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CssRules_tamizh.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Complete CSS Selector Guide</title>
<style>
body {
font-family: Arial, sans-serif;
line-height: 1.6;
max-width: 1000px;
margin: 0 auto;
padding: 20px;
background-color: #f4f4f4;
}
.selector-example {
background-color: white;
border: 1px solid #ddd;
padding: 15px;
margin-bottom: 20px;
border-radius: 5px;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.output-section {
background-color: #f9f9f9;
border: 1px solid #e0e0e0;
padding: 10px;
margin-top: 10px;
border-radius: 3px;
}
h1 {
text-align: center;
color: #333;
}
h2 {
border-bottom: 2px solid #333;
padding-bottom: 10px;
color: #2c3e50;
}
code {
background-color: #f1f1f1;
padding: 2px 5px;
border-radius: 3px;
font-family: monospace;
}
pre {
background-color: #f1f1f1;
padding: 10px;
border-radius: 5px;
overflow-x: auto;
}
/* Demonstration Styles */
.universal-demo * {
border: 1px solid red;
margin: 5px;
padding: 5px;
}
.type-demo p {
color: green;
}
.class-demo .highlight {
background-color: yellow;
font-weight: bold;
}
.id-demo #main-title {
color: blue;
font-size: 24px;
text-align: center;
}
.attribute-demo input[type="text"] {
border: 2px solid purple;
padding: 5px;
}
.attribute-demo input[required] {
background-color: lightyellow;
}
.pseudo-demo a:hover {
color: red;
text-decoration: underline;
}
.pseudo-demo input:focus {
outline: 2px solid green;
background-color: lightyellow;
}
.first-child-demo li:first-child {
color: orange;
font-weight: bold;
}
.nth-child-demo tr:nth-child(even) {
background-color: #f2f2f2;
}
.descendant-demo .container p {
color: blue;
}
.child-demo .parent > .child {
border: 2px solid green;
}
.adjacent-demo h2 + p {
font-style: italic;
}
.general-sibling-demo h2 ~ p {
color: purple;
}
</style>
</head>
<body>
<h1>CSS Selectors: HTML, CSS, and Output</h1>
<div class="selector-example universal-demo">
<h2>Universal Selector (*)</h2>
<pre><code>
/* CSS */
* {
border: 1px solid red;
margin: 5px;
padding: 5px;
}
/* HTML */
<div>All elements will have red border</div>
<p>This includes paragraphs, divs...</p>
</code></pre>
<div class="output-section">
<div>All elements will have red border</div>
<p>This includes paragraphs, divs...</p>
</div>
</div>
<div class="selector-example type-demo">
<h2>Type Selector</h2>
<pre><code>
/* CSS */
p {
color: green;
}
/* HTML */
<p>This paragraph will be green</p>
<div>This div will not be affected</div>
</code></pre>
<div class="output-section">
<p>This paragraph will be green</p>
<div>This div will not be affected</div>
</div>
</div>
<div class="selector-example class-demo">
<h2>Class Selector</h2>
<pre><code>
/* CSS */
.highlight {
background-color: yellow;
font-weight: bold;
}
/* HTML */
<p class="highlight">Yellow background</p>
<div class="highlight">Also yellow</div>
<p>Not highlighted</p>
</code></pre>
<div class="output-section">
<p class="highlight">Yellow background</p>
<div class="highlight">Also yellow</div>
<p>Not highlighted</p>
</div>
</div>
<div class="selector-example id-demo">
<h2>ID Selector</h2>
<pre><code>
/* CSS */
#main-title {
color: blue;
font-size: 24px;
text-align: center;
}
/* HTML */
<h1 id="main-title">This title is blue</h1>
<h2>Only one element can have this ID</h2>
</code></pre>
<div class="output-section">
<h1 id="main-title">This title is blue</h1>
<h2>Only one element can have this ID</h2>
</div>
</div>
<div class="selector-example attribute-demo">
<h2>Attribute Selector</h2>
<pre><code>
/* CSS */
input[type="text"] {
border: 2px solid purple;
padding: 5px;
}
input[required] {
background-color: lightyellow;
}
/* HTML */
<input type="text" placeholder="Purple border">
<input type="email" placeholder="Normal border">
<input type="text" required placeholder="Yellow background">
</code></pre>
<div class="output-section">
<input type="text" placeholder="Purple border">
<input type="email" placeholder="Normal border">
<input type="text" required placeholder="Yellow background">
</div>
</div>
<div class="selector-example pseudo-demo">
<h2>Pseudo-Class Selectors</h2>
<pre><code>
/* CSS */
a:hover {
color: red;
text-decoration: underline;
}
input:focus {
outline: 2px solid green;
background-color: lightyellow;
}
/* HTML */
<a href="#">Hover over me</a>
<input type="text" placeholder="Click me">
</code></pre>
<div class="output-section">
<a href="#">Hover over me</a>
<input type="text" placeholder="Click me">
</div>
</div>
<div class="selector-example first-child-demo">
<h2>:first-child Selector</h2>
<pre><code>
/* CSS */
li:first-child {
color: orange;
font-weight: bold;
}
/* HTML */
<ul>
<li>First item (orange)</li>
<li>Second item</li>
<li>Third item</li>
</ul>
</code></pre>
<div class="output-section">
<ul>
<li>First item (orange)</li>
<li>Second item</li>
<li>Third item</li>
</ul>
</div>
</div>
<div class="selector-example nth-child-demo">
<h2>:nth-child Selector</h2>
<pre><code>
/* CSS */
tr:nth-child(even) {
background-color: #f2f2f2;
}
/* HTML */
<table>
<tr><td>Row 1</td></tr>
<tr><td>Row 2 (highlighted)</td></tr>
<tr><td>Row 3</td></tr>
<tr><td>Row 4 (highlighted)</td></tr>
</table>
</code></pre>
<div class="output-section">
<table>
<tr><td>Row 1</td></tr>
<tr><td>Row 2 (highlighted)</td></tr>
<tr><td>Row 3</td></tr>
<tr><td>Row 4 (highlighted)</td></tr>
</table>
</div>
</div>
<div class="selector-example descendant-demo">
<h2>Descendant Selector</h2>
<pre><code>
/* CSS */
.container p {
color: blue;
}
/* HTML */
<div class="container">
<p>Direct paragraph (blue)</p>
<span>
<p>Nested paragraph (also blue)</p>
</span>
</div>
</code></pre>
<div class="output-section">
<div class="container">
<p>Direct paragraph (blue)</p>
<span>
<p>Nested paragraph (also blue)</p>
</span>
</div>
</div>
</div>
<div class="selector-example child-demo">
<h2>Child Selector (>)</h2>
<pre><code>
/* CSS */
.parent > .child {
border: 2px solid green;
}
/* HTML */
<div class="parent">
<div class="child">Direct child (green border)</div>
<span>
<div class="child">Nested child (no border)</div>
</span>
</div>
</code></pre>
<div class="output-section">
<div class="parent">
<div class="child">Direct child (green border)</div>
<span>
<div class="child">Nested child (no border)</div>
</span>
</div>
</div>
</div>
<div class="selector-example adjacent-demo">
<h2>Adjacent Sibling Selector (+)</h2>
<pre><code>
/* CSS */
h2 + p {
font-style: italic;
}
/* HTML */
<h2>Heading</h2>
<p>Directly after heading (italic)</p>
<p>Another paragraph (normal)</p>
</code></pre>
<div class="output-section">
<h2>Heading</h2>
<p>Directly after heading (italic)</p>
<p>Another paragraph (normal)</p>
</div>
</div>
<div class="selector-example general-sibling-demo">
<h2>General Sibling Selector (~)</h2>
<pre><code>
/* CSS */
h2 ~ p {
color: purple;
}
/* HTML */
<h2>Heading</h2>
<p>First paragraph (purple)</p>
<p>Second paragraph (purple)</p>
<span>Not affected</span>
</code></pre>
<div class="output-section">
<h2>Heading</h2>
<p>First paragraph (purple)</p>
<p>Second paragraph (purple)</p>
<span>Not affected</span>
</div>
</div>
</body>
</html>