body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: #fff;
    color: #333;
    line-height: 1.6;
}
header {
    background: #131210;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
}
header img {
    height: 60px;
    max-width: 100%;
}
nav {
    background: #444;
    display: flex;
    flex-wrap: wrap;
    padding: 0.5rem 2rem;
}
nav a {
    color: #fff;
    text-decoration: none;
    margin-right: 1.5rem;
    font-weight: bold;
}
nav a:hover {
    text-decoration: underline;
}
main {
    padding: 2rem;
    max-width: 1000px;
    margin: auto;
}
footer {
    text-align: center;
    padding: 2rem;
    background: #f4f4f4;
    font-size: 0.9rem;
}
@media (max-width: 600px) {
    nav {
        flex-direction: column;
    }
    nav a {
        margin-bottom: 0.5rem;
    }
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    main {
        padding: 1rem;
    }
}