/* The player shell: enamel body, brand, readout, panel and transport keys.
   Every size is a multiple of --u so the whole object scales without clipping. */

.device {
  position: relative;
  flex: none;
  width: var(--device-w);
  height: calc(var(--device-w) * var(--ratio));
  display: grid;
  grid-template-rows: 32fr 57fr 13fr 27fr 27fr;
  gap: calc(var(--u) * 1.5);
  padding: calc(var(--u) * 3.5) calc(var(--u) * 4) calc(var(--u) * 4.5);
  border-radius: calc(var(--u) * 8.5);
  color: var(--ink);
  background:
    url('../assets/wear-speckle.svg') 0 0 / calc(var(--u) * 52) auto,
    radial-gradient(130% 70% at 28% 0%, rgba(255, 255, 255, 0.3), transparent 60%),
    linear-gradient(176deg, var(--blue-hi) 0%, var(--blue) 30%, #93adc4 68%, var(--blue-lo) 100%);
  box-shadow:
    0 calc(var(--u) * 4) calc(var(--u) * 7) rgba(0, 0, 0, 0.6),
    0 calc(var(--u) * 0.8) calc(var(--u) * 1.2) rgba(0, 0, 0, 0.55),
    inset 0 calc(var(--u) * 0.55) calc(var(--u) * 0.5) rgba(255, 255, 255, 0.6),
    inset 0 calc(var(--u) * -1) calc(var(--u) * 1.4) rgba(43, 66, 94, 0.6),
    inset calc(var(--u) * 0.7) 0 calc(var(--u) * 0.9) rgba(255, 255, 255, 0.2),
    inset calc(var(--u) * -0.7) 0 calc(var(--u) * 1) rgba(43, 66, 94, 0.35);
  user-select: none;
  -webkit-user-select: none;
  isolation: isolate;
}

/* Aged enamel: chips and rust gathered at the rim, where a carried object
   actually wears. Kept clear of every label. */
.device__wear {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
}

.device__wear::before,
.device__wear::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: url('../assets/wear-chips.svg') center / 100% 100% no-repeat;
}

.device__wear::before {
  -webkit-mask-image:
    linear-gradient(to right, #000 0%, transparent 4.2%, transparent 95.8%, #000 100%),
    linear-gradient(to bottom, #000 0%, transparent 2.6%, transparent 96.6%, #000 100%);
  mask-image:
    linear-gradient(to right, #000 0%, transparent 4.2%, transparent 95.8%, #000 100%),
    linear-gradient(to bottom, #000 0%, transparent 2.6%, transparent 96.6%, #000 100%);
}

/* A few stray chips out in the open, well away from the lettering. */
.device__wear::after {
  transform: scaleX(-1);
  opacity: 0.55;
  -webkit-mask-image:
    radial-gradient(18% 9% at 92% 13%, #000 30%, transparent 100%),
    radial-gradient(14% 7% at 7% 71%, #000 30%, transparent 100%),
    radial-gradient(20% 6% at 80% 97%, #000 30%, transparent 100%);
  mask-image:
    radial-gradient(18% 9% at 92% 13%, #000 30%, transparent 100%),
    radial-gradient(14% 7% at 7% 71%, #000 30%, transparent 100%),
    radial-gradient(20% 6% at 80% 97%, #000 30%, transparent 100%);
}

/* Molded seam running just inside the rim. */
.device__seam {
  position: absolute;
  inset: calc(var(--u) * 1.5);
  z-index: 0;
  border-radius: calc(var(--u) * 7.2);
  pointer-events: none;
  box-shadow:
    inset 0 0 0 calc(var(--u) * 0.16) rgba(43, 66, 94, 0.38),
    inset 0 calc(var(--u) * 0.36) 0 calc(var(--u) * 0.02) rgba(255, 255, 255, 0.4),
    0 0 0 calc(var(--u) * 0.16) rgba(255, 255, 255, 0.2);
}

.device > :not(.device__wear):not(.device__seam):not(.strap) {
  position: relative;
  z-index: 1;
}

/* ---- carry strap ------------------------------------------------------------ */

.strap {
  position: absolute;
  z-index: 2;
  left: calc(var(--u) * -1.2);
  top: calc(var(--u) * -3.2);
  width: calc(var(--u) * 26);
  height: calc(var(--u) * 30);
  pointer-events: none;
  overflow: hidden;
}

.strap__band {
  position: absolute;
  left: calc(var(--u) * 0.3);
  top: calc(var(--u) * -12);
  width: calc(var(--u) * 7.4);
  height: calc(var(--u) * 36);
  transform: rotate(33deg);
  transform-origin: 50% 100%;
  border-radius: calc(var(--u) * 0.4);
  background:
    repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.16) 0 calc(var(--u) * 0.22), transparent calc(var(--u) * 0.22) calc(var(--u) * 0.6)),
    linear-gradient(
      90deg,
      #2d3d5f 0 14%,
      #e3d2aa 14% 33%,
      #b23a2c 33% 67%,
      #e3d2aa 67% 86%,
      #2d3d5f 86% 100%
    );
  box-shadow:
    calc(var(--u) * 0.6) calc(var(--u) * 0.9) calc(var(--u) * 1.2) rgba(0, 0, 0, 0.45),
    inset 0 0 calc(var(--u) * 1) rgba(60, 35, 10, 0.35);
}

.strap__lug {
  position: absolute;
  left: calc(var(--u) * 0.2);
  top: calc(var(--u) * 19.5);
  width: calc(var(--u) * 7.6);
  height: calc(var(--u) * 7.2);
  border-radius: calc(var(--u) * 1) calc(var(--u) * 1) calc(var(--u) * 2.4) calc(var(--u) * 2.4);
  background:
    radial-gradient(circle at 50% 46%, var(--brass-hi) 0 16%, var(--brass) 17% 30%, var(--brass-lo) 32% 36%, transparent 38%),
    linear-gradient(160deg, #d9b468, #9c7430 60%, #7b5624);
  box-shadow:
    0 calc(var(--u) * 0.5) calc(var(--u) * 0.8) rgba(0, 0, 0, 0.5),
    inset 0 calc(var(--u) * 0.2) 0 rgba(255, 240, 190, 0.6);
}

/* ---- brand: small "The", the original logo as hero, modest "Player" ---------- */

.brand {
  display: grid;
  place-items: center;
  min-height: 0;
}

.brand__title {
  margin: 0;
  width: 100%;
  display: grid;
  justify-items: center;
  align-content: center;
  position: relative;
  font-weight: 400;
  font-size: calc(var(--u) * 4);
  line-height: 1;
}

/* Thin printed rules either side of the mark. */
.brand__title::before,
.brand__title::after {
  content: '';
  position: absolute;
  top: 52%;
  width: calc(var(--u) * 12);
  height: calc(var(--u) * 0.32);
  border-radius: 1px;
  background: var(--ink);
  opacity: 0.75;
}

.brand__title::before {
  left: calc(var(--u) * 12);
}

.brand__title::after {
  right: calc(var(--u) * 12);
}

.brand__the {
  font-family: var(--font-slab);
  font-style: italic;
  font-weight: 700;
  font-size: calc(var(--u) * 3.7);
  letter-spacing: 0.02em;
  /* Sits in the open space above "amb's", beside the tall L. */
  position: absolute;
  z-index: 1;
  left: 50%;
  top: calc(var(--u) * -0.6);
  transform: translateX(calc(var(--u) * -7.4));
}

/* The original Lamb's Tales mark, isolated from the photographed letterhead and
   printed in one ink. It is a mask, so the shapes are exactly the original's. */
.brand__logo {
  display: block;
  width: calc(var(--u) * 33.5);
  aspect-ratio: 1664 / 1236;
  margin-top: calc(var(--u) * 1.2);
  background: var(--ink);
  -webkit-mask: url('../assets/logo-mask.png') center / contain no-repeat;
  mask: url('../assets/logo-mask.png') center / contain no-repeat;
}

.brand__player {
  font-family: var(--font-script);
  font-weight: 900;
  font-size: calc(var(--u) * 6.6);
  line-height: 0.82;
  margin-top: calc(var(--u) * -0.5);
  transform: translateX(calc(var(--u) * -4));
}

/* ---- readout: counter, status, flip ------------------------------------------ */

.readout {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: calc(var(--u) * 2);
  padding: 0 calc(var(--u) * 1);
  min-height: 0;
}

.counter {
  position: relative;
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  column-gap: calc(var(--u) * 1.2);
  padding: calc(var(--u) * 1.3) calc(var(--u) * 2) calc(var(--u) * 1.7);
  min-width: calc(var(--u) * 30);
  border-radius: calc(var(--u) * 1.1);
  background: linear-gradient(#0e0b09, #1d1713);
  color: #f4ecd8;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  box-shadow:
    inset 0 calc(var(--u) * 0.5) calc(var(--u) * 0.8) #000,
    0 calc(var(--u) * 0.2) 0 rgba(255, 255, 255, 0.45),
    0 0 0 calc(var(--u) * 0.35) rgba(43, 66, 94, 0.55);
}

.counter__now {
  font-size: max(15px, calc(var(--u) * 4.6));
  font-weight: 600;
  letter-spacing: 0.04em;
}

.counter__total {
  font-size: max(11px, calc(var(--u) * 2.9));
  color: #cfc3a6;
  white-space: nowrap;
}

.counter__bar {
  position: absolute;
  left: calc(var(--u) * 2);
  right: calc(var(--u) * 2);
  bottom: calc(var(--u) * 0.8);
  height: max(2px, calc(var(--u) * 0.5));
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.16);
  overflow: hidden;
}

.counter__bar i {
  display: block;
  height: 100%;
  width: var(--progress, 0%);
  background: #e7b25c;
}

.status {
  margin: 0;
  text-align: center;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: max(11px, calc(var(--u) * 2.9));
  line-height: 1.15;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  text-wrap: balance;
}

.flip {
  min-height: max(44px, calc(var(--u) * 11.6));
  min-width: calc(var(--u) * 23);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: calc(var(--u) * 1.3);
  padding: 0 calc(var(--u) * 2.4);
  border: 0;
  border-radius: calc(var(--u) * 2);
  color: var(--key-ink);
  background:
    url('../assets/wear-stain.svg') 30% 60% / calc(var(--u) * 30) auto,
    linear-gradient(180deg, var(--cream-hi), var(--cream) 55%, var(--cream-lo));
  box-shadow:
    0 calc(var(--u) * 0.8) 0 var(--cream-edge),
    0 calc(var(--u) * 1.2) calc(var(--u) * 0.9) rgba(20, 30, 45, 0.55),
    inset 0 calc(var(--u) * 0.3) calc(var(--u) * 0.2) rgba(255, 255, 255, 0.85);
  transform: translateY(calc(var(--u) * -0.5));
  transition:
    transform 70ms ease-out,
    box-shadow 70ms ease-out;
}

.flip svg {
  width: calc(var(--u) * 4.6);
  height: calc(var(--u) * 4.6);
  flex: none;
}

.flip__text {
  display: grid;
  text-align: left;
  font-family: var(--font-label);
  font-weight: 700;
  font-size: max(13px, calc(var(--u) * 3.5));
  line-height: 1;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.flip__text small {
  margin-top: calc(var(--u) * 0.5);
  font-size: max(10px, calc(var(--u) * 2.3));
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.flip:active:not([aria-disabled='true']),
.flip.is-down {
  transform: translateY(calc(var(--u) * 0.2));
  box-shadow:
    0 calc(var(--u) * 0.15) 0 var(--cream-edge),
    0 calc(var(--u) * 0.3) calc(var(--u) * 0.4) rgba(20, 30, 45, 0.55),
    inset 0 calc(var(--u) * 0.3) calc(var(--u) * 0.4) rgba(120, 90, 50, 0.3);
}

.flip[aria-disabled='true'] {
  color: rgba(53, 38, 28, 0.55);
}

/* ---- panel: speaker grille, sound-effects switch, volume ---------------------- */

.panel {
  display: grid;
  grid-template-columns: 43fr auto 50fr;
  align-items: center;
  gap: calc(var(--u) * 2.6);
  padding: 0 calc(var(--u) * 4) 0 calc(var(--u) * 2.5);
  min-height: 0;
}

.grille {
  display: grid;
  gap: calc(var(--u) * 1.5);
}

.grille i {
  display: block;
  height: calc(var(--u) * 2.1);
  border-radius: calc(var(--u) * 1.1);
  background:
    repeating-linear-gradient(60deg, rgba(198, 154, 76, 0.5) 0 calc(var(--u) * 0.18), transparent calc(var(--u) * 0.18) calc(var(--u) * 0.6)),
    repeating-linear-gradient(-60deg, rgba(198, 154, 76, 0.4) 0 calc(var(--u) * 0.18), transparent calc(var(--u) * 0.18) calc(var(--u) * 0.6)),
    #2a1e14;
  box-shadow:
    inset 0 calc(var(--u) * 0.5) calc(var(--u) * 0.6) rgba(0, 0, 0, 0.85),
    0 calc(var(--u) * 0.22) 0 rgba(255, 255, 255, 0.5),
    0 calc(var(--u) * -0.14) 0 rgba(43, 66, 94, 0.5);
}

.panel__rule {
  width: calc(var(--u) * 0.32);
  height: 82%;
  border-radius: 1px;
  background: var(--ink);
  opacity: 0.6;
}

.panel__controls {
  display: grid;
  gap: calc(var(--u) * 0.4);
  justify-items: center;
}

.legend {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: max(11px, calc(var(--u) * 2.9));
  line-height: 1;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
}

.toggle__row {
  display: flex;
  align-items: center;
  gap: calc(var(--u) * 1);
}

.legend--end {
  min-width: calc(var(--u) * 5.5);
  text-align: center;
}

/* A brass toggle switch. The lever leans toward ON or OFF; the words say which. */
.toggle {
  width: 100%;
  min-height: max(44px, calc(var(--u) * 12));
  display: grid;
  justify-items: center;
  align-content: center;
  gap: calc(var(--u) * 0.5);
  padding: calc(var(--u) * 0.4) 0;
  border: 0;
  background: none;
  color: inherit;
  border-radius: calc(var(--u) * 2);
}

.toggle__plate {
  position: relative;
  width: calc(var(--u) * 16);
  height: calc(var(--u) * 7.4);
  border-radius: calc(var(--u) * 3.7);
  background:
    radial-gradient(34% 58% at 50% 50%, #1a120b 0 88%, transparent 100%),
    linear-gradient(170deg, var(--brass-hi), var(--brass) 45%, var(--brass-lo));
  box-shadow:
    0 calc(var(--u) * 0.5) calc(var(--u) * 0.7) rgba(20, 30, 45, 0.6),
    inset 0 calc(var(--u) * 0.25) 0 rgba(255, 245, 205, 0.7),
    inset 0 calc(var(--u) * -0.3) calc(var(--u) * 0.3) rgba(80, 50, 10, 0.6);
}

.toggle__lever {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(var(--u) * 8.4);
  height: calc(var(--u) * 3.3);
  margin: calc(var(--u) * -1.65) 0 0 calc(var(--u) * -1.65);
  transform-origin: calc(var(--u) * 1.65) 50%;
  border-radius: calc(var(--u) * 1.65);
  background: linear-gradient(180deg, #f6e2a6, #cfa450 45%, #8a6224);
  box-shadow:
    0 calc(var(--u) * 0.6) calc(var(--u) * 0.7) rgba(0, 0, 0, 0.6),
    inset 0 calc(var(--u) * 0.2) 0 rgba(255, 250, 220, 0.7);
  transform: rotate(-16deg);
  transition: transform 110ms cubic-bezier(0.3, 1.6, 0.6, 1);
}

.toggle__lever::after {
  content: '';
  position: absolute;
  right: calc(var(--u) * -0.6);
  top: 50%;
  width: calc(var(--u) * 4.4);
  height: calc(var(--u) * 4.4);
  margin-top: calc(var(--u) * -2.2);
  border-radius: 50%;
  background: radial-gradient(circle at 36% 30%, #fff3c8, #d9b05c 45%, #7d5820);
  box-shadow: 0 calc(var(--u) * 0.4) calc(var(--u) * 0.5) rgba(0, 0, 0, 0.5);
}

.toggle[aria-checked='false'] .toggle__lever {
  transform: rotate(-164deg);
}

.volume {
  display: grid;
  justify-items: center;
  width: 100%;
}

/* The slider's touch area runs up underneath its printed name. */
.volume .legend {
  margin-bottom: calc(var(--u) * -1.9);
  pointer-events: none;
}

.volume__slider {
  -webkit-appearance: none;
  appearance: none;
  width: calc(var(--u) * 36);
  max-width: 100%;
  height: max(44px, calc(var(--u) * 11.6));
  margin: 0;
  background: none;
  cursor: pointer;
  touch-action: pan-y;
}

.volume__slider::-webkit-slider-runnable-track {
  height: calc(var(--u) * 2);
  border-radius: calc(var(--u) * 1);
  background: linear-gradient(#120d09, #2b2018);
  box-shadow:
    inset 0 calc(var(--u) * 0.4) calc(var(--u) * 0.5) #000,
    0 calc(var(--u) * 0.22) 0 rgba(255, 255, 255, 0.5),
    0 calc(var(--u) * -0.14) 0 rgba(43, 66, 94, 0.5);
}

.volume__slider::-moz-range-track {
  height: calc(var(--u) * 2);
  border-radius: calc(var(--u) * 1);
  background: linear-gradient(#120d09, #2b2018);
  box-shadow:
    inset 0 calc(var(--u) * 0.4) calc(var(--u) * 0.5) #000,
    0 calc(var(--u) * 0.22) 0 rgba(255, 255, 255, 0.5);
}

.volume__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: calc(var(--u) * 4.4);
  height: calc(var(--u) * 7.4);
  margin-top: calc(var(--u) * -2.7);
  border: 0;
  border-radius: calc(var(--u) * 1);
  background:
    repeating-linear-gradient(90deg, rgba(90, 60, 20, 0.4) 0 calc(var(--u) * 0.2), transparent calc(var(--u) * 0.2) calc(var(--u) * 0.75)),
    linear-gradient(180deg, var(--cream-hi), var(--cream) 50%, var(--cream-lo));
  box-shadow:
    0 calc(var(--u) * 0.6) 0 var(--cream-edge),
    0 calc(var(--u) * 0.9) calc(var(--u) * 0.8) rgba(20, 30, 45, 0.6);
}

.volume__slider::-moz-range-thumb {
  width: calc(var(--u) * 4.4);
  height: calc(var(--u) * 7.4);
  border: 0;
  border-radius: calc(var(--u) * 1);
  background:
    repeating-linear-gradient(90deg, rgba(90, 60, 20, 0.4) 0 calc(var(--u) * 0.2), transparent calc(var(--u) * 0.2) calc(var(--u) * 0.75)),
    linear-gradient(180deg, var(--cream-hi), var(--cream) 50%, var(--cream-lo));
  box-shadow:
    0 calc(var(--u) * 0.6) 0 var(--cream-edge),
    0 calc(var(--u) * 0.9) calc(var(--u) * 0.8) rgba(20, 30, 45, 0.6);
}

/* Phones and tablets: the device's buttons are the volume, so no slider. */
.volume[data-fixed] .legend {
  margin: calc(var(--u) * 1.2) 0 0;
  text-align: center;
}

.volume[data-fixed] .legend::after {
  content: 'use phone buttons';
  display: block;
  margin-top: calc(var(--u) * 0.9);
  letter-spacing: 0.04em;
  text-transform: none;
  font-weight: 600;
}

/* ---- transport keys ----------------------------------------------------------- */

.keys {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1.24fr 1fr 1fr;
  gap: calc(var(--u) * 1.5);
  padding: calc(var(--u) * 3.4) calc(var(--u) * 2.6) calc(var(--u) * 4.6);
  border-radius: calc(var(--u) * 4.6);
  background: linear-gradient(180deg, #120c08 0%, #2a1e15 60%, #1b130d 100%);
  box-shadow:
    inset 0 calc(var(--u) * 1.2) calc(var(--u) * 1.8) rgba(0, 0, 0, 0.9),
    inset 0 0 0 calc(var(--u) * 0.3) rgba(0, 0, 0, 0.5),
    0 calc(var(--u) * 0.3) 0 rgba(255, 255, 255, 0.5),
    0 calc(var(--u) * -0.2) 0 rgba(43, 66, 94, 0.6),
    0 0 0 calc(var(--u) * 0.9) rgba(134, 163, 189, 0.55);
  min-height: 0;
}

/* The hinge rod the keys pivot on. */
.keys::after {
  content: '';
  position: absolute;
  left: calc(var(--u) * 3.4);
  right: calc(var(--u) * 3.4);
  bottom: calc(var(--u) * 1.5);
  height: calc(var(--u) * 1.5);
  border-radius: calc(var(--u) * 0.75);
  background:
    repeating-linear-gradient(90deg, transparent 0 calc(var(--u) * 19), rgba(198, 154, 76, 0.9) calc(var(--u) * 19) calc(var(--u) * 21)),
    linear-gradient(180deg, #8d8377, #4a4239 55%, #2c2620);
  box-shadow: 0 calc(var(--u) * 0.3) calc(var(--u) * 0.4) rgba(0, 0, 0, 0.7);
  pointer-events: none;
}

.key {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: calc(var(--u) * 1);
  padding: 0;
  border: 0;
  border-radius: calc(var(--u) * 2.4);
  color: var(--key-ink);
  background:
    url('../assets/wear-stain.svg') var(--stain-x, 20%) var(--stain-y, 30%) / calc(var(--u) * 34) auto,
    linear-gradient(180deg, var(--cream-hi) 0%, var(--cream) 48%, var(--cream-lo) 100%);
  box-shadow:
    0 calc(var(--u) * 1.9) 0 var(--cream-edge),
    0 calc(var(--u) * 2.5) calc(var(--u) * 1.2) rgba(0, 0, 0, 0.75),
    inset 0 calc(var(--u) * 0.45) calc(var(--u) * 0.35) rgba(255, 255, 255, 0.85),
    inset 0 calc(var(--u) * -0.5) calc(var(--u) * 0.7) rgba(125, 95, 50, 0.4),
    inset 0 0 0 calc(var(--u) * 0.2) rgba(125, 95, 50, 0.28);
  transform: translateY(calc(var(--u) * -1.5));
  transition:
    transform 60ms ease-out,
    box-shadow 60ms ease-out;
  touch-action: none;
  -webkit-touch-callout: none;
}

.key--rew {
  --stain-x: 70%;
  --stain-y: 10%;
}

.key--pause {
  --stain-x: 45%;
  --stain-y: 80%;
}

.key--ff {
  --stain-x: 95%;
  --stain-y: 55%;
}

.key--play {
  --cream-hi: #b7c6ab;
  --cream: var(--sage);
  --cream-lo: var(--sage-lo);
  --cream-edge: #556650;
  --stain-x: 5%;
  --stain-y: 65%;
}

.key svg {
  height: calc(var(--u) * 6.6);
  width: auto;
  fill: currentColor;
  display: block;
}

.key__label {
  font-family: var(--font-label);
  font-weight: 700;
  font-size: max(10px, calc(var(--u) * 2.5));
  line-height: 1;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* Pressed: by a finger, held for winding, or PLAY latched down while playing. */
.key:active,
.key.is-down {
  transform: translateY(calc(var(--u) * 0.1));
  box-shadow:
    0 calc(var(--u) * 0.3) 0 var(--cream-edge),
    0 calc(var(--u) * 0.6) calc(var(--u) * 0.5) rgba(0, 0, 0, 0.75),
    inset 0 calc(var(--u) * 0.5) calc(var(--u) * 0.7) rgba(90, 65, 30, 0.35),
    inset 0 0 0 calc(var(--u) * 0.2) rgba(125, 95, 50, 0.28);
}

/* ---- focus: always visible, never colour alone -------------------------------- */

.key:focus-visible {
  outline: max(3px, calc(var(--u) * 0.8)) solid var(--focus-on-dark);
  outline-offset: calc(var(--u) * 0.5);
}

.flip:focus-visible,
.toggle:focus-visible,
.volume__slider:focus-visible {
  outline: max(3px, calc(var(--u) * 0.8)) solid var(--ink);
  outline-offset: calc(var(--u) * 0.6);
}

@media (prefers-reduced-motion: reduce) {
  .key,
  .flip,
  .toggle__lever {
    transition: none;
  }
}