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+# Sorbonne Presentation Theme
+
+A non-official structured presentation theme for **Sorbonne University**, built on top of the [presentate](https://typst.app/universe/package/presentate) and [navigator](https://typst.app/universe/package/navigator) packages.
+
+---
+
+## Overview
+
+The theme provides academic and institutional slide decks that respect the visual identity of Sorbonne University while offering powerful dynamic features.
+
+- **Faculty Presets**: Built-in colors and logos for Health, Science, Humanities, and University-wide presentations.
+- **Smart Navigation**: Automatic breadcrumbs, transition slides with roadmaps, and flexible hierarchy mapping.
+- **Dynamic Content**: Seamless integration of `pause`, `uncover`, and `only` for step-by-step reveals.
+- **Scientific Ready**: Specialized slides for equations, figures, and algorithms.
+
+### 🎨 Faculty Presets
+Switch visual identities instantly using the `faculty` parameter:
+
+| Univ | Sante | Sciences | Lettres |
+|:---:|:---:|:---:|:---:|
+| ![Univ](assets/docs/faculty-univ.png) | ![Sante](assets/docs/faculty-sante.png) | ![Sciences](assets/docs/faculty-sciences.png) | ![Lettres](assets/docs/faculty-lettres.png) |
+
+- `univ`: Sorbonne Blue (University-wide)
+- `sante`: Sorbonne Red (Faculty of Health)
+- `sciences`: Sorbonne Light Blue (Faculty of Science & Engineering)
+- `lettres`: Sorbonne Yellow/Ocre (Faculty of Humanities)
+
+## Documentation
+
+For a comprehensive visual tour of all components and features, please refer to the pre-compiled PDF documentation:
+
+- **[Main Demo Guide](examples/demo.typ)** (⇒ [pdf results](https://github.com/eusebe/typst-sorbonne-presentation/blob/0.1.0/examples/demo.pdf)): All components, boxes, and slide types.
+- **[2-Levels Mapping Guide](examples/demo-mapping-2levels.typ)** (⇒ [pdf results](https://github.com/eusebe/typst-sorbonne-presentation/blob/0.1.0/examples/demo-mapping-2levels.pdf)): Using Section/Subsection hierarchy.
+- **[3-Levels Mapping Guide](examples/demo-mapping-3levels.typ)** (⇒ [pdf results](https://github.com/eusebe/typst-sorbonne-presentation/blob/0.1.0/examples/demo-mapping-3levels.pdf)): Using Part/Section/Subsection hierarchy.
+
+## Quick Start
+
+```typ
+#import "@preview/sorbonne-presentation:0.1.0": *
+
+#show: template.with(
+  title: [Scientific Discovery],
+  author: [John Doe],
+  faculty: "sciences",
+  show-outline: true,
+)
+
+= Introduction
+#slide[
+  - High performance
+  - Intuitive syntax
+  #show: pause
+  - *Dynamic* animations
+]
+
+#ending-slide()
+```
+
+## Configuration Reference
+
+### The `template` function
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `title` | content | `none` | Main presentation title |
+| `short-title` | content | `none` | Short version of title for footer |
+| `subtitle` | content | `none` | Optional subtitle |
+| `author` | content | `none` | Presenter's name |
+| `short-author` | content | `none` | Short version of author for footer |
+| `affiliation` | content | `none` | Department or Laboratory |
+| `date` | content | `datetime...` | Custom date display |
+| `faculty` | string | `"sante"` | Preset: `"sante"`, `"sciences"`, `"lettres"`, `"univ"` |
+| `primary-color` | color | `none` | Manual override for theme color |
+| `alert-color` | color | `none` | Manual override for alert text color |
+| `logo-slide` | string | `none` | Path to custom logo for content slides |
+| `logo-transition` | string | `none` | Path to custom logo for transition slides |
+| `text-font` | string | `"Fira Sans"` | Main font family |
+| `text-size` | length | `20pt` | Base text size |
+| `aspect-ratio` | string | `"16-9"` | `"16-9"` or `"4-3"` |
+| `show-outline` | bool | `false` | Toggle summary slide |
+| `outline-title` | content | `[Sommaire]` | Title of the summary slide |
+| `outline-depth` | int | `2` | Levels shown in summary |
+| `outline-columns` | int | `1` | Number of columns for summary |
+| `mapping` | dict | `(sec: 1, sub: 2)` | Logic mapping for headings |
+| `auto-title` | bool | `true` | Use section name as slide title if none provided |
+| `show-header-numbering` | bool | `true` | Toggle all heading numbers |
+| `numbering-format` | string | `"1.1"` | Format for sections and subsections |
+| `part-numbering-format` | string | `"I"` | Format for parts |
+| `annex-title` | content | `[Annexe]` | Prefix for single appendix |
+| `annex-main-title` | content | `[Annexes]` | Focus slide text for appendix start |
+| `annex-numbering-format` | string | `"I"` | Numbering style for appendices |
+| `bib-style` | string | `"apa"` | Bibliography and citation style |
+| `progress-bar` | string | `"none"` | Position: `"none"`, `"top"`, or `"bottom"` |
+| `slide-break-suffix` | content | `[ (cont.)]` | Suffix appended to titles on broken slides |
+| `footer-author` | bool | `true` | Toggle author display in footer |
+| `footer-title` | bool | `true` | Toggle title display in footer |
+| `max-length` | int \| dict | `none` | Max length for breadcrumb titles before truncation |
+
+## Component Reference
+
+### Slide Types
+- `#slide(title: none, subtitle: none, allow-slide-breaks: false, background: none, body)`: Standard content slide.
+  - `allow-slide-breaks`: If `true`, allows content to overflow onto multiple slides. A suffix (defined by `slide-break-suffix`) is automatically appended to the title from the second page. *Note: This feature is incompatible with dynamic animations like `#pause`.*
+  - `background`: Optional content (e.g., an image) to display behind the slide content.
+  ![Slide](assets/docs/component-slide.png)
+- `#slide-break()`: Manually forces a page break within a slide. *Note: Only works when `allow-slide-breaks: true` is set on the `#slide()`.*
+- `#focus-slide(body, subtitle: none)`: Highlight slide on solid theme background.
+  ![Focus Slide](assets/docs/component-focus-slide.png)
+- `#figure-slide(fig, title: none, subtitle: none, caption: none, ..)`: Centered figure slide.
+  ![Figure Slide](assets/docs/component-figure-slide.png)
+- `#equation-slide(equation, title: none, subtitle: none, definitions: none, citation: none, ..)`: Large equation with "signature" citation.
+  ![Equation Slide](assets/docs/component-equation-slide.png)
+- `#acknowledgement-slide(title: none, subtitle: none, people: (), institutions: (), ..)`: Thank-you slide.
+  ![Acknowledgement Slide](assets/docs/component-acknowledgement-slide.png)
+- `#ending-slide(title: none, subtitle: none, contact: ())`: Closing slide with contact information.
+  ![Ending Slide](assets/docs/component-ending-slide.png)
+
+### Text Helpers
+- `#alert[text]`: Highlighted bold text.
+- `#muted[text]`: Gray secondary text.
+- `#subtle[text]`: Light gray tertiary text.
+
+![Text Helpers](assets/docs/helper-text.png)
+
+### Citations & References
+- Inline and corner citations.
+  `#cite-box("smith2023", position: "bottom-right")`
+  ![Citations](assets/docs/component-citation.png)
+
+### Layout & Boxes
+- `#two-col(left, right, columns: (1fr, 1fr), gutter: 2em)`: Balanced columns.
+  ![Layout 2-col](assets/docs/layout-2col.png)
+- `#three-col(left, center, right, ..)`: Three column layout.
+  ![Layout 3-col](assets/docs/layout-3col.png)
+- `#grid-2x2(tl, tr, bl, br, ..)`: Four-quadrant grid layout.
+  ![Layout Grid-2x2](assets/docs/layout-grid2x2.png)
+- **Boxes**: All boxes support the `fill-mode` parameter (`"outline"`, `"fill"`, `"full"`, or `"transparent"`).
+  ![Boxes](assets/docs/component-boxes.png)
+  - `#highlight-box(title, body)`: Blue university-styled box for key points.
+  - `#alert-box(title, body)`: Red cautionary box for warnings.
+  - `#example-box(title, body)`: Green academic box for examples.
+  - `#algorithm-box(title, body)`: Monospace box for algorithmic logic.
+  - `#themed-block(title, body)`: Box automatically matching the faculty color.
+
+## Credits
+
+- **Underlying Packages**: Built with [presentate](https://typst.app/universe/package/presentate) and [navigator](https://typst.app/universe/package/navigator).
+- **Inspiration**: Layout features and component designs were inspired by the [calmly-touying](https://typst.app/universe/package/calmly-touying) theme. A special thanks to its author for the high-quality design inspiration.
+
+## License
+
+MIT License. See [LICENSE](LICENSE) for details.
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+#import "@preview/sorbonne-presentation:0.1.0": *
+
+#show: template.with(
+  title: [Standard Mapping Guide],
+  subtitle: [Section & Subsection Hierarchy],
+  author: [David Hajage],
+  // Standard mapping: Level 1 (=) is a Section, Level 2 (==) is a Subsection
+  mapping: (section: 1, subsection: 2),
+  // Numbering format for sections and subsections
+  numbering-format: "1.1",
+  show-outline: true,
+)
+
+= Introduction
+== Description
+#slide[
+  In this configuration:
+  - Heading level 1 (`=`) acts as a *Section*.
+  - Heading level 2 (`==`) acts as a *Subsection*.
+]
+
+== Roadmap
+#slide[
+  Section transitions will display a "Roadmap" (mini table of contents) listing all the subsections within that section.
+
+  Subsections (Level 2) are displayed in the roadmap of the parent section transition slide.
+  
+  They also appear in the breadcrumb at the bottom of the slide.
+]
+
+= Technical Details
+
+== Implementation
+#slide(title: "The numbering-format option")[
+  The `numbering-format` parameter controls how sections and subsections are numbered.
+  
+  For example, `numbering-format: "1.1"` will produce:
+  - *1.* for the first section.
+  - *1.1* for the first subsection.
+]
+#slide[
+  You can change it to `"1.a"` or `"I.1"` depending on your preferences.
+]
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+#import "@preview/sorbonne-presentation:0.1.0": *
+
+#show: template.with(
+  title: [Complex Mapping Guide],
+  subtitle: [Part, Section & Subsection Hierarchy],
+  author: [David Hajage],
+  // Complex mapping: 3 levels of hierarchy
+  mapping: (part: 1, section: 2, subsection: 3),
+  // Numbering for the Part (Level 1)
+  part-numbering-format: "I",
+  // Numbering for Sections (Level 2) and Subsections (Level 3)
+  numbering-format: "1.a",
+  show-outline: true,
+)
+
+#slide[
+  When a level is mapped to `part`:
+  - The transition slide is centered and "quiet" (no roadmap).
+  - It usually represents a major thematic block.
+  - The numbering follows `part-numbering-format` (here: "I").
+]
+
+= First Part
+== Introduction Section
+=== Context
+#slide[
+  In this 3-level setup:
+  - Level 1 (`=`) is a *Part*.
+  - Level 2 (`==`) is a *Section*.
+  - Level 3 (`===`) is a *Subsection*.
+  
+  The Section transition (Level 2) will show a roadmap of all Subsections (Level 3) within it.
+]
+
+=== Problem Statement
+#slide[
+  Look at the breadcrumb: it now tracks three levels of depth.
+]
+
+= Second Part
+== Results Section
+=== Data Analysis
+#slide[
+  The `numbering-format` starts from the Section level. 
+  Here, `numbering-format: "1.a"` means sections are "1", "2", and subsections are "1.a", "1.b".
+]
diff --git a/packages/preview/sorbonne-presentation/0.1.0/examples/demo.typ b/packages/preview/sorbonne-presentation/0.1.0/examples/demo.typ
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+#import "@preview/sorbonne-presentation:0.1.0": *
+#import "@preview/physica:0.9.8": *
+
+#show: template.with(
+  title: [Sorbonne Template: Complete Guide],
+  subtitle: [Demonstration of all features and components],
+  author: [David Hajage],
+  affiliation: [Sorbonne University],
+  faculty: "univ",
+  show-outline: true,
+  mapping: (section: 1),
+)
+
+// ==========================================
+= Basic Components & Layout
+// ==========================================
+
+#slide(title: "Slides & Lists")[
+  The `#slide()` function is the core component. It supports standard Typst content.
+  
+  + First item
+  + Second item
+    - Sub-item
+]
+
+#slide(title: "Text Styles")[
+  Three functions to prioritize information:
+  
+  - *Alert*: For #alert[critical] information.
+  - *Muted*: For #muted[secondary] information.
+  - *Subtle*: For #subtle[tertiary] information.
+]
+
+#slide(title: "Multi-column Layouts", allow-slide-breaks: true)[
+  The template provides dedicated functions for balanced layouts:
+  
+  - `two-col(left, right, ..)` and `three-col(left, center, right, ..)`
+  - *Parameters*:
+    - `columns`: Array of widths (e.g., `(1fr, 2fr)`). Defaults to equal widths.
+    - `gutter`: Spacing between columns (default: `2em`).
+
+  #v(0.5em)
+  #two-col(
+    [*Two-col*: Default equal width. #lorem(5)],
+    [#lorem(10)]
+  )
+  #v(0.5em)
+  #two-col(
+    [*Custom width*: Using `columns: (1fr, 2fr)`.], [#lorem(10)],
+    columns: (1fr, 2fr)
+  )
+  #v(0.5em)
+  #three-col(
+    [*Three-col*], [Equal width], [distribution]
+  )
+  #v(0.5em)
+  #grid-2x2(
+    [*Grid-2x2*], [Top Right],
+    [Bottom Left], [Bottom Right]
+  )
+]
+
+#slide(title: "Automatic Page Breaks", allow-slide-breaks: true)[
+  When a slide contains too much content (like a long list or a bibliography), you can use `allow-slide-breaks: true`.
+  
+  - Content flows naturally to the next physical slide.
+  - Headers and footers are automatically repeated.
+  - A suffix (default: " (cont.)") is added to the title from the 2nd page.
+  
+  *Long List Example:*
+  #for i in range(1, 16) [
+    + Item number #i
+  ]
+]
+
+#slide(title: "Manual slide Breaks", allow-slide-breaks: true)[
+  You can also force a break manually using `#slide-break()`.
+  
+  - This is the first part of the slide.
+  - Useful for logically separating long content.
+  
+  #slide-break()
+  
+  - This is the second part, after a manual break.
+  - The title is automatically suffixed with "(cont.)".
+]
+
+#slide(subtitle: "Demonstrating auto-title with manual subtitle")[
+  This slide has no manual `title` parameter. 
+  
+  Because `auto-title` is `true` (default), it automatically uses the name of the current section ("Basic Components & Layout") as the title, while displaying the provided `subtitle` below it.
+]
+
+#slide(
+  title: "Slide with Background",
+  background: block(width: 100%, height: 100%, {
+    place(center + horizon, image("../assets/logo/sorbonne-univ.png", width: 40%))
+    place(top + left, rect(fill: white.transparentize(50%), width: 100%, height: 100%))
+  })
+)[
+  You can add a background to any slide using the `background` parameter.
+  
+  In this example, we use the university logo with a semi-transparent white overlay to ensure content readability.
+]
+
+// ==========================================
+= Boxes & Blocks
+// ==========================================
+
+#slide(title: "Institutional Boxes")[
+  #highlight-box(title: "Highlight Box")[Key points using theme blue.]
+  #v(0.5em)
+  #alert-box(title: "Alert Box", fill-mode: "fill")[Warnings using theme red.]
+  #v(0.5em)
+  #example-box(title: "Example Box", fill-mode: "full")[Examples using green.]
+]
+
+#slide(title: "Technical Blocks")[
+  #algorithm-box(title: "Algorithm Box")[
+    + Step 1: Initialize
+    + Step 2: Process
+  ]
+  #v(1em)
+  #themed-block(title: "Themed Block")[Adapts to the chosen faculty color.]
+]
+
+// ==========================================
+= Citations & References
+// ==========================================
+
+#slide(title: "Citations Style")[
+  Inline citations like @smith2023 or @einstein1905 are highlighted.
+  
+  You can also use corner boxes:
+  
+  #cite-box("smith2023", position: "bottom-right")
+  #cite-box("doe2024", display-label: "Jane Doe (2024)", position: "top-right")
+
+  _Note: The citation style can be customized via the `bib-style` parameter (default: "apa")._
+]
+
+#slide(title: "Bibliography Slide")[
+  The bibliography is standard and should be placed in a `#slide()`.
+  
+  #bibliography("refs.bib", title: none)
+]
+
+// ==========================================
+= Special Slide Types
+// ==========================================
+
+#focus-slide[
+  This is a `#focus-slide` for impactful messages.
+]
+
+#figure-slide(
+  rect(width: 40%, height: 30%, fill: sorbonne-lightblue),
+  title: "Figure Slide",
+  caption: [A centered caption]
+)
+
+#acknowledgement-slide(
+  subtitle: [Special thanks to my supervisor:],
+  people: ((name: "Prof. Smith", role: "Supervisor"),),
+  institutions: ("Sorbonne University",),
+)
+
+#equation-slide(
+  $ i hbar pdv(Psi, t) = - hbar^2 / (2m) laplacian(Psi) + V Psi $,
+  title: [Equation Slide],
+  definitions: [
+    / $Psi$: Wavefunction
+    / $V$: Potential energy
+  ],
+  citation: (bib-key: "einstein1905", label: "Quantum Origins")
+)
+
+// ==========================================
+= Dynamic Features
+// ==========================================
+
+#slide(title: "Sequential Reveal with pause")[
+  The `presentate` package allows for step-by-step reveals:
+  
+  - Point 1: Always visible.
+  #show: pause
+  - Point 2: Appears after a click.
+  #show: pause
+  - Point 3: Final point.
+
+]
+
+#slide(title: "Precise Control: only and uncover")[
+  You can control exactly which subslide an element appears on:
+  
+  #two-col(
+    [
+      #uncover(2, 3, 4)[Visible from step 2.] \
+      #uncover(3, 4)[Visible only at step 3.]
+    ],
+    [
+      #only(1)[Step 1 content.]
+      #only(2)[Step 2 content.]
+      #only(3, 4)[Step 3 content.]
+    ]
+  )
+  
+  #uncover(4)[
+    #v(1em)
+    #alert-box(title: "Important Limitation")[
+      Dynamic animations are *incompatible* with the `allow-slide-breaks: true` option.
+    ]
+  ]
+
+]
+
+// ==========================================
+= Template Configuration
+// ==========================================
+
+#slide(title: "Appendix & Hierarchy Control")[
+  #two-col(
+    [
+      *Using Appendices*
+      - Call `#appendix()` to start.
+      - Resets heading counters.
+      - Displays a focus slide using `annex-main-title`.
+      - Changes numbering style to `annex-title` + `annex-numbering-format`.
+    ],
+    [
+      *Mapping Logic*
+      - `mapping` defines roles for levels:
+      - `(section: 1)` : Level 1 is a section.
+      - `(part: 1, section: 2)` : Level 1 is a Part, Level 2 is a Section.
+      - Transition slides and breadcrumbs adapt to these roles.
+    ]
+  )
+]
+
+#slide(title: "Theme Configuration Reference (1/2)")[
+  #set text(size: 0.72em)
+  #two-col(
+    [
+      *Identification & Date*
+      - `title`, `short-title`, `subtitle`.
+      - `author`, `short-author`, `affiliation`.
+      - `date`: Defaults to today.
+      
+      *Visual Identity*
+      - `faculty`: `"univ"` (default), `"sante"`, `"sciences"`, `"lettres"`.
+      - `primary-color` / `alert-color`: Manual hex/rgb overrides.
+      - `logo-slide` / `logo-transition`: Image paths.
+      
+      *Typography & Global*
+      - `text-font` / `text-size`: e.g., `"Fira Sans"`, `20pt`.
+      - `aspect-ratio`: `"16-9"` or `"4-3"`.
+    ],
+    [
+      *Outline (TOC)*
+      - `show-outline`: Toggle summary slide.
+      - `outline-title`: Title of the TOC.
+      - `outline-depth`: Levels shown in TOC.
+      - `outline-columns`: Number of columns for TOC.
+      
+      *Header & Numbering*
+      - `show-header-numbering`: Toggle all numbers.
+      - `numbering-format`: For sections (e.g., `"1.1"`).
+      - `part-numbering-format`: For parts (e.g., `"I"`).
+    ]
+  )
+]
+
+#slide(title: "Theme Configuration Reference (2/2)")[
+  #set text(size: 0.8em)
+  *Navigation & Appendix*
+  - `mapping`: Dict of roles (part/section/subsection) vs levels.
+  - `auto-title`: Boolean. If true, slides without a title use the section name.
+  - `transitions`: Dictionary for `navigator` roadmap customization.
+  - `bib-style`: Bibliography style (default: `"apa"`).
+  - `annex-title`: Prefix for single appendix (e.g., `"Appendix"`).
+  - `annex-main-title`: Focus slide text (e.g., `"Technical Annexes"`).
+  - `annex-numbering-format`: Numbering style (e.g., `"A"`, `"I"`, `"1"`).
+  - `progress-bar`: Position of the bar (`"none"`, `"top"`, `"bottom"`).
+  - `slide-break-suffix`: Suffix for broken slides (default: `" (cont.)"`).
+  - `footer-author` / `footer-title`: Boolean toggles for footer info.
+  - `max-length`: (`int` or `dict`) Truncate breadcrumb titles. Ex: `20` or `(section: 10, subsection: 20)`.
+]
+
+#ending-slide()
diff --git a/packages/preview/sorbonne-presentation/0.1.0/examples/refs.bib b/packages/preview/sorbonne-presentation/0.1.0/examples/refs.bib
new file mode 100644
index 0000000000..419a6e63fb
--- /dev/null
+++ b/packages/preview/sorbonne-presentation/0.1.0/examples/refs.bib
@@ -0,0 +1,22 @@
+@article{smith2023,
+  title={Improvements in Typst Templates},
+  author={Smith, John},
+  journal={Journal of Typesetting},
+  year={2023}
+}
+
+@book{doe2024,
+  title={The Art of Presentations},
+  author={Doe, Jane},
+  publisher={Sorbonne Press},
+  year={2024}
+}
+
+@article{einstein1905,
+  title={Does the Inertia of a Body Depend Upon Its Energy Content?},
+  author={Einstein, Albert},
+  journal={Annalen der Physik},
+  volume={18},
+  pages={639--641},
+  year={1905}
+}
\ No newline at end of file
diff --git a/packages/preview/sorbonne-presentation/0.1.0/lib.typ b/packages/preview/sorbonne-presentation/0.1.0/lib.typ
new file mode 100644
index 0000000000..22b7c815d5
--- /dev/null
+++ b/packages/preview/sorbonne-presentation/0.1.0/lib.typ
@@ -0,0 +1,2 @@
+#import "sorbonne.typ": template, slide, focus-slide, figure-slide, figure-slide-split, acknowledgement-slide, equation-slide, ending-slide, cite-box, alert, muted, subtle, appendix, slide-break, two-col, three-col, grid-2x2, highlight-box, alert-box, example-box, algorithm-box, themed-block, sorbonne-red, sorbonne-blue, sorbonne-lightblue, sorbonne-yellow, sorbonne-text
+#import "@preview/presentate:0.2.4": pause, uncover, only, fragments, step-item
\ No newline at end of file
diff --git a/packages/preview/sorbonne-presentation/0.1.0/sorbonne.typ b/packages/preview/sorbonne-presentation/0.1.0/sorbonne.typ
new file mode 100644
index 0000000000..ceff491234
--- /dev/null
+++ b/packages/preview/sorbonne-presentation/0.1.0/sorbonne.typ
@@ -0,0 +1,857 @@
+#import "@preview/presentate:0.2.4" as p
+#import p.store: states
+// On importe la version locale modifiée de navigator
+#import "@preview/navigator:0.1.3" as nav
+
+// --- Configuration et Couleurs ---
+#let sorbonne-red = rgb("#AC182E")
+#let sorbonne-blue = rgb("#1D2769")
+#let sorbonne-lightblue = rgb("#52B5E5")
+#let sorbonne-yellow = rgb("#FFB700")
+#let sorbonne-text = rgb("#263068")
+
+// État pour la configuration du thème
+#let config-state = state("sorbonne-config", none)
+#let last-main-page = state("last-main-page", none)
+#let logical-slide-counter = counter("sorbonne-logical-slide")
+
+// --- Composants ---
+
+#let progress-bar-line() = context {
+  let conf = config-state.get()
+  if conf == none or conf.progress-bar == "none" { return none }
+  
+  let current = logical-slide-counter.get().at(0)
+  let appendix-marker = query(<sorbonne-appendix-marker>)
+  let total = if appendix-marker.len() > 0 {
+    logical-slide-counter.at(appendix-marker.first().location()).at(0) - 1
+  } else {
+    logical-slide-counter.final().at(0)
+  }
+  
+  if total == 0 { return none }
+  
+  let is-annex = if appendix-marker.len() > 0 {
+    appendix-marker.first().location().page() <= here().page()
+  } else { false }
+
+  let ratio = if is-annex { 1.0 } else { calc.min(1.0, current / total) }
+  
+  block(width: 100% * ratio, height: 2pt, fill: conf.primary-color)
+}
+
+#let empty-slide(fill: none, body) = {
+  set page(margin: 0pt, fill: fill, header: none, footer: none, foreground: none)
+  [
+    #logical-slide-counter.step()
+    #p.slide(logical-slide: true, {
+      [#metadata((title: none, subtitle: none, allow-slide-breaks: false)) <sorbonne-slide-start>]
+      body
+    })
+  ]
+}
+
+#let breadcrumb() = context {
+  let conf = config-state.get()
+  if conf == none { return none }
+  set text(size: 0.8em, fill: gray.darken(20%))
+  
+  let mapping = conf.mapping
+  let level-modes = (:)
+  for role in ("part", "section", "subsection") {
+    let lvl = mapping.at(role, default: none)
+    if lvl != none { level-modes.insert("level-" + str(lvl) + "-mode", "current") }
+  }
+
+  nav.progressive-outline(
+    ..level-modes,
+    layout: "horizontal",
+    separator: text(fill: gray.lighten(50%), "  /  "),
+    clickable: false,
+  )
+}
+
+#let sorbonne-header() = context {
+  let conf = config-state.get()
+  if conf == none { return none }
+  
+  let markers = query(<sorbonne-slide-start>)
+  if markers.len() == 0 { return none }
+  
+  // On cherche le marqueur qui s'applique à cette page.
+  // C'est soit un marqueur sur cette page, soit le dernier marqueur avant.
+  let current-page = here().page()
+  let marker = markers.filter(m => m.location().page() <= current-page).last()
+  let h = marker.value
+  
+  // On n'affiche (suite) que si allow-slide-breaks est activé ET qu'on est sur une page physique suivante
+  let allow-breaks = if type(h) == dictionary { h.at("allow-slide-breaks", default: false) } else { false }
+  let is-continuation = current-page > marker.location().page() and allow-breaks
+  
+  let resolved-title = if type(h) == dictionary and h.title != none { h.title } else { nav.resolve-slide-title(none) }
+  if resolved-title == none and h.subtitle == none { return none }
+
+  let title-display = if is-continuation and resolved-title != none {
+    resolved-title + text(size: 0.8em, weight: "regular", fill: sorbonne-text.lighten(40%), conf.slide-break-suffix)
+  } else {
+    resolved-title
+  }
+
+  block(width: 100%, inset: (x: 2em, top: 0.8em, bottom: 0.2em), {
+    grid(
+      columns: (4.5em, 1fr),
+      column-gutter: 1.5em,
+      align: horizon,
+      image(conf.logo-slide, width: 4.5em),
+      stack(dir: ttb, spacing: 0.3em,
+        if resolved-title != none {
+          text(size: 1.1em, weight: "bold", fill: sorbonne-text, smallcaps(title-display))
+        },
+        if h.subtitle != none {
+          text(size: 0.85em, style: "italic", fill: sorbonne-text.lighten(20%), h.subtitle)
+        }
+      )
+    )
+  })
+}
+
+#let sorbonne-footer() = context {
+  let conf = config-state.get()
+  if conf == none { return none }
+  
+  block(width: 100%, inset: (x: 2.5em, bottom: 0.8em, top: 0.2em), {
+    set text(size: 0.65em, fill: gray.darken(20%))
+    line(length: 100%, stroke: 0.5pt + gray.lighten(80%))
+    v(0.5em)
+
+    let show-author = conf.footer-author
+    let show-title = conf.footer-title
+    
+    if not show-author and not show-title {
+      grid(
+        columns: (1fr, auto),
+        align: (left, right),
+        breadcrumb(),
+        context {
+          let current = logical-slide-counter.get().at(0)
+          let appendix-marker = query(<sorbonne-appendix-marker>)
+          let total = if appendix-marker.len() > 0 {
+            logical-slide-counter.at(appendix-marker.first().location()).at(0) - 1
+          } else {
+            logical-slide-counter.final().at(0)
+          }
+          [#current / #total]
+        }
+      )
+    } else {
+      grid(
+        columns: (1fr, 1fr, 1fr),
+        align: (left, center, right),
+        text(size: 0.9em, weight: "regular", {
+          if show-author { conf.short-author }
+          if show-author and show-title [ #h(0.5em) · #h(0.5em) ]
+          if show-title { conf.short-title }
+        }),
+        breadcrumb(),
+        context {
+          let current = logical-slide-counter.get().at(0)
+          let appendix-marker = query(<sorbonne-appendix-marker>)
+          let total = if appendix-marker.len() > 0 {
+            logical-slide-counter.at(appendix-marker.first().location()).at(0) - 1
+          } else {
+            logical-slide-counter.final().at(0)
+          }
+          [#current / #total]
+        }
+      )
+    }
+  })
+}
+
+#let apply-layout(breakable: true, body) = context {
+  let config = config-state.get()
+  set text(font: config.text-font, size: config.text-size, fill: sorbonne-text)
+  
+  if not breakable {
+    // Le grid 1fr occupe tout l'espace disponible, permettant le centrage vertical (horizon)
+    // tout en s'ajustant si des notes de bas de page sont présentes.
+    grid(
+      columns: 100%,
+      rows: 1fr,
+      inset: (x: 2.5em, top: 0.5em, bottom: 0pt),
+      {
+        metadata((t: "ContentSlide"))
+        body
+      }
+    )
+  } else {
+    block(width: 100%, breakable: true, inset: (x: 2.5em, top: 0.5em, bottom: 0pt), {
+      metadata((t: "ContentSlide"))
+      body
+    })
+  }
+}
+
+#let focus-slide(body, subtitle: none) = context {
+  let conf = config-state.get()
+  empty-slide(fill: conf.primary-color, {
+    place(top + left, pad(top: 2em, left: 2em, image(conf.logo-transition, width: 5em)))
+    set text(fill: white, weight: "bold")
+    align(center + horizon, stack(dir: ttb, spacing: 1em,
+      text(size: 2.5em, body),
+      if subtitle != none {
+        text(size: 1.5em, weight: "regular", style: "italic", fill: white.transparentize(20%), subtitle)
+      }
+    ))
+  })
+}
+
+#let alert(body) = context {
+  let conf = config-state.get()
+  text(fill: conf.alert-color, weight: "bold", body)
+}
+
+#let muted(body) = text(fill: gray, body)
+
+#let subtle(body) = text(fill: gray.lighten(40%), body)
+
+#let two-col(left, right, columns: (1fr, 1fr), gutter: 2em) = {
+  grid(
+    columns: columns,
+    column-gutter: gutter,
+    left,
+    right
+  )
+}
+
+#let three-col(left, center, right, columns: (1fr, 1fr, 1fr), gutter: 2em) = {
+  grid(
+    columns: columns,
+    column-gutter: gutter,
+    left,
+    center,
+    right
+  )
+}
+
+#let grid-2x2(tl, tr, bl, br, columns: (1fr, 1fr), rows: (auto, auto), gutter: 2em) = {
+  grid(
+    columns: columns,
+    rows: rows,
+    column-gutter: gutter,
+    row-gutter: gutter,
+    tl,
+    tr,
+    bl,
+    br
+  )
+}
+
+// --- API ---
+
+#let slide(..args) = {
+  let pos = args.pos()
+  let named = args.named()
+  let manual-title = named.at("title", default: none)
+  let subtitle = named.at("subtitle", default: none)
+  let allow-slide-breaks = named.at("allow-slide-breaks", default: false)
+  let background = named.at("background", default: none)
+  let body = if pos.len() > 0 { pos.at(0) } else { none }
+  
+  let clean-named = named
+  for key in ("title", "subtitle", "allow-slide-breaks", "background") {
+    if key in clean-named { 
+      let _ = clean-named.remove(key)
+    }
+  }
+  
+  [
+    #logical-slide-counter.step()
+    #p.slide(..clean-named, {
+      if background != none {
+        place(top + left, dx: 0pt, dy: -4.5em, block(width: 100%, height: 100% + 4.5em + 3.0em, background))
+      }
+      [#metadata((title: manual-title, subtitle: subtitle, allow-slide-breaks: allow-slide-breaks)) <sorbonne-slide-start>]
+      apply-layout(breakable: allow-slide-breaks, body)
+    })
+  ]
+}
+
+#let figure-slide(fig, title: none, subtitle: none, caption: none, ..args) = {
+  slide(title: title, subtitle: subtitle, ..args, {
+    set align(center + horizon)
+    figure(fig, caption: caption)
+  })
+}
+
+#let figure-slide-split(fig-left, fig-right, title: none, subtitle: none, caption-left: none, caption-right: none, ..args) = {
+  slide(title: title, subtitle: subtitle, ..args, {
+    set align(center + horizon)
+    grid(
+      columns: (1fr, 1fr),
+      column-gutter: 2em,
+      figure(fig-left, caption: caption-left),
+      figure(fig-right, caption: caption-right)
+    )
+  })
+}
+
+#let acknowledgement-slide(
+  title: "Acknowledgements",
+  subtitle: none,
+  people: (),
+  institutions: (),
+  extra: none,
+  ..args
+) = {
+  slide(title: title, subtitle: subtitle, ..args, {
+    set align(center + horizon)
+    stack(
+      dir: ttb,
+      spacing: 1.5em,
+      
+      if people.len() > 0 {
+        align(center, grid(
+          columns: (auto, auto),
+          column-gutter: 2em,
+          row-gutter: 1em,
+          ..people.map(p => (
+            align(right, text(weight: "bold", p.name)),
+            align(left, p.role)
+          )).flatten()
+        ))
+      },
+      
+      if institutions.len() > 0 {
+        v(0.5em)
+        align(center, institutions.join([ #h(2em) ]))
+      },
+
+      if extra != none {
+        v(1em)
+        extra
+      }
+    )
+  })
+}
+
+#let cite-box(bib-key, display-label: none, position: "bottom-right", form: "normal") = context {
+  let conf = config-state.get()
+  
+  let align-pos = if position == "top-right" { top + right }
+    else if position == "bottom-left" { bottom + left }
+    else { bottom + right }
+  
+  let dx = if "right" in position { 1em } else { -1em }
+  let dy = if "top" in position { -0.3em } else { 0.3em }
+
+  let keys = if type(bib-key) == array { bib-key } else if bib-key != none { (bib-key,) } else { () }
+  let labels = keys.map(k => if type(k) == str { label(k) } else { k })
+
+  let content = if display-label != none {
+    // On "cite" de manière invisible pour forcer l'inclusion en bibliographie
+    if labels.len() > 0 { 
+      place(hide(labels.map(l => cite(l, form: form)).join())) 
+    }
+    display-label
+  } else if labels.len() > 0 {
+    labels.map(l => cite(l, form: form)).join(", ")
+  } else {
+    none
+  }
+
+  if content != none {
+    place(align-pos, dx: dx, dy: dy, block(
+      fill: conf.primary-color.lighten(95%),
+      stroke: 0.5pt + conf.primary-color,
+      radius: 3pt,
+      inset: 0.4em, 
+      text(size: 0.65em, fill: conf.primary-color, content)
+    ))
+  }
+}
+
+#let equation-slide(
+  equation,
+  title: "Equation",
+  subtitle: none,
+  definitions: none,
+  citation: none,
+  ..args
+) = {
+  slide(title: title, subtitle: subtitle, ..args, {
+    set align(center + horizon)
+    
+    stack(
+      dir: ttb,
+      spacing: 2em,
+      
+      // Bloc Equation + Signature
+      stack(
+        dir: ttb,
+        spacing: 0.8em,
+        block(
+          text(size: 2.5em, weight: "bold", equation)
+        ),
+        if citation != none {
+          let key = if type(citation) == dictionary { citation.at("bib-key", default: none) } else { citation }
+          let lbl = if type(citation) == dictionary { citation.at("label", default: none) } else { none }
+          let keys = if type(key) == array { key } else if key != none { (key,) } else { () }
+          let labels = keys.map(k => if type(k) == str { label(k) } else { k })
+          
+          if labels.len() > 0 { place(hide(labels.map(l => cite(l)).join())) }
+          
+          let cite-content = if lbl != none { lbl } else { labels.map(l => cite(l)).join(", ") }
+          
+          // Style "Signature" : à droite, en gris, avec tiret
+          align(right, pad(right: 15%, text(fill: gray.darken(20%), size: 0.9em, [--- #cite-content])))
+        }
+      ),
+      
+      // Boîte de définitions
+      if definitions != none {
+        context {
+          let conf = config-state.get()
+          block(
+            width: 85%,
+            fill: conf.primary-color.lighten(95%),
+            stroke: (left: 3pt + conf.primary-color), // Bordure gauche élégante
+            inset: 1.5em,
+            radius: (right: 4pt),
+            align(left, {
+              set par(leading: 0.8em)
+              definitions
+            })
+          )
+        }
+      }
+    )
+  })
+}
+
+#let ending-slide(
+  title: [Thanks for watching!],
+  subtitle: [Questions?],
+  contact: ("email@example.com", "github.com/username")
+) = context {
+  let conf = config-state.get()
+  empty-slide(fill: conf.primary-color, {
+    place(top + left, pad(top: 2em, left: 2em, image(conf.logo-transition, width: 5em)))
+    set text(fill: white)
+    align(center + horizon, stack(
+      spacing: 1.5em,
+      text(size: 2.5em, weight: "bold", title),
+      if subtitle != none { text(size: 1.5em, style: "italic", fill: white.transparentize(20%), subtitle) },
+      if contact != none and contact != () {
+        v(1em)
+        set text(size: 1em, weight: "regular")
+        if type(contact) == array {
+          contact.join([ #h(2em) ])
+        } else {
+          contact
+        }
+      }
+    ))
+  })
+}
+
+// --- Boîtes et Blocs ---
+
+#let _base-box(title: none, body, color: black, fill-mode: "outline") = {
+  let (fill-body, stroke-box) = if fill-mode == "fill" {
+    (color.lighten(90%), 0.5pt + color)
+  } else if fill-mode == "full" {
+    (color.lighten(80%), 0.5pt + color)
+  } else if fill-mode == "transparent" {
+    (none, none)
+  } else {
+    // outline
+    (none, 0.5pt + color)
+  }
+  
+  block(
+    width: 100%,
+    radius: 4pt,
+    clip: true,
+    stroke: stroke-box,
+    stack(
+      spacing: 0pt,
+      if title != none {
+        block(
+          width: 100%,
+          fill: color,
+          inset: 0.6em,
+          text(fill: white, weight: "bold", title)
+        )
+      },
+      block(
+        width: 100%,
+        fill: fill-body,
+        inset: 0.8em,
+        body
+      )
+    )
+  )
+}
+
+#let highlight-box(title: "Key Point", fill-mode: "outline", body) = {
+  _base-box(title: title, body, color: sorbonne-blue, fill-mode: fill-mode)
+}
+
+#let alert-box(title: "Warning", fill-mode: "outline", body) = {
+  _base-box(title: title, body, color: sorbonne-red, fill-mode: fill-mode)
+}
+
+#let example-box(title: "Example", fill-mode: "outline", body) = {
+  _base-box(title: title, body, color: rgb("#2E7D32"), fill-mode: fill-mode)
+}
+
+#let algorithm-box(title: "Algorithm", fill-mode: "outline", body) = {
+  let algorithm-body = {
+    set text(font: ("Fira Code", "DejaVu Sans Mono"), size: 0.9em)
+    // On formate les listes numérotées comme des lignes de code
+    show enum: it => {
+      grid(
+        columns: (1.5em, 1fr),
+        column-gutter: 0.8em,
+        row-gutter: 0.5em,
+        ..it.children.enumerate().map(((i, child)) => (
+          align(right, text(fill: gray, str(i + 1) + ":")),
+          child.body
+        )).flatten()
+      )
+    }
+    body
+  }
+  _base-box(title: title, algorithm-body, color: rgb("#455A64"), fill-mode: fill-mode)
+}
+
+#let themed-block(title: none, fill-mode: "outline", body) = context {
+  let conf = config-state.get()
+  let color = conf.primary-color
+  _base-box(title: title, body, color: color, fill-mode: fill-mode)
+}
+
+#let appendix() = {
+  counter(heading).update(0)
+  [#metadata(none) <sorbonne-appendix-marker>]
+  context {
+    let conf = config-state.get()
+    focus-slide(upper(conf.annex-main-title))
+  }
+}
+
+#let slide-break() = colbreak(weak: true)
+
+// --- Template ---
+
+#let template(
+  title: none,
+  author: none,
+  short-title: none,
+  short-author: none,
+  affiliation: none,
+  subtitle: none,
+  date: datetime.today().display(),
+  aspect-ratio: "16-9",
+  text-font: "Fira Sans",
+  text-size: 20pt,
+  faculty: "sante",
+  // Surcharges optionnelles
+  primary-color: none,
+  alert-color: none,
+  logo-slide: none,
+  logo-transition: none,
+  show-header-numbering: true,
+  numbering-format: "1.1",
+  part-numbering-format: "I",
+  annex-title: [Annexe],
+  annex-main-title: [Annexes],
+  annex-numbering-format: "I",
+  mapping: (section: 1, subsection: 2),
+  bib-style: "apa",
+  transitions: (:),
+  show-outline: false,
+  outline-title: [Sommaire],
+  outline-depth: 2,
+  outline-columns: 1,
+  auto-title: true,
+  progress-bar: "none", // "none", "top", "bottom"
+  slide-break-suffix: [ (cont.)],
+  footer-author: true,
+  footer-title: true,
+  max-length: none,
+  use-short-title: false,
+  body
+) = {
+  // 1. Détermination des valeurs par défaut basées sur faculty
+  let (def-primary, def-alert, def-logo-transition, def-logo-slide) = if faculty == "sciences" {
+    (sorbonne-lightblue, sorbonne-lightblue.darken(40%), "assets/logo/sorbonne-sciences-white.png", "assets/logo/sorbonne-sciences.png")
+  } else if faculty == "lettres" {
+    (sorbonne-yellow, sorbonne-yellow.darken(45%), "assets/logo/sorbonne-lettres-white.png", "assets/logo/sorbonne-lettres.png")
+  } else if faculty == "univ" or faculty == none {
+    (sorbonne-blue, sorbonne-blue.darken(20%), "assets/logo/sorbonne-univ-white.png", "assets/logo/sorbonne-univ.png")
+  } else {
+    // Default is sante
+    (sorbonne-red, sorbonne-red.darken(15%), "assets/logo/sorbonne-sante-white.png", "assets/logo/sorbonne-sante.png")
+  }
+
+  // 2. Application des surcharges si fournies
+  let final-primary = if primary-color != none { primary-color } else { def-primary }
+  let final-alert = if alert-color != none { alert-color } else { def-alert }
+  let final-logo-transition = if logo-transition != none { logo-transition } else { def-logo-transition }
+  let final-logo-slide = if logo-slide != none { logo-slide } else { def-logo-slide }
+
+  config-state.update(c => (
+    title: title,
+    author: author,
+    short-title: if short-title != none { short-title } else { title },
+    short-author: if short-author != none { short-author } else { author },
+    affiliation: affiliation,
+    show-header-numbering: show-header-numbering,
+    numbering-format: numbering-format,
+    part-numbering-format: part-numbering-format,
+    annex-title: annex-title,
+    annex-main-title: annex-main-title,
+    annex-numbering-format: annex-numbering-format,
+    mapping: mapping,
+    primary-color: final-primary,
+    alert-color: final-alert,
+    logo-transition: final-logo-transition,
+    logo-slide: final-logo-slide,
+    text-font: text-font,
+    text-size: text-size,
+    progress-bar: progress-bar,
+    slide-break-suffix: slide-break-suffix,
+    footer-author: footer-author,
+    footer-title: footer-title,
+    max-length: max-length,
+    use-short-title: use-short-title,
+  ))
+  
+  nav.navigator-config.update(c => {
+    c.mapping = mapping
+    c.auto-title = auto-title
+    c.show-heading-numbering = show-header-numbering
+    c.slide-func = empty-slide
+    c.theme-colors = (primary: final-primary)
+    c.max-length = max-length
+    c.use-short-title = use-short-title
+    c.transitions = (
+      parts: (visibility: (part: "none", section: "none", subsection: "none")),
+      sections: (visibility: (part: "none", section: "none", subsection: "current-parent")),
+      subsections: (visibility: (part: "none", section: "none", subsection: "current-parent")),
+      style: (active-weight: "bold", active-color: white, inactive-opacity: 0.6, completed-opacity: 0.6),
+      marker: none,
+    ) + transitions
+    c.progressive-outline = nav.merge-dicts(
+      (
+        level-1-mode: "none",
+        level-2-mode: "none",
+        level-3-mode: "none",
+        text-styles: (
+          level-1: (active: (weight: "bold", fill: final-primary), completed: (weight: "bold"), inactive: (weight: "bold")),
+          level-2: (active: (weight: "regular", fill: final-primary), completed: (weight: "regular"), inactive: (weight: "regular")),
+          level-3: (active: (weight: "regular", fill: final-primary), completed: (weight: "regular"), inactive: (weight: "regular"))
+        ),
+      ),
+      base: c.at("progressive-outline", default: (:))
+    )
+    c
+  })
+
+  set page(
+    paper: "presentation-" + aspect-ratio, 
+    margin: (top: 4.5em, bottom: 3.0em, x: 0pt), 
+    header: none, 
+    footer: none,
+    foreground: context {
+      let conf = config-state.get()
+      if conf == none { return none }
+      
+      // Header & Footer
+      place(top + left, sorbonne-header())
+      place(bottom + left, sorbonne-footer())
+
+      // Progress bar
+      if conf.progress-bar != "none" {
+        let line = progress-bar-line()
+        if conf.progress-bar == "top" {
+          place(top + left, line)
+        } else if conf.progress-bar == "bottom" {
+          place(bottom + left, line)
+        }
+      }
+    }
+  )
+  set text(font: text-font, size: text-size, fill: sorbonne-text)
+  show math.equation: set text(font: "Fira Math")
+
+  // Listes à puces et énumérations thématiques
+  set list(marker: ([•], [‣], [–]).map(m => text(fill: final-primary, m)))
+  set enum(numbering: (n) => text(fill: final-primary, weight: "bold", str(n) + "."))
+  
+  // Définit le style de bibliographie
+  set bibliography(style: bib-style)
+
+    // Style des citations
+    show cite: it => context {
+      let conf = config-state.get()
+      box(
+        inset: (x: 2pt),
+        outset: (y: 2pt),
+        radius: 2pt,
+        fill: conf.primary-color.lighten(90%),
+              text(fill: conf.primary-color, it)
+            )
+          }
+        
+          set heading(numbering: (..nums) => context {
+        
+    if not show-header-numbering { return none }
+    let n = nums.pos()
+    
+    // Check if we are in appendix
+    let appendix-marker = query(<sorbonne-appendix-marker>)
+    let is-annex = if appendix-marker.len() > 0 {
+      appendix-marker.first().location().page() < here().page() or (appendix-marker.first().location().page() == here().page() and appendix-marker.first().location().position().y < here().position().y)
+    } else { false }
+
+    if is-annex {
+      let formats = (annex-numbering-format, "A", "1")
+      let parts = ()
+      for i in range(n.len()) {
+        parts.push(numbering(formats.at(i, default: "1"), n.at(i)))
+      }
+      return annex-title + " " + parts.join("")
+    }
+
+    let role = none
+    for (r, lvl) in mapping { if lvl == n.len() { role = r; break } }
+    
+    if role == "part" { 
+      numbering(part-numbering-format, ..n) 
+    } else if role == "section" or role == "subsection" {
+      let start-idx = if mapping.keys().contains("part") { 1 } else { 0 }
+      if n.len() > start-idx { 
+        numbering(numbering-format, ..n.slice(start-idx)) 
+      }
+    } else {
+      none
+    }
+  })
+
+  // Page de Titre
+  empty-slide(fill: final-primary, {
+    set text(fill: white)
+    place(bottom + right, pad(bottom: 2em, right: 2em, image(final-logo-transition, width: 6em)))
+    align(horizon, pad(x: 3em, y: 2em, stack(
+      spacing: 1.2em,
+      text(size: 2.5em, weight: "bold", smallcaps(title)),
+      if subtitle != none { text(size: 1.4em, style: "italic", subtitle) },
+      v(1.5em),
+      text(size: 1.2em, weight: "bold", author),
+      text(size: 1em, affiliation),
+      text(size: 0.9em, fill: white.transparentize(20%), date),
+    )))
+  })
+
+  // Sommaire automatique
+  if show-outline {
+    slide(title: outline-title, {
+      if outline-columns > 1 {
+        columns(outline-columns, outline(title: none, depth: outline-depth, indent: 2em))
+      } else {
+        outline(title: none, depth: outline-depth, indent: 2em)
+      }
+    })
+  }
+
+  show heading: h => context {
+    if h.level > 3 { return h }
+    
+    let conf = config-state.get()
+    
+    // Check if we are in appendix for this heading
+    let appendix-marker = query(<sorbonne-appendix-marker>)
+    let is-annex = if appendix-marker.len() > 0 {
+      appendix-marker.first().location().page() < h.location().page() or (appendix-marker.first().location().page() == h.location().page() and appendix-marker.first().location().position().y < h.location().position().y)
+    } else { false }
+
+    // En annexe, on ne fait des transitions que pour le niveau le plus haut mappé
+    let top-level = calc.min(..mapping.values())
+    if is-annex and h.level > top-level {
+      return place(hide(h))
+    }
+
+    nav.render-transition(
+      h,
+      top-padding: 0pt,
+      use-short-title: false,
+      content-wrapper: (roadmap, h, active) => {
+        set text(fill: white, font: "Fira Sans") 
+        place(top + left, pad(top: 2em, left: 2em, image(conf.logo-transition, width: 5em)))
+        
+        let role = none
+        for (r, lvl) in mapping { if lvl == h.level { role = r; break } }
+        
+        // --- CASE 1: PART TRANSITION (Centered Title, No Roadmap) ---
+        if role == "part" or (is-annex and role == "section" and not mapping.keys().contains("part")) {
+           align(center + horizon, stack(
+            spacing: 1.5em,
+            if conf.show-header-numbering {
+              let num = if is-annex {
+                conf.annex-title + " " + numbering(conf.annex-numbering-format, counter(heading).at(h.location()).at(0))
+              } else {
+                numbering(conf.part-numbering-format, counter(heading).at(h.location()).at(0))
+              }
+              text(size: if is-annex { 4em } else { 6em }, weight: "bold", num)
+            },
+            text(size: 3em, weight: "bold", upper(h.body))
+          ))
+        
+        // --- CASE 2: SECTION TRANSITION (Split Layout with Roadmap) ---
+        } else {
+          // 2.1. Active Part display (Top Right)
+          let part-lvl = mapping.at("part", default: none)
+          let active-part = if part-lvl != none { active.at("h" + str(part-lvl), default: none) } else { none }
+          if active-part != none {
+            place(top + right, pad(top: 2.5em, right: 3em, text(size: 0.8em, fill: white.transparentize(30%), weight: "bold", upper(active-part.body))))
+          }
+          
+          // 2.2. Main Content
+          let section-lvl = mapping.at("section", default: 1)
+          let section-head = active.at("h" + str(section-lvl), default: h)
+          let count = counter(heading).at(section-head.location())
+          let start-idx = if mapping.keys().contains("part") { 1 } else { 0 }
+          let nums = count.slice(start-idx)
+          
+          pad(x: 2em, stack(
+            dir: ttb,
+            v(15%),
+            align(center, stack(
+              spacing: 0.8em, 
+              if conf.show-header-numbering {
+                let fmt-num = if is-annex {
+                  conf.annex-title + " " + numbering(conf.annex-numbering-format, ..nums)
+                } else {
+                  numbering(conf.numbering-format, ..nums)
+                }
+                if is-annex {
+                  text(size: 3.5em, weight: "bold", fmt-num + " " + smallcaps(section-head.body))
+                } else {
+                  text(size: 6em, weight: "bold", fmt-num)
+                }
+              },
+              if not is-annex { text(size: 2.2em, weight: "bold", smallcaps(section-head.body)) },
+              v(1.2em),
+              block(width: 60%, align(left, roadmap))
+            ))
+          ))
+        }
+      }
+    )
+  }
+  
+  body
+}
diff --git a/packages/preview/sorbonne-presentation/0.1.0/template/main.typ b/packages/preview/sorbonne-presentation/0.1.0/template/main.typ
new file mode 100644
index 0000000000..a39d75d131
--- /dev/null
+++ b/packages/preview/sorbonne-presentation/0.1.0/template/main.typ
@@ -0,0 +1,46 @@
+#import "@preview/sorbonne-presentation:0.1.0": *
+
+// --- Theme Configuration ---
+#show: template.with(
+  title: [Presentation Title],
+  subtitle: [Subtitle or Context],
+  author: [Your Name],
+  affiliation: [Your Laboratory / Department],
+  // faculty: "univ", // Presets: "univ" (blue), "sante" (red), "sciences" (light blue), "lettres" (yellow)
+  date: datetime.today().display(),
+  show-outline: true, // Show the table of contents at the beginning
+)
+
+// --- Content ---
+
+= Introduction
+
+#slide(title: "Welcome")[
+  This is a sample presentation using the Sorbonne theme.
+  
+  - Respects the university's visual identity.
+  - Built on top of `presentate` and `navigator` packages.
+]
+
+= First Part
+
+== Key Concepts
+
+#slide[
+  You can use numbered and bulleted lists:
+  + First important point
+  + Second crucial point
+    - Technical detail
+]
+
+#focus-slide[
+  "Focus" slides are designed for impactful messages or major transitions.
+]
+
+= Conclusion
+
+#ending-slide(
+  title: [Thank you for your attention!],
+  subtitle: [Any questions?],
+  contact: ("first.name@sorbonne-universite.fr",)
+)
diff --git a/packages/preview/sorbonne-presentation/0.1.0/thumbnail.png b/packages/preview/sorbonne-presentation/0.1.0/thumbnail.png
new file mode 100644
index 0000000000..3f830edfc0
Binary files /dev/null and b/packages/preview/sorbonne-presentation/0.1.0/thumbnail.png differ
diff --git a/packages/preview/sorbonne-presentation/0.1.0/typst.toml b/packages/preview/sorbonne-presentation/0.1.0/typst.toml
new file mode 100644
index 0000000000..40481f6349
--- /dev/null
+++ b/packages/preview/sorbonne-presentation/0.1.0/typst.toml
@@ -0,0 +1,17 @@
+[package]
+name = "sorbonne-presentation"
+version = "0.1.0"
+entrypoint = "lib.typ"
+authors = ["David Hajage"]
+license = "MIT"
+keywords = ["presentation", "sorbonne", "academic", "slides"]
+description = "A structured presentation theme for Sorbonne University, based on presentate and navigator."
+compiler = "0.12.0"
+categories = ["presentation"]
+repository = "https://github.com/eusebe/typst-sorbonne-presentation"
+exclude = ["tests", "*.pdf", "**/*.pdf", ".gitignore", ".DS_Store"]
+
+[template]
+path = "template"
+entrypoint = "main.typ"
+thumbnail = "thumbnail.png"