Adding background image in home-v2

function.php

if( ! function_exists( 'pizzaro_home_v2_hook_control' ) ) {
    function pizzaro_home_v2_hook_control() {
        if( is_page_template( array( 'template-homepage-v2.php' ) ) ) {
            remove_action( 'pizzaro_homepage_v2', 'pizzaro_revslider_v2',		isset( $home_v2['sdr']['priority'] ) ? intval( $home_v2['sdr']['priority'] ) : 20 );

            add_action( 'pizzaro_homepage_v2', 'pizzaro_v2_background_image',		isset( $home_v2['sdr']['priority'] ) ? intval( $home_v2['sdr']['priority'] ) : 20 );
        }
    }
}

if ( ! function_exists( 'pizzaro_v2_background_image' ) ) {
    /**
     * Displays site logo in header
     */
    function pizzaro_v2_background_image() {
        ?><header class="custom-pz section-product">
            <div class="section-input-inner">
                <h3 class="input-top-text">The #1 Selection of Foods in Caribbean</h3>
                <h2 class="input-title">SEARCH FOR FOOD AND RESTUARANT</h2>
                <form role="search" method="get" class="woocommerce-product-search-1" action="http://localhost/~ibrahim/pizzaro/">
                    <label class="screen-reader-text" for="woocommerce-product-search-field-0">Search for:</label>
                        <input type="search" id="woocommerce-product-search-field-1" class="search-field" placeholder="eg.shushi,pizza,chowmein,salad,fried chicken" value="" name="s">
                        <button type="submit" value="Search">Find Food</button>
                    <input type="hidden" name="post_type" value="product">
                </form>
                <h3 class="input-bottom-text">or browse from our most popular selection</h3>
            </div>
        </header><?php
    }
}

style.css

.custom-pz {
    background-image: url(https://placeholdit.co//i/1920x600?&bg=EBEBEC);height: 525px;background-size: cover;background-position: center center;display: flex;justify-content: center;align-items: center;
}
.custom-pz .woocommerce-product-search-1 {
    display: flex; justify-content: center; margin-bottom: 60px;
}
.custom-pz input#woocommerce-product-search-field-1 {
    border-radius: 1px; width: 70%;
}
.custom-pz .section-input-inner { 
    z-index: 2;text-align: center;
}
.custom-pz .input-title {
    margin-bottom: 50px;color: #fff;
}
.custom-pz .input-bottom-text{ 
    font-size: 24px;color: #fff;
}
.custom-pz .input-top-text { 
    color: #fff; margin-bottom: 27px; font-size: 18px;
}
.custom-pz button {
    border-radius: 0;padding: 13px; background-color: #c00a27;
}
.header-v2 .site-header-wrap {
    display: none;
}

@media (max-width: 767px) {
   .custom-pz .woocommerce-product-search-1 {
        flex-wrap: wrap;
        margin: 0 15px 60px;
    }

   .custom-pz input#woocommerce-product-search-field-1 {
        margin-bottom: 15px;
        width: 100%;
    }

   .custom-pz button {
        width: 100%;
        padding: 8px;
    }
}