/* Header Styles */
.site-header {
    background-color: var(--white);
    border-bottom: 1px solid var(--grey-200);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.header-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

/* Logo */
.logo {
    font-size: var(--text-2xl);
    font-weight: 700;
}

.logo a {
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
}

.logo-text .highlight {
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--space-2);
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--space-2) var(--space-4);
    text-decoration: none;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-1);
    border-radius: var(--radius-md);
}

.nav-menu a:hover {
    color: var(--primary-color);
    background-color: var(--grey-50);
}

.nav-menu a.active {
    color: var(--primary-color);
    font-weight: 600;
    background-color: var(--primary-light);
    background-color: rgba(59, 130, 246, 0.1);
}

/* Dropdown Menus */
.has-dropdown {
    position: relative;
}

.has-dropdown > a i {
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

.has-dropdown:hover > a i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    border: 1px solid var(--grey-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    padding: var(--space-2) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 50;
    list-style: none;
    margin: 0;
}

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

.dropdown-menu li {
    margin: 0;
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--text-secondary);
    font-weight: 400;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background-color: var(--grey-50);
    color: var(--primary-color);
    padding-left: var(--space-5);
}

/* Search Form */
.nav-search {
    margin-left: var(--space-4);
}

.search-form {
    display: flex;
    align-items: center;
    position: relative;
}

.search-input {
    width: 240px;
    padding: var(--space-2) var(--space-10) var(--space-2) var(--space-4);
    border: 1px solid var(--grey-300);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    transition: all 0.2s ease;
    background-color: var(--grey-50);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--white);
    width: 280px;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-btn {
    position: absolute;
    right: 4px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.search-btn:hover {
    background-color: var(--primary-dark);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    z-index: 101;
    position: relative;
}

.menu-toggle .bar {
    display: block;
    width: 24px;
    height: 2px;
    margin: 5px 0;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
}

/* Menu toggle animation for active state */
.menu-toggle.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    padding: var(--space-4) 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 99;
    height: auto;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
}

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

.mobile-menu ul {
    list-style: none;
}

.mobile-menu > ul > li {
    border-bottom: 1px solid var(--grey-100);
}

.mobile-menu > ul > li:last-child {
    border-bottom: none;
}

.mobile-menu a {
    color: var(--text-primary);
    font-weight: 500;
    display: block;
    text-decoration: none;
    padding: var(--space-3) var(--space-6);
    transition: all 0.2s ease;
}

.mobile-menu a:hover {
    background-color: var(--grey-50);
    color: var(--primary-color);
}

/* Mobile Submenu */
.has-submenu .submenu {
    display: none;
    background-color: var(--grey-50);
    padding-left: var(--space-6);
}

.has-submenu.active .submenu {
    display: block;
}

.submenu a {
    font-weight: 400;
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-6);
}

/* Mobile Search */
.mobile-search {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--grey-100);
    margin-top: var(--space-4);
}

.mobile-search form {
    display: flex;
    gap: var(--space-2);
}

.mobile-search-input {
    flex: 1;
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--grey-300);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
}

.mobile-search button {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    cursor: pointer;
}

/* Responsive */
@media (max-width: 1024px) {
    .search-input {
        width: 200px;
    }
    
    .search-input:focus {
        width: 240px;
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-search {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .header-wrapper {
        height: 70px;
    }
    
    .mobile-menu {
        top: 70px;
    }
}

@media (max-width: 576px) {
    .logo-text {
        font-size: 1.5rem;
    }
}