css-series/18-CSS Variables (Custom Properties).html at main · jdcodebase/css-series · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>18 - CSS Variables (Custom Properties)</title>

    <style>
      /* Reset default browser styles */
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }

      /* Global CSS Variables */
      :root {
        --primary-color: #abe622;
        --padding: 16px;
      }

      /* Button styling using global variables */
      button {
        background-color: var(--primary-color);
        padding: var(--padding);
        color: white;
        border: none;
        cursor: pointer;
      }

      /* Card component with local variables */
      .card {
        --card-bg: #c92828;
        --heading-bg: #c0bd18;

        background-color: var(--card-bg);
        padding: 20px;
        margin-top: 20px;
      }

      /* Heading uses variable from parent (.card) */
      .card1 {
        background-color: var(--heading-bg);
        padding: 10px;
        color: #000;
      }
    </style>
  </head>

  <body>
    <button>Click me</button>

    <div class="card">
      Card
      <h1 class="card1">Card1</h1>
    </div>
  </body>
</html>