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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>Chapter 4: Control Flow - Python</title>
  <style>
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      margin: 0;
      padding: 20px;
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    h1, h2 {
      color: #2b6cb0;
      text-align: center;
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    }

    .code-block, .output-block, .wrong-block {
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      background: #f4f4f4;
      padding: 10px;
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    /* Flexbox Layout */
    .content {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
    }

    .section {
      flex: 1 1 45%;
      margin: 10px;
    }

    /* Responsive Styles */
    @media (max-width: 768px) {
      .content {
        flex-direction: column;
        align-items: center;
      }
      .section {
        flex: 1 1 100%;
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    }

    @media (max-width: 480px) {
      h1, h2 {
        font-size: 1.5rem;
      }
      .section {
        padding: 15px;
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  </style>
</head>
<body>

<h1>Chapter 4: Python Control Flow</h1>
<h2>if, else, elif Statements & Nested Conditions</h2>

<div class="content">
  <div class="section">
    <h2>1. if Statement</h2>
    <p><strong>Kya karta hai:</strong> Yeh condition ko check karta hai aur agar condition true hoti hai, to block of code execute hota hai.</p>

    <div class="rule"><strong>Rule:</strong> Condition ko sahi likhna zaroori hai, agar galat likha to statement execute nahi hoga.</div>

    <div class="code-block">
# if statement example
age = 20
if age >= 18:
    print("You are an adult.")
    </div>
    <div class="output-block">
You are an adult.
    </div>

    <div class="wrong-block">
# if statement example with wrong condition
age = 15
if age >= 18:
    print("You are an adult.")
else:
    print("You are not an adult.")
    </div>
    <div class="output-block">
You are not an adult.
    </div>
  </div>

  <div class="section">
    <h2>2. else Statement</h2>
    <p><strong>Kya karta hai:</strong> Yeh default block hota hai jo else ke baad likha jata hai, jab condition false hoti hai.</p>

    <div class="rule"><strong>Rule:</strong> Else statement ko tabhi use karo jab condition fail ho jaaye.</div>

    <div class="code-block">
# else statement example
age = 15
if age >= 18:
    print("You are an adult.")
else:
    print("You are not an adult.")
    </div>
    <div class="output-block">
You are not an adult.
    </div>

  </div>

  <div class="section">
    <h2>3. elif Statement</h2>
    <p><strong>Kya karta hai:</strong> Yeh else aur if ka combination hota hai. Jab ek se zyada conditions check karni hoti hain to elif ka use hota hai.</p>

    <div class="rule"><strong>Rule:</strong> elif ko tab use karo jab ek hi time pe multiple conditions check karni ho.</div>

    <div class="code-block">
# elif statement example
age = 25
if age < 18:
    print("You are a child.")
elif age < 30:
    print("You are a young adult.")
else:
    print("You are an adult.")
    </div>
    <div class="output-block">
You are a young adult.
    </div>
  </div>

  <div class="section">
    <h2>4. Nested Conditions</h2>
    <p><strong>Kya karta hai:</strong> Jab ek condition ke andar doosri condition likhi jaati hai, to usse nested condition kehte hain.</p>

    <div class="rule"><strong>Rule:</strong> Nested conditions ko tab use karo jab complex decision making ho.</div>

    <div class="code-block">
# Nested if statement example
age = 25
if age >= 18:
    if age < 30:
        print("You are a young adult.")
    else:
        print("You are an adult.")
else:
    print("You are not an adult.")
    </div>
    <div class="output-block">
You are a young adult.
    </div>
  </div>
</div>

</body>
</html>