body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #121212;
    color: #f0f0f0;
}

.container {
    text-align: center;
    background-color: #1e1e1e;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
    width: 80%;
    max-width: 800px;
    margin: 20px;
}

h1 {
    margin: 0 0 20px;
    font-size: 2em;
    color: #fff;
    padding-bottom: 10px;
    border-bottom: 1px solid #333;
}

.content {
    text-align: left;
}

.app-banner {
    width: 100%;
    max-width: 300px;
    margin: 20px 0;
    border-radius: 10px;
}

.links {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.back-link {
    display: block;
    margin-top: 20px;
    color: #007BFF;
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

/* Responsive Design für verschiedene Breakpoints */

/* Tablets und größere Smartphones im Hochformat */
@media (max-width: 768px) {
    .container {
        width: 90%;
        padding: 15px;
    }

    .app-banner {
        max-width: 200px;
    }
}

/* Kleine Smartphones */
@media (max-width: 480px) {
    .container {
        width: 95%;
        padding: 10px;
    }

    .app-banner {
        max-width: 150px;
    }
}

/* Große Bildschirme */
@media (min-width: 1200px) {
    .container {
        max-width: 1000px;
    }

    .app-banner {
        max-width: 400px;
    }
}