/*
 * Spineboshara.com - Navigation Component
 * Responsive navigation with mobile hamburger menu
 * Version: 1.0.0
 */

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

.header,
.site-header {
    background-color: var(--background-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-index-sticky);
    transition: all var(--transition-base);
}

.header.scrolled,
.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    min-height: 50px;
}

/* Logo */
.logo,
.site-branding {
    flex-shrink: 0;
}

.logo a,
.site-logo {
    text-decoration: none;
    color: var(--primary-color);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin: 0;
    transition: color var(--transition-base);
}

.logo a:hover .logo-text,
.logo a:focus .logo-text,
.site-logo:hover .logo-text,
.site-logo:focus .logo-text {
    color: var(--secondary-color);
}

.logo-subtitle {
    display: block;
    font-size: 0.875rem;
    font-weight: var(--font-weight-normal);
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none; /* Hidden on desktop */
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: var(--z-index-fixed);
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: var(--border-radius-full);
    transition: all var(--transition-base);
}

/* Hamburger animation when menu is open */
.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(7px, -6px);
}

/* Navigation */
.navigation,
.main-navigation {
    display: flex;
    align-items: center;
}

.nav-list,
.nav-menu {
    display: flex;
    flex-direction: row !important; /* Force horizontal layout on desktop */
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
    border-radius: var(--border-radius-sm);
    position: relative;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--secondary-color);
    text-decoration: none;
    background-color: var(--background-secondary);
}

/* Active nav link */
.nav-link.active {
    color: var(--secondary-color);
    font-weight: var(--font-weight-semibold);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 2px;
    background-color: var(--secondary-color);
}

/* CTA Button in Navigation */
.nav-link.cta-button {
    background-color: var(--secondary-color);
    color: var(--background-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-md);
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
}

.nav-link.cta-button:hover,
.nav-link.cta-button:focus {
    background-color: var(--secondary-dark);
    color: var(--background-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   BREADCRUMB NAVIGATION
   ======================================== */

.breadcrumb-container {
    background-color: var(--background-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-xs);
    align-items: center;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    font-size: var(--font-size-small);
}

.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.breadcrumb-item a:hover,
.breadcrumb-item a:focus {
    color: var(--secondary-color);
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
}

.breadcrumb-separator {
    margin: 0 var(--spacing-xs);
    color: var(--text-light);
}

/* ========================================
   MOBILE RESPONSIVE (< 768px)
   ======================================== */

@media (max-width: 767px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .navigation {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--background-primary);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
    }
    
    .navigation.active {
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .nav-list,
    .nav-menu {
        flex-direction: column !important;
        gap: 0;
        width: 100%;
        padding: var(--spacing-md) 0;
    }
    
    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-item:last-child {
        border-bottom: none;
    }
    
    .nav-link {
        padding: var(--spacing-md) var(--spacing-lg);
        width: 100%;
    }
    
    .nav-link.cta-button {
        margin: var(--spacing-md) var(--spacing-lg);
        width: calc(100% - 2 * var(--spacing-lg));
        text-align: center;
    }
    
    .nav-link.active::after {
        display: none;
    }
}

/* ========================================
   TABLET (768px - 1023px)
   ======================================== */

@media (min-width: 768px) and (max-width: 1023px) {
    .nav-list,
    .nav-menu {
        flex-direction: row !important;
        gap: var(--spacing-sm);
    }

    .nav-link {
        font-size: var(--font-size-small);
        padding: var(--spacing-xs);
    }

    .nav-link.cta-button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-small);
    }
}

/* ========================================
   DESKTOP (1024px and up)
   ======================================== */

@media (min-width: 1024px) {
    .header-content {
        padding: var(--spacing-md) 0;
    }

    .nav-list,
    .nav-menu {
        flex-direction: row !important;
        gap: var(--spacing-lg);
    }

    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* ========================================
   ACCESSIBILITY ENHANCEMENTS
   ======================================== */

/* Focus visible for keyboard navigation */
.mobile-menu-toggle:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: 4px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .header,
    .navigation,
    .nav-link,
    .hamburger-line,
    .mobile-menu-toggle {
        transition: none;
    }
}