body {
    background-color: #121212;
    color: white;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.light-theme {
    background-color: white;
    color: black;
}

header, nav {
    background-color: #1f1f1f;
    padding: 15px;
    text-align: center;
}

nav a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

.container {
    padding: 20px;
    max-width: 900px;
    margin: auto;
}

button {
    padding: 10px 20px;
    margin-top: 20px;
    cursor: pointer;
}

.footer {
    margin-top: 40px;
    padding: 25px;
    text-align: center;
    border-top: 1px solid gray;
    opacity: 0.95;
}

.footer-info p {
    margin: 5px 0 10px 0;
    font-size: 0.95em;
}

.footer-copy {
    margin-top: 10px;
    font-size: 0.85em;
}


.flag-pl {
    width: 70px;
    height: 45px;
    margin: 15px auto;
    border: 1px solid black;
}

.flag-white {
    width: 100%;
    height: 50%;
    background: white;
}

.flag-red {
    width: 100%;
    height: 50%;
    background: red;
}

.light-theme .footer {
    border-top: 1px solid #444;
}

.light-theme .flag-pl {
    border: 1px solid #222;
}