Astra_Customizer_Sanitizes::sanitize_responsive_typo( array|number $val )

		public static function sanitize_responsive_typo( $val ) {

			$responsive = array(
				'desktop'      => '',
				'tablet'       => '',
				'mobile'       => '',
				'desktop-unit' => '',
				'tablet-unit'  => '',
				'mobile-unit'  => '',
			);
			if ( is_array( $val ) ) {
				$responsive['desktop']      = ( isset( $val['desktop'] ) && is_numeric( $val['desktop'] ) ) ? $val['desktop'] : '';
				$responsive['tablet']       = ( isset( $val['tablet'] ) && is_numeric( $val['tablet'] ) ) ? $val['tablet'] : '';
				$responsive['mobile']       = ( isset( $val['mobile'] ) && is_numeric( $val['mobile'] ) ) ? $val['mobile'] : '';
				$responsive['desktop-unit'] = ( isset( $val['desktop-unit'] ) && in_array( $val['desktop-unit'], array( '', 'px', 'em', 'rem', '%' ) ) ) ? $val['desktop-unit'] : 'px';
				$responsive['tablet-unit']  = ( isset( $val['tablet-unit'] ) && in_array( $val['tablet-unit'], array( '', 'px', 'em', 'rem', '%' ) ) ) ? $val['tablet-unit'] : 'px';
				$responsive['mobile-unit']  = ( isset( $val['mobile-unit'] ) && in_array( $val['mobile-unit'], array( '', 'px', 'em', 'rem', '%' ) ) ) ? $val['mobile-unit'] : 'px';
			} else {
				$responsive['desktop'] = is_numeric( $val ) ? $val : '';
			}
			return $responsive;
		}