/**
 * ZMCOR Navigation 2026
 * Modern glassmorphism + micro-interactions
 * Optimized for Core Web Vitals and SEO
 *
 * @version 1.0.0
 * @author ZMCOR
 */

/* ====================================
   2026 Navigation Enhancement
   ==================================== */

/* Enhanced CSS Variables for 2026 trends */
:root {
    /* Advanced animation curves */
    --nav-ease-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --nav-ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --nav-ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --nav-ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);

    /* Glassmorphism enhancement */
    --nav-glass-bg: rgba(255, 255, 255, 0.85);
    --nav-glass-border: rgba(255, 255, 255, 0.18);
    --nav-glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    --nav-glass-shadow-strong: 0 12px 40px rgba(31, 38, 135, 0.2);

    /* Interactive states */
    --nav-hover-lift: translateY(-2px);
    --nav-active-scale: 0.98;
    --nav-transition-base: 0.2s var(--nav-ease-smooth);
    --nav-transition-fast: 0.15s var(--nav-ease-smooth);
}

/* ====================================
   Enhanced Header with Glassmorphism
   ==================================== */

.header {
    background: var(--nav-glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--nav-glass-border);
    box-shadow: var(--nav-glass-shadow);
    transition: all 0.3s var(--nav-ease-smooth);
    will-change: transform, box-shadow;
}

/* Header state when scrolled */
.header.scrolled {
    --nav-glass-bg: rgba(255, 255, 255, 0.95);
    box-shadow: var(--nav-glass-shadow-strong);
}

/* Header performance optimization */
.header:not(.nav-visible) {
    contain: layout style paint;
}

/* ====================================
   Enhanced Navigation Links
   ==================================== */

/* Magnetic button effect for primary CTA */
.nav-link--primary {
    position: relative;
    transition: transform 0.2s var(--nav-ease-elastic),
                box-shadow 0.2s var(--nav-ease-smooth);
}

.nav-link--primary:hover {
    transform: var(--nav-hover-lift) scale(1.02);
    box-shadow:
        0 8px 20px rgba(234, 88, 12, 0.3),
        0 2px 6px rgba(0, 0, 0, 0.1);
}

.nav-link--primary:active {
    transform: var(--nav-active-scale);
}

/* Ripple effect on nav links */
.nav-link {
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(29, 78, 216, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.4s var(--nav-ease-smooth),
                height 0.4s var(--nav-ease-smooth);
    pointer-events: none;
}

.nav-link:hover::before {
    width: 200%;
    height: 200%;
}

/* Active state for nav links */
.nav-link.active {
    font-weight: var(--font-weight-semibold);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-brand-primary);
    border-radius: 1px;
}

/* ====================================
   Dropdown Menu Enhancements
   ==================================== */

.nav-dropdown-menu {
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-8px) scale(0.95);
    transition: all 0.2s var(--nav-ease-smooth);
    background: var(--nav-glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--nav-glass-border);
    box-shadow: var(--nav-glass-shadow-strong);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown-toggle[aria-expanded="true"] + .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0) scale(1);
}

/* Staggered animation for dropdown items */
.nav-dropdown-menu li {
    opacity: 0;
    transform: translateX(-10px);
    animation: navSlideIn 0.3s var(--nav-ease-smooth) forwards;
}

.nav-dropdown-menu li:nth-child(1) { animation-delay: 0.05s; }
.nav-dropdown-menu li:nth-child(2) { animation-delay: 0.1s; }
.nav-dropdown-menu li:nth-child(3) { animation-delay: 0.15s; }
.nav-dropdown-menu li:nth-child(4) { animation-delay: 0.2s; }
.nav-dropdown-menu li:nth-child(5) { animation-delay: 0.25s; }

@keyframes navSlideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Dropdown header styling */
.dropdown-header {
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-neutral-500);
    padding: 0.5rem 1rem;
    margin-top: 0.5rem;
}

/* ====================================
   Mobile Navigation Enhancements
   ==================================== */

@media (max-width: 1024px) {
    .nav-menu {
        backdrop-filter: blur(40px);
        background: rgba(255, 255, 255, 0.98);
        box-shadow: var(--nav-glass-shadow-strong);
    }

    .nav-menu.active {
        transform: translateX(0);
    }
}

/* ====================================
   Language Switcher Enhancements
   ==================================== */

.current-language {
    position: relative;
}

.current-language.loading {
    pointer-events: none;
    opacity: 0.7;
}

.current-language.loading::after {
    content: '';
    position: absolute;
    inset: -4px;
    border: 2px solid var(--color-brand-primary);
    border-radius: 8px;
    animation: languageLoading 1.5s linear infinite;
}

@keyframes languageLoading {
    0% {
        transform: rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: rotate(360deg);
        opacity: 0;
    }
}

/* Flag icons with subtle animation */
.flag-icon {
    transition: transform 0.2s var(--nav-ease-elastic);
}

.current-language:hover .flag-icon {
    transform: scale(1.1);
}

/* ====================================
   Logo Enhancement
   ==================================== */

.logo {
    transition: transform 0.2s var(--nav-ease-smooth);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    transition: transform 0.3s var(--nav-ease-bounce);
}

.logo:hover .logo-icon {
    transform: rotate(-5deg) scale(1.05);
}

/* ====================================
   Performance & Accessibility
   ==================================== */

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .nav-link::before,
    .nav-dropdown-menu li,
    .current-language.loading::after,
    .logo-icon {
        animation: none !important;
        transition: none !important;
    }

    .nav-link--primary:hover,
    .nav-link:hover,
    .logo:hover {
        transform: none !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .header {
        --nav-glass-bg: rgba(255, 255, 255, 0.98);
        border-bottom: 2px solid var(--color-neutral-900);
    }

    .nav-link--primary:hover {
        box-shadow:
            0 0 0 2px var(--color-brand-primary),
            0 4px 12px rgba(234, 88, 12, 0.3);
    }
}

/* Focus visible enhancements for keyboard navigation */
.nav-link:focus-visible,
.nav-dropdown-toggle:focus-visible,
.current-language:focus-visible {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ====================================
   Utilities
   ==================================== */

/* Note: contain: strict was removed - it clips dropdown menus */

/* GPU acceleration for smooth animations */
.nav-link,
.nav-link--primary,
.logo {
    transform: translateZ(0);
    will-change: transform;
}

/* Prevent layout shift */
.nav-toggle {
    min-width: 44px;
    min-height: 44px;
}

/* ====================================
   Toast Notifications
   ==================================== */

.language-toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    min-width: 300px;
    padding: 1rem;
    background: var(--nav-glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--nav-glass-border);
    border-radius: 12px;
    box-shadow: var(--nav-glass-shadow-strong);
    animation: toastIn 0.3s var(--nav-ease-bounce);
    z-index: 1000;
}

.language-toast.hiding {
    animation: toastOut 0.3s var(--nav-ease-smooth) forwards;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes toastOut {
    to {
        opacity: 0;
        transform: translateY(-20px) scale(0.9);
    }
}