programing\css\styles.css
```

```css
/* =====================================================
   Programming Website - Comprehensive CSS Framework
   ===================================================== */

/* =====================================================
   CSS Variables - Design Tokens
   ===================================================== */
:root {
    /* Primary Colors - Blue Tech Theme */
    --primary: #2563EB;
    --primary-light: #3B82F6;
    --primary-dark: #1D4ED8;
    --primary-hover: #1E40AF;

    /* Secondary Colors */
    --secondary: #0F172A;
    --secondary-light: #1E293B;

    /* Accent Colors */
    --accent: #F59E0B;
    --accent-light: #FBBF24;
    --accent-green: #10B981;
    --accent-purple: #8B5CF6;
    --accent-red: #EF4444;
    --accent-cyan: #06B6D4;

    /* Neutral Colors */
    --white: #FFFFFF;
    --black: #000000;
    --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;

    /* Background Colors */
    --bg-primary: var(--gray-50);
    --bg-secondary: var(--white);
    --bg-card: var(--white);
    --bg-dark: var(--secondary);

    /* Text Colors */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-light: var(--gray-500);
    --text-muted: var(--gray-400);
    --text-inverse: var(--white);

    /* Border Colors */
    --border-color: var(--gray-200);
    --border-light: var(--gray-100);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 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-primary: 0 4px 14px 0 rgba(37, 99, 235, 0.3);

    /* Border Radius */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Spacing */
    --space-xs: 0.25rem;    /* 4px */
    --space-sm: 0.5rem;     /* 8px */
    --space-md: 1rem;       /* 16px */
    --space-lg: 1.5rem;     /* 24px */
    --space-xl: 2rem;       /* 32px */
    --space-2xl: 3rem;      /* 48px */
    --space-3xl: 4rem;      /* 64px */
    --space-4xl: 6rem;      /* 96px */

    /* Typography */
    --font-family: 'Tajawal', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-family-en: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-xs: 0.75rem;     /* 12px */
    --font-size-sm: 0.875rem;    /* 14px */
    --font-size-base: 1rem;      /* 16px */
    --font-size-lg: 1.125rem;    /* 18px */
    --font-size-xl: 1.25rem;     /* 20px */
    --font-size-2xl: 1.5rem;     /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;    /* 36px */
    --font-size-5xl: 3rem;       /* 48px */
    --font-size-6xl: 3.75rem;    /* 60px */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Transitions */
    --transition-fast: 150ms;
    --transition: 250ms;
    --transition-slow: 350ms;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;

    /* Container */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
    --container-padding: 1.5rem;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg-primary: var(--secondary);
    --bg-secondary: var(--secondary-light);
    --bg-card: var(--secondary-light);
    --bg-dark: var(--black);

    --text-primary: var(--gray-100);
    --text-secondary: var(--gray-300);
    --text-light: var(--gray-400);
    --text-muted: var(--gray-500);
    --text-inverse: var(--gray-900);

    --border-color: var(--gray-700);
    --border-light: var(--gray-800);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color var(--transition), color var(--transition);
}

/* Improve media defaults */
img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input, button, textarea, select {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

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

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin: 0;
}

p {
    margin: 0;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: var(--space-lg) 0;
}

/* Remove default fieldset styles */
fieldset {
    border: 0;
    padding: 0;
    margin: 0;
    min-width: 0;
}

legend {
    padding: 0;
}

/* =====================================================
   Typography
   ===================================================== */
h1, .h1 {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    letter-spacing: -0.025em;
}

h2, .h2 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
}

h3, .h3 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.01em;
}

h4, .h4 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
}

h5, .h5 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

h6, .h6 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
}

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }
.text-5xl { font-size: var(--font-size-5xl); }

.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-extrabold { font-weight: var(--font-weight-extrabold); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-light { color: var(--text-light); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.text-success { color: var(--accent-green); }
.text-error { color: var(--accent-red); }
.text-warning { color: var(--accent); }
.text-inverse { color: var(--text-inverse); }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.uppercase { text-transform: uppercase; }
.capitalize { text-transform: capitalize; }
.lowercase { text-transform: lowercase; }

.line-tight { line-height: var(--line-height-tight); }
.line-normal { line-height: var(--line-height-normal); }
.line-relaxed { line-height: var(--line-height-relaxed); }

/* =====================================================
   Layout Utilities
   ===================================================== */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-xl { max-width: var(--container-xl); }
.container-2xl { max-width: var(--container-2xl); }

.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-none { flex: none; }

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

.grid-rows-1 { grid-template-rows: repeat(1, minmax(0, 1fr)); }
.grid-rows-2 { grid-template-rows: repeat(2, minmax(0, 1fr)); }
.grid-rows-3 { grid-template-rows: repeat(3, minmax(0, 1fr)); }

.col-span-1 { grid-column: span 1 / span 1; }
.col-span-2 { grid-column: span 2 / span 2; }
.col-span-3 { grid-column: span 3 / span 3; }
.col-span-4 { grid-column: span 4 / span 4; }
.col-span-5 { grid-column: span 5 / span 5; }
.col-span-6 { grid-column: span 6 / span 6; }

.row-span-1 { grid-row: span 1 / span 1; }
.row-span-2 { grid-row: span 2 / span 2; }
.row-span-3 { grid-row: span 3 / span 3; }

/* Spacing Utilities */
.m-auto { margin: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

.m-0 { margin: 0; }
.m-xs { margin: var(--space-xs); }
.m-sm { margin: var(--space-sm); }
.m-md { margin: var(--space-md); }
.m-lg { margin: var(--space-lg); }
.m-xl { margin: var(--space-xl); }
.m-2xl { margin: var(--space-2xl); }

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }

.ml-0 { margin-left: 0; }
.ml-xs { margin-left: var(--space-xs); }
.ml-sm { margin-left: var(--space-sm); }
.ml-md { margin-left: var(--space-md); }
.ml-lg { margin-left: var(--space-lg); }
.ml-xl { margin-left: var(--space-xl); }
.ml-auto { margin-left: auto; }

.mr-0 { margin-right: 0; }
.mr-xs { margin-right: var(--space-xs); }
.mr-sm { margin-right: var(--space-sm); }
.mr-md { margin-right: var(--space-md); }
.mr-lg { margin-right: var(--space-lg); }
.mr-xl { margin-right: var(--space-xl); }
.mr-auto { margin-right: auto; }

.p-0 { padding: 0; }
.p-xs { padding: var(--space-xs); }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.p-2xl { padding: var(--space-2xl); }

.px-0 { padding-left: 0; padding-right: 0; }
.px-xs { padding-left: var(--space-xs); padding-right: var(--space-xs); }
.px-sm { padding-left: var(--space-sm); padding-right: var(--space-sm); }
.px-md { padding-left: var(--space-md); padding-right: var(--space-md); }
.px-lg { padding-left: var(--space-lg); padding-right: var(--space-lg); }
.px-xl { padding-left: var(--space-xl); padding-right: var(--space-xl); }
.px-2xl { padding-left: var(--space-2xl); padding-right: var(--space-2xl); }

.py-0 { padding-top: 0; padding-bottom: 0; }
.py-xs { padding-top: var(--space-xs); padding-bottom: var(--space-xs); }
.py-sm { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-md { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.py-lg { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }
.py-xl { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }
.py-2xl { padding-top: var(--space-2xl); padding-bottom: var(--space-2xl); }

.pt-0 { padding-top: 0; }
.pt-md { padding-top: var(--space-md); }
.pt-lg { padding-top: var(--space-lg); }
.pt-xl { padding-top: var(--space-xl); }
.pt-2xl { padding-top: var(--space-2xl); }
.pt-3xl { padding-top: var(--space-3xl); }

.pb-0 { padding-bottom: 0; }
.pb-md { padding-bottom: var(--space-md); }
.pb-lg { padding-bottom: var(--space-lg); }
.pb-xl { padding-bottom: var(--space-xl); }
.pb-2xl { padding-bottom: var(--space-2xl); }
.pb-3xl { padding-bottom: var(--space-3xl); }

.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }
.min-h-screen-75 { min-height: 75vh; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }
.overflow-visible { overflow: visible; }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }
.cursor-not-allowed { cursor: not-allowed; }
.cursor-grab { cursor: grab; }

/* =====================================================
   Background Utilities
   ===================================================== */
.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-accent { background-color: var(--accent); }
.bg-success { background-color: var(--accent-green); }
.bg-error { background-color: var(--accent-red); }
.bg-warning { background-color: var(--accent); }
.bg-white { background-color: var(--white); }
.bg-transparent { background-color: transparent; }

.bg-gray-50 { background-color: var(--gray-50); }
.bg-gray-100 { background-color: var(--gray-100); }
.bg-gray-200 { background-color: var(--gray-200); }
.bg-gray-300 { background-color: var(--gray-300); }
.bg-gray-400 { background-color: var(--gray-400); }
.bg-gray-500 { background-color: var(--gray-500); }
.bg-gray-600 { background-color: var(--gray-600); }
.bg-gray-700 { background-color: var(--gray-700); }
.bg-gray-800 { background-color: var(--gray-800); }
.bg-gray-900 { background-color: var(--gray-900); }

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.bg-gradient-accent {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
}

.bg-gradient-dark {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--gray-900) 100%);
}

.bg-gradient-hero {
    background:
        radial-gradient(ellipse at top right, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at bottom left, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
        var(--bg-primary);
}

.bg-pattern {
    background-image:
        radial-gradient(circle at 25% 25%, var(--border-color) 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, var(--border-color) 1px, transparent 1px);
    background-size: 30px 30px;
}

.bg-dots {
    background-image: radial-gradient(circle, var(--border-color) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* =====================================================
   Border Utilities
   ===================================================== */
.border { border: 1px solid var(--border-color); }
.border-2 { border: 2px solid var(--border-color); }
.border-0 { border: 0; }

.border-t { border-top: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }
.border-l { border-left: 1px solid var(--border-color); }
.border-r { border-right: 1px solid var(--border-color); }

.border-primary { border-color: var(--primary); }
.border-secondary { border-color: var(--secondary); }
.border-accent { border-color: var(--accent); }
.border-white { border-color: var(--white); }
.border-transparent { border-color: transparent; }

.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded { border-radius: var(--radius); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.rounded-t-sm { border-top-left-radius: var(--radius-sm); border-top-right-radius: var(--radius-sm); }
.rounded-t { border-top-left-radius: var(--radius); border-top-right-radius: var(--radius); }
.rounded-b-sm { border-bottom-left-radius: var(--radius-sm); border-bottom-right-radius: var(--radius-sm); }
.rounded-b { border-bottom-left-radius: var(--radius); border-bottom-right-radius: var(--radius); }

/* =====================================================
   Shadow Utilities
   ===================================================== */
.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }
.shadow-primary { box-shadow: var(--shadow-primary); }

.hover-shadow:hover { box-shadow: var(--shadow-lg); }
.hover-shadow-lg:hover { box-shadow: var(--shadow-xl); }

/* =====================================================
   Component - Buttons
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: var(--radius);
    transition: all var(--transition);
    user-select: none;
}

.btn:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
}

.btn-xl {
    padding: var(--space-md) var(--space-2xl);
    font-size: var(--font-size-lg);
}

/* Button Variants */
.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

.btn-secondary {
    background-color: var(--secondary);
    color: var(--white);
    border-color: var(--secondary);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--secondary-light);
    border-color: var(--secondary-light);
    transform: translateY(-2px);
}

.btn-accent {
    background-color: var(--accent);
    color: var(--gray-900);
    border-color: var(--accent);
}

.btn-accent:hover:not(:disabled) {
    background-color: var(--accent-light);
    border-color: var(--accent-light);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-outline-light {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline-light:hover:not(:disabled) {
    background-color: var(--white);
    color: var(--secondary);
    transform: translateY(-2px);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-primary);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--gray-100);
}

[data-theme="dark"] .btn-ghost:hover:not(:disabled) {
    background-color: var(--gray-700);
}

.btn-white {
    background-color: var(--white);
    color: var(--secondary);
    border-color: var(--white);
}

.btn-white:hover:not(:disabled) {
    background-color: var(--gray-100);
    border-color: var(--gray-100);
    transform: translateY(-2px);
}

.btn-success {
    background-color: var(--accent-green);
    color: var(--white);
    border-color: var(--accent-green);
}

.btn-success:hover:not(:disabled) {
    background-color: #059669;
    border-color: #059669;
    transform: translateY(-2px);
}

.btn-error {
    background-color: var(--accent-red);
    color: var(--white);
    border-color: var(--accent-red);
}

.btn-error:hover:not(:disabled) {
    background-color: #DC2626;
    border-color: #DC2626;
    transform: translateY(-2px);
}

/* Button Group */
.btn-group {
    display: inline-flex;
    gap: var(--space-sm);
}

.btn-group .btn {
    margin: 0;
}

.btn-group .btn:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.btn-group .btn:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* =====================================================
   Component - Cards
   ===================================================== */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-body {
    padding: var(--space-lg);
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.card-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-primary);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-sm);
}

.card-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-light);
    margin-bottom: var(--space-md);
}

.card-description {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--primary);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition);
}

.card-link:hover {
    gap: var(--space-md);
}

.card-link i {
    transition: transform var(--transition);
}

.card-link:hover i {
    transform: translateX(4px);
}

/* Card Variants */
.card-elevated {
    box-shadow: var(--shadow-lg);
}

.card-elevated:hover {
    box-shadow: var(--shadow-xl);
}

.card-bordered {
    border-width: 2px;
}

.card-gradient {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--gray-50) 100%);
}

[data-theme="dark"] .card-gradient {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--secondary) 100%);
}

.card-interactive {
    cursor: pointer;
}

.card-interactive:hover {
    border-color: var(--primary);
}

/* Card Grid */
.card-grid {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

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

.card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* =====================================================
   Component - Badges
   ===================================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
}

.badge-primary {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.badge-secondary {
    background-color: rgba(15, 23, 42, 0.1);
    color: var(--secondary);
}

.badge-accent {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--accent);
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
}

.badge-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
}

.badge-outline {
    background-color: transparent;
    border: 1px solid currentColor;
}

/* =====================================================
   Component - Form Elements
   ===================================================== */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%2364748b' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right var(--space-sm) center;
    background-repeat: no-repeat;
    background-size: 20px;
    padding-right: var(--space-2xl);
}

.form-checkbox,
.form-radio {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.form-hint {
    margin-top: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.form-error {
    margin-top: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--accent-red);
}

/* Input Sizes */
.form-input-sm {
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-sm);
}

.form-input-lg {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-lg);
}

/* =====================================================
   Component - Navigation
   ===================================================== */
.nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

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

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    transition: all var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link i {
    font-size: var(--font-size-lg);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background-color: var(--bg-card);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

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

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-extrabold);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

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

.navbar-toggler {
    display: none;
    padding: var(--space-sm);
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

@media (max-width: 992px) {
    .navbar-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: var(--space-lg);
        background-color: var(--bg-card);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: transform var(--transition);
    }

    .navbar-menu.active {
        transform: translateX(0);
    }

    .navbar-toggler {
        display: block;
    }
}

/* =====================================================
   Component - Hero Section
   ===================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background-color: var(--bg-primary);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at top right, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at bottom left, rgba(245, 158, 11, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 25% 25%, var(--border-color) 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, var(--border-color) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.hero-content {
    max-width: 700px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.03em;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-xl);
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
}

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

.hero-stat-number {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-extrabold);
    color: var(--primary);
    line-height: 1;
}

.hero-stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.hero-image {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 45%;
    max-width: 600px;
    z-index: 1;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2xl);
}

.hero-floating {
    position: absolute;
    animation: float 6s ease-in-out infinite;
}

.hero-floating-1 {
    top: 20%;
    right: 10%;
    animation-delay: 0s;
}

.hero-floating-2 {
    bottom: 20%;
    right: 20%;
    animation-delay: 2s;
}

.hero-floating-3 {
    top: 40%;
    right: 5%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@media (max-width: 992px) {
    .hero {
        min-height: auto;
        padding: 120px 0 var(--space-3xl);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-image {
        position: relative;
        width: 100%;
        max-width: 100%;
        margin-top: var(--space-2xl);
        transform: none;
        top: auto;
        right: auto;
    }

    .hero-stats {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

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

/* =====================================================
   Component - Sections
   ===================================================== */
.section {
    padding: var(--space-4xl) 0;
}

.section-sm {
    padding: var(--space-2xl) 0;
}

.section-lg {
    padding: var(--space-4xl) 0;
}

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

.section-dark {
    background-color: var(--secondary);
    color: var(--text-inverse);
}

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

.section-pattern {
    background-image:
        radial-gradient(circle at 25% 25%, rgba(37, 99, 235, 0.1) 1px, transparent 1px),
        radial-gradient(circle at 75% 75%, rgba(245, 158, 11, 0.1) 1px, transparent 1px);
    background-size: 40px 40px;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

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

/* =====================================================
   Component - Category Cards
   ===================================================== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.category-card {
    position: relative;
    padding: var(--space-xl);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    cursor: pointer;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

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

.category-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.category-icon i {
    font-size: var(--font-size-2xl);
    color: var(--white);
}

.category-icon.icon-python { background: linear-gradient(135deg, #3776AB 0%, #306998 100%); }
.category-icon.icon-javascript { background: linear-gradient(135deg, #F7DF1E 0%, #E5BF2E 100%); }
.category-icon.icon-react { background: linear-gradient(135deg, #61DAFB 0%, #21A1CB 100%); }
.category-icon.icon-vue { background: linear-gradient(135deg, #4FC08D 0%, #3B9E6D 100%); }
.category-icon.icon-angular { background: linear-gradient(135deg, #DD0031 0%, #B3002D 100%); }
.category-icon.icon-node { background: linear-gradient(135deg, #339933 0%, #2E7D32 100%); }
.category-icon.icon-rust { background: linear-gradient(135deg, #DEA584 0%, #C46B4F 100%); }
.category-icon.icon-go { background: linear-gradient(135deg, #00ADD8 0%, #008BAC 100%); }
.category-icon.icon-swift { background: linear-gradient(135deg, #FA7343 0%, #E85D2A 100%); }
.category-icon.icon-kotlin { background: linear-gradient(135deg, #7F52FF 0%, #6B42D9 100%); }
.category-icon.icon-java { background: linear-gradient(135deg, #ED8B00 0%, #D47800 100%); }
.category-icon.icon-cpp { background: linear-gradient(135deg, #00599C 0%, #004B8C 100%); }
.category-icon.icon-csharp { background: linear-gradient(135deg, #68217A 0%, #561C65 100%); }
.category-icon.icon-php { background: linear-gradient(135deg, #777BB4 0%, #5C5C99 100%); }
.category-icon.icon-typescript { background: linear-gradient(135deg, #3178C6 0%, #2A5C9E 100%); }
.category-icon.icon-django { background: linear-gradient(135deg, #092E20 0%, #0A3D2C 100%); }
.category-icon.icon-laravel { background: linear-gradient(135deg, #FF2D20 0%, #D9261A 100%); }
.category-icon.icon-unity { background: linear-gradient(135deg, #000000 0%, #1A1A1A 100%); }
.category-icon.icon-unreal { background: linear-gradient(135deg, #313131 0%, #0E0E0E 100%); }
.category-icon.icon-godot { background: linear-gradient(135deg, #478CBF 0%, #2E6B8F 100%); }

.category-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-sm);
}

.category-desc {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-md);
}

.category-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--primary);
    transition: all var(--transition);
}

.category-link:hover {
    gap: var(--space-md);
}

.category-link i {
    transition: transform var(--transition);
}

.category-link:hover i {
    transform: translateX(4px);
}

/* =====================================================
   Component - Course Cards
   ===================================================== */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.course-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.course-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

.course-card:hover .course-image img {
    transform: scale(1.1);
}

.course-category {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background-color: var(--primary);
    color: var(--white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    border-radius: var(--radius-sm);
}

.course-info {
    padding: var(--space-lg);
}

.course-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-sm);
    line-height: var(--line-height-tight);
}

.course-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.course-meta i {
    color: var(--primary);
}

.course-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: var(--font-weight-medium);
    color: var(--primary);
    transition: all var(--transition);
}

.course-link:hover {
    gap: var(--space-md);
}

/* =====================================================
   Component - Feature Box
   ===================================================== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.feature-box {
    padding: var(--space-xl);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

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

.feature-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.feature-icon i {
    font-size: var(--font-size-xl);
    color: var(--primary);
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-sm);
}

.feature-desc {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* =====================================================
   Component - Pricing Table
   ===================================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    align-items: start;
}

.pricing-card {
    padding: var(--space-xl);
    background-color: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition);
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
    border-color: var(--primary);
    position: relative;
}

.pricing-card.featured::before {
    content: 'Most Popular';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-xs) var(--space-md);
    background-color: var(--primary);
    color: var(--white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
}

.pricing-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-sm);
}

.pricing-price {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--space-md);
}

.pricing-price span {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-normal);
    color: var(--text-muted);
}

.pricing-features {
    margin: var(--space-xl) 0;
    text-align: right;
}

.pricing-features li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features i {
    margin-left: var(--space-sm);
    color: var(--accent-green);
}

/* =====================================================
   Component - Testimonial
   ===================================================== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.testimonial-card {
    padding: var(--space-xl);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.testimonial-quote {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-lg);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: var(--font-weight-bold);
}

.testimonial-info h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
}

.testimonial-info p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* =====================================================
   Component - CTA Section
   ===================================================== */
.cta-section {
    position: relative;
    padding: var(--space-4xl) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at top right, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom left, rgba(245, 158, 11, 0.2) 0%, transparent 50%);
    pointer-events: none;
}

.cta-container {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--space-md);
}

.cta-subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--space-xl);
    line-height: var(--line-height-relaxed);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* =====================================================
   Component - Footer
   ===================================================== */
.footer {
    background-color: var(--secondary);
    color: var(--text-inverse);
    padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand {
    max-width: 350px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--space-md);
}

.footer-logo img {
    width: 40px;
    height: 40px;
}

.footer-desc {
    color: var(--gray-400);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-lg);
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-700);
    border-radius: var(--radius);
    color: var(--white);
    transition: all var(--transition);
}

.footer-social a:hover {
    background-color: var(--primary);
    transform: translateY(-4px);
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-lg);
}

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

.footer-links a {
    color: var(--gray-400);
    font-size: var(--font-size-base);
    transition: all var(--transition);
}

.footer-links a:hover {
    color: var(--white);
    padding-right: var(--space-sm);
}

.footer-newsletter p {
    color: var(--gray-400);
    margin-bottom: var(--space-md);
}

.footer-newsletter-form {
    display: flex;
    gap: var(--space-sm);
}

.footer-newsletter-form input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--gray-700);
    border: 1px solid var(--gray-600);
    border-radius: var(--radius);
    color: var(--white);
}

.footer-newsletter-form input::placeholder {
    color: var(--gray-500);
}

.footer-newsletter-form button {
    padding: var(--space-sm) var(--space-md);
    background-color: var(--primary);
    color: var(--white);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.footer-newsletter-form button:hover {
    background-color: var(--primary-hover);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--gray-700);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-bottom p {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-lg);
}

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

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

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-brand {
        grid-column: span 1;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* =====================================================
   Component - Breadcrumb
   ===================================================== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

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

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
}

/* =====================================================
   Component - Pagination
   ===================================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
}

.pagination-item {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition);
    cursor: pointer;
}

.pagination-item:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.pagination-item.active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =====================================================
   Component - Tabs
   ===================================================== */
.tabs {
    margin-bottom: var(--space-xl);
}

.tabs-nav {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    gap: var(--space-md);
}

.tab-trigger {
    padding: var(--space-md) var(--space-lg);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--transition);
    cursor: pointer;
}

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

.tab-trigger.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    padding: var(--space-lg) 0;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* =====================================================
   Component - Accordion
   ===================================================== */
.accordion {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.accordion-item {
    border-bottom: 1px solid var(--border-color);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    width: 100%;
    padding: var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-card);
    color: var(--text-primary);
    font-weight: var(--font-weight-semibold);
    text-align: right;
    cursor: pointer;
    transition: all var(--transition);
}

.accordion-header:hover {
    background-color: var(--bg-primary);
}

.accordion-header i {
    transition: transform var(--transition);
}

.accordion-item.active .accordion-header i {
    transform: rotate(180deg);
}

.accordion-content {
    padding: 0 var(--space-lg);
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition);
}

.accordion-item.active .accordion-content {
    padding: var(--space-lg);
    max-height: 500px;
}

.accordion-body {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* =====================================================
   Component - Modal
   ===================================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2xl);
    transform: scale(0.9);
    transition: transform var(--transition);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: all var(--transition);
}

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

.modal-body {
    padding: var(--space-lg);
}

.modal-footer {
    padding: var(--space-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
}

/* =====================================================
   Component - Toast Notification
   ===================================================== */
.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    left: var(--space-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background-color: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
}

.toast-success .toast-icon {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
}

.toast-error .toast-icon {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
}

.toast-warning .toast-icon {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--accent);
}

.toast-info .toast-icon {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

.toast-message {
    flex: 1;
    color: var(--text-primary);
}

.toast-close {
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition);
}

.toast-close:hover {
    color: var(--text-primary);
}

/* =====================================================
   Component - Avatar
   ===================================================== */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    font-weight: var(--font-weight-semibold);
    overflow: hidden;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-xs);
}

.avatar-md {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-sm);
}

.avatar-lg {
    width: 56px;
    height: 56px;
    font-size: var(--font-size-lg);
}

.avatar-xl {
    width: 80px;
    height: 80px;
    font-size: var(--font-size-2xl);
}

/* =====================================================
   Component - Progress Bar
   ===================================================== */
.progress {
    width: 100%;
    height: 8px;
    background-color: var(--gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.progress-value {
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
}

/* =====================================================
   Component - Tooltip
   ===================================================== */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-content {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--space-xs) var(--space-sm);
    background-color: var(--secondary);
    color: var(--white);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: var(--z-tooltip);
}

.tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--secondary);
}

.tooltip:hover .tooltip-content {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

/* =====================================================
   Component - Loading Spinner
   ===================================================== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 4px;
}

.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
}

[data-theme="dark"] .spinner-overlay {
    background-color: rgba(0, 0, 0, 0.8);
}

/* =====================================================
   Component - Skeleton Loading
   ===================================================== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--gray-200) 25%,
        var(--gray-100) 50%,
        var(--gray-200) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    margin-bottom: var(--space-sm);
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: var(--space-md);
}

.skeleton-image {
    height: 200px;
    margin-bottom: var(--space-md);
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
}

/* =====================================================
   Component - Divider
   ===================================================== */
.divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--space-xl) 0;
}

.divider-text {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.divider-text::before,
.divider-text::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-color);
}

/* =====================================================
   Component - Dropdown Menu
   ===================================================== */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    padding: var(--space-sm);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition);
    z-index: var(--z-dropdown);
}

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

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    cursor: pointer;
}

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

[data-theme="dark"] .dropdown-item:hover {
    background-color: var(--gray-700);
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: var(--space-sm) 0;
}

/* =====================================================
   Animations - Transitions
   ===================================================== */
.transition-all {
    transition: all var(--transition);
}

.transition-colors {
    transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.transition-transform {
    transition: transform var(--transition);
}

.transition-opacity {
    transition: opacity var(--transition);
}

.transition-shadow {
    transition: box-shadow var(--transition);
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.animate-slide-up {
    animation: slideUp 0.5s ease forwards;
}

.animate-slide-down {
    animation: slideDown 0.5s ease forwards;
}

.animate-slide-left {
    animation: slideLeft 0.5s ease forwards;
}

.animate-slide-right {
    animation: slideRight 0.5s ease forwards;
}

.animate-scale-in {
    animation: scaleIn 0.3s ease forwards;
}

.animate-bounce {
    animation: bounce 1s ease infinite;
}

.animate-pulse {
    animation: pulse 2s ease infinite;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

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

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

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

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

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Animation Delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* =====================================================
   Responsive Utilities
   ===================================================== */
@media (max-width: 1200px) {
    .container {
        max-width: var(--container-lg);
    }
}

@media (max-width: 992px) {
    .container {
        max-width: var(--container-md);
    }

    .hide-tablet {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: var(--container-sm);
    }

    .hide-mobile {
        display: none !important;
    }

    .grid-cols-1-tablet {
        grid-template-columns: repeat(1, minmax(0, 1fr));
    }

    .flex-col-tablet {
        flex-direction: column;
    }

    .text-center-tablet {
        text-align: center;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .hide-small {
        display: none !important;
    }

    .grid-cols-1-mobile {
        grid-template-columns: repeat(1, minmax(0, 1fr));
    }

    .flex-col-mobile {
        flex-direction: column;
    }

    .text-center-mobile {
        text-align: center;
    }
}

/* =====================================================
   Accessibility
   ===================================================== */
.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;
}

.focus-visible:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--primary);
    color: var(--white);
    z-index: 100;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 0;
}

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

/* =====================================================
   Print Styles
   ===================================================== */
@media print {
    .no-print {
        display: none !important;
    }

    body {
        background-color: white;
        color: black;
    }

    a {
        text-decoration: underline;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* =====================================================
   RTL Support (Arabic)
   ===================================================== */
[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

[dir="rtl"] .mr-auto {
    margin-left: auto;
    margin-right: 0;
}

[dir="rtl"] .ml-auto {
    margin-right: auto;
    margin-left: 0;
}

[dir="rtl"] .text-right {
    text-align: left;
}

[dir="rtl"] .text-left {
    text-align: right;
}

[dir="rtl"] .nav-link::after {
    left: auto;
    right: 0;
}

[dir="rtl"] .category-link:hover i {
    transform: rotate(180deg);
}

[dir="rtl"] .course-link:hover i {
    transform: rotate(180deg);
}

[dir="rtl"] .card-link:hover i {
    transform: rotate(180deg);
}

[dir="rtl"] .footer-links a:hover {
    padding-right: 0;
    padding-left: var(--space-sm);
}

/* =====================================================
   Custom Scrollbar
   ===================================================== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--gray-800);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--gray-600);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* Firefox Scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--gray-300) var(--gray-100);
}

[data-theme="dark"] * {
    scrollbar-color: var(--gray-600) var(--gray-800);
}

/* =====================================================
   Selection
   ===================================================== */
::selection {
    background-color: var(--primary);
    color: var(--white);
}

[data-theme="dark"] ::selection {
    background-color: var(--primary-light);
}

/* =====================================================
   Focus Within
   ===================================================== */
:focus-within {
    outline: none;
}

/* =====================================================
   Ad Container Styles
   ===================================================== */
.ad-container {
    width: 100%;
    display: block;
    margin: 1.5rem 0;
    min-height: 100px;
    overflow: hidden;
}

.ad-placeholder {
    width: 100%;
    height: 150px;
    max-height: 180px;
    background: var(--gray-100);
    display: block;
    border-radius: var(--radius);
    border: 1px dashed var(--gray-300);
    opacity: 0.5;
}

[data-theme="dark"] .ad-placeholder {
    background: var(--bg-card);
    border-color: var(--gray-600);
}

@media (min-width: 800px) {
    .ad-placeholder {
        height: 90px;
        max-height: 100px;
    }
}

@media (max-width: 360px) {
    .ad-container {
        margin: 0.5rem 0;
    }
    .ad-placeholder {
        height: 100px;
    }
}

header .ad-container,
nav .ad-container {
    display: none !important;
}

/* =====================================================
   Language and Theme Toggle Buttons
   ===================================================== */
.theme-toggle,
.lang-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.theme-toggle:hover,
.lang-toggle:hover {
    background-color: var(--gray-100);
    color: var(--text-primary);
    border-color: var(--primary);
}

[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .lang-toggle:hover {
    background-color: var(--gray-700);
}

.theme-toggle i,
.lang-toggle i {
    font-size: var(--font-size-lg);
}

/* =====================================================
   Mobile Menu
   ===================================================== */
.mobile-menu {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    cursor: pointer;
}

@media (max-width: 992px) {
    .mobile-menu {
        display: flex;
    }
}

.mobile-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-card);
    padding: var(--space-lg);
    transform: translateX(-100%);
    transition: transform var(--transition);
    z-index: var(--z-fixed);
    overflow-y: auto;
}

.mobile-nav.active {
    transform: translateX(0);
}

.mobile-nav a {
    display: block;
    padding: var(--space-md) 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition);
}

.mobile-nav a:hover {
    color: var(--primary);
    padding-right: var(--space-sm);
}

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

/* =====================================================
   Article Content Styles
   ===================================================== */
.article-content {
    max-width: 800px;
    margin: 0 auto;
}

.article-content h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-lg);
}

.article-content h2 {
    font-size: var(--font-size-3xl);
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-lg);
}

.article-content h3 {
    font-size: var(--font-size-2xl);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
}

.article-content h4 {
    font-size: var(--font-size-xl);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-sm);
}

.article-content p {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
    margin-bottom: var(--space-lg);
    padding-right: var(--space-xl);
}

.article-content li {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

.article-content ul li {
    list-style-type: disc;
}

.article-content ol li {
    list-style-type: decimal;
}

.article-content blockquote {
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    border-right: 4px solid var(--primary);
    background-color: var(--gray-50);
    border-radius: var(--radius);
    font-style: italic;
}

[data-theme="dark"] .article-content blockquote {
    background-color: var(--gray-800);
}

.article-content code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
    padding: 2px 6px;
    background-color: var(--gray-100);
    border-radius: var(--radius-sm);
}

[data-theme="dark"] .article-content code {
    background-color: var(--gray-700);
}

.article-content pre {
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    background-color: var(--gray-900);
    border-radius: var(--radius);
    overflow-x: auto;
}

.article-content pre code {
    padding: 0;
    background: none;
    color: var(--gray-100);
    font-size: var(--font-size-sm);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    margin: var(--space-xl) 0;
}

.article-content a {
    color: var(--primary);
    text-decoration: underline;
}

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

/* =====================================================
   Table Styles
   ===================================================== */
.table-container {
    overflow-x: auto;
    margin: var(--space-xl) 0;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: var(--space-md);
    text-align: right;
    border-bottom: 1px solid var(--border-color);
}

[dir="ltr"] .table th,
[dir="ltr"] .table td {
    text-align: left;
}

.table th {
    font-weight: var(--font-weight-semibold);
    background-color: var(--gray-50);
}

[data-theme="dark"] .table th {
    background-color: var(--gray-800);
}

.table tr:hover td {
    background-color: var(--gray-50);
}

[data-theme="dark"] .table tr:hover td {
    background-color: var(--gray-800);
}

/* =====================================================
   Utility Classes - Quick Helpers
   ===================================================== */
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.aspect-video {
    aspect-ratio: 16 / 9;
}

.aspect-square {
    aspect-ratio: 1 / 1;
}

.aspect-portrait {
    aspect-ratio: 3 / 4;
}

.object-cover {
    object-fit: cover;
}

.object-contain {
    object-fit: contain;
}

.center-content {
    display: flex;
    align-items: center;
    justify-content: center;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hover-lift {
    transition: transform var(--transition);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

.hover-scale {
    transition: transform var(--transition);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.group:hover .group-hover-show {
    opacity: 1;
    visibility: visible;
}

.group-hover-show {
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}