.pdf-frame {
	width: calc(100vw - 240px); /* 200px navbar + 40px extra ruimte */
	max-width: 1200px;
	min-width: 300px;
	display: block;
	margin: 30px 0 30px 20px; 
	border: 1px solid #ccc;
	border-radius: 8px;
	background: #fff;
	box-sizing: border-box;
	transition: width 0.2s;
}