@import url('https://fonts.googleapis.com/css?family=Quicksand&display=swap');
*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}
h3{
    font-family:Quicksand;
}
.alert{
  width:50%;
  margin:20px auto;
  padding:30px;
  position:relative;
  border-radius:5px;
  box-shadow:0 0 15px 5px #ccc;
}
.close{
  position:absolute;
  width:30px;
  height:30px;
  opacity:0.5;
  border-width:1px;
  border-style:solid;
  border-radius:50%;
  right:15px;
  top:25px;
  text-align:center;
  font-size:1.6em;
  cursor:pointer;
}
@mixin alert($name,$bgColor){
  $accentColor:darken($bgColor,50);
  .#{$name}{
    background-color:#{$bgColor};
    border-left:5px solid $accentColor;
    .close{
      border-color:$accentColor;
      color:$accentColor;
    }
  }
}
@include alert(simple-alert,#ebebeb);
@include alert(success-alert,#a8f0c6);
@include alert(danger-alert,#f7a7a3);
@include alert(warning-alert,#ffd48a);

$(".close").click(function() {
  $(this)
    .parent(".alert")
    .fadeOut();
});