body {
    background-color: #050508;
    color: #e0e0e0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #1a1a2e;
}

nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 10px;
    background: #0a0a12;
}

nav a {
    color: #4da8da;
    text-decoration: none;
    font-weight: bold;
}

main {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
}

.cosmic-box {
    border: 1px solid #16213e;
    padding: 30px;
    border-radius: 15px;
    background: rgba(10, 10, 20, 0.5);
}

footer {
    text-align: center;
    font-size: 0.8em;
    color: #555;
    margin-top: 50px;
}