#ai_header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 100;
    background: transparent;
    transition: all 0.3s ease;
}

#ai_header.scrolled,
body.scrolled #ai_header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

#ai_header .header-nav {
    padding: 1rem 0;
    transition: padding 0.3s ease;
}

#ai_header.scrolled .header-nav,
body.scrolled #ai_header .header-nav {
    padding: 0.75rem 0;
}

#ai_header .nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

#ai_header .nav-brand {
    display: flex;
    align-items: center;
}

#ai_header .brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

#ai_header .site-logo {
    height: 90px;
    width: auto;
    transition: all 0.3s ease;
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3), 0 0 40px rgba(255, 255, 255, 0.1);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

#ai_header.scrolled .site-logo,
body.scrolled #ai_header .site-logo {
    height: 80px;
    box-shadow: 0 0 15px rgba(55, 163, 161, 0.2), 0 0 30px rgba(55, 163, 161, 0.1);
    filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.15));
}



#ai_header .site-navigation-1.desktop-nav {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

#ai_header .nav-item {
    position: relative;
}

#ai_header .nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#ai_header.scrolled .nav-link,
body.scrolled #ai_header .nav-link {
    color: var(--brand-dark);
}

#ai_header .nav-link:hover {
    color: var(--brand-primary);
}

#ai_header .dropdown-arrow {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

#ai_header .has-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

#ai_header .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    border-radius: 0.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    margin-top: 0.5rem;
    list-style: none;
    padding: 0.5rem 0;
}

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

#ai_header .dropdown-menu li {
    padding: 0;
}

#ai_header .dropdown-menu a {
    display: block;
    padding: 0.5rem 1.5rem;
    color: var(--brand-dark);
    text-decoration: none;
    transition: all 0.3s ease;
}

#ai_header .dropdown-menu a:hover {
    background: var(--brand-light);
    color: var(--brand-primary);
}

#ai_header .nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#ai_header .search-button {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

#ai_header.scrolled .search-button,
body.scrolled #ai_header .search-button {
    color: var(--brand-primary);
}

#ai_header .search-button:hover {
    transform: scale(1.1);
}

#ai_header .auth-buttons {
    display: flex;
    gap: 1rem;
}

#ai_header .site-button {
    padding: 0.5rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

#ai_header .header-signin {
    background: transparent;
    color: white;
    border: 2px solid white;
}

#ai_header.scrolled .header-signin,
body.scrolled #ai_header .header-signin {
    color: var(--brand-primary);
    border-color: var(--brand-primary);
}

#ai_header .header-signin:hover {
    background: white;
    color: var(--brand-dark);
}

#ai_header.scrolled .header-signin:hover,
body.scrolled #ai_header .header-signin:hover {
    background: var(--brand-primary);
    color: white;
}

#ai_header .header-subscribe {
    background: var(--brand-primary);
    color: white;
    border: 2px solid var(--brand-primary);
}

#ai_header .header-subscribe:hover {
    background: #ff5520;
    border-color: #ff5520;
    transform: translateY(-2px);
}

#ai_header .mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

#ai_header .hamburger-line {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

#ai_header.scrolled .hamburger-line,
body.scrolled #ai_header .hamburger-line {
    background: var(--brand-dark);
}

#ai_header .mobile-nav-wrapper {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: white;
    z-index: 99;
    transition: left 0.3s ease;
    overflow-y: auto;
}

#ai_header .mobile-nav-wrapper.active {
    left: 0;
}

#ai_header .mobile-nav {
    list-style: none;
    padding: 5rem 0 2rem;
    margin: 0;
}

#ai_header .mobile-nav .nav-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

#ai_header .mobile-nav .nav-link {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--brand-dark);
    text-decoration: none;
    font-weight: 500;
}

#ai_header .mobile-nav .nav-link:hover {
    background: var(--brand-light);
    color: var(--brand-primary);
}

#ai_header .mobile-nav .nav-link.highlight {
    color: var(--brand-primary);
    font-weight: 600;
}

#ai_header .mobile-nav .mobile-section-header {
    padding: 0.75rem 1.5rem;
    background: var(--brand-light);
    border-bottom: none;
}

#ai_header .mobile-nav .section-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--brand-primary);
    letter-spacing: 0.5px;
}

#ai_header .mobile-nav .nav-item.indent .nav-link {
    padding-left: 2.5rem;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    #ai_header .site-navigation-1.desktop-nav {
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    #ai_header .site-navigation-1.desktop-nav,
    #ai_header .auth-buttons {
        display: none;
    }

    #ai_header .mobile-menu-toggle {
        display: flex;
    }

    #ai_header .search-button {
        font-size: 1rem;
    }

    #ai_header .nav-actions {
        gap: 1rem;
    }
}

/* Mobile Menu Overlay */
#ai_header::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 98;
}

#ai_header.mobile-menu-open::after {
    opacity: 1;
    visibility: visible;
}