static/styles.css

.user-message {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin: 10px 0;
  color: white;
}

.user-message .stMarkdown {
  background: linear-gradient(0.9turn, #d46c4e, #ca8d57);
  /* background: linear-gradient(0.9turn, #112c55, #3578cf); */
  border-radius: 15px;
  padding: 10px;
  max-width: 80%;
  word-wrap: break-word;
}

.user-avatar {
  order: 2;
  margin-left: 10px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
}

.assistant-message {
  display: flex;
  align-items: center;
  margin: 10px 0;
  color: black;
}

.assistant-message .stMarkdown {
  background-color: #dadada;
  border-radius: 15px;
  padding: 10px;
  max-width: 80%;
  word-wrap: break-word;
}

.assistant-avatar {
  margin-right: 10px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
}

.logo_area {
  display: flex;
  justify-content: center;
}

.logo_area img {
  margin-top: 50px;
  margin-left: 0px auto;
  width: 149px;
}

/* [data-testid="baseButton-headerNoPadding"], */
[data-testid="stDecoration"],
/* [data-testid="baseButton-header"], */
[data-testid="stHeader"] {
  display: none;
}

[data-testid="stChatInput"],
[data-testid="stChatInputSubmitButton"] {
  border-radius: 15px;
}

[data-baseweb="textarea"] {
  border-color: transparent;
}