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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #a855f7;
    --bg: #0f0f23;
    --surface: #1a1a2e;
    --surface-light: #252542;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #2d2d4a;
    --code-bg: #0d0d1a;
    --code-text: #e2e8f0;
    --accent: #22d3ee;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
}

/* Mobile Header */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 0 1rem;
    align-items: center;
    justify-content: space-between;
}

.mobile-header h1 {
    font-size: 1.25rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Sidebar - Desktop */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 250px;
    height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 2rem 1rem;
    overflow-y: auto;
    z-index: 999;
}

.sidebar h1 {
    color: var(--primary);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding: 0 0.5rem;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    margin-bottom: 0.25rem;
}

.sidebar a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all 0.2s;
    font-size: 0.95rem;
}

.sidebar a:hover {
    background: var(--surface-light);
    color: var(--primary);
}

/* Main Content */
main {
    margin-left: 250px;
    padding: 3rem;
    max-width: 900px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: var(--text);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.25rem;
    margin: 1.5rem 0 0.5rem;
    color: var(--accent);
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

section {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 1rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

/* Code Blocks */
pre {
    background: var(--code-bg);
    color: var(--code-text);
    padding: 1rem;
    border-radius: 0.75rem;
    overflow-x: auto;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    border: 1px solid var(--border);
    white-space: pre-wrap;
    word-wrap: break-word;
}

code {
    background: var(--code-bg);
    color: var(--accent);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
}

pre code {
    background: none;
    padding: 0;
    color: var(--code-text);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    display: block;
    overflow-x: auto;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

th {
    background: var(--surface-light);
    font-weight: 600;
    color: var(--text);
}

td {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Lists */
ul, ol {
    padding-left: 1.25rem;
    margin: 1rem 0;
}

li {
    margin: 0.5rem 0;
    color: var(--text-muted);
}

/* Features Grid */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.feature {
    background: var(--surface-light);
    padding: 1rem;
    border-radius: 0.75rem;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border);
}

.feature h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.feature p {
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    font-size: 0.85rem;
}

.feature pre {
    font-size: 0.75rem;
    padding: 0.75rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    main {
        padding: 2rem;
    }
    
    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    /* Show mobile header */
    .mobile-header {
        display: flex;
    }
    
    /* Hide sidebar, show as overlay */
    .sidebar {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100vh - 60px);
        border-right: none;
        border-top: 1px solid var(--border);
        padding: 1rem;
    }
    
    .sidebar.active {
        display: block;
    }
    
    .sidebar ul {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    
    .sidebar a {
        padding: 0.75rem;
        text-align: center;
        font-size: 0.85rem;
    }
    
    /* Adjust main content */
    main {
        margin-left: 0;
        margin-top: 60px;
        padding: 1rem;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.25rem;
    }
    
    h3 {
        font-size: 1.1rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    section {
        padding: 1rem;
        margin-bottom: 1rem;
        border-radius: 0.75rem;
    }
    
    pre {
        font-size: 0.75rem;
        padding: 0.75rem;
    }
    
    code {
        font-size: 0.75rem;
    }
    
    /* Make tables scrollable */
    table {
        font-size: 0.75rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 14px;
    }
    
    main {
        padding: 0.75rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    h2 {
        font-size: 1.1rem;
    }
    
    .sidebar ul {
        grid-template-columns: 1fr;
    }
    
    pre {
        font-size: 0.7rem;
        padding: 0.5rem;
    }
    
    code {
        font-size: 0.7rem;
    }
}

/* Touch-friendly interactions */
@media (hover: none) {
    .sidebar a:active {
        background: var(--surface-light);
        color: var(--primary);
    }
    
    button:active {
        opacity: 0.8;
    }
}

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

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

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