<?php
if ( is_front_page() )
{
    if ( get_header_image() )
    {
        // So, so good!
        $custom_header_attachment_id = get_custom_header()->attachment_id;
        $custom_header_image_alt = trim( strip_tags( get_post_meta(
            $custom_header_attachment_id,
            '_wp_attachment_image_alt',
            true
        ) ) );
?>
    <div class="header__featured-image-container">
        <?php
        $args = [
            // 'class' => 'header__featured-image',
            // 'alt'   => $custom_header_image_alt
        ];

        echo get_header_image_tag( $args );
        ?>
    </div>
<?php
    }
}
?>

<?php
function ivana_custom_header_setup()
{
    add_theme_support( 'custom-header', apply_filters( 'ivana_custom_header_args', [
        'default-image'      => '',
        'default-text-color' => '000',
        'width'              => '1000',
        'height'             => '250',
        'flex-width'         => true,
        'flex-height'        => true,
        'wp-head-callback'   => 'ivana_header_style'
    ] ) );
}
add_action( 'after_setup_theme', 'ivana_custom_header_setup' );

function ivana_header_style()
{
    $header_text_color = get_header_textcolor();

    if ( get_theme_support( 'custom-header', 'default-text-color' ) )
    {
?>
        <style type="text/css">
        <?php
        if ( ! display_header_text() )
        {
        ?>
            .site-title,
            .site-description {
                position: absolute;
                /* This is a nice approach, haven't thought about it! */
                clip: rect(1px, 1px, 1px, 1px);
            }
        <?php
        }
        else
        {
        ?>
            .site-title a,
            .site-description {
                color: <?php echo esc_attr( $header_text_color ); ?>;
            }
        <?php } ?>
        </style>
<?php
    }
}