Add Astra child theme for Hop On Hop Off header & footer

- disables Astra header/footer via astra_header/astra_footer hooks and renders
  custom design markup (logo, nav dropdown, footer columns, socials, support)
- chrome.css scoped to .hoho (generated from the design source); chrome.js for
  burger/submenu/sticky/back-to-top; bundled icon sprite (reuses plugin's)
- parameterize scope-css.js scope via VC_SCOPE env

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J4hNL1PSHxXbu94SCenpKj

astra-child-hoponhopoff/inc/header.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * Custom site header — "Hop On Hop Off" design. Rendered on the `astra_header`
+ * hook in place of Astra's default header. Wrapped in .hoho so assets/chrome.css
+ * (scoped to .hoho) applies without touching the rest of Astra.
+ */
+defined( 'ABSPATH' ) || exit;
+
+$hoho_archive = get_post_type_archive_link( 'viator_tour' );
+$hoho_archive = $hoho_archive ? $hoho_archive : home_url( '/' );
+?>
+<div class="hoho">
+	<header class="site-header" id="siteHeader">
+		<div class="container header__inner">
+			<div class="header__left">
+				<?php echo hoho_logo(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
+
+				<nav class="nav" id="primaryNav" aria-label="<?php echo esc_attr__( 'Primary', 'hoponhopoff' ); ?>">
+					<?php
+					wp_nav_menu(
+						array(
+							'theme_location' => 'hoho_primary',
+							'container'      => false,
+							'items_wrap'     => '<ul class="nav__list">%3$s</ul>',
+							'walker'         => new Hoho_Nav_Walker(),
+							'fallback_cb'    => 'hoho_nav_fallback',
+							'depth'          => 2,
+						)
+					);
+					?>
+				</nav>
+			</div>
+
+			<div class="header__actions">
+				<button class="icon-btn" type="button" aria-label="<?php echo esc_attr__( 'Search', 'hoponhopoff' ); ?>">
+					<?php echo hoho_icon( 'search', 'icon--24' ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
+				</button>
+				<a class="icon-btn" href="<?php echo esc_url( wp_login_url() ); ?>" aria-label="<?php echo esc_attr__( 'Account', 'hoponhopoff' ); ?>">
+					<?php echo hoho_icon( 'user', 'icon--24' ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
+				</a>
+				<a class="btn btn--accent header__cta" href="<?php echo esc_url( $hoho_archive ); ?>">
+					<span><?php echo esc_html__( 'Book now', 'hoponhopoff' ); ?></span>
+					<?php echo hoho_icon( 'arrow-right' ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
+				</a>
+				<button class="burger" id="burger" type="button" aria-label="<?php echo esc_attr__( 'Open menu', 'hoponhopoff' ); ?>" aria-expanded="false" aria-controls="primaryNav">
+					<span></span><span></span><span></span>
+				</button>
+			</div>
+		</div>
+	</header>
+</div>