/**
 * Header CSS - Navigation, Logo, Mobile-Menu
 * 
 * @package Smartteller
 * @version 2.0.0
 */

/* ============================================
   SITE HEADER
   ============================================ */
.site-header {
    position: relative;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    z-index: var(--z-sticky);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
    min-height: 64px;
}

/* Sticky Header */
.site-header.header-sticky {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    box-shadow: var(--shadow-md);
    animation: slideDown 0.3s ease;
}

.site-header.header-hidden {
    transform: translateY(-100%);
}

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

/* ============================================
   LOGO
   ============================================ */
.header-logo {
    flex-shrink: 0;
}

.header-logo a {
    display: block;
}

.logo-desktop {
    display: none;
    height: 40px;
    width: auto;
}

.logo-mobile {
    display: block;
    height: 40px;
    width: auto;
}

/* ============================================
   MAIN NAVIGATION (Desktop)
   ============================================ */
.main-nav {
    display: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-menu a:hover {
    color: var(--primary-green);
    background: var(--bg-light);
}

/* Dropdown */
.sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    padding: var(--space-2);
    min-width: 200px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.nav-menu li:hover .sub-menu {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.sub-menu a {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
}

/* ============================================
   HEADER CTA
   ============================================ */
.header-cta {
    display: none;
}

/* ============================================
   MOBILE MENU TOGGLE
   ============================================ */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: var(--space-2);
    background: none;
    border: none;
    cursor: pointer;
    z-index: calc(var(--z-modal) + 1);
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark-navy);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   MOBILE MENU (Off-Canvas)
   ============================================ */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 85%;
    max-width: 360px;
    background: var(--bg-white);
    z-index: var(--z-modal);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu[aria-hidden="true"] {
    display: none;
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-light);
}

.mobile-menu-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
}

/* Mobile Navigation */
.mobile-nav {
    flex: 1;
    padding: var(--space-4);
}

.mobile-nav-menu {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.mobile-nav-menu a {
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav-menu a:hover {
    background: var(--bg-light);
    color: var(--primary-green);
}

/* Mobile Menu Footer */
.mobile-menu-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--border-light);
}

.mobile-social {
    margin-top: var(--space-4);
}

.social-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.mobile-social .social-icons {
    display: flex;
    gap: var(--space-3);
}

.mobile-social .social-icons a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-light);
    transition: all var(--transition-fast);
}

.mobile-social .social-icons a:hover {
    background: var(--primary-green);
}

.mobile-social .social-icons a:hover img {
    filter: brightness(0) invert(1);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: calc(var(--z-modal) - 1);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.mobile-menu-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* ============================================
   AD SECTION HEADER
   ============================================ */
.ad-section-header {
    background: var(--bg-light);
    padding: var(--space-3) 0;
}

/* ============================================
   SKIP LINK
   ============================================ */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-3) var(--space-6);
    background: var(--primary-green);
    color: var(--bg-white);
    font-weight: 600;
    border-radius: var(--radius-md);
    z-index: calc(var(--z-modal) + 10);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-4);
}