:root {
  color-scheme: dark;
  --ink: #060a14;
  --navy: #0a1020;
  --panel: #0d1526;
  --blue-gray: #8390a8;
  --off-white: #edf0ea;
  --cobalt: #4269c8;
  --gold: #b59a64;
  font-family: Inter, "Helvetica Neue", "Noto Sans JP", Arial, sans-serif;
  font-synthesis: none;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--off-white);
}

button,
select,
input,
a {
  color: inherit;
  font: inherit;
}

button,
select {
  border: 0;
}

button,
select,
input[type="range"] {
  cursor: pointer;
}

button:disabled,
select:disabled,
input:disabled {
  cursor: default;
  opacity: 0.42;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.58rem 0.78rem;
  background: var(--off-white);
  color: var(--ink);
  font-size: 0.72rem;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 180ms ease;
}

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

.music-header {
  position: relative;
  z-index: 1;
  display: flex;
  width: min(100%, 112rem);
  min-height: clamp(5.5rem, 6vw, 6rem);
  margin-inline: auto;
  align-items: center;
  justify-content: space-between;
  padding-inline: clamp(1.35rem, 4.4vw, 4.75rem);
}

.music-brand {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  color: rgba(237, 240, 234, 0.9);
  font-size: clamp(0.68rem, 0.92vw, 0.94rem);
  font-weight: 400;
  letter-spacing: 0.36em;
  line-height: 1;
  text-decoration: none;
}

.music-brand::after {
  width: clamp(1.75rem, 3vw, 3rem);
  height: 1px;
  background: rgba(181, 154, 100, 0.72);
  content: "";
  transition: background-color 220ms ease;
}

.music-brand:is(:hover, :focus-visible)::after {
  background: rgba(66, 105, 200, 0.78);
}

.music-header__meta {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 4rem);
  color: rgba(131, 144, 168, 0.78);
  font-size: 0.58rem;
  letter-spacing: 0.19em;
  line-height: 1;
}

.music-header__meta > span > span {
  color: rgba(66, 105, 200, 0.88);
}

.music-header__meta a {
  color: rgba(237, 240, 234, 0.84);
  text-decoration: none;
}

.music-brand:focus-visible,
.music-header__meta a:focus-visible,
.visualizer-switch button:focus-visible,
.player-controls button:focus-visible,
.track-select select:focus-visible,
.timeline input:focus-visible,
.volume-control input:focus-visible {
  outline: 1px solid rgba(237, 240, 234, 0.88);
  outline-offset: 0.42rem;
}

.music-lead {
  display: grid;
  width: min(100%, 112rem);
  min-height: clamp(7.25rem, 8vw, 8rem);
  margin-inline: auto;
  align-content: center;
  padding: clamp(1.25rem, 1.8vw, 1.75rem) clamp(1.35rem, 8.5vw, 9.5rem);
}

.music-lead__number {
  margin: 0 0 0.75rem;
  color: var(--cobalt);
  font-size: 0.54rem;
  letter-spacing: 0.28em;
}

.music-lead h1 {
  margin: 0;
  color: rgba(237, 240, 234, 0.9);
  font-size: clamp(0.92rem, 1.35vw, 1.3rem);
  font-weight: 400;
  letter-spacing: 0.34em;
  line-height: 1;
}

.music-lead__mode {
  margin: 1.15rem 0 0;
  color: rgba(131, 144, 168, 0.62);
  font-size: 0.5rem;
  letter-spacing: 0.22em;
  line-height: 1.4;
}

.music-stage {
  width: min(100%, 112rem);
  margin-inline: auto;
  padding: clamp(1.25rem, 2.5vw, 2.5rem) clamp(1.35rem, 7vw, 8rem) clamp(6rem, 10vw, 10rem);
}

.music-tablet {
  position: relative;
  width: min(100%, 88rem);
  margin-inline: auto;
  padding: clamp(0.75rem, 1.2vw, 1.15rem);
  border: 1px solid rgba(131, 144, 168, 0.34);
  border-radius: clamp(1rem, 1.7vw, 1.65rem);
  background: rgba(5, 10, 19, 0.86);
  box-shadow: 0 1.5rem 5rem rgba(0, 0, 0, 0.2);
}

.music-tablet::before {
  position: absolute;
  z-index: 2;
  inset: 0.38rem;
  border: 1px solid rgba(237, 240, 234, 0.04);
  border-radius: calc(clamp(1rem, 1.7vw, 1.65rem) - 0.3rem);
  content: "";
  pointer-events: none;
}

.music-tablet__camera {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 0.34rem;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(131, 144, 168, 0.52);
  box-shadow: 0 0 0 3px rgba(131, 144, 168, 0.08);
  transform: translateY(-50%);
}

.music-tablet__screen {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(131, 144, 168, 0.22);
  border-radius: clamp(0.55rem, 1vw, 0.9rem);
  background:
    linear-gradient(rgba(66, 105, 200, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(66, 105, 200, 0.025) 1px, transparent 1px),
    rgba(6, 12, 23, 0.94);
  background-size: 2rem 2rem;
}

.player-status,
.player-footer {
  display: flex;
  min-height: 2.6rem;
  align-items: center;
  justify-content: space-between;
  padding-inline: clamp(0.9rem, 2vw, 1.75rem);
  color: rgba(131, 144, 168, 0.66);
  font-size: 0.46rem;
  letter-spacing: 0.2em;
  line-height: 1;
}

.player-status {
  border-bottom: 1px solid rgba(131, 144, 168, 0.15);
}

.player-status span:last-child {
  color: rgba(66, 105, 200, 0.88);
}

.player-footer {
  min-height: 2.4rem;
  border-top: 1px solid rgba(131, 144, 168, 0.15);
}

.player-layout {
  display: grid;
  min-height: clamp(28rem, 36vw, 36rem);
  grid-template-columns: minmax(0, 1.08fr) minmax(18rem, 0.92fr);
}

.media-display {
  display: grid;
  min-width: 0;
  place-items: center;
  padding: clamp(1.25rem, 3vw, 3.5rem);
  border-right: 1px solid rgba(131, 144, 168, 0.15);
}

.media-display__viewport {
  --media-ratio: 1 / 1;
  position: relative;
  display: grid;
  width: min(100%, 29rem);
  max-height: 29rem;
  aspect-ratio: var(--media-ratio);
  overflow: hidden;
  place-items: center;
  border: 1px solid rgba(131, 144, 168, 0.3);
  background: #070d19;
  transition: width 220ms ease, aspect-ratio 220ms ease;
}

.media-display__viewport.is-landscape {
  --media-ratio: 16 / 9;
  width: min(100%, 39rem);
}

.media-display__viewport.is-portrait {
  --media-ratio: 9 / 16;
  width: min(48%, 18rem);
}

.media-display__artwork,
.media-display__video,
.media-placeholder {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

[hidden] {
  display: none !important;
}

.media-display__artwork,
.media-display__video {
  display: block;
  background: #040811;
  object-fit: contain;
}

.media-placeholder {
  display: grid;
  overflow: hidden;
  align-content: center;
  justify-items: center;
  background:
    linear-gradient(135deg, transparent 49.8%, rgba(131, 144, 168, 0.12) 50%, transparent 50.2%),
    radial-gradient(circle at 72% 27%, rgba(66, 105, 200, 0.14), transparent 34%),
    #080f1d;
  color: rgba(131, 144, 168, 0.62);
  pointer-events: none;
}

.media-placeholder::before,
.media-placeholder::after {
  position: absolute;
  border: 1px solid rgba(131, 144, 168, 0.14);
  content: "";
}

.media-placeholder::before {
  width: 44%;
  aspect-ratio: 1;
  transform: rotate(45deg);
}

.media-placeholder::after {
  width: 68%;
  height: 1px;
  border-width: 1px 0 0;
}

.media-placeholder__index {
  position: absolute;
  top: 1rem;
  left: 1rem;
  font-size: 0.42rem;
  letter-spacing: 0.2em;
}

.media-placeholder__mark {
  position: relative;
  z-index: 1;
  width: 5px;
  height: 5px;
  margin-bottom: 1.2rem;
  border-radius: 50%;
  background: var(--cobalt);
  box-shadow: 0 0 0 5px rgba(66, 105, 200, 0.08);
}

.media-placeholder strong {
  position: relative;
  z-index: 1;
  color: rgba(237, 240, 234, 0.78);
  font-size: clamp(0.78rem, 1.15vw, 1.05rem);
  font-weight: 400;
  letter-spacing: 0.28em;
}

.media-placeholder > span:last-child {
  position: relative;
  z-index: 1;
  margin-top: 0.75rem;
  font-size: 0.42rem;
  letter-spacing: 0.2em;
}

.spectrum-panel {
  min-height: clamp(8rem, 11vw, 10rem);
  padding: 0 clamp(1.25rem, 3vw, 3.5rem) 1.25rem;
}

.spectrum {
  display: block;
  width: 100%;
  height: clamp(6rem, 8.5vw, 8rem);
  opacity: 0.72;
  pointer-events: none;
}

.visualizer-switch {
  display: flex;
  min-height: 2rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: rgba(237, 240, 234, 0.5);
  font-size: 0.4rem;
  letter-spacing: 0.16em;
}

.visualizer-switch button {
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  background: transparent;
  color: inherit;
  font-size: inherit;
  letter-spacing: inherit;
  transition: color 180ms ease;
}

.visualizer-switch button:is(:hover, :focus-visible) {
  color: var(--off-white);
}

.player-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 4vw, 4.75rem);
}

.track-index,
.track-eyebrow,
.track-artist,
.media-notice {
  margin: 0;
}

.track-index {
  color: rgba(66, 105, 200, 0.92);
  font-size: 0.5rem;
  letter-spacing: 0.22em;
}

.track-eyebrow {
  margin-top: clamp(2rem, 4vw, 4rem);
  color: rgba(131, 144, 168, 0.55);
  font-size: 0.45rem;
  letter-spacing: 0.22em;
}

.player-copy h2 {
  max-width: 28rem;
  margin: 0.85rem 0 0;
  color: rgba(237, 240, 234, 0.92);
  font-size: clamp(1rem, 2vw, 1.65rem);
  font-weight: 400;
  letter-spacing: 0.12em;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.track-artist {
  margin-top: 0.8rem;
  color: rgba(131, 144, 168, 0.72);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  line-height: 1.5;
}

.track-select {
  display: grid;
  margin-top: clamp(2.5rem, 5vw, 5rem);
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 1.25rem;
}

.track-select label,
.volume-control label {
  color: rgba(131, 144, 168, 0.56);
  font-size: 0.45rem;
  letter-spacing: 0.2em;
}

.track-select select {
  width: 100%;
  min-height: 2.8rem;
  padding: 0 2.5rem 0 0.9rem;
  border: 1px solid rgba(131, 144, 168, 0.24);
  border-radius: 0;
  background: #080f1d;
  color: rgba(237, 240, 234, 0.78);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
}

.timeline {
  margin-top: 2rem;
}

.timeline input,
.volume-control input {
  width: 100%;
  height: 1px;
  margin: 0;
  appearance: none;
  background: rgba(131, 144, 168, 0.36);
  accent-color: var(--cobalt);
}

.timeline input::-webkit-slider-thumb,
.volume-control input::-webkit-slider-thumb {
  width: 9px;
  height: 9px;
  border: 1px solid rgba(237, 240, 234, 0.84);
  border-radius: 50%;
  appearance: none;
  background: #0a1020;
}

.timeline input::-moz-range-thumb,
.volume-control input::-moz-range-thumb {
  width: 8px;
  height: 8px;
  border: 1px solid rgba(237, 240, 234, 0.84);
  border-radius: 50%;
  background: #0a1020;
}

.timeline__time {
  display: flex;
  margin-top: 0.7rem;
  justify-content: space-between;
  color: rgba(131, 144, 168, 0.54);
  font-size: 0.42rem;
  letter-spacing: 0.14em;
}

.player-controls {
  display: grid;
  margin-top: 1.6rem;
  grid-template-columns: auto auto auto minmax(6.8rem, 1fr);
  align-items: center;
  gap: 0.55rem;
}

.player-controls button {
  min-width: 44px;
  min-height: 44px;
  padding: 0.75rem 0.8rem;
  border: 1px solid rgba(131, 144, 168, 0.22);
  background: rgba(10, 16, 32, 0.64);
  color: rgba(237, 240, 234, 0.72);
  font-size: 0.46rem;
  letter-spacing: 0.14em;
  transition: border-color 180ms ease, color 180ms ease, background-color 180ms ease;
}

.player-controls button:not(:disabled):is(:hover, :focus-visible) {
  border-color: rgba(66, 105, 200, 0.68);
  background: rgba(66, 105, 200, 0.08);
  color: var(--off-white);
}

.player-controls .player-controls__primary {
  min-width: 4.6rem;
  border-color: rgba(181, 154, 100, 0.48);
}

.player-controls .play-mode {
  justify-self: stretch;
}

.play-mode[aria-pressed="true"] {
  border-color: rgba(66, 105, 200, 0.64);
  color: rgba(237, 240, 234, 0.92);
}

.volume-control {
  display: grid;
  margin-top: 1.5rem;
  grid-template-columns: auto minmax(5rem, 1fr) 2rem;
  align-items: center;
  gap: 1rem;
}

.volume-control output {
  color: rgba(131, 144, 168, 0.62);
  font-size: 0.45rem;
  letter-spacing: 0.1em;
  text-align: right;
}

.media-notice {
  min-height: 1em;
  margin-top: 1.6rem;
  color: rgba(181, 154, 100, 0.7);
  font-size: 0.43rem;
  letter-spacing: 0.18em;
  line-height: 1.5;
}

.music-stage__count {
  width: min(100%, 88rem);
  margin: 0.9rem auto 0;
  color: rgba(131, 144, 168, 0.52);
  font-size: 0.46rem;
  letter-spacing: 0.2em;
  text-align: right;
}

@media (max-width: 940px) {
  .player-layout {
    grid-template-columns: 1fr;
  }

  .media-display {
    min-height: 26rem;
    border-right: 0;
    border-bottom: 1px solid rgba(131, 144, 168, 0.15);
  }

  .player-copy {
    padding-block: 3rem;
  }

  .track-eyebrow {
    margin-top: 2.5rem;
  }

  .track-select {
    margin-top: 3rem;
  }
}

@media (max-width: 760px) {
  .music-header {
    min-height: 6.5rem;
    align-items: flex-start;
    padding-top: max(1.5rem, env(safe-area-inset-top));
  }

  .music-brand {
    font-size: 0.66rem;
    letter-spacing: 0.31em;
  }

  .music-brand::after {
    width: 1.6rem;
  }

  .music-header__meta {
    flex-direction: column;
    align-items: flex-end;
    gap: 0.8rem;
    font-size: 0.48rem;
  }

  .music-lead {
    min-height: 8.25rem;
    padding-block: 1.25rem 1.75rem;
  }

  .music-stage {
    padding-top: 0.75rem;
    padding-inline: 0.75rem;
  }

  .music-tablet {
    padding: 0.5rem;
    border-radius: 0.9rem;
  }

  .music-tablet::before {
    inset: 0.22rem;
    border-radius: 0.7rem;
  }

  .music-tablet__camera {
    display: none;
  }

  .music-tablet__screen {
    border-radius: 0.46rem;
  }

  .player-status,
  .player-footer {
    font-size: 0.38rem;
  }

  .media-display {
    min-height: 21rem;
    padding: 1rem;
  }

  .media-display__viewport {
    width: min(100%, 21rem);
  }

  .media-display__viewport.is-portrait {
    width: min(58%, 12rem);
  }

  .spectrum-panel {
    min-height: 7.5rem;
    padding-inline: 1rem;
  }

  .spectrum {
    height: 5.5rem;
  }

  .player-copy {
    padding: 2.25rem 1.2rem 2.5rem;
  }

  .player-copy h2 {
    font-size: 1rem;
  }

  .track-select {
    margin-top: 2.5rem;
    grid-template-columns: 1fr;
    gap: 0.65rem;
  }

  .player-controls {
    grid-template-columns: repeat(3, 1fr);
  }

  .player-controls .play-mode {
    grid-column: 1 / -1;
  }

  .volume-control {
    grid-template-columns: auto minmax(4rem, 1fr) 1.6rem;
    gap: 0.7rem;
  }

  .music-stage__count {
    padding-right: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-delay: 0ms !important;
    transition-duration: 0.01ms !important;
  }
}