/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background: linear-gradient(135deg, #fef7ed 0%, #ffffff 50%, #eff6ff 100%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand .icon {
    width: 2rem;
    height: 2rem;
    color: #ea580c;
}

.brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1f2937;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: #6b7280;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #ea580c;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: #1f2937;
    margin: 3px 0;
    transition: 0.3s;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid #e5e7eb;
    z-index: 999;
    padding: 1rem;
}

.mobile-nav-link {
    display: block;
    padding: 0.75rem 0;
    color: #6b7280;
    text-decoration: none;
    border-bottom: 1px solid #f3f4f6;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: #ea580c;
    color: white;
}

.btn-primary:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #ea580c;
    border: 2px solid #ea580c;
}

.btn-outline:hover {
    background: #ea580c;
    color: white;
}

.btn-white {
    background: white;
    color: #ea580c;
}

.btn-white:hover {
    background: #f9fafb;
}

.btn-outline-white {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-outline-white:hover {
    background: white;
    color: #ea580c;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-icon {
    width: 1.25rem;
    height: 1.25rem;
}

/* Hero Section */
.hero {
    padding: 8rem 1rem 5rem;
    text-align: center;
}

.hero-content {
    max-width: 4xl;
    margin: 0 auto;
}

.badge {
    display: inline-block;
    background: #fed7aa;
    color: #9a3412;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.highlight {
    color: #ea580c;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: #ea580c;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #6b7280;
}

/* Why Section */
.why-section {
    padding: 5rem 1rem;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: #6b7280;
    max-width: 800px;
    margin: 0 auto;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.card-icon {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.card-icon svg {
    width: 2rem;
    height: 2rem;
}

.card-icon.blue {
    background: #dbeafe;
    color: #2563eb;
}

.card-icon.green {
    background: #dcfce7;
    color: #16a34a;
}

.card-icon.purple {
    background: #f3e8ff;
    color: #9333ea;
}

.card-icon.orange {
    background: #fed7aa;
    color: #ea580c;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-description {
    color: #6b7280;
    font-size: 0.875rem;
}

/* Chapters Section */
.chapters-section {
    padding: 5rem 1rem;
    background: #f9fafb;
}

.chapters-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 4xl;
    margin: 0 auto;
}

.chapter-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.chapter-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.chapter-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1rem;
    gap: 1rem;
}

.chapter-title {
    font-size: 1.25rem;
    font-weight: 600;
    flex: 1;
}

.chapter-badge {
    background: #f3f4f6;
    color: #6b7280;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
}

.chapter-description {
    color: #6b7280;
    margin-bottom: 1rem;
}

.chapter-excerpt {
    color: #6b7280;
    font-style: italic;
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 3px solid #ea580c;
}

/* CTA Section */
.cta-section {
    padding: 5rem 1rem;
    background: linear-gradient(135deg, #ea580c 0%, #dc2626 100%);
    color: white;
    text-align: center;
}

.cta-content {
    max-width: 4xl;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.cta-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.rating {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.stars {
    display: flex;
    gap: 0.25rem;
}

.star {
    color: #fbbf24;
    font-size: 1.25rem;
}

.rating-text {
    font-size: 1.125rem;
}

/* Footer */
.footer {
    background: #111827;
    color: white;
    padding: 3rem 1rem;
    text-align: center;
}

.footer-content {
    max-width: 4xl;
    margin: 0 auto;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.footer-icon {
    width: 2rem;
    height: 2rem;
    color: #ea580c;
}

.footer-brand-text {
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-description {
    color: #9ca3af;
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-link {
    color: #9ca3af;
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: white;
}

.footer-copyright {
    padding-top: 1.5rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
    font-size: 0.875rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 1rem;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: #6b7280;
}

.modal-close:hover {
    color: #1f2937;
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: 60vh;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .chapter-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .rating {
        flex-direction: column;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 6rem 1rem 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
}