:root {
    /* Core Color System - Updated */
    --color-primary: #7c3aed;        /* Vibrant Purple */
    --color-primary-light: #8b5cf6;  /* Lighter Purple */
    --color-primary-dark: #6d28d9;   /* Darker Purple */
    --color-secondary: #2563eb;      /* Vibrant Blue */
    --color-secondary-light: #3b82f6; /* Lighter Blue */
    --color-accent: #a855f7;         /* Soft Purple Accent */
    --color-accent-light: #c084fc;   /* Light Purple Accent */
    
    /* White & Background Variations - All visible on white bg */
    --color-white: #ffffff;
    --color-white-98: #fafafa;
    --color-white-95: #f5f5f5;
    --color-white-90: #e5e5e5;
    --color-white-80: #d4d4d4;
    --color-white-60: #a3a3a3;
    --color-white-40: #737373;
    --color-white-20: #525252;
    --color-white-10: #404040;
    
    /* Gray Scale - High contrast for readability */
    --color-gray-900: #000000;       /* Pure black for primary text */
    --color-gray-800: #111827;       /* Near black for headings */
    --color-gray-700: #1f2937;       /* Dark gray for body text */
    --color-gray-600: #374151;       /* Medium-dark for secondary text */
    --color-gray-500: #4b5563;       /* Medium gray */
    --color-gray-400: #6b7280;       /* Lighter medium */
    --color-gray-300: #9ca3af;       /* Light gray */
    --color-gray-200: #e5e7eb;       /* Very light gray for borders */
    --color-gray-100: #f3f4f6;       /* Off-white for backgrounds */
    --color-gray-50: #f9fafb;        /* Lightest gray */
    
    /* Purple Theme Colors (Light variants for backgrounds) */
    --color-purple-light: #f5f3ff;   /* Very light purple bg */
    --color-purple-light-2: #ede9fe; /* Light purple bg */
    --color-purple-light-3: #ddd6fe; /* Medium-light purple */
    
    /* Blue Theme Colors (Light variants for backgrounds) */
    --color-light-blue: #eff6ff;     /* Very light blue bg */
    --color-light-blue-2: #dbeafe;   /* Light blue bg */
    --color-light-blue-3: #bfdbfe;   /* Medium-light blue */
    --color-light-blue-accent: #2563eb; /* Blue accent */
    
    /* Gradients - Updated with purple/blue */
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    --gradient-light: linear-gradient(135deg, rgba(124, 58, 237, 0.08) 0%, rgba(37, 99, 235, 0.08) 100%);
    --gradient-light-blue: linear-gradient(135deg, rgba(239, 246, 255, 0.9) 0%, rgba(245, 243, 255, 0.9) 100%);
    --gradient-code-bg: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-purple-light) 100%);
    
    /* Shadows - With purple/blue tint */
    --shadow-sm: 0 2px 4px rgba(124, 58, 237, 0.05);
    --shadow-md: 0 4px 12px rgba(124, 58, 237, 0.08);
    --shadow-lg: 0 8px 24px rgba(124, 58, 237, 0.12);
    --shadow-xl: 0 12px 36px rgba(124, 58, 237, 0.15);
    --shadow-code: 0 4px 16px rgba(37, 99, 235, 0.1);
    
    /* Borders - With purple/blue tint */
    --border-light: rgba(124, 58, 237, 0.15);
    --border-medium: rgba(124, 58, 237, 0.25);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Typography */
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    
    /* Code Block */
    --code-bg: var(--color-gray-50);
    --code-border: var(--color-gray-200);
    --code-text: var(--color-gray-800);
    --code-font: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', 'Courier New', monospace;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.7;
    color: var(--color-gray-700);
    background: var(--color-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   CORE LAYOUT - BEM MODEL
   ============================================ */

/* Page Container */
.page {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
}

.page--narrow {
    max-width: 800px;
}

.page--full {
    max-width: 100%;
    padding: 0;
}

/* Section */
.section {
    padding: var(--spacing-xl) 0;
}

.section--hero {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--gradient-light-blue);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-light);
}

.section--header {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section--header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.section--content {
    padding: var(--spacing-lg) 0;
}

/* Heading */
.heading {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
}

.heading--hero {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
}

.heading--page {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-gray-200);
    position: relative;
}

.heading--page::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 2px;
    background: var(--gradient-primary);
}

.heading--section {
    font-size: var(--font-size-2xl);
    margin: var(--spacing-lg) 0 var(--spacing-md);
    padding-left: var(--spacing-sm);
    border-left: 4px solid var(--color-secondary);
}

.heading--subsection {
    font-size: var(--font-size-xl);
    color: var(--color-gray-800);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    line-height: 1.4;
}

.heading--subsubsection {
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
    margin: var(--spacing-md) 0 var(--spacing-sm);
    line-height: 1.4;
}

.heading--minor {
    font-size: var(--font-size-md);
    color: var(--color-gray-600);
    margin: var(--spacing-md) 0 var(--spacing-xs);
    line-height: 1.4;
}

.heading--small {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin: var(--spacing-md) 0 var(--spacing-xs);
    line-height: 1.4;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Text */
.text {
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-700);
    font-size: var(--font-size-md);
}

.text--justify {
    text-align: justify;
}

.text--hero {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.text--small {
    font-size: var(--font-size-sm);
}

.text--muted {
    color: var(--color-gray-500);
}

/* Meta */
.meta {
    display: inline-block;
    background: var(--color-purple-light);
    color: var(--color-primary-dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin: 0 var(--spacing-xs);
    border: 1px solid var(--color-purple-light-3);
}

.meta:first-child {
    margin-left: 0;
}

.meta--block {
    display: block;
    margin: var(--spacing-xs) 0;
    width: 100%;
}

/* ============================================
   CARD COMPONENT - BEM
   ============================================ */

.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition-base);
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-light);
}

.card:hover::before {
    transform: scaleX(1);
}

.card--grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
}

.card--list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.card__title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
    font-weight: 600;
}

.card__title a {
    color: var(--color-gray-900);
    text-decoration: none;
    transition: color var(--transition-fast);
    display: block;
}

.card__title a:hover {
    color: var(--color-primary);
}

.card__meta {
    display: block;
    color: var(--color-gray-500);
    font-size: var(--font-size-xs);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.card__author {
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.card__body {
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

.card__footer {
    margin-top: auto;
}

/* ============================================
   LINK COMPONENT - BEM
   ============================================ */

.link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
}

.link--readmore {
    padding: var(--spacing-sm) 0;
    border-top: 1px solid var(--color-gray-200);
    margin-top: auto;
}

.link--readmore::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.link--readmore:hover {
    color: var(--color-primary-dark);
    padding-left: var(--spacing-xs);
}

.link--readmore:hover::after {
    transform: translateX(4px);
}

.link--back {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-purple-light);
    color: var(--color-primary-dark);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    border: 1px solid var(--color-purple-light-3);
}

.link--back::before {
    content: '←';
}

.link--back:hover {
    background: var(--gradient-light);
    color: var(--color-primary);
    transform: translateX(-4px);
    border-color: var(--color-primary-light);
}

.link--content {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    border-bottom: 2px solid transparent;
    padding-bottom: 1px;
}

.link--content:hover {
    color: var(--color-primary-dark);
    border-bottom-color: var(--color-primary-light);
}

/* ============================================
   NAVIGATION COMPONENT - BEM
   ============================================ */

.navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--color-gray-200);
    gap: var(--spacing-md);
}

.navigation__item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition-base);
    flex: 1;
    max-width: 48%;
    background: var(--color-white);
}

.navigation__item:hover {
    background: var(--color-purple-light);
    border-color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.navigation__item--prev {
    text-align: left;
    justify-content: flex-start;
}

.navigation__item--next {
    text-align: right;
    justify-content: flex-end;
}

.navigation__item--prev::before {
    content: "←";
    font-weight: bold;
}

.navigation__item--next::after {
    content: "→";
    font-weight: bold;
}

/* ============================================
   CONTENT COMPONENT - BEM (Markdown Content)
   ============================================ */

.content {
    padding: var(--spacing-lg) 0;
}

/* Headings with improved hierarchy */
.content h1 {
    font-size: var(--font-size-3xl);
    color: var(--color-gray-900);
    margin: var(--spacing-xl) 0 var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-gray-200);
    line-height: 1.2;
    font-weight: 700;
    position: relative;
}

.content h1::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 2px;
    background: var(--gradient-primary);
}

.content h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-gray-900);
    margin: var(--spacing-lg) 0 var(--spacing-md);
    line-height: 1.3;
    font-weight: 600;
    padding-left: var(--spacing-sm);
    border-left: 4px solid var(--color-secondary);
}

.content h3 {
    font-size: var(--font-size-xl);
    color: var(--color-gray-800);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    line-height: 1.4;
    font-weight: 600;
}

.content h4 {
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
    margin: var(--spacing-md) 0 var(--spacing-sm);
    line-height: 1.4;
    font-weight: 600;
}

.content h5 {
    font-size: var(--font-size-md);
    color: var(--color-gray-600);
    margin: var(--spacing-md) 0 var(--spacing-xs);
    line-height: 1.4;
    font-weight: 600;
}

.content h6 {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin: var(--spacing-md) 0 var(--spacing-xs);
    line-height: 1.4;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* Paragraphs */
.content p {
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-700);
    font-size: var(--font-size-md);
    text-align: justify;
}

/* Inline Code */
.content code:not(pre code) {
    background: var(--color-purple-light);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-family: var(--code-font);
    font-size: 0.9em;
    color: var(--color-primary-dark);
    border: 1px solid var(--color-purple-light-3);
    font-weight: 500;
}

/* Code Blocks - Enhanced */
.content pre {
    background: var(--gradient-code-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
    border: 2px solid var(--color-purple-light-2);
    position: relative;
    box-shadow: var(--shadow-code);
}

.content pre::before {
    content: attr(data-language);
    position: absolute;
    top: -12px;
    left: var(--spacing-lg);
    background: var(--color-secondary);
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.content pre code {
    background: none;
    padding: 0;
    color: var(--code-text);
    font-size: 0.95em;
    border: none;
    font-family: var(--code-font);
    line-height: 1.6;
}

/* Code Block Language-specific Styling */
.content pre[class*="language-"]::before {
    content: attr(class);
    background: var(--gradient-primary);
}

.content pre.language-javascript::before {
    background: #f7df1e;
    color: #000;
}

.content pre.language-typescript::before {
    background: #3178c6;
}

.content pre.language-python::before {
    background: #3776ab;
}

.content pre.language-java::before {
    background: #007396;
}

.content pre.language-cpp::before {
    background: #00599c;
}

.content pre.language-go::before {
    background: #00add8;
}

.content pre.language-rust::before {
    background: #000;
}

.content pre.language-psql::before,
.content pre.language-sql::before {
    background: #336791;
}

.content pre.language-html::before {
    background: #e34f26;
}

.content pre.language-css::before {
    background: #1572b6;
}

.content pre.language-bash::before {
    background: #4eaa25;
}

.content pre.language-json::before {
    background: #f5de19;
    color: #000;
}

.content pre.language-yaml::before {
    background: #cb171e;
}

/* Code Block Copy Button - Enhanced */
.content pre {
    position: relative;
}

.content__copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--color-white);
    color: var(--color-gray-600);
    padding: 6px 14px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--color-gray-300);
    transition: all var(--transition-fast);
    opacity: 0;
    transform: translateY(-10px);
    z-index: 10;
}

.content pre:hover .content__copy-btn {
    opacity: 1;
    transform: translateY(0);
}

.content__copy-btn:hover {
    background: var(--color-purple-light);
    color: var(--color-primary);
    border-color: var(--color-purple-light-3);
}

.content__copy-btn.copied {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* Enhanced Syntax Highlighting */
.content .hljs {
    background: transparent !important;
    padding: 0 !important;
}

/* Highlight.js Theme - Purple/Blue Theme */
.hljs-comment,
.hljs-quote {
    color: var(--color-gray-500);
    font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
    color: var(--color-primary);
    font-weight: 600;
}

.hljs-number,
.hljs-literal,
.hljs-variable,
.hljs-template-variable,
.hljs-tag .hljs-attr {
    color: var(--color-secondary);
    font-weight: 500;
}

.hljs-string,
.hljs-doctag {
    color: var(--color-accent);
}

.hljs-title,
.hljs-section,
.hljs-selector-id {
    color: var(--color-primary-dark);
    font-weight: 700;
}

.hljs-subst {
    font-weight: 400;
}

.hljs-type,
.hljs-class .hljs-title {
    color: var(--color-secondary);
    font-weight: 600;
}

.hljs-tag,
.hljs-name,
.hljs-attribute {
    color: var(--color-primary);
    font-weight: 500;
}

.hljs-regexp,
.hljs-link {
    color: var(--color-accent-light);
}

.hljs-symbol,
.hljs-bullet {
    color: var(--color-primary-light);
}

.hljs-built_in,
.hljs-builtin-name {
    color: var(--color-secondary);
    font-weight: 600;
}

.hljs-meta {
    color: var(--color-gray-600);
    font-weight: 600;
}

.hljs-deletion {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.hljs-addition {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.hljs-emphasis {
    font-style: italic;
}

.hljs-strong {
    font-weight: 700;
}

/* SQL-specific highlighting */
.language-sql .hljs-keyword,
.language-psql .hljs-keyword {
    color: #336791;
    font-weight: 700;
}

.language-sql .hljs-built_in,
.language-psql .hljs-built_in {
    color: var(--color-accent);
    font-weight: 600;
}

/* Blockquotes - Enhanced */
.content blockquote {
    border-left: 4px solid var(--color-secondary);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    color: var(--color-gray-600);
    background: var(--color-purple-light);
    padding: var(--spacing-lg);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-style: italic;
    font-size: var(--font-size-md);
    position: relative;
    border-top: 1px solid var(--color-purple-light-2);
    border-right: 1px solid var(--color-purple-light-2);
    border-bottom: 1px solid var(--color-purple-light-2);
}

.content blockquote::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: var(--spacing-md);
    font-size: 4rem;
    color: var(--color-purple-light-3);
    font-family: Georgia, serif;
    line-height: 1;
}

.content blockquote p:last-child {
    margin-bottom: 0;
}

/* Links */
.content a:not(.link--readmore, .link--back, .navigation__item) {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    border-bottom: 2px solid transparent;
    padding-bottom: 1px;
}

.content a:not(.link--readmore, .link--back, .navigation__item):hover {
    color: var(--color-primary-dark);
    border-bottom-color: var(--color-primary-light);
}

/* Lists - Enhanced */
.content ul,
.content ol {
    margin: var(--spacing-lg) 0;
    padding-left: var(--spacing-xl);
}

.content li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
    color: var(--color-gray-700);
    font-size: var(--font-size-md);
    position: relative;
}

.content ul li::before {
    content: '•';
    color: var(--color-secondary);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
    position: absolute;
    left: 0;
}

.content ol {
    counter-reset: item;
}

.content ol li {
    counter-increment: item;
}

.content ol li::before {
    content: counter(item) '.';
    color: var(--color-secondary);
    font-weight: bold;
    display: inline-block;
    width: 1.5em;
    margin-left: -2em;
    position: absolute;
    left: 0;
    text-align: right;
}

.content li > ul,
.content li > ol {
    margin-top: var(--spacing-sm);
    margin-bottom: 0;
}

/* Tables - Enhanced with overflow wrapper */
.content .table-wrapper {
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.content table {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-gray-200);
    background: var(--color-white);
    min-width: 600px;
}

.content thead {
    background: linear-gradient(135deg, var(--color-purple-light) 0%, var(--color-light-blue) 100%);
}

.content th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 700;
    color: var(--color-gray-800);
    border-bottom: 2px solid var(--color-purple-light-3);
    font-size: var(--font-size-sm);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.content th::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
}

.content th:hover::after {
    transform: translateX(0);
}

.content td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
    color: var(--color-gray-700);
    transition: background-color var(--transition-fast);
    font-size: var(--font-size-sm);
}

.content tbody tr {
    transition: all var(--transition-fast);
}

.content tbody tr:hover {
    background: var(--color-purple-light);
    transform: translateX(4px);
}

.content tbody tr:last-child td {
    border-bottom: none;
}

.content tbody tr:nth-child(even) {
    background: var(--color-gray-50);
}

.content tbody tr:nth-child(even):hover {
    background: var(--color-purple-light);
}

/* Images - Enhanced */
.content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin: var(--spacing-xl) 0;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--color-white);
    display: block;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.content img:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-xl);
}

.content img.align-center {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.content img.align-left {
    float: left;
    margin-right: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    max-width: 50%;
}

.content img.align-right {
    float: right;
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    max-width: 50%;
}

/* Image Captions */
.content figure {
    margin: var(--spacing-xl) 0;
    text-align: center;
}

.content figure img {
    margin-bottom: 0;
}

.content figcaption {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    font-style: italic;
    margin-top: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-purple-light);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    display: inline-block;
    max-width: 80%;
}

/* Horizontal Rule - Enhanced */
.content hr {
    border: none;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--color-purple-light-3) 50%,
        transparent 100%);
    margin: var(--spacing-xl) 0;
    position: relative;
}

.content hr::before {
    content: '※';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--color-white);
    padding: 0 1rem;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
}

/* Definition Lists */
.content dl {
    margin: var(--spacing-xl) 0;
    background: var(--color-purple-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-purple-light-2);
}

.content dt {
    font-weight: 700;
    color: var(--color-gray-900);
    margin-top: var(--spacing-md);
    font-size: var(--font-size-md);
    color: var(--color-secondary);
}

.content dt:first-child {
    margin-top: 0;
}

.content dd {
    margin-left: var(--spacing-lg);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-md);
    padding-left: var(--spacing-sm);
    border-left: 2px solid var(--color-purple-light-3);
}

/* Abbreviations */
.content abbr {
    border-bottom: 2px dotted var(--color-secondary);
    cursor: help;
    text-decoration: none;
    font-weight: 600;
}

/* Keyboard Keys */
.content kbd {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 100%);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 0 var(--color-gray-300), inset 0 -1px 0 var(--color-gray-300);
    color: var(--color-gray-800);
    display: inline-block;
    font-family: var(--code-font);
    font-size: 0.85em;
    line-height: 1;
    padding: 0.3em 0.6em;
    margin: 0 0.2em;
    white-space: nowrap;
    position: relative;
    top: -1px;
}

/* Mark/Highlight */
.content mark {
    background: linear-gradient(120deg, 
        rgba(253, 224, 71, 0.4) 0%, 
        rgba(253, 224, 71, 0.4) 100%);
    padding: 0.1em 0.4em;
    border-radius: 3px;
    color: var(--color-gray-900);
    font-weight: 500;
}

/* Small Text */
.content small {
    font-size: 0.875em;
    color: var(--color-gray-600);
    opacity: 0.8;
}

/* Superscript/Subscript */
.content sup,
.content sub {
    font-size: 0.75em;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

.content sup {
    top: -0.5em;
    color: var(--color-primary);
}

.content sub {
    bottom: -0.25em;
    color: var(--color-secondary);
}

/* Task Lists - Enhanced */
.content input[type="checkbox"] {
    margin-right: var(--spacing-sm);
    transform: scale(1.3);
    accent-color: var(--color-secondary);
    cursor: pointer;
}

.content input[type="checkbox"]:checked {
    accent-color: var(--color-primary);
}

/* ============================================
   UTILITY COMPONENTS - BEM
   ============================================ */

/* Code Block Container */
.code-block {
    position: relative;
    margin: var(--spacing-xl) 0;
}

.code-block__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-purple-light);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border: 1px solid var(--color-purple-light-2);
    border-bottom: none;
}

.code-block__language {
    color: var(--color-secondary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Callout Boxes */
.callout {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) 0;
    border-left: 4px solid;
    background: var(--color-purple-light);
    border-color: var(--color-secondary);
}

.callout--info {
    background: var(--color-light-blue);
    border-color: var(--color-secondary);
}

.callout--warning {
    background: #fef3c7;
    border-color: #f59e0b;
}

.callout--success {
    background: #dcfce7;
    border-color: #22c55e;
}

.callout--danger {
    background: #fee2e2;
    border-color: #ef4444;
}

.callout__title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: inherit;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* Footnotes */
.footnotes {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.footnotes ol {
    padding-left: var(--spacing-lg);
}

.footnotes li {
    margin-bottom: var(--spacing-xs);
}

.footnote-ref a {
    vertical-align: super;
    font-size: 0.75em;
    margin-left: 2px;
}

/* Math Equations */
.math {
    overflow-x: auto;
    overflow-y: hidden;
    padding: var(--spacing-md);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.math--display {
    text-align: center;
}

/* Tooltip for abbreviations */
abbr[title] {
    position: relative;
}

abbr[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    white-space: nowrap;
    z-index: 1000;
    pointer-events: none;
}

/* Loading States */
.card--loading {
    position: relative;
    overflow: hidden;
    background: linear-gradient(90deg, 
        var(--color-gray-100) 0%, 
        var(--color-gray-200) 50%,
        var(--color-gray-100) 100%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* ============================================
   RESPONSIVE - BEM
   ============================================ */

@media (max-width: 768px) {
    .page {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .section--hero {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-lg);
    }
    
    .heading--hero {
        font-size: var(--font-size-2xl);
    }
    
    .text--hero {
        font-size: var(--font-size-md);
    }
    
    .section--header {
        padding: var(--spacing-md) 0;
        margin-bottom: var(--spacing-lg);
    }
    
    .card--grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .card__title {
        font-size: var(--font-size-lg);
    }
    
    .content h1 {
        font-size: var(--font-size-2xl);
    }
    
    .content h2 {
        font-size: var(--font-size-xl);
    }
    
    .content h3 {
        font-size: var(--font-size-lg);
    }
    
    .content h4 {
        font-size: var(--font-size-md);
    }
    
    .content p {
        font-size: var(--font-size-sm);
    }
    
    .content pre {
        padding: var(--spacing-md);
        margin: var(--spacing-lg) 0;
    }
    
    .content pre::before {
        left: var(--spacing-md);
        top: -10px;
        font-size: 0.7rem;
        padding: 3px 8px;
    }
    
    .content__copy-btn {
        padding: 4px 10px;
        font-size: 0.7rem;
        top: 8px;
        right: 8px;
    }
    
    .content img.align-left,
    .content img.align-right {
        float: none;
        margin: var(--spacing-md) 0;
        max-width: 100%;
    }
    
    .content .table-wrapper {
        margin: var(--spacing-lg) 0;
    }
    
    .content table {
        font-size: var(--font-size-xs);
        min-width: 100%;
    }
    
    .content th,
    .content td {
        padding: var(--spacing-sm);
        white-space: normal;
        word-wrap: break-word;
    }
    
    .navigation {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .navigation__item {
        max-width: 100%;
        width: 100%;
        justify-content: center;
    }
    
    .navigation__item--prev,
    .navigation__item--next {
        text-align: center;
        justify-content: center;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .page {
        padding: var(--spacing-lg);
    }
    
    .card--grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .content table {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    .content table {
        font-size: 0.7rem;
    }
    
    .content th,
    .content td {
        padding: 8px 6px;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-xs: 0.75rem;
        --font-size-sm: 0.875rem;
        --font-size-md: 1rem;
        --font-size-lg: 1.125rem;
        --font-size-xl: 1.375rem;
        --font-size-2xl: 1.625rem;
        --font-size-3xl: 1.875rem;
        --font-size-4xl: 2.25rem;
    }
}

/* ============================================
   PRINT STYLES - BEM
   ============================================ */

@media print {
    .section--hero,
    .link--back,
    .navigation,
    .link--readmore,
    .card:hover,
    .content__copy-btn,
    .content pre::before {
        display: none !important;
    }
    
    .page {
        padding: 0;
        max-width: 100%;
    }
    
    .content {
        padding: 0;
    }
    
    .content pre {
        white-space: pre-wrap;
        word-wrap: break-word;
        border: 1px solid var(--color-gray-300);
        background: var(--color-gray-50) !important;
        box-shadow: none !important;
    }
    
    .content a {
        color: var(--color-gray-900);
        text-decoration: underline;
    }
    
    .content a::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: var(--color-gray-600);
    }
    
    .content a[href^="#"]::after,
    .content a[href^="/"]::after {
        content: "";
    }
    
    .card {
        break-inside: avoid;
        border: 1px solid var(--color-gray-300) !important;
        box-shadow: none !important;
    }
    
    .content img {
        max-width: 100% !important;
        break-inside: avoid;
    }
    
    .content table {
        break-inside: avoid;
        box-shadow: none !important;
        border: 1px solid var(--color-gray-300) !important;
    }
    
    .content .table-wrapper {
        box-shadow: none !important;
        overflow: visible !important;
    }
}

/* ============================================
   ACCESSIBILITY - BEM
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus Styles - Enhanced */
:focus-visible {
    outline: 3px solid var(--color-secondary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Selection - Fixed white background issue */
::selection {
    background: rgba(124, 58, 237, 0.2);
    color: var(--color-gray-900);
}

::-moz-selection {
    background: rgba(124, 58, 237, 0.2);
    color: var(--color-gray-900);
}

/* Scrollbar Styling - Enhanced */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-full);
    border: 3px solid var(--color-white);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-secondary) 100%);
}

/* Dark Mode Support (Optional - Keep white bg preference) */
@media (prefers-color-scheme: dark) {
    :root {
        /* Keep white background but adjust for dark mode preference */
        --color-white: #ffffff;
        --color-gray-900: #000000;
        --color-gray-800: #111827;
        --color-gray-700: #1f2937;
        --color-gray-600: #374151;
        --color-gray-500: #4b5563;
        --color-gray-400: #6b7280;
        --color-gray-300: #9ca3af;
        --color-gray-200: #e5e7eb;
        --color-gray-100: #f3f4f6;
        --color-gray-50: #f9fafb;
    }
    
    body {
        background: var(--color-white);
        color: var(--color-gray-700);
    }
    
    .card {
        background: var(--color-white);
        border-color: var(--color-gray-200);
    }
    
    .card:hover {
        border-color: var(--color-primary-light);
    }
    
    .content pre {
        background: var(--gradient-code-bg);
        border-color: var(--color-purple-light-2);
    }
}