/* Reset + base */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: #333;
    background-color: #f7f7f7;
}

a {
    color: #0077cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

header {
    background-color: #1e2a38;
    color: white;
    padding: 2rem 1rem;
    text-align: center;
}

header h1 {
    margin-bottom: 0.5rem;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

nav a {
    color: #ffffff;
    font-weight: bold;
}

section {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
    background-color: #fff;
    border-radius: 0.5rem;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
    padding: 2rem;
}

section h2 {
    color: #1e2a38;
    margin-top: 0;
}

ul {
    padding-left: 1.2rem;
}

article {
    margin-top: 2rem;
}

article h3 {
    color: #0077cc;
    margin-bottom: 0.5rem;
}

footer {
    background-color: #1e2a38;
    color: #ccc;
    text-align: center;
    padding: 1rem;
    margin-top: 4rem;
    font-size: 0.9rem;
}

@media screen and (max-width: 600px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    section {
        padding: 1.2rem;
    }
}