body {
            -webkit-user-select: none;
            -moz-user-select: none;
            -ms-user-select: none;
            user-select: none;
            -webkit-touch-callout: none;
        }
        input, textarea {
            -webkit-user-select: text;
            -moz-user-select: text;
            user-select: text;
        }

        /* <code>内は選択・コピーを許可（pre > code も対象） */
        code,
        code * {
            -webkit-user-select: text;
            -moz-user-select: text;
            -ms-user-select: text;
            user-select: text;
            -webkit-touch-callout: default;
        }

        img {
            -webkit-user-drag: none;
            user-drag: none;
            pointer-events: none;
        }