Learn Typography by Building a Nutrition Label - Step 35

Tell us what’s happening:
Describe your issue in detail here.
There is something I do not understand here, I think that overflow: hidden will clip the h1 to fit in the container, but after setting the overflow property to hidden, the width ang height of h1, which is 230 remains the same. Beside that, the container(.calories)'s height change from 56.818px to 65px. can you explain to me why? Thank you so much.

  **Your code so far**
/* file: index.html */
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Nutrition Label</title>
  <link href="https://fonts.googleapis.com/css?family=Open+Sans:400,700,800" rel="stylesheet">
  <link href="./styles.css" rel="stylesheet">
</head>
<body>
  <div class="label">
    <header>
      <h1 class="bold">Nutrition Facts</h1>
      <div class="divider"></div>
      <p>8 servings per container</p>
      <p class="bold">Serving size <span class="right">2/3 cup (55g)</span></p>
    </header>
    <div class="divider lg"></div>
    <div class="calories-info">
      <p class="bold sm-text">Amount per serving</p>
      <h1>Calories <span class="right">230</span></h1>
    </div>
  </div>
</body>
</html>
/* file: styles.css */
* {
box-sizing: border-box;
}

html {
font-size: 16px;
}

body {
font-family: 'Open Sans', sans-serif;
}

.label {
border: 2px solid black;
width: 270px;
margin: 20px auto;
padding: 0 7px;
}

header h1 {
text-align: center;
margin: -4px 0;
letter-spacing: 0.15px
}

p {
margin: 0;
}

.divider {
border-bottom: 1px solid #888989;
margin: 2px 0;
}

.bold {
font-weight: 800;
}

.right {
float: right;
}

.lg {
height: 10px;
}

.lg, .md {
background-color: black;
border: 0;
}

.sm-text {
font-size: 0.85rem;
}

.calories-info h1 {
margin: -5px -2px;
}

.calories-info span {
font-size: 1.2em;
}
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Challenge: Learn Typography by Building a Nutrition Label - Step 35

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