body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f5f5f5;
}

header {
    background: #111;
    color: #fff;
    text-align: center;
    padding: 40px 20px;
}

h1 {
    margin: 0;
    font-size: 2.5rem;
}

.intro {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.intro h2 {
    margin-top: 0;
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    color: #555;
}