/* ============================================
   ISON - Award-Winning Design System
   Enterprise-Grade • Billion User Scale
   ============================================ */

/* CSS Custom Properties - Design Tokens */
:root {
    /* Primary Brand Colors */
    --primary-50: #E6F7FA;
    --primary-100: #CCF0F5;
    --primary-200: #99E0EB;
    --primary-300: #66D1E1;
    --primary-400: #33C1D7;
    --primary-500: #0EA5C9;
    --primary-600: #0B84A1;
    --primary-700: #086379;
    --primary-800: #064251;
    --primary-900: #032128;

    /* Accent Colors */
    --accent-cyan: #22D3EE;
    --accent-teal: #14B8A6;
    --accent-emerald: #10B981;
    --accent-violet: #8B5CF6;
    --accent-amber: #F59E0B;
    --accent-rose: #F43F5E;

    /* Gradient Definitions */
    --gradient-primary: linear-gradient(135deg, #0F172A 0%, #1E3A5F 50%, #0EA5C9 100%);
    --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 25%, #0C4A6E 50%, #0284C7 75%, #22D3EE 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 100%);
    --gradient-glow: radial-gradient(circle at 50% 50%, rgba(14, 165, 201, 0.3) 0%, transparent 70%);
    --gradient-mesh: linear-gradient(45deg, rgba(14, 165, 201, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);

    /* Semantic Colors */
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --error: #EF4444;
    --error-light: #FEE2E2;
    --info: #3B82F6;
    --info-light: #DBEAFE;

    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    --gray-950: #020617;

    /* Background & Surface */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --bg-elevated: #FFFFFF;
    --bg-dark: #0F172A;
    --bg-code: #0D1117;

    /* Text Colors */
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #64748B;
    --text-muted: #94A3B8;
    --text-inverse: #FFFFFF;

    /* Border Colors */
    --border-light: #E2E8F0;
    --border-medium: #CBD5E1;
    --border-dark: #94A3B8;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Font Sizes - Fluid Typography */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
    --text-sm: clamp(0.8125rem, 0.775rem + 0.1875vw, 0.875rem);
    --text-base: clamp(0.9375rem, 0.9rem + 0.1875vw, 1rem);
    --text-lg: clamp(1.0625rem, 1rem + 0.3125vw, 1.125rem);
    --text-xl: clamp(1.1875rem, 1.1rem + 0.4375vw, 1.25rem);
    --text-2xl: clamp(1.4375rem, 1.3rem + 0.6875vw, 1.5rem);
    --text-3xl: clamp(1.75rem, 1.55rem + 1vw, 1.875rem);
    --text-4xl: clamp(2.125rem, 1.85rem + 1.375vw, 2.25rem);
    --text-5xl: clamp(2.75rem, 2.35rem + 2vw, 3rem);
    --text-6xl: clamp(3.25rem, 2.75rem + 2.5vw, 3.75rem);
    --text-7xl: clamp(4rem, 3.25rem + 3.75vw, 4.5rem);

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 40px rgba(14, 165, 201, 0.3);
    --shadow-glow-lg: 0 0 80px rgba(14, 165, 201, 0.4);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-Index Scale */
    --z-base: 0;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;
    --z-max: 9999;

    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

/* ============================================
   Dark Theme Variables
   ============================================ */
[data-theme="dark"] {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --bg-elevated: #1E293B;

    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-tertiary: #94A3B8;
    --text-muted: #64748B;

    --border-light: #334155;
    --border-medium: #475569;
    --border-dark: #64748B;

    --primary-500: #22D3EE;
    --primary-600: #06B6D4;

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.6);
}

/* ============================================
   CSS Reset & Base Styles
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

button {
    font: inherit;
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
}

code, pre, kbd {
    font-family: var(--font-mono);
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-narrow {
    max-width: var(--container-lg);
}

.container-wide {
    max-width: var(--container-2xl);
}

/* ============================================
   Navigation - Premium Glassmorphism
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    padding: var(--space-4) 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.98);
    border-bottom-color: rgba(51, 65, 85, 0.8);
}

.navbar.scrolled {
    padding: var(--space-3) 0;
    box-shadow: var(--shadow-lg);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-2xl);
}

.nav-brand .logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
}

.nav-brand .logo img {
    width: auto;
    height: 50px;
    transition: transform var(--transition-base);
}

.nav-brand .logo:hover img {
    transform: scale(1.05) rotate(-5deg);
}

.logo-text {
    font-size: var(--text-2xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-links a {
    position: relative;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-500);
    transform: translateX(-50%);
    transition: width var(--transition-fast);
    border-radius: var(--radius-full);
}

.nav-links a:hover {
    color: var(--primary-600);
    background: var(--primary-50);
}

[data-theme="dark"] .nav-links a:hover {
    background: rgba(14, 165, 201, 0.1);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: calc(100% - var(--space-8));
}

.nav-links a.active {
    color: var(--primary-600);
    font-weight: 600;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* ============================================
   Buttons - Premium Design
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(14, 165, 201, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(14, 165, 201, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-600);
    border: 2px solid var(--primary-500);
}

.btn-secondary:hover {
    background: var(--primary-50);
    border-color: var(--primary-600);
    transform: translateY(-2px);
}

[data-theme="dark"] .btn-secondary {
    color: var(--primary-400);
    border-color: var(--primary-400);
}

[data-theme="dark"] .btn-secondary:hover {
    background: rgba(14, 165, 201, 0.1);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: var(--space-2) var(--space-4);
}

.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-ghost:hover {
    background: var(--gray-800);
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    border-radius: var(--radius-xl);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-lg);
}

/* Hero Section Button Variants */
.hero-section .btn-primary {
    background: var(--white);
    color: var(--gray-900);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-section .btn-primary:hover {
    background: var(--gray-100);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.hero-section .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.hero-section .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Hero Section - Immersive Experience
   ============================================ */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--space-16)) 0 var(--space-16);
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(34, 211, 238, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(56, 189, 248, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(2, 132, 199, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to top, var(--bg-primary) 0%, transparent 100%);
    pointer-events: none;
}

[data-theme="dark"] .hero-section::after {
    background: linear-gradient(to top, var(--bg-primary) 0%, transparent 100%);
}

/* Animated Grid Background */
.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
    pointer-events: none;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

/* Floating Orbs */
.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.6;
    animation: float 15s ease-in-out infinite;
    pointer-events: none;
}

.hero-orb-1 {
    width: 400px;
    height: 400px;
    background: rgba(34, 211, 238, 0.35);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.hero-orb-2 {
    width: 300px;
    height: 300px;
    background: rgba(56, 189, 248, 0.3);
    top: 60%;
    right: 15%;
    animation-delay: -5s;
}

.hero-orb-3 {
    width: 250px;
    height: 250px;
    background: rgba(2, 132, 199, 0.35);
    bottom: 20%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

/* Animated Badge */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-5);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--white);
    backdrop-filter: blur(10px);
    margin-bottom: var(--space-8);
    animation: badgePulse 3s ease-in-out infinite;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-emerald);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: var(--text-7xl);
    font-weight: 800;
    line-height: 1.1;
    color: var(--white);
    margin-bottom: var(--space-6);
    letter-spacing: -0.03em;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-emerald) 50%, var(--accent-violet) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: var(--text-xl);
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-10);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-16);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    padding-top: var(--space-10);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: var(--text-5xl);
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: var(--space-2);
    background: linear-gradient(135deg, var(--white) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================
   Animated Code Display
   ============================================ */
.hero-code-showcase {
    position: relative;
    max-width: 1000px;
    margin: var(--space-16) auto 0;
    perspective: 1000px;
}

.code-window {
    background: rgba(13, 17, 23, 0.95);
    border-radius: var(--radius-2xl);
    overflow: visible;
    box-shadow:
        0 25px 80px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform: rotateX(5deg);
    transform-style: flat; /* Changed from preserve-3d to fix click issues */
    transition: transform var(--transition-slow);
}

.code-window:hover {
    transform: rotateX(0deg);
}

.code-window-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: rgba(30, 41, 59, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.window-dots {
    display: flex;
    gap: var(--space-2);
}

.window-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.window-dot:nth-child(1) { background: #FF5F56; }
.window-dot:nth-child(2) { background: #FFBD2E; }
.window-dot:nth-child(3) { background: #27CA40; }

.window-title {
    flex: 1;
    text-align: center;
    font-size: var(--text-sm);
    color: var(--gray-400);
    font-weight: 500;
}

.code-window-body {
    padding: var(--space-6);
}

/* ============================================
   Language Switcher Tabs
   ============================================ */
.language-switcher {
    display: flex;
    gap: var(--space-1);
    padding: var(--space-2);
    position: relative;
    z-index: 10;
    transform: translateZ(0); /* Force new stacking context for 3D transforms */
    background: var(--gray-100);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    overflow-x: auto;
}

[data-theme="dark"] .language-switcher {
    background: var(--gray-800);
}

.lang-tab {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: transparent;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    position: relative;
    z-index: 11;
    -webkit-tap-highlight-color: transparent;
}

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

.lang-tab.active {
    background: var(--bg-primary);
    color: var(--primary-600);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .lang-tab.active {
    background: var(--gray-700);
}

.lang-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

/* Language Colors */
.lang-tab[data-lang="python"]::before { content: ''; background: #3776AB; }
.lang-tab[data-lang="javascript"]::before { content: ''; background: #F7DF1E; }
.lang-tab[data-lang="typescript"]::before { content: ''; background: #3178C6; }
.lang-tab[data-lang="rust"]::before { content: ''; background: #DEA584; }
.lang-tab[data-lang="go"]::before { content: ''; background: #00ADD8; }
.lang-tab[data-lang="cpp"]::before { content: ''; background: #00599C; }

/* ============================================
   Code Block Styling
   ============================================ */
.code-block-wrapper {
    position: relative;
    margin: var(--space-6) 0;
}

.code-block,
.code-example {
    background: var(--bg-code);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    overflow-x: auto;
    font-size: var(--text-sm);
    line-height: 1.7;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.code-block code,
.code-example code {
    color: #E6EDF3;
    background: transparent;
    font-family: var(--font-mono);
}

/* Syntax Highlighting */
.code-block .keyword { color: #FF7B72; }
.code-block .string { color: #A5D6FF; }
.code-block .number { color: #79C0FF; }
.code-block .comment { color: #8B949E; font-style: italic; }
.code-block .function { color: #D2A8FF; }
.code-block .variable { color: #FFA657; }
.code-block .type { color: #7EE787; }

/* Inline Code */
code {
    padding: 0.2em 0.4em;
    background: var(--gray-100);
    color: var(--primary-600);
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    font-family: var(--font-mono);
}

[data-theme="dark"] code {
    background: var(--gray-800);
    color: var(--primary-400);
}

pre code {
    padding: 0;
    background: transparent;
}

/* ============================================
   Copy Button
   ============================================ */
.copy-button {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--gray-300);
    font-size: var(--text-xs);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(4px);
}

.copy-button:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.copy-button.copied {
    background: var(--success);
    border-color: var(--success);
    color: var(--white);
}

.copy-button svg {
    width: 14px;
    height: 14px;
}

/* ============================================
   Main Content Area
   ============================================ */
.main-content {
    padding: var(--space-20) 0;
}

section {
    margin-bottom: var(--space-24);
}

/* Section Headers */
.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-16);
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-4);
    background: var(--primary-50);
    color: var(--primary-600);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

[data-theme="dark"] .section-badge {
    background: rgba(14, 165, 201, 0.1);
    color: var(--primary-400);
}

.section-title {
    font-size: var(--text-5xl);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   Ecosystem Cards Grid
   ============================================ */
.ecosystem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-10);
}

.ecosystem-card {
    position: relative;
    padding: var(--space-8);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
    overflow: hidden;
    text-decoration: none;
}

.ecosystem-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--card-accent, var(--primary-500));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.ecosystem-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
}

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

.ecosystem-card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--primary-50);
    border-radius: var(--radius-xl);
    font-size: 28px;
    margin-bottom: var(--space-5);
}

[data-theme="dark"] .ecosystem-card-icon {
    background: rgba(14, 165, 201, 0.1);
}

.ecosystem-card-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.ecosystem-card-subtitle {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
}

.ecosystem-card-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-light);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.ecosystem-card-meta strong {
    color: var(--text-tertiary);
    font-weight: 500;
}

/* ============================================
   Feature Cards with Icons
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

.feature-card {
    position: relative;
    padding: var(--space-8);
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.feature-card:hover {
    background: var(--bg-primary);
    border-color: var(--border-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    border-radius: var(--radius-lg);
    color: var(--white);
    margin-bottom: var(--space-5);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.feature-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   Comparison Section
   ============================================ */
.comparison-section {
    padding: var(--space-20) 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-3xl);
    margin: var(--space-16) 0;
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: start;
}

.comparison-box {
    background: var(--bg-primary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.comparison-box.highlight {
    border-color: var(--primary-500);
    box-shadow: var(--shadow-glow);
}

.comparison-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
}

.comparison-header h4 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.comparison-box.highlight .comparison-header {
    background: var(--primary-50);
}

[data-theme="dark"] .comparison-box.highlight .comparison-header {
    background: rgba(14, 165, 201, 0.1);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    background: var(--success);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
}

.comparison-body {
    padding: var(--space-6);
}

/* ============================================
   Stats Banner
   ============================================ */
.stats-banner {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    border-radius: var(--radius-2xl);
    padding: var(--space-10) var(--space-8);
    margin: var(--space-16) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
    text-align: center;
}

.stats-item {
    color: var(--white);
}

.stats-number {
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--space-2);
}

.stats-label {
    font-size: var(--text-sm);
    opacity: 0.8;
}

/* ============================================
   Language Cards Grid
   ============================================ */
.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-4);
}

.language-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-6);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    text-decoration: none;
    transition: all var(--transition-base);
}

.language-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-500);
}

.language-card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-3);
    object-fit: contain;
}

.language-card-name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.language-card-version {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* ============================================
   Install Section
   ============================================ */
.install-section {
    position: relative;
    padding: var(--space-16) var(--space-8);
    background: var(--gradient-hero);
    border-radius: var(--radius-3xl);
    overflow: hidden;
    text-align: center;
}

.install-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(14, 165, 201, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.install-section > * {
    position: relative;
    z-index: 1;
}

.install-section h2 {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--white);
    margin-bottom: var(--space-8);
}

.install-tabs {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-6);
}

.install-tab {
    padding: var(--space-3) var(--space-5);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    color: var(--white);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.install-tab:hover {
    background: rgba(255, 255, 255, 0.2);
}

.install-tab.active {
    background: var(--white);
    color: var(--gray-900);
    border-color: var(--white);
}

.install-command {
    max-width: 500px;
    margin: 0 auto;
    background: rgba(0, 0, 0, 0.4);
    border-radius: var(--radius-xl);
    padding: var(--space-5) var(--space-6);
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    color: var(--white);
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================
   Resources Links
   ============================================ */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.resource-link {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    text-decoration: none;
    transition: all var(--transition-base);
}

.resource-link:hover {
    border-color: var(--primary-500);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.resource-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--primary-50);
    border-radius: var(--radius-lg);
    color: var(--primary-600);
    flex-shrink: 0;
}

[data-theme="dark"] .resource-icon {
    background: rgba(14, 165, 201, 0.1);
    color: var(--primary-400);
}

.resource-content {
    flex: 1;
}

.resource-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.resource-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ============================================
   Quick Navigation Grid
   ============================================ */
.quick-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    padding: var(--space-8);
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
}

.quick-nav-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-5);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    text-decoration: none;
    transition: all var(--transition-base);
}

.quick-nav-item:hover {
    border-color: var(--primary-500);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-nav-item strong {
    color: var(--primary-600);
    font-size: var(--text-base);
    font-weight: 600;
}

.quick-nav-item span {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ============================================
   Syntax Blocks
   ============================================ */
.syntax-block {
    padding: var(--space-8);
    background: var(--bg-secondary);
    border-left: 4px solid var(--primary-500);
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
    margin: var(--space-8) 0;
}

.syntax-block h3 {
    margin-bottom: var(--space-4);
    font-size: var(--text-xl);
    color: var(--text-primary);
}

.keyword {
    color: var(--primary-600);
    font-weight: 700;
}

.value-types {
    list-style: none;
    padding: 0;
    margin: var(--space-4) 0;
}

.value-types li {
    position: relative;
    padding: var(--space-3) 0 var(--space-3) var(--space-8);
    color: var(--text-secondary);
}

.value-types li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--primary-500);
    border-radius: 50%;
}

/* ============================================
   Structures Section
   ============================================ */
.structures-section {
    background: var(--bg-secondary);
    padding: var(--space-12) var(--space-10);
    border-radius: var(--radius-2xl);
    margin: var(--space-16) 0;
}

.structures-section h2 {
    text-align: center;
    margin-bottom: var(--space-8);
}

.structure-list {
    max-width: 700px;
    margin: 0 auto;
    list-style: none;
    padding: 0;
}

.structure-list li {
    position: relative;
    padding: var(--space-5) 0 var(--space-5) var(--space-10);
    border-bottom: 1px solid var(--border-light);
    font-size: var(--text-lg);
    color: var(--text-secondary);
}

.structure-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-500);
    font-weight: bold;
    font-size: var(--text-xl);
}

.structure-list li:last-child {
    border-bottom: none;
}

/* ============================================
   Use Cases Grid
   ============================================ */
.use-case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.use-case-card {
    padding: var(--space-8);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.use-case-card:hover {
    border-color: var(--primary-500);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.use-case-card h3 {
    color: var(--primary-600);
    margin-bottom: var(--space-3);
    font-size: var(--text-lg);
    font-weight: 700;
}

.use-case-card p {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: 1.7;
    margin: 0;
}

/* ============================================
   Footer - Premium Design
   ============================================ */
.site-footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--space-20) 0 var(--space-8);
    margin-top: var(--space-24);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(4, 1fr);
    gap: var(--space-12);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid var(--gray-800);
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.footer-brand .logo img {
    width: auto;
    height: 47px;
}

.footer-brand .logo-text {
    font-size: var(--text-xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-400) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    font-size: var(--text-sm);
    line-height: 1.7;
    color: var(--gray-400);
    margin: 0;
}

.footer-section h4 {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--gray-100);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-5);
}

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

.footer-links li {
    margin-bottom: var(--space-3);
}

.footer-links a {
    font-size: var(--text-sm);
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
}

.footer-bottom p {
    font-size: var(--text-sm);
    color: var(--gray-500);
    margin: 0;
}

.footer-social {
    display: flex;
    gap: var(--space-4);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    color: var(--gray-400);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--primary-600);
    color: var(--white);
    transform: translateY(-2px);
}

/* ============================================
   Theme Toggle Button
   ============================================ */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--primary-600);
    border-color: var(--primary-500);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.theme-toggle .moon-icon {
    display: none;
}

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

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

/* ============================================
   Mobile Menu Button
   ============================================ */
.hamburger-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
}

.hamburger-menu span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 48px;
    height: 48px;
    background: var(--primary-600);
    color: var(--white);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-700);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* ============================================
   Documentation Page Styles
   ============================================ */
.doc-page {
    padding: 24px 0 var(--space-16);
}

.doc-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 48px;
    align-items: start;
}

.doc-nav {
    position: sticky;
    top: 90px;
    background: var(--bg-secondary);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.doc-nav-section {
    margin-bottom: var(--space-6);
}

.doc-nav-title {
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}

.doc-nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.doc-nav-links li {
    margin-bottom: var(--space-1);
}

.doc-nav-links a {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.doc-nav-links a:hover,
.doc-nav-links a.active {
    background: var(--primary-50);
    color: var(--primary-600);
}

[data-theme="dark"] .doc-nav-links a:hover,
[data-theme="dark"] .doc-nav-links a.active {
    background: rgba(14, 165, 201, 0.1);
}

.doc-content {
    max-width: 800px;
}

.doc-content h1 {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
}

.doc-content h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-top: var(--space-12);
    margin-bottom: var(--space-4);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-light);
}

.doc-content h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
}

.doc-content p {
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
    line-height: 1.8;
}

.doc-content ul,
.doc-content ol {
    margin-bottom: var(--space-6);
    padding-left: var(--space-6);
}

.doc-content li {
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
}

/* ============================================
   Playground Layout
   ============================================ */
.playground-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    min-height: 600px;
}

.playground-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.playground-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
}

.playground-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.playground-body {
    flex: 1;
    padding: 0;
}

.playground-textarea {
    width: 100%;
    height: 100%;
    min-height: 500px;
    padding: var(--space-5);
    background: var(--bg-code);
    border: none;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: #E6EDF3;
    resize: none;
    line-height: 1.7;
}

.playground-textarea:focus {
    outline: none;
}

/* ============================================
   Page Navigation (Prev/Next)
   ============================================ */
.page-navigation {
    display: flex;
    gap: var(--space-6);
    margin-top: var(--space-16);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-light);
}

.page-nav-link {
    flex: 1;
    padding: var(--space-6);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    text-decoration: none;
    transition: all var(--transition-base);
}

.page-nav-link:hover {
    border-color: var(--primary-500);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.page-nav-link.prev {
    text-align: left;
}

.page-nav-link.next {
    text-align: right;
}

.page-nav-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.page-nav-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--primary-600);
}

/* ============================================
   Breadcrumbs
   ============================================ */
.breadcrumbs {
    padding: var(--space-4) 0;
    margin-bottom: var(--space-6);
}

.breadcrumbs-container {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
}

.breadcrumbs a {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
    color: var(--primary-600);
}

.breadcrumbs .separator {
    color: var(--text-muted);
}

.breadcrumbs .current {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   Tables
   ============================================ */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-6) 0;
    font-size: var(--text-sm);
}

th {
    background: var(--bg-secondary);
    padding: var(--space-4);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-medium);
}

td {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

tr:hover {
    background: var(--bg-secondary);
}

/* ============================================
   Railroad Diagram
   ============================================ */
.grammar-section {
    margin: var(--space-16) 0;
}

.railroad-diagram {
    background: var(--bg-secondary);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    overflow-x: auto;
}

.railroad-diagram svg {
    width: 100%;
    height: auto;
    min-width: 700px;
}

/* ============================================
   Related Resources Box
   ============================================ */
.related-resources {
    background: var(--bg-secondary);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    border-left: 4px solid var(--primary-500);
    margin: var(--space-12) 0;
}

.related-resources h3 {
    margin-top: 0;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.related-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
}

.related-link {
    display: block;
    padding: var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-base);
}

.related-link:hover {
    border-color: var(--primary-500);
    transform: translateX(4px);
}

.related-link-title {
    display: block;
    font-weight: 600;
    color: var(--primary-600);
    margin-bottom: var(--space-1);
}

.related-link-desc {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ============================================
   Animations & Keyframes
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

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

.animate-slide-in-left {
    animation: slideInLeft 0.6s ease-out forwards;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out forwards;
}

.animate-scale-in {
    animation: scaleIn 0.5s ease-out forwards;
}

/* Staggered Animation Delays */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .nav-links {
        gap: 2px;
    }

    .nav-links a {
        padding: var(--space-2) var(--space-2);
        font-size: 0.8125rem;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .doc-layout,
    .spec-layout,
    .use-cases-layout,
    .getting-started-layout {
        grid-template-columns: 1fr;
    }

    .doc-nav {
        position: relative;
        top: 0;
        max-height: none;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .playground-layout {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--text-4xl);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-6);
    }

    .hamburger-menu {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--space-6);
        gap: var(--space-2);
        border-top: 1px solid var(--border-light);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        z-index: var(--z-dropdown);
    }

    [data-theme="dark"] .nav-links {
        background: var(--bg-primary);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        padding: var(--space-3) var(--space-4);
        border-radius: var(--radius-md);
    }

    .features-grid,
    .use-case-grid {
        grid-template-columns: 1fr;
    }

    .resources-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .page-navigation {
        flex-direction: column;
    }

    .page-nav-link.next {
        text-align: left;
    }

    .section-title {
        font-size: var(--text-3xl);
    }

    .install-section {
        padding: var(--space-10) var(--space-5);
    }

    .install-tabs {
        flex-direction: column;
        align-items: stretch;
    }

    .theme-toggle {
        position: fixed;
        bottom: var(--space-6);
        right: var(--space-6);
        z-index: var(--z-fixed);
        box-shadow: var(--shadow-lg);
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .hero-section {
        padding: calc(72px + var(--space-10)) 0 var(--space-10);
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-large {
        width: 100%;
        justify-content: center;
    }

    .code-example,
    .code-block {
        font-size: 12px;
        padding: var(--space-4);
    }

    .ecosystem-card {
        padding: var(--space-6);
    }

    .syntax-block {
        padding: var(--space-5);
    }
}

/* ============================================
   Sub-Page Consistent Layout
   ============================================ */
.page-container {
    padding-bottom: 60px;
    min-height: 100vh;
    background: var(--bg-primary);
}

.page-container > .container {
    max-width: 1400px;
}

.page-header {
    padding: 16px 0 20px;
    border-bottom: 1px solid #E2E8F0;
    margin-bottom: 24px;
}

[data-theme="dark"] .page-header {
    border-bottom-color: #334155;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: #0F172A;
    margin: 0 0 8px 0;
}

[data-theme="dark"] .page-header h1 {
    color: #F1F5F9;
}

.page-header p {
    font-size: 16px;
    color: #64748B;
    margin: 0;
    max-width: 600px;
}

.page-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 48px;
    align-items: start;
    padding-bottom: 80px;
}

.page-sidebar {
    position: sticky;
    top: 90px;
}

.sidebar-section {
    background: #F8FAFC;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #E2E8F0;
    margin-bottom: 16px;
}

[data-theme="dark"] .sidebar-section {
    background: #1E293B;
    border-color: #334155;
}

.sidebar-section h3 {
    margin: 0 0 16px 0;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #0B84A1;
}

.sidebar-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-section li {
    margin-bottom: 6px;
}

.sidebar-section a {
    text-decoration: none;
    color: #64748B;
    font-size: 14px;
    transition: color 0.15s;
    display: block;
    padding: 6px 0;
}

.sidebar-section a:hover {
    color: #0B84A1;
}

.page-main {
    min-width: 0;
}

.page-main h2 {
    font-size: 24px;
    font-weight: 700;
    color: #0F172A;
    margin: 0 0 16px 0;
    scroll-margin-top: 100px;
}

[data-theme="dark"] .page-main h2 {
    color: #F1F5F9;
}

.page-main h3 {
    font-size: 18px;
    font-weight: 600;
    color: #0F172A;
    margin: 32px 0 12px 0;
}

[data-theme="dark"] .page-main h3 {
    color: #F1F5F9;
}

.page-main p {
    color: #475569;
    line-height: 1.7;
    margin-bottom: 16px;
}

[data-theme="dark"] .page-main p {
    color: #94A3B8;
}

.content-section {
    margin-bottom: 48px;
    scroll-margin-top: 100px;
}

.content-card {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
}

[data-theme="dark"] .content-card {
    background: #1E293B;
    border-color: #334155;
}

.content-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: #0B84A1;
    margin: 0 0 12px 0;
}

/* Responsive sub-pages */
@media (max-width: 1024px) {
    .page-layout {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .page-sidebar {
        position: relative;
        top: 0;
    }
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 28px;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .navbar,
    .back-to-top,
    .theme-toggle,
    .hamburger-menu {
        display: none !important;
    }

    .hero-section {
        background: white !important;
        color: black !important;
        padding: 2rem 0 !important;
    }

    .hero-title,
    .hero-subtitle {
        color: black !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    .container {
        max-width: 100%;
    }
}

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

    html {
        scroll-behavior: auto;
    }
}

/* Focus Visible */
:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}