.bw-sound-toggle, .bw-sound-volume {
  --bw-sound-surface: rgb(8 26 28 / .9);
  --bw-sound-ink: #f8f8f4;
  --bw-sound-rule: rgb(248 248 244 / .24);
  --bw-sound-shadow: rgb(0 0 0 / .22);
  --bw-sound-track: #425859;
  --bw-sound-fill: #84cfcb;
  --bw-sound-thumb: #f8f8f4;
  --bw-sound-tooltip: #102022;
  color-scheme: dark;
}
/* Follow the surface behind each control, including the bright Approach header.
   Scope reader overrides to direct children so enlarged viewers stay dark. */
.site-nav--dark:not(.is-open) :is(.bw-sound-toggle, .bw-sound-volume),
.cw-overlay[data-cw-case-study="explorations"] > :is(.bw-sound-toggle, .bw-sound-volume) {
  --bw-sound-surface: rgb(248 248 244 / .95);
  --bw-sound-ink: #182b2b;
  --bw-sound-rule: rgb(35 75 70 / .24);
  --bw-sound-shadow: rgb(18 43 40 / .12);
  --bw-sound-track: #c3d4cf;
  --bw-sound-fill: #2b716d;
  --bw-sound-thumb: #315f5b;
  --bw-sound-tooltip: #f8f8f4;
  color-scheme: light;
}
.bw-sound-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex: none;
  min-width: 44px;
  min-height: 44px;
  padding: 8px;
  border: 0;
  border-radius: 24px;
  background: transparent;
  color: inherit;
  font: 500 12px/1.2 Manrope, sans-serif;
  white-space: nowrap;
  cursor: pointer;
  opacity: .75;
  transition: opacity .2s ease, background-color .2s ease;
}
.bw-sound-toggle:hover, .bw-sound-toggle:focus-visible { opacity: 1; }
.bw-sound-toggle:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }
.bw-sound-toggle svg { width: 18px; height: 18px; flex: none; }
.bw-sound-toggle__waves, .bw-sound-toggle[data-sound-state="on"] .bw-sound-toggle__mute { display: none; }
.bw-sound-toggle[data-sound-state="on"] .bw-sound-toggle__waves { display: block; }
.bw-sound-volume {
  position: fixed;
  z-index: 140;
  display: flex;
  align-items: center;
  gap: 10px;
  width: 160px;
  height: 44px;
  padding: 0 12px;
  border: 1px solid var(--bw-sound-rule);
  border-radius: 22px;
  background: var(--bw-sound-surface);
  color: var(--bw-sound-ink);
  box-shadow: 0 8px 28px var(--bw-sound-shadow);
  backdrop-filter: blur(16px) saturate(1.15);
  -webkit-backdrop-filter: blur(16px) saturate(1.15);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(5px) scale(.98);
  transform-origin: right center;
  transition: opacity .16s ease, visibility 0s linear .16s, transform .2s cubic-bezier(.2,.8,.2,1);
}
.bw-sound-volume.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0) scale(1);
  transition-delay: 0s;
}
.bw-sound-volume__range {
  width: 100%;
  min-width: 0;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  height: 24px;
  padding: 0;
  border: 0;
  background: transparent;
  opacity: 1;
  --volume-fill: 47.368%;
  cursor: pointer;
}
/* Explicit tracks keep the selected level visible in Safari, including while muted. */
.bw-sound-volume__range::-webkit-slider-runnable-track {
  height: 4px;
  border: 0;
  border-radius: 2px;
  background: linear-gradient(to right, var(--bw-sound-fill) 0%, var(--bw-sound-fill) var(--volume-fill), var(--bw-sound-track) var(--volume-fill), var(--bw-sound-track) 100%);
}
.bw-sound-volume__range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  margin-top: -5px;
  border: 0;
  border-radius: 50%;
  background: var(--bw-sound-thumb);
  box-shadow: 0 0 0 1px rgb(8 26 28 / .2);
}
.bw-sound-volume__range::-moz-range-track {
  height: 4px;
  border: 0;
  border-radius: 2px;
  background: linear-gradient(to right, var(--bw-sound-fill) 0%, var(--bw-sound-fill) var(--volume-fill), var(--bw-sound-track) var(--volume-fill), var(--bw-sound-track) 100%);
}
.bw-sound-volume__range::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 0;
  border-radius: 50%;
  background: var(--bw-sound-thumb);
  box-shadow: 0 0 0 1px rgb(8 26 28 / .2);
}
.bw-sound-volume__range:focus-visible {
  outline: 2px solid var(--bw-sound-fill);
  outline-offset: 4px;
  border-radius: 8px;
}
.bw-sound-volume__value {
  flex: 0 0 34px;
  color: var(--bw-sound-ink);
  font: 600 10px/1 Manrope, sans-serif;
  letter-spacing: .02em;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.site-nav .site-nav__links { gap: clamp(20px, 2.5vw, 48px); }
.cw-overlay > .bw-sound-toggle, .cw-image-viewer > .bw-sound-toggle, .bw-legal-overlay > .bw-sound-toggle {
  position: absolute;
  left: max(20px, env(safe-area-inset-left));
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: 125;
  background: transparent;
  color: #f8f8f4;
  opacity: 1;
  box-shadow: none;
}
/* Match the close control: light ink on dark readers, dark ink on Explorations. */
.cw-overlay[data-cw-case-study="explorations"] > .bw-sound-toggle { color: #182020; }
.cw-overlay > .bw-sound-toggle svg,
.cw-image-viewer > .bw-sound-toggle svg,
.bw-legal-overlay > .bw-sound-toggle svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.8;
}
.cw-overlay.cw-has-image-viewer > .bw-sound-toggle,
.cw-overlay.cw-has-image-viewer > .bw-sound-volume { display: none; }
.cw-image-viewer > .bw-sound-toggle { background: transparent; color: #f8f8f4; }
@media (max-width: 980px) {
  html.hero-handoff-enabled .site-nav { gap: 8px; }
  html.hero-handoff-enabled .site-nav > .bw-sound-toggle {
    position: relative;
    margin-left: auto;
    z-index: 4;
    color: inherit;
    background: transparent;
  }
  html.hero-handoff-enabled .site-nav .site-nav__toggle { margin-left: 0; flex: none; }
  .site-nav .bw-sound-toggle::after { left: auto; right: 0; transform: none; }
  .cw-overlay > .bw-sound-toggle, .cw-image-viewer > .bw-sound-toggle, .bw-legal-overlay > .bw-sound-toggle {
    left: max(12px, env(safe-area-inset-left));
    bottom: max(12px, env(safe-area-inset-bottom));
  }
}
@media (max-width: 420px) {
  .site-nav .site-nav__identity { gap: 12px; }
  .site-nav .site-nav__locale { padding-left: 12px; }
}
@media (max-width: 360px) {
  html.hero-handoff-enabled .site-nav { gap: 4px; padding-inline: 16px; }
  .site-nav .site-nav__identity { gap: 8px; }
  .site-nav .site-nav__identity .site-nav__brand,
  .site-nav .site-nav__identity .site-nav__wordmark { height: 10px; min-height: 10px; }
}
.bw-sound-toggle__label { display: none; }
.bw-sound-toggle::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 50%;
  top: calc(100% + 6px);
  transform: translateX(-50%);
  padding: 7px 10px;
  border-radius: 5px;
  background: var(--bw-sound-tooltip);
  color: var(--bw-sound-ink);
  border: 1px solid var(--bw-sound-rule);
  box-shadow: 0 4px 16px var(--bw-sound-shadow);
  font: 500 12px/1.3 Manrope, sans-serif;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity .15s ease;
  z-index: 130;
}
.bw-sound-toggle:hover::after, .bw-sound-toggle:focus-visible::after { opacity: 1; visibility: visible; }
.cw-overlay > .bw-sound-toggle::after, .cw-image-viewer > .bw-sound-toggle::after,
.bw-legal-overlay > .bw-sound-toggle::after {
  top: auto; bottom: calc(100% + 6px); left: 0; transform: none;
}
.bw-sound-toggle[data-sound-state="on"] .bw-sound-toggle__waves path {
  animation: bw-sound-wave 1.6s ease-out infinite;
}
.bw-sound-toggle[data-sound-state="on"] .bw-sound-toggle__waves path + path { animation-delay: .3s; }
@keyframes bw-sound-wave {
  0%, 100% { opacity: .25; transform: translateX(-.4px); }
  45% { opacity: 1; }
  80% { opacity: .35; transform: translateX(.7px); }
}
@media (prefers-reduced-motion: reduce) {
  .bw-sound-toggle, .bw-sound-toggle::after, .bw-sound-volume { transition: none; }
  .bw-sound-toggle[data-sound-state="on"] .bw-sound-toggle__waves path { animation: none; }
}

@media (max-width: 480px) {
  .bw-sound-volume { width: 148px; }
}

/* Keep reader and image-viewer sound controls beside their close buttons. */
.cw-overlay > .bw-sound-toggle,
.cw-image-viewer > .bw-sound-toggle {
  position: fixed;
  left: auto;
  bottom: auto;
  top: 20px;
  right: calc(clamp(18px, 2.5vw, 38px) + 52px);
  width: 44px;
  height: 44px;
}
.cw-image-viewer > .bw-sound-toggle {
  top: 22px;
  right: calc(clamp(18px, 2.5vw, 38px) + 56px);
}
.cw-overlay > .bw-sound-toggle::after,
.cw-image-viewer > .bw-sound-toggle::after {
  top: calc(100% + 6px);
  bottom: auto;
  left: auto;
  right: 0;
}
.cw-overlay .cw-index__track { max-width: calc(100vw - 240px); }
@media (max-width: 700px) {
  .cw-image-viewer > .bw-sound-toggle { top: 14px; right: 66px; }
}
@media (max-width: 680px) {
  .cw-overlay > .bw-sound-toggle { top: 10px; right: 60px; }
  .cw-overlay .cw-index__track {
    width: calc(100vw - 124px);
    max-width: none;
    margin-left: 12px;
    margin-right: 0;
  }
}
@media (orientation: landscape) and (max-height: 540px) and (max-width: 980px) {
  .cw-overlay > .bw-sound-toggle {
    top: 10px;
    right: calc(max(12px, env(safe-area-inset-right)) + 52px);
  }
  .cw-image-viewer > .bw-sound-toggle { top: 12px; right: 66px; }
  .cw-overlay .cw-index__track {
    width: min(760px, calc(100vw - 240px));
    margin-inline: auto;
  }
}