body{display: block;
		background: lightgreen;}

		#header{
			height: 40px;
			width: 312px;
			margin: auto;
			color: blue;
		}
		h2{text-align: center;
			position: relative;
			top: 0px;}
		footer{
			margin: auto;
			width: 400px;
			text-align: center;
			margin: auto;
			font-style: italic;
		}
		#displ{
			width: 312px;
			height: 90px;
			background: lightgrey;
			border: solid 1.5px;
			border-color: darkgrey;
			border-radius: 7px;
			box-shadow: inset 0px 0px 10px rgba(0,0,0,0.9);
			font-size: 30px;
			text-align: right;
			margin: auto;
		}
		#displ1, #displ2{
			position: relative;
			top: 5px;
			left: 5px;
			width: 300px;
			height: 38px;
			background: lightgrey;
			font-size: 30px;
			text-align: right;
			/*margin: auto;*/
		}

		button{
			width: 75px;
			height: 75px;
			border-radius: 7px;
			border: solid 1.5px;
			border-color: darkgrey;
			box-shadow: inset 0px 0px 10px rgba(0,0,0,0.9);
			font-size: 30px;
		}

		#but_form0{
			height: 79px;
			width: 314px;
			/*border: solid;*/
			margin: auto;
		}

		#but_form{/*position: absolute;
			top: 230px;*/
			height: 314px;
			width: 314px;
			/*border: solid;*/
			margin: auto;
		}
		#btn_delete{position: relative; top: 0px;}
		#btn_pow{position: relative; top: 4px;}
		#btn_plus_minus{position: relative; top: 0px;}
		#btn_sqr{position: relative; top: 0px;}

		#btn7{position: relative; top: 4px;	}
		#btn8{position: relative; top: 4px;	}
		#btn9{position: relative; top: 4px;	}
		#btnplus{position: relative; top: 4px;}

		#btn4{position: relative; top: 8px;}
		#btn5{position: relative; top: 8px;}
		#btn6{position: relative; top: 8px;}
		#btnminus{position: relative; top: 8px;}

		#btn1{position: relative; top: 12px;}
		#btn2{position: relative; top: 12px;}
		#btn3{position: relative; top: 12px;}
		#btnmultiple{position: relative; top: 12px;}
		
		#btncoma{position: relative; top: 16px;}
		#btn0{position: relative; top: 16px;}
		#btndivide{position: relative; top: 16px;}
		#btnequilse{position: relative; top: 16px;}