/* Chapter narration bar — stays above mdBook UI without hiding the whole page */
#hw-os-listen {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.45rem 1rem calc(0.45rem + env(safe-area-inset-bottom));
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid rgba(0, 0, 0, 0.12);
  box-shadow: 0 -4px 14px rgba(0, 0, 0, 0.06);
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
}

#hw-os-listen[hidden] {
  display: none !important;
}

#hw-os-listen .hw-os-listen-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  color: #222;
  white-space: nowrap;
}

#hw-os-listen audio {
  flex: 1 1 220px;
  min-width: min(100%, 280px);
  height: 34px;
}

#hw-os-listen .hw-os-autonext {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: #444;
  user-select: none;
  white-space: nowrap;
}

#hw-os-listen .hw-os-autonext input {
  margin: 0;
}

#hw-os-listen .hw-os-autoplay-blocked {
  flex: 1 1 100%;
  font-size: 0.78rem;
  font-weight: 500;
  color: #8a5a00;
  line-height: 1.25;
}

#hw-os-listen .hw-os-autoplay-blocked[hidden] {
  display: none !important;
}

/* Leave space so the last paragraph isn't hidden behind the audio bar */
body.hw-os-listen-active {
  padding-bottom: 5.25rem;
}

@media (prefers-color-scheme: dark) {
  #hw-os-listen {
    background: rgba(30, 30, 30, 0.97);
    border-top-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 -4px 14px rgba(0, 0, 0, 0.35);
  }
  #hw-os-listen .hw-os-listen-label {
    color: #eee;
  }
  #hw-os-listen .hw-os-autonext {
    color: #bbb;
  }
  #hw-os-listen .hw-os-autoplay-blocked {
    color: #e0b765;
  }
}