/**
 * Navigation Component
 * 
 * Complete navigation system including desktop and mobile
 */

/* ==========================================================================
   Site Header
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-color);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-sticky);
    transition: transform var(--transition-base), box-shadow var(--transition-base), height var(--transition-base);
    height: var(--header-height);
    transform: translateY(0);
}

.site-header.scrolled {
    height: calc(var(--header-height) - 10px);
    box-shadow: var(--shadow-md);
}

.header-container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-xl);
}

/* ==========================================================================
   Site Branding
   ========================================================================== */
.site-branding {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    z-index: 2;
}

.site-logo {
    display: block;
    max-height: 50px;
    transition: transform var(--transition-base);
}

.site-logo:hover {
    transform: scale(1.05);
}

.site-logo img {
    height: 50px;
    max-height: 50px;
    width: auto;
    display: block;
    object-fit: contain;
}

.site-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.site-title a {
    color: var(--text-color);
    text-decoration: none;
    transition: color var(--transition-base);
}

.site-title a:hover {
    color: var(--primary-color);
}

/* ==========================================================================
   Desktop Navigation
   ========================================================================== */
.main-navigation {
    display: flex;
    align-items: center;
    flex-grow: 1;
    justify-content: flex-end;
}

.primary-menu {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-xl);
}

.primary-menu > li {
    position: relative;
}

.primary-menu > li > a {
    display: flex;
    align-items: center;
    padding: var(--space-sm) 0;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: color var(--transition-base);
    position: relative;
}

.primary-menu > li > a:hover,
.primary-menu > li > a:focus {
    color: var(--primary-color);
}

/* Active/Current Menu Item */
.primary-menu > li.current-menu-item > a,
.primary-menu > li.current-menu-parent > a {
    color: var(--primary-color);
}

.primary-menu > li.current-menu-item > a::after,
.primary-menu > li.current-menu-parent > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
    transform: scaleX(1);
}

/* Hover Effect */
.primary-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.primary-menu > li > a:hover::after {
    transform: scaleX(1);
}

/* ==========================================================================
   Dropdown Menu
   ========================================================================== */
.primary-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-color);
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    padding: var(--space-sm) 0;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
    display: block;
}

.primary-menu li:hover > .sub-menu,
.primary-menu li:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sub-menu li {
    margin: 0;
    display: block;
    width: 100%;
}

.sub-menu a {
    display: block;
    padding: var(--space-sm) var(--space-lg);
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all var(--transition-base);
}

.sub-menu a:hover,
.sub-menu a:focus {
    background-color: var(--light-gray);
    color: var(--primary-color);
}

/* ==========================================================================
   CTA Button
   ========================================================================== */
.header-cta {
    margin-left: var(--space-xl);
}

.header-cta .cta-button {
    display: inline-flex;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.header-cta .cta-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   Mobile Menu Toggle
   ========================================================================== */
.mobile-menu-toggle {
    display: none;
    position: relative;
    min-width: 48px;
    min-height: 48px;
    width: 48px;
    height: 48px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: var(--z-modal);
    -webkit-tap-highlight-color: transparent;
    transition: opacity var(--transition-base);
    border-radius: 8px;
}

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

/* Hamburger Icon */
.hamburger {
    position: relative;
    width: 24px;
    height: 20px;
    display: inline-block;
    pointer-events: none;
}

.hamburger span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 2px;
    transition: all var(--transition-base);
    transform-origin: center;
    display: block;
}

.hamburger span:nth-child(1) {
    top: 0;
}

.hamburger span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger span:nth-child(3) {
    bottom: 0;
}

/* Active state */
.mobile-menu-toggle.is-active .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.is-active .hamburger span:nth-child(2) {
    opacity: 0;
    transform: translateY(-50%) scaleX(0);
}

.mobile-menu-toggle.is-active .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ==========================================================================
   Mobile Menu Modal
   ========================================================================== */
.mobile-menu-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-menu-modal.is-active {
    opacity: 1;
}

.mobile-menu-container {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--bg-color);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-base);
    overflow-y: auto;
    z-index: var(--z-modal);
}

.mobile-menu-modal.is-active .mobile-menu-container {
    right: 0;
}

/* Mobile Menu Header */
.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-color);
    transition: color var(--transition-base);
}

.mobile-menu-close:hover {
    color: var(--primary-color);
}

/* Mobile Menu Navigation */
.mobile-menu {
    list-style: none;
    margin: 0;
    padding: var(--space-lg);
}

.mobile-menu li {
    margin-bottom: var(--space-md);
}

.mobile-menu a {
    display: block;
    padding: var(--space-sm) 0;
    color: var(--text-color);
    text-decoration: none;
    font-size: 1.125rem;
    font-weight: 500;
    transition: color var(--transition-base);
}

.mobile-menu a:hover,
.mobile-menu a:focus {
    color: var(--primary-color);
}

.mobile-menu .current-menu-item > a {
    color: var(--primary-color);
}

/* Mobile Sub-menu */
.mobile-menu .sub-menu {
    list-style: none;
    margin: var(--space-sm) 0 0 var(--space-lg);
    padding: 0;
}

.mobile-menu .sub-menu a {
    font-size: 1rem;
    font-weight: 400;
}

/* Mobile CTA */
.mobile-menu-cta {
    padding: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.mobile-menu-cta .cta-button {
    display: block;
    width: 100%;
    padding: var(--space-md);
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-base);
}

.mobile-menu-cta .cta-button:hover {
    background-color: var(--primary-dark);
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */
@media (max-width: 1024px) {
    /* デスクトップナビゲーションを非表示 */
    .nav-wrapper {
        display: none;
    }
    
    /* モバイルメニューボタンを表示 */
    .mobile-menu-toggle {
        display: flex !important;
        align-items: center;
        justify-content: center;
    }
    
    /* ヘッダーCTAを非表示 */
    .header-cta {
        display: none;
    }
}

@media (max-width: 768px) {
    .site-header {
        height: var(--header-height-mobile);
    }
    
    .site-header.scrolled {
        height: var(--header-height-mobile);
    }
    
    .site-logo {
        max-width: 180px;
    }
    
    .site-logo img {
        height: 40px;
        max-height: 40px;
        width: auto;
        max-width: 100%;
        object-fit: contain;
    }
    
    .site-title {
        font-size: 1.25rem;
    }
    
    .mobile-menu-container {
        max-width: 100%;
    }
}

/* ==========================================================================
   Sticky Header Behavior
   ========================================================================== */
body.admin-bar .site-header {
    top: 32px;
}

@media (max-width: 782px) {
    body.admin-bar .site-header {
        top: 46px;
    }
}

/* Add padding to body to account for fixed header */
body {
    padding-top: var(--header-height);
}

@media (max-width: 768px) {
    body {
        padding-top: var(--header-height-mobile);
    }
}

/* ==========================================================================
   Accessibility
   ========================================================================== */
.menu-item a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Skip navigation link */
.skip-nav {
    position: absolute;
    top: -40px;
    left: 10px;
    background: var(--primary-color);
    color: white;
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: var(--z-tooltip);
}

.skip-nav:focus {
    top: 10px;
}