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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

header {
    background: linear-gradient(135deg, #0066cc 0%, #003366 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
}

header h1 {
    font-size: 2.8rem;
    margin-bottom: 16px;
    font-weight: 700;
}

header p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    font-weight: 300;
}

.app-info {
    padding: 60px 0;
}

.app-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    display: flex;
    flex-wrap: wrap;
}

.app-details {
    flex: 1;
    padding: 40px;
    min-width: 300px;
}

.app-details h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

.app-details p {
    margin-bottom: 24px;
    color: #555;
    font-size: 1.1rem;
}

.feature-list {
    margin-top: 30px;
}

.feature-list h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.feature-list ul {
    list-style-type: none;
}

.feature-list li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.feature-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #0066cc;
    font-weight: bold;
}

.download-section {
    flex: 0 0 350px;
    background: #f8f9fa;
    padding: 40px;
    display: flex;
    flex-direction: column;
}

.version-info {
    margin-bottom: 30px;
}

.version-info p {
    margin-bottom: 10px;
    font-size: 1rem;
}

.download-btn {
    display: block;
    background: #0066cc;
    color: white;
    text-align: center;
    padding: 16px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 30px;
    transition: background 0.3s;
}

.download-btn:hover {
    background: #0052a3;
}

.instructions {
    margin-top: auto;
}

.instructions h3 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.instructions ol {
    padding-left: 20px;
}

.instructions li {
    margin-bottom: 8px;
}

.tech-stack {
    padding: 60px 0;
}

.tech-stack h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
    color: #2c3e50;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.tech-item {
    background: white;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.tech-item h4 {
    color: #0066cc;
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.tech-item p {
    color: #666;
}

footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 30px 0;
}

@media (max-width: 768px) {
    .app-card {
        flex-direction: column;
    }
    
    .download-section {
        flex: 1;
    }
    
    header h1 {
        font-size: 2.2rem;
    }
    
    header p {
        font-size: 1rem;
    }
}