body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
    text-align: center;
}

.description {
    text-align: center;
    color: #666;
    margin-bottom: 20px;
}

.usage {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: 4px;
    margin-top: 20px;
}

.error-message {
    text-align: center;
    color: #721c24;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    padding: 15px;
    border-radius: 4px;
    margin: 20px 0;
}

.back-link {
    text-align: center;
    margin-top: 20px;
}

.back-link a {
    color: #007bff;
    text-decoration: none;
}

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