1.transparency{
2 background-color: rgba(255, 255, 0, 0.3); /* <-- this line is modified */
3 display: block;
4 margin: 0 auto;
5 width: 300px;
6 height: 500px;
7}
8.content{
9 color: #000;
10 text-align: center;
11}
12img{
13 /* Set rules to fill background */
14 min-height: 100%;
15 min-width: 1920px;
16 /* Set up proportionate scaling */
17 width: 100%;
18 height: auto;
19 /* Set up positioning */
20 position: fixed;
21 top: 0;
22 left: 0;
23 z-index:-1; /* <-- this line is added */
24}
25