I am trying to soften those sharp edges of the orange div when sub divs got overflown as I scroll down. Can I do that with CSS? Sorry if my explanation is confusing.
I've mad you an example, you can add box-shadow
to the header and the footer and in that way you can create a blur effect between your elements.
body{
background-color: #888888;
}
header{
width: 100%;
height: 50px;
box-shadow: 0 10px 8px 10px #888888;
background-color: #888888;
/* this is important so the box-shadow is displayd on top of the next element */
position: relative;
z-index: 1
}
div{
width: 100%;
height: 100px;
background-color: red;
}
<body>
<header></header>
<div> </div>
</body>