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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 40px 20px;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

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

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.header .subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.content {
    padding: 40px;
}

.content h2 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.4em;
}

.content > div {
    margin-bottom: 30px;
}

.content p {
    line-height: 1.7;
    margin-bottom: 10px;
}

.content ul, .content ol {
    margin-left: 25px;
    line-height: 1.8;
}

.content li {
    margin-bottom: 5px;
}

.content code {
    background: #f0f0f0;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.9em;
}

.content pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 0.9em;
    line-height: 1.5;
}

.content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    border-top: 1px solid #e0e0e0;
}

.footer a {
    color: #667eea;
    text-decoration: none;
}

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

@media (max-width: 600px) {
    body {
        padding: 20px 10px;
    }

    .header {
        padding: 30px 20px;
    }

    .header h1 {
        font-size: 2em;
    }

    .content {
        padding: 30px 20px;
    }
}