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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

.header {
    padding: 20px 0;
    border-bottom: 1px solid #eee;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    width: 60px;
    height: 60px;
    border-radius: 12px;
}

.app-info h1 {
    font-size: 28px;
    font-weight: 600;
    color: #FFC107;
}

.app-info p {
    font-size: 14px;
    color: #666;
}

.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    padding: 60px 0;
    align-items: center;
}

.hero-content h2 {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #333;
}

.hero-content p {
    font-size: 18px;
    color: #666;
    margin-bottom: 40px;
    line-height: 1.8;
}

.download-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 15px 30px;
    font-size: 18px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-android {
    background-color: #3DDC84;
    color: #fff;
}

.btn-android:hover {
    background-color: #2ECC71;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(61, 220, 132, 0.3);
}

.btn-iphone {
    background-color: #000;
    color: #fff;
}

.btn-iphone:hover {
    background-color: #333;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.hero-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.features {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.features h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #333;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #FFC107;
}

.feature-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
}

.testimonials {
    padding: 60px 0;
}

.testimonials h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    color: #333;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border-left: 4px solid #FFC107;
}

.testimonial-card p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
    font-style: italic;
}

.testimonial-card .author {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    font-style: normal;
}

.cta {
    padding: 60px 0;
    background-color: #FFC107;
    text-align: center;
    color: #fff;
}

.cta h2 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 40px;
}

.cta .download-buttons {
    justify-content: center;
}

.footer {
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid #eee;
    color: #666;
    font-size: 14px;
}

.footer a {
    color: #666;
    text-decoration: none;
}

@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 40px 0;
        text-align: center;
    }

    .hero-content h2 {
        font-size: 28px;
    }

    .hero-content p {
        font-size: 16px;
    }

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

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

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

    .logo {
        justify-content: center;
    }

    .header {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .app-info h1 {
        font-size: 24px;
    }

    .hero-content h2 {
        font-size: 24px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 16px;
    }
}