:root {
    /* Base spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Typography */
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --font-code: 'JetBrains Mono', monospace;

    /* Theme-independent colors */
    --primary-red: #ff3b30;
    --primary-blue: #007aff;
    --accent-gradient: linear-gradient(135deg, var(--primary-red), var(--primary-blue));
    --sidebar-width: 280px;
}

/* Dark Theme (Default) */
[data-theme="dark"] {
    --bg-page: #0a0e14;
    --bg-sidebar: #11151c;
    --bg-header: rgba(17, 21, 28, 0.85);
    --bg-card: #161b22;
    --bg-code: #0d1117;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #484f58;
    --border: #30363d;
    --nav-hover: rgba(255, 255, 255, 0.05);
    --accent-text: #58a6ff;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* Light Theme */
[data-theme="light"] {
    --bg-page: #f6f8fa;
    --bg-sidebar: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.85);
    --bg-card: #ffffff;
    --bg-code: #f6f8fa;
    --text-primary: #1f2328;
    --text-secondary: #636c76;
    --text-muted: #8c959f;
    --border: #d0d7de;
    --nav-hover: rgba(0, 0, 0, 0.03);
    --accent-text: #0969da;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Layout Structure */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Header / Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--bg-header);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
}

.nav-container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    margin-left: var(--spacing-xl);
    flex: 1;
}

.nav-link-ext {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link-ext:hover {
    color: var(--accent-text);
}

.github-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    color: var(--text-primary);
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    background: var(--bg-card);
}

.github-btn:hover {
    background: var(--nav-hover);
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--nav-hover);
}

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

/* Sidebar */
.sidebar {
    position: fixed;
    top: 64px;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: var(--spacing-lg) var(--spacing-md);
    z-index: 900;
    z-index: 900;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 4px;
}

.sidebar-nav a {
    display: block;
    padding: 8px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.sidebar-nav a:hover {
    background: var(--nav-hover);
    color: var(--text-primary);
}

.sidebar-nav a.active {
    background: var(--nav-hover);
    color: var(--accent-text);
    font-weight: 600;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: 64px;
    flex: 1;
    padding: var(--spacing-xl) 0;
    max-width: 100%;
}

.content-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Sections */
.section {
    margin-bottom: var(--spacing-xl);
    scroll-margin-top: 100px;
}

h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    letter-spacing: -0.5px;
}

h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

/* Hero Section */
.hero {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 800;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.hero-btn.github {
    background: var(--text-primary);
    color: var(--bg-page);
    border: 1px solid var(--text-primary);
}

.hero-btn.github:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    filter: brightness(0.9);
}

[data-theme="light"] .hero-btn.github {
    background: #24292f;
    color: white;
}

/* Code Blocks */
.code-block {
    position: relative;
    margin: var(--spacing-md) 0;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-code);
}

.code-block pre {
    margin: 0 !important;
    padding: var(--spacing-md) !important;
    background: transparent !important;
}

code {
    font-family: var(--font-code);
    font-size: 0.9em;
}

/* Language Switcher in Sidebar */
.lang-switcher-inline {
    display: flex;
    gap: 4px;
    margin-bottom: var(--spacing-lg);
    background: var(--nav-hover);
    padding: 4px;
    border-radius: 8px;
}

.lang-switcher-inline button {
    flex: 1;
    padding: 6px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.lang-switcher-inline button.active {
    background: var(--bg-sidebar);
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Cards & Information Boxes */
.card,
.method-card,
.practice-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: var(--spacing-lg);
    border-radius: 10px;
    margin: var(--spacing-md) 0;
    box-shadow: var(--shadow);
}

.info-box,
.warning-box {
    padding: var(--spacing-md);
    border-radius: 8px;
    margin: var(--spacing-md) 0;
    border-left: 4px solid;
}

.info-box {
    background: rgba(0, 122, 255, 0.05);
    border-color: var(--primary-blue);
}

.warning-box {
    background: rgba(255, 159, 10, 0.05);
    border-color: #ff9f0a;
}

/* Framework Tabs */
.framework-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--spacing-md);
}

.tab-btn {
    padding: 10px 20px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-text);
    border-bottom-color: var(--accent-text);
}

.framework-content {
    display: none;
}

.framework-content.active {
    display: block;
}

/* AI Features Styling */
.ai-card {
    background: linear-gradient(135deg, rgba(255, 59, 48, 0.08) 0%, rgba(0, 122, 255, 0.08) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
}

.ai-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    gap: var(--spacing-md);
}

.ai-header h3 {
    margin: 0;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ai-action-btn {
    padding: 8px 16px;
    background: var(--accent-gradient);
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    white-space: nowrap;
}

.ai-action-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.ai-action-btn.small {
    padding: 4px 12px;
    font-size: 0.75rem;
}

.ai-compact-btn {
    padding: 4px 10px;
    background: rgba(0, 122, 255, 0.1);
    border: 1px solid var(--primary-blue);
    border-radius: 6px;
    color: var(--primary-blue);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
}

.ai-header-inline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.section-title-ai {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.section-title-ai h2 {
    margin-bottom: 0;
}

/* Floating AI Button */
.ai-ask-btn.floating {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-lg);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-primary);
    font-weight: 700;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.ai-ask-btn.floating:hover {
    transform: translateY(-5px);
    border-color: var(--primary-blue);
    box-shadow: 0 12px 40px rgba(0, 122, 255, 0.2);
}

.ai-sparkle {
    font-size: 1.2rem;
}

/* Sidebar Extra Sections */
.sidebar-divider {
    height: 1px;
    background: var(--border);
    margin: var(--spacing-lg) 0;
}

.sidebar-extra {
    padding: 0 12px;
}

.sidebar-extra h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.sidebar-extra ul {
    list-style: none;
}

.sidebar-extra li {
    margin-bottom: 8px;
}

.sidebar-extra a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.sidebar-extra a:hover {
    color: var(--accent-text);
}

/* Updated Responsiveness */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .nav-links {
        display: none;
    }
}

@media (min-width: 1025px) {
    .mobile-toggle {
        display: none;
    }
}

@media (max-width: 768px) {
    .content-container {
        padding: 0 var(--spacing-md);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero .subtitle {
        font-size: 1rem;
    }

    .nav-brand h1 {
        font-size: 1.1rem;
    }

    .section {
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .nav-controls {
        gap: var(--spacing-xs);
    }

    .github-btn {
        padding: 6px;
    }
}

/* Prism Overrides */
pre[class*="language-"] {
    background: transparent !important;
}

code[class*="language-"] {
    text-shadow: none !important;
}