Shadow underlayer

by Vallek

HTML

<div class="content"></div>

CSS

body {
  margin: 0;
  width: 100vw;
  min-height: 100vh;
  background-color: hsl(204 29% 97%);
}

.content {
  position: relative;
  margin-left: auto;
  width: 50vw;
  min-height: 100vh;
  background-color: hsl(204 29% 97%);
}

.content::before {
  content: "";
  position: absolute;
  left: 0px;
  top: 5px;
  z-index: -1;
  width: 24px;
  height: 270px;
  border-radius: 50%;
  box-shadow: -6px 0 4px 0px hsla(0, 0%, 45%, 0.5);
}