Динамичная тень без box-shadow

Создаём тень без использования свойства box-shadow, на основе цветов самого элемента.

by Andrey Dobrovoi

HTML

<div class="dynamic-shadow"></div>

CSS

*,
:after,
:before {
  box-sizing: inherit;
}

body,
html {
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

.dynamic-shadow {
  position: relative;
  width: 15rem;
  height: 15rem;
  background: #ddd444;
  z-index: 1;
}
.dynamic-shadow::after {
  content: '';
  width: 100%;
  height: 100%;
  position: absolute;
  background: inherit;
  top: 0.6rem;
  left: 0.4rem;
  filter: blur(0.4rem);
  opacity: 0.8;
  z-index: -1;
}

JavaScript

/* ========================================================================= */
/*	shurawi --- dbmast.ru ---
/* ========================================================================= */