:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
    --success: #10b981;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border: #2a2a3a;
    --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

/* Light Mode */
body.light-mode {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'DM Sans', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    padding-top: 70px;
}

/* Translucent blue background effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(16, 185, 129, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 15px 0;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    height: 70px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.1);
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s;
    margin-right: 15px;
}

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

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Buttons */
.btn-primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 15px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 15px;
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

/* Hero Section */
.hero {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 60px 20px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: #06b6d4;
    top: 5%;
    left: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: #6366f1;
    top: 50%;
    right: -10%;
    animation-delay: -5s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: #10b981;
    bottom: 10%;
    left: 30%;
    animation-delay: -10s;
}

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

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-block;
    background: rgba(6, 182, 212, 0.2);
    color: #22d3ee;
    padding: 10px 20px;
    border-radius: 25px;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 25px;
    border: 1px solid rgba(6, 182, 212, 0.3);
}

.hero h1 {
    font-size: clamp(48px, 10vw, 84px);
    line-height: 1.1;
    margin-bottom: 30px;
}

.hero-subtitle {
    font-size: 22px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.badge {
    display: inline-block;
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(40px, 8vw, 72px);
    line-height: 1.1;
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
    color: var(--accent-secondary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: clamp(28px, 5vw, 42px);
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 18px;
}

/* How It Works */
.how-it-works {
    padding: 100px 20px;
    background: var(--bg-secondary);
}

.steps-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.step-card {
    background: var(--bg-tertiary);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.step-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-primary);
}

.step-number {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 48px;
    font-weight: 800;
    color: var(--border);
    font-family: 'Outfit', sans-serif;
}

.step-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.step-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* Course Overview */
.course-overview {
    padding: 100px 20px;
}

.days-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.day-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    gap: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.day-card:hover {
    transform: translateX(10px);
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.day-number {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    flex-shrink: 0;
}

.day-content h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.day-content p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 12px;
}

.day-status {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.day-status.free {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.day-status.premium {
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent-secondary);
}

/* Testimonials */
.testimonials {
    padding: 100px 20px;
    background: var(--bg-secondary);
}

.testimonials-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: var(--bg-tertiary);
    padding: 30px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.testimonial-stars {
    color: #fbbf24;
    font-size: 20px;
    margin-bottom: 16px;
}

.testimonial-card p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
}

.author-name {
    display: block;
    font-weight: 600;
}

.author-location {
    color: var(--text-muted);
    font-size: 14px;
}

/* Pricing */
.pricing {
    padding: 100px 20px;
}

.pricing-grid {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.pricing-card {
    background: var(--bg-secondary);
    border-radius: 24px;
    padding: 40px;
    position: relative;
    border: 2px solid var(--border);
    transition: all 0.3s ease;
}

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

.pricing-card.premium {
    border-color: var(--accent-primary);
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.1) 0%, var(--bg-secondary) 100%);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gradient);
    color: white;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
}

.pricing-header h3 {
    font-size: 24px;
    margin-bottom: 8px;
}

.pricing-header p {
    color: var(--text-secondary);
}

.pricing-price {
    text-align: center;
    margin-bottom: 30px;
}

.price {
    font-size: 56px;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
}

.price-period {
    color: var(--text-secondary);
    font-size: 16px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

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

.pricing-card .btn-primary {
    width: 100%;
    justify-content: center;
}

.paypal-container {
    margin-bottom: 16px;
}

#paypal-button-container {
    min-height: 45px;
}

.guarantee {
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* CTA Section */
.cta-section {
    padding: 100px 20px;
    background: var(--bg-secondary);
    text-align: center;
}

.cta-section h2 {
    font-size: clamp(28px, 5vw, 42px);
    margin-bottom: 16px;
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 40px;
}

/* Footer */
.footer {
    padding: 60px 20px 30px;
    border-top: 1px solid var(--border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.footer-logo {
    text-align: center;
}

.footer-logo img {
    height: 60px;
    margin-bottom: 10px;
}

.footer-logo p {
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-copy p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .days-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-content, .section-header, .step-card, .day-card, .testimonial-card, .pricing-card {
    animation: fadeIn 0.6s ease forwards;
}

.step-card:nth-child(1) { animation-delay: 0.1s; }
.step-card:nth-child(2) { animation-delay: 0.2s; }
.step-card:nth-child(3) { animation-delay: 0.3s; }
.step-card:nth-child(4) { animation-delay: 0.4s; }

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

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 5px;
}

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

/* Days Container */
.days-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.day-row {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.day-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--bg-secondary);
    padding: 20px 25px;
    border-radius: 12px;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: all 0.3s ease;
}

.day-card:hover {
    border-color: var(--accent-primary);
    transform: translateX(10px);
}

.day-card.free {
    border-color: var(--success);
}

.day-card.free:hover {
    border-color: var(--success);
}

.day-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent-primary);
    width: 50px;
    text-align: center;
}

.day-card.free .day-num {
    color: var(--success);
}

.day-info {
    flex: 1;
}

.day-info h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.day-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

.day-badge {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent-secondary);
}

.day-card.free .day-badge {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

/* Price Tag */
.price-tag {
    font-size: 56px;
    font-weight: 800;
    color: var(--accent-primary);
    text-align: center;
    margin: 20px 0;
}

/* PayPal Box */
.paypal-box {
    text-align: center;
    margin: 20px 0;
}

.paypal-link {
    display: inline-block;
    background: #0070ba;
    color: white;
    padding: 16px 48px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    font-size: 18px;
    transition: background 0.3s;
}

.paypal-link:hover {
    background: #005ea6;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 0 20px;
}

.section-header h2 {
    font-size: clamp(24px, 5vw, 36px);
    margin-bottom: 10px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

/* Course Overview */
.course-overview {
    padding: 60px 0;
}

/* Pricing */
.pricing {
    padding: 60px 20px;
    background: var(--bg-secondary);
}

/* Footer */
.footer {
    padding: 30px 20px;
    text-align: center;
    color: var(--text-muted);
}

/* Mobile Responsive */
@media (max-width: 600px) {
    .day-card {
        flex-direction: column;
        text-align: center;
        padding: 15px;
    }
    
    .day-num {
        width: auto;
    }
    
    .paypal-link {
        padding: 14px 30px;
        font-size: 16px;
    }
}

/* Lesson Styles for E-commerce Course */
.main-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.lessons-container {
    max-width: 700px;
    margin: 0 auto;
}

.lesson-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    border: 1px solid var(--border);
    box-shadow: var(--card-shadow);
}

.lesson-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border);
}

.lesson-number {
    display: inline-block;
    background: var(--accent-primary);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 10px;
}

.lesson-header h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin: 0;
}

.lesson-content {
    padding: 0 5px;
}

.lesson-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.lesson-text p:first-child {
    color: var(--text-primary);
}

.lesson-example {
    background: var(--bg-tertiary);
    border-left: 4px solid var(--accent-primary);
    padding: 20px;
    margin: 25px 0;
    border-radius: 0 12px 12px 0;
}

.lesson-example h4 {
    color: var(--accent-primary);
    font-size: 14px;
    margin-bottom: 10px;
    font-weight: 600;
}

/* Vocabulary Box - for key terms */
.vocab-box {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 20px;
    margin: 25px 0;
}

.vocab-title {
    color: var(--success);
    font-weight: 600;
    margin-bottom: 15px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.vocab-item {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    font-size: 15px;
}

.vocab-term {
    color: #22d3ee;
    font-weight: 500;
    min-width: 140px;
    flex-shrink: 0;
}

.vocab-def {
    color: var(--text-secondary);
}

/* Steps/List items */
.lesson-step {
    display: flex;
    gap: 15px;
    margin: 20px 0;
    padding: 15px;
    background: var(--bg-tertiary);
    border-radius: 10px;
}

.step-number {
    background: var(--accent-primary);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
    font-size: 14px;
}

.step-content {
    flex: 1;
}

.step-content h4 {
    margin: 0 0 8px 0;
    color: var(--text-primary);
    font-size: 16px;
}

.step-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.lesson-example p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin: 0;
}

.lesson-warning {
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid #f59e0b;
    padding: 20px;
    margin: 25px 0;
    border-radius: 0 12px 12px 0;
}

.lesson-warning h4 {
    color: #f59e0b;
    font-size: 14px;
    margin-bottom: 10px;
    font-weight: 600;
}

.lesson-warning p {
    color: #fcd34d;
    font-size: 15px;
    line-height: 1.7;
    margin: 0;
}

.course-header {
    text-align: center;
    margin-bottom: 40px;
}

.course-badge {
    display: inline-block;
    background: var(--accent-primary);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 15px;
}

.course-header h1 {
    font-size: 28px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.course-description {
    color: var(--text-secondary);
    font-size: 16px;
}

.header-bar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 15px 0;
}

.progress-container {
    flex: 1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    margin: 0 20px;
}

.progress-bar {
    height: 100%;
    background: var(--accent-primary);
    border-radius: 3px;
    transition: width 0.3s;
}

.progress-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
}