1. Inline CSS (Inside HTML Elements)
This method applies styles directly within the HTML tags using the ‘style‘ attribute.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Inline CSS Example</title>
</head>
<body>
<h1 style="color: blue; text-align: center;">Hello, World!</h1>
<p style="font-size: 18px; color: gray;">This paragraph is styled using inline CSS.</p>
</body>
</html>
2. Internal CSS (Inside the 'style' Tag)
This method places CSS styles inside the <style> tag within the <head> section of the HTML document.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Internal CSS Example</title>
<style>
body {
background-color: #f0f8ff;
text-align: center;
font-family: Arial, sans-serif;
}
h1 {
color: darkred;
}
p {
font-size: 18px;
color: black;
}
</style>
</head>
<body>
<h1>Welcome to My Website</h1>
<p>This paragraph is styled using internal CSS.</p>
</body>
</html>
3. External CSS (Using a Separate .css File)
This method links an external .css file to the HTML document.
HTML (index.html):
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>External CSS Example</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<h1>External CSS Example</h1>
<p>This paragraph is styled using an external CSS file.</p>
</body>
</html>
CSS (style.css):
body {
background-color: lightgray;
text-align: center;
font-family: Arial, sans-serif;
}
h1 {
color: navy;
}
p {
font-size: 18px;
color: darkslategray;
}
4. CSS Classes and IDs
Classes and IDs allow you to apply styles selectively.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CSS Classes and IDs</title>
<style>
.highlight {
color: blue;
font-weight: bold;
}
#special {
color: red;
font-size: 20px;
}
</style>
</head>
<body>
<h1 class="highlight">This is a highlighted heading</h1>
<p class="highlight">This paragraph shares the same class.</p>
<p id="special">This paragraph has a unique ID and different styling.</p>
</body>
</html>
5. CSS Hover Effect
This example changes the color of a button when the mouse hovers over it.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CSS Hover Effect</title>
<style>
.btn {
background-color: #008cba;
color: white;
padding: 10px 20px;
border: none;
cursor: pointer;
font-size: 16px;
}
.btn:hover {
background-color: #005f73;
}
</style>
</head>
<body>
<button class="btn">Hover Over Me</button>
</body>
</html>
