/**
 * Navigation Submenu Styles
 * Modern CSS for dropdown menus with best practices
 */

/* CSS Custom Properties for easy customization */
:root {
    --submenu-bg: #ffffff;
    --submenu-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    --submenu-item-hover-bg: #f5f5f5;
    --submenu-item-color: #333333;
    --submenu-item-hover-color: #000000;
    --submenu-border-radius: 12px;
    --submenu-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --submenu-min-width: 240px;

    /* Header styling */
    --header-bg: rgba(255, 255, 255, 0.95);
    --header-backdrop-blur: 10px;
    --header-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);

    /* Backdrop overlay */
    --backdrop-bg: rgba(0, 0, 0, 0.3);
    --backdrop-blur: 4px;
}

/* ========================================
   HEADER IMPROVEMENTS
   ======================================== */

/* Enhanced header with backdrop blur and shadow */
.header {
    background: var(--header-bg) !important;
    backdrop-filter: blur(var(--header-backdrop-blur));
    -webkit-backdrop-filter: blur(var(--header-backdrop-blur));
    box-shadow: var(--header-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

/* Sticky header on scroll - more opaque */
.header.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

/* ========================================
   BACKDROP OVERLAY FOR SUBMENU FOCUS
   ======================================== */

/* Backdrop overlay - hidden by default */
.nav-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--backdrop-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 999;
    /* Below header but above content */
    pointer-events: none;
}

/* Show backdrop when submenu is open */
.header__nav-list>.menu-item-has-children:hover~.nav-backdrop,
.header__nav-list>.menu-item-has-children:focus-within~.nav-backdrop,
body.submenu-open .nav-backdrop {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   DESKTOP NAVIGATION SUBMENU STYLES
   ======================================== */

/* Parent menu item with submenu */
.header__nav-list>.menu-item-has-children {
    position: relative;
}

/* Submenu container - hidden by default */
.header__nav-list .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: var(--submenu-min-width);
    max-width: min(92vw, 360px);
    max-height: min(70vh, 480px);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    background: var(--submenu-bg);
    box-shadow: var(--submenu-shadow);
    border-radius: var(--submenu-border-radius);
    padding: 8px 0;
    margin: 0;
    /* Без зазора: иначе hover мигает между пунктом и меню */
    margin-top: 0;
    padding-top: 8px;
    list-style: none;

    /* Hidden state */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--submenu-transition);

    /* CRITICAL: High z-index to appear above banner and other content */
    z-index: 10000;

    /* Add subtle border */
    border: 1px solid rgba(0, 0, 0, 0.06);
}

/* Невидимый мост на случай отступа у анимации */
.header__nav-list > .menu-item-has-children > .sub-menu::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: -12px;
    height: 12px;
}

/* Show submenu on hover */
.header__nav-list>.menu-item-has-children:hover>.sub-menu,
.header__nav-list>.menu-item-has-children:focus-within>.sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Submenu items */
.header__nav-list .sub-menu li {
    margin: 0;
    padding: 0;
    list-style: none;
}

/* Submenu links */
.header__nav-list .sub-menu a {
    display: block;
    padding: 14px 24px;
    color: var(--submenu-item-color);
    text-decoration: none;
    font-size: 15px;
    line-height: 1.5;
    transition: var(--submenu-transition);
    white-space: normal;
    position: relative;
}

/* Add subtle left border on hover */
.header__nav-list .sub-menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

/* Submenu link hover state */
.header__nav-list .sub-menu a:hover,
.header__nav-list .sub-menu a:focus {
    background: var(--submenu-item-hover-bg);
    color: var(--submenu-item-hover-color);
    padding-left: 28px;
}

.header__nav-list .sub-menu a:hover::before,
.header__nav-list .sub-menu a:focus::before {
    transform: scaleY(1);
}

/* Add dropdown indicator to parent items */
.header__nav-list>.menu-item-has-children>a::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 6px;
    vertical-align: middle;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    transition: transform 0.3s ease;
}

/* Rotate indicator when submenu is open */
.header__nav-list>.menu-item-has-children:hover>a::after,
.header__nav-list>.menu-item-has-children:focus-within>a::after {
    transform: rotate(180deg);
}

/* Nested submenus (if needed) */
.header__nav-list .sub-menu .sub-menu {
    top: 0;
    left: 100%;
    margin-left: 4px;
    margin-top: 0;
}

.header__nav-list .sub-menu .menu-item-has-children:hover>.sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* ========================================
   MOBILE NAVIGATION SUBMENU STYLES
   ======================================== */

@media only screen and (max-width: 985px) {

    /* Мобильная панель: меню скроллится, контакты всегда внизу */
    .header__mobile-active .header__mobile-wrapper {
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        overflow: hidden;
        padding-bottom: 0;
        -webkit-overflow-scrolling: auto;
    }

    .header__mobile-active .header__mobile-nav {
        flex: 1 1 auto;
        min-height: 0;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
        padding-right: 4px;
        padding-bottom: 12px;
    }

    .header__mobile-active .header__mob-nav-ul {
        padding-bottom: 8px;
    }

    .header__mobile-active .header__mobile-contacts {
        flex: 0 0 auto;
        margin-top: auto;
        position: relative;
        z-index: 5;
        background: #fff;
        padding: 16px 0 calc(16px + env(safe-area-inset-bottom, 0px));
        border-top: 1px solid rgba(0, 0, 0, 0.08);
        box-shadow: 0 -8px 24px rgba(20, 12, 48, 0.08);
    }

    /* Reset desktop styles for mobile */
    .header__mob-nav-ul .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        padding: 0;
        margin: 0;
        border-radius: 0;
        border: none;

        /* Hidden by default on mobile */
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
    }

    /* Show submenu when parent is active/clicked — только .active (без focus-within, иначе баг открытия/закрытия) */
    .header__mob-nav-ul .menu-item-has-children.active>.sub-menu {
        max-height: none;
        overflow: visible;
        padding-top: 12px;
        padding-bottom: 8px;
        margin-bottom: 8px;
    }

    /* Закрытая панель не должна «просвечивать» длинным списком маршрутов */
    .header__mobile:not(.header__mobile-active) .header__mob-nav-ul .menu-item-has-children.active > .sub-menu {
        max-height: 0;
        overflow: hidden;
        padding-top: 0;
        padding-bottom: 0;
        margin-bottom: 0;
    }

    /* Mobile submenu items */
    .header__mob-nav-ul .sub-menu li {
        border-left: 2px solid rgba(102, 126, 234, 0.25);
        margin-left: 8px;
        margin-top: 2px;
    }

    /* Mobile submenu links */
    .header__mob-nav-ul .sub-menu a {
        padding: 0 12px;
        font-size: 15px;
        color: var(--submenu-item-color);
        opacity: 0.9;
        border-radius: 10px;
        transition: background 0.2s ease, padding-left 0.2s ease;
    }

    .header__mob-nav-ul .sub-menu a::before {
        display: none;
        /* Remove left border on mobile */
    }

    .header__mob-nav-ul .sub-menu a:hover,
    .header__mob-nav-ul .sub-menu a:focus {
        background: var(--submenu-item-hover-bg);
        opacity: 1;
        padding-left: 18px;
    }

    /* Mobile dropdown indicator */
    .header__mob-nav-ul>.menu-item-has-children>a {
        position: relative;
        padding-right: 32px;
    }

    .header__mob-nav-ul>.menu-item-has-children>a::after {
        content: '';
        position: absolute;
        right: 12px;
        top: 50%;
        transform: translateY(-50%);
        width: 0;
        height: 0;
        border-left: 5px solid transparent;
        border-right: 5px solid transparent;
        border-top: 5px solid currentColor;
        transition: transform 0.3s ease;
    }

    .header__mob-nav-ul>.menu-item-has-children.active>a::after {
        transform: translateY(-50%) rotate(180deg);
    }

    /* Remove desktop hover indicator on mobile */
    .header__mob-nav-ul .menu-item-has-children>a::after {
        margin-left: 0;
    }

    /* No backdrop on mobile */
    .nav-backdrop {
        display: none;
    }
}

/* ========================================
   ACCESSIBILITY IMPROVEMENTS
   ======================================== */

/* Focus visible for keyboard navigation */
.header__nav-list a:focus-visible,
.header__mob-nav-ul a:focus-visible {
    outline: 2px solid #667eea;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Skip to content link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 100000;
}

.skip-link:focus {
    top: 0;
}

/* ========================================
   PERFORMANCE OPTIMIZATIONS
   ======================================== */

/* Use GPU acceleration for smooth animations */
.header__nav-list .sub-menu,
.header__mob-nav-ul .sub-menu,
.nav-backdrop {
    will-change: transform, opacity;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {

    .header__nav-list .sub-menu,
    .header__mob-nav-ul .sub-menu,
    .header__nav-list a,
    .header__mob-nav-ul a,
    .nav-backdrop,
    .header {
        transition: none;
    }
}

/* ========================================
   WORDPRESS MENU CLASSES SUPPORT
   ======================================== */

/* Current menu item highlighting */
.header__nav-list .current-menu-item>a,
.header__nav-list .current-menu-ancestor>a {
    font-weight: 600;
}

.header__nav-list .sub-menu .current-menu-item>a {
    background: var(--submenu-item-hover-bg);
    color: var(--submenu-item-hover-color);
}

.header__nav-list .sub-menu .current-menu-item>a::before {
    transform: scaleY(1);
}