body {
    background-color: #0a1a2a;
    color: #e6f2ff;
    font-family: "Segoe UI", Arial, Helvetica, sans-serif;
    margin: 10px;
    line-height: 1.6;
}

h1 {
    text-align: center;
    margin-top: 10px;
}

nav {
    text-align: center;
    margin: 14px 0 24px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid #2a4a6a;
}

nav a {
    color: #9dd1ff;
    text-decoration: none;
    margin: 0 10px;
    font-weight: 600;
}

nav a:hover,
nav a:focus {
    color: #ffffff;
    text-decoration: underline;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 8px;
    border-top: 1px solid #2a4a6a;
    font-size: 0.95rem;
}

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 10px;
}

figure {
    margin: 18px auto;
    max-width: 820px;
}

figure img {
    width: 100%;
    height: auto;
    border: 2px solid #2a4a6a;
    border-radius: 6px;
}

figcaption {
    font-size: 0.95rem;
    color: #cfe8ff;
    text-align: center;
    margin-top: 6px;
}

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