diff --git a/src/components/Carousel.astro b/src/components/Carousel.astro
index d82455c..8ef2067 100644
--- a/src/components/Carousel.astro
+++ b/src/components/Carousel.astro
@@ -12,6 +12,7 @@ interface Props {
 const { images } = Astro.props;
 
 const carouselId = `carousel-${Math.random().toString(36).slice(2, 11)}`;
+const helpId = `${carouselId}-help`;
 ---
 
 <section
@@ -21,21 +22,22 @@ const carouselId = `carousel-${Math.random().toString(36).slice(2, 11)}`;
   aria-roledescription="carousel"
   aria-label="Image carousel"
   data-carousel-id={carouselId}
+  tabindex="0"
+  aria-describedby={helpId}
 >
   <!-- Slides -->
   <div class="relative h-0 pb-[56.25%]">
-    <!-- 16:9 ratio placeholder -->
     {
       images.map((image, i) => (
         <img
           src={image.src.src}
           alt={image.alt}
           class={`
-          absolute inset-0 w-full h-full object-cover object-top
-          transition-opacity duration-500 ease-in-out
-          ${i === 0 ? "opacity-100" : "opacity-0"}
-          carousel-slide
-        `}
+            absolute inset-0 w-full h-full object-cover object-top
+            transition-opacity duration-500 ease-in-out
+            ${i === 0 ? "opacity-100" : "opacity-0"}
+            carousel-slide
+          `}
           data-index={i}
         />
       ))
@@ -73,6 +75,20 @@ const carouselId = `carousel-${Math.random().toString(36).slice(2, 11)}`;
     <span class="sr-only">Next</span>
   </button>
 
+  <!-- Theater toggle button (bottom-right) -->
+  <button
+    type="button"
+    class="absolute bottom-4 right-4 flex h-10 w-10 items-center justify-center
+           rounded-full bg-white/30 backdrop-blur-sm text-gray-800
+           hover:bg-white focus:outline-none focus-visible:ring-2
+           focus-visible:ring-indigo-600 transition-colors"
+    aria-label="Enter wide mode"
+    aria-pressed="false"
+    data-theater-toggle
+  >
+    <Icon name="mdi:arrow-expand-horizontal" class="h-5 w-5" />
+  </button>
+
   <!-- Live region for screen‑reader announcements -->
   <div
     class="sr-only"
@@ -81,12 +97,15 @@ const carouselId = `carousel-${Math.random().toString(36).slice(2, 11)}`;
     data-live-announcer
   >
   </div>
+
+  <!-- Hidden helper text for screen readers -->
+  <p id={helpId} class="sr-only">
+    Carousel focused. Use Left and Right Arrow keys to change slides. Press T to
+    toggle wide mode. Press Escape to exit wide mode.
+  </p>
 </section>
 
 <script define:vars={{ carouselId }}>
-  // -----------------------------------------------------------------
-  //  Carousel logic – runs once the component is in the DOM.
-  // -----------------------------------------------------------------
   document.addEventListener("DOMContentLoaded", () => {
     const carousel = document.getElementById(carouselId);
     if (!carousel) return;
@@ -95,14 +114,49 @@ const carouselId = `carousel-${Math.random().toString(36).slice(2, 11)}`;
     const prevBtn = carousel.querySelector('[data-dir="prev"]');
     const nextBtn = carousel.querySelector('[data-dir="next"]');
     const liveAnnouncer = carousel.querySelector("[data-live-announcer]");
+    const theaterBtn = carousel.querySelector("[data-theater-toggle]");
 
     let current = 0;
     const total = slides.length;
     let autoRotateTimer;
+    let theater = false;
+
+    const updateTheaterButton = () => {
+      if (!theaterBtn) return;
+      theaterBtn.setAttribute("aria-pressed", theater ? "true" : "false");
+      theaterBtn.setAttribute(
+        "aria-label",
+        theater ? "Exit wide mode" : "Enter wide mode",
+      );
+      const icon = theaterBtn.querySelector("svg");
+      if (icon) {
+        icon.setAttribute("data-icon-state", theater ? "collapse" : "expand");
+      }
+    };
+
+    const applyTheaterState = () => {
+      const section = carousel.closest("[data-threecol]");
+      if (!section) return;
+      section.classList.toggle("theater-mode", theater);
+      updateTheaterButton();
+    };
+
+    const toggleTheater = () => {
+      theater = !theater;
+      applyTheaterState();
+    };
+
+    const exitTheater = () => {
+      if (!theater) return;
+      theater = false;
+      applyTheaterState();
+    };
+
+    theaterBtn?.addEventListener("click", (e) => {
+      e.preventDefault();
+      toggleTheater();
+    });
 
-    // -----------------------------------------------------------------
-    // Helper – show a slide by index (with fade transition)
-    // -----------------------------------------------------------------
     const showSlide = (index) => {
       slides[current].classList.remove("opacity-100");
       slides[current].classList.add("opacity-0");
@@ -112,15 +166,11 @@ const carouselId = `carousel-${Math.random().toString(36).slice(2, 11)}`;
       slides[current].classList.remove("opacity-0");
       slides[current].classList.add("opacity-100");
 
-      // Update screen‑reader announcement
       if (liveAnnouncer) {
-        liveAnnouncerContent = `Slide ${current + 1} of ${total}`;
+        liveAnnouncer.textContent = `Slide ${current + 1} of ${total}`;
       }
     };
 
-    // -----------------------------------------------------------------
-    // Navigation button handlers
-    // -----------------------------------------------------------------
     const goPrev = () => {
       const prev = (current - 1 + total) % total;
       showSlide(prev);
@@ -133,24 +183,37 @@ const carouselId = `carousel-${Math.random().toString(36).slice(2, 11)}`;
     prevBtn?.addEventListener("click", goPrev);
     nextBtn?.addEventListener("click", goNext);
 
-    // -----------------------------------------------------------------
-    // Keyboard navigation (left / right arrows)
-    // -----------------------------------------------------------------
+    // Key handling (now works when the section itself is focused)
     carousel.addEventListener("keydown", (e) => {
+      const target = e.target;
+      const isTyping =
+        target instanceof HTMLElement &&
+        (target.tagName === "INPUT" ||
+          target.tagName === "TEXTAREA" ||
+          target.isContentEditable);
+      if (isTyping) return;
+
       if (e.key === "ArrowLeft") {
         e.preventDefault();
         goPrev();
       } else if (e.key === "ArrowRight") {
         e.preventDefault();
         goNext();
+      } else if (
+        (e.key === "t" || e.key === "T") &&
+        !e.altKey &&
+        !e.metaKey &&
+        !e.ctrlKey
+      ) {
+        e.preventDefault();
+        toggleTheater();
+      } else if (e.key === "Escape") {
+        exitTheater();
       }
     });
 
-    // -----------------------------------------------------------------
-    // Auto‑rotate (pause on hover / focus)
-    // -----------------------------------------------------------------
     const startAutoRotate = () => {
-      stopAutoRotate(); // safety
+      stopAutoRotate();
       autoRotateTimer = window.setInterval(goNext, 5000);
     };
     const stopAutoRotate = () => {
@@ -160,10 +223,8 @@ const carouselId = `carousel-${Math.random().toString(36).slice(2, 11)}`;
       }
     };
 
-    // Start rotating when the component mounts
     startAutoRotate();
 
-    // Pause when the user hovers or focuses inside the carousel
     carousel.addEventListener("mouseenter", stopAutoRotate);
     carousel.addEventListener("mouseleave", startAutoRotate);
     carousel.addEventListener("focusin", stopAutoRotate);
diff --git a/src/components/ThreeColumnSection.astro b/src/components/ThreeColumnSection.astro
index 5f17777..fc94e46 100644
--- a/src/components/ThreeColumnSection.astro
+++ b/src/components/ThreeColumnSection.astro
@@ -27,23 +27,113 @@ const maxWidthClasses = {
 };
 ---
 
-<section class={`${bgClass} ${py}`}>
+<section class={`${bgClass} ${py}`} data-threecol>
   <div
-    class={`${maxWidthClasses[maxWidth]} mx-auto grid grid-cols-1 lg:grid-cols-[1fr_640px_1fr] items-center md:items-start gap-8 px-4 ${containerClass}`}
+    class={`threecol-row ${maxWidthClasses[maxWidth]} mx-auto flex flex-col lg:flex-row gap-8 px-4 ${containerClass}`}
   >
-    <!-- Left Column (Hidden on mobile, visible on desktop) -->
-    <div class={`${reverseOnMobile ? "order-3 lg:order-1" : "order-1"}`}>
+    <!-- Left Column -->
+    <div
+      class={`${reverseOnMobile ? "order-3 lg:order-1" : "order-1"} flex-col`}
+      data-left
+    >
       <slot name="left" />
     </div>
 
-    <!-- Center Column (Main content) -->
-    <div class={`order-1 lg:order-2`}>
+    <!-- Center Column -->
+    <div class={`order-1 lg:order-2 flex-col`} data-center>
       <slot name="center" />
     </div>
 
     <!-- Right Column -->
-    <div class={`${reverseOnMobile ? "order-1 lg:order-3" : "order-3"}`}>
+    <div
+      class={`${reverseOnMobile ? "order-1 lg:order-3" : "order-3"} flex-col`}
+      data-right
+    >
       <slot name="right" />
     </div>
   </div>
 </section>
+
+<style>
+  /* Base layout variables */
+  [data-threecol] .threecol-row {
+    --center-initial: 640px; /* initial center width at lg+ */
+    --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
+  }
+
+  /* Make sure columns can shrink properly */
+  [data-threecol] [data-left],
+  [data-threecol] [data-center],
+  [data-threecol] [data-right] {
+    min-width: 0;
+  }
+
+  /* Large-screen flex behavior (mobile stays stacked naturally) */
+  @media (min-width: 1024px) {
+    [data-threecol] .threecol-row {
+      align-items: stretch;
+    }
+
+    [data-threecol] [data-left] {
+      max-width: 33.33%;
+      flex: 1 1 33.33%;
+      /* optional: transition flex changes if you expect subtle movement */
+      transition: flex 0.55s var(--transition-ease);
+    }
+
+    [data-threecol] [data-center] {
+      flex: 0 0 var(--center-initial);
+      transition:
+        flex-basis 0.55s var(--transition-ease),
+        flex-grow 0.55s var(--transition-ease),
+        max-width 0.55s var(--transition-ease);
+      display: flex;
+      flex-direction: column;
+    }
+
+    [data-threecol] [data-right] {
+      flex: 1 1 0;
+      transition:
+        flex-basis 0.55s var(--transition-ease),
+        flex-grow 0.55s var(--transition-ease),
+        opacity 0.35s ease;
+      display: flex;
+      flex-direction: column;
+    }
+
+    /* THEATER MODE (expanded center) */
+    [data-threecol].theater-mode [data-center] {
+      flex: 1 1 0; /* allow it to fill remaining space */
+      max-width: 100%;
+    }
+
+    [data-threecol].theater-mode [data-right] {
+      flex: 0 0 0;
+      flex-grow: 0;
+      opacity: 0;
+      pointer-events: none;
+    }
+
+    /* Optional: subtle emphasis on the center content while expanding */
+    [data-threecol] .threecol-row :is([data-center]) .carousel-theater-target,
+    [data-threecol] .threecol-row :is([data-center]) > * {
+      transition:
+        box-shadow 0.55s var(--transition-ease),
+        transform 0.55s var(--transition-ease);
+    }
+    [data-threecol].theater-mode [data-center] .carousel-theater-target,
+    [data-threecol].theater-mode [data-center] > * {
+      /* Example visual polish (comment out if not desired) */
+      /* box-shadow: 0 6px 24px -4px rgba(0,0,0,.25); */
+    }
+  }
+
+  /* Reduced motion */
+  @media (prefers-reduced-motion: reduce) {
+    [data-threecol] [data-left],
+    [data-threecol] [data-center],
+    [data-threecol] [data-right] {
+      transition: none !important;
+    }
+  }
+</style>