body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f8fb;
    color: #1f2933;
}

header {
    background-color: #2e5b88;
    color: white;
    padding: 24px;
    text-align: center;
}

nav {
    margin-top: 12px;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 12px;
    font-weight: bold;
}

main {
    padding: 40px 20px;
    max-width: 900px;
    margin: 0 auto;
}

section {
    background-color: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

section+section {
    margin-top: 24px;
}

ul {
    padding-left: 20px;
    line-height: 1.8;
}