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

header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
}

nav ul li {
    display: inline;
    margin: 0 10px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.editor-container {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.code-editor {
    width: 48%;
    position: relative;
}

textarea {
    width: 100%;
    height: 300px;
    padding: 10px;
    box-sizing: border-box;
    font-family: monospace;
    font-size: 14px;
}

.code-editor::before {
    content: attr(data-prefix);
    position: absolute;
    left: 10px;
    top: 10px;
    color: #aaa;
    font-family: monospace;
    font-size: 14px;
}

button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
    margin-bottom: 20px;
}

button:hover {
    background-color: #555;
}

.diff-output {
    white-space: pre-wrap;
    background-color: #f9f9f9;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ddd;
}

.diff-output .diff-section {
    margin-bottom: 10px;
    padding: 5px;
    background-color: #f1f1f1;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.diff-output .diff-insert {
    background-color: #d4ffd4;
}

.diff-output .diff-delete {
    background-color: #ffd4d4;
}
footer {
            text-align: center;
            padding: 1em 0;
            background: #f1f1f1;
            width: 100%;
        }