.tone-overview {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5em;
    margin: 1em 0;
}

.tone-chip {
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 0.4em 0.7em;
    font-size: 0.9em;
    background: #fafafa;
}

.tone-direction {
    margin-right: 0.3em;
}

.tone-eng {
    color: #888;
    font-size: 0.85em;
}

.tone-mark {
    display: inline-block;
    background: #e8f0fe;
    padding: 0 4px;
    border-radius: 2px;
    margin-left: 0.3em;
    font-weight: 600;
}

.spectrogram-container {
    margin: 1.5em 0;
    display: flex;
    flex-direction: row;
    align-items: stretch;
    gap: 0;
}

.spectrogram-label {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 4px 6px 4px 0;
    font-size: 0.7em;
    color: #888;
    width: 45px;
    text-align: right;
    flex-shrink: 0;
}

#spectrogram {
    border: 1px solid #333;
    border-radius: 4px;
    background: #1a1a2e;
    width: calc(100% - 45px);
    height: 200px;
    display: block;
}

.spectrogram-controls {
    display: flex;
    gap: 1em;
    align-items: center;
    margin-top: 0.5em;
    flex-wrap: wrap;
}

.spectrogram-container {
    flex-wrap: wrap;
}

#spectrogram {
    order: 1;
    width: 100%;
}

.spectrogram-label {
    order: 0;
    width: 100%;
    flex-direction: row;
    justify-content: space-between;
    padding: 0 0 2px 0;
}

.spectrogram-controls {
    order: 2;
    width: 100%;
}

#btn-mic {
    background: #2da44e;
    color: white;
    border: none;
    padding: 6px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
}

#btn-mic:hover {
    background: #1a7f37;
}

#btn-mic.active {
    background: #cf222e;
}

#btn-mic.active:hover {
    background: #a40e26;
}

#btn-clear {
    background: #eee;
    border: 1px solid #ccc;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
}

#btn-clear:hover {
    background: #ddd;
}

#gain-slider {
    width: 100px;
    vertical-align: middle;
}

.pairs-hint {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 1em;
}

.pairs-grid {
    display: flex;
    flex-direction: column;
    gap: 0.4em;
}

.pair-row {
    display: flex;
    align-items: center;
    gap: 0.4em;
}

.pair-base {
    width: 50px;
    color: #888;
    font-size: 0.85em;
    text-align: right;
    flex-shrink: 0;
}

.pair-word {
    background: #f0f4ff;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px 10px;
    cursor: pointer;
    font-size: 0.95em;
    transition: background 0.1s, border-color 0.1s;
}

.pair-word:hover {
    background: #d0e0fd;
    border-color: #3366CC;
}

.pair-word.playing {
    background: #3366CC;
    color: white;
    border-color: #3366CC;
}