CSS loader position

Is it possible to limit the vertical position from the top of tall elements?

HTML

<!-- loaders on short elements look great - all centred -->
<section>
    <div data-loader-overlay>
        <span data-loader></span>
    </div>
</section>


<!-- this is a loader placed on a very tall element -->
<!-- the dots might be off-screen -->
<!-- ideal: "no more than X pixels from the top" -->
<section style="height: 1000px;">
    <div data-loader-overlay>
        <span data-loader></span>
    </div>
</section>

SCSS

$loader-size: 0.5;
$loader-speed: 0.4s;
$loader-color: #008080;
$loader-radius: 100%;

[data-loader-overlay] {
	width: 100%;
	height: 100%;
	@include absolute(0, 0, 0, 0);
	z-index: 3;
	display: flex;
	justify-content: center;
	align-items: center;
	background: rgba(255,255,255,0.5);

	body > & {
		position: absolute;
    background: #333;
	}
}

[data-loader] {
	display: inline-block;
	border-radius: $loader-radius;
	margin-left: 0;
	width: 1em;
	height: 1em;
	transition-duration: $loader-speed;
	background-color: $loader-color;
	font-size: 1rem * $loader-size;
	position: relative;
	animation: loader ($loader-speed * 3) infinite;

	&:after,
	&:before {
		content: '';
		display: inline-block;
		border-radius: $loader-radius;
		margin-left: 0;
		width: 1em;
		height: 1em;
		animation: loader ($loader-speed * 3) infinite;
		transition-duration: $loader-speed;
		position: absolute;
		left: 150%;
		animation-delay: $loader-speed;
		background-color: $loader-color;
	}

	&:after {
		left: -150%;
		animation-delay: $loader-speed * 2;
	}
}

@keyframes loader {
	0% {
		background-color: $loader-color;
	}
	50% {
		background-color: lighten($loader-color, 5%);
	}
	100% {
		background-color: lighten($loader-color, 10%);
	}
}

















section {
    width: 45%;
    display: inline-block;
    vertical-align: top;
    height: 50px;
    position: relative;
    outline: 1px solid #ccc;
}