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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f4f4f4;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: #2c3e50;
    color: white;
    padding: 2rem;
    text-align: center;
}

header h1 {
    font-size: 2rem;
}

main {
    flex: 1;
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

section {
    margin-bottom: 2rem;
}

h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

h3 {
    color: #34495e;
    margin-bottom: 0.5rem;
}

ul {
    margin-left: 2rem;
    margin-top: 0.5rem;
}

li {
    margin-bottom: 0.5rem;
}

footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem;
}

@media (max-width: 768px) {
    main {
        margin: 1rem;
        padding: 1rem;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
}