#txtList {
	font-size:14px;
	height:20px;
	border-bottom:none;
}
#txtResult {
	font-size:16px;
	font-weight:bold;
	color:dimgray;
	height:30px;
	border-top:none;
}
.calc-inner {
	margin:0 auto;
	border:1px solid darkgray;
	width:280px;
	padding:8px;
}
.result,.op-number {
	margin:0 auto;
	width:280px;
}
.result>input {
	width:280px;
	text-align:right;
	border:1px solid gray;
	display:block;
	padding-right:6px;
	box-sizing:border-box;
}
ul,li {
	margin:0;
	padding:0;
}
li {
	list-style:none;
}
.op-number {
	margin-top:10px;
}
.op-number li {
	float:left;
	padding:5px;
}
.op-number>ul::after {
	content:"";
	display:block;
	height:0;
	overflow:hidden;
	font-size:0;
	clear:both;
}
.op-number li>input {
	width:60px;
	height:42px;
	line-height:28px;
}