body {
    background-color: #1a202c;
    color: #cbd5e0;
    font-family: sans-serif;
    margin: 0;
}

a {
    color: #63b3ed;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.1rem;
    color: #a0aec0;
}

main .demo-box {
    background-color: #2d3748;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

footer {
    margin-top: 2rem;
    padding: 1rem 0;
    text-align: center;
    font-size: 0.9rem;
    color: #a0aec0;
}