:root {
  color-scheme: dark;
  --bg-0: #05010d;
  --bg-1: #100220;
  --bg-2: #2c0753;
  --violet: #a855f7;
  --hot: #f04dff;
  --cyan: #5ce7ff;
  --text: #f7efff;
  --muted: #b8a9ce;
  --line: rgba(211, 146, 255, 0.2);
  --music-energy: 0;
  --music-beat: 0;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  overflow: hidden;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 35%, rgba(168, 85, 247, 0.32), transparent 34%),
    radial-gradient(circle at 20% 18%, rgba(240, 77, 255, 0.18), transparent 26%),
    linear-gradient(140deg, var(--bg-0), var(--bg-1) 48%, var(--bg-2));
}

button,
input {
  font: inherit;
}

.stage-shell {
  position: relative;
  width: 100vw;
  height: 100vh;
  min-height: 640px;
  overflow: hidden;
}

.stage-shell::before,
.stage-shell::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: 999px;
  filter: blur(36px);
  opacity: 0.68;
}

.stage-shell::before {
  width: 42vw;
  height: 42vw;
  left: 10vw;
  top: 8vh;
  background: rgba(83, 26, 148, 0.38);
}

.stage-shell::after {
  width: 48vw;
  height: 48vw;
  right: -18vw;
  bottom: -24vw;
  background: rgba(196, 52, 255, 0.28);
}

#stageCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.cube-character {
  position: absolute;
  left: 50%;
  top: 36%;
  z-index: 1;
  width: clamp(180px, 19vw, 300px);
  height: clamp(230px, 24vw, 360px);
  transform-style: preserve-3d;
  perspective: 900px;
  transform: translate(-50%, -50%) translateY(calc(var(--music-beat) * -56px));
  filter: drop-shadow(0 0 calc(34px + var(--music-energy) * 46px) rgba(169, 74, 255, 0.72));
}

.cube-body {
  --cube-size: clamp(150px, 16vw, 245px);
  position: absolute;
  left: 50%;
  top: 38%;
  width: var(--cube-size);
  height: var(--cube-size);
  transform-style: preserve-3d;
  transform:
    translate(-50%, -50%)
    rotateX(calc(-13deg + var(--music-energy) * 16deg))
    rotateY(calc(-28deg + var(--music-beat) * 52deg))
    rotateZ(calc(-4deg + var(--music-beat) * 12deg))
    scale(calc(1 + var(--music-beat) * 0.12));
  animation: cubeIdle 3.6s ease-in-out infinite;
}

.cube-part {
  position: absolute;
  inset: 0;
  border: 2px solid rgba(231, 174, 255, 0.74);
  border-radius: 18px;
  background:
    radial-gradient(circle at 50% 48%, rgba(240, 77, 255, calc(0.24 + var(--music-energy) * 0.34)), transparent 46%),
    linear-gradient(135deg, rgba(11, 2, 24, 0.98), rgba(48, 10, 86, 0.94) 55%, rgba(119, 42, 181, 0.84));
  box-shadow:
    inset 0 0 44px rgba(238, 92, 255, calc(0.18 + var(--music-energy) * 0.34)),
    0 0 30px rgba(168, 85, 247, calc(0.28 + var(--music-energy) * 0.42));
  backface-visibility: visible;
}

.cube-front {
  transform: translateZ(calc(var(--cube-size) / 2));
}

.cube-back {
  transform: rotateY(180deg) translateZ(calc(var(--cube-size) / 2));
  opacity: 0.58;
}

.cube-right {
  transform: rotateY(90deg) translateZ(calc(var(--cube-size) / 2));
  filter: brightness(0.84);
}

.cube-left {
  transform: rotateY(-90deg) translateZ(calc(var(--cube-size) / 2));
  filter: brightness(0.62);
}

.cube-top {
  transform: rotateX(90deg) translateZ(calc(var(--cube-size) / 2));
  filter: brightness(1.2);
}

.cube-bottom {
  transform: rotateX(-90deg) translateZ(calc(var(--cube-size) / 2));
  filter: brightness(0.48);
}

.face-screen {
  position: absolute;
  inset: 18%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 16px;
  background:
    radial-gradient(circle at 50% 56%, rgba(92, 231, 255, 0.12), transparent 58%),
    rgba(5, 1, 14, 0.72);
  box-shadow:
    inset 0 0 22px rgba(0, 0, 0, 0.34),
    0 0 22px rgba(240, 77, 255, 0.32);
}

.eye {
  position: absolute;
  top: calc(32% - var(--music-beat) * 4%);
  width: 17%;
  height: calc(20% + var(--music-beat) * 8%);
  border-radius: 999px;
  background: #f8e9ff;
  box-shadow:
    0 0 18px rgba(92, 231, 255, 0.95),
    0 0 34px rgba(240, 77, 255, 0.52);
}

.eye-left {
  left: 24%;
}

.eye-right {
  right: 24%;
}

.mouth {
  position: absolute;
  left: 29%;
  bottom: 23%;
  width: 42%;
  height: calc(17% + var(--music-beat) * 12%);
  border-bottom: clamp(6px, 0.6vw, 10px) solid #f8e9ff;
  border-radius: 0 0 999px 999px;
  box-shadow: 0 12px 22px rgba(240, 77, 255, 0.56);
}

.limb {
  position: absolute;
  z-index: -1;
  border: 1px solid rgba(231, 174, 255, 0.68);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(17, 4, 33, 0.98), rgba(129, 43, 194, 0.84));
  box-shadow: 0 0 24px rgba(168, 85, 247, 0.46);
  transform-origin: 50% 12%;
}

.arm {
  top: 30%;
  width: 16%;
  height: 34%;
}

.arm-left {
  left: 6%;
  transform: rotate(calc(-28deg - var(--music-beat) * 42deg));
}

.arm-right {
  right: 6%;
  transform: rotate(calc(30deg + var(--music-beat) * 42deg));
}

.foot {
  bottom: 6%;
  width: 24%;
  height: 13%;
}

.foot-left {
  left: 26%;
  transform: rotate(calc(6deg + var(--music-beat) * 18deg));
}

.foot-right {
  right: 20%;
  transform: rotate(calc(-7deg - var(--music-beat) * 18deg));
}

.cube-shadow {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 82%;
  height: 17%;
  transform: translateX(-50%) scale(calc(1 - var(--music-beat) * 0.18));
  border-radius: 999px;
  background: radial-gradient(ellipse, rgba(92, 231, 255, 0.22), rgba(168, 85, 247, 0.18) 42%, transparent 72%);
  filter: blur(8px);
}

body.is-playing .cube-body {
  animation-duration: 1.4s;
}

@keyframes cubeIdle {
  0%,
  100% {
    margin-top: 0;
  }

  50% {
    margin-top: -14px;
  }
}

.hud {
  position: absolute;
  left: clamp(18px, 4vw, 56px);
  right: clamp(18px, 4vw, 56px);
  bottom: clamp(18px, 4vw, 42px);
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(220px, 1.2fr) auto minmax(260px, 0.8fr);
  gap: 20px;
  align-items: end;
  padding: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(15, 7, 29, 0.82), rgba(45, 10, 78, 0.54));
  backdrop-filter: blur(18px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.42), 0 0 48px rgba(151, 71, 255, 0.14);
}

.track-meta {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--cyan);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  overflow: hidden;
  color: var(--text);
  font-size: clamp(22px, 3vw, 38px);
  line-height: 1.05;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-meta p:last-child {
  margin: 8px 0 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.transport {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.icon-button,
.play-button,
.upload-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid rgba(218, 174, 255, 0.28);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.icon-button {
  width: 44px;
  font-size: 30px;
  line-height: 1;
}

.play-button {
  min-width: 92px;
  padding: 0 20px;
  color: #170022;
  background: linear-gradient(135deg, #f6d6ff, #a855f7 62%, #5ce7ff);
  font-weight: 800;
  box-shadow: 0 0 32px rgba(168, 85, 247, 0.45);
}

.icon-button:hover,
.play-button:hover,
.upload-button:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.62);
}

.timeline-row {
  grid-column: 1 / 3;
  display: grid;
  grid-template-columns: 44px minmax(140px, 1fr) 44px;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--hot);
}

.utility-row {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: flex-end;
}

#fileInput {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.upload-button {
  min-width: 94px;
  padding: 0 14px;
  font-size: 14px;
}

.volume-control {
  display: grid;
  grid-template-columns: auto 104px;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}

.playlist-panel {
  grid-row: 1 / 3;
  grid-column: 3;
  min-width: 0;
  align-self: stretch;
}

.playlist-heading {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.playlist {
  max-height: 112px;
  margin-top: 9px;
  overflow: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.playlist-item,
.playlist-empty {
  width: 100%;
  padding: 10px 0;
  border: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  background: transparent;
  text-align: left;
}

.playlist-item {
  cursor: pointer;
}

.playlist-item strong {
  display: block;
  overflow: hidden;
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.playlist-item span,
.playlist-empty {
  color: var(--muted);
  font-size: 12px;
}

.playlist-item.is-active strong {
  color: var(--cyan);
}

.playlist-item.is-active span {
  color: rgba(92, 231, 255, 0.86);
}

@media (max-width: 860px) {
  body {
    overflow: auto;
  }

  .stage-shell {
    min-height: 760px;
  }

  .hud {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .timeline-row,
  .playlist-panel {
    grid-column: auto;
    grid-row: auto;
  }

  .utility-row {
    justify-content: space-between;
  }
}

@media (max-width: 520px) {
  .stage-shell {
    min-height: 820px;
  }

  .hud {
    padding: 14px;
  }

  h1 {
    white-space: normal;
  }

  .track-meta p:last-child {
    white-space: normal;
  }

  .utility-row,
  .volume-control {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .upload-button {
    width: 100%;
  }
}