/**
 * Mobile Navigation & Hamburger Menu (STEP 9)
 * PC → スマートフォン ハンバーガーメニュー細かい調整
 * 
 * @package Higashimatudo_Shika
 */

/* ============================================
   Mobile Navigation Refinements
   ============================================ */

/* ============================================
   Hamburger Menu - Mobile Only
   ============================================ */

@media (max-width: 767px) {
	/* Hamburger button positioning */
	.hamburger-menu {
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		width: 48px;
		height: 48px;
		min-width: 48px;
		min-height: 48px;
		padding: 0;
		background: transparent;
		border: none;
		cursor: pointer;
		margin-left: auto;
		margin-right: var(--spacing-sm);
		flex-shrink: 0;
		transition: all var(--transition-fast);
		z-index: 1000;
	}

	/* Hamburger lines */
	.hamburger-menu span {
		display: block;
		width: 26px;
		height: 3px;
		background-color: var(--color-text);
		margin: 5px 0;
		transition: all var(--transition-base);
		border-radius: 2px;
		transform-origin: center;
	}

	/* Hamburger hover effect */
	.hamburger-menu:hover {
		background-color: rgba(0, 102, 204, 0.08);
		border-radius: var(--radius-md);
	}

	.hamburger-menu:hover span {
		background-color: var(--color-primary);
	}

	/* Active hamburger animation */
	.hamburger-menu[aria-expanded="true"] span:nth-child(1) {
		transform: rotate(45deg) translate(12px, 12px);
		background-color: var(--color-primary);
	}

	.hamburger-menu[aria-expanded="true"] span:nth-child(2) {
		opacity: 0;
		background-color: var(--color-primary);
		transform: translateX(20px);
	}

	.hamburger-menu[aria-expanded="true"] span:nth-child(3) {
		transform: rotate(-45deg) translate(8px, -8px);
		background-color: var(--color-primary);
	}

	/* Focus state for hamburger */
	.hamburger-menu:focus {
		outline: 2px solid var(--color-primary);
		outline-offset: 2px;
	}

	.hamburger-menu:focus-visible {
		outline: 2px solid var(--color-primary);
		outline-offset: 2px;
	}

	/* Reduced motion support */
	@media (prefers-reduced-motion: reduce) {
		.hamburger-menu span {
			transition: none;
		}

		.hamburger-menu[aria-expanded="true"] span:nth-child(1),
		.hamburger-menu[aria-expanded="true"] span:nth-child(3) {
			transform: none;
		}
	}
}

/* ============================================
   Mobile Menu Container
   ============================================ */

@media (max-width: 767px) {
	.mobile-menu {
		display: none;
		position: fixed;
		top: 0;
		left: 0;
		width: 100%;
		height: 100%;
		background-color: var(--color-background);
		z-index: 999;
		overflow-y: auto;
		-webkit-overflow-scrolling: touch;
		transform: translateX(-100%);
		transition: transform var(--transition-base) ease-in-out;
		padding: 0;
		margin: 0;
	}

	/* Mobile menu when open */
	.mobile-menu.is-open {
		display: block;
		transform: translateX(0);
	}

	/* Overlay backdrop */
	body.mobile-menu-open::before {
		content: '';
		position: fixed;
		top: 0;
		left: 0;
		right: 0;
		bottom: 0;
		background-color: rgba(0, 0, 0, 0.5);
		z-index: 998;
		opacity: 1;
		transition: opacity var(--transition-fast);
	}

	/* Prevent body scroll when menu open */
	body.mobile-menu-open {
		overflow: hidden;
	}

	/* Mobile menu inner container */
	.mobile-menu .container {
		display: flex;
		flex-direction: column;
		gap: 0;
		padding: 0;
		max-width: 100%;
	}

	/* Mobile menu list */
	.mobile-menu .menu,
	.mobile-menu .mobile-nav-menu {
		display: flex;
		flex-direction: column;
		list-style: none;
		margin: 0;
		padding: 0;
		gap: 0;
		width: 100%;
	}

	/* Mobile menu items */
	.mobile-menu .menu-item {
		margin: 0;
		border-bottom: 1px solid var(--color-border-light);
		width: 100%;
	}

	.mobile-menu .menu-item:last-child {
		border-bottom: none;
	}

	/* Mobile menu links */
	.mobile-menu a {
		display: block;
		padding: 14px 16px;
		color: var(--color-text);
		text-decoration: none;
		font-size: 15px;
		font-weight: 500;
		transition: all var(--transition-fast);
		min-height: 44px;
		display: flex;
		align-items: center;
		border-left: 4px solid transparent;
	}

	/* Mobile menu link hover/active */
	.mobile-menu a:hover {
		background-color: var(--color-background-light);
		color: var(--color-primary);
		border-left-color: var(--color-primary);
	}

	/* Active page indicator */
	.mobile-menu .current-menu-item > a,
	.mobile-menu .menu-item.active > a {
		color: var(--color-primary);
		font-weight: 600;
		background-color: rgba(0, 102, 204, 0.05);
		border-left-color: var(--color-primary);
	}

	/* Focus state */
	.mobile-menu a:focus {
		outline: 2px solid var(--color-primary);
		outline-offset: -2px;
		background-color: rgba(0, 102, 204, 0.08);
	}

	.mobile-menu a:focus-visible {
		outline: 2px solid var(--color-primary);
		outline-offset: -2px;
	}
}

/* ============================================
   Mobile Submenu
   ============================================ */

@media (max-width: 767px) {
	/* Submenu container */
	.mobile-menu .sub-menu {
		display: none;
		flex-direction: column;
		list-style: none;
		margin: 0;
		padding: 0;
		background-color: rgba(0, 102, 204, 0.03);
		border-left: 4px solid var(--color-primary);
		gap: 0;
	}

	/* Show submenu when expanded */
	.mobile-menu .menu-item.is-expanded > .sub-menu {
		display: flex;
	}

	/* Submenu items */
	.mobile-menu .sub-menu li {
		margin: 0;
		border-bottom: 1px solid rgba(0, 102, 204, 0.1);
		width: 100%;
	}

	.mobile-menu .sub-menu li:last-child {
		border-bottom: none;
	}

	/* Submenu links */
	.mobile-menu .sub-menu a {
		padding-left: 40px;
		font-size: 14px;
		font-weight: 400;
		color: var(--color-text-light);
	}

	.mobile-menu .sub-menu a:hover {
		background-color: rgba(0, 102, 204, 0.08);
		color: var(--color-primary);
		padding-left: 44px;
	}

	.mobile-menu .sub-menu .current-menu-item > a {
		color: var(--color-primary);
		font-weight: 600;
		background-color: rgba(0, 102, 204, 0.08);
	}
}

/* ============================================
   Mobile Menu CTA Button
   ============================================ */

@media (max-width: 767px) {
	.mobile-menu-cta {
		padding: var(--spacing-lg);
		border-top: 1px solid var(--color-border-light);
		margin-top: auto;
		background-color: var(--color-background-light);
	}

	.mobile-menu-cta .button {
		width: 100%;
		min-height: 44px;
		padding: 12px 16px;
		font-size: 15px;
		font-weight: 600;
		border-radius: var(--radius-md);
		text-align: center;
		display: flex;
		align-items: center;
		justify-content: center;
	}

	.mobile-menu-cta .button:active {
		transform: scale(0.98);
	}
}

/* ============================================
   Header Adjustments for Mobile
   ============================================ */

@media (max-width: 767px) {
	.site-header {
		position: sticky;
		top: 0;
		z-index: 100;
		padding: 0;
		box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
	}

	.header-wrapper {
		position: relative;
	}

	.header-content {
		display: flex;
		align-items: center;
		justify-content: space-between;
		padding: 8px var(--spacing-md);
		gap: var(--spacing-md);
		min-height: 56px;
	}

	/* Logo sizing on mobile */
	.site-branding {
		display: flex;
		align-items: center;
		flex: 1;
		margin-right: 0;
		min-width: 0;
		overflow: hidden;
	}

	.site-branding img {
		max-width: 140px;
		max-height: 56px;
		height: auto;
		display: block;
	}

	.site-branding > a {
		display: flex;
		align-items: center;
		justify-content: center;
		width: 56px;
		height: 56px;
		padding: 0 !important;
	}

	.site-title {
		min-width: 0;
		max-width: 100%;
		font-size: 20px;
		line-height: 1.2;
		margin: 0;
		white-space: nowrap;
		overflow: hidden;
		text-overflow: ellipsis;
	}

	.site-title a {
		display: flex;
		align-items: center;
		padding: 0 !important;
	}

	.site-description {
		display: none;
	}

	/* Hide desktop navigation */
	.main-navigation {
		display: none;
	}

	/* Hide CTA button on mobile (optional) */
	.header-cta {
		display: none;
	}

	/* Navigation wrapper adjustment */
	.header-nav-wrapper {
		display: flex;
		align-items: center;
		gap: 0;
		flex: none;
	}
}

/* ============================================
   Tablet Adjustments (576px - 767px)
   ============================================ */

@media (min-width: 576px) and (max-width: 767px) {
	.site-branding img {
		max-width: 140px;
	}

	.site-title {
		font-size: 18px;
	}

	.mobile-menu {
		max-width: 100%;
	}

	.mobile-menu a {
		font-size: 16px;
		padding: 16px 18px;
	}

	.mobile-menu .sub-menu a {
		padding-left: 48px;
	}
}

/* ============================================
   Small Mobile (360px - 480px)
   ============================================ */

@media (max-width: 480px) {
	.hamburger-menu {
		width: 44px;
		height: 44px;
		min-width: 44px;
		min-height: 44px;
		margin-right: 0;
	}

	.hamburger-menu span {
		width: 22px;
		height: 2.5px;
		margin: 4px 0;
	}

	.site-branding img {
		max-width: 100px;
		max-height: 40px;
	}

	.site-branding > a {
		width: 40px;
		height: 40px;
	}

	.site-branding {
		max-width: calc(100% - 132px);
		gap: var(--spacing-xs);
	}

	.site-title {
		font-size: 14px;
		line-height: 1.2;
	}

	.header-content {
		min-height: 50px;
		padding: 6px var(--spacing-sm);
	}

	.mobile-menu a {
		padding: 12px 14px;
		font-size: 14px;
		min-height: 44px;
	}

	.mobile-menu-cta {
		padding: 12px;
	}

	.mobile-menu-cta .button {
		padding: 11px 14px;
		font-size: 14px;
	}
}

/* ============================================
   Portrait vs Landscape Optimization
   ============================================ */

@media (max-width: 767px) and (orientation: landscape) {
	.header-content {
		min-height: 48px;
		padding: 6px var(--spacing-md);
	}

	.site-branding img {
		max-width: 100px;
	}

	.mobile-menu {
		max-height: calc(100vh - 48px);
	}

	.mobile-menu a {
		padding: 10px 16px;
		min-height: 40px;
	}
}

/* ============================================
   Accessibility Improvements
   ============================================ */

@media (max-width: 767px) {
	/* High contrast mode support */
	@media (prefers-contrast: more) {
		.hamburger-menu span {
			height: 4px;
		}

		.mobile-menu a {
			border-left-width: 6px;
		}

		.mobile-menu .sub-menu {
			border-left-width: 6px;
		}
	}

	/* Reduced motion support */
	@media (prefers-reduced-motion: reduce) {
		.hamburger-menu span,
		.mobile-menu,
		.mobile-menu a {
			transition: none !important;
		}

		.hamburger-menu[aria-expanded="true"] span:nth-child(1),
		.hamburger-menu[aria-expanded="true"] span:nth-child(3) {
			transform: none;
		}

		.hamburger-menu[aria-expanded="true"] span:nth-child(2) {
			opacity: 0;
		}
	}

	/* Screen reader only - hide unless focused */
	.sr-only {
		position: absolute;
		width: 1px;
		height: 1px;
		padding: 0;
		margin: -1px;
		overflow: hidden;
		clip: rect(0, 0, 0, 0);
		white-space: nowrap;
		border-width: 0;
	}

	.sr-only:focus {
		position: static;
		width: auto;
		height: auto;
		overflow: visible;
		clip: auto;
		white-space: normal;
	}
}

/* ============================================
   Touch Device Optimizations
   ============================================ */

@media (max-width: 767px) and (hover: none) and (pointer: coarse) {
	/* Increase touch targets */
	.hamburger-menu {
		width: 48px;
		height: 48px;
		min-width: 48px;
		min-height: 48px;
	}

	.mobile-menu a {
		min-height: 48px;
		padding: 14px 16px;
	}

	/* Remove hover effects, add active states instead */
	.mobile-menu a:hover {
		background-color: var(--color-background);
	}

	.mobile-menu a:active {
		background-color: var(--color-background-light);
	}

	/* Disable hover for hamburger */
	.hamburger-menu:hover {
		background-color: transparent;
	}

	.hamburger-menu:active {
		background-color: rgba(0, 102, 204, 0.08);
	}
}

/* ============================================
   iOS Safari Specific Fixes
   ============================================ */

/* Prevent zoom on input */
@supports (-webkit-touch-callout: none) {
	@media (max-width: 767px) {
		.mobile-menu a {
			font-size: 16px;
		}

		/* Fix rubber band scroll on iOS */
		.mobile-menu {
			-webkit-overflow-scrolling: touch;
			overscroll-behavior: contain;
		}

		/* Safe area support for notch devices */
		@supports (padding: max(0px)) {
			.mobile-menu {
				padding-right: max(0px, env(safe-area-inset-right));
				padding-bottom: max(0px, env(safe-area-inset-bottom));
				padding-left: max(0px, env(safe-area-inset-left));
			}
		}
	}
}

/* ============================================
   Dark Mode Support
   ============================================ */

@media (prefers-color-scheme: dark) {
	@media (max-width: 767px) {
		.mobile-menu {
			background-color: var(--color-background);
		}

		.mobile-menu a {
			color: var(--color-text);
		}

		.mobile-menu a:hover {
			background-color: var(--color-background-light);
		}

		.mobile-menu .current-menu-item > a,
		.mobile-menu .menu-item.active > a {
			background-color: rgba(51, 133, 221, 0.1);
		}

		.hamburger-menu span {
			background-color: var(--color-text);
		}
	}
}

/* ============================================
   Performance - Smooth Scrolling
   ============================================ */

@media (max-width: 767px) {
	.mobile-menu {
		scroll-behavior: smooth;
		-webkit-overflow-scrolling: touch;
	}

	/* GPU acceleration */
	.hamburger-menu,
	.mobile-menu {
		will-change: transform;
	}
}