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CSS

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HTML 

              
                <div class="wrapper">
  <div id="cookies" role="alert" class="cookie-banner"><div class="inner">
    <div id="close" class="button button-secondary">Close</div>
    <h1>Obligatory cookie banner</h1>
    <div class="cookies-text">
    <div class="checkboxes">
    Which of these cookies can we use?
    <div id="choc-chip" class="pretty-checkbox">
    Chocolate chip</div>
    <div id="oatmeal-raisin" class="pretty-checkbox"> Oatmeal & raisin</div>
    </div>
    <div id="accept" class="button button-primary">Accept all
    </div>
    </div>
    </div>
  </div>
  <div class="header">
    <h1 class="title"><a href="#">The Woofer Times</a></h1>
    <div class="menu">
      <div class="menu-item"><a href="#">News</a></div>
      <div class="menu-item"><a href="#">Politics</a></div>
      <div class="menu-item"><a href="#">World</a></div>
      <div class="menu-item"><a href="#">Sport</a></div>
      <div class="menu-item"><a href="#">Tech</a></div>
    </div>
  </div>
  <div class="main">
    <h1>You won't believe this clickbaity headline</h1>
    <div class="byline"><em>N De Plume - 5th June 2021</em></div>
    <p>Doggo ipsum heckin angery woofer very taste wow smol borking doggo with a long snoot for pats you are doing me a frighten, ur givin me a spook. H*ck waggy wags much ruin diet doggorino fluffer, shooberino long water shoob smol. Porgo much ruin diet wrinkler doggorino, shoob very jealous pupper.</p>
    <div class="image"><img alt-"A lovely fluffy samoyed" src="https://codepen-assets.s3.eu-west-2.amazonaws.com/alex-russell-saw-Dj8cxyi9ink-unsplash-1.jpg">
      <p class="caption"><em>"The most angery pupper I have ever seen" Photo: <a href="https://unsplash.com/@alexrussellsaw?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText">Alex Russell-Saw</a></em></p>
    </div>
    <p> Borkf adorable doggo boof h*ck maximum borkdrive, most angery pupper I have ever seen shibe big ol pupper, heckin angery woofer extremely cuuuuuute ruff. Woofer big ol I am bekom fat pupperino shooberino, long bois snoot. </p>
    <b>And then something else happened</b>
    <p>Blop smol pats doge you are doin me a concern, long water shoob wrinkler. Much ruin diet clouds fluffer long water shoob, pupper. Ruff heckin good boys and girls wow very biscit h*ck mlem, blop borking doggo. Such treat dat tungg tho doggorino boof puggorino, very jealous pupper much ruin diet.</p>

    <p>Yapper long woofer what a nice floof I am bekom fat shoob ur givin me a spook such treat, borking doggo boof fluffer pupper. Heckin angery woofer borkdrive fluffer porgo doggo, smol borking doggo with a long snoot for pats long doggo. Very taste wow I am bekom fat long water shoob snoot long water shoob borkdrive heckin angery woofer, pats pupperino stop it fren long woofer heck. I am bekom fat smol boof very taste wow boofers shoob, noodle horse fluffer ruff. Clouds pupperino very good spot blop such treat most angery pupper I have ever seen, maximum borkdrive floofs bork.</p>
  </strong>
</div>
  <div class="footer">
    <p>© some media conglomerate 2021</p>
    <div class="columns">
      <div class="footer-links">
        <div><a href="#">About us</a></div>
        <div><a href="#">Careers</a></div>
        <div><a href="#">Contact us</a></div>
        <div><a href="#">Help</a></div>
      </div>
      <div class="social">
        <div class="social-link"><a href="https://twitter.com/type__error">Twitter</a></div>
        <div class="social-link"><a href="https://twitter.com/type__error">Facebook</a></div>
        <div class="social-link"><a href="https://twitter.com/type__error">Instagram</a></div>
        <div class="social-link"><a href="https://twitter.com/type__error">Tinder</a></div>
      </div>
    </div>
  </div>
</div>
!

CSS 

              
                a {
  color: white;
  font-weight: bold;
  text-decoration: none;
}
body {
  font-size: 16px;
  margin: 0;
  height: 100vh;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

.wrapper {
  height: 100%;
  display: flex;
  flex-direction: column;
}
.header {
  background-color: #420a55;
  padding: 1rem;
  color: white;

  .menu {
    display: flex;
    justify-content: space-evenly;
    &-item {
      font-weight: bold;
    }
  }
}

.main {
  flex: 1;
  padding: 1.5rem 3rem;
  a {
    color: initial;
  }

  .image {
    text-align: center;
    img {
      width: 60%;
    }
  }
}

.footer {
  text-align: center;
  padding: 1rem;
  background: #420a55;
  color: white;
  .columns {
    justify-content: center;
    display: flex;
    text-align: left;
    .social {
      margin-left: 1rem;
    }
  }
}

.cookie-banner {
  position: sticky;
  top: 0;
  background-color: #f0f0f0;
  width: 100%;
  .inner {
    position: relative;
    padding: 1rem;
  }
  #close {
    position: absolute;
    right: 1rem;
    font-size: 1rem;
    cursor: pointer;
  }
  .pretty-checkbox {
    &:before {
      margin-bottom: -2px;
      display: inline-block;
      background-repeat: no-repeat;
      content: " ";
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23420a55' viewBox='0 0 46 46'%3e%3cpath d='M35.822 0H10.178C4.557 0 0 4.557 0 10.178v25.646C0 41.443 4.557 46 10.178 46h25.645C41.443 46 46 41.443 46 35.822V10.178C46 4.557 41.443 0 35.822 0zM40 35.822A4.182 4.182 0 0135.822 40H10.178A4.182 4.182 0 016 35.822V10.178A4.182 4.182 0 0110.178 6h25.645A4.182 4.182 0 0140 10.178v25.644z'/%3e%3c/svg%3e");
      width: 16px;
      height: 16px;
    }
    &.checked:before {
background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23420a55' viewBox='0 0 46 46'%3e%3cpath d='M35.822 0H10.178C4.557 0 0 4.557 0 10.178v25.646C0 41.443 4.557 46 10.178 46h25.645C41.443 46 46 41.443 46 35.822V10.178C46 4.557 41.443 0 35.822 0zM40 35.822A4.182 4.182 0 0135.822 40H10.178A4.182 4.182 0 016 35.822V10.178A4.182 4.182 0 0110.178 6h25.645A4.182 4.182 0 0140 10.178v25.644z'/%3e%3cpath d='M21.925 33.298a3.253 3.253 0 01-4.596 0l-7.122-7.122a3.25 3.25 0 114.597-4.596l4.243 4.242c.321.32.84.32 1.161 0l11.489-11.489c1.27-1.27 3.326-1.27 4.597 0s1.271 3.327 0 4.597L21.925 33.298z'/%3e%3c/svg%3e");
    }
  }

  .cookies-text {
    width: 80%;
    display: flex;
    justify-content: space-between;
  }

  .button {
    cursor: pointer;
    border: 0;
    box-shadow: none;
    border-radius: 6px;
    font-weight: bold;
    font-size: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.8rem 1rem;
    margin: auto 0;
    &-primary {
      color: white;
      background-color: #420a55;
      &:hover {
        background: #8d6c99;
      }
    }
    &-secondary {
      background: white;
      border: 1px solid #aaaaaa;
      &:hover {
        background: #aaaaaa;
      }
    }
  }
  &.hidden {
    display: none;
  }
}
!

JS 

              
                let selected = [];

function selectCookie(cookie) {
  if (selected.includes(cookie)) {
    selected = selected.filter((c) => c !== cookie);
    document.getElementById(cookie).classList.remove("checked");
    return;
  }
  selected.push(cookie);
  document.getElementById(cookie).classList.add("checked");
}

document.getElementById("choc-chip").onclick = () => selectCookie("choc-chip");
document.getElementById("oatmeal-raisin").onclick = () =>
  selectCookie("oatmeal-raisin");

document.getElementById("close").onclick = closeCookies;

document.getElementById("accept").onclick = closeCookies;

function closeCookies() {
  document.getElementById("cookies").classList.add("hidden");
}
!
999px

Console