/* 文字转语音 /css/tools/text-to-speech.css
   依赖：home.css（--c-* 设计令牌）、tool-detail.css、tools/calc-common.css */

.tts-ta {
    width: 100%;
    min-height: 200px;
    padding: 12px 14px;
    border: 1px solid var(--c-border);
    border-radius: 12px;
    background: var(--c-bg-card, #fff);
    color: var(--c-text);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.7;
    resize: vertical;
    outline: none;
    box-sizing: border-box;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.tts-ta:focus {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-soft);
}

.tts-count {
    float: right;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--c-text-muted);
}

/* 滑块 */
.tts-slider {
    display: flex;
    align-items: center;
    gap: 10px;
}
.tts-range {
    flex: 1 1 auto;
    min-width: 0;
    height: 4px;
    border-radius: 99px;
    background: var(--c-border);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    accent-color: var(--c-primary);
    cursor: pointer;
}
.tts-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--c-primary);
    border: 2px solid var(--c-bg-card, #fff);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}
.tts-range::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--c-primary);
    border: 2px solid var(--c-bg-card, #fff);
    cursor: pointer;
}
.tts-range-val {
    flex: none;
    width: 44px;
    text-align: right;
    font-size: 12.5px;
    font-weight: 800;
    color: var(--c-primary);
    font-family: 'JetBrains Mono', Consolas, monospace;
}

/* 播放控制按钮 */
.tts-ctrl {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 8px;
}
.tts-ctrl .btn { margin: 0; padding: 10px 8px; font-size: 13.5px; }
.tts-ctrl .btn:first-child { grid-column: 1 / -1; }
.tts-ctrl .btn:disabled { opacity: .45; cursor: not-allowed; }

/* 状态灯 */
.tts-state {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 12px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 700;
    background: var(--c-surface-soft);
    border: 1px solid var(--c-border);
    color: var(--c-text-sub);
}
.tts-state.is-playing { background: var(--c-primary-soft); border-color: var(--c-primary); color: var(--c-primary); }
.tts-state.is-paused { background: rgba(224, 68, 124, .1); border-color: rgba(224, 68, 124, .35); color: #e0447c; }
.tts-state.is-bad { background: rgba(224, 68, 124, .1); border-color: rgba(224, 68, 124, .35); color: #e0447c; }

.tts-wave {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 16px;
    margin: 0 2px;
}
.tts-wave i {
    display: block;
    width: 3px;
    height: 6px;
    border-radius: 99px;
    background: currentColor;
    opacity: .85;
}
.tts-wave.on i { animation: ttsBar .9s ease-in-out infinite; }
.tts-wave i:nth-child(2) { animation-delay: .15s; }
.tts-wave i:nth-child(3) { animation-delay: .3s; }
.tts-wave i:nth-child(4) { animation-delay: .45s; }
@keyframes ttsBar {
    0%, 100% { height: 5px; }
    50% { height: 15px; }
}

.tts-voice-tip {
    font-size: 11.5px;
    color: var(--c-text-muted);
    line-height: 1.7;
    margin-top: 6px;
}

.tts-fallback {
    margin-top: 12px;
}

@media (max-width: 620px) {
    .tts-ta { min-height: 160px; }
}