.mandarin-voice-settings-trigger {
  position: fixed;
  top: 158px;
  right: 18px;
  z-index: 45;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line, #cbd1cc);
  border-radius: 50%;
  background: var(--surface, var(--paper-light, #fff));
  color: var(--ink, #18211b);
  box-shadow: 0 10px 28px rgb(20 35 25 / 14%);
  padding: 0;
  font: inherit;
  font-size: 1rem;
  cursor: pointer;
}

.mandarin-voice-settings-trigger:hover,
.mandarin-voice-settings-trigger:focus-visible,
.mandarin-voice-settings-trigger[aria-expanded="true"] {
  border-color: var(--ink, #18211b);
}

.mandarin-speech-settings {
  position: fixed;
  top: 212px;
  right: 18px;
  z-index: 46;
  width: min(330px, calc(100% - 32px));
  margin: 0;
  padding: 16px;
  display: grid;
  gap: 13px;
  border: 1px solid var(--line, #cbd1cc);
  border-radius: 14px;
  background: var(--surface, var(--paper-light, #fff));
  color: var(--ink, #18211b);
  box-shadow: 0 18px 48px rgb(20 35 25 / 20%);
}

.mandarin-speech-settings[hidden] { display: none; }
.mandarin-voice-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.mandarin-voice-heading strong { font-size: .86rem; }
.mandarin-voice-close { display: grid; width: 30px; height: 30px; place-items: center; border: 0; border-radius: 50%; background: transparent; color: inherit; padding: 0; font-size: 1.2rem; cursor: pointer; }
.mandarin-voice-close:hover,.mandarin-voice-close:focus-visible { background: color-mix(in srgb, currentColor 10%, transparent); }
.mandarin-voice-field,
.mandarin-rate-field { display: grid; gap: 7px; font-size: .78rem; font-weight: 800; }
.mandarin-rate-field > span { display: flex; justify-content: space-between; gap: 12px; }
.mandarin-rate-note { margin-top: -4px; color: var(--ink-soft, #5d6a62); font-size: .7rem; line-height: 1.35; }
.mandarin-speech-settings select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line, #cbd1cc);
  border-radius: 9px;
  background: var(--surface, var(--paper-light, #fff));
  color: inherit;
  padding: 0 10px;
  font: inherit;
}
.mandarin-speech-settings input[type="range"] { width: 100%; accent-color: var(--mint-strong, #315f42); }
.mandarin-voice-tests { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.mandarin-voice-test {
  min-height: 42px;
  border: 1px solid var(--mint-strong, #315f42);
  border-radius: 9px;
  background: var(--mint-strong, #315f42);
  color: white;
  padding: 0 18px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.mandarin-voice-test:disabled { cursor: not-allowed; opacity: .5; }
:root[data-theme="dark"] .mandarin-voice-test { color: #121713; }

:root[data-embedded="true"] .mandarin-voice-settings-trigger { top: 16px; }
:root[data-embedded="true"] .mandarin-speech-settings { top: 70px; }

@media (max-width: 680px) {
  .mandarin-voice-settings-trigger { top: 150px; right: 12px; }
  .mandarin-speech-settings { top: 202px; right: 12px; }
  :root[data-embedded="true"] .mandarin-voice-settings-trigger { top: 12px; }
  :root[data-embedded="true"] .mandarin-speech-settings { top: 64px; }
  .mandarin-voice-tests { grid-template-columns: 1fr; }
  .mandarin-voice-test { width: 100%; }
}

/* Universal button-border contract: every enabled button renders a visible 1px border. */
button:not(:disabled) {
  border-style: solid !important;
  border-width: 1px !important;
}