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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 3rem 1rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

main {
    flex: 1;
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

main p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.card h2 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card ul {
    list-style-position: inside;
    padding-left: 0.5rem;
}

.card li {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

footer {
    text-align: center;
    padding: 1.5rem;
    color: #999;
    font-size: 0.9rem;
    border-top: 1px solid #e0e0e0;
    margin-top: 2rem;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.8rem;
    }
    main {
        padding: 0 0.5rem;
    }
}