/* ============================================
   Atlas Detectives - Header CSS
   Premium Investigation Agency
   ============================================ */

.site-header {
    position: fixed;
    top: 0.75rem;
    left: 50%;
    transform: translateX(-50%);
    width: min(calc(var(--max-width) - clamp(3rem, 8vw, 8rem)), calc(100% - 2rem));
    z-index: 1000;
    transition: all var(--transition-base);
    overflow: visible;
    border-radius: var(--radius-md);
    box-shadow: 0 6px 32px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.15);
}

/* ---- Top Bar ---- */
.header-topbar {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.4rem 1rem;
    font-size: var(--text-xs);
    font-family: var(--font-body);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: all var(--transition-base);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-left, .topbar-right {
    display: flex;
    align-items: center;
}

.topbar-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.02em;
}

.topbar-sep {
    color: rgba(255, 255, 255, 0.15);
}

.topbar-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.topbar-nav a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.topbar-nav a:hover {
    color: var(--color-accent);
}

.topbar-contact {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.topbar-phone {
    color: var(--color-white);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.topbar-phone:hover {
    color: var(--color-accent);
}

.topbar-avail {
    color: var(--color-accent);
    font-size: var(--text-xs);
    font-weight: 500;
}

.topbar-lang {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 0.5rem;
    padding-left: 1rem;
}

.lang-link {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

.lang-link:hover {
    color: var(--color-white);
}

.lang-link.lang-active {
    color: var(--color-accent);
}

/* ---- Main Header ---- */
.header-main {
    background: var(--color-primary);
    padding: 0.625rem 1rem;
    transition: all var(--transition-base);
    border-bottom: none;
    position: relative;
    z-index: 1002;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.header-main-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

/* Logo */
.header-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
    transition: opacity var(--transition-fast);
}

.header-logo:hover {
    opacity: 0.8;
}

.logo-img {
    height: 32px;
    width: auto;
    display: block;
    filter: brightness(0) invert(1);
}

/* Main Nav */
.header-nav {
    display: flex;
    align-items: center;
    gap: 0;
    flex: 1;
    justify-content: center;
}

.nav-item-wrap {
    position: static;
}

.header-nav .nav-item {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    padding: 0.375rem 0.5rem;
    position: relative;
    transition: color var(--transition-fast);
    text-decoration: none;
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.nav-chevron {
    transition: transform var(--transition-fast);
    opacity: 0.5;
}

.nav-item-wrap.active .nav-chevron {
    transform: rotate(180deg);
    opacity: 1;
}

.header-nav .nav-item:hover {
    color: var(--color-white);
}

.header-nav .nav-item.active {
    color: var(--color-accent);
}

/* Active state when mega menu is open */
.nav-item-wrap.active .nav-item {
    color: var(--color-accent);
}

/* ---- Mega Menu ---- */
/*
 * Mega panels live as direct children of <header> (outside .header-main)
 * so they escape the backdrop-filter stacking context.
 * The header itself has z-index:1000, overlay has 999 -> panels always on top.
 * JS sets the exact top value dynamically based on header-main bottom edge.
 */
.mega-menu {
    position: fixed;
    left: 50%;
    width: min(calc(var(--max-width) - clamp(3rem, 8vw, 8rem)), calc(100% - 2rem));
    /* top is set by JS using getBoundingClientRect() */
    top: 0;
    background: var(--color-white);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateX(-50%) translateY(-8px);
    transition: opacity 0.25s var(--ease-out-expo), transform 0.25s var(--ease-out-expo), visibility 0.25s ease;
    border: 1px solid var(--color-border);
    border-top: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    /* Delay opening to prevent accidental triggers */
    transition-delay: 0.25s;
}

/* Remove delay when opening */
.mega-menu.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
    transition-delay: 0s;
}

/* Invisible bridge above mega panel to catch cursor moving from nav bar to panel */
.mega-menu.open::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 0;
    right: 0;
    height: 12px;
    pointer-events: auto;
}

.mega-menu-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2.5rem clamp(1.5rem, 4vw, 4rem);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2.5rem;
}

.mega-col-title {
    display: block;
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a.mega-col-title:hover {
    color: var(--color-accent);
}

.mega-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mega-links li {
    margin-bottom: 0;
}

.mega-links a {
    display: block;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-light);
    padding: 0.45rem 0.5rem;
    text-decoration: none;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
    margin: 0 -0.5rem;
}

.mega-links a:hover {
    color: var(--color-primary);
    background: var(--color-cream);
}

/* CTA column in mega menu */
.mega-col-cta {
    background: var(--color-cream);
    padding: 2rem;
    border-radius: var(--radius-lg);
}

.mega-cta-text {
    font-size: var(--text-sm);
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.mega-cta-btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--color-accent);
    color: var(--color-primary);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition: all var(--transition-fast);
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
}

.mega-cta-btn:hover {
    background: var(--color-accent-light);
    color: var(--color-primary);
}

.mega-cta-phone {
    display: block;
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.mega-cta-phone:hover {
    color: var(--color-accent);
}

/* Mega Overlay
 * Lives OUTSIDE the header in the DOM, so it needs z-index below the header
 * (1000) but above normal page content. pointer-events only blocks page, not header.
 */
.mega-overlay {
    position: fixed;
    inset: 0;
    background: rgba(6, 13, 23, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
    cursor: pointer;
    backdrop-filter: blur(2px);
}

.mega-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-shrink: 0;
}

.header-phone {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.header-phone:hover {
    color: var(--color-accent);
}

.header-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--color-accent);
    color: var(--color-primary);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: all var(--transition-fast);
    white-space: nowrap;
    border-radius: var(--radius-sm);
}

.header-cta-btn:hover {
    background: var(--color-accent-light);
    color: var(--color-primary);
}

/* Burger */
.header-burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    transition: all var(--transition-fast);
}

.header-burger span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: var(--color-white);
    transition: all var(--transition-base);
    transform-origin: center;
}

.header-burger:hover span {
    background: var(--color-accent);
}

.header-burger.open {
    z-index: 1002;
    position: relative;
}

.header-burger.open span {
    background: var(--color-white);
}

.header-burger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header-burger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.header-burger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---- Mobile Menu ---- */
.header-mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-primary);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateX(100%);
    transition: all 0.4s var(--ease-out-expo);
    overflow-y: auto;
}

.header-mobile-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* Close Button */
.mobile-menu-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    color: rgba(255, 255, 255, 0.6);
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-fast);
}

.mobile-menu-close:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: rotate(90deg);
}

.mobile-menu-inner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
    padding: 100px clamp(2rem, 6vw, 4rem) 3rem;
    gap: var(--space-2xl);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mobile-nav-links > a {
    font-family: var(--font-heading);
    font-size: clamp(1.25rem, 5vw, 2rem);
    font-weight: 700;
    color: var(--color-white);
    padding: 0.75rem 0;
    transition: all var(--transition-fast);
    display: block;
    border-bottom: 1px solid var(--color-border-light);
    text-decoration: none;
}

.mobile-nav-links > a:hover {
    color: var(--color-accent);
    padding-left: 1rem;
}

/* Mobile Nav Groups (accordion) */
.mobile-nav-group {
    border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    font-family: var(--font-heading);
    font-size: clamp(1.25rem, 5vw, 2rem);
    font-weight: 700;
    color: var(--color-white);
    padding: 0.75rem 0;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.mobile-nav-toggle:hover {
    color: var(--color-accent);
}

.mobile-nav-toggle svg {
    transition: transform var(--transition-fast);
    opacity: 0.5;
}

.mobile-nav-toggle.open svg {
    transform: rotate(180deg);
    opacity: 1;
}

.mobile-nav-sub {
    display: none;
    flex-direction: column;
    padding: 0 0 1rem 0;
}

.mobile-nav-sub.open {
    display: flex;
}

.mobile-nav-sub a {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.7);
    padding: 0.5rem 0 0.5rem 1rem;
    text-decoration: none;
    transition: all var(--transition-fast);
    display: block;
}

.mobile-nav-sub a:first-child {
    font-weight: 600;
    color: var(--color-accent);
    padding-left: 0;
    margin-bottom: 0.5rem;
}

.mobile-nav-sub a:hover {
    color: var(--color-white);
    padding-left: 1.5rem;
}

.mobile-sub-label {
    display: block;
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.3);
    padding: 0.75rem 0 0.25rem 0;
    margin-top: 0.5rem;
}

.mobile-menu-footer {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding-top: var(--space-xl);
}

.mobile-menu-footer a {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-sm);
}

.mobile-menu-footer a.btn-primary {
    background: var(--color-accent);
    color: var(--color-primary);
    border: 1px solid var(--color-accent);
}

.mobile-menu-footer a.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.mobile-menu-contact span {
    font-size: var(--text-sm);
    color: var(--color-text-on-dark);
}

/* Mobile Language Switcher */
.mobile-lang-switch {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding-top: var(--space-lg);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .header-nav {
        display: none;
    }

    .header-burger {
        display: flex;
    }
    
    .header-phone {
        display: none;
    }

    .header-topbar {
        display: none;
    }

    .site-header {
        top: 0.5rem;
        width: calc(100% - 1rem);
    }

    .site-header .header-main {
        border-radius: var(--radius-md);
    }
}

@media (max-width: 768px) {
    .header-cta-btn {
        display: none;
    }
}