static/styles.css

# static/styles.css
/* Google Notebook LM style CSS */
.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.stChatMessage {
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

.stTextArea {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
}

.stButton>button {
    border-radius: 20px;
}