/**
 * Navigation Component
 * Header navigation styles with responsive mobile menu
 */

.nav-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition-base),
                box-shadow var(--transition-base);
}

.nav-header.scrolled {
    background-color: var(--color-white);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

/* Transparent state — sits over the dark scroll-scrub video hero */
.nav-header.nav-transparent {
    background-color: transparent;
    box-shadow: none;
}

/* Only whiten desktop nav links — NOT the mobile menu overlay */
.nav-header.nav-transparent .nav-links .nav-link {
    color: rgba(255, 255, 255, 0.9);
}

.nav-header.nav-transparent .nav-links .nav-link:hover {
    opacity: 1;
    color: var(--color-white);
}

/* When mobile menu is open, restore dark text regardless of transparent state */
.nav-header.menu-open .nav-link,
.nav-header.menu-open .nav-menu-links .nav-link {
    color: var(--text-primary);
}

.nav-header.nav-transparent .nav-toggle span {
    background-color: rgba(255, 255, 255, 0.9);
}

.nav-header.nav-transparent img.nav-logo--light {
    display: block;
}

/* Transparent state: white logo is 1.5× the scrolled-state size */
.nav-header.nav-transparent img.nav-logo {
    height: 63px; /* 42px × 1.5 */
}

@media (max-width: 768px) {
    .nav-header.nav-transparent img.nav-logo {
        height: 54px; /* 36px × 1.5 */
    }
}

.nav-header.nav-transparent img.nav-logo--dark {
    display: none;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-4) var(--container-padding);
    height: 80px;
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    z-index: 10;
}

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

.logo-text {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    letter-spacing: var(--tracking-tight);
    transition: color var(--transition-base);
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    letter-spacing: var(--tracking-wide);
    transition: color var(--transition-fast), opacity var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: currentColor;
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover {
    opacity: 0.8;
}

/* Navigation CTA Button */
.nav-cta {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
}

/* Mobile-only elements hidden on desktop */
.nav-mobile-cta {
    display: none;
}

.nav-mobile-models {
    display: none;
}

/* Close button — shown via :has() when overlay is open */
.nav-mobile-close {
    display: none;
    position: fixed;
    top: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    z-index: 9999;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0;
    gap: 0;
}

body:has(.nav-menu.active) .nav-mobile-close {
    display: flex;
}

.nav-mobile-close span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: #171717;
}

.nav-mobile-close span:nth-child(1) {
    transform: translateY(1px) rotate(45deg);
}

.nav-mobile-close span:nth-child(2) {
    transform: translateY(-1px) rotate(-45deg);
}

/* Mobile Menu Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    z-index: 10;
}

.hamburger {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    position: relative;
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform var(--transition-base);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

.nav-header.scrolled .hamburger,
.nav-header.scrolled .hamburger::before,
.nav-header.scrolled .hamburger::after {
    background-color: var(--text-primary);
}

/* Mobile menu open state */
.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg) translate(5px, 6px);
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* ===========================================
   Models Dropdown
   =========================================== */

.nav-dropdown {
    position: relative;
}

/* Chevron hint on the Models link */
.nav-dropdown > .nav-link::after {
    content: '';
    display: inline-block;
    position: static;
    width: 6px;
    height: 6px;
    background-color: transparent;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg) translateY(-1px);
    margin-left: 6px;
    opacity: 0.5;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    vertical-align: middle;
}

.nav-dropdown:hover > .nav-link::after {
    transform: rotate(225deg) translateY(2px);
    opacity: 0.8;
    width: 6px;
}

.nav-dropdown-panel {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    padding-top: var(--space-3);
    z-index: var(--z-dropdown);
}

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

.nav-dropdown-grid {
    display: flex;
    align-items: stretch;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
    padding: var(--space-3);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.nav-dropdown-divider {
    width: 1px;
    background-color: var(--border-light);
    margin: var(--space-2) 0;
    flex-shrink: 0;
}

.nav-dropdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    transition: background-color 0.18s ease;
    text-align: center;
    text-decoration: none;
    min-width: 150px;
    position: relative;
}

.nav-dropdown-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 24px;
    height: 2px;
    background-color: var(--color-brand);
    border-radius: 1px;
    transition: transform 0.2s ease;
}

a.nav-dropdown-item:hover {
    background-color: #f8f8f8;
}

a.nav-dropdown-item:hover::after {
    transform: translateX(-50%) scaleX(1);
}

a.nav-dropdown-item:hover .nav-dropdown-item-img {
    transform: scale(1.05);
}

.nav-dropdown-item-img-wrap {
    width: 150px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.nav-dropdown-item-img-wrap img,
.nav-dropdown-item img {
    width: 150px;
    height: 90px;
    object-fit: contain;
    transition: transform 0.25s ease;
    display: block;
}

.nav-dropdown-name {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    letter-spacing: var(--tracking-tight);
}

.nav-dropdown-tagline {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    font-weight: var(--font-normal);
    letter-spacing: 0.02em;
}

/* ===========================================
   Responsive Styles
   =========================================== */

@media (max-width: 1024px) {
    .nav-menu {
        gap: var(--space-6);
    }
}

@media (max-width: 768px) {
    .logo-image {
        height: 24px;
    }

    .logo-text {
        font-size: var(--text-base);
    }

    .nav-toggle {
        display: flex;
    }

    /* ---- Mobile Menu Overlay ---- */
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: var(--z-modal);
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        gap: 0;
        padding: 80px var(--container-padding) var(--container-padding);
        background-color: var(--color-white);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        overflow-y: auto;
    }

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

    /* ---- Mobile Menu Links ---- */
    .nav-menu > li {
        border-bottom: 1px solid var(--border-light);
    }

    .nav-menu .nav-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: var(--space-5) 0;
        font-size: var(--text-base);
        font-weight: var(--font-medium);
        color: var(--text-primary);
    }

    .nav-menu .nav-link::after {
        display: none;
    }

    /* Arrow for dropdown trigger on mobile */
    .nav-menu .nav-dropdown .nav-link::after {
        display: block;
        content: '';
        position: static;
        width: 8px;
        height: 8px;
        border-right: 2px solid var(--text-secondary);
        border-bottom: 2px solid var(--text-secondary);
        transform: rotate(-45deg);
        background: none;
        flex-shrink: 0;
    }

    /* ---- Desktop CTA hidden, mobile CTA at bottom ---- */
    .nav-cta {
        display: none !important;
    }

    .nav-mobile-cta {
        display: block;
        margin-top: auto;
        padding-top: var(--space-6);
    }

    .nav-mobile-cta .btn {
        width: 100%;
        justify-content: center;
    }

    /* ---- Raise header z-index when menu is open ---- */
    .nav-header.menu-open {
        z-index: var(--z-modal);
        backdrop-filter: none;
    }

    /* Hide the hamburger toggle while overlay is open (close btn handles it) */
    .nav-header.menu-open .nav-toggle {
        opacity: 0;
        pointer-events: none;
    }

    /* ---- Desktop dropdown hidden on mobile ---- */
    .nav-dropdown-panel {
        display: none;
    }

    /* ---- Mobile Models Sub-Panel ---- */
    .nav-mobile-models {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: var(--z-modal);
        background-color: var(--color-white);
        padding: 0 var(--container-padding) var(--container-padding);
        overflow-y: auto;
        flex-direction: column;
    }

    .nav-mobile-models.active {
        display: flex;
    }

    .nav-mobile-models-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 80px;
        flex-shrink: 0;
    }

    .nav-mobile-back {
        display: flex;
        align-items: center;
        gap: var(--space-2);
        font-size: var(--text-sm);
        font-weight: var(--font-medium);
        color: var(--text-primary);
        background: none;
        border: none;
        padding: 0;
        cursor: pointer;
    }

    .nav-mobile-back svg {
        width: 20px;
        height: 20px;
    }

    .nav-mobile-models-title {
        font-size: var(--text-base);
        font-weight: var(--font-semibold);
        color: var(--text-primary);
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }

    .nav-mobile-close {
        display: none;
    }

    /* ---- Mobile Model List Items ---- */
    .nav-mobile-model-list {
        display: flex;
        flex-direction: column;
    }

    .nav-mobile-model-item {
        display: flex;
        align-items: center;
        gap: var(--space-4);
        padding: var(--space-5) 0;
        border-bottom: 1px solid var(--border-light);
    }

    .nav-mobile-model-item img {
        width: 100px;
        height: 64px;
        object-fit: contain;
        flex-shrink: 0;
    }

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

    .nav-mobile-model-name {
        font-size: var(--text-lg);
        font-weight: var(--font-semibold);
        color: var(--text-primary);
    }

    .nav-mobile-model-price {
        font-size: var(--text-xs);
        font-weight: var(--font-semibold);
        color: var(--text-primary);
    }

    .nav-mobile-model-price .price-from {
        font-weight: var(--font-light);
    }

    .nav-mobile-model-links {
        display: flex;
        gap: var(--space-4);
    }

    .nav-mobile-model-links a {
        font-size: var(--text-sm);
        font-weight: var(--font-medium);
        color: var(--text-secondary);
        transition: color var(--transition-fast);
    }

    .nav-mobile-model-links a:hover {
        color: var(--text-primary);
    }

    .nav-mobile-model-links span {
        font-size: var(--text-sm);
        color: var(--text-tertiary);
    }
}

/* ===========================================
   Logo link + dual-logo support
   =========================================== */

.nav-logo-link {
    display: flex;
    align-items: center;
    z-index: 10;
    flex-shrink: 0;
}

img.nav-logo {
    display: block;
    height: 42px;
    width: auto;
    object-fit: contain;
    transition: opacity var(--transition-base);
}

img.nav-logo--light {
    display: none;
}

img.nav-logo--dark {
    display: block;
}

/* Additional mobile nav list helper */
.nav-menu-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-6) 0;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    list-style: none;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    img.nav-logo {
        height: 36px;
    }
}

/* ===========================================
   Mobile nav div overlay (hide on desktop)
   =========================================== */

@media (min-width: 769px) {
    div.nav-menu {
        display: none !important;
    }
}

/* ===========================================
   Span-based hamburger (used instead of .hamburger class)
   =========================================== */

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform 0.3s ease, opacity 0.2s ease;
    margin: 5px 0;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===========================================
   Nav model link (used in dropdown + mobile panel)
   =========================================== */

.nav-model-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background-color var(--transition-fast);
    min-width: 160px;
}

.nav-model-link:hover {
    background-color: var(--color-gray-50);
}

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

.nav-model-name {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.nav-model-tagline {
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

/* Mobile Book Button */
.nav-mobile-book {
    margin-top: var(--space-6);
    width: 100%;
    text-align: center;
}

/* Mobile menu links list */
.nav-menu-links {
    display: flex;
    flex-direction: column;
    list-style: none;
    padding: 0;
}

.nav-menu-links li {
    border-bottom: 1px solid var(--border-light);
}

.nav-menu-links .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-5) 0;
    font-size: var(--text-base);
    font-weight: var(--font-medium);
}

/* Mobile models panel links */
.nav-mobile-models .nav-model-link {
    padding: var(--space-5) 0;
    border-bottom: 1px solid var(--border-light);
    border-radius: 0;
    min-width: unset;
    width: 100%;
}

.nav-mobile-models .nav-model-link:hover {
    background-color: transparent;
}

.nav-mobile-back {
    padding: var(--space-5) 0;
    margin-bottom: var(--space-4);
}