Create widget areas to use with Display Featured Image for Genesis.

functions.php

<?php

// Do not include the opening tag!

add_action( 'after_setup_theme', 'leaven_register_featured_image_sidebars' );
/**
 * Register sidebars for the Display Featured Image for Genesis overlay area.
 * One is specific to the front page, the other is site-wide.
 *
 * @author Robin Cornett
 */
function leaven_register_featured_image_sidebars() {
	$sidebars = array();
	if ( class_exists( 'Display_Featured_Image_Genesis' ) ) {
		$sidebars[] = array(
			'id'          => 'over-image-home',
			'name'        => __( 'Featured Image Overlay (Front Page)', 'leaven' ),
			'description' => __( 'This widget area overlays the featured image, but only on the front page.', 'leaven' ),
		);
		$sidebars[] = array(
			'id'          => 'over-image',
			'name'        => __( 'Featured Image Overlay', 'leaven' ),
			'description' => __( 'This widget area overlays the featured image.', 'leaven' ),
		);
	}

	foreach ( $sidebars as $sidebar ) {
		genesis_register_sidebar( $sidebar );
	}
}

add_action( 'display_featured_image_genesis_before_title', 'leaven_featured_image_widget_area' );
/**
 * Add the featured image widget areas to the featured image, if they are active.
 *
 * @uses leaven_do_sidebar
 * @author Robin Cornett
 */
function leaven_featured_image_widget_area() {
	$widget_area = 'over-image';
	if ( is_front_page() && is_active_sidebar( 'over-image-home' ) ) {
		$widget_area = 'over-image-home';
	}
	leaven_print_sidebar( $widget_area );
}

/**
 * Outputs the sidebar/widget area to the site. No internal wrap is added.
 *
 * @param $sidebar Which sidebar to be checked and output (required).
 * @param string $class Add an extra class to the sidebar (optional). Otherwise,
 *                      the class used will be the name of the sidebar.
 *
 * @author Robin Cornett
 */
function leaven_print_sidebar( $sidebar, $class = '' ) {
	if ( ! is_active_sidebar( $sidebar ) ) {
		return;
	}
	$area_class = $sidebar;
	if ( ! empty( $class ) ) {
		$area_class .= ' ' . $class;
	}
	genesis_widget_area( $sidebar, array(
		'before' => '<div class="' . $area_class . '">',
		'after'	 => '</div>',
	) );
}

style.css

/* ## Search Form
-------------------------------------------- */

.search-form input[type="search"] {
  margin-right: 5px;
  width: -webkit-calc(100% - 63px);
  width: calc(100% - 63px);
}

.search-form button[type="submit"] {
  background-color: #292c33;
  border: 1px solid #fff;
  border-radius: 3px;
  color: #fff;
  height: 58px;
  padding: 0;
  width: 58px;
}

.search-form button[type="submit"]:after {
  display: inline-block;
  font: normal normal normal 18px FontAwesome;
  text-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-transform: translate(0, 0);
  -ms-transform: translate(0, 0);
  transform: translate(0, 0);
  content: '\f002';
}

.search-form button[type="submit"]:active, .search-form button[type="submit"]:focus, .search-form button[type="submit"]:hover {
  background-color: #de2f25;
}


/* ## Display Featured Image for Genesis
-------------------------------------------- */
.big-leader {
  max-height: 800px;
}

.big-leader .wrap {
  top: 40px;
}

.big-leader .entry-title.featured-image-overlay,
.big-leader .archive-title.featured-image-overlay {
  bottom: 0;
  font-size: 2.5em;
  right: 0;
  left: 0;
  position: absolute;
}

/* ## Featured Image Overlay
-------------------------------------------------- */
.over-image .widget_search input[type="search"] {
  background-color: #fff;
  background-color: rgba(255, 255, 255, 0.6);
}

.over-image .widget_search button[type="submit"] {
  background-color: #292c33;
}