<div class="card">
  <p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Maiores cum quibusdam sint consequatur nobis qui obcaecati impedit facilis aliquam vero itaque dignissimos, temporibus laudantium aperiam quam quisquam ducimus facere adipisci?</p>
</div>
<div class="card">
  <p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Maiores cum quibusdam sint consequatur nobis qui obcaecati impedit facilis aliquam vero itaque dignissimos, temporibus laudantium aperiam quam quisquam ducimus facere adipisci?</p>
</div>

@import url("https://fonts.googleapis.com/css?family=Cabin:400,700&subset=latin-ext");
///// Variables
$body-bgc: lightblue;
$card-bgc: #3b3a36;
$card-color: snow;
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-color: $body-bgc;
  padding: 1rem;
}
.card {
  max-width: 500px;
  margin: 2rem auto;
  background-color: $card-bgc;
  padding: 2rem;
  position: relative;
}
.card:before,
.card:after,
p:before,
p:after {
  content: "";
  display: block;
  width: 2rem;
  height: 2rem;
  background-color: lightblue;
  position: absolute;
}
.card:before {
  top: 0;
  left: 0;
  border-bottom-right-radius: 100%;
  box-shadow: -1px -1px $body-bgc;
}
.card:after {
  bottom: 0;
  right: 0;
  border-top-left-radius: 100%;
  box-shadow: 1px 1px $body-bgc;
}
p {
  //position: relative;
  padding: 0.3rem;
  font-family: "Cabin", sans-serif;
  font-size: 1.1rem;
  line-height: 1.35;
  color: $card-color;
}
p:before {
  top: 0;
  right: 0;
  border-bottom-left-radius: 100%;
  box-shadow: 1px -1px $body-bgc;
}
p:after {
  bottom: 0;
  left: 0;
  border-top-right-radius: 100%;
  box-shadow: -1px 1px $body-bgc;
}