body { margin: 10px; padding: 0; font-family: Arial; font-size: 12px; background: #E6F7D4; }
.proxy { border: 1px dotted black; }

h2 { padding: 5px; margin: 5px; border-bottom: 2px solid #bbb; line-height: 7px; font-size: 14px; margin-top: 20px; margin-bottom: 0px; color: #333; }
.playground { background: #fff; margin-left: 5px; margin-right: 5px; position: relative; padding: 10px; }
.example { width: 200px; height: 100px; background: #fff; position: relative; }