body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    color: #333;
}

.section {
    margin-bottom: 20px;
}

textarea {
    width: 97%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: vertical;
}

.mask {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.mask input, .mask select {
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    flex: 1;
}

.options {
    margin-top: 10px;
}

.options label {
    margin-right: 20px;
}

button {
    padding: 8px 16px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

.remove-mask {
    background-color: #dc3545;
}

.remove-mask:hover {
    background-color: #c82333;
}

textarea[readonly] {
    background-color: #f8f8f8;
}