/* ============================================================
   THE MACHINE — vertical brushed-aluminium player, glass, 6 CDs,
   sliding mechanical tonearm. Original design inspired by the
   minimalist luxury hi-fi idiom (no trademarks/logos).
   ============================================================ */

.machine {
  position: relative;
  width: var(--machine-w);
  padding: calc(var(--machine-w) * 0.085) calc(var(--machine-w) * 0.07);
  border-radius: calc(var(--machine-w) * 0.045);
  /* brushed cylindrical sheen across the panel */
  background:
    repeating-linear-gradient(to right,
      rgba(255,255,255,.020) 0 1px, rgba(0,0,0,.018) 1px 2px),
    linear-gradient(96deg,
      #5f5c57 0%, #9b9892 9%, #cbc8c2 22%, #e3e0da 31%,
      #b7b4ae 44%, #8d8a85 58%, #c4c1bb 72%, #a09d97 86%, #6b6863 100%);
  box-shadow:
    /* outer drop */
    0 40px 90px -30px rgba(0,0,0,.85),
    0 8px 28px -12px rgba(0,0,0,.7),
    /* crisp bezel edges */
    inset 0 1px 0 rgba(255,255,255,.55),
    inset 0 0 0 1px rgba(255,255,255,.10),
    inset 0 -2px 6px rgba(0,0,0,.35),
    inset 2px 0 6px rgba(0,0,0,.18),
    inset -2px 0 6px rgba(0,0,0,.18);
  isolation: isolate;
  transition: filter 1.4s ease;
}

/* recessed dark inner channel that the discs sit within */
.machine__well {
  position: relative;
  border-radius: calc(var(--machine-w) * 0.03);
  padding: calc(var(--machine-w) * 0.06) calc(var(--machine-w) * 0.05);
  background:
    linear-gradient(180deg, #0c0b0a, #131210 50%, #0c0b0a);
  box-shadow:
    inset 0 2px 10px rgba(0,0,0,.9),
    inset 0 0 0 1px rgba(0,0,0,.6),
    inset 0 1px 0 rgba(255,255,255,.04);
}

.machine__discs {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--disc-gap);
  /* leave a right channel for the rail */
  padding-right: calc(var(--disc) * 0.30);
  z-index: 2;
}

/* ---- CD discs ---- */
.disc {
  --accent: #d9bd83;
  position: relative;
  width: var(--disc);
  height: var(--disc);
  border-radius: 50%;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.disc__glow {
  position: absolute;
  inset: -14%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%,
    var(--accent) 0%, transparent 62%);
  opacity: 0;
  filter: blur(8px);
  transition: opacity 1s ease;
  pointer-events: none;
  z-index: 0;
}

.disc__platter {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  z-index: 1;
  background:
    var(--art, radial-gradient(circle at 38% 30%, #2a2723, #131110 70%));
  background-size: cover;
  background-position: center;
  box-shadow:
    inset 0 0 0 2px rgba(0,0,0,.55),
    inset 0 0 14px rgba(0,0,0,.55),
    0 6px 16px -6px rgba(0,0,0,.7);
  overflow: hidden;
  transform-origin: 50% 50%;
  /* CDs read as monochrome stills until their chapter is the one playing */
  filter: grayscale(1) brightness(.82);
  transition: filter 1.1s ease;
}

/* iridescent CD data sheen */
.disc__platter::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    conic-gradient(from 0deg,
      rgba(255,180,120,.10), rgba(140,200,255,.12), rgba(180,255,200,.10),
      rgba(255,200,150,.12), rgba(180,160,255,.10), rgba(255,180,120,.10));
  mix-blend-mode: screen;
  opacity: .5;
  pointer-events: none;
}

/* glass highlight that sweeps across the disc */
.disc__platter::after {
  content: "";
  position: absolute;
  inset: -25%;
  background: linear-gradient(115deg,
    transparent 38%, rgba(255,255,255,.32) 48%, rgba(255,255,255,.05) 54%, transparent 60%);
  transform: translateX(-12%);
  transition: transform 1.1s cubic-bezier(.22,1,.36,1), opacity .6s;
  opacity: .5;
  pointer-events: none;
}

/* center hub + spindle hole */
.disc__hub {
  position: absolute;
  left: 50%; top: 50%;
  width: 23%; height: 23%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  z-index: 2;
  background:
    radial-gradient(circle at 42% 38%, #f1eee9, #b9b6b0 46%, #6f6c67 80%, #4b4844);
  box-shadow:
    0 1px 3px rgba(0,0,0,.6),
    inset 0 0 0 1px rgba(255,255,255,.4);
  pointer-events: none;
}
.disc__hub::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 30%; height: 30%;
  transform: translate(-50%,-50%);
  border-radius: 50%;
  background: radial-gradient(circle, #0a0908, #1c1a18);
  box-shadow: inset 0 0 2px rgba(0,0,0,.9);
}

/* spinning when active */
.disc.is-spinning .disc__platter {
  animation: discSpin 16s linear infinite;
}
@keyframes discSpin { to { transform: rotate(360deg); } }

/* active state glow + lift */
.disc.is-active .disc__glow { opacity: .85; }
.disc.is-active .disc__platter {
  /* the active disc blooms into full colour */
  filter: grayscale(0) brightness(1);
  box-shadow:
    inset 0 0 0 2px rgba(0,0,0,.5),
    inset 0 0 18px rgba(0,0,0,.4),
    0 0 26px -2px var(--accent),
    0 10px 22px -8px rgba(0,0,0,.7);
}
/* dim non-active discs while a chapter plays */
.stage.state-playing .disc:not(.is-active) { opacity: .42; transition: opacity 1s ease; }
.stage.state-playing .disc:not(.is-active) .disc__platter { animation-play-state: paused; }

/* hover (desktop only) */
@media (hover: hover) {
  .disc:hover .disc__glow { opacity: .55; }
  .disc:hover .disc__platter::after { transform: translateX(40%); opacity: .8; }
}

/* finale: every disc lit — and every memory returns to full colour */
.stage.state-ending .disc { opacity: 1 !important; }
.stage.state-ending .disc .disc__glow { opacity: .8; transition: opacity 1.6s ease; }
.stage.state-ending .disc__platter { filter: grayscale(0) brightness(1); }

/* number etched faintly under each disc on the metal */
.disc__no {
  position: absolute;
  right: -14%;
  bottom: 6%;
  font: 500 calc(var(--disc) * 0.085)/1 var(--ui);
  letter-spacing: .18em;
  color: rgba(20,18,16,.45);
  text-shadow: 0 1px 0 rgba(255,255,255,.25);
  pointer-events: none;
}

/* ---- Rail + tonearm ---- */
.machine__rail {
  position: absolute;
  top: calc(var(--machine-w) * 0.14);
  bottom: calc(var(--machine-w) * 0.14);
  right: calc(var(--machine-w) * 0.115);
  width: calc(var(--machine-w) * 0.016);
  border-radius: 4px;
  background: linear-gradient(90deg, #0c0b0a, #2a2825 45%, #56524d 50%, #2a2825 55%, #0c0b0a);
  box-shadow: inset 0 0 2px rgba(0,0,0,.9), 0 0 0 1px rgba(255,255,255,.05);
  z-index: 3;
}

.arm {
  position: absolute;
  right: calc(var(--machine-w) * 0.075);
  top: 0;
  height: 0;
  z-index: 4;
  transform: translateY(var(--arm-y, 80px));
  will-change: transform;
}

/* carriage block riding the rail */
.arm__carriage {
  position: absolute;
  right: 0; top: 50%;
  width: calc(var(--machine-w) * 0.10);
  height: calc(var(--machine-w) * 0.12);
  transform: translateY(-50%);
  border-radius: 4px;
  background:
    linear-gradient(100deg, #6f6c67, #c9c6c0 35%, #e6e3dd 50%, #a7a49e 70%, #6f6c67);
  box-shadow:
    0 4px 10px -3px rgba(0,0,0,.7),
    inset 0 1px 0 rgba(255,255,255,.6),
    inset 0 -2px 4px rgba(0,0,0,.4);
}
.arm__carriage::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 30%; height: 30%;
  transform: translate(-50%,-50%);
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, var(--accent, #d9bd83), #6a5a32);
  box-shadow: 0 0 8px -1px var(--accent, #d9bd83), inset 0 0 0 1px rgba(0,0,0,.3);
  transition: background .8s ease, box-shadow .8s ease;
}

/* the tonearm reaching left, over the active disc */
.arm__tone {
  position: absolute;
  right: calc(var(--machine-w) * 0.05);
  top: 50%;
  width: calc(var(--disc) * 0.62);
  height: calc(var(--machine-w) * 0.022);
  transform-origin: 100% 50%;
  transform: translateY(-50%) rotate(8deg);
  border-radius: 4px;
  background: linear-gradient(180deg, #e6e3dd, #b3b0aa 45%, #7d7a75 55%, #56524d);
  box-shadow:
    0 3px 7px -2px rgba(0,0,0,.7),
    inset 0 1px 0 rgba(255,255,255,.6);
  transition: transform 1.1s cubic-bezier(.34,1.2,.4,1);
}
/* pickup head at the far (left) tip */
.arm__tone::after {
  content: "";
  position: absolute;
  left: calc(var(--machine-w) * -0.012);
  top: 50%;
  width: calc(var(--machine-w) * 0.05);
  height: calc(var(--machine-w) * 0.05);
  transform: translateY(-50%);
  border-radius: 3px;
  background: linear-gradient(135deg, #d8d5cf, #807d78);
  box-shadow: 0 2px 5px rgba(0,0,0,.6), inset 0 1px 0 rgba(255,255,255,.5);
}
/* tip indicator light */
.arm__tone::before {
  content: "";
  position: absolute;
  left: calc(var(--machine-w) * 0.002);
  top: 50%;
  width: calc(var(--machine-w) * 0.012);
  height: calc(var(--machine-w) * 0.012);
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--accent, #d9bd83);
  box-shadow: 0 0 6px 1px var(--accent, #d9bd83);
  opacity: 0;
  transition: opacity .8s ease;
  z-index: 2;
}
.arm.is-engaged .arm__tone { transform: translateY(-50%) rotate(-1deg); }
.arm.is-engaged .arm__tone::before { opacity: 1; }

/* ---- display / etched mark ---- */
.machine__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: calc(var(--machine-w) * 0.05);
  padding: 0 calc(var(--machine-w) * 0.01);
}
.machine__mark {
  display: flex; align-items: center; gap: .5em;
  font: 500 calc(var(--machine-w) * 0.026)/1 var(--ui);
  letter-spacing: .42em;
  text-transform: uppercase;
  color: rgba(20,18,16,.5);
  text-shadow: 0 1px 0 rgba(255,255,255,.35);
}
.machine__mark .dot {
  width: .5em; height: .5em; border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #fff, var(--gold));
  box-shadow: 0 0 5px var(--gold);
}
.machine__display {
  font: 400 calc(var(--machine-w) * 0.03)/1 var(--ui);
  letter-spacing: .3em;
  color: var(--gold);
  text-shadow: 0 0 8px rgba(217,189,131,.5);
  padding: .35em .7em;
  border-radius: 3px;
  background: linear-gradient(180deg, #0a0908, #151311);
  box-shadow: inset 0 1px 3px rgba(0,0,0,.9), inset 0 0 0 1px rgba(255,255,255,.05);
  min-width: 3.4em;
  text-align: center;
}

/* ---- glass front sheen over the whole machine ---- */
.machine__glass {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  z-index: 6;
  background: linear-gradient(125deg,
    rgba(255,255,255,.0) 30%,
    rgba(255,255,255,.16) 44%,
    rgba(255,255,255,.04) 50%,
    rgba(255,255,255,.0) 60%);
  background-size: 220% 220%;
  background-position: var(--sheen, 30%) 30%;
  transition: background-position 1.6s ease;
  mix-blend-mode: screen;
}