* {
    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: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    padding: 60px 40px;
    text-align: center;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    animation: fadeInDown 0.6s ease;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
    animation: fadeInUp 0.6s ease;
}

main {
    padding: 40px;
}

.card {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.card h2 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.card ul {
    list-style: none;
    padding-left: 0;
}

.card li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
}

.card li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

code {
    background: #e9ecef;
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #e83e8c;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.feature {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: scale(1.05);
}

.icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 10px;
}

.feature h3 {
    color: #667eea;
    margin-bottom: 8px;
}

.feature p {
    color: #6c757d;
    font-size: 0.9rem;
}

footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #6c757d;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 20px;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}