/* ============================================
   TechLearn Academy - Design System
   Modern, vibrant, tech-forward aesthetic
   ============================================ */

/* CSS Variables - Acid Neon Palette */
:root {
    /* Primary Colors */
    --color-primary: #CCFF00;
    --color-primary-dark: #B8E600;
    --color-secondary: #FF3CAC;
    --color-secondary-dark: #E0359A;
    
    /* Background Colors */
    --color-bg: #0D0D0D;
    --color-bg-elevated: #1A1A2E;
    --color-bg-card: #16162A;
    --color-bg-hover: #252540;
    
    /* Text Colors */
    --color-text: #FFFFFF;
    --color-text-muted: #A0A0B0;
    --color-text-dim: #6B6B7B;
    
    /* Accent Colors */
    --color-accent-cyan: #00F5FF;
    --color-accent-purple: #8B5CF6;
    --color-accent-orange: #FF6B35;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #CCFF00 0%, #00F5FF 100%);
    --gradient-secondary: linear-gradient(135deg, #FF3CAC 0%, #784BA0 100%);
    --gradient-hero: linear-gradient(135deg, #1A1A2E 0%, #0D0D0D 100%);
    
    /* Typography */
    --font-display: 'Clash Display', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(204, 255, 0, 0.15);
    --shadow-glow-secondary: 0 0 40px rgba(255, 60, 172, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-bg);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(204, 255, 0, 0.3);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: var(--color-text);
    box-shadow: var(--shadow-glow-secondary);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 60, 172, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-text-dim);
}

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

.btn-outline-light {
    background: transparent;
    color: var(--color-text);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-text);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(13, 13, 13, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    color: var(--color-primary);
    font-size: 1.75rem;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

.nav-links a:hover {
    color: var(--color-text);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--space-3xl) + 60px) 0 var(--space-3xl);
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: var(--gradient-hero);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--color-secondary);
    bottom: -100px;
    left: -100px;
    animation: float 10s ease-in-out infinite reverse;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--color-accent-cyan);
    top: 50%;
    left: 30%;
    animation: float 12s ease-in-out infinite;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: rgba(204, 255, 0, 0.1);
    border: 1px solid rgba(204, 255, 0, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
    line-height: 1.1;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

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

.play-icon {
    font-size: 0.75rem;
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Hero Visual - Code Window */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.code-window {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    width: 100%;
    max-width: 480px;
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: var(--transition-slow);
}

.code-window:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.window-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.window-dots {
    display: flex;
    gap: 6px;
}

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

.dot.red { background: #FF5F56; }
.dot.yellow { background: #FFBD2E; }
.dot.green { background: #27C93F; }

.window-title {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    margin-left: auto;
}

.window-content {
    padding: var(--space-md);
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    line-height: 1.8;
}

.window-content pre {
    margin: 0;
    overflow-x: auto;
}

.code-keyword { color: #FF7ED8; }
.code-variable { color: #79E5F5; }
.code-function { color: #CCFF00; }
.code-string { color: #A5D6A7; }
.code-number { color: #FF8E53; }
.code-property { color: #9CDCFE; }
.code-comment { color: #6B6B7B; font-style: italic; }

/* Floating Cards */
.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    animation: float-card 6s ease-in-out infinite;
}

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

.card-2 {
    bottom: 20%;
    left: -30px;
    animation-delay: -3s;
}

@keyframes float-card {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.card-icon {
    font-size: 1.25rem;
}

.card-text {
    font-weight: 600;
    font-size: 0.9rem;
}

/* ============================================
   Section Headers
   ============================================ */

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-3xl);
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(204, 255, 0, 0.1);
    border: 1px solid rgba(204, 255, 0, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

/* ============================================
   Courses Section
   ============================================ */

.courses {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-elevated);
}

.course-categories {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.category-btn {
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--color-text-muted);
    font-family: var(--font-body);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
}

.category-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.category-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-bg);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.course-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(204, 255, 0, 0.2);
}

.course-image {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.course-badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    padding: 4px 12px;
    background: var(--color-secondary);
    color: var(--color-text);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
}

.course-icon {
    font-size: 4rem;
    opacity: 0.9;
}

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

.course-category {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.course-title {
    font-size: 1.25rem;
    margin: var(--space-xs) 0 var(--space-sm);
}

.course-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.course-meta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text-dim);
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.course-rating {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.stars {
    color: #FFD700;
    font-size: 0.9rem;
}

.rating-count {
    color: var(--color-text-dim);
    font-size: 0.8rem;
}

.course-price {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.courses-cta {
    text-align: center;
}

/* ============================================
   Features Section
   ============================================ */

.features {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.feature-card {
    padding: var(--space-xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
}

.feature-card:hover {
    border-color: rgba(204, 255, 0, 0.2);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(204, 255, 0, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.feature-desc {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ============================================
   Instructors Section
   ============================================ */

.instructors {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-elevated);
}

.instructors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-xl);
}

.instructor-card {
    text-align: center;
    padding: var(--space-xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
}

.instructor-card:hover {
    transform: translateY(-8px);
    border-color: rgba(204, 255, 0, 0.2);
}

.instructor-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 auto var(--space-md);
    border: 3px solid rgba(255, 255, 255, 0.1);
}

.instructor-name {
    font-size: 1.25rem;
    margin-bottom: 4px;
}

.instructor-role {
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.instructor-bio {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.instructor-social {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
}

.instructor-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    color: var(--color-text-muted);
    font-weight: 600;
    transition: var(--transition-fast);
}

.instructor-social a:hover {
    background: var(--color-primary);
    color: var(--color-bg);
}

/* ============================================
   Testimonials Section
   ============================================ */

.testimonials {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.testimonial-card {
    padding: var(--space-xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
}

.testimonial-card:hover {
    border-color: rgba(204, 255, 0, 0.2);
}

.testimonial-stars {
    color: #FFD700;
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    letter-spacing: 2px;
}

.testimonial-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
}

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

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-text);
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    color: var(--color-text);
}

.author-role {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
    padding: var(--space-3xl) 0;
    background: var(--gradient-secondary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.cta-content {
    position: relative;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-md);
}

.cta-subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--space-xl);
}

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

.cta-trust {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    background: var(--color-bg-elevated);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-brand .logo {
    margin-bottom: var(--space-md);
}

.footer-desc {
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    max-width: 300px;
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    color: var(--color-text-muted);
    font-weight: 600;
    transition: var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: var(--color-bg);
}

.footer-links h4 {
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--color-text-dim);
    font-size: 0.9rem;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        order: -1;
        margin-bottom: var(--space-xl);
    }
    
    .code-window {
        max-width: 400px;
    }
    
    .floating-card {
        display: none;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .course-categories {
        flex-wrap: wrap;
    }
    
    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .instructors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-desc {
        max-width: 100%;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .cta-trust {
        flex-direction: column;
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .instructors-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-lg {
        width: 100%;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
}