#nexacore-chat {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 300px;
    max-height: 400px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 9999;
}

#chat-header {
    background: #0073aa;
    color: #fff;
    padding: 10px;
    font-weight: bold;
    text-align: center;
}

#chat-messages {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
    border-bottom: 1px solid #ddd;
}

#chat-input {
    border: none;
    padding: 10px;
    width: calc(100% - 60px);
    outline: none;
}

#chat-send {
    padding: 10px;
    width: 50px;
    background: #0073aa;
    color: #fff;
    border: none;
    cursor: pointer;
}