:root {
  --ink: #20191b;
  --ink-soft: #64575a;
  --paper: #fffaf8;
  --paper-cool: #f7f8fb;
  --pink: #ffd5dc;
  --pink-deep: #9c4d61;
  --blue: #3eb5d4;
  --blue-deep: #247eaa;
  --gold: #f7bb42;
  --line: rgba(32, 25, 27, 0.12);
  --radius: 32px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  z-index: 20;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.18;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.12'/%3E%3C/svg%3E");
}

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

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: white;
  transform: translateY(-150%);
}

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

.site-header {
  position: fixed;
  z-index: 50;
  top: 18px;
  left: 50%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 36px), 980px);
  padding: 10px 12px 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: 999px;
  background: rgba(255, 250, 248, 0.76);
  box-shadow: 0 16px 50px rgba(61, 43, 47, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transform: translateX(-50%);
}

.brand {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  font-weight: 760;
  letter-spacing: -0.02em;
}

.brand img {
  border-radius: 9px;
}

.site-header nav {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 14px;
  font-weight: 650;
}

.site-header nav a {
  padding: 9px 14px;
  border-radius: 999px;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
  background: rgba(156, 77, 97, 0.1);
}

.site-header .nav-download {
  background: var(--ink);
  color: white;
}

.site-header .nav-download:hover,
.site-header .nav-download:focus-visible {
  background: var(--pink-deep);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 0.86fr;
  gap: clamp(40px, 7vw, 110px);
  align-items: center;
  width: min(calc(100% - 48px), var(--max-width));
  min-height: 100svh;
  margin: auto;
  padding: 120px 0 90px;
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: 8%;
  left: -24%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255, 213, 220, 0.62);
  filter: blur(90px);
  content: "";
}

.eyebrow,
.chapter-number {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 0 0 24px;
  color: var(--pink-deep);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.eyebrow span {
  display: inline-block;
  width: 30px;
  height: 2px;
  background: currentColor;
}

.hero h1 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(58px, 7vw, 108px);
  font-weight: 880;
  letter-spacing: -0.085em;
  line-height: 0.94;
}

.music-mark {
  display: inline-block;
  margin-left: 0.1em;
  color: var(--pink-deep);
  font-size: 0.72em;
  transform: rotate(8deg);
  transform-origin: bottom left;
}

.hero-lead {
  max-width: 520px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 720;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-3px);
}

.button.primary {
  background: var(--ink);
  color: white;
  box-shadow: 0 14px 30px rgba(32, 25, 27, 0.18);
}

.button.secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.62);
}

.hero-notes {
  display: flex;
  gap: 11px 24px;
  flex-wrap: wrap;
  margin-top: 38px;
  color: var(--ink-soft);
  font-size: 13px;
}

.hero-notes span::before {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin: 0 9px 2px 0;
  border-radius: 50%;
  background: var(--blue);
  content: "";
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 650px;
}

.splash-card {
  position: relative;
  z-index: 2;
  width: min(76vw, 382px);
  overflow: hidden;
  border: 8px solid rgba(255, 255, 255, 0.88);
  border-radius: 46px;
  background: white;
  box-shadow: 0 45px 90px rgba(58, 51, 78, 0.2), 0 8px 24px rgba(58, 51, 78, 0.1);
  transform: rotate(2.5deg);
}

.splash-card img {
  width: 100%;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(62, 181, 212, 0.28);
  border-radius: 50%;
}

.orbit-one {
  width: 560px;
  height: 560px;
  animation: orbit 18s linear infinite;
}

.orbit-two {
  width: 440px;
  height: 440px;
  border-style: dashed;
  border-color: rgba(156, 77, 97, 0.2);
  animation: orbit 24s linear reverse infinite;
}

.orbit::before {
  position: absolute;
  top: 7%;
  left: 12%;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--pink-deep);
  content: "";
  box-shadow: 0 0 0 8px rgba(156, 77, 97, 0.1);
}

.orbit-two::before {
  top: auto;
  right: 8%;
  bottom: 18%;
  left: auto;
  background: var(--gold);
  box-shadow: 0 0 0 8px rgba(247, 187, 66, 0.12);
}

.floating-note {
  position: absolute;
  z-index: 3;
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 18px;
  font-size: 25px;
  font-weight: 800;
  box-shadow: 0 18px 38px rgba(32, 25, 27, 0.13);
  animation: float 4.5s ease-in-out infinite;
}

.note-one {
  top: 15%;
  left: 0;
  background: var(--gold);
  transform: rotate(-10deg);
}

.note-two {
  right: -3%;
  bottom: 24%;
  background: var(--blue);
  color: white;
  animation-delay: -2s;
  transform: rotate(9deg);
}

.playing-pill {
  position: absolute;
  z-index: 4;
  right: -5%;
  bottom: 12%;
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 18px 50px rgba(32, 25, 27, 0.14);
  backdrop-filter: blur(14px);
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
}

.playing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--pink-deep);
  box-shadow: 0 0 0 5px rgba(156, 77, 97, 0.12);
}

.mini-wave {
  display: flex;
  gap: 2px;
  align-items: center;
  height: 15px;
}

.mini-wave i,
.closing-wave i {
  display: block;
  width: 2px;
  border-radius: 999px;
  background: currentColor;
  animation: wave 900ms ease-in-out infinite alternate;
}

.mini-wave i:nth-child(1) { height: 5px; }
.mini-wave i:nth-child(2) { height: 13px; animation-delay: -300ms; }
.mini-wave i:nth-child(3) { height: 8px; animation-delay: -600ms; }
.mini-wave i:nth-child(4) { height: 11px; animation-delay: -150ms; }

.scroll-cue {
  position: absolute;
  bottom: 27px;
  left: 0;
  display: flex;
  gap: 14px;
  align-items: center;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.2em;
  writing-mode: vertical-rl;
}

.scroll-cue i {
  display: block;
  width: 1px;
  height: 55px;
  overflow: hidden;
  background: var(--line);
}

.scroll-cue i::after {
  display: block;
  width: 100%;
  height: 45%;
  background: var(--pink-deep);
  animation: scrollLine 2s ease-in-out infinite;
  content: "";
}

.manifesto {
  display: grid;
  min-height: 70vh;
  place-items: center;
  padding: 100px 24px;
  background: var(--ink);
  color: white;
  text-align: center;
}

.manifesto p {
  max-width: 1000px;
  margin: 0;
  font-size: clamp(38px, 6vw, 82px);
  font-weight: 820;
  letter-spacing: -0.065em;
  line-height: 1.22;
}

.manifesto span {
  color: var(--pink);
}

.feature-story {
  position: relative;
}

.chapter-line {
  position: absolute;
  z-index: 3;
  top: 0;
  left: 32px;
  width: 2px;
  height: 100%;
  background: rgba(32, 25, 27, 0.08);
}

.chapter-progress {
  position: sticky;
  top: 0;
  display: block;
  width: 2px;
  height: 28vh;
  background: linear-gradient(var(--blue), var(--pink-deep));
}

.feature {
  position: relative;
  display: grid;
  grid-template-columns: 0.86fr 1fr;
  gap: clamp(50px, 9vw, 150px);
  align-items: center;
  min-height: 110vh;
  padding: 150px max(48px, calc((100vw - var(--max-width)) / 2));
  overflow: hidden;
}

.feature:nth-of-type(even) {
  grid-template-columns: 1fr 0.86fr;
}

.feature:nth-of-type(even) .feature-copy {
  order: 2;
}

.feature-home { background: #fffaf8; }
.feature-library { background: #fff0f2; }
.feature-search { background: #eef9fc; }
.feature-playlist { background: #fff8e9; }
.feature-player { background: #171315; color: white; }

.feature-copy {
  position: relative;
  z-index: 2;
}

.chapter-number {
  margin-bottom: 24px;
}

.feature h2 {
  margin: 0;
  font-size: clamp(42px, 4.2vw, 64px);
  font-weight: 840;
  letter-spacing: -0.065em;
  line-height: 1.08;
}

.feature-copy > p:not(.chapter-number) {
  max-width: 520px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.9;
}

.feature-player .feature-copy > p:not(.chapter-number) {
  color: rgba(255, 255, 255, 0.62);
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.feature-tags li {
  padding: 8px 13px;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 12px;
  opacity: 0.78;
}

.feature-player .feature-tags li {
  color: white;
  opacity: 0.6;
}

.phone-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 760px;
  perspective: 1200px;
}

.phone {
  position: relative;
  z-index: 2;
  width: min(100%, 430px);
  margin: 0;
  overflow: hidden;
  border: 9px solid #151214;
  border-radius: 52px;
  box-shadow: 0 55px 90px rgba(32, 25, 27, 0.2), 0 15px 28px rgba(32, 25, 27, 0.13);
  transform: rotateY(-4deg) rotateX(1deg);
  transition: transform 500ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.feature:nth-of-type(even) .phone {
  transform: rotateY(4deg) rotateX(1deg);
}

.phone:hover {
  transform: rotateY(0) rotateX(0) translateY(-8px) !important;
}

.phone img {
  width: 100%;
  background: white;
}

.phone-shadow {
  position: absolute;
  width: 74%;
  height: 32%;
  border-radius: 50%;
  background: var(--pink);
  filter: blur(55px);
  transform: translate(20%, 100%);
}

.library-card-back {
  position: absolute;
  width: 390px;
  height: 560px;
  border: 2px solid rgba(156, 77, 97, 0.22);
  border-radius: 48px;
  transform: rotate(-9deg) translate(-36px, 20px);
}

.search-loop {
  position: absolute;
  width: 520px;
  height: 520px;
  border: 2px dashed rgba(36, 126, 170, 0.26);
  border-radius: 50%;
  animation: orbit 30s linear infinite;
}

.search-loop::after {
  position: absolute;
  right: 9%;
  bottom: 2%;
  width: 90px;
  height: 2px;
  border-radius: 4px;
  background: rgba(36, 126, 170, 0.26);
  content: "";
  transform: rotate(45deg);
  transform-origin: left center;
}

.playlist-wash {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 47% 53% 61% 39% / 44% 36% 64% 56%;
  background: rgba(247, 187, 66, 0.25);
  filter: blur(6px);
  animation: morph 12s ease-in-out infinite alternate;
}

.player-glow {
  position: absolute;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 213, 220, 0.24), rgba(247, 187, 66, 0.11) 35%, transparent 68%);
  filter: blur(12px);
}

.phone-dark {
  border-color: #30292c;
  box-shadow: 0 55px 100px rgba(0, 0, 0, 0.48), 0 0 80px rgba(247, 187, 66, 0.08);
}

.annotation {
  position: absolute;
  z-index: 4;
  max-width: 190px;
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 16px 35px rgba(32, 25, 27, 0.1);
  backdrop-filter: blur(12px);
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.5;
}

.annotation::before {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin: 0 8px 1px 0;
  border-radius: 50%;
  background: var(--pink-deep);
  content: "";
}

.annotation-right { right: -10px; bottom: 16%; }
.annotation-left { left: -16px; top: 19%; }
.annotation-dark {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.74);
}

.closing {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 0.7fr;
  gap: 80px;
  align-items: center;
  min-height: 88vh;
  padding: 120px max(48px, calc((100vw - var(--max-width)) / 2));
  overflow: hidden;
  background: var(--blue);
}

.closing-copy {
  position: relative;
  z-index: 2;
}

.closing .eyebrow { color: #0c4c66; }

.closing h2 {
  margin: 0;
  font-size: clamp(48px, 6vw, 88px);
  font-weight: 860;
  letter-spacing: -0.07em;
  line-height: 1.03;
}

.closing-copy > p:not(.eyebrow, .availability) {
  max-width: 580px;
  margin: 28px 0 0;
  color: rgba(15, 43, 55, 0.74);
  font-size: 17px;
  line-height: 1.8;
}

.download-badges {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.download-badge {
  display: block;
  width: min(240px, calc(50% - 7px));
  border-radius: 12px;
  box-shadow: 0 16px 35px rgba(0, 44, 63, 0.16);
  transition: transform 180ms ease, opacity 180ms ease;
}

.download-badge img {
  width: 100%;
  border-radius: 12px;
}

.download-badge.is-disabled {
  cursor: not-allowed;
  opacity: 0.64;
  filter: saturate(0.65);
}

.download-badge.is-disabled:hover {
  transform: translateY(-2px);
}

.availability {
  display: flex;
  gap: 9px;
  align-items: center;
  margin: 18px 0 0;
  color: rgba(15, 43, 55, 0.68);
  font-size: 12px;
  font-weight: 650;
}

.availability span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(247, 187, 66, 0.24);
}

.closing-art {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  min-height: 450px;
}

.closing-art > img {
  width: min(68%, 280px);
  border-radius: 25%;
  filter: drop-shadow(0 36px 42px rgba(12, 76, 102, 0.3));
  transform: rotate(5deg);
}

.closing-orbit {
  position: absolute;
  right: -15%;
  width: 65vw;
  height: 65vw;
  border: 2px solid rgba(255, 255, 255, 0.24);
  border-radius: 50%;
  box-shadow: inset 0 0 0 80px rgba(255, 255, 255, 0.04), inset 0 0 0 160px rgba(255, 255, 255, 0.04);
}

.closing-wave {
  display: flex;
  gap: 8px;
  align-items: center;
  height: 62px;
  margin-top: 34px;
  color: #0c4c66;
}

.closing-wave i { width: 5px; }
.closing-wave i:nth-child(1) { height: 18px; }
.closing-wave i:nth-child(2) { height: 38px; animation-delay: -120ms; }
.closing-wave i:nth-child(3) { height: 55px; animation-delay: -260ms; }
.closing-wave i:nth-child(4) { height: 30px; animation-delay: -430ms; }
.closing-wave i:nth-child(5) { height: 48px; animation-delay: -90ms; }
.closing-wave i:nth-child(6) { height: 25px; animation-delay: -310ms; }
.closing-wave i:nth-child(7) { height: 13px; animation-delay: -510ms; }

footer {
  display: flex;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
  min-height: 120px;
  padding: 30px max(28px, calc((100vw - var(--max-width)) / 2));
  background: var(--ink);
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

footer .brand { color: white; }

.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 760ms ease, transform 760ms cubic-bezier(0.18, 0.8, 0.25, 1);
}

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

@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes float { 50% { translate: 0 -14px; } }
@keyframes wave { to { transform: scaleY(0.42); opacity: 0.65; } }
@keyframes scrollLine { from { transform: translateY(-110%); } to { transform: translateY(240%); } }
@keyframes morph { to { border-radius: 61% 39% 42% 58% / 37% 60% 40% 63%; transform: rotate(8deg) scale(1.05); } }

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 150px;
    text-align: center;
  }

  .hero-copy { display: grid; justify-items: center; }
  .hero-visual { min-height: 590px; }
  .scroll-cue { display: none; }
  .feature,
  .feature:nth-of-type(even),
  .closing {
    grid-template-columns: 1fr;
  }

  .feature,
  .feature:nth-of-type(even) {
    gap: 70px;
    min-height: auto;
    padding-top: 110px;
    padding-bottom: 110px;
  }

  .feature:nth-of-type(even) .feature-copy { order: 0; }
  .feature-copy { text-align: center; }
  .chapter-number, .feature-tags { justify-content: center; }
  .feature-copy > p:not(.chapter-number) { margin-right: auto; margin-left: auto; }
  .phone-stage { min-height: 700px; }
  .chapter-line { left: 16px; }
  .closing { gap: 20px; text-align: center; }
  .closing-copy { display: grid; justify-items: center; }
  .closing-art { min-height: 340px; }
  .closing-orbit { right: -35%; width: 100vw; height: 100vw; }
}

@media (max-width: 560px) {
  .site-header { top: 10px; width: calc(100% - 20px); }
  .site-header nav > a:first-child { display: none; }
  .hero { width: calc(100% - 36px); padding-top: 130px; }
  .hero h1 { font-size: clamp(54px, 17vw, 78px); }
  .hero-lead { font-size: 17px; }
  .hero-actions { flex-direction: column; width: 100%; }
  .button { width: 100%; }
  .hero-visual { min-height: 530px; }
  .splash-card { width: min(77vw, 340px); border-width: 6px; border-radius: 38px; }
  .orbit-one { width: 125vw; height: 125vw; }
  .orbit-two { width: 98vw; height: 98vw; }
  .note-one { left: -4px; }
  .note-two { right: -5px; }
  .playing-pill { right: 0; bottom: 7%; }
  .manifesto { min-height: 62vh; }
  .manifesto p { font-size: 39px; }
  .feature,
  .feature:nth-of-type(even) {
    padding: 90px 22px;
  }
  .feature h2 { font-size: 45px; }
  .feature-copy > p:not(.chapter-number) { font-size: 15px; }
  .phone-stage { min-height: auto; padding: 24px 8px 50px; }
  .phone { width: min(100%, 370px); border-width: 7px; border-radius: 44px; }
  .annotation { max-width: 170px; }
  .annotation-left { left: 0; top: 16%; }
  .annotation-right { right: 0; bottom: 7%; }
  .library-card-back { width: 83vw; height: 112vw; }
  .search-loop, .playlist-wash, .player-glow { width: 110vw; height: 110vw; }
  .closing { padding: 100px 22px 80px; }
  .closing h2 { font-size: 48px; }
  .download-badges { flex-direction: column; width: 100%; align-items: center; }
  .download-badge { width: min(100%, 260px); }
  footer { flex-direction: column; gap: 12px; padding: 36px 24px; text-align: center; }
  footer p { margin: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}