rhymix/modules/editor/skins/textarea/css/textarea.css

.rx_editor_wrapper {
	clear: both;
}

.rx_editor_wrapper .rx_editor_textarea {
	width: 100%;
	min-height: 64px;
	box-sizing: border-box;
	border: 1px solid #b1b1b1;
	background: #fff;
	padding: 8px 10px;
	resize: vertical;
}

.rx_editor_wrapper .rx_editor_textarea.dark {
	border-color: #111;
	background: #333;
}