:root {
  color-scheme: light;
  --ink: #161616;
  --muted: #60636b;
  --paper: #f8f8f5;
  --panel: #ffffff;
  --line: rgba(22, 22, 22, 0.12);
  --teal: #0f766e;
  --signal: #d8422f;
  --blue: #4267d6;
  --yellow: #f3bd3f;
  --shadow: 0 26px 70px rgba(18, 22, 28, 0.14);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
}

body::selection {
  color: #fff;
  background: var(--teal);
}

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

.scroll-meter {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 60;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--signal), var(--yellow));
  transform-origin: left;
}

.hero {
  position: relative;
  min-height: auto;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(260px, 0.65fr) minmax(520px, 1.35fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(28px, 4vw, 52px) clamp(20px, 5vw, 72px) clamp(34px, 5vw, 60px);
  color: #fff;
  background: #111;
  isolation: isolate;
}

.hero-content {
  width: 100%;
}

.eyebrow,
.section-kicker,
.step-label,
.media-caption p {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 0.75rem;
  font-weight: 780;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #86f0dc;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 880px;
  margin-bottom: 16px;
  font-size: clamp(3.3rem, 7.5vw, 7.2rem);
  line-height: 0.92;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 620px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(1rem, 1.8vw, 1.22rem);
  line-height: 1.7;
}

.hero-byline {
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(1.15rem, 2.2vw, 1.65rem);
  line-height: 1.4;
}

.hero .piano-console {
  width: min(112%, 1040px);
  justify-self: end;
  color: #fff;
}

.section {
  width: min(1160px, calc(100% - 32px));
  margin-inline: auto;
  padding: clamp(72px, 9vw, 118px) 0;
}

.intro-grid,
.build-layout,
.code-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
}

.section-copy h2,
.section-heading h2,
.demo-copy h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.section-copy p:not(.section-kicker),
.demo-copy p:not(.section-kicker),
.step-copy p:not(.step-label) {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.78;
}

.stats-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.stats-panel div {
  min-height: 170px;
  padding: clamp(18px, 3vw, 28px);
  background: var(--panel);
  transition: transform 220ms ease, background 220ms ease;
}

.stats-panel div:hover {
  background: #fbfbf9;
  transform: translateY(-3px);
}

.stats-panel span {
  display: block;
  margin-bottom: 34px;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 820;
  line-height: 0.9;
}

.stats-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 720;
  text-transform: uppercase;
}

.materials-panel {
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.materials-panel p {
  margin: 0 0 18px;
  color: var(--ink);
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  line-height: 1.5;
}

.materials-panel ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.55;
}

.piano-section {
  padding: clamp(72px, 9vw, 118px) 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(240, 244, 240, 0.96)),
    #eef2ee;
}

.piano-section-inner {
  width: min(1240px, calc(100% - 32px));
  margin-inline: auto;
}

.piano-console {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
  padding: 0;
}

.piano-toolbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: clamp(10px, 1.6vw, 16px);
}

.piano-toolbar h3 {
  margin: 0;
  color: #fff;
  font-size: clamp(0.9rem, 1.2vw, 1.15rem);
  line-height: 1.2;
  letter-spacing: 0;
}

.piano-readout {
  display: grid;
  justify-items: end;
  min-width: min(260px, 100%);
  gap: 5px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 760;
}

.piano-readout span:first-child {
  color: var(--ink);
  font-size: clamp(1.2rem, 2vw, 1.8rem);
  font-weight: 840;
}

.piano-stage {
  perspective: none;
}

.piano-viewport {
  position: relative;
  aspect-ratio: 3340 / 1682;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius);
  background: #191919;
  box-shadow: 0 34px 86px rgba(0, 0, 0, 0.34);
  transition: box-shadow 220ms ease;
}

.piano-viewport:focus-within,
.piano-viewport:hover {
  box-shadow: 0 38px 96px rgba(0, 0, 0, 0.42);
}

.piano-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: left center;
  user-select: none;
}

.piano-key-layer {
  position: absolute;
  left: 8.2%;
  right: 1.1%;
  bottom: 7.6%;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 0.35%;
  height: 31%;
  padding-inline: 0.2%;
}

.piano-key-button {
  display: grid;
  min-width: 0;
  min-height: 0;
  align-items: end;
  justify-items: center;
  padding: 0 0 10%;
  border: 1px solid transparent;
  border-radius: 5px;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  appearance: none;
  transition: background 140ms ease, border-color 140ms ease;
}

.piano-key-button span {
  padding: 4px 7px;
  border: 1px solid rgba(22, 22, 22, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 8px 18px rgba(18, 22, 28, 0.14);
  font-size: clamp(0.65rem, 1.3vw, 0.84rem);
  font-weight: 850;
  line-height: 1;
}

.piano-key-button:hover,
.piano-key-button.is-active {
  border-color: transparent;
  background: transparent;
}

.piano-key-button:focus-visible {
  outline: 3px solid rgba(66, 103, 214, 0.7);
  outline-offset: 3px;
}

.piano-key-button.is-active {
  transform: none;
}

.process-section {
  display: grid;
  gap: clamp(40px, 7vw, 86px);
  width: min(1240px, calc(100% - 32px));
  margin-inline: auto;
  padding: clamp(72px, 9vw, 118px) 0;
}

.process-entry {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.process-copy {
  max-width: 920px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.2rem, 2.2vw, 2rem);
  font-weight: 400;
  line-height: 1.5;
}

.process-media {
  display: grid;
  gap: 16px;
}

.process-media img,
.process-media video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(22, 22, 22, 0.1);
  border-radius: 0;
  background: #151719;
  box-shadow: 0 18px 48px rgba(18, 22, 28, 0.1);
  object-fit: cover;
}

.process-carousel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(22, 22, 22, 0.1);
  border-radius: 0;
  background: #151719;
  box-shadow: 0 18px 48px rgba(18, 22, 28, 0.1);
}

.carousel-frame {
  position: relative;
  aspect-ratio: 16 / 9;
}

.carousel-frame img,
.carousel-frame video {
  position: absolute;
  inset: 0;
  height: 100%;
  border: 0;
  box-shadow: none;
  object-fit: contain;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease;
}

.carousel-frame img.is-active,
.carousel-frame video.is-active {
  opacity: 1;
  pointer-events: auto;
}

.carousel-button {
  position: absolute;
  top: 50%;
  z-index: 2;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 0;
  color: #fff;
  background: rgba(10, 10, 10, 0.58);
  cursor: pointer;
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1;
  transform: translateY(-50%);
  transition: background 160ms ease, border-color 160ms ease;
}

.carousel-button:hover,
.carousel-button:focus-visible {
  border-color: #fff;
  background: rgba(10, 10, 10, 0.82);
}

.carousel-button:focus-visible {
  outline: 3px solid rgba(66, 103, 214, 0.72);
  outline-offset: 3px;
}

.carousel-button.previous {
  left: 14px;
}

.carousel-button.next {
  right: 14px;
}

.media-strip {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 18px;
  width: min(1380px, calc(100% - 32px));
  margin-inline: auto;
  padding: 20px 0 clamp(72px, 9vw, 118px);
}

.media-feature {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border-radius: var(--radius);
  background: #1a1b1d;
  box-shadow: var(--shadow);
}

.media-feature.tall {
  min-height: 650px;
}

.actual-photo {
  background: #161616;
}

.actual-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.01);
}

.image-placeholder,
.video-placeholder {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(22, 22, 22, 0.1);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.22), transparent 34%),
    linear-gradient(315deg, rgba(216, 66, 47, 0.22), transparent 38%),
    #e9ece7;
}

.image-placeholder::before,
.video-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(22, 22, 22, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 22, 22, 0.07) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 78%);
  pointer-events: none;
}

.media-caption {
  position: absolute;
  inset: auto 18px 18px;
  max-width: 560px;
  padding: 18px;
  border-radius: var(--radius);
  color: #fff;
  background: rgba(10, 10, 10, 0.58);
  backdrop-filter: blur(16px);
}

.media-caption p {
  color: #98f1df;
}

.media-caption h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2.2vw, 2.4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.placeholder-art {
  position: absolute;
  inset: 0;
}

.keyboard-art {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 10px;
  align-items: end;
  padding: 10% 10% 18%;
  transform: perspective(900px) rotateX(54deg) rotateZ(-8deg) translateY(12%);
  transform-origin: center bottom;
}

.keyboard-art span {
  height: min(48vw, 420px);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: inset 0 -32px 0 rgba(22, 22, 22, 0.08), 0 28px 60px rgba(22, 22, 22, 0.25);
}

.circuit-art {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding: 18% 12%;
}

.circuit-art i {
  min-height: 110px;
  border: 2px solid rgba(22, 22, 22, 0.22);
  border-radius: 8px;
  background:
    radial-gradient(circle at 28% 28%, var(--yellow) 0 8px, transparent 9px),
    radial-gradient(circle at 70% 62%, var(--blue) 0 7px, transparent 8px),
    linear-gradient(90deg, transparent 48%, rgba(22, 22, 22, 0.18) 49% 51%, transparent 52%);
}

.sticky-copy {
  align-self: start;
  position: sticky;
  top: 116px;
}

.parts-list {
  display: grid;
  gap: 14px;
}

.part-card {
  min-height: 174px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 18px 42px rgba(18, 22, 28, 0.06);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.part-card:hover {
  border-color: rgba(15, 118, 110, 0.45);
  box-shadow: 0 26px 70px rgba(18, 22, 28, 0.12);
  transform: translateY(-5px);
}

.part-number {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
  border-radius: 50%;
  color: #fff;
  background: var(--ink);
  font-size: 0.75rem;
  font-weight: 800;
}

.part-card h3,
.step-copy h3 {
  margin-bottom: 10px;
  font-size: clamp(1.25rem, 2vw, 1.8rem);
  line-height: 1.1;
}

.part-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.68;
}

.tutorial-section {
  width: min(1240px, calc(100% - 32px));
}

.section-heading {
  max-width: 760px;
  margin-bottom: clamp(28px, 5vw, 60px);
}

.timeline {
  display: grid;
  gap: clamp(48px, 8vw, 92px);
}

.tutorial-step {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: clamp(24px, 5vw, 68px);
  align-items: center;
}

.tutorial-step.reversed {
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
}

.tutorial-step.reversed .step-media {
  order: 2;
}

.step-media {
  min-height: clamp(340px, 46vw, 620px);
  box-shadow: var(--shadow);
}

.board-art {
  display: grid;
  place-items: center;
}

.board-art::before {
  content: "";
  width: min(58%, 430px);
  aspect-ratio: 1.45;
  border: 12px solid #2d9f86;
  border-radius: 8px;
  background:
    radial-gradient(circle, #f5f7f1 0 4px, transparent 5px) 28px 28px / 42px 42px,
    linear-gradient(90deg, rgba(255, 255, 255, 0.22), transparent),
    #0f766e;
  box-shadow: 0 34px 80px rgba(22, 22, 22, 0.22);
  transform: rotate(-7deg);
}

.board-art span {
  position: absolute;
  width: 32%;
  height: 3px;
  background: rgba(216, 66, 47, 0.62);
  transform-origin: left;
}

.board-art span:nth-child(1) {
  top: 34%;
  left: 14%;
  transform: rotate(18deg);
}

.board-art span:nth-child(2) {
  top: 47%;
  left: 18%;
  background: rgba(66, 103, 214, 0.7);
  transform: rotate(-12deg);
}

.board-art span:nth-child(3) {
  top: 58%;
  left: 16%;
  background: rgba(243, 189, 63, 0.72);
  transform: rotate(9deg);
}

.board-art span:nth-child(4) {
  top: 66%;
  left: 20%;
  background: rgba(15, 118, 110, 0.65);
  transform: rotate(-18deg);
}

.wire-art {
  display: grid;
  place-items: center;
}

.wire-art span {
  position: absolute;
  width: min(56%, 460px);
  height: 8px;
  border-radius: 999px;
  background: var(--signal);
  box-shadow: 0 14px 26px rgba(22, 22, 22, 0.14);
}

.wire-art span:nth-child(1) {
  transform: translateY(-96px) rotate(-8deg);
}

.wire-art span:nth-child(2) {
  background: var(--blue);
  transform: translateY(-42px) rotate(7deg);
}

.wire-art span:nth-child(3) {
  background: var(--yellow);
  transform: translateY(14px) rotate(-4deg);
}

.wire-art span:nth-child(4) {
  background: var(--teal);
  transform: translateY(70px) rotate(9deg);
}

.wire-art span:nth-child(5) {
  width: min(34%, 260px);
  background: #202124;
  transform: translateY(128px) rotate(-12deg);
}

.final-art {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  align-items: end;
  gap: 8px;
  padding: 20% 12%;
}

.final-art span {
  height: 56%;
  min-height: 190px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: inset 0 -20px 0 rgba(22, 22, 22, 0.08);
}

.final-art span:nth-child(2),
.final-art span:nth-child(4),
.final-art span:nth-child(6) {
  height: 72%;
  background: #202124;
}

.step-copy {
  max-width: 430px;
}

.step-label {
  color: var(--signal);
}

.video-placeholder {
  display: grid;
  place-items: center;
  min-height: 420px;
  color: #fff;
  background:
    linear-gradient(145deg, rgba(22, 22, 22, 0.78), rgba(22, 22, 22, 0.2)),
    radial-gradient(circle at 76% 22%, rgba(216, 66, 47, 0.4), transparent 31%),
    radial-gradient(circle at 20% 70%, rgba(15, 118, 110, 0.44), transparent 28%),
    #242629;
}

.video-placeholder p {
  position: relative;
  z-index: 1;
  margin: 92px 18px 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.82rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.play-ring {
  position: absolute;
  width: 82px;
  height: 82px;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  transition: transform 220ms ease, background 220ms ease;
}

.play-ring::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 52%;
  width: 0;
  height: 0;
  border-block: 13px solid transparent;
  border-left: 20px solid #fff;
  transform: translate(-38%, -50%);
}

.video-placeholder:hover .play-ring {
  background: rgba(255, 255, 255, 0.22);
  transform: scale(1.08);
}

.code-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 36px);
  align-items: start;
}

.code-section .section-copy {
  max-width: 100%;
}

.code-section .section-copy h2 {
  margin-bottom: 0;
}

.code-window {
  max-height: 720px;
  width: 100%;
  overflow: hidden;
  border: 1px solid rgba(22, 22, 22, 0.1);
  border-radius: 0;
  background: #151719;
  box-shadow: var(--shadow);
}

.window-bar {
  display: flex;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.window-bar span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #ff5f57;
}

.window-bar span:nth-child(2) {
  background: #ffbd2e;
}

.window-bar span:nth-child(3) {
  background: #28c840;
}

pre {
  margin: 0;
  padding: clamp(18px, 3vw, 30px);
  max-height: 654px;
  overflow: auto;
}

code {
  color: #e6edf1;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(0.78rem, 1.5vw, 0.94rem);
  line-height: 1.72;
}

.demo-band {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: clamp(22px, 4vw, 48px);
  align-items: center;
  width: min(1380px, calc(100% - 32px));
  margin: 0 auto clamp(72px, 9vw, 120px);
  padding: clamp(18px, 2vw, 28px);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.demo-video {
  min-height: clamp(360px, 52vw, 720px);
}

.play-ring.large {
  width: 104px;
  height: 104px;
}

.demo-copy {
  padding: clamp(10px, 2vw, 20px);
}

.site-footer {
  display: flex;
  width: min(1160px, calc(100% - 32px));
  min-height: 86px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-inline: auto;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
  font-weight: 760;
}

.site-footer a {
  font-weight: 760;
  transition: color 160ms ease;
}

.site-footer a:hover {
  color: var(--ink);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 32px 20px 44px;
  }

  .intro-grid,
  .build-layout,
  .code-section,
  .media-strip,
  .tutorial-step,
  .tutorial-step.reversed,
  .demo-band {
    grid-template-columns: 1fr;
  }

  .piano-console {
    grid-column: auto;
  }

  .tutorial-step.reversed .step-media {
    order: 0;
  }

  .sticky-copy {
    position: static;
  }

  .media-feature,
  .media-feature.tall {
    min-height: 440px;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 28px;
  }

  h1 {
    font-size: clamp(3rem, 18vw, 5.7rem);
  }

  .stats-panel {
    grid-template-columns: 1fr;
  }

  .stats-panel div {
    min-height: 128px;
  }

  .media-caption {
    inset: auto 10px 10px;
    padding: 14px;
  }

  .section {
    width: min(100% - 24px, 1160px);
  }

  .media-strip,
  .process-section,
  .piano-section-inner,
  .tutorial-section,
  .demo-band {
    width: min(100% - 24px, 1240px);
  }

  .piano-toolbar {
    display: grid;
    align-items: start;
  }

  .piano-readout {
    justify-items: start;
  }

  .piano-viewport {
    border-radius: 6px;
  }

  .piano-key-layer {
    left: 7.6%;
    right: 1%;
    bottom: 6.8%;
    height: 33%;
  }

  .piano-key-button span {
    padding: 3px 5px;
  }

  .step-media,
  .video-placeholder,
  .demo-video {
    min-height: 330px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }
}