/* 教材与场景单词共用的朗读设置。 */
.tts-settings { container: tts-settings / inline-size; min-width: 0; margin: 0 0 18px; padding: 14px 18px; border: 1px solid var(--w-line, #c3ddeb); border-radius: 16px; background: #fff; }
.tts-settings legend { padding: 0 7px; font-size: 17px; font-weight: 800; }
.tts-controls-grid { display: grid; grid-template-columns: minmax(0, 2fr) repeat(2, minmax(130px, 1fr)) auto; gap: 18px; align-items: end; }
.tts-controls-grid label { display: block; font-size: 15px; font-weight: 700; }
.tts-voice-control select { margin-top: 6px; min-height: 46px; padding: 8px 10px; font-size: 15px; text-overflow: ellipsis; }
.tts-control-slider label { display: flex; justify-content: space-between; gap: 8px; }
.tts-control-slider output { color: #365f77; font-variant-numeric: tabular-nums; }
.tts-control-slider input[type="range"] { display: block; min-height: 46px; padding: 0; border: 0; margin: 6px 0 0; background: transparent; accent-color: #487e9c; cursor: pointer; }
.tts-controls-grid button { min-height: 46px; }
.tts-controls-note { margin: 10px 0 0; font-size: 13px; color: var(--muted); line-height: 1.7; }
.tts-sequence-settings { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(0, 1.3fr); gap: 18px; align-items: center; margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--w-line, #c3ddeb); }
.tts-sequence-settings label { font-size: 16px; font-weight: 700; }
.tts-sequence-status { margin: 0; padding: 12px 16px; border-radius: 12px; background: #eff8f0; color: #376b4e; font-size: 16px; line-height: 1.7; }

/* 折叠容器：模块详情/语法页把朗读设置收成一行，要点开才展开。 */
.tts-details { margin: 0 0 20px; }
.tts-details summary { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 8px 18px; border: 1px solid var(--w-line, #c3ddeb); border-radius: 999px; background: #fff; color: #365f77; font-size: 15px; font-weight: 700; cursor: pointer; list-style: none; transition: border-color .14s ease, background .14s ease; }
.tts-details summary::-webkit-details-marker { display: none; }
.tts-details summary::marker { content: ""; }
.tts-details summary::after { content: "▸"; font-size: 12px; }
.tts-details summary:hover { border-color: #487e9c; background: #f2f8fb; }
.tts-details[open] summary::after { content: "▾"; }
.tts-details[open] summary { margin-bottom: 12px; }
.tts-details .tts-settings { margin-bottom: 0; }

@container tts-settings (max-width: 700px) {
  .tts-controls-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 18px; }
  .tts-sequence-settings { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 18px; }
  .tts-sequence-status { grid-column: 1 / -1; }
  .tts-voice-control { grid-column: 1 / -1; }
  .tts-controls-grid button { justify-self: start; }
}
@media print { .tts-settings { display: none !important; } }