*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body{
  background: #778899;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}
.container{
  position: relative;
  width:0;
  height:0;
  background: linear-gradient(40deg, #ADD8E6 50%, #DDA0DD);
  border-radius: 25px;
  transition: .5s;
  display: flex;
  justify-content: center;
  align-items: center;
}
.container.active{
  width: 350px;
  height: 350px;
  transition-delay: .3s;
}
.container::before{
  content: '';
  position: absolute;
  bottom:-15px;
  width: 40px;
  height: 40px;
  background: #ADD8E6;
  border-radius: 5px;
  transform: rotate(45deg);
}
.container.active::before{
  transition-delay: .5s;
}
.container .content{
  min-width: 400px;
  padding: 40px;
  color: #fff;
  transition: .5s;
  opacity: 0;
  transform: scale(0);
  text-align: center;
  margin-bottom: 20px;
}
.container .content h2{
  margin-bottom: 30px;
}
.container.active .content{
  opacity: 1;
  transform: scale(1);
  transition-delay: .5s;
}
.toggle{
  position: absolute;
  bottom: -20px;
  min-width:60px;
  height:60px;
  border-radius: 50%;
  background: #90EE90;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: .3s;
}
.toggle::before{
  content: '+';
  font-size: 2.5em;
  color: #fff;
  cursor: pointer;
}
.container.active .toggle{
  bottom: -85px;
  transform: rotate(135deg);
  background: #FA8072;
}