(function flexible(window, document) {
    var docel = document.documentelement
    var dpr = window.devicepixelratio || 1
    function setbodyfontsize() {
        if (document.body) {
            document.body.style.fontsize = (12 * dpr) + 'px'
        } else {
            document.addeventlistener('domcontentloaded', setbodyfontsize)
        }
    }
    setbodyfontsize();
    function setremunit() {
        var rem = docel.clientwidth / 10
        docel.style.fontsize = rem + 'px'
    }
    setremunit()
    window.addeventlistener('resize', setremunit)
    window.addeventlistener('pageshow', function (e) {
        if (e.persisted) {
                setremunit()
            }
    })
    if (dpr >= 2) {
        var fakebody = document.createelement('body')
        var testelement = document.createelement('div')
        testelement.style.border = '.5px solid transparent'
        fakebody.appendchild(testelement)
        docel.appendchild(fakebody)
        if (testelement.offsetheight === 1) {
            docel.classlist.add('hairlines')
        }
        docel.removechild(fakebody)
    }
}(window, document))