/* ====================================
   FIXED HEADER & NAVIGATION
   ==================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 72px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-fixed);
    transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-medium);
}

/* Scroll progress bar */
.scroll-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    width: 0;
    transition: width 0.1s linear;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* ====================================
   BRAND / LOGO
   ==================================== */
.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    flex-shrink: 0;
}

.navbar-brand img {
    height: 36px;
    width: auto;
}

.brand-divider {
    display: inline-block;
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 0 var(--spacing-sm);
}

.brand-division {
    font-size: 0.7rem;
    color: var(--text-secondary);
    line-height: 1.2;
    letter-spacing: 0.02em;
}

.brand-division strong {
    display: block;
    font-size: 0.8rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* ====================================
   NAV LINKS
   ==================================== */
.navbar-menu {
    display: flex;
    align-items: center;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-md);
    right: var(--spacing-md);
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: center;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.nav-link.active {
    color: var(--primary-color);
}

/* ====================================
   PRODUCTS DROPDOWN
   ==================================== */
.nav-dropdown {
    position: relative;
}

.nav-dropdown .nav-link .dropdown-arrow {
    font-size: 0.65rem;
    transition: transform var(--transition-fast);
}

.nav-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    min-width: 220px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-heavy);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}

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

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

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

.dropdown-item-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--background-secondary);
    flex-shrink: 0;
}

.dropdown-item-icon img {
    width: 20px;
    height: 20px;
}

.dropdown-item-text {
    display: flex;
    flex-direction: column;
}

.dropdown-item-title {
    font-size: 0.875rem;
    font-weight: 600;
}

.dropdown-item-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ====================================
   NAVBAR END — CTA
   ==================================== */
.navbar-end {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--accent-color);
    color: var(--secondary-color);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-cta:hover {
    background: var(--accent-hover);
    color: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-gold);
}

/* ====================================
   MOBILE MENU TOGGLE
   ==================================== */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: var(--z-fixed);
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

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

/* ====================================
   BACK TO TOP BUTTON
   ==================================== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 48px;
    height: 48px;
    background: var(--secondary-color);
    color: var(--accent-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
    z-index: var(--z-sticky);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
}