html, body {
   background: #fff;
   color: #000;
   font-family: 'Karla', sans-serif;
   font-size: 16px;
   height: 100%;
}

img {
   height: auto;
   max-width: 100%;
   width: 100%;
}

.relative {
  position: relative;
  top: 100px;
}

.absolute {
  position: absolute;
  top: 30px;
}

.absolute__window {
  position: absolute;
  top: 200%;
  transition: all 5s 2s ease-in-out;
}

.border__dotted {
  border: 2px dotted #000;
}

.border__red {
  border: 2px solid red;
}

.border__blue {
  border: 2px solid blue;
}

.border__green {
  border: 2px solid green;
}

.active {
  background-color: green;
}