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CSS - box-shadow
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  bottom-only drop shadow using a pseudo-element

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/2/ (opens new window)

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  background-color: #1c90f3;
  width: 200px;
  height: 100px;
  margin: 50px;
}

.box_shadow:after {
  content: "";
  width: 190px;
  height: 1px;
  margin-top: 98px;
  margin-left: 5px;
  display: block;
  position: absolute;
  z-index: -1;
  -webkit-box-shadow: 0px 0px 8px 2px #444444;
  -moz-box-shadow: 0px 0px 8px 2px #444444;
  box-shadow: 0px 0px 8px 2px #444444;
}

enter image description here (opens new window)
  drop shadow

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/ (opens new window)

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  -webkit-box-shadow: 0px 0px 10px -1px #444444;
  -moz-box-shadow: 0px 0px 10px -1px #444444;
  box-shadow: 0px 0px 10px -1px #444444;
}
  inner drop shadow

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  background-color: #1c90f3;
  width: 200px;
  height: 100px;
  margin: 50px;
  -webkit-box-shadow: inset 0px 0px 10px 0px #444444;
  -moz-box-shadow: inset 0px 0px 10px 0px #444444;
  box-shadow: inset 0px 0px 10px 0px #444444;
}

Result:

enter image description here (opens new window)

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/1/ (opens new window)
  multiple shadows

JSFiddle: https://jsfiddle.net/UnsungHero97/80qod7aL/5/ (opens new window)

HTML

<div class="box_shadow"></div>

CSS

.box_shadow {
  width: 100px;
  height: 100px;
  margin: 100px;
  box-shadow: -52px -52px 0px 0px #f65314, 52px -52px 0px 0px #7cbb00,
    -52px 52px 0px 0px #00a1f1, 52px 52px 0px 0px #ffbb00;
}

multiple shadows (opens new window)

Syntax

  • box-shadow: none|h-shadow v-shadow blur spread color |inset|initial|inherit;

    • Parameters

    Parameters Details
    inset by default, the shadow is treated as a drop shadow. the inset keyword draws the shadow inside the frame/border.
    offset-x the horizontal distance
    offset-y the vertical distance
    blur-radius 0 by default. value cannot be negative. the bigger the value, the bigger and lighter the shadow becomes.
    spread-radius 0 by default. positive values will cause the shadow to expand. negative values will cause the shadow to shrink.
    color can be of various notations: a color keyword, hexadecimal, rgb(), rgba(), hsl(), hsla()

    Remarks

    Browser Support:

    • Chrome 10.0
    • IE 9.0
    • Firefox 4.0 3.5 -moz
    • Safari 5.1 3.1 -webkit-
    • Opera 10.5
    		 

    Read Article
    https://develop.horje.com/learn/1434/reference

     

    Horje