My developed plugin’s css is overriding by theme’s style.css

I have built a chatbot. But its text field has color background: #f4f7f9; which is getting override by Astra’s selectors and giving it background: #fafafa;. I am using the Astra theme and by looking at the inspect element its

input[type="email"],
input[type="number"],
input[type="password"],
input[type="reset"],
input[type="search"],
input[type="tel"],
input[type="text"],
input[type="url"],
select,
textarea {
    color: #666;
    padding: 0.75em;
    height: auto;
    border-width: 1px;
    border-style: solid;
    border-color: #eaeaea;
    border-radius: 2px;
    background: #fafafa;
    box-shadow: none;
    box-sizing: border-box;
    transition: all 0.2s linear;
}

Is Overriding My

.Chat_TextField {
  background: #f4f7f9;
  width: 85%;
  /* margin-bottom: 15px; */
  border-top: 0px solid #ccc;
  position: relative;
  padding-top: 10px;
  padding-right: 10px;
  padding-bottom: 10px;
  padding-left: 15px;
  border: none !important;
  resize: none;
  outline: none;
  /* border:1px solid #ccc; */
  color: #888;
  /* border-top:1px solid #ccc; */
  border-bottom-right-radius: 5px;
  border-bottom-left-radius: 5px;
  overflow: hidden;
}

However, all properties are not getting overridden but some of them ARE.

Points To Be Noted:

My Bot CSS file FD_Chatbot_Style.css is getting loaded after the style.css. So it should give more precedence to my CSS file instead of the style.css.

If I add !important tag to background: #f4f7f9; in my FD_Chatbot_Style.css. It not get overriden.

If I delete the Style.css through the inspect element everything works fine then.

I have given 999 priority when adding my CSS file with wp_enque. But loading, in the end, does not help.

PS: I AM STUCK ON THIS FOR A DAY. TON OF REASERCHING DID NOT HELP.