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HTML / CSS Calc / Flexbox positioning problem

I have been trying to make a page which has 3 horizontal sections, with content in the middle section that overlaps the sections above and below it. The content in the middle section is arranged using flex.

I attempted to set the position of the mid section content 100px above and using calc to set the height of the content to be 100% - 200px but not getting the desired effect.

This is what I am trying for:

enter image description here

And this is the HTML/CSS I am using:

* {
  margin: 0px;
  padding: 0px;
}

.sectionClass {
  min-height: 300px;
}

#section01 {
  background-color: aquamarine;
  height: 300px;
}

#section02 {
  background-color: brown;
}

#section03 {
  background-color: purple;
  height: 300px;
}

#mainContainer {
  position: relative;
  top: -100px;
  height: calc(100% - 200px);
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-evenly;
}

.sectionItem {
  max-width: calc(100% / 6);
  margin: 10px;
  border: 1px solid #222;
}

.sectionItem p {
  font-size: 14px;
}
<body>
  <div id="section01" class="sectionClass"></div>
  <div id="section02" class="sectionClass">
    <div id="mainContainer">
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
      <div class="sectionItem">
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
        <p>Lorem ipsum dolor sit amet.Lorem ipsum dolor sit amet.</p>
      </div>
    </div>
  </div>
  <div id="section03" class="sectionClass"></div>
</body>

Can anyone suggest where I am going wrong?

Thanks in advance.x

This is what I am getting:

enter image description here

Tags:

2

Answers


  1. 0

    Try removing the

    #section03{
    background-color: purple;
    height: 300px; <-
}

    if this doesnt work , try adding a overflow:hidden in section03 , or you can try with section 2 , but to make it with margins- , if that doesnt help feel free to email me.

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  2. 0

    I used grid instead of flexbox for this exemple but you can do what you want with a absolute ::after. Like this

    :root {
  --card-width: 200px;
  --card-height: 300px;
}

.cardparent {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--card-width), 1fr));
  grid-template-rows: repeat(5, var(--card-height));
  gap: 10px;
  position: relative;
}

.cardparent::after {
  content: " ";
  display: block;
  position: absolute;
  width: 100%;
  height: calc(100% - var(--card-height));
  top: calc(var(--card-height) / 2);
  left: 0;
  background-color: rgba(30, 66, 13, 0.5);
}

.card {
  background-color: #0D2840;
  z-index: 1;
}


/* 
For this snippet only 
*/

body {
  padding: 0;
  margin: 0;
}

h1 {
  margin: 0
}

section {
  min-height: 50dvh;
}

#sec1 {
  background-color: #DCE8F2;
}

#sec2 {
  background-color: #80A2BF;
  padding: 20px;
}

#sec3 {
  background-color: #54728C;
}
    <section id="sec1">
  <h1>Section 1</h1>
</section>
<section id="sec2" class="cardparent">
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>
  <div class="card"></div>

</section>
<section id="sec3">
  <h1>Section 3</h1>
</section>
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