```log
====================[ LOG SAMPLE ]====================
2025-08-08 15:32:55 [INFO] Server started at http://localhost:8080
2025-08-08 15:33:10 [ERROR] syntax error at line 23
2025-08-08 15:33:12 [WARN] Deprecated API usage
192.168.1.10 GET /index.html 200
8.8.8.8 GET /malicious.php?id=19 404
172.20.0.5 POST /api/data 500
http://example.com?param=1234567890123456789012345678901234567890

Zero width test: Test​Zero​Width
Invisible chars: test‎abc‏xyz

====================[ HTML SAMPLE ]====================
<div class="container">
    <h1>Title</h1>
    <div class="content">
        <p>Paragraph <b>bold</b> text.</p>
        <div class="nested">
            <span class="active">Active span</span>
        </div>
    </div>
</div>

<a href="https://example.com" class="btn active">Click here</a>
<a href="http://oldsite.com">Old link</a>

====================[ JSON SAMPLE ]====================
{
    "user": {
        "id": 123,
        "name": "Nguyen Van A",
        "roles": ["admin", "editor"],
        "profile": {
            "age": 30,
            "address": {
                "street": "123 Le Loi",
                "city": "Ho Chi Minh"
            }
        }
    }
}

====================[ CODE SAMPLE ]====================
//BEGIN
function calculate(a, b) {
    return (a + b) * (a - b);
}
//END

/* Multi-line
   comment */
const apiUrl = "https://api.example.com/data";
let phone = "0912345678";
let email = "test.email@example.com";
let base64 = "U29tZSBiYXNlNjQgc3RyaW5nIGRhdGE=";

//BEGIN
if (user.isAdmin()) {
    console.log("Welcome Admin");
}
//END

====================[ TEXT BẨN & ĐẶC BIỆT ]====================
ThisIsASuperLongWordWithMoreThanFifteenCharacters
0123456789abcdef0123456789abcdef
Random Vietnamese: Tiếng Việt có dấu
Price: 1.200.000đ
Price: 2000000VNĐ
MAC: AA:BB:CC:DD:EE:FF
Windows path: C:\Program Files\Notepad++
Linux path: /usr/local/bin/notepad++
```