/**
 * Unified Navigation Styles
 * Consistent navigation component across all pages
 */

/* ========== Base Navigation ========== */
.site-nav {
    background: var(--color-surface, #ffffff);
    border-bottom: 1px solid var(--color-border, rgba(0, 0, 0, 0.1));
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 1rem 1.25rem;
    color: var(--color-text, #1f2937);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    border-radius: 6px;
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--color-primary-light, rgba(59, 130, 246, 0.1));
    color: var(--color-primary, #3b82f6);
}

.nav-item.active > .nav-link {
    color: var(--color-primary, #3b82f6);
    font-weight: 600;
}

/* ========== Dropdown Menus ========== */
.nav-item--dropdown {
    position: relative;
}

.nav-link--dropdown {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    padding: 1rem 1.25rem;
    color: var(--color-text, #1f2937);
    font-weight: 500;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-link--dropdown:hover {
    background: var(--color-primary-light, rgba(59, 130, 246, 0.1));
    color: var(--color-primary, #3b82f6);
}

.nav-arrow {
    transition: transform 0.2s ease;
    font-size: 0.75em;
}

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

.nav-submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-surface, #ffffff);
    border: 1px solid var(--color-border, rgba(0, 0, 0, 0.1));
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    min-width: 220px;
    list-style: none;
    margin: 0.25rem 0 0 0;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 1001;
}

.nav-item--dropdown.open .nav-submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-subitem {
    margin: 0;
}

.nav-sublink {
    display: flex;
    flex-direction: column;
    padding: 0.75rem 1.25rem;
    color: var(--color-text, #1f2937);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

.nav-sublink:hover {
    background: var(--color-primary-light, rgba(59, 130, 246, 0.1));
    color: var(--color-primary, #3b82f6);
}

.nav-subdesc {
    font-size: 0.8rem;
    color: var(--color-text-secondary, #6b7280);
    margin-top: 0.25rem;
}

.nav-subitem.active .nav-sublink {
    color: var(--color-primary, #3b82f6);
    font-weight: 600;
}

/* ========== Language Toggle ========== */
.nav-item--lang {
    margin-left: auto;
}

.lang-toggle {
    display: flex;
    gap: 0.25rem;
    background: var(--color-background, #f9fafb);
    padding: 0.25rem;
    border-radius: 8px;
}

.lang-btn {
    padding: 0.5rem 0.75rem;
    background: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text-secondary, #6b7280);
    transition: all 0.2s ease;
}

.lang-btn:hover {
    background: var(--color-surface, #ffffff);
    color: var(--color-text, #1f2937);
}

.lang-btn.active {
    background: var(--color-primary, #3b82f6);
    color: white;
    box-shadow: 0 1px 3px rgba(59, 130, 246, 0.3);
}

/* ========== Mobile Navigation ========== */
@media (max-width: 768px) {
    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    
    .nav-link,
    .nav-link--dropdown {
        padding: 0.875rem 1rem;
    }
    
    .nav-submenu {
        position: static;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--color-primary, #3b82f6);
        margin-left: 1rem;
        transform: none;
        background: var(--color-background, #f9fafb);
    }
    
    .nav-item--dropdown.open .nav-submenu {
        transform: none;
    }
    
    .nav-item--lang {
        margin-left: 0;
        border-top: 1px solid var(--color-border, rgba(0, 0, 0, 0.1));
        padding-top: 0.5rem;
        margin-top: 0.5rem;
    }
    
    .lang-toggle {
        justify-content: center;
        margin: 0.5rem 1rem;
    }
}

/* ========== Mobile Menu Button ========== */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1002;
    background: var(--color-primary, #3b82f6);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.75rem;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: all 0.2s ease;
}

.mobile-menu-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
    display: block;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .site-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        overflow-y: auto;
    }
    
    .site-nav.open {
        transform: translateX(0);
    }
}

/* ========== Compact Navigation (for app pages) ========== */
.app-nav {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.app-nav__link {
    padding: 0.5rem 1rem;
    background: var(--color-background, #f9fafb);
    color: var(--color-text, #1f2937);
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.app-nav__link:hover {
    background: var(--color-primary-light, rgba(59, 130, 246, 0.1));
    color: var(--color-primary, #3b82f6);
    border-color: var(--color-primary, #3b82f6);
}

.app-nav__link.active {
    background: var(--color-primary, #3b82f6);
    color: white;
}