/* Experimental layers are intentionally isolated in this file for easy removal. */

:root {
  --base-rgb: 22, 22, 24;
}

/* EXPERIMENT: Ambient background */
.ambient-grain {
  position: absolute;
  inset: 0;
  z-index: 2;
  background-image:
    repeating-radial-gradient(circle at 24% 18%, rgba(255, 255, 255, 0.035) 0 0.45px, transparent 0.7px 3px),
    repeating-linear-gradient(112deg, rgba(255, 255, 255, 0.012) 0 1px, transparent 1px 4px);
  background-size: 4px 4px, 7px 7px;
  mix-blend-mode: soft-light;
  opacity: 0.22;
}

.ambient-shade {
  z-index: 3;
}

body[data-playback-state="paused"] .ambient-grain,
body[data-playback-state="offline"] .ambient-grain {
  opacity: 0.12;
}

/* EXPERIMENT: Artwork depth and reflection */
.art-wrap {
  --art-lift: 0px;
  --reflection-shift: 0%;
  --reflection-opacity: 0.12;
  transform:
    translate3d(0, var(--art-lift), 0)
    perspective(900px)
    rotateX(var(--tilt-x))
    rotateY(var(--tilt-y));
}

.art-reflection {
  position: absolute;
  inset: -35% -65%;
  z-index: 4;
  background: linear-gradient(
    108deg,
    transparent 34%,
    rgba(255, 255, 255, 0.03) 43%,
    rgba(255, 255, 255, 0.18) 49%,
    rgba(255, 255, 255, 0.035) 55%,
    transparent 64%
  );
  opacity: var(--reflection-opacity);
  transform: translate3d(var(--reflection-shift), 0, 0);
  transition: opacity 420ms ease;
  pointer-events: none;
}

.player.is-paused .art-reflection,
.player.is-offline .art-reflection {
  opacity: 0.04;
}

/* EXPERIMENT: Staged track arrival */
.track-copy,
.art-stage {
  transition:
    opacity 180ms ease,
    filter 220ms ease,
    transform 260ms var(--ease-cinematic);
}

.player.is-departing .track-copy {
  opacity: 0;
  filter: blur(4px);
  transform: translateY(-5px);
}

.player.is-departing .art-stage {
  opacity: 0;
  filter: saturate(0.72);
  animation: none;
  transform: translateY(4px) scale(0.975);
}

/* EXPERIMENT: Editorial typography */
.song-title {
  font-size: clamp(1.48rem, 4.2vw, 2.05rem);
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.song-title.is-short-title {
  max-width: min(18ch, 100%);
  font-size: clamp(1.85rem, 5.3vw, 2.55rem);
  line-height: 0.9;
}

.song-title.is-long-title {
  max-width: min(27ch, 100%);
  font-size: clamp(1.2rem, 3.15vw, 1.58rem);
  line-height: 1;
}

.title-word {
  display: inline-block;
}

.is-word-revealing .title-word {
  animation: experimental-word-reveal 420ms var(--ease-cinematic) both;
  animation-delay: calc(var(--word-index) * 26ms + 60ms);
}

.artist {
  letter-spacing: 0;
}

.album {
  letter-spacing: 0.04em;
}

.status {
  letter-spacing: 0;
}

.track-copy {
  gap: 0.28rem;
}

.actions {
  margin-top: 0.52rem;
}

/* EXPERIMENT: Local previous-track drawer */
.previous-toggle {
  grid-column: 3;
  justify-self: end;
}

.previous-toggle[aria-expanded="true"] {
  border-color: var(--text);
  color: var(--text);
  background: rgba(245, 243, 238, 0.1);
}

.previous-toggle .history-icon {
  position: relative;
  display: block;
  width: 0.78rem;
  height: 0.78rem;
  border: 1.35px solid currentColor;
  border-left-color: transparent;
  border-radius: 50%;
  transform: translateY(-0.01em) rotate(-32deg);
}

.previous-toggle .history-icon::before {
  position: absolute;
  top: -0.16rem;
  left: -0.13rem;
  width: 0;
  height: 0;
  border-top: 0.18rem solid transparent;
  border-bottom: 0.18rem solid transparent;
  border-right: 0.25rem solid currentColor;
  content: "";
}

.previous-drawer {
  position: fixed;
  z-index: 28;
  left: 50%;
  bottom: clamp(3.5rem, 7vh, 5rem);
  width: min(750px, calc(100vw - 3rem));
  padding: 1.08rem;
  border: 1px solid rgba(245, 243, 238, 0.11);
  border-radius: 10px;
  background: rgba(8, 8, 8, 0.94);
  box-shadow: 0 22px 72px rgba(0, 0, 0, 0.52);
  transform: translateX(-50%);
  animation: experimental-drawer-in 280ms var(--ease-cinematic) both;
}

.previous-drawer[hidden] {
  display: none;
}

.previous-drawer-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.87rem;
  color: rgba(245, 243, 238, 0.66);
  font-size: 0.87rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.previous-drawer-head button {
  border: 0;
  padding: 0.16rem 0.22rem;
  color: rgba(245, 243, 238, 0.5);
  background: transparent;
  font: inherit;
  font-size: 0.72rem;
  text-transform: uppercase;
  cursor: pointer;
}

.previous-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.82rem;
}

.previous-track {
  min-width: 0;
  display: grid;
  grid-template-rows: auto auto;
  gap: 0.5rem;
  padding: 0;
  border-radius: 3px;
  color: var(--text);
  background: transparent;
  text-decoration: none;
  transition:
    opacity 180ms ease,
    transform 180ms var(--ease-cinematic);
}

.previous-track:focus-visible {
  opacity: 1;
  transform: translateY(-2px);
}

.previous-track img,
.previous-art-fallback {
  width: 100%;
  aspect-ratio: 1;
  height: auto;
  border-radius: 3px;
  object-fit: cover;
}

.previous-art-fallback {
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.55);
  background: rgba(var(--base-rgb), 0.9);
  font-size: 0.98rem;
}

.previous-track-copy {
  min-width: 0;
  display: grid;
  gap: 0.12rem;
  opacity: 0.58;
  transition: opacity 180ms ease;
}

.previous-track:focus-visible .previous-track-copy {
  opacity: 0.92;
}

.previous-track strong,
.previous-track small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.previous-track strong {
  font-size: 0.87rem;
  font-weight: 600;
}

.previous-track small {
  color: rgba(245, 243, 238, 0.46);
  font-size: 0.72rem;
}

.previous-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 1.05rem 0.3rem;
  color: rgba(245, 243, 238, 0.46);
  font-size: 0.84rem;
}

.previous-track-skeleton {
  pointer-events: none;
}

.previous-skeleton-art,
.previous-skeleton-copy span {
  position: relative;
  overflow: hidden;
  background: rgba(245, 243, 238, 0.08);
}

.previous-skeleton-art {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 3px;
}

.previous-skeleton-copy {
  display: grid;
  gap: 0.32rem;
}

.previous-skeleton-copy span {
  display: block;
  width: 82%;
  height: 0.72rem;
  border-radius: 2px;
}

.previous-skeleton-copy span:last-child {
  width: 56%;
  height: 0.56rem;
}

.previous-skeleton-art::after,
.previous-skeleton-copy span::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(245, 243, 238, 0.1), transparent);
  transform: translateX(-100%);
  animation: experimental-skeleton-shimmer 1.35s ease-in-out infinite;
  content: "";
}

/* EXPERIMENT: Reversible status double-click afterglow */
.is-afterglow .ambient-grain {
  opacity: 0.34;
}

.is-afterglow .art-wrap {
  box-shadow:
    var(--shadow-x) var(--shadow-y) var(--shadow-blur) rgba(0, 0, 0, 0.44),
    0 0 72px rgba(var(--accent-rgb), 0.12);
}

@keyframes experimental-word-reveal {
  from {
    opacity: 0;
    filter: blur(5px);
    transform: translateY(0.72em);
  }

  to {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
  }
}

@keyframes experimental-drawer-in {
  from {
    opacity: 0;
    transform: translate(-50%, 18px);
  }

  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@keyframes experimental-skeleton-shimmer {
  to {
    transform: translateX(100%);
  }
}

@media (hover: hover) and (pointer: fine) {
  .previous-track:hover {
    opacity: 1;
    transform: translateY(-2px);
  }

  .previous-track:hover .previous-track-copy {
    opacity: 0.92;
  }
}

@media (max-width: 720px) {
  .previous-drawer {
    bottom: calc(4.2rem + env(safe-area-inset-bottom, 0px));
    width: min(560px, calc(100vw - 1.2rem));
    padding: 0.82rem;
    border-radius: 8px;
  }

  .previous-drawer-head {
    margin-bottom: 0.68rem;
    font-size: 0.7rem;
  }

  .previous-drawer-head button {
    font-size: 0.62rem;
  }

  .previous-list {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: 118px;
    gap: 0.65rem;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
  }

  .previous-list::-webkit-scrollbar {
    display: none;
  }

  .previous-track {
    gap: 0.4rem;
  }

  .previous-track strong {
    font-size: 0.72rem;
  }

  .previous-track small {
    font-size: 0.58rem;
  }

  .track-copy {
    gap: 0.22rem;
  }

  .actions {
    margin-top: 0.42rem;
  }
}

@media (max-width: 420px) {
  .song-title.is-short-title {
    font-size: clamp(1.68rem, 8.8vw, 2.2rem);
  }

  .song-title.is-long-title {
    font-size: clamp(1.12rem, 5.4vw, 1.42rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .art-reflection {
    display: none;
  }

  .title-word,
  .previous-drawer,
  .previous-skeleton-art::after,
  .previous-skeleton-copy span::after {
    animation: none !important;
  }
}