Reflow

The HTML for all 5 pages is included here.

<link href='https://unpkg.com/boxicons@2.1.4/css/boxicons.min.css' rel='stylesheet'>
<div id="nav-menu" role="banner">
    <div class="nav-container">
        <div class="nav-start">
            <a class="logo" href="/">
                <span>Pearson</span>
            </a>
            <nav aria-label="Primary" class="menu">
                <ul class="menu-bar">
                    <li><a class="nav-link" href="#">Home</a></li>
                    <li><a class="nav-link" href="#">About</a></li>
                    <li><a class="nav-link" href="#">Service</a></li>
                    <li><a class="nav-link" href="#">Contact</a></li>
                    <li><a class="nav-link" href="#">Careers</a></li>
                </ul>
            </nav>
        </div>

        <nav aria-label="Breadcrumb" class="nav-end">
            <button id="hamburger" aria-label="hamburger" aria-haspopup="true" aria-expanded="false">
                <i class="bx bx-menu" aria-hidden="true"></i>
            </button>
        </nav>
    </div>
</div>

<div role="main" id="main">
    <h1>Reflow</h1>
    <div class="container">
        <div class="cards card-container">
            <article class="card reorder">
                <h2><a href="#" id="cardtitle2">StatCrunch</a></h2>
                <img src="../common-images/educator.jpg" width="400" height="200" alt="" loading="lazy">
                <p>
                    Put the power of data in students&#8217; hands as they
                    analyze data sets easily from their text and exercises
                </p>
                <a href="#" aria-describedby="cardtitle2">Explore StatCrunch</a>
            </article>

            <article class="card reorder">
                <h2><a href="#" id="cardtitle1">Learning Catalytics</a></h2>
                <img src="../common-images/student-with-raised-hand.jpg" alt="" loading="lazy" width="400" height="200">
                <p>
                    Hear from every student when it matters most as they respond
                    using their own smartphones, tablets or laptops
                </p>
                <a href="#">Explore Learning Catalytics</a>
            </article>

            <article class="card reorder">
                <h2><a href="#" id="cardtitle3">MediaShare</a></h2>
                <img src="../common-images/student-working-at-computer.jpg" alt="" loading="lazy" width="400" height="200">
                <p>
                    Bring course concepts to life and engage students with
                    media-rich activities, created with Pearson or your own
                    content.
                </p>
                <a href="#" aria-describedby="cardtitle3">Explore MediaShare</a>
            </article>
        </div>
        <div class="aside" role="complementary" aria-labelledby="content-title">
            <div class="fld-press-release-report-item">
                <div class="press-release-content-box">
                    <div class="section-heading-content-title" id="content-title">
                        <h2>Latest Annual Report</h2>
                    </div>
                    <div class="section-heading-link-download">
                        <a href="#" class="button-secondary filelink">
                            Annual Report 2022
                        </a>
                    </div>
                </div>
                <div class="press-release-image-box">
                    <div class="press-release-content-image">
                        <img src="../common-images/ir-landing-media.png" width="212" height="278" alt="">
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
<div class="footer" role="contentinfo">
    <nav aria-label="Secondary">
        <ul class="footer-link">
            <li><a href="#">Terms of Use</a></li>
            <li><a href="#">Privacy Statement</a></li>
            <li><a href="#">Patent Notice</a></li>
            <li><a href="#">Accessibility Statement</a></li>
            <li><a href="#">Accessibility Conformance Reports</a></li>
            <li><a href="#">Contact Us</a></li>
        </ul>
    </nav>
    <p>&copy; Copyright 1996-2023 Pearson All rights reserved.</p>
</div>

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Inter", sans-serif;
}

:root {
    --light-grey: #eeeeee;
    --border: 1px solid var(--light-grey);
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    border: none;
    background-color: transparent;
    cursor: pointer;
    color: inherit;
}

.icon {
    padding: 0.5rem;
    background-color: var(--light-grey);
    border-radius: 10px;
}

.logo {
    margin-right: 1.5rem;
}

#nav-menu {
    border-bottom: var(--border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    column-gap: 2rem;
    height: 90px;
    padding: 1.2rem 3rem;
    background-color: #005a70;
}

.menu {
    position: relative;
    background: #005a70;
    color: #fff;
}

.menu-bar li:first-child .dropdown {
    flex-direction: initial;
    min-width: 480px;
}

.menu-bar li:first-child ul:nth-child(1) {
    border-right: var(--border);
}

.menu-bar li:nth-child(n + 2) ul:nth-child(1) {
    border-bottom: var(--border);
}

.menu-bar .dropdown-link-title {
    font-weight: 600;
}

.menu-bar .nav-link {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: -0.6px;
    padding: 0.3rem;
    min-width: 60px;
    margin: 0 0.6rem;
}

.menu-bar .nav-link:hover,
.dropdown-link:hover {
    text-decoration: underline;
}

.nav-start,
.nav-end,
.menu-bar,
.right-container,
.right-container .search {
    display: flex;
    align-items: center;
    z-index: 1000;
}

#hamburger {
    display: none;
    padding: 0.1rem;
    margin-left: 1rem;
    font-size: 1.9rem;
}

@media (max-width: 1100px) {
    #hamburger {
        display: block;
        color: #fff;
    }

    .nav-container {
        padding: 1.2rem;
    }

    .menu {
        display: none;
        position: absolute;
        top: 87px;
        left: 0;
        min-height: 100vh;
        width: 100vw;
    }

    .menu-bar li:first-child ul:nth-child(1) {
        border-right: none;
        border-bottom: var(--border);
    }

    .dropdown {
        display: none;
        min-width: 100%;
        border: none !important;
        border-radius: 5px;
        position: static;
        top: 0;
        left: 0;
        visibility: visible;
        opacity: 1;
        transform: none;
        box-shadow: none;
    }

    .menu.show,
    .dropdown.active {
        display: block;
    }

    .dropdown ul {
        padding-left: 0.3rem;
    }

    .menu-bar {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        row-gap: 1rem;
        padding: 1rem;
    }

    .menu-bar .nav-link {
        display: flex;
        justify-content: space-between;
        width: 100%;
        font-weight: 600;
        font-size: 1.2rem;
        margin: 0;
    }

    .menu-bar li:first-child .dropdown {
        min-width: 100%;
    }

    .menu-bar > li:not(:last-child) {
        padding-bottom: 0.5rem;
        border-bottom: var(--border);
    }
}

.cards {
    flex: 0 1 60%;
    margin-right: 20px;
}

.cards h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color:rgb(0, 102, 204);
}

.cards p {
    font-size: 1rem;
    line-height: 1.5;
}

#main {
    margin: 20px;
    padding: 20px;
}

.card-container {
    display: flex;
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

.cards > * {
    flex: 0 1 20em;
}

.card {
    margin: .75em;
    padding: .75em;
    border-radius: 3px;
    border: 2px #ccc solid;
    border-radius: .6em;
    background-color: white;
    position: relative;
}

img {
    width: 100%;
    height: auto;
}

.reorder {
    display: flex;
    flex-direction: column;
}

.reorder img {
    max-width: 100%;
    order: -1;
}

.cards > * a {
    display: block;
    color: rgb(0, 102, 204);
}

.cards h2 > a {
    text-decoration: none;
}

article:hover {
    box-shadow: 0 0 0 0 0.25rem;
}

.footer {
    position: relative;
    bottom: 0;
    width: 100%;
    text-align: center;
    padding: 20px 0;
    margin: 0;
    background-color: #007fa3;
    color: #fff;
}

.footer ul li {
    list-style: none;
    display: inline-block;
    padding: 0;
    margin: 10px;
}

.footer ul li a {
    font-size: 1.2rem;
    color: #fff;
}

.footer ul li a:hover {
    text-decoration: underline;
}

.aside {
    background-color: #f2f2f2;
    padding: 20px;
    margin: 20px;
    flex: 0 1 30%;
    margin-left: 20px;
    height: fit-content;
}

.container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

@media (max-width: 768px) {
    .cards { flex: 0 1 90%; }
}

.fld-press-release-report-item {
    padding-top: 43px;
    padding-left: 48px;
    padding-bottom: 23px;
    float: left;
}

.press-release-content-box {
    display: block;
    float: left;
    max-width: 100%;;
}

.section-heading-content-title h2 {
    font-size: 1.5rem;
    font-weight: 700;
    font-stretch: normal;
    font-style: normal;
    line-height: 1.42;
    letter-spacing: 0.5px;
    color: #000;
    margin-right: 35px;
}
.section-heading-link-download {
    padding-top: 20px;
    padding-bottom: 20px;
    border-top: 4px solid #ae367e;
    z-index: 10;
}

.section-heading-link-download a {
    position: relative;
    display: inline-block;
    font-size: 1rem;
    font-weight: 700;
    font-stretch: normal;
    font-style: normal;
    line-height: 1.5;
    letter-spacing: 1px;
    color: #000;
    width: 100%;
}

.press-release-image-box {
    display: block;
    float: left;
}

.press-release-content-image {
    position: relative;
    height: 275px;
    width: 212px;
}

.press-release-content-image img {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
}

.press-release-content-image:after {
    position: absolute;
    content: "";
    width: 212px;
    height: 275px;
    background: #fff;
    border-radius: 2px;
    z-index: 0;
    left: 22px;
    margin-top: 22px;
}

span {
    font-size: 24px;
    color: #fff;
}

const hamburgerBtn = document.getElementById("hamburger");
const navMenu = document.querySelector(".menu");

function toggleHamburger() {
    navMenu.classList.toggle("show");
    hamburgerBtn.setAttribute(
        "aria-expanded",
        hamburgerBtn.getAttribute("aria-expanded") === "false" ? "true" : "false"
    );
}
hamburgerBtn.addEventListener("click", toggleHamburger);