/* UNIFIED NAVIGATION SYSTEM - Content-Aware Responsive Design */

/* Navigation Variables */
:root {
    --nav-height: 72px;
    --nav-padding: 16px;
    --nav-gap: 32px;
    --nav-font-size: 16px;
    --nav-font-weight: 600;
    --nav-transition: all 0.3s ease;
    --nav-z-index: 1000;
    --dropdown-z-index: 1001;
    --mobile-menu-z-index: 99999;
    
    /* Touch targets */
    --touch-target-min: 44px;
    --mobile-font-size: 18px;
    --mobile-padding: 16px 24px;
}

/* Header Layout - Modern Flexbox */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--nav-z-index);
    transition: var(--nav-transition);
    min-height: var(--nav-height);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(15px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--nav-gap);
    padding: var(--nav-padding) 0;
    min-height: calc(var(--nav-height) - 2 * var(--nav-padding));
    position: relative;
}

/* Logo Section - Properly sized to fully contain the logo graphic */
.logo {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    width: 400px; /* Wide enough to contain full logo text */
    min-width: 400px; 
    padding-right: 40px; /* Padding for separation */
    justify-content: flex-start;
}

.logo a {
    display: inline-block;
    transition: var(--nav-transition);
    text-decoration: none;
    width: fit-content;
    min-width: fit-content;
}

.logo a:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.logo img {
    height: clamp(36px, 5vw, 48px);
    width: auto;
    display: block;
    transition: var(--nav-transition);
    /* Force container to respect image bounds */
    min-width: auto;
    flex-shrink: 0;
}

/* Navigation Section - Properly contained with adequate space */
.navigation {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: visible;
    max-width: 800px; /* Maximum width limit */
    min-width: 600px; /* Minimum width to contain menu */
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: clamp(16px, 2.5vw, 28px); /* Responsive gap that reduces as screen shrinks */
    margin: 0;
    padding: 0;
    justify-content: center;
    width: 100%;
}

.nav-menu > li {
    position: relative;
    flex: 0 0 auto;
    max-width: none; /* Allow natural sizing */
}

.nav-link {
    color: var(--text-color);
    font-weight: var(--nav-font-weight);
    font-size: var(--nav-font-size);
    text-decoration: none;
    position: relative;
    transition: var(--nav-transition);
    padding: 12px 16px;
    border-radius: var(--border-radius);
    white-space: nowrap;
    display: inline-block;
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
}

.nav-link:hover {
    color: var(--accent-color);
    background-color: rgba(229, 121, 26, 0.1);
}

/* Dropdown Menu - Enhanced positioning */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.dropdown-toggle i {
    font-size: 12px;
    transition: var(--nav-transition);
}

.dropdown:hover .dropdown-toggle i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    min-width: 240px;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-8px);
    transition: var(--nav-transition);
    z-index: var(--dropdown-z-index);
    padding: 8px 0;
    margin-top: 8px;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 15px;
    transition: var(--nav-transition);
    border-radius: 0;
    min-height: auto;
}

.dropdown-menu a:hover {
    background-color: var(--accent-color);
    color: #ffffff;
}

/* Header Controls - Fixed width container */
.header-controls {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 16px;
}

.language-switcher {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.lang-btn {
    background: none;
    border: none;
    padding: 8px 12px;
    font-size: 14px;
    font-weight: var(--nav-font-weight);
    cursor: pointer;
    transition: var(--nav-transition);
    min-width: 40px;
    min-height: 36px;
    color: var(--text-color);
}

.lang-btn:hover {
    background-color: rgba(229, 121, 26, 0.1);
}

.lang-btn.active {
    background-color: var(--accent-color);
    color: #ffffff;
}

/* Mobile Menu Toggle - Hidden by default */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    border-radius: var(--border-radius);
    transition: var(--nav-transition);
    position: relative;
    z-index: 10002;
}

.mobile-menu-toggle:hover {
    background-color: rgba(229, 121, 26, 0.1);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 3px;
    background-color: var(--text-color);
    margin: 3px 0;
    transition: var(--nav-transition);
    border-radius: 2px;
}

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

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

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

/* Content-Aware Responsive Behavior */

/* Gradual scaling for medium screens */
@media (max-width: 1024px) {
    :root {
        --nav-gap: 16px;
        --nav-font-size: 15px;
    }
    
    .logo img {
        height: clamp(34px, 4.5vw, 44px);
    }
    
    .nav-link {
        padding: 10px 14px;
    }
}

@media (max-width: 900px) {
    :root {
        --nav-gap: 14px;
        --nav-font-size: 14px;
    }
    
    .logo img {
        height: clamp(32px, 4vw, 40px);
    }
    
    .nav-link {
        padding: 8px 12px;
    }
}

/* Tablet adjustments */
@media (max-width: 768px) {
    :root {
        --nav-gap: 12px;
        --nav-font-size: 13px;
    }
    
    .header-content {
        gap: 12px;
    }
    
    .logo img {
        height: clamp(30px, 3.5vw, 36px);
    }
    
    .nav-link {
        padding: 6px 10px;
    }
    
    .lang-btn {
        padding: 6px 10px;
        font-size: 13px;
        min-width: 36px;
        min-height: 32px;
    }
}

/* Mobile mode adjustments - Fix for 550px-600px range */
@media (max-width: 600px) {
    .header-controls {
        z-index: 10001;
        position: relative;
    }
    
    .language-switcher {
        z-index: 10001;
        position: relative;
    }
    
    .mobile-menu-toggle {
        z-index: 10002;
        position: relative;
    }
    
    /* Ensure elements have proper touch targets */
    .lang-btn {
        min-width: 40px;
        min-height: 40px;
        padding: 8px 12px;
        touch-action: manipulation;
    }
    
    .mobile-menu-toggle {
        min-width: 48px;
        min-height: 48px;
        touch-action: manipulation;
    }
    
    /* Make logo flexible and very compact at 600px */
    .logo {
        width: auto;
        min-width: auto;
        padding-right: 16px;
        flex-shrink: 1;
    }
    
    /* Much smaller logo for mobile mode to ensure controls fit */
    .logo img {
        height: clamp(24px, 2.5vw, 28px);
    }
    
    /* More compact navigation layout */
    .header-content {
        gap: 6px;
        padding: 10px 0;
    }
    
    /* Ensure header controls are compact */
    .header-controls {
        gap: 8px;
        flex-shrink: 0;
    }
    
    /* Smaller language buttons for mobile */
    .lang-btn {
        font-size: 11px;
        padding: 6px 8px;
        min-width: 32px;
        min-height: 32px;
    }
    
    /* Smaller mobile menu toggle */
    .mobile-menu-toggle {
        min-width: 40px;
        min-height: 40px;
        padding: 6px;
    }
    
    .mobile-menu-toggle span {
        width: 20px;
        height: 2px;
        margin: 2px 0;
    }
}

/* Medium-small devices (iPhone 11 Pro, etc.) - Keep consistent sizing */
@media (max-width: 500px) {
    /* Keep logo same size as 600px breakpoint - no growth */
    .logo {
        width: auto;
        min-width: auto;
        padding-right: 16px;
        flex-shrink: 1;
    }
    
    .logo img {
        height: clamp(24px, 2.5vw, 28px);
    }
    
    /* Keep same compact layout as 600px breakpoint */
    .header-content {
        gap: 6px;
        padding: 10px 0;
    }
    
    .header-controls {
        gap: 8px;
        flex-shrink: 0;
    }
    
    /* Keep same small button sizes as 600px breakpoint */
    .lang-btn {
        font-size: 11px;
        padding: 6px 8px;
        min-width: 32px;
        min-height: 32px;
    }
    
    .mobile-menu-toggle {
        min-width: 40px;
        min-height: 40px;
        padding: 6px;
    }
    
    .mobile-menu-toggle span {
        width: 20px;
        height: 2px;
        margin: 2px 0;
    }
}

/* Extra small devices (iPhone SE, small Android phones) */
@media (max-width: 400px) {
    .logo {
        width: auto;
        min-width: auto;
        padding-right: 16px;
    }
    
    .logo img {
        height: clamp(24px, 2.5vw, 28px);
    }
    
    .lang-btn {
        font-size: 12px;
        padding: 6px 8px;
        min-width: 36px;
        min-height: 36px;
    }
    
    .mobile-menu-toggle {
        min-width: 44px;
        min-height: 44px;
    }
    
    .mobile-menu-toggle span {
        width: 20px;
        height: 2px;
        margin: 2px 0;
    }
}

/* Mobile Layout - Full overlay menu */
.header.mobile-mode .mobile-menu-toggle {
    display: flex;
}

.header.mobile-mode .navigation {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: #ffffff;
    background-color: #ffffff;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: 0;
    margin: 0;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: var(--mobile-menu-z-index);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    visibility: hidden;
    isolation: isolate;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.header.mobile-mode .navigation.active {
    transform: translateX(0);
    visibility: visible;
}

.header.mobile-mode .nav-menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 0;
    width: 100%;
    min-height: auto;
    max-height: calc(100vh - var(--nav-height) - 32px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* Internet Explorer 10+ */
    /* Ensure all items are visible */
    display: flex !important;
    flex-direction: column !important;
}

.header.mobile-mode .nav-menu::-webkit-scrollbar {
    display: none; /* WebKit */
}

.header.mobile-mode .nav-menu > li {
    width: 100%;
    border-bottom: 1px solid var(--border-color);
    /* Ensure all items are visible */
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    position: relative;
    flex-shrink: 0;
}

.header.mobile-mode .nav-menu > li:last-child {
    border-bottom: none;
}

.header.mobile-mode .nav-link {
    font-size: var(--mobile-font-size);
    padding: var(--mobile-padding);
    color: var(--text-color);
    text-align: left;
    width: 100%;
    border-radius: 0;
    min-height: 48px;
    display: flex;
    align-items: center;
}

@media (max-width: 400px) {
    .header.mobile-mode .nav-link {
        font-size: 16px;
        padding: 12px 20px;
        min-height: 44px;
    }
    
    .header.mobile-mode .dropdown-menu a {
        padding: 10px 40px;
        font-size: 14px;
        min-height: 40px;
    }
}

.header.mobile-mode .nav-link:hover {
    background-color: var(--accent-color);
    color: #ffffff;
}

/* Mobile dropdown */
.header.mobile-mode .dropdown-toggle {
    justify-content: space-between;
    width: 100%;
}

.header.mobile-mode .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: #f8f9fa;
    margin: 0;
    padding: 0;
    display: none;
}

.header.mobile-mode .dropdown.active .dropdown-menu {
    display: block;
}

.header.mobile-mode .dropdown.active .dropdown-toggle i {
    transform: rotate(180deg);
}

.header.mobile-mode .dropdown-menu a {
    padding: 14px 48px;
    font-size: 16px;
    color: #666;
    min-height: 48px;
}

.header.mobile-mode .dropdown-menu a:hover {
    background-color: #e9ecef;
    color: var(--accent-color);
}

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

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .header {
        border-bottom-width: 2px;
    }
    
    .dropdown-menu {
        border-width: 2px;
    }
}

/* Focus indicators - only show for keyboard navigation */
.nav-link:focus-visible,
.lang-btn:focus-visible,
.mobile-menu-toggle:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Remove default focus outline for mouse clicks */
.nav-link:focus:not(:focus-visible),
.lang-btn:focus:not(:focus-visible),
.mobile-menu-toggle:focus:not(:focus-visible) {
    outline: none;
}

/* Active states for mouse clicks - subtle feedback */
.nav-link:active {
    transform: translateY(1px);
    background-color: rgba(229, 121, 26, 0.15);
}

.lang-btn:active {
    transform: translateY(1px);
    background-color: rgba(229, 121, 26, 0.2);
}

/* Enhanced header transitions for mobile scroll behavior */
.header {
    transition: transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

/* Print styles */
@media print {
    .header {
        position: static;
        background: none;
        border-bottom: 1px solid #000;
        transform: translateY(0) !important;
    }
    
    .mobile-menu-toggle {
        display: none;
    }
    
    .scroll-to-top {
        display: none;
    }
}