/*!
 * Sticky Menu Final - Simple & Stable
 * Menu sticky đơn giản và ổn định, giữ nguyên giao diện
 */

/* Force sticky header with highest priority */
.header {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    z-index: 9999 !important;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px) !important;
    -webkit-backdrop-filter: blur(20px) !important;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    border-bottom: 1px solid rgba(226, 232, 240, 0.3) !important;
    transform: none !important;
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
}

/* Enhanced when scrolled */
.header.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(25px) !important;
    -webkit-backdrop-filter: blur(25px) !important;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15) !important;
    border-bottom: 1px solid rgba(226, 232, 240, 0.5) !important;
}

/* Ensure body has proper spacing */
body {
    padding-top: 70px !important;
    margin-top: 0 !important;
}

/* Remove any hiding transforms - keep menu always visible */
.header.hidden,
.header.compact,
.header.visible {
    transform: none !important;
    position: fixed !important;
    top: 0 !important;
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
}

/* Ensure nav container is properly displayed */
.nav-container {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    visibility: visible !important;
    opacity: 1 !important;
    max-width: 1200px !important;
    margin: 0 auto !important;
    padding: 0 20px !important;
    height: 70px !important;
    gap: 15px !important;
}

/* Ensure nav menu is visible on desktop */
@media (min-width: 769px) {
    .nav-menu {
        display: flex !important;
        position: static !important;
        left: auto !important;
        top: auto !important;
        flex-direction: row !important;
        background: transparent !important;
        box-shadow: none !important;
        width: auto !important;
        visibility: visible !important;
        opacity: 1 !important;
        list-style: none !important;
        gap: 1.8rem !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    .nav-menu li {
        display: block !important;
    }
    
    .nav-menu a {
        display: block !important;
        text-decoration: none !important;
        color: #333 !important;
        font-weight: 500 !important;
        padding: 8px 12px !important;
        border-radius: 6px !important;
        transition: all 0.3s ease !important;
        white-space: nowrap !important;
        font-size: 0.95rem !important;
    }
    
    .nav-menu a:hover {
        background: rgba(37, 99, 235, 0.1) !important;
        color: #2563eb !important;
    }
}

/* Logo styling */
.nav-logo {
    flex-shrink: 0 !important;
    max-width: 250px !important;
    min-width: 200px !important;
}

.logo-content {
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    width: 100% !important;
}

.logo-main {
    display: flex !important;
    align-items: center !important;
    white-space: nowrap !important;
    margin-bottom: 2px !important;
    font-size: 1.5rem !important;
    font-weight: bold !important;
    color: #2563eb !important;
    gap: 10px !important;
}

.logo-slogan {
    font-size: 0.7rem !important;
    font-weight: 500 !important;
    color: #64748b !important;
    font-style: italic !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    max-width: 100% !important;
    line-height: 1.2 !important;
}

/* Language switcher */
.language-switcher {
    display: flex !important;
    gap: 8px !important;
    flex-shrink: 0 !important;
    margin-left: auto !important;
}

.lang-btn {
    padding: 6px 12px !important;
    font-size: 0.85rem !important;
    min-width: 40px !important;
    white-space: nowrap !important;
    border: 1px solid #ddd !important;
    background: white !important;
    border-radius: 4px !important;
    cursor: pointer !important;
    transition: all 0.3s ease !important;
}

.lang-btn.active {
    background: #2563eb !important;
    color: white !important;
    border-color: #2563eb !important;
}

.lang-btn:hover {
    background: rgba(37, 99, 235, 0.1) !important;
    border-color: #2563eb !important;
}

/* Mobile responsive */
@media (max-width: 768px) {
    body {
        padding-top: 60px !important;
    }
    
    .nav-container {
        height: 60px !important;
        padding: 0 15px !important;
    }
    
    .logo-main {
        font-size: 1.3rem !important;
    }
    
    .logo-slogan {
        font-size: 0.6rem !important;
        max-width: 150px !important;
    }
    
    .nav-menu {
        position: fixed !important;
        left: -100% !important;
        top: 60px !important;
        flex-direction: column !important;
        background-color: white !important;
        width: 100% !important;
        text-align: center !important;
        transition: 0.3s !important;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05) !important;
        padding: 1rem 0 !important;
        z-index: 999 !important;
    }
    
    .nav-menu.active {
        left: 0 !important;
    }
    
    .nav-menu li {
        margin: 0.5rem 0 !important;
    }
    
    .nav-menu a {
        padding: 0.75rem 1rem !important;
        font-size: 1rem !important;
        display: block !important;
    }
    
    .language-switcher {
        margin-left: 10px !important;
        gap: 5px !important;
    }
    
    .lang-btn {
        padding: 4px 8px !important;
        font-size: 0.75rem !important;
        min-width: 30px !important;
    }
    
    .nav-toggle {
        display: block !important;
        cursor: pointer !important;
        margin-left: 10px !important;
    }
    
    .nav-toggle span {
        display: block !important;
        width: 25px !important;
        height: 3px !important;
        margin: 5px auto !important;
        background-color: #333 !important;
        transition: 0.3s !important;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px) !important;
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0 !important;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px) !important;
    }
}

/* Hide nav-toggle on desktop */
@media (min-width: 769px) {
    .nav-toggle {
        display: none !important;
    }
}

/* Smooth scroll */
html {
    scroll-behavior: smooth !important;
}

/* Fallback for browsers without backdrop-filter */
@supports not (backdrop-filter: blur(20px)) {
    .header {
        background: rgba(255, 255, 255, 0.98) !important;
    }
    
    .header.scrolled {
        background: rgba(255, 255, 255, 1) !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .header {
        background: rgba(255, 255, 255, 1) !important;
        border-bottom: 2px solid #000 !important;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .header {
        transition: none !important;
    }
    
    html {
        scroll-behavior: auto !important;
    }
}