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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

nav a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

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

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

.section {
    padding: 60px 20px;
}

.section h2 {
    font-size: 32px;
    margin-bottom: 30px;
    text-align: center;
    color: #333;
}

.app-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.app-icon {
    text-align: center;
}

.app-icon img {
    width: 200px;
    height: 200px;
    border-radius: 45px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    background-color: #e0e0e0;
    border: 2px solid #ddd;
}

.app-details h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #667eea;
}

.app-details p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: #555;
}

.features {
    background-color: #fff;
    padding: 40px 20px;
    border-radius: 10px;
    margin-top: 30px;
}

.features h4 {
    margin-bottom: 15px;
    color: #333;
}

.features ul {
    list-style-position: inside;
    color: #555;
    line-height: 2;
}

.features li:before {
    content: "✓ ";
    color: #667eea;
    font-weight: bold;
    margin-right: 10px;
}

.screenshots {
    background-color: #fff;
    padding: 60px 20px;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.screenshot {
    aspect-ratio: 9/16;
    background-color: #f0f0f0;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #ddd;
    font-size: 14px;
    color: #999;
    font-weight: 500;
    text-align: center;
    padding: 20px;
}

.developer {
    background-color: #fff;
    padding: 60px 20px;
}

.developer-info {
    background-color: #f5f5f5;
    padding: 30px;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.developer-info h3 {
    color: #667eea;
    margin-bottom: 15px;
}

.developer-info p {
    margin-bottom: 12px;
    color: #555;
}

.info-row {
    display: flex;
    margin-bottom: 12px;
}

.info-label {
    font-weight: bold;
    width: 150px;
    color: #333;
}

.info-value {
    flex: 1;
    color: #555;
    word-break: break-word;
}

footer {
    background-color: #333;
    color: white;
    padding: 40px 20px;
    text-align: center;
    margin-top: 60px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: #667eea;
    text-decoration: none;
    margin: 0 20px;
}

.footer-links a:hover {
    text-decoration: underline;
}

.footer-text {
    font-size: 14px;
    color: #999;
}

@media (max-width: 768px) {
    .app-info {
        grid-template-columns: 1fr;
    }

    nav ul {
        gap: 15px;
        font-size: 14px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .section h2 {
        font-size: 24px;
    }
}