/* Variables */
:root {
    /* Core colors */
    --primary: #673CA0;
    --secondary: #415BB3;
    --dark: #272727;
    --accent-blue: #00B0D3;
    --accent-purple: #802492;
    --accent-violet: #5C44A4;
    --white: #FFFFFF;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    
    /* Typography */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Ubuntu, 'Helvetica Neue', sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
    
    /* Layout */
    --header-height: 60px;
    --nav-width: 300px;
    --content-max-width: 800px;
    --sidebar-width: 300px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    
    /* Z-Index */
    --z-overlay: 100;
    --z-drawer: 200;
    --z-modal: 300;
    --z-sticky: 400;
}

/* Import Base Styles */
@import url('base/reset.css');
@import url('base/variables.css');

/* Import Component Styles */
@import url('components/icon-box.css');
@import url('components/toc.css');

/* Import Layout Styles */
@import url('layout/sections.css');

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Fira+Code:wght@400;500&display=swap');

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: var(--spacing-8);
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--dark);
    background: linear-gradient(135deg, 
        var(--primary) 0%,
        var(--secondary) 25%,
        var(--accent-blue) 50%,
        var(--accent-purple) 75%,
        var(--accent-violet) 100%
    );
    background-attachment: fixed;
    min-height: 100vh;
    padding: var(--spacing-4);
}

/* Skip link */
.skip-link {
    position: fixed;
    top: -100%;
    left: var(--spacing-4);
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--white);
    color: var(--primary);
    z-index: var(--z-overlay);
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transition: all var(--transition-fast);
}

.skip-link:focus {
    top: var(--spacing-4);
    opacity: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-6);
    color: var(--primary);
    scroll-margin-top: var(--spacing-8);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-6);
}

/* Links */
a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--secondary);
}

a:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 2px;
}

/* External link icon */
.external-link-icon {
    display: inline-block;
    margin-left: var(--spacing-1);
    font-size: 0.875em;
}

/* Main Layout */
.page-wrapper {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(
        135deg,
        rgba(103, 60, 160, 0.95),
        rgba(65, 91, 179, 0.95)
    );
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-right: 1px solid var(--glass-border);
    z-index: var(--z-drawer);
    transition: transform var(--transition-normal);
}

.sidebar-inner {
    height: 100%;
    overflow-y: auto;
    padding: var(--spacing-4);
}

/* Main Content */
.main-content {
    grid-column: 2;
    min-width: 0;
    padding: var(--spacing-4);
    background: transparent;
}

.content-wrapper {
    max-width: var(--content-max-width);
    margin: 0 auto;
    width: 100%;
}

/* Hero Section */
.section-hero {
    padding: var(--spacing-16) 0 var(--spacing-8);
    text-align: center;
    background: linear-gradient(
        135deg,
        rgba(103, 60, 160, 0.05),
        rgba(65, 91, 179, 0.05)
    );
    border-radius: 16px;
    margin-bottom: var(--spacing-8);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Layout */
@media (max-width: 992px) {
    .page-wrapper {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        grid-column: 1;
        padding: var(--spacing-4) var(--spacing-4);
    }
    
    .section-hero {
        padding: var(--spacing-8) 0 var(--spacing-6);
    }
}

/* Mobile Navigation */
.mobile-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-4);
    left: var(--spacing-4);
    z-index: var(--z-sticky);
    padding: var(--spacing-2);
    background: var(--primary);
    border: none;
    border-radius: 8px;
    color: var(--white);
    cursor: pointer;
    transition: all var(--transition-fast);
}

@media (max-width: 992px) {
    .mobile-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .sidebar-active .main-content {
        filter: blur(3px);
        pointer-events: none;
    }
}

/* Utility Classes */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Loading States */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--light);
    font-size: var(--text-lg);
    text-align: center;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 1em;
    height: 1em;
    margin-left: 0.5em;
    border: 2px solid var(--light);
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Print Styles */
@media print {
    .sidebar,
    .mobile-toggle {
        display: none;
    }
    
    .page-wrapper {
        display: block;
    }
    
    .main-content {
        padding: 0;
    }
    
    .section-hero {
        padding: 2cm 0 1cm;
    }
}

/* Navigation */
.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
}

.nav-list ul {
    list-style: none;
    padding-left: var(--spacing-4);
    margin: var(--spacing-1) 0;
    border-left: 1px solid var(--glass-border);
}

.nav-item {
    margin: var(--spacing-1) 0;
    width: 100%;
}

.nav-link {
    display: block;
    padding: var(--spacing-2) var(--spacing-4);
    color: var(--white);
    text-decoration: none;
    font-size: 0.9rem;
    line-height: 1.4;
    border-radius: 4px;
    transition: all var(--transition-fast);
    opacity: 0.8;
    width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-link:hover {
    opacity: 1;
    background: var(--glass-bg);
}

.nav-link[data-level="1"] {
    font-size: 1rem;
    font-weight: 600;
    opacity: 1;
}

.nav-link[data-level="2"] {
    font-size: 0.95rem;
    font-weight: 500;
}

/* Content Styles */
#content-root {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

/* Typography */
#content-root h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    margin: var(--spacing-8) 0 var(--spacing-6);
    color: var(--primary);
}

#content-root h2 {
    font-size: 2rem;
    line-height: 1.3;
    margin: var(--spacing-8) 0 var(--spacing-4);
    color: var(--secondary);
}

#content-root h3 {
    font-size: 1.75rem;
    line-height: 1.4;
    margin: var(--spacing-6) 0 var(--spacing-4);
    color: var(--accent-violet);
}

#content-root h4 {
    font-size: 1.5rem;
    line-height: 1.4;
    margin: var(--spacing-6) 0 var(--spacing-4);
    color: var(--accent-blue);
}

#content-root h5 {
    font-size: 1.25rem;
    line-height: 1.4;
    margin: var(--spacing-4) 0 var(--spacing-2);
    color: var(--accent-purple);
}

#content-root h6 {
    font-size: 1.1rem;
    line-height: 1.4;
    margin: var(--spacing-4) 0 var(--spacing-2);
    color: var(--dark);
    font-weight: 600;
}

#content-root p {
    margin: var(--spacing-4) 0;
    font-size: 1rem;
    line-height: 1.7;
    max-width: 65ch;
}

/* Lists */
#content-root ul,
#content-root ol {
    margin: var(--spacing-4) 0;
    padding-left: var(--spacing-8);
    max-width: 65ch;
}

#content-root li {
    margin: var(--spacing-2) 0;
    line-height: 1.6;
}

/* Blockquotes */
#content-root blockquote {
    margin: var(--spacing-6) 0;
    padding: var(--spacing-4) var(--spacing-6);
    border-left: 4px solid var(--primary);
    background: linear-gradient(135deg,
        rgba(103, 60, 160, 0.1),
        rgba(65, 91, 179, 0.1)
    );
    border-radius: 8px;
    max-width: 65ch;
}

#content-root blockquote p {
    margin: 0;
    font-style: italic;
    color: var(--dark);
}

/* Images */
#content-root img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: var(--spacing-4) 0;
}

/* Horizontal Rule */
#content-root hr {
    margin: var(--spacing-8) 0;
    border: none;
    height: 1px;
    background: linear-gradient(to right,
        rgba(103, 60, 160, 0.2),
        rgba(65, 91, 179, 0.2)
    );
}

/* Description Lists */
#content-root dl {
    margin: var(--spacing-4) 0;
    max-width: 65ch;
}

#content-root dt {
    font-weight: 600;
    color: var(--primary);
    margin-top: var(--spacing-4);
}

#content-root dd {
    margin-left: var(--spacing-4);
    margin-top: var(--spacing-2);
}

/* Inline Code */
#content-root code:not([class*="language-"]) {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: rgba(103, 60, 160, 0.1);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    color: var(--primary);
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    #content-root h1 { font-size: 2rem; }
    #content-root h2 { font-size: 1.75rem; }
    #content-root h3 { font-size: 1.5rem; }
    #content-root h4 { font-size: 1.25rem; }
    #content-root h5 { font-size: 1.1rem; }
    #content-root h6 { font-size: 1rem; }
    
    #content-root p,
    #content-root ul,
    #content-root ol,
    #content-root blockquote {
        max-width: 100%;
    }
    
    .table-container {
        margin: var(--spacing-4) -var(--spacing-4);
        width: calc(100% + var(--spacing-4) * 2);
        border-radius: 0;
    }
}

/* Global Styles */
body {
    background: linear-gradient(135deg, var(--dark), var(--primary));
    color: var(--dark);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, var(--accent-2) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, var(--accent-3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, var(--accent) 0%, transparent 30%);
    opacity: 0.15;
    pointer-events: none;
    z-index: -1;
}

.page-wrapper {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    position: sticky;
    top: 2rem;
    height: calc(100vh - 4rem);
}

.sidebar-inner {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 1.5rem;
    height: 100%;
    overflow-y: auto;
    box-shadow: var(--glass-shadow);
}

.toc-header {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.toc-content {
    color: var(--white);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-sublist {
    list-style: none;
    padding-left: 1.5rem;
    margin: 0.5rem 0;
}

.toc-item {
    margin: 0.5rem 0;
}

.toc-link {
    color: var(--white);
    text-decoration: none;
    display: block;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.toc-link:hover,
.toc-link.active {
    background: rgba(255, 255, 255, 0.1);
}

/* Main Content Styles */
.main-content {
    background: var(--white);
    border-radius: 1rem;
    box-shadow: var(--glass-shadow);
    min-height: calc(100vh - 4rem);
}

.content-wrapper {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Section Styles */
.section {
    margin: 4rem 0;
    padding: 2rem;
    background: var(--white);
    border-radius: 1rem;
    box-shadow: var(--glass-shadow);
}

.section-inner {
    max-width: 1000px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 2rem;
    text-align: center;
}

.section-title {
    color: var(--primary);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Icon Box Styles */
.icon-box-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.icon-box {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.icon-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--glass-shadow);
}

.icon-box-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.icon-box-content {
    color: var(--dark);
}

.icon-box-content strong {
    color: var(--primary);
    display: block;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--primary);
    line-height: 1.3;
    margin: 2rem 0 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.75rem; }
h5 { font-size: 1.5rem; }
h6 { font-size: 1.25rem; }

p {
    margin: 1rem 0;
    line-height: 1.8;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-2);
}

/* Code Block Styles */
.code-block-container {
    margin: 2rem 0;
    background: var(--dark);
    border-radius: 0.5rem;
    overflow: hidden;
}

.code-header {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.75rem 1rem;
    color: var(--white);
    font-size: 0.9rem;
}

pre {
    margin: 0;
    padding: 1.5rem;
    overflow-x: auto;
}

code {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
}

/* Lists */
ul, ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

li {
    margin: 0.5rem 0;
}

/* Tables */
.table-container {
    margin: 2rem 0;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: 0.5rem;
    overflow: hidden;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

th {
    background: var(--primary);
    color: var(--white);
}

tr:hover {
    background: rgba(0, 0, 0, 0.02);
}

/* Responsive Design */
@media (max-width: 992px) {
    .page-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 300px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1000;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .content-wrapper {
        padding: 1rem;
    }

    .section {
        padding: 1.5rem;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    h4 { font-size: 1.5rem; }
    h5 { font-size: 1.25rem; }
    h6 { font-size: 1.1rem; }
}

/* Loading State */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--primary);
    font-size: 1.2rem;
}

.loading::after {
    content: '';
    width: 1.2rem;
    height: 1.2rem;
    margin-left: 0.5rem;
    border: 2px solid var(--primary);
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Error Message */
.error-message {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    margin: var(--spacing-4) 0;
    text-align: center;
    backdrop-filter: blur(10px);
}

.error-message h2 {
    color: var(--error);
    margin-bottom: var(--spacing-4);
}

.error-message p {
    color: var(--text);
    margin-bottom: var(--spacing-2);
}

/* Animations */
.icon-box-animate {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    gap: var(--spacing-8);
    padding: var(--spacing-8) 0;
}

/* Content Area */
.content-area {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--primary);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--spacing-4);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition-colors);
}

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

/* Code Blocks */
pre, code {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background: var(--dark);
    color: var(--white);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-lg);
}

pre {
    padding: var(--spacing-4);
    overflow-x: auto;
}

pre code {
    padding: 0;
    background: none;
}

/* Lists */
ul, ol {
    margin-bottom: var(--spacing-4);
    padding-left: var(--spacing-6);
}

ul {
    list-style-type: disc;
}

ol {
    list-style-type: decimal;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-4);
}

th, td {
    padding: var(--spacing-3);
    border: 1px solid var(--glass-border);
}

th {
    background: var(--glass-bg);
    font-weight: 600;
}

/* Blockquotes */
blockquote {
    border-left: 4px solid var(--primary);
    padding: var(--spacing-4);
    margin: var(--spacing-4) 0;
    background: var(--glass-bg);
    border-radius: var(--radius-lg);
}

/* Responsive Design */
@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .content-area {
        padding: var(--spacing-4);
    }
    
    h1 { font-size: var(--text-4xl); }
    h2 { font-size: var(--text-3xl); }
    h3 { font-size: var(--text-2xl); }
    h4 { font-size: var(--text-xl); }
    h5 { font-size: var(--text-lg); }
    h6 { font-size: var(--text-base); }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    pre {
        padding: var(--spacing-3);
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from { transform: translateX(20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

.slide-in {
    animation: slideInRight 0.5s ease-out forwards;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    z-index: var(--z-50);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3);
    color: var(--white);
    font-size: var(--text-xl);
    cursor: pointer;
    transition: var(--transition-all);
    backdrop-filter: blur(10px);
}

.menu-toggle:hover {
    background: var(--primary);
    border-color: var(--primary);
}

@media (max-width: 992px) {
    .menu-toggle {
        display: block;
    }
    
    .toc-container {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: var(--z-40);
        overflow-y: auto;
    }
    
    .toc-container.active {
        transform: translateX(0);
    }
    
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Layout Styles */
:root {
    /* Colors */
    --primary: #6d28d9;
    --primary-dark: #5b21b6;
    --secondary: #10b981;
    --dark: #1f2937;
    --darker: #111827;
    --light: #f3f4f6;
    --white: #ffffff;
    --error: #ef4444;
    
    /* Glass Effects */
    --glass-bg: rgba(31, 41, 55, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 1rem;
    
    /* Z-index */
    --z-0: 0;
    --z-10: 10;
    --z-20: 20;
    --z-30: 30;
    --z-40: 40;
    --z-50: 50;
    
    /* Typography */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    
    /* Transitions */
    --transition-all: all 0.3s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--light);
    background: var(--darker);
    min-height: 100vh;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-4);
}

/* Main Content Layout */
.main-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-8);
    margin-top: var(--spacing-8);
}

/* Table of Contents */
.toc-container {
    position: sticky;
    top: var(--spacing-8);
    height: calc(100vh - var(--spacing-8) * 2);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    backdrop-filter: blur(10px);
    overflow-y: auto;
}

.toc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-6);
}

.toc-header h2 {
    font-size: var(--text-2xl);
    color: var(--white);
    margin: 0;
}

.toc-close {
    display: none;
    background: transparent;
    border: none;
    color: var(--white);
    font-size: var(--text-xl);
    cursor: pointer;
}

.toc-list {
    list-style: none;
}

.toc-sublist {
    list-style: none;
    margin-left: var(--spacing-4);
}

.toc-item {
    margin: var(--spacing-2) 0;
}

.toc-link {
    color: var(--light);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: var(--transition-all);
    display: block;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
}

.toc-link:hover,
.toc-link.active {
    color: var(--white);
    background: var(--primary);
}

/* Content Area */
.content-area {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-8);
    backdrop-filter: blur(10px);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--white);
    margin: var(--spacing-6) 0 var(--spacing-4);
    line-height: 1.3;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-base); }
h6 { font-size: var(--text-sm); }

p {
    margin-bottom: var(--spacing-4);
}

a {
    color: var(--secondary);
    text-decoration: none;
    transition: var(--transition-all);
}

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

/* Code Blocks */
pre {
    background: var(--darker);
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
    margin: var(--spacing-4) 0;
    overflow-x: auto;
}

code {
    font-family: 'Fira Code', monospace;
    font-size: var(--text-sm);
}

/* Icon Boxes */
.icon-box {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    margin: var(--spacing-4) 0;
    backdrop-filter: blur(10px);
}

.icon-box-title {
    font-size: var(--text-xl);
    color: var(--white);
    margin-bottom: var(--spacing-4);
    font-weight: bold;
}

.icon-box-content {
    color: var(--light);
}

/* Blockquotes */
blockquote {
    border-left: 4px solid var(--primary);
    padding: var(--spacing-4);
    margin: var(--spacing-4) 0;
    background: var(--glass-bg);
    border-radius: var(--radius-md);
}

/* Lists */
ul, ol {
    margin: var(--spacing-4) 0;
    padding-left: var(--spacing-8);
}

li {
    margin: var(--spacing-2) 0;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

figure {
    margin: var(--spacing-6) 0;
}

figcaption {
    text-align: center;
    color: var(--light);
    font-size: var(--text-sm);
    margin-top: var(--spacing-2);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    z-index: var(--z-50);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3);
    color: var(--white);
    font-size: var(--text-xl);
    cursor: pointer;
    transition: var(--transition-all);
    backdrop-filter: blur(10px);
}

.menu-toggle:hover {
    background: var(--primary);
    border-color: var(--primary);
}

/* Error Message */
.error-message {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    margin: var(--spacing-4) 0;
    text-align: center;
    backdrop-filter: blur(10px);
}

.error-message h2 {
    color: var(--error);
    margin-bottom: var(--spacing-4);
}

.error-message p {
    color: var(--text);
    margin-bottom: var(--spacing-2);
}

/* Responsive Design */
@media (max-width: 992px) {
    .menu-toggle {
        display: block;
    }
    
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .toc-container {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: var(--z-40);
    }
    
    .toc-container.active {
        transform: translateX(0);
    }
    
    .toc-close {
        display: block;
    }
    
    .content-area {
        padding: var(--spacing-4);
    }
}

@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    .container {
        padding: var(--spacing-2);
    }
    
    .main-content {
        margin-top: var(--spacing-4);
    }
    
    h1 { font-size: var(--text-2xl); }
    h2 { font-size: var(--text-xl); }
    h3 { font-size: var(--text-lg); }
    h4 { font-size: var(--text-base); }
    h5 { font-size: var(--text-sm); }
    h6 { font-size: var(--text-xs); }
}

/* Base Styles */
:root {
    /* Colors */
    --primary: #673CA0;
    --secondary: #415BB3;
    --accent-1: #00B0D3;
    --accent-2: #802492;
    --accent-3: #5C44A4;
    --dark: #1a1a2e;
    --darker: #0f0f1a;
    --white: #ffffff;
    --gray-100: #f7f7f7;
    --gray-200: #e9e9e9;
    --gray-300: #d9d9d9;
    --gray-800: #333333;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Poppins', sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    /* Layout */
    --max-width: 1400px;
    --toc-width: 300px;
    --content-width: 800px;
}

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

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

body {
    font-family: var(--font-primary);
    background: var(--darker);
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

/* Layout */
.container {
    display: grid;
    grid-template-columns: var(--toc-width) 1fr;
    gap: 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
}

/* Content */
.content-wrapper {
    background: var(--white);
    border-radius: 15px;
    padding: 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    min-height: calc(100vh - 4rem);
}

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

/* Typography */
.content h1:first-child {
    font-size: 2.5rem;
    color: var(--primary);
    border-bottom: 2px solid var(--accent-1);
    padding-bottom: 1rem;
    margin: 0 0 2rem 0;
}

.content h1 {
    font-size: 2.25rem;
    color: var(--primary);
    margin: 3rem 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.content h1::before {
    content: '★';
    color: var(--accent-1);
    font-size: 1.5rem;
}

.content h2 {
    font-size: 1.75rem;
    color: var(--secondary);
    margin: 2.5rem 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.content h2::before {
    content: '■';
    color: var(--accent-2);
    font-size: 1rem;
}

.content h3 {
    font-size: 1.5rem;
    color: var(--accent-2);
    margin: 2rem 0 1rem;
}

.content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: var(--gray-800);
}

.content strong {
    color: var(--primary);
    font-weight: 600;
}

/* Table of Contents */
.toc-container {
    position: sticky;
    top: 2rem;
    height: calc(100vh - 4rem);
    overflow-y: auto;
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 1.5rem;
    color: var(--white);
}

.toc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.toc-header h2 {
    font-size: 1.25rem;
    color: var(--white);
    margin: 0;
    font-weight: 600;
}

.toc-list {
    list-style: none;
    padding: 0;
}

.toc-list ul {
    list-style: none;
    padding-left: 1rem;
    margin: 0.5rem 0;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.toc-list li {
    margin-bottom: 0.5rem;
}

.toc-list a {
    display: block;
    padding: 0.5rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    border-radius: 6px;
}

.toc-list a:hover,
.toc-list a.active {
    color: var(--accent-1);
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(5px);
}

.toc-list > li > a {
    font-weight: 500;
    color: var(--white);
}

.toc-list > li > ul > li > a {
    font-size: 0.85rem;
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    font-size: 1.5rem;
    z-index: 100;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(103, 60, 160, 0.3);
}

/* Lists */
.content ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
    list-style-type: none;
}

.content ul li {
    margin-bottom: 0.75rem;
    position: relative;
}

.content ul li::before {
    content: '•';
    color: var(--accent-1);
    position: absolute;
    left: -1.5rem;
    font-weight: bold;
}

/* Code */
code {
    font-family: var(--font-mono);
    background: var(--gray-100);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--accent-2);
}

pre {
    background: var(--gray-100);
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0;
}

pre code {
    background: none;
    padding: 0;
    font-size: 0.9rem;
    color: var(--gray-800);
}

/* Responsive */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 250px 1fr;
        padding: 1rem;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .toc-container {
        position: fixed;
        left: -100%;
        top: 0;
        width: 100%;
        max-width: 300px;
        height: 100vh;
        z-index: 1000;
        transition: left 0.3s ease;
    }
    
    .toc-container.active {
        left: 0;
    }
    
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .content-wrapper {
        padding: 1.5rem;
    }
    
    .content h1:first-child { font-size: 2rem; }
    .content h1 { font-size: 1.75rem; }
    .content h2 { font-size: 1.5rem; }
    .content h3 { font-size: 1.25rem; }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-2);
}

/* Loading State */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    color: var(--gray-400);
    font-size: 1.1rem;
}