.sound-layer[hidden] {
  display: none;
}

.sound-layer {
  --sound-accent: #8ce9cf;
  position: fixed;
  inset: 0;
  z-index: 2147483100;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  padding: clamp(20px, 3.5vw, 52px);
  overflow: hidden;
  color: #edf9f5;
  background: #07110f;
  opacity: 0;
  transform: scale(1.012);
  transition: opacity 240ms ease, transform 320ms cubic-bezier(0.2, 0.75, 0.2, 1);
}

.sound-layer.is-open {
  opacity: 1;
  transform: scale(1);
}

.sound-layer-background {
  position: absolute;
  inset: 0;
  z-index: -3;
  background:
    linear-gradient(90deg, rgba(2, 10, 14, 0.9) 0%, rgba(2, 12, 15, 0.74) 42%, rgba(3, 16, 20, 0.54) 70%, rgba(2, 12, 17, 0.48) 100%),
    linear-gradient(180deg, rgba(2, 10, 14, 0.08), rgba(1, 8, 12, 0.42)),
    url("./assets/visuals-07/sound-archive-bg-v1.webp") center / cover no-repeat;
  filter: saturate(0.78) contrast(1.06) brightness(0.9);
}

.sound-layer::before {
  content: "";
  position: absolute;
  inset: -20%;
  z-index: -2;
  background:
    radial-gradient(circle at 68% 48%, rgba(89, 226, 196, 0.16), transparent 28%),
    radial-gradient(circle at 25% 78%, rgba(92, 144, 211, 0.12), transparent 25%);
  animation: sound-ambient 12s ease-in-out infinite alternate;
}

.sound-layer-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.08;
  background-image:
    linear-gradient(rgba(140, 233, 207, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 233, 207, 0.18) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to right, black, transparent 72%);
}

@keyframes sound-ambient {
  to { transform: translate3d(-2%, 1.5%, 0) scale(1.04); }
}

.sound-header,
.sound-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
  z-index: 2;
}

.sound-header {
  padding-bottom: clamp(18px, 3vh, 34px);
  border-bottom: 1px solid rgba(140, 233, 207, 0.22);
}

.sound-header p,
.sound-footer,
.sound-track-heading,
.sound-now-playing > p,
.sound-progress-group label,
.sound-volume > span {
  font-family: Consolas, "Yu Gothic UI", monospace;
  letter-spacing: 0.14em;
}

.sound-header p {
  margin: 0 0 8px;
  color: rgba(214, 236, 229, 0.57);
  font-size: 10px;
}

.sound-header p span {
  color: var(--sound-accent);
}

.sound-header h2 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(25px, 3.5vw, 48px);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.sound-close {
  width: 48px;
  height: 48px;
  flex: 0 0 auto;
  border: 1px solid rgba(140, 233, 207, 0.36);
  border-radius: 50%;
  color: #eafff8;
  background: rgba(7, 24, 22, 0.72);
  font-size: 25px;
  cursor: pointer;
}

.sound-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(430px, 1.28fr);
  align-items: start;
  gap: clamp(32px, 6vw, 100px);
  min-height: 0;
  padding: clamp(28px, 5vh, 70px) 0;
}

.sound-track-panel {
  align-self: start;
}

.sound-track-heading {
  display: flex;
  justify-content: space-between;
  margin-bottom: 13px;
  color: rgba(220, 240, 233, 0.5);
  font-size: 10px;
}

.sound-track {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) 10px;
  gap: 14px;
  align-items: center;
  width: 100%;
  padding: 19px 15px;
  color: rgba(225, 239, 234, 0.64);
  text-align: left;
  border: 0;
  border-top: 1px solid rgba(140, 233, 207, 0.15);
  background: transparent;
  cursor: pointer;
  transition: color 180ms ease, background 180ms ease, padding 180ms ease;
}

.sound-track:last-of-type {
  border-bottom: 1px solid rgba(140, 233, 207, 0.15);
}

.sound-track:hover,
.sound-track:focus-visible,
.sound-track[aria-current="true"] {
  padding-left: 21px;
  color: #f3fffb;
  background: linear-gradient(90deg, rgba(140, 233, 207, 0.12), transparent);
  outline: none;
}

.sound-track > span {
  color: var(--sound-accent);
  font-family: Consolas, monospace;
  font-size: 12px;
}

.sound-track strong,
.sound-track small {
  display: block;
}

.sound-track strong {
  margin-bottom: 5px;
  font-family: "Yu Gothic UI", sans-serif;
  font-size: clamp(13px, 1.25vw, 17px);
  letter-spacing: 0.015em;
}

.sound-track small {
  color: rgba(191, 215, 207, 0.48);
  font: 9px/1.4 Consolas, monospace;
  letter-spacing: 0.11em;
}

.sound-track i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(140, 233, 207, 0.18);
}

.sound-track[aria-current="true"] i {
  background: var(--sound-accent);
  box-shadow: 0 0 14px var(--sound-accent);
}

.sound-track-note {
  margin: 20px 8px 0;
  color: rgba(213, 231, 225, 0.53);
  font-size: 12px;
  line-height: 1.9;
}

.sound-player {
  display: grid;
  grid-template-columns: minmax(180px, 0.7fr) minmax(260px, 1fr);
  grid-template-areas:
    "disc info"
    "disc transport"
    "disc volume";
  column-gap: clamp(30px, 5vw, 78px);
  align-self: start;
  align-content: start;
}

.sound-planetarium {
  grid-area: disc;
  position: relative;
  place-self: center;
  width: min(31vw, 400px);
  aspect-ratio: 1;
  isolation: isolate;
  background:
    radial-gradient(circle at 15% 28%, rgba(183, 255, 232, 0.55) 0 1px, transparent 1.7px),
    radial-gradient(circle at 82% 17%, rgba(240, 222, 159, 0.44) 0 1px, transparent 1.8px),
    radial-gradient(circle at 87% 73%, rgba(168, 246, 223, 0.38) 0 1px, transparent 1.8px),
    radial-gradient(circle at 12% 78%, rgba(168, 246, 223, 0.25) 0 1px, transparent 1.8px),
    radial-gradient(circle, rgba(76, 206, 177, 0.09), transparent 62%);
  filter: drop-shadow(0 20px 55px rgba(0, 18, 20, 0.48));
}

.sound-planetarium::before {
  content: "";
  position: absolute;
  inset: 7%;
  border-radius: 50%;
  background: repeating-conic-gradient(
    from -6deg,
    rgba(166, 240, 219, 0.38) 0 0.35deg,
    transparent 0.35deg 12deg
  );
  opacity: 0.22;
  -webkit-mask: radial-gradient(circle, transparent 0 91%, #000 91.2% 92%, transparent 92.2%);
  mask: radial-gradient(circle, transparent 0 91%, #000 91.2% 92%, transparent 92.2%);
}

.sound-orbit {
  --orbit-rotation: 0deg;
  --point-x: 78%;
  --point-y: 10%;
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--orbit-width);
  height: var(--orbit-height);
  border: 1px solid rgba(157, 237, 216, 0.24);
  border-radius: 50%;
  box-shadow: inset 0 0 18px rgba(115, 229, 202, 0.025);
  transform: translate(-50%, -50%) rotate(var(--orbit-rotation));
}

.sound-orbit::after {
  content: "";
  position: absolute;
  top: var(--point-y);
  left: var(--point-x);
  width: 5px;
  aspect-ratio: 1;
  border: 1px solid rgba(229, 255, 245, 0.75);
  border-radius: 50%;
  background: #9ef4d8;
  box-shadow: 0 0 5px #b8ffe9, 0 0 18px rgba(122, 236, 207, 0.75);
  transform: translate(-50%, -50%);
}

.sound-orbit--outer {
  --orbit-width: 98%;
  --orbit-height: 42%;
  --orbit-rotation: -17deg;
  --point-x: 88%;
  --point-y: 24%;
}

.sound-orbit--inner {
  --orbit-width: 74%;
  --orbit-height: 27%;
  --orbit-rotation: 24deg;
  --point-x: 18%;
  --point-y: 18%;
  border-color: rgba(221, 223, 171, 0.18);
}

.sound-orbit--inner::after {
  width: 4px;
  background: #f2dda1;
  box-shadow: 0 0 6px rgba(255, 235, 172, 0.9), 0 0 20px rgba(233, 207, 132, 0.48);
}

.sound-orbit--polar {
  --orbit-width: 31%;
  --orbit-height: 90%;
  --orbit-rotation: 14deg;
  --point-x: 38%;
  --point-y: 2%;
  border-color: rgba(151, 231, 213, 0.15);
}

.sound-observation-line {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: -1;
  width: 88%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(143, 235, 211, 0.16) 22%, rgba(143, 235, 211, 0.34) 50%, rgba(143, 235, 211, 0.13) 78%, transparent);
  transform: translate(-50%, -50%) rotate(-42deg);
}

.sound-planet {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  width: 47%;
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid rgba(192, 255, 235, 0.44);
  border-radius: 50%;
  background:
    radial-gradient(circle at 27% 23%, rgba(229, 255, 246, 0.82) 0 1.2%, transparent 2.2%),
    radial-gradient(circle at 30% 29%, rgba(157, 240, 215, 0.52), transparent 26%),
    linear-gradient(142deg, #59a993 0%, #245e55 25%, #0d3032 48%, #06171e 68%, #02080e 100%);
  box-shadow:
    inset -26px -24px 54px rgba(0, 5, 12, 0.82),
    inset 13px 11px 32px rgba(159, 244, 217, 0.1),
    0 0 0 6px rgba(126, 230, 201, 0.025),
    0 0 34px rgba(105, 224, 194, 0.2),
    0 0 90px rgba(44, 171, 150, 0.13);
  transform: translate(-50%, -50%);
}

.sound-planet::after {
  content: "";
  position: absolute;
  inset: -4%;
  border: 1px solid transparent;
  border-top-color: rgba(213, 255, 243, 0.75);
  border-left-color: rgba(152, 244, 218, 0.44);
  border-radius: 50%;
  filter: blur(0.3px);
  transform: rotate(-26deg);
}

.sound-planet-light {
  position: absolute;
  top: -24%;
  left: -34%;
  width: 88%;
  height: 118%;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(181, 255, 232, 0.22), rgba(119, 226, 199, 0.04) 42%, transparent 68%);
  filter: blur(7px);
  transform: rotate(19deg);
}

.sound-planet-contours {
  position: absolute;
  inset: 7%;
  border-radius: 50%;
  background:
    radial-gradient(ellipse at 33% 41%, transparent 0 17%, rgba(159, 230, 210, 0.14) 17.5% 18%, transparent 18.5% 27%, rgba(159, 230, 210, 0.09) 27.5% 28%, transparent 28.5%),
    radial-gradient(ellipse at 68% 74%, transparent 0 12%, rgba(159, 230, 210, 0.08) 12.5% 13%, transparent 13.5%);
  opacity: 0.72;
  transform: rotate(-19deg) scale(1.2, 0.88);
}

.sound-planet-caption {
  position: absolute;
  bottom: 4%;
  left: 7%;
  display: grid;
  gap: 5px;
  padding-left: 12px;
  color: rgba(204, 243, 232, 0.62);
  font-family: Consolas, "Yu Gothic UI", monospace;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.sound-planet-caption::before {
  content: "";
  position: absolute;
  top: 1px;
  bottom: 1px;
  left: 0;
  width: 1px;
  background: linear-gradient(#b6f5e2, rgba(125, 223, 198, 0.08));
}

.sound-planet-caption b {
  color: rgba(204, 255, 239, 0.88);
  font-size: 9px;
  font-weight: 600;
}

.sound-planet-caption i {
  font-size: 7px;
  font-style: normal;
}

.sound-layer[data-playing="true"] .sound-planet {
  animation: sound-planet-breathe 4.6s ease-in-out infinite alternate;
}

.sound-layer[data-playing="true"] .sound-orbit::after {
  animation: sound-observation-pulse 2.7s ease-in-out infinite;
}

.sound-layer[data-playing="true"] .sound-orbit--inner::after { animation-delay: -1.2s; }
.sound-layer[data-playing="true"] .sound-orbit--polar::after { animation-delay: -2s; }

@keyframes sound-planet-breathe {
  to {
    box-shadow:
      inset -26px -24px 54px rgba(0, 5, 12, 0.76),
      inset 13px 11px 32px rgba(159, 244, 217, 0.16),
      0 0 0 7px rgba(126, 230, 201, 0.04),
      0 0 46px rgba(105, 224, 194, 0.3),
      0 0 110px rgba(44, 171, 150, 0.18);
  }
}

@keyframes sound-observation-pulse {
  50% {
    opacity: 0.52;
    transform: translate(-50%, -50%) scale(0.62);
  }
}

.sound-now-playing { grid-area: info; align-self: start; }

.sound-now-playing > p:first-child {
  margin: 0 0 13px;
  color: var(--sound-accent);
  font-size: 10px;
}

.sound-now-playing h3 {
  margin: 0;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(24px, 2.1vw, 42px);
  font-weight: 500;
  line-height: 1.2;
  white-space: nowrap;
}

.sound-now-playing > p:last-child {
  margin: 17px 0 0;
  color: rgba(218, 236, 230, 0.62);
  font-size: 13px;
  line-height: 1.8;
}

.sound-transport {
  grid-area: transport;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  margin-top: 30px;
}

.sound-play {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(140, 233, 207, 0.5);
  border-radius: 50%;
  color: #06110e;
  background: var(--sound-accent);
  cursor: pointer;
  box-shadow: 0 0 28px rgba(140, 233, 207, 0.16);
}

.sound-play-icon {
  width: 0;
  height: 0;
  margin-left: 4px;
  border-top: 7px solid transparent;
  border-bottom: 7px solid transparent;
  border-left: 11px solid currentColor;
}

.sound-play[aria-pressed="true"] .sound-play-icon {
  width: 11px;
  height: 14px;
  margin-left: 0;
  border: 0;
  border-right: 4px solid currentColor;
  border-left: 4px solid currentColor;
}

.sound-progress-group label {
  display: block;
  margin-bottom: 8px;
  color: rgba(211, 233, 225, 0.47);
  font-size: 9px;
}

.sound-progress-group input,
.sound-volume input {
  width: 100%;
  accent-color: var(--sound-accent);
}

.sound-time {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  color: rgba(211, 233, 225, 0.48);
  font: 9px/1 Consolas, monospace;
}

.sound-time span { color: var(--sound-accent); }

.sound-volume {
  grid-area: volume;
  display: grid;
  grid-template-columns: auto minmax(80px, 1fr) 42px;
  gap: 12px;
  align-items: center;
  margin-top: 24px;
  color: rgba(211, 233, 225, 0.5);
  font: 9px/1 Consolas, monospace;
}

.sound-footer {
  padding-top: 18px;
  border-top: 1px solid rgba(140, 233, 207, 0.18);
  color: rgba(210, 230, 223, 0.42);
  font-size: 9px;
}

.sound-footer span { color: var(--sound-accent); }
.sound-footer p { margin: 0; }

.gaia-audio-dock .gaia-audio-gallery-open {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: auto;
  height: 34px;
  flex: 0 0 auto;
  padding: 0 10px;
  color: rgba(226, 247, 240, 0.76);
  border: 0;
  border-left: 1px solid rgba(139, 226, 205, 0.2);
  border-radius: 0;
  background: transparent;
  font: 9px/1 Consolas, monospace;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.gaia-audio-dock .gaia-audio-gallery-open:hover,
.gaia-audio-dock .gaia-audio-gallery-open:focus-visible {
  color: #f3fffb;
  background: rgba(140, 233, 207, 0.08);
  box-shadow: none;
  outline: none;
  transform: none;
}

body.gaia-opening-active .gaia-audio-gallery-open {
  display: none;
}

.intro-lp-hero .intro-path-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(1000px, 100%);
}

.intro-path-card--sound {
  --path-rgb: 140, 233, 207;
}

.intro-lp-hero .intro-path-card--sound > p {
  max-width: 100%;
  font-size: clamp(7px, 0.48vw, 9px);
  letter-spacing: 0.035em;
  white-space: normal;
}

.intro-path-card--sound .intro-path-glyph--sound {
  color: #9be8d0;
  text-shadow: 0 0 20px rgba(123, 232, 202, 0.42);
}

@media (max-width: 920px) {
  .sound-layer { padding: 20px; }
  .sound-layout {
    grid-template-columns: 1fr;
    gap: 28px;
    overflow: auto;
  }
  .sound-track-panel { order: 2; }
  .sound-player {
    grid-template-columns: minmax(150px, 0.55fr) minmax(240px, 1fr);
  }
  .sound-planetarium { width: min(38vw, 300px); }
  .intro-lp-hero .intro-path-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .sound-header h2 { font-size: 24px; }
  .sound-header p span { display: none; }
  .sound-layout { padding: 22px 0; }
  .sound-player {
    grid-template-columns: 1fr;
    grid-template-areas: "disc" "info" "transport" "volume";
  }
  .sound-planetarium { width: min(68vw, 280px); margin-bottom: 24px; }
  .sound-now-playing { text-align: center; }
  .sound-now-playing h3 { font-size: 27px; white-space: normal; }
  .sound-footer p { display: none; }
  .intro-lp-hero .intro-path-grid { grid-template-columns: 1fr; }
  .gaia-audio-dock .gaia-audio-gallery-open strong { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .sound-layer,
  .sound-layer::before,
  .sound-planet,
  .sound-orbit::after {
    animation: none !important;
    transition: none !important;
  }
}