External Spacing or Margin

index.html

<div class="container">
  <h1>External Spacing or Margin</h1>

  <div class="box">
    <div class="m-top">
      <div></div>
      <div></div>
      <p>margin-top: 60px;</p>
    </div>

    <div class="m-right">
      <div></div>
      <div></div>
      <p>margin-right: 60px;</p>
    </div>

    <div class="m-bottom">
      <div></div>
      <div></div>
      <p>margin-bottom: 30px;</p>
    </div>

    <div class="m-left">
      <div></div>
      <div></div>
      <p>margin-left: 60px;</p>
    </div>

    <div class="m-allFourSides">
      <div></div>
      <div></div>
      <p>All four sides: 60px;</p>
    </div>
  </div>
</div>

style.css

@import url("https://fonts.googleapis.com/css2?family=Rowdies&display=swap");

/* MAIN CODE SHOWCASING THE USE OF MARGIN */

.m-top > div {
  margin-top: 60px;
}

.m-right > div {
  margin-right: 60px;
}

.m-bottom > div {
  margin-bottom: 60px;
}

.m-left > div {
  margin-left: 60px;
}

.m-allFourSides > div {
  margin: 60px;
}

/* -------------------------- */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  font-family: "Rowdies", cursive;
  color: #262626;
}

.container {
  width: 100%;
  height: 100%;
  border: 16px ridge #ff6550;
  background: #ffe7e7;
  text-align: center;
  overflow: auto;
}

.box {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(200px, 1fr));
  justify-content: center;
  align-items: center;
  gap: 3rem;
  padding: 2rem;
}

[class^="m-"] {
  border: 4px solid tomato;
}

[class^="m-"] > div {
  width: 100px;
  height: 100px;
  background: #d33a25;
}

@media (max-width: 900px) {
  .box {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}