:root {
    --primary-color: #000000;
    --secondary-color: #666666;
    --bg-color: #FFFFFF;
    --text-primary: #000000;
    --text-secondary: #666666;
    --border-color: #E5E5E5;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header Styles */
.header {
    position: fixed;
    width: 100%;
    top: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 40px;
}

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

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

.btn-primary {
    display: inline-block;
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    padding: 160px 0 80px;
    position: relative;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
    max-width: 1000px;
}

.hero-content {
    flex: 1.2;
}

.hero-content h1 {
    font-size: 64px;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-content p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.store-buttons {
    display: flex;
    gap: 16px;
}

.store-button img {
    height: 48px;
    transition: var(--transition);
}

.store-button:hover img {
    transform: translateY(-2px);
}

.hero-image {
    flex: 0.8;
    position: relative;
}

.mockup {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: var(--radius-lg);
    margin-left: auto;
}

.hero-pattern {
    position: absolute;
    top: -20%;
    right: -20%;
    width: 80%;
    height: 80%;
    background: linear-gradient(45deg, #F3F4F6 25%, transparent 25%),
                linear-gradient(-45deg, #F3F4F6 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, #F3F4F6 75%),
                linear-gradient(-45deg, transparent 75%, #F3F4F6 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    z-index: -1;
}

/* Features Section */
.features {
    padding: 120px 0;
    background: #F9FAFB;
}

.features h2 {
    font-size: 48px;
    text-align: center;
    margin-bottom: 80px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

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

/* Testimonial Section */
.testimonial {
    padding: 120px 0;
    background: black;
    color: white;
}

.testimonial-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.testimonial-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 40px;
}

blockquote {
    font-size: 32px;
    line-height: 1.4;
    margin-bottom: 40px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.author-image {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.author-info h4 {
    font-size: 18px;
    margin-bottom: 4px;
}

.author-info p {
    color: #A3A3A3;
}

.testimonial-rating {
    color: #FCD34D;
    font-size: 24px;
}

/* CTA Section */
.cta {
    padding: 80px 0;
}

.cta-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.cta-text h2 {
    font-size: 32px;
    margin-bottom: 16px;
}

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

/* Download Section */
.download {
    padding: 120px 0;
    background: #F9FAFB;
}

.download .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.download-content {
    flex: 1;
}

.download-content h2 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 40px;
}

.download-image {
    flex: 1;
}

/* Footer */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
}

.copyright {
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 48px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 0 20px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .store-buttons {
        justify-content: center;
    }

    .cta-content {
        flex-direction: column;
        text-align: center;
    }

    .download .container {
        flex-direction: column;
        text-align: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .mockup {
        max-width: 300px;
        margin: 0 auto;
    }
    
    .hero-content {
        flex: 1;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 32px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}