From 64e56e8abc73820729402de3d6151aaacb30e43c Mon Sep 17 00:00:00 2001
From: Archicratia <area.technik@proton.me>
Date: Sat, 25 Apr 2026 01:31:14 +0200
Subject: [PATCH] =?UTF-8?q?feat(ui):=20harmoniser=20navigation=20pages=20d?=
 =?UTF-8?q?=E2=80=99entr=C3=A9e=20et=20recherche?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/components/EditionToc.astro    |  22 +-
 src/components/LocalToc.astro      |  31 ++-
 src/components/SiteNav.astro       |  20 +-
 src/layouts/EditionLayout.astro    | 212 ++++++++-------
 src/pages/archicrat-ia/index.astro |  67 ++++-
 src/pages/cas-ia/index.astro       |  73 ++++-
 src/pages/commencer/index.astro    |  17 +-
 src/pages/index.astro              | 101 ++++---
 src/pages/recherche/index.astro    | 132 +++++----
 src/styles/global.css              | 414 ++++++++++++++++++++++++++++-
 10 files changed, 835 insertions(+), 254 deletions(-)

diff --git a/src/components/EditionToc.astro b/src/components/EditionToc.astro
index 33d84d0..ba7e771 100644
--- a/src/components/EditionToc.astro
+++ b/src/components/EditionToc.astro
@@ -28,6 +28,7 @@ const tocId = `toc-global-${collection}-${String(basePath).replace(/[^\w-]+/g, "
 
 <nav
   class="toc-global"
+  data-mobile-default="closed"
   aria-label={label}
   data-toc-global
   data-toc-key={`global:${collection}:${basePath}`}
@@ -35,14 +36,14 @@ const tocId = `toc-global-${collection}-${String(basePath).replace(/[^\w-]+/g, "
   <button
     class="toc-global__head toc-global__toggle"
     type="button"
-    aria-expanded="true"
+    aria-expanded="false"
     aria-controls={tocId}
   >
     <span class="toc-global__title">{label}</span>
     <span class="toc-global__chevron" aria-hidden="true">▾</span>
   </button>
 
-  <div class="toc-global__body-clip" id={tocId}>
+  <div class="toc-global__body-clip" id={tocId} hidden>
     <div class="toc-global__body">
       <ol class="toc-global__list">
         {entries.map((e) => {
@@ -291,6 +292,10 @@ const tocId = `toc-global-${collection}-${String(basePath).replace(/[^\w-]+/g, "
       max-height: min(42vh, 360px);
       padding-right: 4px;
     }
+
+    .toc-global__body-clip[hidden]{
+      display: none !important;
+    }
   }
 
   @media (prefers-color-scheme: dark){
@@ -332,9 +337,16 @@ const tocId = `toc-global-${collection}-${String(basePath).replace(/[^\w-]+/g, "
 
       const setOpen = (open, { persist = true } = {}) => {
         const isMobile = mq.matches;
-        nav.classList.toggle("is-collapsed", isMobile && !open);
-        toggle.setAttribute("aria-expanded", open ? "true" : "false");
-        if (persist && isMobile) write(open);
+        const effectiveOpen = isMobile ? open : true;
+
+        nav.classList.toggle("is-collapsed", isMobile && !effectiveOpen);
+        toggle.setAttribute("aria-expanded", effectiveOpen ? "true" : "false");
+
+        if (bodyClip) {
+          bodyClip.hidden = isMobile && !effectiveOpen;
+        }
+
+        if (persist && isMobile) write(effectiveOpen);
       };
 
       const initState = () => {
diff --git a/src/components/LocalToc.astro b/src/components/LocalToc.astro
index 80701c3..7740cd1 100644
--- a/src/components/LocalToc.astro
+++ b/src/components/LocalToc.astro
@@ -7,18 +7,18 @@ const tocId = `toc-local-${Math.random().toString(36).slice(2, 9)}`;
 ---
 
 {items.length > 0 && (
-  <nav class="toc-local" aria-label="Dans ce chapitre" data-toc-local>
+  <nav class="toc-local" aria-label="Dans ce chapitre" data-toc-local data-mobile-default="closed">
     <button
       class="toc-local__head toc-local__toggle"
       type="button"
-      aria-expanded="true"
+      aria-expanded="false"
       aria-controls={tocId}
     >
       <span class="toc-local__title">Dans ce chapitre</span>
       <span class="toc-local__chevron" aria-hidden="true">▾</span>
     </button>
 
-    <div class="toc-local__body-clip" id={tocId}>
+    <div class="toc-local__body-clip" id={tocId} hidden>
       <div class="toc-local__body">
         <ol class="toc-local__list">
           {items.map((h) => (
@@ -69,12 +69,18 @@ const tocId = `toc-local-${Math.random().toString(36).slice(2, 9)}`;
 
     const setOpen = (open, { persist = true, emit = true } = {}) => {
       const isMobile = mq.matches;
-      toc.classList.toggle("is-collapsed", isMobile && !open);
-      toggle.setAttribute("aria-expanded", open ? "true" : "false");
+      const effectiveOpen = isMobile ? open : true;
 
-      if (persist && isMobile) writeState(open);
+      toc.classList.toggle("is-collapsed", isMobile && !effectiveOpen);
+      toggle.setAttribute("aria-expanded", effectiveOpen ? "true" : "false");
 
-      if (emit && open && isMobile) {
+      if (bodyClip) {
+        bodyClip.hidden = isMobile && !effectiveOpen;
+      }
+
+      if (persist && isMobile) writeState(effectiveOpen);
+
+      if (emit && effectiveOpen && isMobile) {
         window.dispatchEvent(new CustomEvent("archicratie:tocLocalOpen"));
       }
     };
@@ -85,7 +91,7 @@ const tocId = `toc-local-${Math.random().toString(36).slice(2, 9)}`;
         return;
       }
       const stored = readState();
-      setOpen(stored == null ? true : stored, { persist: false, emit: false });
+      setOpen(stored == null ? false : stored, { persist: false, emit: false });
     };
 
     toggle.addEventListener("click", () => {
@@ -162,7 +168,8 @@ const tocId = `toc-local-${Math.random().toString(36).slice(2, 9)}`;
       t.a.setAttribute("aria-current", "true");
       t.li.classList.add("is-current");
 
-      if (mq.matches && autoOpen && toc.classList.contains("is-collapsed")) {
+      // Sur mobile/tablette, le suivi actif ne doit pas rouvrir automatiquement la TOC.
+      if (!mq.matches && autoOpen && toc.classList.contains("is-collapsed")) {
         setOpen(true);
       }
 
@@ -216,7 +223,7 @@ const tocId = `toc-local-${Math.random().toString(36).slice(2, 9)}`;
 
       const el = document.getElementById(id);
       if (el) openDetailsIfNeeded(el);
-      setCurrent(id, { autoOpen: true });
+      setCurrent(id, { autoOpen: false });
     };
 
     toc.addEventListener("click", (ev) => {
@@ -427,5 +434,9 @@ const tocId = `toc-local-${Math.random().toString(36).slice(2, 9)}`;
       margin-top: .42em;
       opacity: .55;
     }
+
+    .toc-local__body-clip[hidden]{
+      display: none !important;
+    }
   }
 </style>
\ No newline at end of file
diff --git a/src/components/SiteNav.astro b/src/components/SiteNav.astro
index 190aa5f..9a38977 100644
--- a/src/components/SiteNav.astro
+++ b/src/components/SiteNav.astro
@@ -1,17 +1,15 @@
 <nav class="site-nav" aria-label="Navigation principale">
+  <a href="/">Accueil</a>
+  <span aria-hidden="true"> · </span>
 
-<a href="/">Accueil</a>
-<span aria-hidden="true"> · </span>
+  <a href="/archicrat-ia/">Essai-thèse — ArchiCraT-IA</a>
+  <span aria-hidden="true"> · </span>
 
-<a href="/archicrat-ia/">Essai-thèse</a>
-<span aria-hidden="true"> · </span>
+  <a href="/cas-ia/">Cas pratique — Gouvernance IA</a>
+  <span aria-hidden="true"> · </span>
 
-<a href="/cas-ia/">Cas IA</a>
-<span aria-hidden="true"> · </span>
-
-<a href="/glossaire/">Glossaire</a>
-<span aria-hidden="true"> · </span>
-
-<a href="/recherche/">Recherche</a>
+  <a href="/glossaire/">Glossaire</a>
+  <span aria-hidden="true"> · </span>
 
+  <a href="/recherche/">Recherche</a>
 </nav>
\ No newline at end of file
diff --git a/src/layouts/EditionLayout.astro b/src/layouts/EditionLayout.astro
index a84364f..57beaed 100644
--- a/src/layouts/EditionLayout.astro
+++ b/src/layouts/EditionLayout.astro
@@ -184,7 +184,8 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
       .catch(() => Boolean(__DEV__));
   }
 })();
-    </script>
+    
+</script>
   </head>
 
   <body
@@ -665,6 +666,40 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
         }
       }
 
+      @media (orientation: landscape) and (min-width: 981px) and (max-width: 1220px) and (pointer: coarse){
+        .page{
+          padding-left: 10px;
+          padding-right: 10px;
+        }
+
+        .page-shell{
+          --aside-w: 300px;
+          --gap: 14px;
+          max-width: calc(100vw - 20px) !important;
+          grid-template-columns: minmax(260px, var(--aside-w)) minmax(0, 1fr) !important;
+        }
+
+        .reading{
+          max-width: none !important;
+          width: 100% !important;
+          min-width: 0 !important;
+          margin: 0 !important;
+        }
+
+        :global(.reading p[id^="p-"]){
+          padding-right: 108px;
+        }
+
+        :global(.para-tools){
+          right: 0;
+        }
+
+        :global(.para-tools-actions){
+          flex-wrap: wrap;
+          justify-content: flex-end;
+        }
+      }
+
       @media (prefers-color-scheme: dark){
         :global(body[data-edition-key="glossaire"][data-sticky-mode="glossary-portal"] #reading-follow .reading-follow__inner){
           background: rgba(0,0,0,.6);
@@ -957,7 +992,7 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
         }
       }
 
-            .mobile-para-menu{
+      .mobile-para-menu{
         position: fixed;
         inset: auto 10px 10px 10px;
         z-index: 120;
@@ -1009,7 +1044,7 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
         transform: translateY(1px);
       }
 
-            .mobile-para-menu{
+      .mobile-para-menu{
         touch-action: manipulation;
       }
 
@@ -1082,6 +1117,7 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
   const docEditionKey = document.body?.dataset?.editionKey || "";
   const docStickyMode = String(document.body?.dataset?.stickyMode || "default");
   const isGlossaryEdition = docEditionKey === "glossaire";
+  const isIntroEdition = docEditionKey === "commencer";
 
   const hasLocalGlossaryFollow =
     isGlossaryEdition && Boolean(document.getElementById("glossary-hero-follow"));
@@ -1501,45 +1537,45 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
   }
 
   function updateResumeButton() {
-  const btn = document.getElementById("resume-btn");
-  if (!btn) return;
+    const btn = document.getElementById("resume-btn");
+    if (!btn) return;
 
-  const current = getResumeBookmark();
+    const current = getResumeBookmark();
 
-  btn.hidden = false;
-  btn.setAttribute("href", "#");
+    btn.hidden = false;
+    btn.setAttribute("href", "#");
 
-  if (!current) {
-    delete btn.dataset.resumeAnchor;
-    delete btn.dataset.resumePath;
-    delete btn.dataset.resumeKind;
-    btn.setAttribute("aria-disabled", "true");
-    btn.classList.add("is-disabled");
-    btn.title = "Aucun marque-page explicite enregistré";
-    return;
+    if (!current) {
+      delete btn.dataset.resumeAnchor;
+      delete btn.dataset.resumePath;
+      delete btn.dataset.resumeKind;
+      btn.setAttribute("aria-disabled", "true");
+      btn.classList.add("is-disabled");
+      btn.title = "Aucun marque-page explicite enregistré";
+      return;
+    }
+
+    btn.dataset.resumeAnchor = current.anchor;
+    btn.dataset.resumePath = current.path || "";
+    btn.dataset.resumeKind = current.kind || "explicit-bookmark";
+    btn.setAttribute("aria-disabled", "false");
+    btn.classList.remove("is-disabled");
+    btn.title = `Reprendre : ${current.anchor}`;
+
+    if (!__resumeClickBound) {
+      __resumeClickBound = true;
+
+      btn.addEventListener("click", (ev) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        if (btn.getAttribute("aria-disabled") === "true") return;
+
+        performResume();
+      }, { passive: false });
+    }
   }
 
-  btn.dataset.resumeAnchor = current.anchor;
-  btn.dataset.resumePath = current.path || "";
-  btn.dataset.resumeKind = current.kind || "explicit-bookmark";
-  btn.setAttribute("aria-disabled", "false");
-  btn.classList.remove("is-disabled");
-  btn.title = `Reprendre : ${current.anchor}`;
-
-  if (!__resumeClickBound) {
-    __resumeClickBound = true;
-
-    btn.addEventListener("click", (ev) => {
-      ev.preventDefault();
-      ev.stopPropagation();
-
-      if (btn.getAttribute("aria-disabled") === "true") return;
-
-      performResume();
-    }, { passive: false });
-  }
-}
-
   window.__archiUpdateResumeButton = updateResumeButton;
 
   if (window.location.search.includes("body=")) {
@@ -1858,7 +1894,7 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
   }
 
   safe("para-tools", () => {
-    if (isGlossaryEdition) return;
+    if (isGlossaryEdition || isIntroEdition) return;
 
     for (const p of parasAll) {
       if (p.querySelector(".para-tools")) continue;
@@ -1961,7 +1997,7 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
   });
 
   safe("mobile-para-tools", () => {
-    if (isGlossaryEdition) return;
+    if (isGlossaryEdition || isIntroEdition) return;
     if (!reading) return;
 
     const isMobileLike = () =>
@@ -1985,8 +2021,12 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
     let menuOpen = false;
     let touchLongPressActive = false;
 
-    const LONG_PRESS_DELAY = 460;
-    const LONG_PRESS_MOVE_TOLERANCE = 18;
+    const LONG_PRESS_DELAY = 520;
+    const isTabletLike = () =>
+      window.matchMedia("(pointer: coarse)").matches &&
+      Math.min(window.innerWidth, window.innerHeight) >= 700;
+
+    const getMoveTolerance = () => isTabletLike() ? 42 : 22;
 
     function isInteractiveTarget(node) {
       const el = node?.closest?.(
@@ -2029,7 +2069,12 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
     function movedTooFar(x, y) {
       const dx = Math.abs(Number(x || 0) - pressStartX);
       const dy = Math.abs(Number(y || 0) - pressStartY);
-      return dx > LONG_PRESS_MOVE_TOLERANCE || dy > LONG_PRESS_MOVE_TOLERANCE;
+      const tol = getMoveTolerance();
+
+      // iPad/tablette : on tolère mieux la dérive verticale naturelle du doigt.
+      if (isTabletLike()) return dx > tol || dy > (tol * 1.65);
+
+      return dx > tol || dy > tol;
     }
 
     function closeMenu() {
@@ -2118,13 +2163,10 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
       }
     }
 
-    function handlePressEnd() {
-      cancelLongPress();
-    }
-
     function handlePressEnd() {
       clearPressTimer();
       pressPointerId = null;
+      touchLongPressActive = false;
     }
 
     reading.addEventListener("pointerdown", handlePressStart, { passive: true });
@@ -2162,15 +2204,17 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
       cancelLongPress();
     }, { passive: true });
 
-    window.addEventListener("scroll", () => {
-      clearPressTimer();
-      if (menuOpen) closeMenu();
-    }, { passive: true });
+    function handleScrollDuringMobileMenu() {
+      // Tant que le timer long-press est en cours, ne pas l'annuler brutalement
+      // sur tablette : iPadOS peut produire un micro-scroll fantôme.
+      if (pressTimer && isTabletLike()) return;
 
-    document.addEventListener("scroll", () => {
       clearPressTimer();
       if (menuOpen) closeMenu();
-    }, { passive: true, capture: true });
+    }
+
+    window.addEventListener("scroll", handleScrollDuringMobileMenu, { passive: true });
+    document.addEventListener("scroll", handleScrollDuringMobileMenu, { passive: true, capture: true });
 
     document.addEventListener("click", (ev) => {
       const p = ev.target?.closest?.('.reading p[id^="p-"]');
@@ -2559,6 +2603,14 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
       nav.classList.toggle("is-collapsed", !open);
       toggle.setAttribute("aria-expanded", open ? "true" : "false");
 
+      const bodyClip =
+        nav.querySelector(".toc-global__body-clip") ||
+        nav.querySelector(".toc-local__body-clip");
+
+      if (bodyClip) {
+        bodyClip.hidden = !open;
+      }
+
       const key = nav.dataset.tocKey
         ? `archicratie:${nav.dataset.tocKey || ""}`
         : nav.classList.contains("toc-local")
@@ -2580,9 +2632,16 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
     }
 
     function syncAutoCollapse() {
-      const shouldOpen = nearTopZone();
+      // Sur mobile/tablette, les TOC restent fermées par défaut.
+      // Elles ne s’ouvrent que par action explicite utilisateur.
+      if (mqCompact.matches) {
+        setTocOpen(tocGlobal, false, false);
+        setTocOpen(tocLocal, false, false);
+        return;
+      }
 
-      // En desktop comme en mobile : TOC ouverts en haut, repliés dès qu’on quitte le haut.
+      // Desktop : comportement historique conservé.
+      const shouldOpen = nearTopZone();
       setTocOpen(tocGlobal, shouldOpen, false);
       setTocOpen(tocLocal, shouldOpen, false);
     }
@@ -2607,45 +2666,12 @@ const WHOAMI_FORCE_LOCALHOST = (import.meta.env.PUBLIC_WHOAMI_FORCE_LOCALHOST ??
     schedule();
   });
 
-  safe("mobile-toc-collapse", () => {
-    const isMobile = () => window.innerWidth <= 760;
-
-    const bindToggle = (rootSel, headSel) => {
-      document.querySelectorAll(rootSel).forEach((box) => {
-        const head = box.querySelector(headSel);
-        if (!head) return;
-
-        if (!box.hasAttribute("data-mobile-collapsible-bound")) {
-          box.setAttribute("data-mobile-collapsible-bound", "1");
-
-          if (isMobile()) box.classList.remove("is-open");
-          else box.classList.add("is-open");
-
-          head.addEventListener("click", () => {
-            if (!isMobile()) return;
-            box.classList.toggle("is-open");
-          });
-        }
-      });
-    };
-
-    const syncOpenState = () => {
-      document
-        .querySelectorAll(".toc-global, .toc-local")
-        .forEach((box) => {
-          if (isMobile()) box.classList.remove("is-open");
-          else box.classList.add("is-open");
-        });
-    };
-
-    bindToggle(".toc-global", ".toc-global__head");
-    bindToggle(".toc-local", ".toc-local__head");
-    bindToggle(".toc-global", "[data-toc-global-head]");
-    bindToggle(".toc-local", "[data-toc-local-head]");
-
-    syncOpenState();
-    window.addEventListener("resize", syncOpenState, { passive: true });
-  });
+  /*
+   * TOC accordions are owned by EditionToc.astro / LocalToc.astro.
+   * Keep only the top-zone auto-collapse below; the previous legacy
+   * mobile-toc-collapse binder toggled an unused .is-open state and
+   * added duplicate click listeners on the same headers.
+   */
 
   safe("reading-follow", () => {
     if (!reading || !followEl) return;
diff --git a/src/pages/archicrat-ia/index.astro b/src/pages/archicrat-ia/index.astro
index 18d7f98..b380c3a 100644
--- a/src/pages/archicrat-ia/index.astro
+++ b/src/pages/archicrat-ia/index.astro
@@ -7,15 +7,62 @@ entries.sort((a, b) => (a.data.order ?? 9999) - (b.data.order ?? 9999));
 ---
 
 <SiteLayout title="Essai-thèse — ArchiCraT-IA">
-  <h1>Essai-thèse — ArchiCraT-IA</h1>
+  <section class="landing landing-home">
+    <header class="landing-hero">
+      <p class="landing-kicker">Corpus principal</p>
+      <h1>Essai-thèse — ArchiCraT-IA</h1>
+      <p class="landing-lead">
+        Fondements, histoire, philosophie du pouvoir, tensions et régulations
+        archicratiques.
+      </p>
+    </header>
 
-  <ul>
-    {entries.map((e) => (
-      <li>
-        <a href={`/archicrat-ia/${String(e.id).replace(/\.(md|mdx)$/i, "")}/`}>
-          {e.data.title}
-        </a>
-      </li>
-    ))}
-  </ul>
+    <section class="edition-note" aria-labelledby="note-lecteur-title">
+      <p class="landing-kicker">Note au lecteur</p>
+      <h2 id="note-lecteur-title">Statut du travail</h2>
+
+      <p>
+        Le texte que vous vous apprêtez à lire ne constitue pas une théorie close
+        ni un système achevé. Il s’agit d’un travail de longue élaboration, ayant
+        progressivement pris la forme d’une hypothèse structurée : celle d’une
+        méta-grammaire des régulations collectives, désignée ici sous le nom
+        d’archicratie.
+      </p>
+
+      <p>
+        Cette proposition vise à offrir un cadre transversal pour penser les formes
+        de constitution, de régulation et d’évolution des collectifs humains, en
+        particulier dans des contextes marqués par la complexification des dispositifs,
+        l’opacification des décisions et la transformation des scènes de conflictualité.
+      </p>
+
+      <p>
+        Elle doit donc être lue comme une architecture conceptuelle déjà cohérente
+        dans ses lignes de force, mais encore ouverte à la discussion, à la critique,
+        à l’approfondissement et à la mise à l’épreuve.
+      </p>
+
+      <p>
+        Ce texte est proposé non comme un énoncé définitif, mais comme une hypothèse
+        à éprouver : un chantier ouvert dont la viabilité dépendra aussi de sa
+        capacité à être interrogé, corrigé et repris.
+      </p>
+    </section>
+
+    <section class="landing-section">
+      <div class="landing-section__head">
+        <p class="landing-kicker">Index de l’œuvre</p>
+        <h2>Parcours de lecture</h2>
+      </div>
+
+      <div class="landing-grid">
+        {entries.map((e) => (
+          <a class="landing-card" href={`/archicrat-ia/${String(e.id).replace(/\.(md|mdx)$/i, "")}/`}>
+            <strong>{e.data.title}</strong>
+            <small>Lire ce texte →</small>
+          </a>
+        ))}
+      </div>
+    </section>
+  </section>
 </SiteLayout>
\ No newline at end of file
diff --git a/src/pages/cas-ia/index.astro b/src/pages/cas-ia/index.astro
index f76dc6a..d5403f0 100644
--- a/src/pages/cas-ia/index.astro
+++ b/src/pages/cas-ia/index.astro
@@ -7,15 +7,68 @@ entries.sort((a, b) => (a.data.order ?? 9999) - (b.data.order ?? 9999));
 ---
 
 <SiteLayout title="Cas pratique — Gouvernance des systèmes IA">
-  <h1>Cas pratique — Gouvernance des systèmes IA</h1>
+  <section class="landing landing-home">
+    
+    <!-- HERO -->
+    <header class="landing-hero">
+      <p class="landing-kicker">Cas pratique</p>
 
-  <ul>
-    {entries.map((e) => (
-      <li>
-        <a href={`/cas-ia/${String(e.id).replace(/\.(md|mdx)$/i, "")}/`}>
-          {e.data.title}
-        </a>
-      </li>
-    ))}
-  </ul>
+      <h1>Gouvernance des systèmes IA</h1>
+
+      <p class="landing-lead">
+        Une mise à l’épreuve du paradigme archicratique à travers les systèmes
+        contemporains d’intelligence artificielle.
+      </p>
+    </header>
+
+    <!-- NOTE AU LECTEUR -->
+    <section class="edition-note" aria-labelledby="note-cas-title">
+      <p class="landing-kicker">Note au lecteur</p>
+      <h2 id="note-cas-title">Statut du cas pratique</h2>
+
+      <p>
+        Ce cas pratique ne constitue pas une application stabilisée du paradigme
+        archicratique, mais un terrain d’expérimentation destiné à en éprouver
+        la portée, les limites et les conditions d’opérabilité.
+      </p>
+
+      <p>
+        Les systèmes d’intelligence artificielle offrent un environnement
+        particulièrement exigeant : complexité technique, opacité croissante,
+        enchevêtrement d’acteurs, transformations rapides des cadres de régulation.
+      </p>
+
+      <p>
+        L’analyse proposée doit donc être lue comme une série d’épreuves
+        — détectabilité, topologie, archéogenèse, morphologie, historicité,
+        co-viabilité — visant à faire apparaître les architectures effectives
+        qui organisent ces systèmes.
+      </p>
+
+      <p>
+        Ce travail n’a pas vocation à clore l’analyse, mais à ouvrir un espace
+        d’investigation : il s’agit moins de fournir des réponses définitives
+        que de rendre visibles les tensions et les structures qui appellent
+        régulation.
+      </p>
+    </section>
+
+    <!-- INDEX -->
+    <section class="landing-section">
+      <div class="landing-section__head">
+        <p class="landing-kicker">Index du cas</p>
+        <h2>Parcours d’analyse</h2>
+      </div>
+
+      <div class="landing-grid">
+        {entries.map((e) => (
+          <a class="landing-card" href={`/cas-ia/${String(e.id).replace(/\.(md|mdx)$/i, "")}/`}>
+            <strong>{e.data.title}</strong>
+            <small>Lire ce chapitre →</small>
+          </a>
+        ))}
+      </div>
+    </section>
+
+  </section>
 </SiteLayout>
\ No newline at end of file
diff --git a/src/pages/commencer/index.astro b/src/pages/commencer/index.astro
index cf8ce89..caf7fac 100644
--- a/src/pages/commencer/index.astro
+++ b/src/pages/commencer/index.astro
@@ -4,7 +4,7 @@ import DocumentDePresentation from "../../content/commencer/document-de-presenta
 ---
 
 <EditionLayout
-  title="Document de présentation"
+  title="Entrevoir l’Archicratie"
   editionLabel="Document d’entrée"
   editionKey="commencer"
   statusLabel="Présentation"
@@ -12,7 +12,20 @@ import DocumentDePresentation from "../../content/commencer/document-de-presenta
   level={1}
   version="0.1.0"
 >
-  <h1>Document de présentation</h1>
+  <h1 class="commencer-title">Entrevoir l’Archicratie...</h1>
 
   <DocumentDePresentation />
+  <nav class="landing-actions presentation-next" aria-label="Suite de lecture">
+  <a class="landing-btn landing-btn--primary" href="/archicrat-ia/">
+    Plonger dans l’essai-thèse — ArchiCraT-IA
+  </a>
+
+  <a class="landing-btn" href="/glossaire/">
+    Explorer son glossaire
+  </a>
+
+  <a class="landing-btn" href="/cas-ia/">
+    Entrer dans le cas pratique — Gouvernance IA
+  </a>
+</nav>
 </EditionLayout>
\ No newline at end of file
diff --git a/src/pages/index.astro b/src/pages/index.astro
index fa5f0f1..fec8ebc 100644
--- a/src/pages/index.astro
+++ b/src/pages/index.astro
@@ -3,55 +3,70 @@ import SiteLayout from "../layouts/SiteLayout.astro";
 ---
 
 <SiteLayout title="Archicratie — Édition web">
+  <section class="landing landing-home" aria-labelledby="home-title">
+    <header class="landing-hero">
+      <p class="landing-kicker">Édition web expérimentale</p>
 
-  <h1>Archicratie</h1>
+      <h1 id="home-title">Archicratie</h1>
 
-  <p>
-    Ce site présente le noyau conceptuel du paradigme archicratique :
-    une théorie des architectures de régulation qui rendent possible la co-viabilité
-    des sociétés complexes.
-  </p>
+      <p class="landing-lead">
+        Une recherche indépendante sur les architectures de régulation qui rendent
+        possible la co-viabilité des sociétés complexes.
+      </p>
 
-  <hr />
+      <div class="landing-actions" aria-label="Entrées principales">
+        <a class="landing-btn landing-btn--primary" href="/commencer/">
+          Entrevoir l’archicratie
+        </a>
+        <a class="landing-btn" href="/glossaire/">
+          Explorer son glossaire
+        </a>
+      </div>
+    </header>
 
-  <h2>Document d’entrée</h2>
+    <section class="landing-section" aria-labelledby="home-paths-title">
+      <div class="landing-section__head">
+        <p class="landing-kicker">Parcours</p>
+        <h2 id="home-paths-title">Accès principaux</h2>
+      </div>
 
-  <p>
-    Le document suivant propose une première entrée dans le paradigme archicratique.
-  </p>
+      <div class="landing-grid">
+        <a class="landing-card" href="/archicrat-ia/">
+          <strong>Essai-thèse — ArchiCraT-IA</strong>
+          <span>
+            Le corpus principal : fondements, histoire, philosophie du pouvoir,
+            tensions et régulations archicratiques.
+          </span>
+          <small>Lire ArchiCraT-IA →</small>
+        </a>
 
-  <p>
-    👉 <a href="/commencer/">Lire le document de présentation</a>
-  </p>
+        <a class="landing-card" href="/cas-ia/">
+          <strong>Cas pratique — Gouvernance IA</strong>
+          <span>
+            Une mise à l’épreuve contemporaine du paradigme à travers la
+            gouvernance des systèmes d’intelligence artificielle.
+          </span>
+          <small>Explorer le cas pratique →</small>
+        </a>
 
-  <hr />
-
-  <h2>Accès principaux</h2>
-
-  <ul>
-    <li>
-      <a href="/archicrat-ia/">
-        Essai-thèse — ArchiCraT-IA
-      </a>
-    </li>
-
-    <li>
-      <a href="/cas-ia/">
-        Cas pratique — Gouvernance des systèmes IA
-      </a>
-    </li>
-
-    <li>
-      <a href="/glossaire/">
-        Glossaire archicratique
-      </a>
-    </li>
-
-    <li>
-      <a href="/recherche/">
-        Recherche dans les textes
-      </a>
-    </li>
-  </ul>
+        <a class="landing-card" href="/glossaire/">
+          <strong>Glossaire</strong>
+          <span>
+            La cartographie conceptuelle du système : notions, scènes,
+            dynamiques, tensions et méta-régimes.
+          </span>
+          <small>Entrer dans le glossaire →</small>
+        </a>
 
+        <a class="landing-card" href="/recherche/">
+          <strong>Recherche</strong>
+          <span>
+            Rechercher un terme, une notion ou un passage dans les textes de
+            l’édition web.
+          </span>
+          <small>Lancer une recherche →</small>
+        </a>
+      </div>
+    </section>
+  </section>
 </SiteLayout>
\ No newline at end of file
diff --git a/src/pages/recherche/index.astro b/src/pages/recherche/index.astro
index 9ea0fec..99de08a 100644
--- a/src/pages/recherche/index.astro
+++ b/src/pages/recherche/index.astro
@@ -1,41 +1,51 @@
 ---
 import SiteLayout from "../../layouts/SiteLayout.astro";
 ---
+
 <SiteLayout title="Recherche">
-  <h1>Recherche</h1>
-  <p>Recherche plein texte (statique) dans les pages “édition-livre”.</p>
+  <section class="search-page" aria-labelledby="search-title">
+    <header class="landing-hero search-hero">
+      <p class="landing-kicker">Exploration transversale</p>
+      <h1 id="search-title">Recherche</h1>
+      <p class="landing-lead">
+        Rechercher un terme, une notion ou un passage dans les textes de l’édition web.
+      </p>
+    </header>
 
-  <div style="display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:12px 0 18px;">
-    <label>
-      <span style="display:block;font-size:12px;opacity:0.85;">Terme</span>
-      <input id="q" type="search" placeholder="Ex: archicratie, régulation, inertie…" style="padding:8px 10px;min-width:280px;">
-    </label>
+    <section class="landing-section search-panel" aria-label="Formulaire de recherche">
+      <div class="search-controls">
+        <label class="search-field search-field--main">
+          <span>Terme</span>
+          <input id="q" type="search" autocomplete="off" placeholder="Ex. archicratie, régulation, inertie…" />
+        </label>
 
-    <label>
-      <span style="display:block;font-size:12px;opacity:0.85;">Édition</span>
-      <select id="edition" style="padding:8px 10px;">
-        <option value="">Toutes</option>
-        <option value="archicratie">Archicratie</option>
-        <option value="traite">Traité</option>
-        <option value="ia">Cas IA</option>
-        <option value="glossaire">Glossaire</option>
-        <option value="atlas">Atlas</option>
-      </select>
-    </label>
+        <label class="search-field">
+          <span>Édition</span>
+          <select id="edition">
+            <option value="">Toutes</option>
+            <option value="archicrat-ia">Essai-thèse</option>
+            <option value="cas-ia">Cas IA</option>
+            <option value="glossaire">Glossaire</option>
+            <option value="commencer">Commencer</option>
+          </select>
+        </label>
 
-    <label>
-      <span style="display:block;font-size:12px;opacity:0.85;">Niveau</span>
-      <select id="level" style="padding:8px 10px;">
-        <option value="">Tous</option>
-        <option value="1">1</option>
-        <option value="2">2</option>
-        <option value="3">3</option>
-      </select>
-    </label>
-  </div>
+        <label class="search-field">
+          <span>Niveau</span>
+          <select id="level">
+            <option value="">Tous</option>
+            <option value="1">1</option>
+            <option value="2">2</option>
+            <option value="3">3</option>
+            <option value="4">4</option>
+          </select>
+        </label>
+      </div>
 
-  <div id="status" style="margin:10px 0;opacity:0.9;"></div>
-  <ol id="results" style="padding-left:18px;"></ol>
+      <p id="status" class="search-status" aria-live="polite"></p>
+      <ol id="results" class="search-results"></ol>
+    </section>
+  </section>
 
   <script is:inline>
 (() => {
@@ -52,10 +62,10 @@ import SiteLayout from "../../layouts/SiteLayout.astro";
     pfPromise = (async () => {
       try {
         const pagefind = await import("/pagefind/pagefind.js");
-        // init facultatif, mais accélère si on clique dans l’input
         await pagefind.init?.();
         return pagefind;
-      } catch {
+      } catch (e) {
+        console.error("[Recherche] Pagefind init failed:", e);
         return null;
       }
     })();
@@ -69,25 +79,26 @@ import SiteLayout from "../../layouts/SiteLayout.astro";
     return Object.keys(filters).length ? filters : null;
   }
 
-  function clearResults() {
-    results.innerHTML = "";
-  }
-
   function setStatus(msg) {
     status.textContent = msg;
   }
 
+  function clearResults() {
+    results.innerHTML = "";
+  }
+
   async function runSearch() {
     const term = q.value.trim();
+
     if (!term) {
-      setStatus("Tape un terme pour chercher.");
+      setStatus("Tape un terme pour lancer une recherche.");
       clearResults();
       return;
     }
 
     const pagefind = await getPagefind();
     if (!pagefind) {
-      setStatus("Index de recherche indisponible. Fais `npm run build` puis `npm run preview`.");
+      setStatus("Index de recherche indisponible. Lance `npm run build` puis `npm run preview`.");
       clearResults();
       return;
     }
@@ -96,49 +107,56 @@ import SiteLayout from "../../layouts/SiteLayout.astro";
     const filters = currentFilters();
     if (filters) opts.filters = filters;
 
-    setStatus("Recherche…");
+    setStatus("Recherche en cours…");
+
     const search = await pagefind.debouncedSearch(term, opts, 250);
     if (search === null) return;
 
-    const items = await Promise.all(search.results.slice(0, 20).map(r => r.data()));
-    setStatus(`${items.length} résultat(s) (sur ${search.results.length}).`);
+    const items = await Promise.all(search.results.slice(0, 24).map((r) => r.data()));
+
+    clearResults();
+
+    if (!items.length) {
+      setStatus("Aucun résultat pour cette recherche.");
+      return;
+    }
+
+    setStatus(`${items.length} résultat(s) affiché(s) sur ${search.results.length}.`);
 
-    results.innerHTML = "";
     for (const item of items) {
       const li = document.createElement("li");
-      li.style.marginBottom = "12px";
+      li.className = "search-result";
 
       const a = document.createElement("a");
+      a.className = "search-result__title";
       a.href = item.url;
       a.textContent = item.meta?.title || item.url;
 
       const meta = document.createElement("div");
-      meta.style.fontSize = "12px";
-      meta.style.opacity = "0.85";
-      const edv = item.meta?.edition ? `édition: ${item.meta.edition}` : "";
-      const lv = item.meta?.level ? `niveau: ${item.meta.level}` : "";
-      const v = item.meta?.version ? `v${item.meta.version}` : "";
-      meta.textContent = [edv, lv, v].filter(Boolean).join(" · ");
+      meta.className = "search-result__meta";
 
-      const ex = document.createElement("div");
-      ex.style.marginTop = "6px";
-      ex.innerHTML = item.excerpt || "";
+      const edition = item.meta?.edition ? `édition : ${item.meta.edition}` : "";
+      const level = item.meta?.level ? `niveau : ${item.meta.level}` : "";
+      const version = item.meta?.version ? `v${item.meta.version}` : "";
+      meta.textContent = [edition, level, version].filter(Boolean).join(" · ");
+
+      const excerpt = document.createElement("div");
+      excerpt.className = "search-result__excerpt";
+      excerpt.innerHTML = item.excerpt || "";
 
       li.appendChild(a);
       if (meta.textContent) li.appendChild(meta);
-      li.appendChild(ex);
+      li.appendChild(excerpt);
       results.appendChild(li);
     }
   }
 
-  // Précharge quand focus => UX meilleure
   q.addEventListener("focus", () => { getPagefind(); });
-
   q.addEventListener("input", runSearch);
   ed.addEventListener("change", runSearch);
   lv.addEventListener("change", runSearch);
 
-  setStatus("Tape un terme pour chercher.");
+  setStatus("Tape un terme pour lancer une recherche.");
 })();
   </script>
-</SiteLayout>
+</SiteLayout>
\ No newline at end of file
diff --git a/src/styles/global.css b/src/styles/global.css
index 64351cc..b78185a 100644
--- a/src/styles/global.css
+++ b/src/styles/global.css
@@ -65,20 +65,94 @@ a:hover { text-decoration: underline; }
 header{
   position: sticky;
   top: 0;
-  z-index: 50;
+  z-index: 1000;
+  isolation: isolate;
 
-  background: rgba(255,255,255,.92);
-  backdrop-filter: blur(10px);
-  -webkit-backdrop-filter: blur(10px);
+  background: rgba(0,0,0,.82);
+  backdrop-filter: blur(12px);
+  -webkit-backdrop-filter: blur(12px);
 
-  border-bottom: 1px solid rgba(127,127,127,0.35);
-  padding: 12px 16px;
+  border-bottom: 1px solid rgba(127,127,127,0.28);
+  padding: 10px 16px;
 }
+
+@media (prefers-color-scheme: light){
+  header{
+    background: rgba(255,255,255,.90);
+  }
+}
+
 @media (prefers-color-scheme: dark){
   header{ background: rgba(0,0,0,.72); }
 }
 
-.site-nav { font-size: 14px; opacity: 0.9; }
+.site-nav{
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 6px;
+  font-size: 13px;
+  line-height: 1.2;
+}
+
+.site-nav span[aria-hidden="true"]{
+  display: none;
+}
+
+.site-nav a{
+  display: inline-flex;
+  align-items: center;
+  min-height: 30px;
+  padding: 5px 10px;
+  border: 1px solid transparent;
+  border-radius: 999px;
+  color: #00d9ff;
+  font-weight: 700;
+  text-decoration: none;
+  opacity: .94;
+  transition:
+    transform 120ms var(--ease-out),
+    background 120ms var(--ease-out),
+    border-color 120ms var(--ease-out),
+    opacity 120ms var(--ease-out);
+}
+
+.site-nav a:hover{
+  transform: translateY(-1px);
+  background: rgba(0,217,255,.08);
+  border-color: rgba(0,217,255,.22);
+  opacity: 1;
+  text-decoration: none;
+}
+
+.site-nav a:active{
+  transform: translateY(0);
+}
+
+@media (max-width: 760px){
+  .site-nav{
+    gap: 5px;
+    font-size: 12px;
+  }
+
+  .site-nav a{
+    min-height: 28px;
+    padding: 4px 8px;
+  }
+}
+
+@media (orientation: landscape) and (max-width: 920px) and (max-height: 520px){
+  .site-nav{
+    gap: 4px;
+    font-size: 11px;
+  }
+
+  .site-nav a{
+    min-height: 24px;
+    padding: 3px 7px;
+  }
+}
+
 main { padding: 0; }
 
 .reading {
@@ -90,12 +164,10 @@ main { padding: 0; }
   letter-spacing: 0.005em;
 }
 
-.reading h1 {
-  line-height: 1.2;
-  margin: 0 0 10px;
-
-  /* polish */
-  letter-spacing: -0.01em;
+.reading > h1{
+  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
+  line-height: 1.15;
+  letter-spacing: -0.02em;
 }
 
 .reading p { margin: 0 0 12px; }
@@ -626,4 +698,320 @@ html{ scroll-behavior: smooth; }
   
   .glossary-alpha-group h3{
     margin-bottom: 8px;
+  }
+
+  /* ==========================
+    Landing pages
+    ========================== */
+
+  .reading:has(> .landing){
+    max-width: min(1180px, calc(100vw - 32px));
+    padding: 0;
+  }
+
+  .landing{
+    display: grid;
+    gap: clamp(18px, 3vw, 30px);
+    width: 100%;
+    padding: 14px 0 10px;
+  }
+
+  .landing-hero,
+  .landing-section,
+  .edition-note{
+    position: relative;
+    z-index: 0;
+    overflow: hidden;
+    border: 1px solid rgba(127,127,127,0.22);
+    border-radius: 24px;
+    background:
+      radial-gradient(circle at 12% 0%, rgba(0,217,255,0.12), transparent 36%),
+      rgba(127,127,127,0.045);
+  }
+
+  .landing-hero{
+    padding: clamp(24px, 4vw, 46px);
+  }
+
+  .landing-kicker{
+    margin: 0 0 8px;
+    color: #00d9ff;
+    font-size: .78rem;
+    line-height: 1.2;
+    font-weight: 850;
+    letter-spacing: .08em;
+    text-transform: uppercase;
+  }
+
+  .landing-hero h1{
+    margin: 0;
+    font-size: clamp(2.45rem, 7vw, 5.4rem);
+    line-height: .95;
+    letter-spacing: -.055em;
+    text-shadow: 0 0 34px rgba(0,217,255,.10);
+  }
+
+  .landing-lead{
+    max-width: 66ch;
+    margin: 18px 0 0;
+    font-size: clamp(1.02rem, 2vw, 1.28rem);
+    line-height: 1.55;
+    opacity: .94;
+    text-wrap: pretty;
+  }
+
+  .landing-actions{
+    display: flex;
+    flex-wrap: wrap;
+    gap: 10px;
+    margin-top: 24px;
+  }
+
+  .landing-btn{
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    min-height: 38px;
+    padding: 7px 14px;
+    border: 1px solid rgba(127,127,127,0.38);
+    border-radius: 999px;
+    background: rgba(127,127,127,0.06);
+    font-weight: 850;
+    text-decoration: none;
+    transition:
+      transform 120ms var(--ease-out),
+      background 120ms var(--ease-out),
+      border-color 120ms var(--ease-out);
+  }
+
+  .landing-btn:hover{
+    transform: translateY(-1px);
+    background: rgba(127,127,127,0.11);
+    text-decoration: none;
+  }
+
+  .landing-btn--primary{
+    border-color: rgba(0,217,255,0.42);
+    background: rgba(0,217,255,0.10);
+    color: #00d9ff;
+  }
+
+  .landing-section,
+  .edition-note{
+    padding: clamp(18px, 3vw, 28px);
+  }
+
+  .landing-section__head,
+  .edition-note .landing-kicker{
+    margin-bottom: 14px;
+  }
+
+  .landing-section h2,
+  .edition-note h2{
+    margin: 0;
+    font-size: clamp(1.45rem, 3vw, 2.25rem);
+    line-height: 1.05;
+    letter-spacing: -.035em;
+  }
+
+  .edition-note p:not(.landing-kicker){
+    max-width: 78ch;
+    margin: 14px 0 0;
+    line-height: 1.62;
+    opacity: .93;
+    text-wrap: pretty;
+  }
+
+  .landing-grid{
+    display: grid;
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    gap: 12px;
+  }
+
+  .landing-card{
+    display: grid;
+    gap: 8px;
+    min-width: 0;
+    padding: 16px;
+    border: 1px solid rgba(127,127,127,0.22);
+    border-radius: 18px;
+    background: rgba(127,127,127,0.045);
+    text-decoration: none;
+    transition:
+      transform 120ms var(--ease-out),
+      background 120ms var(--ease-out),
+      border-color 120ms var(--ease-out);
+  }
+
+  .landing-card:hover{
+    transform: translateY(-1px);
+    background: rgba(127,127,127,0.075);
+    border-color: rgba(0,217,255,0.24);
+    text-decoration: none;
+  }
+
+  .landing-card strong{
+    color: #00d9ff;
+    font-size: 1.05rem;
+    line-height: 1.22;
+  }
+
+  .landing-card span{
+    color: inherit;
+    line-height: 1.5;
+    opacity: .92;
+  }
+
+  .landing-card small{
+    color: #00d9ff;
+    font-weight: 800;
+    opacity: .92;
+  }
+
+  .presentation-next{
+    margin-top: 42px;
+    padding-top: 24px;
+    border-top: 1px solid rgba(127,127,127,0.25);
+  }
+
+  body[data-edition-key="commencer"] .commencer-title{
+    font-size: clamp(2.6rem, 6vw, 4.8rem);
+    line-height: .98;
+    letter-spacing: -.055em;
+    margin: 18px 0 28px;
+    text-shadow: 0 0 34px rgba(0,217,255,.10);
+  }
+
+  body[data-edition-key="commencer"] .reading h2{
+    margin-top: 34px;
+    padding-top: 18px;
+    border-top: 1px solid rgba(127,127,127,.18);
+    font-size: clamp(1.35rem, 2.3vw, 1.85rem);
+    letter-spacing: -.025em;
+  }
+
+  body[data-edition-key="commencer"] .reading h2:first-of-type{
+    margin-top: 0;
+    padding-top: 0;
+    border-top: 0;
+  }
+
+  @media (max-width: 760px){
+    .reading:has(> .landing){
+      max-width: none;
+      width: auto;
+      margin: 0;
+      padding: 0 12px;
+    }
+
+    .landing{
+      gap: 18px;
+      padding-top: 8px;
+    }
+
+    .landing-hero,
+    .landing-section,
+    .edition-note{
+      border-radius: 18px;
+    }
+
+    .landing-hero,
+    .landing-section,
+    .edition-note{
+      padding: 18px 16px;
+    }
+
+    .landing-hero h1{
+      font-size: clamp(2.15rem, 13vw, 3.25rem);
+    }
+
+    .landing-lead{
+      font-size: .98rem;
+      line-height: 1.42;
+    }
+
+    .landing-grid{
+      grid-template-columns: 1fr;
+    }
+
+    .landing-card{
+      padding: 14px;
+      border-radius: 15px;
+    }
+
+    .edition-note p:not(.landing-kicker){
+      line-height: 1.52;
+    }
+  }
+
+  @media (max-width: 460px){
+    .landing-actions{
+      display: grid;
+    }
+
+    .landing-btn{
+      width: 100%;
+      box-sizing: border-box;
+    }
+  }
+
+  @media (orientation: landscape) and (max-width: 920px) and (max-height: 520px){
+    .reading:has(> .landing){
+      max-width: none;
+      width: auto;
+      margin: 0;
+      padding: 0 10px;
+    }
+
+    .landing{
+      gap: 14px;
+      padding-top: 6px;
+    }
+
+    .landing-hero,
+    .landing-section,
+    .edition-note{
+      padding: 14px 16px;
+      border-radius: 16px;
+    }
+
+    .landing-hero h1{
+      font-size: clamp(2.2rem, 6vw, 4.6rem);
+    }
+
+    .landing-lead{
+      margin-top: 12px;
+      font-size: .94rem;
+      line-height: 1.38;
+    }
+
+    .landing-actions{
+      margin-top: 16px;
+    }
+
+    .edition-note p:not(.landing-kicker){
+      margin-top: 10px;
+      line-height: 1.45;
+    }
+  }
+
+  .search-hero h1{
+    font-size: clamp(1.9rem, 4.5vw, 2.8rem);
+    letter-spacing: -0.03em;
+  }
+
+  .reading h1{
+    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
+    line-height: 1.15;
+    letter-spacing: -0.02em;
+  }
+
+  @media (max-width: 760px){
+    .landing-hero h1{
+      font-size: clamp(2rem, 10vw, 3.2rem);
+    }
+  
+    .search-hero h1{
+      font-size: clamp(1.7rem, 7vw, 2.3rem);
+    }
   }
\ No newline at end of file