/**
 * Sticky Navbar Fix CSS
 * Handles sticky navbar behavior, scroll effects, and navigation enhancements
 */

/* ============================================
   Sticky Navbar Base Styles
   ============================================ */

#mainNavbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: #ffffff;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Navbar when scrolled */
#mainNavbar.scrolled {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Navbar Scroll Effects
   ============================================ */

/* Add shadow when scrolling */
.navbar-scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1) !important;
}

/* Navbar background opacity on scroll */
.navbar-transparent {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

/* ============================================
   Navbar Link Styles
   ============================================ */

#mainNavbar a {
    position: relative;
    transition: color 0.3s ease;
}

#mainNavbar a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #1e3a5f;
    transition: width 0.3s ease;
}

#mainNavbar a:hover::after,
#mainNavbar a.active::after {
    width: 100%;
}

/* ============================================
   Smooth Scroll Offset
   ============================================ */

/* Add padding to sections to account for sticky navbar */
section[id] {
    scroll-margin-top: 80px;
}

/* For smooth scrolling with offset */
html {
    scroll-padding-top: 80px;
}

/* ============================================
   Mobile Navbar Styles
   ============================================ */

@media (max-width: 768px) {
    #mainNavbar {
        position: sticky;
        top: 0;
    }
    
    /* Mobile menu adjustments */
    #mainNavbar .mobile-menu {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    #mainNavbar .mobile-menu.active {
        max-height: 500px;
    }
}

/* ============================================
   Navbar Active State
   ============================================ */

/* Highlight active navigation item */
.nav-item.active {
    color: #1e3a5f;
    font-weight: 600;
}

/* ============================================
   Navbar Dropdown (if applicable)
   ============================================ */

.navbar-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #ffffff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 0.375rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

.navbar-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ============================================
   Navbar Search (if applicable)
   ============================================ */

.navbar-search {
    position: relative;
}

.navbar-search input {
    width: 100%;
    padding: 0.5rem 1rem;
    border: 1px solid #e0e0e0;
    border-radius: 0.375rem;
    transition: border-color 0.3s ease;
}

.navbar-search input:focus {
    outline: none;
    border-color: #1e3a5f;
}

/* ============================================
   Navbar Animation on Load
   ============================================ */

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

#mainNavbar {
    animation: slideDown 0.5s ease-out;
}

/* ============================================
   Navbar Fixed Position Alternative
   ============================================ */

/* If navbar needs to be fixed instead of sticky */
.navbar-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
}

/* Add padding to body when navbar is fixed */
.body-with-fixed-navbar {
    padding-top: 80px;
}

/* ============================================
   Navbar Responsive Breakpoints
   ============================================ */

@media (min-width: 769px) {
    #mainNavbar {
        position: sticky;
    }
}

@media (max-width: 768px) {
    #mainNavbar {
        position: sticky;
    }
    
    section[id] {
        scroll-margin-top: 60px;
    }
    
    html {
        scroll-padding-top: 60px;
    }
}

/* ============================================
   Navbar Z-Index Management
   ============================================ */

/* Ensure navbar stays above content but below modals */
#mainNavbar {
    z-index: 1000;
}

/* Ensure dropdowns are above navbar */
.navbar-dropdown {
    z-index: 1001;
}

/* ============================================
   Navbar Performance Optimizations
   ============================================ */

/* Use will-change for smooth animations */
#mainNavbar {
    will-change: transform, box-shadow;
}

/* Reduce repaints during scroll */
.navbar-scrolled {
    transform: translateZ(0);
}