align div horizontally after screen resize using css-CodePudding

I'm trying to align div horizontally as the browser resizes, currently, I have 3 divs. As per the requirement, I can add an additional div. My problem is as soon i increase the window size above 2500, the right side of the screen becomes empty & all the divs are floating to left. As I cannot set the div width to 30-33% as per the requirement. Below is my code. kindly help.

div.box-container {
  mc-grid-row: true;
  margin-left: auto;
  margin-right: auto;
  float: left;
  display: flex;
  width: 100%
}

div.box {
  float: left;
  background-color: #ffffff;
  position: relative;
  padding: 10px;
  box-sizing: border-box;
  height: 326px;
  margin-left: 20px;
  margin-bottom: 0;
  top: 55px;
  border-top-right-radius: 0px;
  width: 30%;
  border: 1px solid #cccccc;
}

<div >

  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
</div>

CodePudding user response：

Use justify-content: center; when you are using flex. This means the flexed contents will always be centered on all screen types.

div.box-container {
  mc-grid-row: true;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  gap: 10px;
  justify-content: center;
  width: 100%
}

div.box {
  background-color: #ffffff;
  position: relative;
  padding: 10px;
  box-sizing: border-box;
  height: 326px;
  margin-bottom: 0;
  top: 55px;
  border-top-right-radius: 0px;
  width: 33.33%;
  border: 1px solid #cccccc;
}

body {
  margin: 0;
}

<div >

  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
</div>

Edit ~ add another div, reduce the % the div covers.

div.box-container {
  mc-grid-row: true;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  gap: 10px;
  justify-content: center;
  width: 100%
}

div.box {
  background-color: #ffffff;
  position: relative;
  padding: 10px;
  box-sizing: border-box;
  height: 326px;
  margin-bottom: 0;
  top: 55px;
  border-top-right-radius: 0px;
  width: 25%;
  border: 1px solid #cccccc;
}

body {
  margin: 0;
}

<div >

  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
  <div >
    <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
  </div>
</div>

CodePudding user response：

Remove float and only use from flex:

div.box-container {
    mc-grid-row: true;
    margin-left: auto;
    margin-right: auto;
    display: flex;
    width:100%;
}
div.box {
    background-color: #ffffff;
    padding: 10px;
    height: 326px;
    margin-left: 20px;
    margin-bottom: 0;
    top: 55px;
    border-top-right-radius: 0px;
    width:33%;
    border:1px solid #cccccc;
    word-break: break-word;
}

<div >
                                               
            <div >
                <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
                </div>
            <div >
                <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
                </div>
            <div >
                <p>jfn,mnfngf,mn,mgfnbgnkjdkjgkdg</p>
                </div>
    </div>