Added CSS examples

author: Kamal Wickramanayake <kamal@inbox.lk> 2026-07-04 14:35:25 +0530
committer: Kamal Wickramanayake <kamal@inbox.lk> 2026-07-04 14:35:25 +0530
commit: c3dd2a6d44ef929e0832ce6dca53a818e6711218 (patch)
tree: 66d7254ef8534a0e23b50f9d1fce41cb36a8e6ab /css
parent: 975dccebfcf51878b790a765d8e92ebcad895a24 (diff)
8 files changed, 387 insertions, 0 deletions
diff --git a/css/01-no-css/index.html b/css/01-no-css/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <title>Retro Styled Pure HTML</title>
+</head>
+<!-- Sets background color and text color natively via body attributes -->
+<body bgcolor="#f0f4f8" text="#2d3748">
+
+    <!-- Table container used to mimic a centered layout box -->
+    <table align="center" width="600" bgcolor="#ffffff" cellpadding="20" style="border-collapse: collapse;">
+        <tr>
+            <td>
+                <!-- Heading with manual alignment -->
+                <h1 align="center">Retro Native Styling</h1>
+                <hr color="#e2e8f0" size="1">
+                
+                <p>This layout uses structural tables and attributes to center and color the canvas rather than an external CSS document.</p>
+                
+                <!-- Presentational table acting as a decorative callout block -->
+                <table width="100%" bgcolor="#e6fffa" cellpadding="15">
+                    <tr>
+                        <td>
+                            <strong>Fun Fact:</strong> This page works identically in a modern browser and a browser from 1996!
+                        </td>
+                    </tr>
+                </table>
+                
+                <p align="right">
+                    <font size="2" color="#718096">Minimalist footer note</font>
+                </p>
+            </td>
+        </tr>
+    </table>
+
+</body>
+</html>
+
diff --git a/css/02-inline-styling-with-css-properties/index.html b/css/02-inline-styling-with-css-properties/index.html
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+<!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 style="background-color: #f4f7f6; font-family: Arial, sans-serif; padding: 20px;">
+
+    <!-- Styled Heading -->
+    <h1 style="color: #2c3e50; text-align: center; border-bottom: 2px solid #2c3e50; padding-bottom: 10px;">
+        Welcome to My Website
+    </h1>
+
+    <!-- Styled Paragraph -->
+    <p style="color: #34495e; font-size: 16px; line-height: 1.6; max-width: 600px; margin: 20px auto;">
+        This paragraph is styled using <strong>inline CSS</strong>. The font size, color, line height, and alignment are controlled directly inside the HTML tag via the <code style="background-color: #e0e0e0; padding: 2px 6px; border-radius: 4px;">style</code> attribute.
+    </p>
+
+    <!-- Styled Call-to-Action Box -->
+    <div style="background-color: #ffffff; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); padding: 20px; text-align: center; max-width: 400px; margin: 30px auto;">
+        <h2 style="color: #e74c3c; margin-top: 0;">Special Offer!</h2>
+        <p style="color: #7f8c8d;">Get access to exclusive web development content today.</p>
+        
+        <!-- Styled Button -->
+        <button style="background-color: #2ecc71; color: white; border: none; padding: 10px 20px; font-size: 16px; border-radius: 5px; cursor: pointer;">
+            Sign Up Now
+        </button>
+    </div>
+
+</body>
+</html>
+
diff --git a/css/03-embedded-css-utility-classes/index.html b/css/03-embedded-css-utility-classes/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Embedded CSS Example</title>
+    <style>
+        /* --- REUSABLE UTILITY CLASSES --- */
+        
+        /* Flexbox center utility */
+        .flex-center {
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            min-height: 100vh;
+            margin: 0;
+            font-family: Arial, sans-serif;
+            background-color: #f4f7f6;
+        }
+
+        /* Card Component */
+        .card {
+            background-color: #ffffff;
+            padding: 24px;
+            border-radius: 8px;
+            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+            max-width: 400px;
+            text-align: center;
+        }
+
+        /* Base Button */
+        .btn {
+            display: inline-block;
+            padding: 12px 24px;
+            font-size: 16px;
+            font-weight: bold;
+            text-decoration: none;
+            border-radius: 6px;
+            border: none;
+            cursor: pointer;
+            transition: background-color 0.3s ease;
+        }
+
+        /* Button Modifiers for Reusability */
+        .btn-primary {
+            background-color: #007bff;
+            color: #ffffff;
+        }
+        
+        .btn-primary:hover {
+            background-color: #0056b3;
+        }
+
+        .btn-secondary {
+            background-color: #6c757d;
+            color: #ffffff;
+            margin-left: 10px;
+        }
+
+        .btn-secondary:hover {
+            background-color: #5a6268;
+        }
+    </style>
+</head>
+<body class="flex-center">
+
+    <div class="card">
+        <h2>Welcome Back</h2>
+        <p>This is a reusable embedded CSS setup. Both buttons below share the base <strong>.btn</strong> rule, but use different modifiers.</p>
+        
+        <div style="margin-top: 20px;">
+            <a href="#" class="btn btn-primary">Sign In</a>
+            <a href="#" class="btn btn-secondary">Learn More</a>
+        </div>
+    </div>
+
+</body>
+</html>
+
diff --git a/css/04-external-css/index.html b/css/04-external-css/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Reusable CSS Demo</title>
+  <!-- Linking the separate CSS file -->
+  <link rel="stylesheet" href="styles.css">
+</head>
+<body>
+
+  <h1>Reusable Components Example</h1>
+
+  <!-- Reusing the .card class and different button variations -->
+  <div class="card">
+    <h2>Product Feature A</h2>
+    <p>This layout uses the primary action button style.</p>
+    <button class="btn btn-primary">Accept</button>
+  </div>
+
+  <div class="card">
+    <h2>Product Feature B</h2>
+    <p>This layout reuses the exact same card wrapper but switches to a secondary button.</p>
+    <button class="btn btn-secondary">Learn More</button>
+  </div>
+
+  <div class="card">
+    <h2>The beauty of CSS design</h2>
+    <p>Visit <a href="https://csszengarden.com/" target="_blank">CSS Zen Garden</a> and try changing designs.</p>
+  </div>
+</body>
+</html>
+
diff --git a/css/04-external-css/styles.css b/css/04-external-css/styles.css
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+/* 1. Global design tokens (Variables) */
+:root {
+  --primary-color: #3498db;
+  --secondary-color: #2ecc71;
+  --text-dark: #2c3e50;
+  --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+  --border-radius: 8px;
+}
+
+/* 2. Base Element Resets */
+body {
+  font-family: var(--font-main);
+  color: var(--text-dark);
+  line-height: 1.6;
+  padding: 20px;
+}
+
+/* 3. Reusable Component Classes */
+.card {
+  border: 1px solid #e0e0e0;
+  border-radius: var(--border-radius);
+  padding: 20px;
+  margin-bottom: 15px;
+  box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.3);
+}
+
+.btn {
+  display: inline-block;
+  padding: 10px 20px;
+  font-size: 1rem;
+  font-weight: bold;
+  text-align: center;
+  text-decoration: none;
+  border-radius: var(--border-radius);
+  border: none;
+  cursor: pointer;
+  transition: opacity 0.2s ease;
+}
+
+.btn:hover {
+  opacity: 0.9;
+}
+
+/* 4. Reusable Modifier Classes */
+.btn-primary {
+  background-color: var(--primary-color);
+  color: white;
+}
+
+.btn-secondary {
+  background-color: var(--secondary-color);
+  color: white;
+}
+
diff --git a/css/05-classless-css/index.html b/css/05-classless-css/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Beautiful HTML-Only Page</title>
+    <!-- The magic line: This automatically styles everything below -->
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@exampledev/new.css@1.1.2/new.min.css">
+</head>
+<body>
+
+    <header>
+        <h1>🚀 Built with Pure HTML</h1>
+        <p>Zero custom CSS files were written to create this look.</p>
+    </header>
+
+    <main>
+        <article>
+            <h2>Semantic Layouts Work Best</h2>
+            <p>Classless frameworks look at your semantic HTML tags. They add consistent padding, clean typography, and standard responsive widths automatically.</p>
+	    <p>This page is styled using <a href="https://newcss.net/" target="_blank">new.css</a>.</p>
+        </article>
+
+        <section>
+            <h3>Interactive Elements</h3>
+            <p>Notice how inputs and buttons are automatically styled:</p>
+            <form action="#">
+                <input type="email" placeholder="Enter your email...">
+                <button type="submit">Subscribe</button>
+            </form>
+        </section>
+    </main>
+
+    <footer>
+        <p>&copy; 2026 No-CSS Experiment</p>
+    </footer>
+
+</body>
+</html>
+
diff --git a/css/06-css-units/images/hulftsdorp.jpg b/css/06-css-units/images/hulftsdorp.jpg
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+++ b/css/06-css-units/images/hulftsdorp.jpg
diff --git a/css/06-css-units/index.html b/css/06-css-units/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Modern CSS Units Demo</title>
+    <style>
+        /* 1. Root Definition: Using px to establish a base size */
+        :root {
+            font-size: 16px; /* Base size for root (1rem = 16px) */
+        }
+
+        /* Reset and Box Sizing */
+        * {
+            box-sizing: border-box;
+            margin: 0;
+            padding: 0;
+        }
+
+        body {
+            font-family: Arial, sans-serif;
+            color: #333;
+        }
+
+        /* 2. Viewport Height & Width: vh, vw */
+        .hero {
+            height: 80vh; /* Takes up 80% of the viewport height */
+            width: 100vw;  /* Takes up 100% of the viewport width */
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            display: flex;
+            flex-direction: column;
+            justify-content: center;
+            align-items: center;
+            text-align: center;
+            color: white;
+            padding: 2rem;
+        }
+
+        /* 3. Root em (rem): rem for scalable typography */
+        .hero h1 {
+            font-size: 3rem; /* 3 x 16px = 48px */
+            margin-bottom: 1rem; /* 1 x 16px = 16px */
+        }
+
+        .hero p {
+            font-size: 1.25rem; /* 1.25 x 16px = 20px */
+            max-width: 60ch; /* Limits the width to about 60 characters for readability */
+        }
+
+        /* 4. Content Area */
+        .content {
+            padding: 3rem 5%; /* Padding utilizes rem and percentage */
+            max-width: 1200px; /* Absolute max-width constraint */
+            margin: 0 auto;
+        }
+
+        /* 5. Em unit: em for element-specific relative sizing */
+        .card {
+            background-color: #f9f9f9;
+            border: 1px solid #ddd;
+            padding: 2em; /* Padding is relative to the card's own font-size */
+            margin-bottom: 2rem;
+            border-radius: 0.5em; /* Border radius scales with the card's font */
+        }
+
+        .card h2 {
+            font-size: 2em; /* 2 x card base font-size */
+            margin-bottom: 0.5em;
+        }
+
+        .card p {
+            font-size: 1em; /* Matches the card base font-size */
+            line-height: 1.6;
+        }
+
+        /* 6. Percentage (%) and Pixels (px) */
+        .image-container {
+            width: 100%; /* Takes 100% of the parent card's width */
+            max-width: 400px; /* Max width constraint in pixels */
+            margin: 1rem auto 0 auto;
+        }
+
+        .image-container img {
+            max-width: 100%;
+            height: auto;
+            border-radius: 8px; /* Strict absolute unit for rounding */
+	        display: block; /* Removes unwanted baseline spacing */
+        }
+    </style>
+</head>
+<body>
+
+    <div class="hero">
+        <h1>Responsive Layout with CSS Units</h1>
+        <p>This section uses <strong>vh</strong> for height and <strong>vw</strong> for width. The typography uses <strong>rem</strong> and <strong>ch</strong>.</p>
+    </div>
+
+    <div class="content">
+        <div class="card">
+            <h2>The Card Heading</h2>
+            <p>This card's padding and margins scale relative to its own font-size using the <strong>em</strong> unit. The card width is controlled by percentages and absolute pixels.</p>
+            <div class="image-container">
+                <!-- Using percentage and px for sizing -->
+		<a href="https://www.adhikarana.org/" target="_blank"><img src="images/hulftsdorp.jpg" alt="Hulftsdorp, Colombo">
+            </div>
+        </div>
+    </div>
+
+</body>
+</html>
+
author	Kamal Wickramanayake <kamal@inbox.lk>	2026-07-04 14:35:25 +0530
committer	Kamal Wickramanayake <kamal@inbox.lk>	2026-07-04 14:35:25 +0530
commit	c3dd2a6d44ef929e0832ce6dca53a818e6711218 (patch)
tree	66d7254ef8534a0e23b50f9d1fce41cb36a8e6ab /css
parent	975dccebfcf51878b790a765d8e92ebcad895a24 (diff)