W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
  background: #f1f1f1;
}

/* The laptop with borders */
.laptop {
  -webkit-transform-origin: 0 0;
  transform-origin: 0 0;
  -webkit-transform: scale(.6) translate(-50%); /* Scaled down for a better Try-it experience (change to 1 for full scale) */
  transform: scale(.6) translate(-50%); /* Scaled down for a better Try-it experience (change to 1 for full scale) */
  left: 50%;
  position: absolute;
  width: 1366px;
  height: 800px;
  border-radius: 6px;
  border-style: solid;
  border-color: black;
  border-width: 24px 24px 80px;
  background-color: black;

}

/* The keyboard of the laptop */
.laptop:after {
  content: '';
  display: block;
  position: absolute;
  width: 1600px;
  height: 60px;
  margin: 80px 0 0 -110px;
  background: black;
  border-radius: 6px;
}

/* The top of the keyboard */
.laptop:before {
  content: '';
  display: block;
  position: absolute;
  width: 250px;
  height: 30px;
  bottom: -110px;
  left: 50%;
  -webkit-transform: translate(-50%);
  transform: translate(-50%);
  background: #f1f1f1;
  border-bottom-left-radius: 5px;
  border-bottom-right-radius: 5px;
  z-index: 1;
}

/* The screen (or content) of the device */
.laptop .content {
  width: 1366px;
  height: 800px;
  overflow: hidden;
  border: none;
}
</style>
</head>
<body>

</body>
</html>

​x
 
<!DOCTYPE html><html><head><meta name="viewport" content="width=device-width, initial-scale=1"><style>body {  background: #f1f1f1;}​/* The laptop with borders */.laptop {  -webkit-transform-origin: 0 0;  transform-origin: 0 0;  -webkit-transform: scale(.6) translate(-50%); /* Scaled down for a better Try-it experience (change to 1 for full scale) */  transform: scale(.6) translate(-50%); /* Scaled down for a better Try-it experience (change to 1 for full scale) */  left: 50%;  position: absolute;  width: 1366px;  height: 800px;  border-radius: 6px;  border-style: solid;  border-color: black;  border-width: 24px 24px 80px;  background-color: black;​}​/* The keyboard of the laptop */