body {
    background-color: #333;
    color: #ffffff;
    font-family: Arial, sans-serif;
    line-height: 1.6;
}
a {
    color: #1E90FF;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.container {
    max-width: 800px;
    margin: 50px auto;
    text-align: center;
    padding: 20px;
}
h1, h2, h3 {
    margin: 20px 0;
}
@media (max-width: 600px) {
    .container {
        margin: 20px;
        padding: 15px;
    }

    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.4rem; }
    h3 { font-size: 1.2rem; }
}