Headers with a short title and implicit ref. Last 3 headers are unnumbered.

# unremarkable header 1
## unremarkable header 2
### unremarkable header 3
### unremarkable header 3
## unremarkable header 2 {.unnumbered}
### unremarkable header 3 {.unnumbered}
### unremarkable header 3 {.unnumbered}

---

Headers with various inline elements

# **bold** *italic* [underline]{.underline} ~strikethrough~ {#short11}
## superscript^2^ subscript~3~ {#short21}
### [smallcaps]{.smallcaps} `code` $inline math$ $$display math$$ {#short31}
### [link](example.com) ![image](https://duckduckgo.com/favicon.ico) {#short32}

---

Headers with a long name and explicit short ref

# Long header 1 long header 1 long header 1 long header 1 long header 1 long header 1 long header 1 {#long1}
## Long header 2 long header 2 long header 2 long header 2 long header 2 long header 2 long header 2 {#long21}
### Long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 {#long31}
### Long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 {#long32}
## Long header 2 long header 2 long header 2 long header 2 long header 2 long header 2 long header 2 {#long22}
### Long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 {#long33}
### Long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 {#long34}

---

Headers with a long name and implicit ref.

Since implicit ref is very lengthy, there is no way to fit it. Therefore title
is not rendered and the references exceed the columns (textwidth) limit

# Long header 1 long header 1 long header 1 long header 1 long header 1 long header 1 long header 1
## Long header 2 long header 2 long header 2 long header 2 long header 2 long header 2 long header 2
### Long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 long header 3
### Long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 long header 3
## Long header 2 long header 2 long header 2 long header 2 long header 2 long header 2 long header 2
### Long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 long header 3
### Long header 3 long header 3 long header 3 long header 3 long header 3 long header 3 long header 3
