#disease-ai-chat-bubble {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #4CAF50;
    color: white;
    padding: 10px 15px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 1000;
}
#disease-ai-chat-popup {
    display: none;
    position: fixed;
    bottom: 70px;
    right: 20px;
    width: 300px;
    max-height: 400px;
    background: white;
    border: 1px solid #ccc;
    box-shadow: 0 0 10px rgba(0,0,0,0.3);
    border-radius: 10px;
    z-index: 1001;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
#chat-header {
    background: #4CAF50;
    color: white;
    padding: 10px;
    font-weight: bold;
}
#chat-messages {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
}
#chat-input {
    width: calc(100% - 20px);
    margin: 10px;
    height: 50px;
}
#send-btn {
    background: #4CAF50;
    color: white;
    border: none;
    padding: 10px;
    width: 100%;
    cursor: pointer;
}
.msg.user { text-align: right; color: blue; margin: 5px 0; }
.msg.ai { text-align: left; color: green; margin: 5px 0; }
#letstalk {
    border-top: 1px solid #eee;
    padding: 10px;
    background: #fafafa;
}