body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    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;
    margin-bottom: 20px;
}

#editor {
    width: 100%;
    height: 600px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.button-group {
    margin-bottom: 20px;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 10px;
}

button:hover {
    background-color: #45a049;
}

button.secondary {
    background-color: #008CBA;
}

button.secondary:hover {
    background-color: #007B9E;
}

#message {
    padding: 10px;
    margin-top: 10px;
    border-radius: 4px;
    display: none;
}

.success {
    background-color: #dff0d8;
    color: #3c763d;
    border: 1px solid #d6e9c6;
}

.error {
    background-color: #f2dede;
    color: #a94442;
    border: 1px solid #ebccd1;
}