diff --git a/astro.config.mjs b/astro.config.mjs
index e9a6363..1831c87 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -18,6 +18,11 @@ export default defineConfig({
             theme: 'github-light',
         },
     },
-    integrations: [preact(), mdx()],
+    integrations: [
+        preact({
+            compat: true,
+        }),
+        mdx(),
+    ],
     output: 'static',
 })
diff --git a/bun.lockb b/bun.lockb
index fe08456..d1ef97b 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/package.json b/package.json
index 4d7fdde..9eefc62 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
         "@fontsource/source-sans-pro": "^5.0.8",
         "@fontsource/space-mono": "^5.0.20",
         "@phosphor-icons/core": "^2.1.1",
+        "@phosphor-icons/react": "^2.1.7",
         "@preact/signals": "^1.3.0",
         "@types/jsdom": "^21.1.7",
         "astro": "5.1.0",
diff --git a/src/client/DomandeEsamiCourse.tsx b/src/client/DomandeEsamiCourse.tsx
new file mode 100644
index 0000000..259177b
--- /dev/null
+++ b/src/client/DomandeEsamiCourse.tsx
@@ -0,0 +1,116 @@
+import { useEffect, useState } from 'preact/hooks'
+import { Funnel } from '@phosphor-icons/react'
+import { marked } from 'marked'
+
+import type { Database } from '@/data/domande-esami.yaml'
+
+const useRemoteValue = <T,>(url: string): T | null => {
+    const [value, setValue] = useState<T | null>(null)
+
+    useEffect(() => {
+        fetch(url)
+            .then(response => response.json())
+            .then(value => setValue(value))
+    }, [url])
+
+    return value
+}
+
+type Props = {
+    course: string
+}
+
+export const DomandeEsamiCourse = ({ course }: Props) => {
+    const database = useRemoteValue<Database>(`/domande-esami/api/${course}.json`)
+    if (!database) {
+        return <>Loading...</>
+    }
+
+    // @ts-ignore
+    requestIdleCallback(() => window.renderMath())
+
+    console.log(database)
+
+    const courseTags = [
+        ...new Set(
+            database.questions
+                .filter(question => question.course === course)
+                .flatMap(question => question.tags)
+        ),
+    ]
+
+    const [selectedTags, setSelectedTags] = useState<string[]>([])
+
+    const filteredQuestions = database.questions
+        .filter(question => question.course === course)
+        .filter(
+            question => selectedTags.length === 0 || selectedTags.every(tag => question.tags.includes(tag))
+        )
+
+    return (
+        <>
+            <div class="grid-center">
+                <h3>
+                    <a href="/domande-esami">Domande Esami</a>
+                </h3>
+                <h1>{database.names[course]}</h1>
+            </div>
+
+            <div class="card filter">
+                <div class="grid-h">
+                    <Funnel />
+                    <strong>Filtra Tag</strong>
+                </div>
+                <div class="flex-row-wrap">
+                    {selectedTags.length === 0
+                        ? courseTags.map(tag => (
+                              <div class="chip clickable" onClick={() => setSelectedTags([tag])}>
+                                  {tag}
+                              </div>
+                          ))
+                        : courseTags.map(tag => (
+                              <div
+                                  class={
+                                      selectedTags.includes(tag)
+                                          ? 'chip clickable'
+                                          : 'chip clickable disabled'
+                                  }
+                                  onClick={() =>
+                                      setSelectedTags(
+                                          selectedTags.includes(tag)
+                                              ? selectedTags.filter(t => t !== tag)
+                                              : [...selectedTags, tag]
+                                      )
+                                  }
+                              >
+                                  {tag}
+                              </div>
+                          ))}
+                </div>
+            </div>
+            <div class="wide-card-list" id="questions">
+                {filteredQuestions.length === 0 ? (
+                    <div class="grid-center">
+                        <em>No questions found</em>
+                    </div>
+                ) : (
+                    filteredQuestions.map(question => (
+                        <div class="card">
+                            <div
+                                class="text"
+                                dangerouslySetInnerHTML={{
+                                    __html: marked(question.content, { async: false }),
+                                }}
+                            />
+                            <div class="metadata">
+                                {question.tags.map(tag => (
+                                    <div class="chip small">{tag}</div>
+                                ))}
+                            </div>
+                        </div>
+                    ))
+                )}
+            </div>
+        </>
+    )
+}
diff --git a/src/data/domande-esami.yaml b/src/data/domande-esami.yaml
index 3549afe..2ed339d 100644
--- a/src/data/domande-esami.yaml
+++ b/src/data/domande-esami.yaml
@@ -21,7 +21,7 @@ names:
 
 groups:
     - id: triennale-anno-1
-      name: Triennale - Anno I
+      name: I Anno Triennale
       items:
           - aritmetica
           - geometria-1
@@ -29,14 +29,14 @@ groups:
           - algebra-1
 
     - id: triennale-anno-2
-      name: Triennale - Anno II
+      name: II Anno Triennale
       items:
           - geometria-2
           - analisi-2
           - algebra-1
 
     - id: triennale-anno-3
-      name: Triennale - Anno III
+      name: III Anno Triennale
       items:
           - ricerca-operativa
           - fisica-3
@@ -60,101 +60,142 @@ groups:
 
 questions:
     - course: geometria-1
-      year: 2024
       content: |
           Dimostrare il teorema spettrale reale
+      tags:
+          - 2024
 
     - course: gtd
-      year: 2024
       content: |
           Calcolare la curvatura gaussiana di una sfera di raggio $r$
+      tags:
+          - 2024
 
     - course: geometria-1
-      year: 2023
       content: |
           Dimostrare che _l'area_ di un cerchio è $A = \pi r^2$
+      tags:
+          - 2023
 
     - course: algebra-1
-      year: 2024
       content: |
           Dimostrare il teorema di Sylow
+      tags:
+          - 2024
 
     - course: algebra-1
-      year: 2023
       content: |
           Dimostrare che ogni sottogruppo di un gruppo ciclico è ciclico
+      tags:
+          - 2023
 
     - course: analisi-1
-      year: 2024
       content: |
           Dimostrare il teorema di Weierstrass
+      tags:
+          - 2024
 
     - course: analisi-1
-      year: 2023
       content: |
           Dimostrare che se $f$ è continua su $[a,b]$, allora $f$ è limitata
+      tags:
+          - 2023
 
     - course: analisi-2
-      year: 2024
       content: |
           Dimostrare il teorema di Stokes
+      tags:
+          - 2024
 
     - course: analisi-2
-      year: 2023
       content: |
           Dimostrare il teorema di Green
+      tags:
+          - 2023
 
     - course: analisi-3
-      year: 2024
       content: |
           Dimostrare il teorema di Cauchy
+      tags:
+          - 2024
 
     - course: analisi-3
-      year: 2023
       content: |
           Dimostrare il teorema di Liouville
+      tags:
+          - 2023
 
     - course: algebra-2
-      year: 2024
       content: |
           Dimostrare il teorema di struttura per i gruppi abeliani finiti
+      tags:
+          - 2024
 
     - course: algebra-2
-      year: 2023
       content: |
           Dimostrare il teorema di struttura per i gruppi finiti
+      tags:
+          - 2023
 
     - course: ricerca-operativa
-      year: 2024
       content: |
           Dimostrare il teorema di dualità per i problemi di programmazione lineare
+      tags:
+          - 2024
 
     - course: geometria-topologia-differenziale
-      year: 2024
       content: |
           Dimostrare il teorema di Poincaré-Hopf
+      tags:
+          - 2024
 
     - course: analisi-armonica
-      year: 2024
       content: |
           Dimostrare il teorema di Hahn-Banach
+      tags:
+          - 2024
 
     - course: analisi-complessa
-      year: 2024
       content: |
           Dimostrare il teorema di Morera
+      tags:
+          - 2024
 
     - course: analisi-complessa
-      year: 2023
       content: |
           Dimostrare il teorema degli zeri di Weierstrass
+      tags:
+          - 2023
 
     - course: analisi-complessa
-      year: 2022
       content: |
           Dimostrare il teorema della mappa aperta
+      tags:
+          - 2022
 
     - course: analisi-complessa
-      year: 2021
       content: |
           Dimostrare il teorema della mappa aperta
+      tags:
+          - 2021
+
+    - course: geometria-2
+      content: |
+          Dimostrare il teorema di Van Kampen
+      tags:
+          - 2024
+          - Frigerio
+
+    - course: geometria-2
+      content: |
+          Definizione di gruppo fondamentale
+      tags:
+          - 2023
+          - Frigerio
+
+    - course: geometria-2
+      content: |
+          Dimostrare il teorema Cauchy
+      tags:
+          - 2022
+          - Abate
diff --git a/src/files.d.ts b/src/files.d.ts
index 975bb65..fb0b88c 100644
--- a/src/files.d.ts
+++ b/src/files.d.ts
@@ -17,21 +17,24 @@ declare module '@/data/macchinisti.yaml' {
 }
 
 declare module '@/data/domande-esami.yaml' {
-    type Question = {
+    export type Question = {
         course: string
-        year: number
         content: string
+        tags: string[]
     }
 
-    type Group = {
+    export type Group = {
         id: string
         name: string
         items: Array<string>
     }
 
-    const names: Record<string, string>
-    const groups: Group[]
-    const questions: Question[]
+    export type Database = {
+        names: Record<string, string>
+        groups: Group[]
+        questions: Question[]
+    }
 
-    export { names, groups, questions }
+    const value: Database
+    export default value
 }
diff --git a/src/layouts/BaseLayout.astro b/src/layouts/BaseLayout.astro
index 57c35b7..0929185 100644
--- a/src/layouts/BaseLayout.astro
+++ b/src/layouts/BaseLayout.astro
@@ -44,7 +44,7 @@ const { title, description, thumbnail, pageTags } = Astro.props
         <script>
             import renderMathInElement from 'katex/contrib/auto-render'
 
-            document.addEventListener('DOMContentLoaded', function () {
+            const renderMath = () => {
                 renderMathInElement(document.body, {
                     delimiters: [
                         { left: '$$', right: '$$', display: true },
@@ -54,7 +54,12 @@ const { title, description, thumbnail, pageTags } = Astro.props
                     ],
                     throwOnError: false,
                 })
-            })
+            }
+
+            document.addEventListener('DOMContentLoaded', () => renderMath())
+
+            // @ts-ignore
+            window.renderMath = renderMath
         </script>
 
         <script is:inline>
diff --git a/src/pages/domande-esami/[course].astro b/src/pages/domande-esami/[course].astro
index ddaf9be..65bc2b3 100644
--- a/src/pages/domande-esami/[course].astro
+++ b/src/pages/domande-esami/[course].astro
@@ -4,11 +4,11 @@ import BaseLayout from '@/layouts/BaseLayout.astro'
 import Footer from '@/components/Footer.astro'
 import Header from '@/components/Header.astro'
 
-import { PhosphorIcon } from '@/client/Icon'
-
 import { marked } from 'marked'
 
 import database from '@/data/domande-esami.yaml'
+import PhosphorIcon from '@/components/PhosphorIcon.astro'
+import { DomandeEsamiCourse } from '@/client/DomandeEsamiCourse'
 
 export const getStaticPaths = (() => {
     return Object.keys(database.names).map(course => ({
@@ -22,29 +22,7 @@ const { course } = Astro.params
 <BaseLayout title="Domande Esami | PHC" pageTags={'domande-esami'}>
     <Header />
     <main>
-        <h1>{course}</h1>
-
-        <div class="search">
-            <input type="text" placeholder="Cerca una domanda per un esame..." />
-            <PhosphorIcon client:load name="magnifying-glass" />
-        </div>
-
-        <div class="wide-card-list">
-            {
-                database.questions
-                    .filter(question => question.course === course)
-                    .map(question => (
-                        <div class="card">
-                            <div class="text">
-                                <Fragment set:html={marked(question.content)} />
-                            </div>
-                            <div class="metadata">
-                                <div class="chip">{question.year}</div>
-                            </div>
-                        </div>
-                    ))
-            }
-        </div>
+        <DomandeEsamiCourse client:load course={course} />
     </main>
     <Footer />
 </BaseLayout>
diff --git a/src/pages/domande-esami/api.json.ts b/src/pages/domande-esami/api.json.ts
new file mode 100644
index 0000000..12016fa
--- /dev/null
+++ b/src/pages/domande-esami/api.json.ts
@@ -0,0 +1,11 @@
+import type { APIRoute } from 'astro'
+
+import database from '@/data/domande-esami.yaml'
+
+export const GET: APIRoute = ({}) => {
+    return new Response(JSON.stringify(database), {
+        headers: {
+            'content-type': 'application/json',
+        },
+    })
+}
diff --git a/src/pages/domande-esami/api/[course].json.ts b/src/pages/domande-esami/api/[course].json.ts
new file mode 100644
index 0000000..1904e98
--- /dev/null
+++ b/src/pages/domande-esami/api/[course].json.ts
@@ -0,0 +1,24 @@
+import type { APIRoute, GetStaticPaths } from 'astro'
+
+import database from '@/data/domande-esami.yaml'
+
+export const getStaticPaths = (() => {
+    return Object.keys(database.names).map(course => ({
+        params: { course },
+    }))
+}) satisfies GetStaticPaths
+
+export const GET: APIRoute = ({ params: { course } }) => {
+    return new Response(
+        JSON.stringify({
+            groups: [],
+            names: Object.fromEntries(Object.entries(database.names).filter(([key]) => key === course)),
+            questions: database.questions.filter(question => question.course === course),
+        }),
+        {
+            headers: {
+                'content-type': 'application/json',
+            },
+        }
+    )
+}
diff --git a/src/pages/domande-esami/index.astro b/src/pages/domande-esami/index.astro
index 069ff78..0429116 100644
--- a/src/pages/domande-esami/index.astro
+++ b/src/pages/domande-esami/index.astro
@@ -18,46 +18,42 @@ const courseQuestionCounts = Object.fromEntries(
     <Header />
     <main>
         <h1>Domande Esami</h1>
-        <div class="card large">
-            <div class="text">
-                <p>
-                    [Copilot] Benvenuto nella sezione delle domande d'esame! Qui puoi trovare domande di esami
-                    passati per prepararti al meglio per il tuo prossimo esame.
-                </p>
-                <ul>
-                    <li><a href="#triennale-anno-1">Triennale - Anno I</a></li>
-                    <li><a href="#triennale-anno-2">Triennale - Anno II</a></li>
-                    <li><a href="#triennale-anno-3">Triennale - Anno III</a></li>
-                    <li><a href="#istituzioni">Istituzioni</a></li>
-                    <li><a href="#other">Esami a Scelta</a></li>
-                </ul>
-                <p>
-                    Se volessi contribuire con nuove domande, puoi <a href="#">facendo una pull request</a>,
-                    inviandole al
-                    <a href="#">form domande</a> oppure <a href="#">mandandoci una email</a>.
-                </p>
-            </div>
-        </div>
-
         {
             database.groups.map(group => (
-                <>
-                    <h2 id={group.id}>{group.name}</h2>
+                <details open>
+                    <summary>
+                        <h2 id={group.id}>
+                            <div class="details-closed">
+                                <PhosphorIcon name="caret-down" />
+                            </div>
+                            <div class="details-openned">
+                                <PhosphorIcon name="caret-up" />
+                            </div>
+                            {group.name}
+                        </h2>
+                    </summary>
                     <div class="wide-card-list">
                         {group.items.map(course => (
                             <a href={`/domande-esami/${course}`}>
                                 <div class="card">
                                     <h2>{database.names[course]}</h2>
                                     <div class="text">
-                                        <p>{courseQuestionCounts[course] || 0} domande disponibili</p>
+                                        <p>{courseQuestionCounts[course] || 0} domande</p>
                                     </div>
                                 </div>
                             </a>
                         ))}
                     </div>
-                </>
+                </details>
             ))
         }
+
+        <h3>Come Contribuire</h3>
+        <div class="card large">
+            <div class="text">
+                <p>Se hai raccolte di domande da condividere, puoi...</p>
+            </div>
+        </div>
     </main>
     <Footer />
 </BaseLayout>
diff --git a/src/styles/components.scss b/src/styles/components.scss
index c4e424f..dc3874d 100644
--- a/src/styles/components.scss
+++ b/src/styles/components.scss
@@ -14,7 +14,7 @@
         width: 22px;
         height: 22px;
 
-        display: grid;
+        display: grid inline;
         place-content: center;
     }
 
@@ -79,29 +79,6 @@
         }
     }
 
-    .flex-column {
-        display: flex;
-        flex-direction: column;
-        gap: 1rem;
-    }
-
-    .flex-row {
-        display: flex;
-        flex-direction: row;
-        gap: 1rem;
-    }
-
-    // just to know for reference
-    .fake-masonry {
-        display: grid;
-        grid-template-columns: repeat(var(--columns), 1fr);
-        grid-auto-flow: dense;
-
-        & > * {
-            grid-row: span var(--masonry-height);
-        }
-    }
-
     .search-results {
         width: 100%;
 
@@ -597,17 +574,6 @@
             grid-auto-flow: column;
             justify-content: start;
             gap: 0.5rem;
-
-            .chip {
-                background: #0003;
-                font-size: 13px;
-
-                padding: 0 0.25rem;
-                border-radius: 0.25rem;
-                line-height: 1.5;
-
-                font-weight: 600;
-            }
         }
 
         @media screen and (max-width: $screen-desktop-min) {
@@ -627,6 +593,33 @@
         }
     }
 
+    .chip {
+        user-select: none;
+
+        display: grid;
+        place-content: center;
+        place-items: center;
+
+        background: #0003;
+
+        padding: 0 0.25rem;
+        border-radius: 0.25rem;
+        line-height: 1.5;
+
+        font-size: 16px;
+        font-weight: 500;
+
+        &.small {
+            font-size: 13px;
+            font-weight: 600;
+        }
+
+        &.disabled {
+            color: #0005;
+            background: #0002;
+        }
+    }
+
     a:has(> .card) {
         display: contents;
     }
@@ -908,6 +901,10 @@
 
         justify-content: center;
 
+        .text > * {
+            max-width: none;
+        }
+
         @media screen and (max-width: $screen-desktop-min) {
             grid-template-columns: 1fr;
 
@@ -915,4 +912,68 @@
             gap: 1rem;
         }
     }
+
+    .filter {
+        min-width: 15rem;
+    }
+
+    .flex-column {
+        display: flex;
+        flex-direction: column;
+        gap: 0.5rem;
+    }
+
+    .flex-row {
+        display: flex;
+        flex-direction: row;
+        gap: 0.5rem;
+    }
+
+    .flex-row-wrap {
+        display: flex;
+        flex-direction: row;
+        gap: 0.5rem;
+        flex-wrap: wrap;
+    }
+
+    .grid-h {
+        display: grid;
+        grid-auto-flow: column;
+        justify-content: start;
+        align-items: center;
+
+        gap: 0.5rem;
+    }
+
+    .grid-v {
+        display: grid;
+        justify-items: start;
+        align-content: start;
+
+        grid-auto-flow: row;
+        gap: 0.5rem;
+    }
+
+    .grid-center {
+        display: grid;
+        place-content: center;
+        place-items: center;
+        gap: 0.5rem;
+        grid-auto-flow: row;
+    }
+
+    .clickable {
+        cursor: pointer;
+    }
+
+    // just to know for reference
+    .fake-masonry {
+        display: grid;
+        grid-template-columns: repeat(var(--columns), 1fr);
+        grid-auto-flow: dense;
+
+        & > * {
+            grid-row: span var(--masonry-height);
+        }
+    }
 }
diff --git a/src/styles/controls.scss b/src/styles/controls.scss
index 18ccc38..f0560c9 100644
--- a/src/styles/controls.scss
+++ b/src/styles/controls.scss
@@ -129,4 +129,47 @@
             justify-self: center;
         }
     }
+
+    details {
+        width: 100%;
+
+        summary {
+            display: grid;
+            place-content: center;
+            place-items: center;
+
+            list-style: none;
+            &::-webkit-details-marker {
+                display: none;
+            }
+        }
+
+        .details-openned,
+        .details-closed {
+            display: contents;
+        }
+
+        &:not([open]) {
+            .details-openned {
+                display: none;
+            }
+        }
+
+        &[open] {
+            summary {
+                padding-bottom: 1rem;
+            }
+
+            .details-closed {
+                display: none;
+            }
+        }
+
+        @media screen and (max-width: $screen-desktop-min) {
+            summary {
+                place-content: stretch;
+                place-items: stretch;
+            }
+        }
+    }
 }
diff --git a/src/styles/main.scss b/src/styles/main.scss
index ed95dd4..46ceb26 100644
--- a/src/styles/main.scss
+++ b/src/styles/main.scss
@@ -208,6 +208,10 @@ body {
         @media screen and (max-width: $screen-desktop-min) {
             padding: 3rem 1rem;
             gap: 3rem;
+
+            .card {
+                width: 100%;
+            }
         }
     }
 
diff --git a/src/styles/typography.scss b/src/styles/typography.scss
index 40fe7b0..5f51a81 100644
--- a/src/styles/typography.scss
+++ b/src/styles/typography.scss
@@ -33,6 +33,18 @@
 @layer typography {
     @include geometric-headings;
 
+    strong {
+        font-weight: 600;
+    }
+
+    em {
+        font-style: italic;
+    }
+
+    .text-center {
+        text-align: center;
+    }
+
     .text {
         // text-align: justify;
         // hyphens: auto;