/* ==============================================
   NAVIGATION BAR
   ============================================== */
.navbar {
    position: fixed;
    top: 15px;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    height: 56px;
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
}

.navbar.scrolled {
    top: 5px;
}

.navbar.scrolled .nav-container {
    height: 48px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
    background: var(--bg-main);
    opacity: 0.98;
}

/* Brand */
.nav-brand {
    display: flex;
    align-items: center;
}

.brand-logo {
    height: 32px;
    width: auto;
    object-fit: contain;
}

/* Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    font-weight: 500;
    font-size: 1rem;
    padding: 10px 18px;
    border-radius: 50px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-main);
}

.nav-link:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
}

.nav-link i {
    font-size: 0.8rem;
    transition: var(--transition);
}

/* Mega Dropdown */
.nav-item.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 150%;
    left: 50%;
    transform: translateX(-50%) translateY(15px);
    background: var(--bg-main);
    border: 1px solid var(--card-border);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border-radius: var(--radius-md);
    padding: 24px;
    width: 360px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

[data-theme="dark"] .dropdown-menu {
    box-shadow: 0 20px 40px rgba(0,0,0,0.8);
    background: var(--card-bg);
}

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

.nav-item.dropdown:hover .nav-link i {
    transform: rotate(180deg);
}

.dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.dropdown-item:hover {
    background: rgba(37, 99, 235, 0.05);
    transform: translateX(5px);
}

.dropdown-icon {
    width: 45px;
    height: 45px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.dropdown-item:hover .dropdown-icon {
    background: var(--primary);
    color: white;
}

.dropdown-text h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    color: var(--text-main);
    margin-bottom: 4px;
}

.dropdown-text p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-theme-toggle {
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-theme-toggle:hover {
    background: rgba(100, 116, 139, 0.1);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-main);
    cursor: pointer;
}

/* Responsive Navbar */
@media (max-width: 992px) {
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-main);
        flex-direction: column;
        padding: 20px;
        border-radius: var(--radius-md);
        box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        border: 1px solid var(--card-border);
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: var(--transition);
    }

    [data-theme="dark"] .nav-menu {
        box-shadow: 0 20px 40px rgba(0,0,0,0.8);
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(15px);
    }

    .nav-actions .btn-primary {
        display: none; /* Hide login button on mobile header */
    }

    .mobile-toggle {
        display: block;
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        width: 100%;
        justify-content: space-between;
        padding: 12px 20px;
    }

    .dropdown-menu {
        position: static;
        width: 100%;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border: none;
        padding: 10px 20px;
        display: none;
    }

    .nav-item.dropdown:hover .dropdown-menu {
        display: flex;
        transform: none;
    }
}