body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    background-color: #f8f9fa;
    color: #212529;
}

header {
    background: #003366;
    color: white;
    padding: 2rem 0;
    text-align: center;
}

nav {
    background: #00509e;
}
nav ul {
    list-style: none;
    margin: 0;
    padding: 0.5rem 1rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}
nav ul li {
    margin: 0 1rem;
}
nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}
nav ul li a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1000px;
    margin: auto;
    padding: 1rem;
}

h2 {
    border-bottom: 2px solid #ced4da;
    padding-bottom: 0.3rem;
}

.grid {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.grid > div {
    flex: 1 1 45%;
}

footer {
    background: #dee2e6;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: #495057;
}