/* ============================================
   Discovering Da Vinci - Hub Site Styles
   Integrated with itsjustlife.cloud UNI-MENU
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Matching UNI-MENU core palette with DDD gold accent */
    --bg: #0a0a0a;
    --surface: #111;
    --surface-light: #1a1a1a;
    --border: #333;
    --text: #e0e0e0;
    --text-muted: #888;
    
    /* DDD-specific accent (gold) */
    --accent: #c2a070;
    --accent-light: #e3c89a;
    --accent-gold: #d1b182;
    
    /* Typography */
    --font-display: 'Cinzel', serif;
    --font-body: 'Crimson Text', Georgia, serif;
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Layout - Account for UNI-MENU (52px) + DDD SubNav (44px) */
    --uni-menu-height: 52px;
    --subnav-height: 44px;
    --total-header-height: 96px;
    --max-width: 1400px;
    --content-width: 900px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    display: flex;
    flex-direction: column;
}

/* Has UNI-MENU class - adds top padding for the fixed nav */
body.has-uni-menu {
    padding-top: var(--uni-menu-height);
}

/* ============================================
   DDD Sub-Navigation (below UNI-MENU)
   Two-row style matching uni-menu
   ============================================ */

.ddd-subnav {
    position: fixed;
    top: var(--uni-menu-height);
    left: 0;
    right: 0;
    z-index: 900;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

/* Row 1: Main Categories */
.subnav-row1 {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: var(--subnav-height);
}

.subnav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    flex-shrink: 0;
}

.subnav-logo .logo-icon {
    font-size: 1.25rem;
    color: var(--accent-gold);
}

.subnav-logo .logo-text {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-gold);
    letter-spacing: 0.1em;
}

/* Category buttons row */
.subnav-cats {
    display: none;
    flex: 1;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
}

@media (min-width: 900px) {
    .subnav-cats {
        display: flex;
    }
}

.subnav-cat {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    text-decoration: none;
    padding: 8px 12px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 0;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
}

.subnav-cat:hover {
    color: var(--text);
    background: var(--surface-light);
    border-color: var(--border);
}

.subnav-cat.active {
    color: #fff;
    background: #fff;
    color: #000;
    border-color: #fff;
}

.subnav-cat.nav-book {
    color: var(--accent-gold);
    border: 1px solid var(--accent-gold);
    margin-left: auto;
}

.subnav-cat.nav-book:hover {
    background: var(--accent-gold);
    color: var(--bg);
}

/* Row 2: Subcategories panel */
.subnav-row2 {
    display: none;
    padding: 8px;
    background: #0a0a0a;
    border-bottom: 2px solid var(--border);
}

.subnav-row2.expanded {
    display: block;
    animation: slideDown 0.12s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Subcategory groups */
.subnav-subcats {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 4px;
    flex-wrap: wrap;
}

.subnav-subcats.active {
    display: flex;
}

/* Individual subcat buttons */
.subnav-subcat {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: #1a1a1a;
    border: 1px solid #333;
    color: #888;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.15s;
}

.subnav-subcat:hover {
    background: #222;
    border-color: #555;
    color: #fff;
}

.subnav-subcat.active {
    background: #fff;
    border-color: #fff;
    color: #000;
}

.subcat-icon {
    font-size: 12px;
}

/* ============================================
   Old dropdown styles (keeping for reference)
   ============================================ */

.subnav-dropdown .dropdown-toggle .dropdown-arrow {
    font-size: 8px;
    transition: transform var(--transition-fast);
}

.subnav-dropdown:hover .dropdown-toggle .dropdown-arrow {
    transform: rotate(180deg);
}

/* Standard single-column dropdown */
.subnav-dropdown .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 160px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: var(--spacing-xs) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all var(--transition-fast);
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.subnav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Wide Grid Panel (UNI-MENU style) */
.subnav-dropdown .dropdown-panel {
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    min-width: 400px;
    max-width: 600px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: var(--spacing-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

/* Grid Items Container */
.dropdown-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 6px;
}

/* Individual Grid Item (UNI-MENU style) */
.dropdown-grid a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: var(--spacing-sm);
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 4px;
    text-decoration: none;
    transition: all var(--transition-fast);
    min-height: 60px;
}

.dropdown-grid a:hover {
    background: rgba(194, 160, 112, 0.15);
    border-color: var(--accent);
}

.dropdown-grid a .item-icon {
    font-size: 1.25rem;
}

.dropdown-grid a .item-label {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    text-transform: uppercase;
    text-align: center;
    line-height: 1.2;
}

.dropdown-grid a:hover .item-label {
    color: var(--accent);
}

/* Sectioned Panel Layout */
.dropdown-sections {
    display: flex;
    gap: var(--spacing-md);
}

.dropdown-section {
    flex: 1;
    min-width: 0;
}

.dropdown-section-title {
    display: block;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.15em;
    color: var(--accent);
    text-transform: uppercase;
    padding-bottom: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border);
}

.dropdown-section a {
    display: block;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 3px;
    transition: all var(--transition-fast);
}

.dropdown-section a:hover {
    color: var(--accent);
    background: rgba(194, 160, 112, 0.1);
}

/* Standard dropdown link styles */
.subnav-dropdown .dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 0;
    transition: all var(--transition-fast);
}

.subnav-dropdown .dropdown-menu a:hover {
    background: rgba(194, 160, 112, 0.15);
    color: var(--accent);
}

/* Mobile Menu Toggle */
.subnav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    margin-left: auto;
}

@media (min-width: 900px) {
    .subnav-toggle {
        display: none;
    }
}

.subnav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    transition: all var(--transition-fast);
}

.subnav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

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

.subnav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* Mobile Drawer */
.ddd-mobile-drawer {
    position: fixed;
    top: var(--total-header-height);
    left: 0;
    right: 0;
    max-height: 0;
    overflow: hidden;
    overflow-y: auto;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    z-index: 899;
    transition: max-height var(--transition-normal);
}

.ddd-mobile-drawer.active {
    max-height: 70vh;
}

.drawer-content {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
}

.drawer-content a {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--text);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-fast);
}

.drawer-content a:last-child {
    border-bottom: none;
}

.drawer-content a:hover,
.drawer-content a.active {
    color: var(--accent);
    padding-left: var(--spacing-lg);
}

.drawer-content a.nav-book {
    color: var(--accent-gold);
    border: 1px solid var(--accent-gold);
    border-radius: 4px;
    text-align: center;
    margin-top: var(--spacing-md);
}

/* Drawer Sections */
.drawer-section {
    margin: var(--spacing-sm) 0;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border);
}

.drawer-section-title {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.625rem;
    letter-spacing: 0.15em;
    color: var(--accent);
    padding: var(--spacing-xs) var(--spacing-md);
    text-transform: uppercase;
}

.drawer-section a {
    font-size: 0.7rem;
    padding-left: var(--spacing-lg);
    border-bottom: none;
    color: var(--text-muted);
}

.drawer-section a:hover {
    color: var(--accent);
    padding-left: calc(var(--spacing-lg) + var(--spacing-sm));
}

/* ============================================
   Main Content
   ============================================ */

.main-content {
    flex: 1;
    margin-top: var(--subnav-height);
    padding: var(--spacing-xxl) var(--spacing-lg);
}

.content-container {
    max-width: var(--content-width);
    margin: 0 auto;
    min-height: 60vh;
}

/* Loading Spinner */
.loading-spinner {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xxl);
    color: var(--text-muted);
}

.loading-spinner.active {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Content Article */
.content-article {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Markdown Content Styles */
.content-article h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--accent-gold);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.content-article h2 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--accent-light);
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
}

.content-article h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--text);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.content-article p {
    margin-bottom: var(--spacing-lg);
}

.content-article a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.content-article a:hover {
    color: var(--accent-light);
}

.content-article ul,
.content-article ol {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
}

.content-article li {
    margin-bottom: var(--spacing-sm);
}

.content-article blockquote {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    border-left: 4px solid var(--accent);
    background: var(--surface);
    font-style: italic;
}

.content-article img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: var(--spacing-lg) 0;
}

.content-article code {
    font-family: var(--font-mono);
    background: var(--surface);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

.content-article pre {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: 8px;
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

.content-article pre code {
    background: none;
    padding: 0;
}

.content-article hr {
    border: none;
    height: 1px;
    background: var(--border);
    margin: var(--spacing-xxl) 0;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.site-footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--accent);
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

.footer-links .divider {
    margin: 0 var(--spacing-sm);
    color: var(--text-muted);
}

/* ============================================
   Utility Classes
   ============================================ */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}