Double curved shape

Considering :

  • the amount of code needed
  • the hassle of aligning double curves

CSS doesn’t seem to be the way to go here and SVG way more appropriate. To illustrate, see these two snippets :

SVG

DEMO

/*** FOR THE DEMO **/
svg{
    display:block;
    width:70%;
    margin:0 auto;
    opacity:0.8;
}
body{
    background: url('http://lorempixel.com/output/people-q-g-640-480-7.jpg');
    background-size:cover;
}
<svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 100 80">
    <path stroke-width="1" stroke="#000" fill="grey" d="M95 5 Q70 20 70 38 T50 65 Q55 50 30 40 T5 5z"/>
</svg>

CSS

DEMO (consider I only made one double curve on the right side of the shape)

.ghost {
  position: relative;
  width: 400px;
  height: 300px;
  margin: 0 auto;
  overflow: hidden;
}
.ghost:before,
.ghost:after {
  content: '';
  position: absolute;
}
.ghost:before {
  bottom: 0;
  right: 50%;
  width: 70%;
  height: 30%;
  transform-origin: 100% 100%;
  transform: skewY(30deg) rotate(20deg);
  box-shadow: -100px -100px 0px 99px #656565;
  border-top-right-radius: 30% 100%;
}
.ghost:after {
  top: 0;
  right: 0;
  transform-origin: 100% 0;
  transform: skewX(-10deg) rotate(-20deg);
  box-shadow: none;
  height: 107px;
  width: 173px;
  border-top-left-radius: 90% 100%;
  box-shadow: -30px -30px 0px 29px #656565, 60px -110px 0px 109px #656565;
}
<div class="ghost">
</div>

Note that I didn’t list out the advantages of using an svg in this case (responsiveness, quality of output, curve control, border, border color/opacity, fill colour/opacity, transparency, maintainability, amount of time to build the shape…)

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