/* ==========================================================================
   Shared Navigation Styles
   ========================================================================== */

:root {
    --nav-bg: #ffffff;
    --nav-border: #e0e0e0;
    --nav-text: #1a1a1a;
    --nav-text-hover: #0d7377;
    --nav-accent: #0d7377;
}

/* ==========================================================================
   Navigation Container
   ========================================================================== */

.site-nav {
    background: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
    padding: 0.75rem 1rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* ==========================================================================
   Hamburger Menu (Mobile Only)
   ========================================================================== */

.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--nav-text);
}

.nav-toggle svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* ==========================================================================
   Main Navigation Menu
   ========================================================================== */

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 1.5rem;
    align-items: center;
}

.nav-menu > li {
    margin: 0;
    position: relative;
}

.nav-menu a,
.nav-dropdown-toggle {
    text-decoration: none;
    color: var(--nav-text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-menu a:hover,
.nav-dropdown-toggle:hover {
    color: var(--nav-accent);
    background: rgba(13, 115, 119, 0.05);
}

.nav-menu a.active {
    color: var(--nav-accent);
    font-weight: 600;
}

/* ==========================================================================
   Dropdown Navigation
   ========================================================================== */

.nav-dropdown {
    position: relative;
}

.dropdown-arrow {
    font-size: 0.7em;
    transition: transform 0.2s ease;
}

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

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--nav-bg);
    border: 1px solid var(--nav-border);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    list-style: none;
    margin: 0.5rem 0 0 0;
    padding: 0.5rem 0;
    min-width: 160px;
    z-index: 1000;
}

.nav-dropdown.open .nav-dropdown-menu {
    display: block;
}

.nav-dropdown-menu li {
    margin: 0;
}

.nav-dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    border-radius: 0;
    white-space: nowrap;
}

.nav-dropdown-menu a:hover {
    background: rgba(13, 115, 119, 0.08);
}

/* ==========================================================================
   Breadcrumb Navigation
   ========================================================================== */

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    font-size: 0.9rem;
}

.breadcrumb-home {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: var(--nav-text);
    transition: color 0.2s ease;
}

.breadcrumb-home:hover {
    color: var(--nav-accent);
}

.breadcrumb-home svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.breadcrumb-separator {
    color: #999;
    user-select: none;
}

.breadcrumb a {
    text-decoration: none;
    color: var(--nav-text);
    transition: color 0.2s ease;
}

.breadcrumb a:hover {
    color: var(--nav-accent);
    text-decoration: underline;
}

.breadcrumb-current {
    color: #666;
}

/* ==========================================================================
   Mobile Styles (< 768px)
   ========================================================================== */

@media (max-width: 767px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-container {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
    
    /* Hide main menu by default on mobile */
    .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        padding-top: 0.75rem;
        border-top: 1px solid var(--nav-border);
    }
    
    .nav-menu.open {
        display: flex;
    }
    
    .nav-menu a {
        width: 100%;
        padding: 0.75rem;
    }
    
    /* Breadcrumb on mobile */
    .breadcrumb {
        width: 100%;
        order: -1;
        margin-left: 2.5rem;
        font-size: 0.85rem;
    }
}

/* ==========================================================================
   Tablet Styles (768px - 1023px)
   ========================================================================== */

@media (min-width: 768px) and (max-width: 1023px) {
    .nav-menu {
        gap: 1rem;
    }
    
    .nav-menu a {
        font-size: 0.9rem;
        padding: 0.4rem 0.6rem;
    }
    
    .breadcrumb {
        font-size: 0.85rem;
    }
}

/* ==========================================================================
   Desktop Styles (≥ 1024px)
   ========================================================================== */

@media (min-width: 1024px) {
    .site-nav {
        padding: 1rem 1.5rem;
    }
}