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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 900px;
    width: 100%;
    padding: 60px 40px;
    animation: fadeIn 0.8s ease-in;
}

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

header {
    text-align: center;
    margin-bottom: 50px;
}

header h1 {
    font-size: 3em;
    color: #667eea;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2em;
    color: #666;
}

.hero {
    text-align: center;
    margin-bottom: 50px;
    padding: 30px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
}

.hero h2 {
    font-size: 2.5em;
    color: #333;
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.1em;
    color: #555;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.feature-card {
    padding: 30px;
    background: #f8f9fa;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.feature-card h3 {
    font-size: 1.8em;
    margin-bottom: 15px;
    color: #667eea;
}

.feature-card p {
    color: #666;
    font-size: 1em;
}

footer {
    text-align: center;
    color: #999;
    font-size: 0.9em;
    padding-top: 30px;
    border-top: 1px solid #eee;
}

@media (max-width: 768px) {
    .container {
        padding: 40px 20px;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    .hero h2 {
        font-size: 1.8em;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}