CSS :first-letter
The CSS :first-letter pseudo-element is used to style the first letter of the first line of a block-level element, such as a paragraph. This is commonly used to create decorative effects like drop caps or to emphasize the first letter of a section.
The syntax for the :first-letter pseudo-element is:
selector:first-letter {
    property: value;
}Where:
| Parameter | Description | 
|---|---|
| selector | The block-level element (e.g., <p>,<div>) to which the:first-letterpseudo-element will apply. | 
| property | The CSS property to style the first letter. | 
| value | The value assigned to the CSS property. | 
Examples
1. Styling the First Letter with Font Size
In this example, the first letter of each paragraph is styled with a larger font size and bold text.
index.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <style>
        p:first-letter {
            font-size: 2em;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    <p>Vivamus luctus urna sed urna ultricies ac tempor dui sagittis.</p>
</body>
</html>2. Applying a Drop Cap Effect
Here, the first letter of paragraphs is styled with a larger font size and floated to create a drop cap effect.
index.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <style>
        p:first-letter {
            font-size: 3em;
            font-weight: bold;
            float: left;
            margin-right: 10px;
            line-height: 1;
        }
    </style>
</head>
<body>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor.</p>
</body>
</html>3. Changing the Color of the First Letter
In this example, the first letter of each paragraph is styled with a red color.
index.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <style>
        p:first-letter {
            color: red;
        }
    </style>
</head>
<body>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    <p>Sed cursus turpis vitae tortor.</p>
</body>
</html>4. Styling the First Letter with Text Transform
Here, the first letter is styled with uppercase transformation and a different font family.
index.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <style>
        p:first-letter {
            text-transform: uppercase;
            font-family: "Courier New", Courier, monospace;
        }
    </style>
</head>
<body>
    <p>lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    <p>vivamus luctus urna sed urna ultricies ac tempor dui sagittis.</p>
</body>
</html>5. Combining Multiple Styles on the First Letter
In this example, the first letter is styled with a combination of font size, color, and text-shadow.
index.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <style>
        p:first-letter {
            font-size: 2.5em;
            color: navy;
            text-shadow: 1px 1px 2px gray;
        }
    </style>
</head>
<body>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    <p>Sed cursus turpis vitae tortor.</p>
</body>
</html>