/* Change Style for Logo in AMP mode (Text Logo) */
function change_style_for_text_logo_in_amp() {
	?>
	.amp-wp-header .jeg_mobile_logo {
		background-image: unset;
		font-size: 24px;
		color: grey;
		margin-top: 14px;
	}
	@media
	only screen and (-webkit-min-device-pixel-ratio: 2),
	only screen and (     -o-min-device-pixel-ratio: 2/1),
	only screen and (        min-device-pixel-ratio: 2),
	only screen and (                min-resolution: 192dpi),
	only screen and (                min-resolution: 2dppx) {
		.amp-wp-header .jeg_mobile_logo {
			background-image: unset;
		}
	}
	<?php
}
add_action( 'amp_post_template_css', 'change_style_for_text_logo_in_amp' );