cchat-gtk/internal/ui/style.css

headerbar { padding: 0; }

.services button { border-radius: 0; }

.message-content, .message-content text {
	background: none;
	box-shadow: none;
	border: none;
}

popover > box {
	margin: 6px;
}

.command-buffer, .command-input {
	padding: 8px 12px;
}