/**
 * Modern Navigation System
 * Mobile-first, no Bootstrap dependency
 */

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

.modern-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed, 1030);
    background: var(--bg-primary, #ffffff);
    border-bottom: 1px solid var(--border, #e2e8f0);
    box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,0.05));
    height: var(--header-height-desktop, 72px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-4, 1rem);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    text-decoration: none;
    font-weight: 700;
    font-size: var(--text-lg, 1.125rem);
    transition: opacity 0.2s;
}

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

.nav-logo img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md, 0.5rem);
}

.nav-logo span {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: var(--primary, #6366f1); /* Fallback for browsers that don't support gradient text */
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Dark theme logo text */
[data-theme="dark"] .nav-logo span {
    background: linear-gradient(135deg, #818cf8 0%, #a78bfa 50%, #f472b6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: var(--primary-light, #818cf8); /* Fallback */
}

/* Navigation Items */
.nav-items {
    display: flex;
    align-items: center;
    gap: var(--space-6, 1.5rem);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-secondary, #475569);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-base, 1rem);
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
    border-radius: var(--radius-md, 0.5rem);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: var(--space-2, 0.5rem);
}

.nav-link:hover {
    color: var(--primary, #6366f1);
    background: var(--bg-secondary, #f8fafc);
}

.nav-link.active {
    color: var(--primary, #6366f1);
    background: var(--primary-50, #eef2ff);
}

/* Categories Dropdown */
.nav-item-dropdown {
    position: static;
}

.nav-link-dropdown {
    cursor: pointer;
    user-select: none;
    background: none;
    border: none;
    font-family: inherit;
}

.dropdown-arrow {
    font-size: 0.75rem;
    margin-left: 0.25rem;
    transition: transform 0.2s;
}

/* Mega-Menu */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary, #ffffff);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: var(--radius-lg, 0.75rem);
    box-shadow: var(--shadow-xl, 0 20px 25px rgba(0,0,0,0.1));
    margin-top: var(--space-2, 0.5rem);
    padding: var(--space-6, 1.5rem);
    max-height: 80vh;
    overflow-y: auto;
    z-index: var(--z-dropdown, 1020);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.mega-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mega-menu-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6, 1.5rem);
}

.mega-menu-column {
    min-width: 0;
}

.mega-menu-category-header {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    margin-bottom: var(--space-4, 1rem);
    padding-bottom: var(--space-3, 0.75rem);
    border-bottom: 2px solid var(--border, #e2e8f0);
}

.mega-menu-icon {
    font-size: var(--text-2xl, 1.5rem);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary, #f8fafc);
    border-radius: var(--radius-md, 0.5rem);
}

.mega-menu-category-name {
    font-weight: 600;
    font-size: var(--text-base, 1rem);
    color: var(--text-primary, #0f172a);
}

.mega-menu-tool-count {
    font-size: var(--text-sm, 0.875rem);
    color: var(--text-muted, #94a3b8);
}

.mega-menu-tool-list {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 400px;
    overflow-y: auto;
    overflow-x: hidden;
}

.mega-menu-tool-list::-webkit-scrollbar {
    width: 6px;
}

.mega-menu-tool-list::-webkit-scrollbar-track {
    background: var(--bg-secondary, #f8fafc);
    border-radius: var(--radius-full, 9999px);
}

.mega-menu-tool-list::-webkit-scrollbar-thumb {
    background: var(--border-dark, #cbd5e1);
    border-radius: var(--radius-full, 9999px);
}

.mega-menu-tool-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted, #94a3b8);
}

.mega-menu-tool-list li {
    margin-bottom: var(--space-2, 0.5rem);
}

.mega-menu-tool-link {
    display: flex;
    align-items: center;
    gap: var(--space-2, 0.5rem);
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
    color: var(--text-secondary, #475569);
    text-decoration: none;
    border-radius: var(--radius-md, 0.5rem);
    font-size: var(--text-sm, 0.875rem);
    transition: all 0.2s;
}

.mega-menu-tool-link:hover {
    background: var(--bg-secondary, #f8fafc);
    color: var(--primary, #6366f1);
    padding-left: var(--space-4, 1rem);
}

.tool-icon-small {
    font-size: 1em;
    line-height: 1;
    flex-shrink: 0;
    width: 1.25em;
    text-align: center;
}

.mega-menu-view-all {
    margin-top: var(--space-3, 0.75rem);
    padding-top: var(--space-3, 0.75rem);
    border-top: 1px solid var(--border, #e2e8f0);
}

.mega-menu-view-all-link {
    display: block;
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
    color: var(--primary, #6366f1);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--text-sm, 0.875rem);
    transition: all 0.2s;
}

.mega-menu-view-all-link:hover {
    color: var(--primary-dark, #4f46e5);
    padding-left: var(--space-4, 1rem);
}

/* Search Bar */
.nav-search {
    position: relative;
    flex: 1;
    max-width: 500px;
    margin: 0 var(--space-6, 1.5rem);
}

.search-input {
    width: 100%;
    padding: var(--space-2, 0.5rem) var(--space-10, 2.5rem) var(--space-2, 0.5rem) var(--space-4, 1rem);
    border: 2px solid var(--border, #e2e8f0);
    border-radius: var(--radius-full, 9999px);
    font-size: var(--text-sm, 0.875rem);
    background: var(--bg-secondary, #f8fafc);
    transition: all 0.2s;
    font-family: var(--font-sans);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary, #6366f1);
    background: var(--bg-primary, #ffffff);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-icon {
    position: absolute;
    right: var(--space-4, 1rem);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted, #94a3b8);
    pointer-events: none;
}

/* Action Buttons */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
}

.btn-nav {
    padding: var(--space-2, 0.5rem) var(--space-4, 1rem);
    border-radius: var(--radius-md, 0.5rem);
    font-size: var(--text-sm, 0.875rem);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2, 0.5rem);
    font-family: var(--font-sans);
}

.btn-nav-primary {
    background: var(--primary, #6366f1);
    color: white;
}

.btn-nav-primary:hover {
    background: var(--primary-dark, #4f46e5);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md, 0 4px 6px rgba(0,0,0,0.1));
}

.btn-nav-secondary {
    background: var(--bg-secondary, #f8fafc);
    color: var(--text-secondary, #475569);
    border: 1px solid var(--border, #e2e8f0);
}

.btn-nav-secondary:hover {
    background: var(--bg-tertiary, #f1f5f9);
    border-color: var(--primary, #6366f1);
    color: var(--primary, #6366f1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-2, 0.5rem);
    cursor: pointer;
    color: var(--text-primary);
    font-size: var(--text-xl, 1.25rem);
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md, 0.5rem);
    transition: background 0.2s;
}

.mobile-menu-toggle:hover {
    background: var(--bg-secondary, #f8fafc);
}

/* Mobile Search Toggle */
.mobile-search-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-2, 0.5rem);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: var(--text-lg, 1.125rem);
}

/* ============================================
   MOBILE NAVIGATION
   ============================================ */

@media (max-width: 991px) {
    .modern-nav {
        height: var(--header-height-mobile, 64px);
    }

    .nav-container {
        padding: 0 var(--space-3, 0.75rem);
    }

    .nav-search {
        display: none;
    }

    .nav-items {
        display: none;
    }

    .nav-actions {
        gap: var(--space-2, 0.5rem);
    }

    .btn-nav {
        padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
        font-size: var(--text-xs, 0.75rem);
    }

    .mobile-menu-toggle,
    .mobile-search-toggle {
        display: flex;
    }

    /* Hide some nav actions on mobile */
    .btn-nav .nav-text {
        display: none;
    }
}

/* Mobile Drawer */
.mobile-drawer {
    position: fixed;
    top: var(--header-height-mobile, 64px);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary, #ffffff);
    z-index: var(--z-modal, 1050);
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    overflow-y: auto;
    box-shadow: var(--shadow-xl, 0 20px 25px rgba(0,0,0,0.1));
}

.mobile-drawer.open {
    transform: translateX(0);
}

.drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop, 1040);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease-in-out;
}

.drawer-overlay.open {
    opacity: 1;
    visibility: visible;
}

.drawer-header {
    padding: var(--space-4, 1rem);
    border-bottom: 1px solid var(--border, #e2e8f0);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.drawer-title {
    font-size: var(--text-lg, 1.125rem);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.drawer-close {
    background: none;
    border: none;
    font-size: var(--text-2xl, 1.5rem);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-1, 0.25rem);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md, 0.5rem);
    transition: all 0.2s;
}

.drawer-close:hover {
    background: var(--bg-secondary, #f8fafc);
    color: var(--text-primary);
}

.drawer-search {
    padding: var(--space-4, 1rem);
    border-bottom: 1px solid var(--border, #e2e8f0);
}

.drawer-content {
    padding: var(--space-4, 1rem);
}

.drawer-section {
    margin-bottom: var(--space-6, 1.5rem);
}

.drawer-section-title {
    font-size: var(--text-sm, 0.875rem);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted, #94a3b8);
    margin-bottom: var(--space-3, 0.75rem);
    padding: 0 var(--space-2, 0.5rem);
}

.drawer-link {
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    padding: var(--space-3, 0.75rem) var(--space-2, 0.5rem);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md, 0.5rem);
    transition: all 0.2s;
    font-size: var(--text-base, 1rem);
}

.drawer-link:hover {
    background: var(--bg-secondary, #f8fafc);
    color: var(--primary, #6366f1);
    padding-left: var(--space-4, 1rem);
}

.drawer-link-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg, 1.125rem);
    flex-shrink: 0;
}

.drawer-empty {
    padding: var(--space-4, 1rem);
    text-align: center;
    color: var(--text-muted, #94a3b8);
    font-size: var(--text-sm, 0.875rem);
    margin: 0;
}

.drawer-loading {
    padding: var(--space-4, 1rem);
    text-align: center;
    color: var(--text-muted, #94a3b8);
    font-size: var(--text-sm, 0.875rem);
    margin: 0;
}

/* Drawer Category Items */
.drawer-category-item {
    margin-bottom: var(--space-2, 0.5rem);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: var(--radius-md, 0.5rem);
    overflow: hidden;
}

.drawer-category-toggle {
    width: 100%;
    padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    background: var(--bg-secondary, #f8fafc);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
    font-family: inherit;
    font-size: var(--text-base, 1rem);
    font-weight: 500;
    color: var(--text-primary, #0f172a);
    transition: background 0.2s;
    text-align: left;
}

.drawer-category-toggle:hover {
    background: var(--bg-tertiary, #f1f5f9);
}

.drawer-category-icon {
    font-size: var(--text-xl, 1.25rem);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.drawer-category-name {
    flex: 1;
    font-weight: 600;
}

.drawer-category-count {
    font-size: var(--text-sm, 0.875rem);
    color: var(--text-muted, #94a3b8);
    background: var(--bg-primary, #ffffff);
    padding: var(--space-1, 0.25rem) var(--space-2, 0.5rem);
    border-radius: var(--radius-full, 9999px);
}

.drawer-category-arrow {
    font-size: var(--text-sm, 0.875rem);
    color: var(--text-muted, #94a3b8);
    transition: transform 0.2s;
}

.drawer-category-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--bg-primary, #ffffff);
}

.drawer-category-content.open {
    max-height: 600px;
    overflow-y: auto;
    overflow-x: hidden;
}

.drawer-category-content.open::-webkit-scrollbar {
    width: 6px;
}

.drawer-category-content.open::-webkit-scrollbar-track {
    background: var(--bg-secondary, #f8fafc);
}

.drawer-category-content.open::-webkit-scrollbar-thumb {
    background: var(--border-dark, #cbd5e1);
    border-radius: var(--radius-full, 9999px);
}

.drawer-category-content.open::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted, #94a3b8);
}

.drawer-category-tools {
    padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    display: flex;
    flex-direction: column;
    gap: var(--space-2, 0.5rem);
}

.drawer-tool-link {
    display: block;
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
    color: var(--text-secondary, #475569);
    text-decoration: none;
    border-radius: var(--radius-md, 0.5rem);
    font-size: var(--text-sm, 0.875rem);
    transition: all 0.2s;
    margin-left: var(--space-8, 2rem);
}

.drawer-tool-link:hover {
    background: var(--bg-secondary, #f8fafc);
    color: var(--primary, #6366f1);
    padding-left: var(--space-4, 1rem);
}

.drawer-view-all {
    display: block;
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
    color: var(--primary, #6366f1);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--text-sm, 0.875rem);
    margin-left: var(--space-8, 2rem);
    margin-top: var(--space-2, 0.5rem);
    transition: all 0.2s;
}

.drawer-view-all:hover {
    color: var(--primary-dark, #4f46e5);
    padding-left: var(--space-4, 1rem);
}

/* Mobile Search Modal */
.mobile-search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary, #ffffff);
    z-index: var(--z-modal, 1050);
    display: none;
    flex-direction: column;
}

.mobile-search-modal.open {
    display: flex;
}

.mobile-search-header {
    padding: var(--space-4, 1rem);
    border-bottom: 1px solid var(--border, #e2e8f0);
    display: flex;
    align-items: center;
    gap: var(--space-3, 0.75rem);
}

.mobile-search-input {
    flex: 1;
    padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
    border: 2px solid var(--border, #e2e8f0);
    border-radius: var(--radius-md, 0.5rem);
    font-size: var(--text-base, 1rem);
    font-family: var(--font-sans);
}

.mobile-search-input:focus {
    outline: none;
    border-color: var(--primary, #6366f1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.mobile-search-close {
    background: none;
    border: none;
    font-size: var(--text-xl, 1.25rem);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-2, 0.5rem);
}

/* Dark Mode Styles */
[data-theme="dark"] .mega-menu {
    background: var(--bg-secondary, #1e293b);
    border-color: var(--border, #334155);
}

[data-theme="dark"] .mega-menu-category-header {
    border-bottom-color: var(--border, #334155);
}

[data-theme="dark"] .mega-menu-icon {
    background: var(--bg-tertiary, #334155);
}

[data-theme="dark"] .mega-menu-tool-link:hover,
[data-theme="dark"] .drawer-tool-link:hover {
    background: var(--bg-tertiary, #334155);
}

[data-theme="dark"] .drawer-category-toggle {
    background: var(--bg-secondary, #1e293b);
}

[data-theme="dark"] .drawer-category-toggle:hover {
    background: var(--bg-tertiary, #334155);
}

[data-theme="dark"] .drawer-category-content {
    background: var(--bg-secondary, #1e293b);
}

[data-theme="dark"] .drawer-category-count {
    background: var(--bg-tertiary, #334155);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 991px) {
    .mega-menu {
        left: var(--space-4, 1rem);
        right: var(--space-4, 1rem);
        max-width: none;
    }
    
    .mega-menu-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767px) {
    .nav-logo span {
        display: inline-block; /* Show on mobile */
        font-size: var(--text-sm, 0.875rem); /* Slightly smaller on mobile */
    }

    .nav-logo {
        font-size: var(--text-base, 1rem);
        gap: var(--space-2, 0.5rem); /* Tighter gap on mobile */
    }
    
    .nav-logo img {
        width: 28px; /* Slightly smaller logo on mobile */
        height: 28px;
    }
    
    .mega-menu {
        display: none; /* Hide mega-menu on mobile, use drawer instead */
    }
}