grid-layout.html

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  <title>10. Grid Layout</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Poppins', sans-serif;
      background-color: #1cc9be;
      padding: 20px;
    }
    .section {
      background: rgba(255, 255, 255, 0.3);
      padding: 20px;
      border-radius: 15px;
      max-width: 1000px;
      margin: auto;
      box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    }
    h2, h3 {
      color: #349;
      margin-bottom: 15px;
    }
    p {
      font-size: 18px;
      margin-bottom: 15px;
      line-height: 1.6;
    }
    textarea, iframe {
      width: 100%;
      height: 180px;
      font-size: 16px;
      padding: 10px;
      margin: 10px 0 20px;
      border-radius: 10px;
      border: 2px solid white;
      background: rgba(255,248,240,0.4);
      font-family: monospace;
    }
    iframe {
      margin-top: 10px;
    }
    button {
      background: #007bff;
      color: #fff;
      border: none;
      padding: 8px 20px;
      font-size: 15px;
      font-weight: 500;
      border-radius: 8px;
      cursor: pointer;
      margin-bottom: 20px;
      transition: all 0.3s ease-in-out;
      position: relative;
      overflow: hidden;
    }
    button::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(120deg, #00bcd4, #2196f3);
      transition: all 0.4s ease;
      z-index: -1;
    }
    button:hover::before {
      left: 0;
    }
    button:hover {
      color: #fff;
      box-shadow: 0 4px 10px rgba(0,0,0,0.2);
      transform: translateY(-1px);
    }
    button:active {
      transform: scale(0.95);
      box-shadow: none;
    }
  </style>
</head>
<body>
  <div class="section">
    <h2>10. Grid Layout</h2>

    <h3>I. Grid Container & Items</h3>
    <p><strong>Explanation:</strong> Grid layout ek 2-dimensional layout system hai jisme rows aur columns dono ka control hota hai. Parent ko <code>display: grid</code> dene par wo container ban jata hai.</p>

    <textarea id="code1">
<style>
.grid {
  display: grid;
  grid-template-columns: auto auto auto;
  gap: 10px;
  background: lightgray;
  padding: 10px;
}
.box {
  background: #007bff;
  color: white;
  padding: 20px;
  text-align: center;
  border-radius: 8px;
}
</style>
<div class="grid">
  <div class="box">1</div>
  <div class="box">2</div>
  <div class="box">3</div>
  <div class="box">4</div>
  <div class="box">5</div>
  <div class="box">6</div>
</div>
    </textarea>
    <button onclick="runCode('code1', 'output1')">Run Code</button>
    <iframe id="output1"></iframe>

    <h3>II. Template Rows & Columns</h3>
    <p><strong>Explanation:</strong> <code>grid-template-columns</code> aur <code>grid-template-rows</code> se hum define karte hain kitni columns ya rows honi chahiye aur unka size kya hoga.</p>

    <textarea id="code2">
<style>
.grid {
  display: grid;
  grid-template-columns: 100px 200px 100px;
  grid-template-rows: 60px 60px;
  gap: 10px;
  background: #fce4ec;
  padding: 10px;
}
.box {
  background: #ec407a;
  color: white;
  text-align: center;
  padding: 10px;
  border-radius: 8px;
}
</style>
<div class="grid">
  <div class="box">A</div>
  <div class="box">B</div>
  <div class="box">C</div>
  <div class="box">D</div>
  <div class="box">E</div>
  <div class="box">F</div>
</div>
    </textarea>
    <button onclick="runCode('code2', 'output2')">Run Code</button>
    <iframe id="output2"></iframe>

    <h3>III. Item Placement & Spanning</h3>
    <p><strong>Explanation:</strong> Grid items ko specific row ya column me rakhne ke liye hum <code>grid-column</code> aur <code>grid-row</code> use karte hain. <br> Spanning ka matlab hai ek item multiple rows/columns tak faila ho.</p>

    <textarea id="code3">
<style>
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  background: #e0f7fa;
  padding: 10px;
}
.item {
  background: #00acc1;
  color: white;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
}
.span2 {
  grid-column: span 2;
}
</style>
<div class="grid">
  <div class="item">1</div>
  <div class="item span2">2 (spans 2 columns)</div>
  <div class="item">3</div>
  <div class="item">4</div>
</div>
    </textarea>
    <button onclick="runCode('code3', 'output3')">Run Code</button>
    <iframe id="output3"></iframe>

    <h3>IV. Auto-placement & Grid Areas</h3>
    <p><strong>Explanation:</strong> CSS Grid automatically items ko place karta hai agar aap manually jagah define na karo.<br>
    Grid Areas ka use karke hum naam se jagah define karke items ko uss area me daal sakte hain (like template design).</p>

    <textarea id="code4">
<style>
.grid {
  display: grid;
  grid-template-areas: 
    "header header"
    "sidebar main"
    "footer footer";
  grid-template-columns: 1fr 2fr;
  grid-template-rows: 60px 200px 60px;
  gap: 10px;
  background: #e8f5e9;
  padding: 10px;
}
.header {
  grid-area: header;
  background: #43a047;
}
.sidebar {
  grid-area: sidebar;
  background: #66bb6a;
}
.main {
  grid-area: main;
  background: #81c784;
}
.footer {
  grid-area: footer;
  background: #388e3c;
}
.box {
  color: white;
  padding: 15px;
  text-align: center;
  border-radius: 8px;
}
</style>
<div class="grid">
  <div class="box header">Header</div>
  <div class="box sidebar">Sidebar</div>
  <div class="box main">Main</div>
  <div class="box footer">Footer</div>
</div>
    </textarea>
    <button onclick="runCode('code4', 'output4')">Run Code</button>
    <iframe id="output4"></iframe>
  </div>

  <script>
    function runCode(textareaId, iframeId) {
      const code = document.getElementById(textareaId).value;
      const iframe = document.getElementById(iframeId);
      const doc = iframe.contentDocument || iframe.contentWindow.document;
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      doc.write(code);
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</body>
</html>