<?xml version="1.0"?>
<layout xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_layout.xsd">
    <update handle="empty"/>
    <referenceContainer name="page.wrapper">

        <container name="my-custom-wrapper" htmlClass="my-custom-wrapper" htmlTag="div">

        <container name="header.container" as="header_container" label="Page Header Container" htmlTag="header" htmlClass="page-header" before="main.content"/>
        <container name="page.top" as="page_top" label="After Page Header" after="header.container"/>
        <container name="footer-container" as="footer" before="before.body.end" label="Page Footer Container" htmlTag="footer" htmlClass="page-footer" />

        </container>

    </referenceContainer>
</layout>

<div class="page-wrapper">
  <div class="my-custom-wrapper">
     ... all other containers ....
  </div>
</div>

<referenceContainer name="content">
            <container name="container-name" htmlTag="div" htmlClass="container-class">
   </container>
</referenceContainer>