* {
    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;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

main {
    width: 100%;
}

.container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    padding: 40px;
    max-width: 600px;
    margin: 0 auto;
}

h1 {
    color: #667eea;
    font-size: 2.5em;
    margin-bottom: 10px;
}

h2 {
    color: #764ba2;
    font-size: 1.5em;
    margin: 30px 0 15px 0;
    border-bottom: 2px solid #667eea;
    padding-bottom: 10px;
}

p {
    margin-bottom: 20px;
    font-size: 1.1em;
}

section {
    margin: 30px 0;
}

ul {
    list-style-position: inside;
    margin: 15px 0;
}

li {
    margin: 10px 0;
    padding-left: 20px;
}

code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    color: #d63384;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2em;
    }

    h2 {
        font-size: 1.2em;
    }
}