body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #0f1d13;
    color: #e0e0e0;
}
header {
    background: #071006;
    padding: 10px 20px;
    display: flex;
    align-items: center;
}
header img { height: 50px; }
nav {
    margin-left: auto;
}
nav a {
    color: #61e786;
    margin: 0 10px;
    text-decoration: none;
    font-weight: bold;
}
nav a:hover {
    text-decoration: underline;
}
main {
    text-align: center;
    padding: 60px 20px;
}
footer {
    text-align: center;
    padding: 20px;
    font-size: 0.9em;
    color: #7a7a7a;
}