:root {
    --primary: #2d3748;
    --primary-dark: #1a202c;
    --secondary: #4a5568;
    --dark: #2d3748;
    --light: #ffffff;
    --gray: #718096;
    --light-gray: #e5e7eb;
    --accent: #3a86ff;
    --accent-light: #63b3ed;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background-color: var(--primary);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--light);
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--light);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--light);
}

/* Footer Styles */
footer {
    background-color: var(--primary-dark);
    color: white;
    padding: 3rem 0;
    margin-top: 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
}

.footer-logo img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.footer-links {
    flex: 1;
    min-width: 200px;
}

.footer-links h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

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

.footer-links a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--light-gray);
}

/* Back Button */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

/* Page Content Styles */
.page-content {
    background-color: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    margin: 2rem 0;
}

.page-content h2 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.page-content h3 {
    margin: 1.5rem 0 1rem;
    font-size: 1.5rem;
    color: var(--primary);
}

.page-content h4 {
    margin: 1.5rem 0 0.5rem;
    font-size: 1.2rem;
    color: var(--primary);
}

.page-content p, .page-content ul, .page-content ol {
    margin-bottom: 1rem;
}

.page-content ul, .page-content ol {
    margin-left: 1.5rem;
}

/* Home Page Styles */
.hero {
    padding: 5rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    background-color: var(--primary);
    color: var(--light);
}

.hero-content {
    flex: 1;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2), 0 10px 10px -5px rgba(0, 0, 0, 0.1);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: inherit;
}

.hero p {
    font-size: 1.2rem;
    color: var(--light-gray);
    margin-bottom: 2rem;
}

.download-btns {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--light);
    color: var(--primary);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, background-color 0.3s;
}

.download-btn:hover {
    transform: translateY(-3px);
    background-color: var(--light-gray);
}

.features {
    padding: 5rem 0;
    background-color: var(--light);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.section-title p {
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--light);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s;
    border: 1px solid var(--light-gray);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.feature-icon {
    background-color: var(--primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.feature-card p {
    color: var(--gray);
}

.languages-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.language-tag {
    background-color: var(--light-gray);
    color: var(--dark);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.how-it-works {
    padding: 5rem 0;
    background-color: #f7fafc;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    padding: 2rem;
    background-color: var(--light);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary);
    color: var(--light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-weight: 700;
}

.step h3 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.cta {
    padding: 5rem 0;
    text-align: center;
    background-color: var(--primary);
    color: white;
}

.cta h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.cta p {
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 1.2rem;
}

.cta-btn {
    display: inline-block;
    background-color: white;
    color: var(--primary);
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s;
}

.cta-btn:hover {
    transform: translateY(-3px);
}

/* Single Page Application Styles */
.page {
    display: none;
    padding: 3rem 0;
}

.page.active {
    display: block;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        flex-direction: column-reverse;
        text-align: center;
        padding: 3rem 0;
    }
    
    .download-btns {
        justify-content: center;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--primary);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        text-align: center;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .footer-content {
        flex-direction: column;
    }
}