#divElement			{ border: 1px solid #ff0000; padding: 20px; margin-bottom: 10px; }
#hideShowDivElement		{ width: 150px; height: 30px; }

#wrapper			{ width: 100%; border: 1px solid #000000; margin-bottom: 10px; }
#firstBlock			{ width: 50%; height: 20px; background-color: #ffe0e0; border: 1px solid #ff0000; box-sizing: border-box; }
#secondBlock			{ width: 100%; height: 20px; background-color: #e0ffe0; border: 1px solid #00ff00; box-sizing: border-box; }