/* CSS Variables for theming */
:root {
    /* Light theme colors - Soft and Eye-friendly */
    --bg-primary: #ffffff;
    --bg-secondary: #fafbfc;
    --bg-tertiary: #f3f4f6;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --accent-light: #eef2ff;
    --code-bg: #f9fafb;
    --code-border: #d1d5db;
    --shadow-light: rgba(0, 0, 0, 0.12);
    --shadow-medium: rgba(0, 0, 0, 0.18);
    --shadow-heavy: rgba(0, 0, 0, 0.28);
    --gradient-primary: #6366f1;
    --gradient-secondary: #8b5cf6;
    
    /* Animation variables */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 8px;
    --border-radius-sm: 6px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
}

/* Dark theme colors - Soft and Eye-friendly */
[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --border-color: #374151;
    --border-light: #4b5563;
    --accent-color: #a78bfa;
    --accent-hover: #8b5cf6;
    --accent-light: #2e1b47;
    --code-bg: #1f2937;
    --code-border: #4b5563;
    --shadow-light: rgba(0, 0, 0, 0.25);
    --shadow-medium: rgba(0, 0, 0, 0.35);
    --shadow-heavy: rgba(0, 0, 0, 0.45);
    --gradient-primary: #a78bfa;
    --gradient-secondary: #c084fc;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Container */
.container {
    display: flex;
    min-height: 100vh;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    height: 70px;
    transition: all var(--transition-normal);
    box-shadow: 0 6px 25px var(--shadow-medium);
}

[data-theme="dark"] .header {
    background: rgba(17, 24, 39, 0.92);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
}

.header-left {
    display: flex;
    align-items: center;
}

.header-right {
    display: flex;
    align-items: center;
}

/* Logo Container */
.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition-normal);
}

.logo-gif {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
    transition: var(--transition-normal);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.logo-gif:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.15));
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-color);
    transition: all var(--transition-normal);
    position: relative;
}

.logo-text::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width var(--transition-normal);
}

.logo-text:hover::after {
    width: 100%;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    position: relative;
    overflow: hidden;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-color);
    transition: left var(--transition-normal);
    z-index: 0;
}

.theme-toggle:hover::before {
    left: 0;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: transparent;
}

.theme-toggle svg {
    position: relative;
    z-index: 1;
    transition: all var(--transition-fast);
}

.theme-toggle:hover svg {
    transform: rotate(15deg) scale(1.1);
    color: white;
}

.theme-toggle svg {
    transition: transform var(--transition-fast);
}

.theme-toggle:hover svg {
    transform: rotate(15deg);
}

.sun-icon {
    display: block;
}

.moon-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: block;
}

/* Language Selector */
.language-selector {
    position: relative;
}

.language-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 10px 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

.language-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-color);
    transition: left var(--transition-normal);
    z-index: 0;
}

.language-toggle:hover::before {
    left: 0;
}

.language-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: transparent;
}

.language-toggle span,
.language-toggle svg {
    position: relative;
    z-index: 1;
    transition: all var(--transition-fast);
}

.language-toggle:hover span,
.language-toggle:hover svg {
    color: white;
}

.language-toggle svg {
    transition: transform var(--transition-fast);
}

.language-selector.active .language-toggle svg {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-medium);
    padding: 8px 0;
    margin-top: 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1001;
    min-width: 120px;
}

.language-selector.active .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    width: 100%;
    padding: 8px 16px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background-color var(--transition-fast);
    font-size: 0.9rem;
}

.lang-option:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 70px;
    left: 0;
    width: 300px;
    height: calc(100vh - 70px);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    z-index: 999;
    transition: all var(--transition-normal);
    box-shadow: 6px 0 25px var(--shadow-medium);
}

[data-theme="dark"] .sidebar {
    background: rgba(17, 24, 39, 0.92);
}

.sidebar-content {
    padding: 20px;
}

.sidebar-section {
    margin-bottom: 30px;
}

.sidebar-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 15px;
    transition: color var(--transition-normal);
}

.sidebar-menu {
    list-style: none;
}

.sidebar-link {
    display: block;
    padding: 12px 20px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    margin-bottom: 4px;
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

.sidebar-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 0;
    background: var(--accent-color);
    transition: width var(--transition-normal);
    z-index: -1;
}

.sidebar-link::after {
    content: '';
    position: absolute;
    right: 0;
    top: 100%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid var(--accent-color);
    opacity: 0;
    transition: all var(--transition-fast);
    z-index: 1;
    pointer-events: none;
}

.sidebar-link:hover {
    background: var(--accent-light);
    color: var(--accent-color);
    transform: translateX(6px);
    border-color: var(--accent-color);
    box-shadow: 0 4px 15px var(--shadow-medium);
}

.sidebar-link:hover::before {
    width: 4px;
}

.sidebar-link:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(-4px);
}

.sidebar-link.active {
    background: var(--accent-color);
    color: white;
    font-weight: 600;
    transform: translateX(6px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: transparent;
}

.sidebar-link.active::before {
    width: 4px;
    background: white;
}

.sidebar-link.active::after {
    opacity: 1;
    transform: translateY(-50%) translateX(-4px);
    border-top-color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 300px;
    margin-top: 70px;
    background: var(--bg-secondary);
    min-height: calc(100vh - 70px);
    transition: background-color var(--transition-normal);
}

.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    display: flex;
    gap: 40px;
    position: relative;
}

.content-section {
    flex: 1;
    max-width: 800px;
}

/* Content Sections */
.content-section {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.content-section.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    transition: border-color var(--transition-normal);
}

.section-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    transition: color var(--transition-normal);
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    font-weight: 400;
    transition: color var(--transition-normal);
}

/* Content Blocks */
.content-block {
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-block h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    margin-top: 30px;
    transition: color var(--transition-normal);
}

.content-block h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
    margin-top: 25px;
    transition: color var(--transition-normal);
}

.content-block h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    margin-top: 20px;
    transition: color var(--transition-normal);
}

.content-block p {
    margin-bottom: 15px;
    color: var(--text-secondary);
    transition: color var(--transition-normal);
}

.content-block ul {
    margin-bottom: 20px;
    padding-left: 20px;
}

.content-block li {
    margin-bottom: 8px;
    color: var(--text-secondary);
    transition: color var(--transition-normal);
}

/* Command Blocks */
.command-block {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 30px;
    transition: all var(--transition-normal);
    box-shadow: 0 6px 24px var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.command-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent-color);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.command-block:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px var(--shadow-heavy);
    border-color: var(--accent-color);
}

.command-block:hover::before {
    transform: scaleX(1);
}

.command-block h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

.command-block p {
    margin-bottom: 15px;
}

.command-details {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-sm);
    padding: 15px;
    margin-top: 15px;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.command-details h4 {
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--text-secondary);
    transition: color var(--transition-normal);
}

.command-details ul {
    margin-bottom: 15px;
}

.command-details li {
    margin-bottom: 5px;
}

/* Code blocks */
code {
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--accent-color);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

pre {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: var(--border-radius-sm);
    padding: 16px;
    overflow-x: auto;
    margin: 15px 0;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    box-shadow: 0 4px 12px var(--shadow-medium);
    position: relative;
}

pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
    font-size: 0.9em;
    line-height: 1.45;
    transition: color var(--transition-normal);
}

/* Rules Grid */
.rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.rule-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 15px;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.rule-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-heavy);
}

.rule-item h4 {
    margin-top: 0;
    margin-bottom: 8px;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.rule-item p {
    margin-bottom: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color var(--transition-normal);
}

/* Strong and emphasis */
strong {
    font-weight: 600;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

em {
    font-style: italic;
    color: var(--text-muted);
    transition: color var(--transition-normal);
}

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

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background-color: var(--accent-color);
    transition: width var(--transition-fast);
}

a:hover::after {
    width: 100%;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        width: 280px;
    }
    
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 30px var(--shadow-heavy);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .header-content {
        padding: 0 15px;
    }
    
    .content-wrapper {
        padding: 30px 15px;
        flex-direction: column;
        gap: 20px;
    }
    
    .content-section {
        max-width: none;
    }
    
    .table-of-contents-sidebar {
        position: static;
        width: 100%;
        order: -1;
    }
    
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}

@media (max-width: 768px) {
    .nav-list {
        gap: 20px;
    }
    
    .section-header h1 {
        font-size: 2rem;
    }
    
    .content-block h2 {
        font-size: 1.5rem;
    }
    
    .content-block h3 {
        font-size: 1.1rem;
    }
    
    .rules-grid {
        grid-template-columns: 1fr;
    }
    
    .command-block {
        padding: 15px;
    }
    
    .command-details {
        padding: 12px;
    }

    .logo-container {
        gap: 8px;
    }

    .logo-gif {
        width: 32px;
        height: 32px;
    }

    .logo-text {
        font-size: 1.4rem;
    }
    
    .table-of-contents-sidebar {
        padding: 16px;
    }
    
    .table-of-contents-sidebar h3 {
        font-size: 0.9rem;
    }
    
    .toc-link {
        font-size: 0.85rem;
        padding: 4px 0;
    }
}

@media (max-width: 480px) {
    .header-content {
        flex-direction: column;
        height: auto;
        padding: 10px 15px;
    }
    
    .logo-container {
        margin-bottom: 10px;
        gap: 6px;
    }

    .logo-gif {
        width: 28px;
        height: 28px;
    }

    .logo-text {
        font-size: 1.2rem;
    }
    
    .nav-list {
        gap: 15px;
    }
    
    .content-wrapper {
        padding: 20px 10px;
    }
    
    .section-header {
        margin-bottom: 30px;
    }
    
    .section-header h1 {
        font-size: 1.75rem;
    }
}

/* Scrollbar styling */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.sidebar-link:focus,
.theme-toggle:focus,
.language-toggle:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Table of Contents Sidebar */
.table-of-contents-sidebar {
    position: sticky;
    top: 90px;
    width: 280px;
    height: fit-content;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.table-of-contents-sidebar h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 12px;
    padding-bottom: 0;
    border-bottom: none;
    transition: color var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table-of-contents-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
}

.table-of-contents-sidebar ul::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border-color);
}

.table-of-contents-sidebar li {
    margin-bottom: 4px;
    position: relative;
}

.toc-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    padding: 4px 0;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    border-radius: 0;
    padding-left: 12px;
    margin-left: 0;
    position: relative;
    line-height: 1.4;
}

.toc-link:hover {
    color: var(--text-primary);
    background: transparent;
    transform: none;
}

/* Syntax highlighting classes */
.syntax-command {
    color: #6366f1;
    font-weight: 600;
}

.syntax-parameter {
    color: #8b5cf6;
    font-weight: 500;
}

.syntax-example {
    color: #10b981;
    font-weight: 500;
}

/* Additional animations and improvements */
.search-input {
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

/* Improved scrollbar */
.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
    transition: background-color var(--transition-fast);
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Loading animation for content */
.content-section {
    animation: fadeIn 0.5s ease-out;
}

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

/* Hover effects for interactive elements */
.command-block,
.rule-item {
    cursor: pointer;
}

/* Improved mobile menu toggle */
.mobile-menu-toggle {
    transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover {
    transform: scale(1.1);
}

/* Enhanced copy button */
.copy-button {
    transition: all var(--transition-fast);
}

.copy-button:hover {
    transform: scale(1.05);
    background: var(--accent-hover) !important;
}

/* Scroll to top button */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: 0 8px 25px var(--shadow-medium);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.scroll-to-top:hover {
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 12px 40px var(--shadow-heavy);
}

.scroll-to-top.visible {
    opacity: 1;
}

/* Print styles */
@media print {
    .header,
    .sidebar,
    .scroll-to-top {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
        margin-top: 0;
    }
    
    .content-wrapper {
        max-width: none;
        padding: 0;
    }
}