.wp-block-talkify-tts-button button {
    color: white;
    background: #8ac832;
    border: none;
    padding: 10px;
    font-size: 0.9em;
    border-radius: 3px;
    margin-right: 10px;
}

    .wp-block-talkify-tts-button button:focus ~ .talkify-local-preview-placeholder {
        width: 100px;
        height: 40px;
        border: 2px dashed #8ac832;
        display: inline-block;
        vertical-align: middle;
        background-color: #8ac83238;
    }

    .wp-block-talkify-tts-button button:focus ~ .talkify-bottom-preview-placeholder {
        width: 100%;
        height: 40px;
        border: 2px dashed #8ac832;
        position: fixed;
        bottom: 0;
        left: 0;
        background-color: #8ac83238;
    }