.form-img {
  height: 100vh;
  max-height: 438px;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.form-narrow {
  max-width: 640px;
}




.diameter_table{
width:100%;
border-collapse:collapse;
margin-top:15px;
}

.diameter_table th,
.diameter_table td{
border:1px solid #e5e5e5;
padding:5px 10px;
text-align:center;
}
 

body .diameter_table input[type="text"]{
    padding: 2px 14px 0px;
    width: 100%;
    height: 30px;
}

.diameter_table th{
background:#f7f7f7;
font-weight:600;
}

.diameter-row.disabled{
opacity:0.45;
}

.diameter-row input[type=text]{
	width:100%;
	max-width:120px;
	margin:auto;
}

@media(max-width:700px){

	.diameter_table thead{
	display:none;
	}
	
	.diameter_table tr{
	display:block;
	border:1px solid #eee;
	margin-bottom:10px;
	padding:10px;
	}
	
	.diameter_table td{
	display:flex;
	justify-content:space-between;
	border:none;
	padding:5px 0;
	}

}