#ocb-chat {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 320px;
    height: 400px;
    border: 1px solid #ccc;
    border-radius: 12px;
    background: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    font-family: Tahoma, sans-serif;
    z-index: 9999;
    overflow: hidden;
}

#ocb-header {
    background: #4a90e2;
    color: white;
    padding: 12px;
    text-align: center;
    font-weight: bold;
}

#ocb-messages {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
    font-size: 14px;
    line-height: 1.5;
    background: #f9f9f9;
}

#ocb-input-area {
    display: flex;
    padding: 10px;
    border-top: 1px solid #eee;
    background: white;
}

#ocb-prompt {
    flex: 1;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 6px;
    outline: none;
}

#ocb-send {
    margin-left: 5px;
    padding: 0 12px;
    background: #4a90e2;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

#ocb-send:disabled {
    background: #ccc;
}

.ocb-user-msg {
    text-align: left;
    background: #e3f2fd;
    padding: 8px 10px;
    border-radius: 10px;
    margin: 5px 10px 5px 40px;
    word-wrap: break-word;
}

.ocb-bot-msg {
    text-align: right;
    background: #f0f0f0;
    padding: 8px 10px;
    border-radius: 10px;
    margin: 5px 40px 5px 10px;
    word-wrap: break-word;
}

.ocb-error {
    color: #d32f2f;
    font-size: 13px;
    margin: 5px 10px;
    background: #ffebee;
    padding: 8px;
    border-radius: 6px;
}