;
}

.desktop-nav a:hover {
  background: var(--black);
  color: var(--white);
}

.desktop-nav a.nav-tool {
  display: flex;
  gap: 8px;
  background: var(--black);
  color: var(--white);
}

.desktop-nav a.nav-tool:hover {
  background: #d7ff42;
  color: var(--black);
}

.header-action {
  justify-content: flex-end;
  gap: 18px;
  padding-right: max(32px, calc((100vw - 1240px) / 2));
  font: 500 12px var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.header-action span {
  font-size: 20px;
}

.header-tool-action {
  background: var(--black);
  color: var(--white);
}

.header-tool-action:hover {
  background: #d7ff42;
  color: var(--black);
}

.menu-button,
.mobile-nav {
  display: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(500px, 0.92fr);
  min-height: 750px;
  border-bottom: 1px solid var(--black);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  padding: 42px max(40px, calc((100vw - 1240px) / 2)) 48px;
}

.eyebrow-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 42px;
}

.eyebrow,
.eyebrow-row > span {
  margin: 0;
  font: 500 11px var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before {
  display: inline-block;
  width: 24px;
  height: 1px;
  margin: 0 12px 3px 0;
  background: currentColor;
  content: "";
}

.hero h1 {
  margin: auto 0;
  font: 500 clamp(92px, 8.6vw, 148px)/0.76 var(--sans);
  letter-spacing: -0.09em;
  text-transform: uppercase;
}

.hero h1 em {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.045em;
  text-transform: none;
}

.hero-bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-top: 64px;
}

.hero-intro {
  max-width: 510px;
  margin: 0;
  font-size: 17px;
  line-height: 1.7;
}

.circle-link {
  display: flex;
  flex: 0 0 86px;
  width: 86px;
  height: 86px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--black);
  border-radius: 50%;
  font: 500 10px var(--mono);
  text-transform: uppercase;
  transition: background 180ms, color 180ms;
}

.circle-link strong {
  margin-top: 6px;
  font-size: 18px;
}

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

.hero-console {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 34px;
  overflow: hidden;
  background: var(--black);
  color: var(--white);
}

.hero-console::after {
  position: absolute;
  right: -160px;
  bottom: -130px;
  width: 420px;
  height: 420px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  box-shadow: 0 0 0 80px rgba(255, 255, 255, 0.035), 0 0 0 160px rgba(255, 255, 255, 0.02);
  content: "";
}

.console-topline,
.console-footer {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font: 400 10px var(--mono);
  letter-spacing: 0.08em;
}

.status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--white);
}

.track-title {
  position: relative;
  z-index: 1;
  margin: auto 0 30px;
  padding-top: 80px;
  border-top: 1px solid var(--line-light);
}

.track-title p,
.track-title span {
  margin: 0;
  color: var(--gray);
  font: 400 11px var(--mono);
  text-transform: uppercase;
}

.track-title h2 {
  margin: 8px 0 16px;
  font: 400 clamp(62px, 5.8vw, 94px)/0.9 var(--serif);
  letter-spacing: -0.045em;
}

.notation {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  border-top: 1px solid var(--line-light);
  border-left: 1px solid var(--line-light);
}

.beat {
  display: flex;
  min-width: 0;
  height: 112px;
  flex-direction: column;
  justify-content: space-between;
  padding: 10px;
  border-right: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.beat span {
  color: var(--gray);
  font: 400 8px var(--mono);
}

.beat b {
  font: 400 30px var(--serif);
}

.beat.active {
  background: var(--white);
  color: var(--black);
}

.keyboard {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  height: 124px;
  margin: 18px 0 0;
  border: 1px solid var(--white);
  background: var(--white);
  isolation: isolate;
  touch-action: none;
  user-select: none;
}

.piano-key {
  appearance: none;
  border-radius: 0;
  cursor: pointer;
  font: 400 9px var(--mono);
  -webkit-tap-highlight-color: transparent;
}

.white-key {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  border: 0;
  border-right: 1px solid var(--black);
  background: var(--white);
  box-shadow: inset 0 -5px 0 #d3d3cf;
  color: var(--black);
  transition: background 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.white-key.last-white-key {
  border-right: 0;
}

.white-key:hover,
.white-key.is-active {
  background: #deded9;
  box-shadow: inset 0 -1px 0 #bdbdb8;
  transform: translateY(4px);
}

.white-key:focus-visible {
  z-index: 4;
  outline: 2px solid var(--black);
  outline-offset: -5px;
}

.black-key {
  position: absolute;
  top: -1px;
  left: calc((100% / 7) * var(--key-position));
  z-index: 3;
  display: flex;
  width: 8.5%;
  height: 64%;
  align-items: flex-end;
  justify-content: center;
  padding: 0 0 8px;
  border: 1px solid #353532;
  background: var(--black);
  box-shadow: inset 0 -5px 0 #30302d;
  color: #a8a8a3;
  transform: translateX(-50%);
  transition: background 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.black-key:hover,
.black-key.is-active {
  background: #343431;
  box-shadow: inset 0 -1px 0 #51514d;
  color: var(--white);
  transform: translateX(-50%) translateY(4px);
}

.black-key:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: -5px;
}

.keyboard-help {
  min-height: 15px;
  margin: 8px 0 18px;
  color: #aaa9a4;
  font: 400 9px var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.console-footer {
  gap: 18px;
}

.play-button {
  min-height: 42px;
  padding: 0 20px;
  border: 1px solid var(--white);
  background: var(--white);
  color: var(--black);
  cursor: pointer;
  font: 500 10px var(--mono);
  text-transform: uppercase;
  transition: background 150ms ease, color 150ms ease;
}

.play-button:hover,
.play-button:focus-visible {
  background: #d3d3cf;
}

.play-button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.console-footer a {
  margin-left: auto;
  border-bottom: 1px solid var(--white);
  padding-bottom: 3px;
}

.ticker {
  overflow: hidden;
  border-bottom: 1px solid var(--black);
  background: var(--white);
}

.ticker > div {
  display: flex;
  width: max-content;
  align-items: center;
  gap: 34px;
  padding: 16px 0;
  animation: ticker 24s linear infinite;
  font: 500 12px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ticker i {
  font-size: 8px;
}

@keyframes ticker {
  to { transform: translateX(-50%); }
}

.song-library {
  padding: 120px max(32px, calc((100vw - 1240px) / 2));
  background: var(--black);
  color: var(--white);
}

.section-heading {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 80px;
  margin-bottom: 80px;
}

.section-heading h2,
.method h2,
.practice h2,
.final-cta h2 {
  margin: 26px 0 0;
  font: 600 clamp(66px, 7.5vw, 112px)/0.82 var(--sans);
  letter-spacing: -0.08em;
  text-transform: uppercase;
}

.section-heading h2 em,
.method h2 em,
.practice h2 em,
.final-cta h2 em {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.04em;
  text-transform: none;
}

.section-heading > p {
  max-width: 410px;
  align-self: end;
  margin: 0;
  color: var(--gray);
  font-size: 16px;
  line-height: 1.7;
}

.library-search {
  margin-bottom: 26px;
}

.library-search label {
  display: block;
  margin-bottom: 12px;
  font: 400 10px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  border: 1px solid var(--white);
}

.search-row input {
  min-width: 0;
  height: 76px;
  padding: 0 24px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--white);
  font-size: 18px;
}

.search-row input::placeholder {
  color: #777;
}

.search-row button {
  min-width: 160px;
  border: 0;
  border-left: 1px solid var(--white);
  background: var(--white);
  color: var(--black);
  cursor: pointer;
  font: 500 11px var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.filter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 20px 0 42px;
  font: 400 10px var(--mono);
  letter-spacing: 0.06em;
}

.filter-row > span {
  margin-right: 10px;
  color: var(--gray);
}

.filter-button {
  padding: 9px 14px;
  border: 1px solid #555;
  border-radius: 999px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font: 400 10px var(--mono);
  text-transform: uppercase;
}

.filter-button.active,
.filter-button:hover {
  border-color: var(--white);
  background: var(--white);
  color: var(--black);
}

.results-message {
  min-height: 18px;
  margin: -20px 0 20px;
  color: var(--gray);
  font: 400 10px var(--mono);
  text-transform: uppercase;
}

.song-list {
  border-top: 1px solid var(--white);
}

.song-row {
  display: grid;
  grid-template-columns: 55px minmax(260px, 1.7fr) minmax(90px, 0.6fr) minmax(90px, 0.6fr) minmax(90px, 0.6fr) 90px;
  align-items: center;
  min-height: 118px;
  border-bottom: 1px solid var(--line-light);
  transition: background 160ms, color 160ms, padding 160ms;
}

.song-row:hover {
  padding: 0 16px;
  background: var(--white);
  color: var(--black);
}

.song-number,
.song-tag,
.song-level,
.song-key {
  font: 400 10px var(--mono);
  text-transform: uppercase;
}

.song-number {
  color: var(--gray);
}

.song-main h3 {
  margin: 0 0 4px;
  font: 400 clamp(30px, 3.2vw, 47px)/1 var(--serif);
}

.song-main h3 a {
  border: 0;
  color: inherit;
  font-weight: inherit;
}

.song-main p {
  margin: 0;
  color: var(--gray);
  font: 400 10px var(--mono);
}

.song-row:hover .song-main p,
.song-row:hover .song-number {
  color: #555;
}

.row-action {
  padding: 12px 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  cursor: pointer;
  font: 500 10px var(--mono);
  text-align: left;
  text-transform: uppercase;
}

.row-action span {
  float: right;
}

.empty-state {
  padding: 60px 0;
  border-bottom: 1px solid var(--white);
  text-align: center;
}

.empty-state button {
  padding: 12px 18px;
  border: 1px solid var(--white);
  background: transparent;
  color: var(--white);
  cursor: pointer;
}

.paths {
  padding: 120px max(32px, calc((100vw - 1240px) / 2));
  border-bottom: 1px solid var(--black);
}

.dark-heading > p {
  color: #555;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--black);
  border-left: 1px solid var(--black);
}

.path-card {
  display: flex;
  min-height: 520px;
  flex-direction: column;
  padding: 24px;
  border-right: 1px solid var(--black);
  border-bottom: 1px solid var(--black);
  background: var(--white);
  transition: transform 180ms;
}

.path-card:hover {
  transform: translateY(-10px);
}

.path-index,
.path-card > p,
.path-link {
  font: 400 10px var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.path-card > p {
  margin: auto 0 14px;
}

.path-card h3 {
  margin: 0 0 34px;
  font: 500 clamp(45px, 4.4vw, 65px)/0.9 var(--sans);
  letter-spacing: -0.07em;
  text-transform: uppercase;
}

.path-link {
  display: flex;
  justify-content: space-between;
  padding-top: 15px;
  border-top: 1px solid currentColor;
}

.path-card-dark {
  background: var(--black);
  color: var(--white);
}

.path-card-outline {
  background: transparent;
}

.piano-lines {
  display: flex;
  height: 110px;
  margin-top: 40px;
  border: 1px solid var(--black);
}

.piano-lines i {
  flex: 1;
  border-right: 1px solid var(--black);
}

.piano-lines i:last-child {
  border: 0;
}

.letter-stack {
  display: flex;
  margin-top: 44px;
}

.letter-stack span {
  display: grid;
  width: 84px;
  height: 84px;
  place-items: center;
  border: 1px solid var(--white);
  border-radius: 50%;
  margin-left: -10px;
  font: 400 36px var(--serif);
}

.letter-stack span:first-child {
  margin-left: 0;
}

.star-mark {
  margin-top: 28px;
  font: 400 112px/1 var(--serif);
}

.method {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 100px;
  padding: 120px max(32px, calc((100vw - 1240px) / 2));
  border-bottom: 1px solid var(--black);
  background: var(--white);
}

.method-title-wrap {
  position: sticky;
  top: 120px;
  align-self: start;
}

.method h2 {
  font-size: clamp(62px, 6.2vw, 94px);
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 24px;
  padding: 40px 0 55px;
  border-top: 1px solid var(--black);
}

.steps li > span {
  font: 400 11px var(--mono);
}

.steps h3 {
  margin: 0 0 18px;
  font: 500 clamp(32px, 3.3vw, 52px)/0.95 var(--sans);
  letter-spacing: -0.055em;
}

.steps p {
  max-width: 480px;
  margin: 0;
  color: #555;
  font-size: 15px;
  line-height: 1.7;
}

.practice {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 760px;
  border-bottom: 1px solid var(--black);
}

.practice-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 70px max(40px, calc((100vw - 1240px) / 2));
  overflow: hidden;
  background: var(--black);
  color: var(--white);
}

.tempo {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  border-bottom: 1px solid var(--white);
}

.tempo > span {
  grid-column: 1 / -1;
  font: 400 10px var(--mono);
}

.tempo strong {
  font: 500 clamp(160px, 18vw, 270px)/0.82 var(--sans);
  letter-spacing: -0.1em;
}

.tempo small {
  padding-bottom: 22px;
  font: 400 11px var(--mono);
}

.practice-staff {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 180px;
  margin-top: 38px;
}

.practice-staff i {
  position: absolute;
  right: 0;
  left: 0;
  height: 1px;
  background: rgba(255,255,255,0.25);
}

.practice-staff i:nth-of-type(1) { top: 35px; }
.practice-staff i:nth-of-type(2) { top: 62px; }
.practice-staff i:nth-of-type(3) { top: 89px; }
.practice-staff i:nth-of-type(4) { top: 116px; }
.practice-staff i:nth-of-type(5) { top: 143px; }

.practice-staff span {
  z-index: 1;
  padding: 0 8px;
  background: var(--black);
  font: 400 58px var(--serif);
}

.loop-control {
  position: relative;
  z-index: 2;
  padding: 18px;
  border: 1px solid var(--white);
  font: 400 10px var(--mono);
  text-align: center;
}

.loop-control span {
  margin-right: 10px;
  font-size: 18px;
}

.practice-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 90px max(40px, calc((100vw - 1240px) / 2)) 90px 80px;
}

.practice h2 {
  margin-bottom: 36px;
  font-size: clamp(64px, 6vw, 90px);
}

.practice-copy > p:not(.eyebrow) {
  max-width: 500px;
  margin: 0;
  color: #555;
  font-size: 16px;
  line-height: 1.8;
}

.practice ul {
  margin: 42px 0;
  padding: 0;
  border-top: 1px solid var(--black);
  list-style: none;
}

.practice li {
  display: grid;
  grid-template-columns: 55px 1fr;
  padding: 14px 0;
  border-bottom: 1px solid var(--black);
  font-size: 13px;
  text-transform: uppercase;
}

.practice li span {
  font: 400 10px var(--mono);
}

.practice-copy > a {
  display: flex;
  justify-content: space-between;
  width: min(100%, 310px);
  padding: 16px 0;
  border-bottom: 1px solid var(--black);
  font: 500 11px var(--mono);
  text-transform: uppercase;
}

.final-cta {
  position: relative;
  padding: 120px max(32px, calc((100vw - 1240px) / 2)) 180px;
  overflow: hidden;
  background: var(--white);
  text-align: center;
}

/* Supporting content pages */
.content-page {
  background: var(--white);
}

.page-hero {
  min-height: 620px;
  padding: 42px max(32px, calc((100vw - 1240px) / 2)) 82px;
  border-bottom: 1px solid var(--black);
  background: var(--paper);
}

.breadcrumb {
  margin-bottom: 105px;
  overflow-x: auto;
  color: #555;
  font: 400 10px var(--mono);
  letter-spacing: 0.06em;
  scrollbar-width: none;
  text-transform: uppercase;
}

.breadcrumb::-webkit-scrollbar {
  display: none;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  width: max-content;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  flex: none;
  white-space: nowrap;
}

.breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: #8a8a84;
}

.breadcrumb a {
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
}

.breadcrumb [aria-current="page"] {
  color: var(--black);
}

.page-hero h1 {
  max-width: 1050px;
  margin: 34px 0 55px;
  font: 600 clamp(82px, 9vw, 136px)/0.79 var(--sans);
  letter-spacing: -0.085em;
  text-transform: uppercase;
}

.page-hero h1 em {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.035em;
  text-transform: none;
}

.page-intro {
  width: min(100%, 670px);
  margin: 0 0 0 auto;
  font-size: 19px;
  line-height: 1.75;
}

.page-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 760px);
  justify-content: space-between;
  gap: 100px;
  padding: 100px max(32px, calc((100vw - 1240px) / 2)) 140px;
}

.page-layout.player-layout {
  grid-template-columns: minmax(0, 1120px);
  justify-content: center;
}

.player-layout .prose-content {
  width: 100%;
}

.page-aside {
  position: sticky;
  top: 118px;
  align-self: start;
  border-top: 1px solid var(--black);
}

.page-aside > p,
.page-meta span {
  margin: 0;
  padding: 15px 0;
  color: #555;
  font: 400 9px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-aside nav {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.page-aside nav a {
  display: grid;
  grid-template-columns: 36px 1fr;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.4;
}

.page-aside nav a:hover {
  padding-left: 8px;
  background: var(--black);
  color: var(--white);
}

.page-aside nav span {
  font: 400 9px var(--mono);
}

.page-meta {
  display: flex;
  flex-direction: column;
  margin-top: 50px;
  padding-top: 5px;
  border-top: 1px solid var(--black);
}

.page-meta strong {
  font: 500 11px var(--mono);
  text-transform: uppercase;
}

.prose-content {
  min-width: 0;
}

.prose-content section {
  position: relative;
  padding: 0 0 72px 76px;
  border-top: 1px solid var(--black);
  scroll-margin-top: 110px;
}

.prose-content section + section {
  padding-top: 72px;
}

.section-number {
  position: absolute;
  top: 28px;
  left: 0;
  font: 400 10px var(--mono);
}

.prose-content section + section .section-number {
  top: 100px;
}

.prose-content h2 {
  margin: 26px 0 30px;
  font: 500 clamp(42px, 4.5vw, 66px)/0.95 var(--sans);
  letter-spacing: -0.06em;
}

.prose-content section + section h2 {
  margin-top: 0;
}

.prose-content h3 {
  margin: 34px 0 12px;
  font-size: 17px;
  letter-spacing: -0.02em;
}

.prose-content p,
.prose-content li {
  color: #40403c;
  font-size: 16px;
  line-height: 1.85;
}

.prose-content p {
  margin: 0 0 22px;
}

.prose-content ul,
.prose-content ol {
  margin: 24px 0 28px;
  padding-left: 22px;
}

.prose-content li {
  margin: 9px 0;
  padding-left: 6px;
}

.prose-content a {
  border-bottom: 1px solid var(--black);
  color: var(--black);
  font-weight: 600;
}

.fact-strip,
.song-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 32px 0;
  border-top: 1px solid var(--black);
  border-left: 1px solid var(--black);
}

.fact-strip > div,
.song-facts > div {
  min-height: 108px;
  padding: 18px;
  border-right: 1px solid var(--black);
  border-bottom: 1px solid var(--black);
}

.fact-strip span,
.song-facts span,
.content-card > span,
.lesson-callout > span,
.landmark-grid span,
.level-list span {
  display: block;
  margin-bottom: 18px;
  color: #62625c;
  font: 500 9px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact-strip strong,
.song-facts strong {
  display: block;
  font-size: 14px;
  line-height: 1.45;
}

.content-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0 38px;
}

.content-card {
  display: flex;
  min-height: 270px;
  padding: 24px;
  border: 1px solid var(--black) !important;
  flex-direction: column;
  font-weight: 400 !important;
  transition: background 160ms, color 160ms, transform 160ms;
}

.content-card h3 {
  margin: 8px 0 18px;
  font: 500 31px/0.98 var(--sans);
  letter-spacing: -0.045em;
}

.content-card p {
  margin-bottom: 28px;
  font-size: 14px;
  line-height: 1.65;
}

.content-card > strong {
  margin-top: auto;
  font: 500 10px var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.content-card:hover {
  background: var(--black);
  color: var(--white);
  transform: translateY(-3px);
}

.content-card:hover p,
.content-card:hover > span {
  color: #cfcfc8;
}

.featured-card {
  grid-column: 1 / -1;
  min-height: 230px;
}

.chord-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 32px 0;
}

.chord-card {
  padding: 24px;
  border: 1px solid var(--black);
  background: var(--paper);
}

.chord-card > span {
  color: #62625c;
  font: 500 9px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.chord-card h3 {
  margin: 12px 0 0;
  font: 500 31px/1 var(--sans);
  letter-spacing: -0.045em;
}

.chord-card .note-run {
  margin: 24px 0 18px;
}

.chord-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
}

.level-list {
  margin: 28px 0 32px;
  border-top: 1px solid var(--black);
}

.level-list > div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 28px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.level-list span,
.level-list p {
  margin: 0;
}

.related-links {
  display: grid;
  margin: 30px 0;
  border-top: 1px solid var(--black);
}

.related-links a {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--black);
  font-weight: 400;
}

.related-links span {
  color: #666;
  font: 500 9px var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.related-links strong {
  font-size: 15px;
}

.lesson-callout,
.source-note {
  margin: 32px 0;
  padding: 24px 26px;
  border: 1px solid var(--black);
  background: var(--paper);
}

.lesson-callout p,
.source-note {
  margin: 0;
}

.practice-sequence {
  padding: 0 !important;
  border-top: 1px solid var(--black);
  list-style: none;
}

.practice-sequence li {
  display: grid;
  grid-template-columns: minmax(180px, 0.65fr) 1fr;
  gap: 30px;
  margin: 0;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.practice-sequence strong,
.practice-sequence span {
  display: block;
}

.table-wrap {
  max-width: 100%;
  margin: 30px 0 34px;
  overflow-x: auto;
}

.lesson-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  border-top: 1px solid var(--black);
}

.lesson-table th,
.lesson-table td {
  padding: 15px 13px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.lesson-table th {
  color: #5d5d58;
  font: 500 9px var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.lesson-table td {
  color: #40403c;
  font-size: 13px;
  line-height: 1.55;
}

.note-run {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 30px 0;
}

.note-run span {
  display: inline-flex;
  min-width: 48px;
  min-height: 58px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--black);
  background: var(--white);
  color: var(--black);
  font: 500 19px var(--mono);
}

.note-run b {
  padding: 0 4px;
  font-weight: 400;
}

.long-run span {
  min-width: 42px;
}

.keyboard-map {
  display: grid;
  grid-template-columns: repeat(7, minmax(38px, 1fr));
  height: 190px;
  margin: 34px 0;
  border-top: 1px solid var(--black);
  border-left: 1px solid var(--black);
}

.keyboard-map > div {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 16px;
  border-right: 1px solid var(--black);
  border-bottom: 1px solid var(--black);
  background: var(--white);
  font: 500 11px var(--mono);
}

.keyboard-map .black {
  position: absolute;
  z-index: 1;
  top: 0;
  left: -27%;
  width: 54%;
  height: 62%;
  background: var(--black);
}

.landmark-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 30px 0;
  border-top: 1px solid var(--black);
  border-left: 1px solid var(--black);
}

.landmark-grid > div {
  padding: 20px;
  border-right: 1px solid var(--black);
  border-bottom: 1px solid var(--black);
}

.landmark-grid strong {
  display: block;
  min-height: 52px;
  font-size: 14px;
  line-height: 1.4;
}

.landmark-grid p {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.55;
}

.song-facts {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.contact-cards {
  display: grid;
  gap: 12px;
  margin: 10px 0 34px;
}

.contact-card {
  display: grid;
  grid-template-columns: 105px 1fr auto;
  align-items: center;
  min-height: 92px;
  padding: 18px;
  border: 1px solid var(--black) !important;
  font-weight: 400 !important;
  transition: background 160ms, color 160ms;
}

.contact-card:hover {
  background: var(--black);
  color: var(--white);
}

.contact-card span,
.contact-card small {
  font: 400 9px var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.contact-card strong {
  font-size: 15px;
}

.contact-card small {
  text-align: right;
}

.final-cta > p {
  font: 500 11px var(--mono);
  letter-spacing: 0.14em;
}

.final-cta h2 {
  position: relative;
  z-index: 2;
  max-width: 1050px;
  margin: 36px auto 56px;
  font-size: clamp(74px, 9.5vw, 142px);
}

.final-cta > a {
  position: relative;
  z-index: 2;
  display: inline-flex;
  gap: 60px;
  padding: 18px 22px;
  border: 1px solid var(--black);
  background: var(--black);
  color: var(--white);
  font: 500 11px var(--mono);
  text-transform: uppercase;
}

.cta-keyboard {
  position: absolute;
  right: -5%;
  bottom: -70px;
  left: -5%;
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  height: 170px;
  transform: rotate(-2deg);
  border: 1px solid var(--black);
  background: var(--white);
}

.cta-keyboard i {
  position: relative;
  border-right: 1px solid var(--black);
}

.cta-keyboard i:not(:nth-child(3n))::after {
  position: absolute;
  top: 0;
  right: -16%;
  z-index: 1;
  width: 32%;
  height: 62%;
  background: var(--black);
  content: "";
}

.site-footer {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
  padding: 78px max(32px, calc((100vw - 1240px) / 2)) 28px;
  background: var(--black);
  color: var(--white);
}

.brand-light {
  padding-left: 0;
}

.brand-light img {
  filter: invert(1);
}

.footer-brand p {
  margin: 28px 0 0;
  color: var(--gray);
  font-size: 15px;
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.footer-links div {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links strong {
  margin-bottom: 8px;
  font: 500 10px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-links a {
  color: var(--gray);
  font-size: 13px;
}

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

.footer-bottom {
  display: flex;
  grid-column: 1 / -1;
  justify-content: space-between;
  margin-top: 45px;
  padding-top: 22px;
  border-top: 1px solid var(--line-light);
  color: var(--gray);
  font: 400 9px var(--mono);
  letter-spacing: 0.08em;
}

.preview-dialog {
  width: min(92vw, 610px);
  padding: 40px;
  border: 2px solid var(--black);
  background: var(--white);
  color: var(--black);
  box-shadow: 12px 12px 0 var(--black);
}

.preview-dialog::backdrop {
  background: rgba(0,0,0,0.72);
}

.dialog-close {
  position: absolute;
  top: 16px;
  right: 18px;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-size: 28px;
}

.preview-dialog > p:first-of-type {
  font: 400 9px var(--mono);
  letter-spacing: 0.08em;
}

.preview-dialog h2 {
  margin: 34px 0 22px;
  font: 400 58px/0.9 var(--serif);
}

.dialog-notes {
  padding: 26px 20px;
  border: 1px solid var(--black);
  font: 500 clamp(22px, 5vw, 36px) var(--mono);
  letter-spacing: 0.08em;
  text-align: center;
}

.dialog-help {
  margin: 24px 0;
  color: #555;
  font-size: 14px;
  line-height: 1.6;
}

.preview-dialog a {
  display: inline-block;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--black);
  font: 500 10px var(--mono);
  text-transform: uppercase;
}

.excerpt-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 30px 0 0;
  padding: 14px;
  border: 1px solid var(--black);
  background: var(--paper);
}

.excerpt-toolbar > span {
  color: #5a5a55;
  font: 500 9px/1.5 var(--mono);
  letter-spacing: 0.05em;
  text-align: right;
  text-transform: uppercase;
}

.excerpt-tool-link {
  padding: 12px 0 5px;
  border-bottom: 1px solid var(--black) !important;
  font: 600 9px var(--mono) !important;
  letter-spacing: 0.05em;
  white-space: nowrap;
  text-transform: uppercase;
}

.excerpt-play {
  min-width: 150px;
  padding: 14px 18px;
  border: 1px solid var(--black);
  background: var(--black);
  color: var(--white);
  cursor: pointer;
  font: 600 10px var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.excerpt-play:hover:not(:disabled),
.excerpt-play:focus-visible {
  background: var(--white);
  color: var(--black);
}

.excerpt-play:disabled {
  cursor: wait;
  opacity: 0.68;
}

.staff-scroll {
  max-width: 100%;
  overflow-x: auto;
  border: 1px solid var(--black);
  border-top: 0;
  background: var(--white);
}

.staff-scroll:focus-visible {
  outline: 3px solid var(--black);
  outline-offset: 3px;
}

.practice-staff-svg {
  display: block;
  width: 100%;
  min-width: 640px;
  color: var(--black);
}

.staff-lines line,
.ledger-line,
.excerpt-bar,
.note-stem {
  stroke: currentColor;
  stroke-width: 1.25;
}

.excerpt-bar {
  stroke-width: 1.8;
}

.excerpt-notehead {
  stroke: currentColor;
  stroke-width: 1.8;
  transition: fill 120ms, stroke 120ms, transform 120ms;
}

.note-flag {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
}

.note-dot {
  fill: currentColor;
}

.note-accidental,
.meter-label,
.staff-pitch,
.staff-finger,
.staff-row-label {
  fill: currentColor;
  font-family: var(--mono);
}

.note-accidental {
  font-size: 17px;
}

.clef-label {
  fill: currentColor;
  font: 400 52px Georgia, serif;
}

.meter-label {
  font-size: 14px;
  font-weight: 600;
  text-anchor: middle;
}

.staff-pitch,
.staff-finger {
  font-size: 10px;
  font-weight: 600;
  text-anchor: middle;
}

.staff-row-label {
  fill: #666;
  font-size: 8px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.excerpt-note.is-playing .excerpt-notehead {
  fill: #d7ff42;
  stroke-width: 3;
}

.excerpt-note-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(112px, 1fr));
  border-right: 1px solid var(--black);
  border-bottom: 1px solid var(--black);
}

.excerpt-note-list > span {
  display: flex;
  min-height: 82px;
  padding: 13px;
  border-left: 1px solid var(--black);
  border-top: 1px solid var(--black);
  flex-direction: column;
  justify-content: space-between;
  transition: background 120ms, color 120ms;
}

.excerpt-note-list b {
  font: 500 20px var(--mono);
}

.excerpt-note-list small {
  color: #666;
  font: 500 8px/1.45 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.excerpt-note-list > span.is-playing {
  background: var(--black);
  color: var(--white);
}

.excerpt-note-list > span.is-playing small {
  color: #d7ff42;
}

.excerpt-caption {
  margin-top: 16px !important;
  color: #62625c !important;
  font: 400 11px/1.65 var(--mono) !important;
}

.review-status {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  align-items: center;
  gap: 18px;
  margin: 30px 0 0;
  padding: 18px;
  border: 1px solid var(--black);
  background: var(--black);
  color: var(--white);
}

.review-status span,
.review-status small {
  color: #bdbdb6;
  font: 500 8px/1.5 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.review-status strong {
  font-size: 14px;
}

.review-grid {
  margin: 0 0 32px;
  border-left: 1px solid var(--black);
}

.review-grid > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  border-right: 1px solid var(--black);
  border-bottom: 1px solid var(--black);
}

.review-grid dt,
.review-grid dd {
  margin: 0;
  padding: 17px;
}

.review-grid dt {
  border-right: 1px solid var(--black);
  color: #5d5d58;
  font: 500 8px/1.5 var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.review-grid dd {
  color: #40403c;
  font-size: 13px;
  line-height: 1.65;
}

.review-grid small {
  color: #666;
}

.error-page {
  background: var(--paper);
}

.error-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  min-height: 720px;
  border-bottom: 1px solid var(--black);
}

.error-hero > div {
  display: flex;
  padding: 80px max(32px, calc((100vw - 1240px) / 2));
  flex-direction: column;
  justify-content: center;
}

.error-hero > div:first-child {
  padding-right: 70px;
  border-right: 1px solid var(--black);
}

.error-hero h1 {
  margin: 26px 0 0;
  font: 500 clamp(74px, 9vw, 142px)/0.76 var(--sans);
  letter-spacing: -0.08em;
  text-transform: uppercase;
}

.error-hero h1 em {
  font: 400 0.92em/0.9 var(--serif);
  letter-spacing: -0.04em;
  text-transform: none;
}

.error-copy {
  padding-left: 70px !important;
}

.error-copy > p {
  max-width: 520px;
  color: #3f3f3a;
  font-size: 18px;
  line-height: 1.7;
}

.error-links {
  display: grid;
  margin-top: 36px;
  border-top: 1px solid var(--black);
}

.error-links a {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--black);
}

.error-links a:hover {
  padding-left: 10px;
  background: var(--black);
  color: var(--white);
}

.error-links span {
  font: 500 9px var(--mono);
}

.error-links strong {
  font-size: 14px;
}

.score-player {
  margin: 34px 0 8px;
  border: 1px solid var(--black);
  background: var(--white);
  scroll-margin-top: 92px;
}

.player-heading {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) 1fr;
  border-bottom: 1px solid var(--black);
}

.player-heading > label {
  display: flex;
  padding: 22px;
  border-right: 1px solid var(--black);
  flex-direction: column;
  justify-content: center;
}

.player-heading label > span,
.player-title-block > span,
.player-transport label > span,
.player-keyboard-heading > span {
  margin-bottom: 10px;
  color: #60605a;
  font: 500 8px var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.player-heading select,
.player-transport select {
  width: 100%;
  min-height: 46px;
  padding: 0 36px 0 12px;
  border: 1px solid var(--black);
  border-radius: 0;
  background: var(--white);
  color: var(--black);
  font: 600 12px var(--sans);
}

.player-title-block {
  padding: 22px;
}

.player-title-block h3 {
  margin: 0 0 8px;
  font: 500 36px/0.95 var(--sans);
  letter-spacing: -0.05em;
}

.player-title-block p {
  margin: 0;
  font-size: 12px;
  line-height: 1.55;
}

.player-live {
  display: grid;
  grid-template-columns: 1fr 90px minmax(170px, auto);
  align-items: center;
  min-height: 70px;
  padding: 14px 20px;
  background: var(--black);
  color: var(--white);
}

.player-live span,
.player-live small {
  color: #bdbdb6;
  font: 500 8px/1.5 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.player-live strong {
  color: #d7ff42;
  font: 500 30px var(--mono);
  text-align: center;
}

.player-live small {
  text-align: right;
}

.player-score-scroll {
  max-width: 100%;
  overflow-x: auto;
  border-bottom: 1px solid var(--black);
}

.player-score-scroll:focus-visible,
.player-keyboard-scroll:focus-visible {
  outline: 3px solid var(--black);
  outline-offset: -3px;
}

.player-score-track {
  display: flex;
  min-width: max-content;
}

.player-score-note {
  display: grid;
  grid-template-columns: 1fr auto;
  min-width: 135px;
  min-height: 154px;
  padding: 16px;
  border: 0;
  border-right: 1px solid var(--black);
  background: var(--white);
  color: var(--black);
  cursor: pointer;
  text-align: left;
}

.player-score-note > span,
.player-score-note small,
.player-score-note em {
  color: #666;
  font: 500 8px/1.4 var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.player-score-note b {
  align-self: start;
  font: 500 31px var(--mono);
  text-align: right;
}

.player-score-note small,
.player-score-note em {
  grid-column: 1 / -1;
  align-self: end;
}

.player-score-note em {
  font-style: normal;
}

.player-score-note:hover,
.player-score-note:focus-visible {
  background: var(--paper);
}

.player-score-note.is-active {
  background: #d7ff42;
}

.player-score-note.is-active > span,
.player-score-note.is-active small,
.player-score-note.is-active em {
  color: #30302c;
}

.player-progress-wrap {
  padding: 19px 20px 14px;
  border-bottom: 1px solid var(--black);
  background: var(--paper);
}

.player-progress-wrap input {
  width: 100%;
  height: 28px;
  margin: 0;
  accent-color: var(--black);
  cursor: ew-resize;
}

.player-progress-wrap > div {
  display: flex;
  justify-content: space-between;
  font: 500 8px var(--mono);
}

.player-transport {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 120px 1fr;
  border-bottom: 1px solid var(--black);
}

.player-transport button,
.player-transport > a,
.player-transport > label {
  min-height: 72px;
  border: 0;
  border-right: 1px solid var(--black);
}

.player-transport button {
  padding: 0 18px;
  cursor: pointer;
  font: 600 10px var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.player-play {
  background: var(--black);
  color: var(--white);
}

.player-play:hover,
.player-play:focus-visible {
  background: #d7ff42;
  color: var(--black);
}

.player-restart {
  background: var(--white);
  color: var(--black);
}

.player-restart:hover,
.player-restart:focus-visible {
  background: var(--paper);
}

.player-transport > label {
  display: flex;
  padding: 9px 12px;
  flex-direction: column;
  justify-content: center;
}

.player-transport label > span {
  margin-bottom: 4px;
}

.player-transport select {
  min-height: 38px;
}

.player-transport > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  border-bottom: 0;
  font: 600 9px var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.player-transport > a:hover {
  background: var(--black);
  color: var(--white);
}

.player-keyboard-heading {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 20px;
}

.player-keyboard-heading > span {
  margin: 0;
}

.player-keyboard-heading strong {
  font: 500 9px var(--mono);
  text-transform: uppercase;
}

.player-keyboard-scroll {
  max-width: 100%;
  padding: 0 20px 20px;
  overflow-x: auto;
}

.learning-keyboard {
  position: relative;
  display: flex;
  width: 980px;
  height: 220px;
  border-top: 1px solid var(--black);
  border-left: 1px solid var(--black);
  background: var(--white);
}

.player-key {
  cursor: pointer;
  font: 500 8px var(--mono);
  transition: background 90ms, color 90ms, transform 90ms;
}

.player-key.white-key {
  position: relative;
  display: flex;
  min-width: 0;
  flex: 1;
  align-items: flex-end;
  justify-content: center;
  padding: 0 0 14px;
  border: 0;
  border-right: 1px solid var(--black);
  border-bottom: 1px solid var(--black);
  background: var(--white);
  color: var(--black);
}

.player-key.black-key {
  position: absolute;
  z-index: 2;
  top: 0;
  left: var(--key-left);
  display: flex;
  width: 28px;
  height: 132px;
  align-items: flex-end;
  justify-content: center;
  padding: 0 0 11px;
  transform: translateX(-50%);
  border: 1px solid var(--black);
  background: var(--black);
  color: var(--white);
}

.player-key:hover,
.player-key:focus-visible {
  background: #d8d8d1;
  color: var(--black);
}

.player-key.black-key:hover,
.player-key.black-key:focus-visible {
  background: #444;
  color: var(--white);
}

.player-key.is-active,
.player-key.black-key.is-active {
  z-index: 3;
  background: #d7ff42;
  color: var(--black);
  transform: translateY(3px);
}

.player-key.black-key.is-active {
  transform: translateX(-50%) translateY(3px);
}

.player-help {
  margin: 0 !important;
  padding: 0 20px 22px;
  color: #62625c !important;
  font: 400 10px/1.6 var(--mono) !important;
}

.player-song-catalog {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 32px 0;
}

.player-song-catalog article {
  display: flex;
  min-height: 260px;
  padding: 22px;
  border: 1px solid var(--black);
  flex-direction: column;
}

.player-song-catalog article > span {
  color: #62625c;
  font: 500 8px var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.player-song-catalog h3 {
  margin: 24px 0 14px;
  font: 500 32px/0.96 var(--sans);
  letter-spacing: -0.05em;
}

.player-song-catalog p {
  margin-bottom: 24px;
  font-size: 13px;
  line-height: 1.6;
}

.player-song-catalog article > div {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: auto;
}

.player-song-catalog article a {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border: 1px solid var(--black);
  font: 600 8px var(--mono);
  text-transform: uppercase;
}

.player-song-catalog article a.catalog-play {
  background: var(--black);
  color: var(--white);
}

.player-song-catalog article a:hover {
  background: #d7ff42;
  color: var(--black);
}

@media (max-width: 1120px) {
  .desktop-nav a { min-width: 90px; }
  .hero { grid-template-columns: 0.9fr 1.1fr; }
  .hero h1 { font-size: clamp(78px, 8vw, 112px); }
  .hero-copy { padding-right: 32px; }
  .hero-console { padding: 28px; }
  .section-heading { gap: 50px; }
  .path-card h3 { font-size: 46px; }
  .method { gap: 55px; }
  .practice-copy { padding-left: 55px; }
  .song-row { grid-template-columns: 45px minmax(220px, 1.6fr) repeat(3, minmax(80px, 0.6fr)) 78px; }
}

@media (max-width: 820px) {
  :root { --page: min(100% - 32px, 720px); }
  .site-header {
    grid-template-columns: 1fr auto;
    min-height: 68px;
  }
  .brand { padding-left: 16px; }
  .desktop-nav,
  .header-action { display: none; }
  .menu-button {
    display: flex;
    width: 68px;
    height: 68px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 7px;
    border: 0;
    border-left: 1px solid var(--black);
    background: transparent;
  }
  .menu-button span {
    width: 22px;
    height: 1px;
    background: var(--black);
    transition: transform 180ms;
  }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .mobile-nav {
    display: none;
    grid-column: 1 / -1;
    border-top: 1px solid var(--black);
    background: var(--paper);
  }
  .mobile-nav.open { display: block; }
  .mobile-nav a {
    display: flex;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid var(--black);
    font: 600 20px var(--sans);
    text-transform: uppercase;
  }
  .mobile-nav span { font: 400 10px var(--mono); }
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .hero-copy { min-height: 650px; padding: 34px 20px 42px; }
  .eyebrow-row { padding-bottom: 50px; }
  .hero h1 { font-size: clamp(78px, 18vw, 120px); }
  .hero-bottom { margin-top: 55px; }
  .hero-console { min-height: 680px; padding: 24px 20px; }
  .track-title { padding-top: 65px; }
  .track-title h2 { font-size: 74px; }
  .song-library,
  .paths { padding: 90px 20px; }
  .section-heading { grid-template-columns: 1fr; gap: 34px; margin-bottom: 58px; }
  .section-heading h2 { font-size: clamp(62px, 15vw, 96px); }
  .section-heading > p { align-self: auto; }
  .song-row {
    grid-template-columns: 42px 1fr auto;
    gap: 12px;
    padding: 22px 0;
  }
  .song-row:hover { padding: 22px 10px; }
  .song-main { grid-column: 2 / 3; }
  .song-tag,
  .song-key { display: none; }
  .song-level { grid-column: 2; grid-row: 2; color: var(--gray); }
  .row-action { grid-column: 3; grid-row: 1 / 3; min-width: 64px; }
  .path-grid { grid-template-columns: 1fr; }
  .path-card { min-height: 460px; }
  .path-card h3 { font-size: clamp(46px, 12vw, 70px); }
  .method { grid-template-columns: 1fr; gap: 60px; padding: 90px 20px; }
  .method-title-wrap { position: static; }
  .method h2 { font-size: clamp(60px, 15vw, 96px); }
  .practice { grid-template-columns: 1fr; }
  .practice-visual { min-height: 630px; padding: 60px 20px; }
  .practice-copy { padding: 90px 20px; }
  .practice h2 { font-size: clamp(60px, 14vw, 92px); }
  .final-cta { padding: 95px 20px 170px; }
  .final-cta h2 { font-size: clamp(64px, 16vw, 105px); }
  .site-footer { grid-template-columns: 1fr; padding: 68px 20px 24px; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
  .page-hero { min-height: 540px; padding: 32px 20px 66px; }
  .breadcrumb { margin-bottom: 75px; }
  .page-hero h1 { font-size: clamp(62px, 15vw, 100px); }
  .page-intro { margin-left: 0; font-size: 17px; }
  .page-layout { grid-template-columns: 1fr; gap: 65px; padding: 76px 20px 100px; }
  .page-aside { position: static; }
  .page-aside nav { display: grid; grid-template-columns: 1fr 1fr; }
  .page-aside nav a:nth-child(odd) { border-right: 1px solid var(--line); }
  .page-meta { margin-top: 30px; }
  .song-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .landmark-grid { grid-template-columns: 1fr; }
  .review-status { grid-template-columns: 90px 1fr; }
  .review-status small { grid-column: 2; }
  .error-hero { grid-template-columns: 1fr; min-height: auto; }
  .error-hero > div { min-height: 500px; padding: 70px 20px; }
  .error-hero > div:first-child { padding-right: 20px; border-right: 0; border-bottom: 1px solid var(--black); }
  .error-copy { padding-left: 20px !important; }
  .player-heading { grid-template-columns: 1fr; }
  .player-heading > label { border-right: 0; border-bottom: 1px solid var(--black); }
  .player-transport { grid-template-columns: 1fr 1fr; }
  .player-transport > *:nth-child(2) { border-right: 0; }
  .player-transport > *:nth-child(-n+2) { border-bottom: 1px solid var(--black); }
  .player-live { grid-template-columns: 1fr 70px; }
  .player-live small { grid-column: 1 / -1; margin-top: 8px; text-align: left; }
}

@media (max-width: 520px) {
  .hero-copy { min-height: 585px; }
  .hero h1 { font-size: clamp(68px, 21vw, 96px); }
  .hero-intro { font-size: 15px; }
  .circle-link { flex-basis: 72px; width: 72px; height: 72px; }
  .hero-console { min-height: 610px; }
  .track-title h2 { font-size: 59px; }
  .notation { grid-template-columns: repeat(4, 1fr); }
  .beat { height: 78px; }
  .keyboard { height: 105px; }
  .console-footer { flex-wrap: wrap; }
  .console-footer > span { display: none; }
  .console-footer a { margin-left: auto; }
  .search-row { grid-template-columns: 1fr; }
  .search-row input { height: 64px; }
  .search-row button { height: 52px; border-top: 1px solid var(--white); border-left: 0; }
  .filter-row { flex-wrap: wrap; }
  .filter-row > span { width: 100%; }
  .section-heading h2 { font-size: clamp(55px, 16vw, 80px); }
  .song-main h3 { font-size: 31px; }
  .steps li { grid-template-columns: 44px 1fr; gap: 12px; }
  .steps h3 { font-size: 32px; }
  .tempo strong { font-size: 150px; }
  .practice-staff span { font-size: 42px; }
  .footer-links { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .preview-dialog { padding: 32px 22px; }
  .page-hero { min-height: 500px; }
  .page-hero h1 { font-size: clamp(54px, 16.5vw, 78px); }
  .page-hero h1 .long-word { font-size: 0.86em; }
  .page-aside nav { grid-template-columns: 1fr; }
  .page-aside nav a:nth-child(odd) { border-right: 0; }
  .prose-content section,
  .prose-content section + section { padding: 54px 0 56px; }
  .section-number,
  .prose-content section + section .section-number { position: static; display: block; margin-bottom: 20px; }
  .prose-content h2 { font-size: 42px; }
  .contact-card { grid-template-columns: 1fr; gap: 8px; }
  .contact-card small { text-align: left; }
  .content-card-grid,
  .chord-grid { grid-template-columns: 1fr; }
  .featured-card { grid-column: auto; }
  .content-card { min-height: 235px; }
  .fact-strip,
  .song-facts { grid-template-columns: 1fr; }
  .level-list > div,
  .related-links a,
  .practice-sequence li { grid-template-columns: 1fr; gap: 10px; }
  .keyboard-map { height: 155px; }
  .note-run span,
  .long-run span { min-width: 39px; min-height: 52px; font-size: 16px; }
  .excerpt-toolbar { align-items: stretch; flex-direction: column; }
  .excerpt-toolbar > span { text-align: left; }
  .excerpt-play { width: 100%; }
  .excerpt-note-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .review-status { grid-template-columns: 1fr; }
  .review-status small { grid-column: auto; }
  .review-grid > div { grid-template-columns: 1fr; }
  .review-grid dt { border-right: 0; border-bottom: 1px solid var(--line); }
  .error-hero > div { min-height: 430px; }
  .error-hero h1 { font-size: clamp(64px, 19vw, 92px); }
  .player-title-block h3 { font-size: 31px; }
  .player-live { grid-template-columns: 1fr 60px; }
  .player-score-note { min-width: 122px; min-height: 144px; }
  .player-transport { grid-template-columns: 1fr; }
  .player-transport > * { border-right: 0 !important; border-bottom: 1px solid var(--black) !important; }
  .player-transport > a { border-bottom: 0 !important; }
  .player-keyboard-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
  .learning-keyboard { width: 900px; height: 200px; }
  .player-song-catalog { grid-template-columns: 1fr; }
  .player-song-catalog article { min-height: 240px; }
  .player-song-catalog article > div { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ticker > div { animation: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}