<div class="container">
  <div class="angle"></div>
  <div class="content">
    Kill designer<br>
    Kill designer<br>
    Kill designer<br>
    Kill designer<br>
    Kill designer<br>
    Kill designer<br>
  </div>
</div>

.container{
  margin: 20px;
  width: 300px;
  box-shadow: 0 0 6px rgba(0,0,0,0.3);
  border-radius: 20px;
  position: relative;
  box-sizing: border-box;
  background: #fff0c5;
}
.container .content{
  padding: 20px 36px;
  position: relative;
  z-index: 2;
}
.container:after{
  content: "";
  position: absolute;
  top: 50%;
  left: -43px;
  width: 30px;
  height: 30px;
  border-radius: 0px;
  transform: rotate(45deg) translateY(-50%);
}
.container .angle{
  position: absolute;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.container .angle:after{
  content: "";
  position: absolute;
  top: 50%;
  left: -30px;
  width: 30px;
  height: 30px;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
  border-top-right-radius: 4px;
  transform: rotate(45deg) translateY(-50%);
  box-sizing: border-box;
}

.container:hover:before{
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  border: solid 2px red;
  border-radius: 20px;
  box-sizing: border-box;
}
.container:hover .angle:after{
  border: solid 2px red;
}

body,.container .angle:after{
  background: #dae2ff;
}
.container:after{
  box-shadow: 0 0 6px 2px #dae2ff, 0 0 10px 4px #dae2ff, 0 0 2px 4px #dae2ff, 0 0 4px 5px #dae2ff;
  background: #dae2ff;
}