diff --git a/website/src/_data/beta.js b/website/src/_data/beta.js
new file mode 100644
index 0000000..b7d1c3d
--- /dev/null
+++ b/website/src/_data/beta.js
@@ -0,0 +1,135 @@
+const REPO = "praktimarc/kst4contest";
+const API = `https://api.github.com/repos/${REPO}`;
+const RELEASES_URL = `https://github.com/${REPO}/releases`;
+
+/**
+ * Beta builds are published by .github/workflows/tagged-release.yml whenever
+ * a tag starting with "beta-" is pushed: it creates a GitHub prerelease with
+ * the same asset naming as a Stable release (based on the tag), except for
+ * the flatpakref, which is named ...beta.flatpakref instead of .flatpakref.
+ *
+ * There is no dedicated "beta" marker in the GitHub API beyond the
+ * prerelease flag, but that flag is exactly what this workflow sets, and
+ * nothing else in this repository publishes prereleases, so it is a safe
+ * signal to use here.
+ */
+async function fetchLatestBetaRelease() {
+    const headers = { Accept: "application/vnd.github+json" };
+
+    if (process.env.GITHUB_TOKEN) {
+        headers.Authorization = `Bearer ${process.env.GITHUB_TOKEN}`;
+    }
+
+    try {
+        const res = await fetch(`${API}/releases?per_page=10`, { headers });
+
+        if (!res.ok) {
+            throw new Error(`GitHub API /releases failed: ${res.status}`);
+        }
+
+        const releases = await res.json();
+
+        return releases.find((release) => release.prerelease && !release.draft) || null;
+    } catch (err) {
+        console.warn(
+            `[beta] Could not load the latest beta release. ` +
+            `The Beta tab will show its empty state instead: ${err.message}`
+        );
+
+        return null;
+    }
+}
+
+function unavailable() {
+    return {
+        available: false,
+        releasesUrl: RELEASES_URL,
+        items: []
+    };
+}
+
+/**
+ * Builds the Beta download list from the most recent GitHub prerelease.
+ * If there is currently no Beta release, the Beta tab is expected to show
+ * nothing but an explanatory empty state rather than guessed-at links.
+ */
+module.exports = async function () {
+    const release = await fetchLatestBetaRelease();
+
+    if (!release) {
+        return unavailable();
+    }
+
+    const tag = release.tag_name;
+    const assetUrl = (filenameTemplate) =>
+        `https://github.com/${REPO}/releases/download/${tag}/${filenameTemplate.replace(/\{tag\}/g, tag)}`;
+
+    const items = [
+        {
+            os: "Windows",
+            format: "ZIP x64",
+            icon: "🪟",
+            note: "Extract the archive, then start praktiKST.exe. No separate Java installation is required.",
+            url: assetUrl("praktiKST-{tag}-windows-x64.zip")
+        },
+        {
+            os: "Linux",
+            format: "Flatpak (.flatpakref)",
+            icon: "🐧",
+            note: "Installs the beta branch of the Flatpak repo through Flatpak or the desktop software centre.",
+            url: assetUrl("de.x08.KST4Contest.beta.flatpakref")
+        },
+        {
+            os: "Linux",
+            format: "AppImage x86_64",
+            icon: "🐧",
+            note: "Portable build without package installation. Make the downloaded file executable before the first launch.",
+            url: assetUrl("KST4Contest-{tag}-linux-x86_64.AppImage")
+        },
+        {
+            os: "Debian / Ubuntu",
+            format: "DEB amd64",
+            icon: "📦",
+            note: "Native package for Debian, Ubuntu and distributions based on them.",
+            url: assetUrl("KST4Contest-{tag}-debian-amd64.deb")
+        },
+        {
+            os: "Fedora",
+            format: "RPM x86_64",
+            icon: "📦",
+            note: "Native package built for Fedora and compatible RPM-based systems.",
+            url: assetUrl("KST4Contest-{tag}-fedora-x86_64.rpm")
+        },
+        {
+            os: "Arch Linux",
+            format: "pkg.tar.zst",
+            icon: "📦",
+            note: "Release package for direct installation with pacman.",
+            url: assetUrl("KST4Contest-{tag}-archlinux-x86_64.pkg.tar.zst")
+        },
+        {
+            os: "macOS Apple Silicon",
+            format: "DMG arm64",
+            icon: "🍎",
+            note: "Best-effort build for Apple Silicon Macs. Not currently notarized by Apple.",
+            url: assetUrl("KST4Contest-{tag}-macos-arm64.dmg")
+        },
+        {
+            os: "macOS Intel",
+            format: "DMG x86_64",
+            icon: "🍎",
+            note: "Best-effort build for Intel Macs. Not currently notarized by Apple.",
+            url: assetUrl("KST4Contest-{tag}-macos-x86_64.dmg")
+        }
+    ];
+
+    return {
+        available: true,
+        releasesUrl: RELEASES_URL,
+        tag,
+        name: release.name,
+        publishedAt: release.published_at,
+        releaseUrl: release.html_url,
+        items
+    };
+};
diff --git a/website/src/_data/nightly.js b/website/src/_data/nightly.js
new file mode 100644
index 0000000..a8d10b3
--- /dev/null
+++ b/website/src/_data/nightly.js
@@ -0,0 +1,191 @@
+const REPO = "praktimarc/kst4contest";
+const API = `https://api.github.com/repos/${REPO}`;
+const WORKFLOW_FILE = "nightly-artifacts.yml";
+const WORKFLOW_BASENAME = "nightly-artifacts";
+const BRANCH = "main";
+const WORKFLOW_RUNS_URL = `https://github.com/${REPO}/actions/workflows/${WORKFLOW_FILE}`;
+
+/**
+ * nightly.link (https://nightly.link) mirrors the most recent successful
+ * GitHub Actions artifact for a given workflow/branch/artifact-name as a
+ * plain public download, with no GitHub account required. It always follows
+ * the latest successful run on its own, so these URLs stay correct without
+ * this site having to resolve a run ID at build time.
+ */
+const NIGHTLY_LINK_BASE = `https://nightly.link/${REPO}/workflows/${WORKFLOW_BASENAME}/${BRANCH}`;
+
+/**
+ * Static metadata for the artifacts produced by
+ * .github/workflows/nightly-artifacts.yml, keyed by the upload-artifact name
+ * used in that workflow. Anything not listed here (e.g. the raw
+ * flatpak-ostree-repo folder) is skipped on the nightly page.
+ */
+const ARTIFACT_INFO = {
+    "windows-zip": {
+        os: "Windows",
+        format: "ZIP x64",
+        icon: "🪟",
+        note: "Extract the archive, then start praktiKST.exe. No separate Java installation is required.",
+        order: 1
+    },
+    "linux-appimage": {
+        os: "Linux",
+        format: "AppImage x86_64",
+        icon: "🐧",
+        note: "Portable build. Make the downloaded file executable before the first launch.",
+        order: 2
+    },
+    flatpakref: {
+        os: "Linux",
+        format: "Flatpak (.flatpakref, nightly branch)",
+        icon: "🐧",
+        note: "Adds the nightly branch of the KST4Contest Flatpak repo. See the installation guide for the flatpak CLI alternative.",
+        order: 3
+    },
+    "linux-debian": {
+        os: "Debian / Ubuntu",
+        format: "DEB amd64",
+        icon: "📦",
+        note: "Native package for Debian, Ubuntu and distributions based on them.",
+        order: 4
+    },
+    "linux-fedora": {
+        os: "Fedora",
+        format: "RPM x86_64",
+        icon: "📦",
+        note: "Native package built for Fedora and compatible RPM-based systems.",
+        order: 5
+    },
+    "linux-arch": {
+        os: "Arch Linux",
+        format: "pkg.tar.zst",
+        icon: "📦",
+        note: "Package for direct installation with pacman.",
+        order: 6
+    },
+    "macos-dmg-macos-latest": {
+        os: "macOS Apple Silicon",
+        format: "DMG arm64",
+        icon: "🍎",
+        note: "Best-effort build for Apple Silicon Macs. Not notarized by Apple.",
+        order: 7
+    },
+    "macos-dmg-macos-15-intel": {
+        os: "macOS Intel",
+        format: "DMG x86_64",
+        icon: "🍎",
+        note: "Best-effort build for Intel Macs. Not notarized by Apple.",
+        order: 8
+    }
+};
+
+function buildItems() {
+    return Object.entries(ARTIFACT_INFO)
+        .map(([name, info]) => ({
+            ...info,
+            name,
+            url: `${NIGHTLY_LINK_BASE}/${name}.zip`
+        }))
+        .sort((a, b) => a.order - b.order);
+}
+
+function authHeaders() {
+    const headers = { Accept: "application/vnd.github+json" };
+
+    if (process.env.GITHUB_TOKEN) {
+        headers.Authorization = `Bearer ${process.env.GITHUB_TOKEN}`;
+    }
+
+    return headers;
+}
+
+function formatSize(bytes) {
+    if (bytes < 1024 * 1024) {
+        return `${(bytes / 1024).toFixed(0)} KB`;
+    }
+
+    return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
+}
+
+/**
+ * Best-effort lookup of the run behind the current nightly.link downloads,
+ * purely to show a commit/date on the page. The download links themselves
+ * (buildItems) do not depend on this succeeding.
+ */
+async function fetchLatestRunMeta(headers) {
+    const runsRes = await fetch(
+        `${API}/actions/workflows/${WORKFLOW_FILE}/runs?branch=${BRANCH}&status=success&per_page=1`,
+        { headers }
+    );
+
+    if (!runsRes.ok) {
+        throw new Error(`workflow runs request failed: ${runsRes.status}`);
+    }
+
+    const runsData = await runsRes.json();
+    const run = runsData.workflow_runs && runsData.workflow_runs[0];
+
+    if (!run) {
+        throw new Error("no successful nightly run found");
+    }
+
+    const meta = {
+        runUrl: run.html_url,
+        commitUrl: `https://github.com/${REPO}/commit/${run.head_sha}`,
+        shortSha: run.head_sha.slice(0, 7),
+        createdAt: run.created_at
+    };
+
+    try {
+        const artifactsRes = await fetch(
+            `${API}/actions/runs/${run.id}/artifacts?per_page=100`,
+            { headers }
+        );
+
+        if (artifactsRes.ok) {
+            const artifactsData = await artifactsRes.json();
+            const sizeByName = {};
+
+            for (const artifact of artifactsData.artifacts || []) {
+                if (!artifact.expired) {
+                    sizeByName[artifact.name] = formatSize(artifact.size_in_bytes);
+                }
+            }
+
+            meta.sizeByName = sizeByName;
+        }
+    } catch {
+        // Sizes are a nice-to-have; the run metadata above is still useful without them.
+    }
+
+    return meta;
+}
+
+module.exports = async function () {
+    const items = buildItems();
+
+    let meta = null;
+
+    try {
+        meta = await fetchLatestRunMeta(authHeaders());
+    } catch (err) {
+        console.warn(
+            `[nightly] Could not load latest nightly run metadata (commit/date will be omitted). ` +
+            `Download links are unaffected since they are served by nightly.link: ${err.message}`
+        );
+    }
+
+    if (meta && meta.sizeByName) {
+        for (const item of items) {
+            if (meta.sizeByName[item.name]) {
+                item.size = meta.sizeByName[item.name];
+            }
+        }
+    }
+
+    return {
+        runsUrl: WORKFLOW_RUNS_URL,
+        meta,
+        items
+    };
+};
diff --git a/website/src/assets/css/main.css b/website/src/assets/css/main.css
index 4e5d0cb..119a985 100644
--- a/website/src/assets/css/main.css
+++ b/website/src/assets/css/main.css
@@ -10,6 +10,8 @@
     --accent: #38bdf8;
     --accent2: #a855f7;
     --accent3: #22c55e;
+    --warn: #f59e0b;
+    --danger: #f43f5e;
     --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
 }
 
@@ -259,6 +261,7 @@ a:hover {
     color: #020617;
     background: linear-gradient(135deg, var(--accent), var(--accent2));
     font-weight: 800;
+    cursor: pointer;
     box-shadow:
             0 16px 44px rgba(56, 189, 248, 0.25),
             inset 0 1px 0 rgba(255, 255, 255, 0.35);
@@ -463,6 +466,181 @@ a:hover {
     min-height: 220px;
 }
 
+.channel-picker {
+    margin: 34px 0 0;
+}
+
+.channel-switch {
+    display: inline-flex;
+    gap: 4px;
+    padding: 5px;
+    margin: 0 0 40px;
+    border: 1px solid var(--border);
+    border-radius: 999px;
+    background: rgba(2, 6, 23, 0.55);
+}
+
+.channel-option {
+    position: relative;
+    display: inline-flex;
+}
+
+.channel-option input {
+    position: absolute;
+    width: 1px;
+    height: 1px;
+    padding: 0;
+    margin: -1px;
+    overflow: hidden;
+    clip: rect(0, 0, 0, 0);
+    white-space: nowrap;
+    border: 0;
+}
+
+.channel-option span {
+    display: inline-flex;
+    align-items: center;
+    gap: 8px;
+    padding: 11px 22px;
+    border-radius: 999px;
+    font-weight: 800;
+    color: var(--muted);
+    cursor: pointer;
+    transition: color 0.15s ease;
+}
+
+.channel-option input:checked + span {
+    color: #020617;
+    background: linear-gradient(135deg, var(--accent), var(--accent2));
+    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.25);
+}
+
+.channel-option input:focus-visible + span {
+    outline: 2px solid var(--accent);
+    outline-offset: 2px;
+}
+
+.channel-panel {
+    display: none;
+}
+
+.channel-picker:has(#channel-stable:checked) .channel-panel[data-channel="stable"],
+.channel-picker:has(#channel-beta:checked) .channel-panel[data-channel="beta"],
+.channel-picker:has(#channel-nightly:checked) .channel-panel[data-channel="nightly"] {
+    display: block;
+}
+
+.notice-banner {
+    display: flex;
+    gap: 18px;
+    align-items: flex-start;
+    padding: clamp(18px, 3vw, 26px);
+    margin-bottom: 30px;
+    border: 1px solid var(--warn);
+    border-radius: 20px;
+    background: linear-gradient(180deg, rgba(245, 158, 11, 0.14), rgba(245, 158, 11, 0.04));
+}
+
+.notice-banner .disclaimer-icon {
+    font-size: 2rem;
+}
+
+.notice-banner h3 {
+    margin: 0 0 6px;
+    font-size: 1.1rem;
+    color: #fde68a;
+}
+
+.notice-banner p {
+    margin: 0;
+    color: var(--muted);
+}
+
+.empty-state {
+    text-align: center;
+    padding: clamp(30px, 5vw, 54px);
+}
+
+.empty-state .disclaimer-icon {
+    font-size: 2.4rem;
+    margin-bottom: 12px;
+}
+
+.empty-state h3 {
+    margin: 0 0 10px;
+}
+
+.empty-state p {
+    color: var(--muted);
+    max-width: 560px;
+    margin: 0 auto;
+}
+
+.empty-state .actions {
+    justify-content: center;
+}
+
+.disclaimer-banner {
+    display: flex;
+    gap: 20px;
+    align-items: flex-start;
+    padding: clamp(22px, 4vw, 34px);
+    margin-bottom: 34px;
+    border: 2px solid var(--danger);
+    border-radius: 22px;
+    background: linear-gradient(180deg, rgba(244, 63, 94, 0.16), rgba(244, 63, 94, 0.05));
+    box-shadow: 0 0 40px rgba(244, 63, 94, 0.16);
+}
+
+.disclaimer-icon {
+    flex: none;
+    font-size: 2.6rem;
+    line-height: 1;
+}
+
+.disclaimer-banner h3 {
+    margin: 0 0 8px;
+    font-size: 1.35rem;
+    color: #fecdd3;
+}
+
+.disclaimer-banner p {
+    margin: 0;
+    color: var(--text);
+}
+
+.disclaimer-banner p + p {
+    margin-top: 10px;
+    color: var(--muted);
+}
+
+.disclaimer-banner .inline-link {
+    color: #fecdd3;
+    text-decoration: underline;
+    cursor: pointer;
+    font-weight: 700;
+}
+
+.sr-only {
+    position: absolute;
+    width: 1px;
+    height: 1px;
+    padding: 0;
+    margin: -1px;
+    overflow: hidden;
+    clip: rect(0, 0, 0, 0);
+    white-space: nowrap;
+    border: 0;
+}
+
+.channel-panel .section-heading + .actions {
+    margin: -10px 0 30px;
+}
+
+.channel-panel .content-card {
+    margin-top: 30px;
+}
+
 .screenshot-placeholder {
     display: grid;
     place-items: center;
@@ -491,14 +669,14 @@ a:hover {
     line-height: 1.2;
 }
 
-.manual-content pre {
+pre {
     overflow-x: auto;
     padding: 16px;
     border-radius: 14px;
     background: #020617;
 }
 
-.manual-content code {
+code {
     color: #bae6fd;
 }
 
diff --git a/website/src/download/index.njk b/website/src/download/index.njk
index 4e79e5a..d7287be 100644
--- a/website/src/download/index.njk
+++ b/website/src/download/index.njk
@@ -1,45 +1,214 @@
 ---
 layout: base.njk
 title: Download KST4Contest
-description: Download the latest stable KST4Contest packages for Windows, Linux and macOS. The required Java runtime is included.
+description: Download the latest stable KST4Contest packages for Windows, Linux and macOS, or switch to a nightly build for testing. The required Java runtime is included.
 ---
 
 <section class="hero">
-  <p class="badge">Stable release</p>
+  <p class="badge">Stable, Beta &amp; Nightly channels</p>
   <h1>Download KST4Contest</h1>
   <p class="lead">
-    Choose the package for your operating system. Official builds are published through GitHub Releases,
-    and the required Java runtime is already included.
+    Choose the package for your operating system. The required Java runtime is already included. Use
+    the switch below to pick between the Stable release, Beta and current Nightly builds.
   </p>
-
-  <div class="actions">
-    <a class="button" href="https://github.com/praktimarc/kst4contest/releases/latest">Latest release on GitHub</a>
-    <a class="button secondary" href="https://github.com/praktimarc/kst4contest/releases">All releases</a>
-  </div>
 </section>
 
 <section class="section">
-  <div class="section-heading">
-    <p class="eyebrow">Packages by platform</p>
-    <h2>Choose the format that fits your system</h2>
-  </div>
+  <div class="channel-picker">
+    <fieldset class="channel-switch">
+      <legend class="sr-only">Choose a build channel</legend>
+      <label class="channel-option">
+        <input type="radio" name="channel" id="channel-stable" checked>
+        <span>Stable release</span>
+      </label>
+      <label class="channel-option">
+        <input type="radio" name="channel" id="channel-beta">
+        <span>Beta{% if beta.available %} · {{ beta.tag }}{% endif %}</span>
+      </label>
+      <label class="channel-option">
+        <input type="radio" name="channel" id="channel-nightly">
+        <span>Nightly builds</span>
+      </label>
+    </fieldset>
 
-  <div class="grid">
-    {% for item in downloads %}
-      <article class="card download-card">
-        <div class="feature-icon">{{ item.icon }}</div>
+    <div class="channel-panel" data-channel="stable">
+      <div class="section-heading">
+        <p class="eyebrow">Packages by platform</p>
+        <h2>Choose the format that fits your system</h2>
+      </div>
 
-        {% if item.recommended %}
-          <p class="badge">Default choice</p>
-        {% endif %}
+      <div class="actions">
+        <a class="button" href="https://github.com/praktimarc/kst4contest/releases/latest">Latest release on GitHub</a>
+        <a class="button secondary" href="https://github.com/praktimarc/kst4contest/releases">All releases</a>
+      </div>
 
-        <h3>{{ item.os }}</h3>
-        <p><strong>{{ item.format }}</strong></p>
-        <p>{{ item.note }}</p>
+      <div class="grid">
+        {% for item in downloads %}
+          <article class="card download-card">
+            <div class="feature-icon">{{ item.icon }}</div>
 
-        <a class="button secondary" href="{{ item.url }}">Download →</a>
-      </article>
-    {% endfor %}
+            {% if item.recommended %}
+              <p class="badge">Default choice</p>
+            {% endif %}
+
+            <h3>{{ item.os }}</h3>
+            <p><strong>{{ item.format }}</strong></p>
+            <p>{{ item.note }}</p>
+
+            <a class="button secondary" href="{{ item.url }}">Download →</a>
+          </article>
+        {% endfor %}
+      </div>
+    </div>
+
+    <div class="channel-panel" data-channel="beta">
+      {% if beta.available %}
+        <div class="notice-banner">
+          <div class="disclaimer-icon" aria-hidden="true">🧪</div>
+          <div>
+            <h3>Pre-release — do a quick check before a contest</h3>
+            <p>
+              Beta builds have a largely defined feature set and are used for focused testing ahead of
+              a Stable release. They can still contain new defects. If you plan to use one on contest
+              day, try it beforehand.
+            </p>
+          </div>
+        </div>
+
+        <div class="section-heading">
+          <p class="eyebrow">Current beta</p>
+          <h2>{{ beta.name or beta.tag }} · {{ beta.publishedAt | dateToIso }}</h2>
+        </div>
+        <p class="lead">
+          <a href="{{ beta.releaseUrl }}">View this release on GitHub</a>
+        </p>
+
+        <div class="grid">
+          {% for item in beta.items %}
+            <article class="card download-card">
+              <div class="feature-icon">{{ item.icon }}</div>
+
+              <h3>{{ item.os }}</h3>
+              <p><strong>{{ item.format }}</strong></p>
+              <p>{{ item.note }}</p>
+
+              <a class="button secondary" href="{{ item.url }}">Download →</a>
+            </article>
+          {% endfor %}
+        </div>
+
+        <div class="card content-card">
+          <h3>Flatpak beta channel</h3>
+          <p>
+            Instead of the .flatpakref download above, Flatpak users can also track the beta channel
+            directly through the CLI once the Stable repo is already added:
+          </p>
+          <pre><code>flatpak install kst4contest de.x08.KST4Contest//beta</code></pre>
+          <p>
+            See the <a href="/manual/en/installation/">installation guide</a> for the full Flatpak setup.
+          </p>
+        </div>
+      {% else %}
+        <div class="card content-card empty-state">
+          <div class="disclaimer-icon" aria-hidden="true">🧪</div>
+          <h3>No Beta build right now</h3>
+          <p>
+            There is currently no Beta release. Beta builds are published occasionally for focused
+            testing ahead of a Stable release, tagged separately from Nightly builds. Check back later,
+            or use the Stable release or a Nightly build in the meantime.
+          </p>
+          <div class="actions">
+            <label for="channel-stable" class="button secondary">Switch to Stable</label>
+            <label for="channel-nightly" class="button ghost">Switch to Nightly</label>
+            <a class="button ghost" href="{{ beta.releasesUrl }}">All releases on GitHub</a>
+          </div>
+        </div>
+      {% endif %}
+    </div>
+
+    <div class="channel-panel" data-channel="nightly">
+      <div class="disclaimer-banner">
+        <div class="disclaimer-icon" aria-hidden="true">⚠️</div>
+        <div>
+          <h3>Testing only — not for contest operation</h3>
+          <p>
+            Nightly builds are automated, unreviewed snapshots of the <code>main</code> branch. They can
+            be unstable, contain unfinished features, break your settings or corrupt log data. Do not
+            rely on a nightly build during a contest.
+          </p>
+          <p>
+            Use the <label for="channel-stable" class="inline-link">Stable release</label> for actual
+            operation. Nightly builds exist to test a specific fix or feature ahead of the next release.
+          </p>
+        </div>
+      </div>
+
+      <div class="section-heading">
+        <p class="eyebrow">
+          {% if nightly.meta %}
+            Latest successful build
+          {% else %}
+            Current nightly build
+          {% endif %}
+        </p>
+        <h2>
+          {% if nightly.meta %}
+            Build {{ nightly.meta.shortSha }} · {{ nightly.meta.createdAt | dateToIso }}
+          {% else %}
+            Always points to the newest successful workflow run
+          {% endif %}
+        </h2>
+      </div>
+
+      {% if nightly.meta %}
+        <p class="lead">
+          From commit <a href="{{ nightly.meta.commitUrl }}"><code>{{ nightly.meta.shortSha }}</code></a> ·
+          <a href="{{ nightly.meta.runUrl }}">view this workflow run on GitHub</a>
+        </p>
+      {% else %}
+        <p class="lead">
+          Commit and date details could not be loaded when this page was built. The download links below
+          are unaffected — nightly.link always resolves to the latest successful run on its own.
+        </p>
+      {% endif %}
+
+      <div class="grid">
+        {% for item in nightly.items %}
+          <article class="card download-card">
+            <div class="feature-icon">{{ item.icon }}</div>
+
+            <h3>{{ item.os }}</h3>
+            <p><strong>{{ item.format }}</strong></p>
+            <p>{{ item.note }}</p>
+            {% if item.size %}<p><small>{{ item.size }}</small></p>{% endif %}
+
+            <a class="button secondary" href="{{ item.url }}">Download →</a>
+          </article>
+        {% endfor %}
+      </div>
+
+      <div class="card content-card">
+        <h3>How these downloads work</h3>
+        <p>
+          GitHub Actions build artifacts normally require a signed-in GitHub account to download. The
+          links above go through <a href="https://nightly.link/">nightly.link</a>, a public, open-source
+          proxy that mirrors the most recent successful build with no login required. Each link downloads
+          a <code>.zip</code> file; the actual installer, package or AppImage is inside and needs to be
+          extracted once.
+        </p>
+        <p>
+          Instead of the .flatpakref download, Flatpak users can also track the nightly channel directly
+          through the CLI once the Stable or Beta repo is already added:
+        </p>
+        <pre><code>flatpak install kst4contest de.x08.KST4Contest//nightly</code></pre>
+        <p>
+          See the <a href="/manual/en/installation/">installation guide</a> for how the Stable, Beta and
+          Nightly channels relate to each other, and for the full Flatpak setup. Older or in-progress
+          builds can be browsed on the
+          <a href="{{ nightly.runsUrl }}">nightly workflow run list on GitHub</a>.
+        </p>
+      </div>
+    </div>
   </div>
 </section>
 
@@ -77,4 +246,10 @@ description: Download the latest stable KST4Contest packages for Windows, Linux
       <a class="button" href="/support/">Support the project</a>
     </div>
   </div>
-</section>
\ No newline at end of file
+</section>
+
+<script>
+  var channelTabByHash = { "#beta": "channel-beta", "#nightly": "channel-nightly" };
+  var channelTab = document.getElementById(channelTabByHash[location.hash]);
+  if (channelTab) { channelTab.checked = true; }
+</script>