/* chat area */
	.chat-box {
	  height: calc(100vh - 60px);
	  overflow-y:auto;
	  padding:10px;
	  padding-bottom: 90px; /* biar tidak ketutup input */
	}

	/* bubble */
	.bubble {
	  padding:10px 14px;
	  border-radius:18px;
	  max-width:75%;
	  margin-bottom:10px;
	  font-size:14px;
	  word-wrap: break-word;
	}

	.bot {
	  background:#fff;
	}

	.user {
	  background:#dcf8c6;
	  margin-left:auto;
	}

	/* input */
	.input-area {
	  position:fixed;
	  bottom:0;
	  width:100%;
	  background:#fff;
	  padding:8px;
	  display:flex;
	  gap:5px;
	  border-top:1px solid #ddd;
	}
	
	.is-invalid {
	  border: 2px solid #dc3545 !important;
	  background-color: #fff5f5;
	}