css_ui="""
#title {text-align:center; font-size:2.2em; font-weight:700; margin-top:10px;}
.subtitle {text-align:center; color:gray; margin-bottom:25px;}
.gradio-container {background: #f9fafb;}
.chatbox {background:white; border-radius:16px; padding:10px; box-shadow:0 2px 6px rgba(0,0,0,0.1);}
#record-btn {border-radius:50%; width:70px; height:70px; font-size:20px; background:#10a37f; color:white;}
#audio-player {margin-top:10px;}
"""