diff --git a/css/editorial.css b/css/editorial.css
index 54239a9..a6048fc 100644
--- a/css/editorial.css
+++ b/css/editorial.css
@@ -105,6 +105,10 @@ code {
   font-weight: 600;
 }
 
+.nav-toggle {
+  display: none;
+}
+
 .site-nav > a:not(.nav-pill)::after {
   bottom: -0.25rem;
   height: 3px;
@@ -1578,6 +1582,79 @@ code {
     padding-left: 1rem;
   }
 
+  .nav-toggle {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.8rem;
+    padding: 0.7rem 0;
+    border: 0;
+    background: transparent;
+    color: var(--text);
+    font: 600 0.75rem var(--mono);
+    letter-spacing: 0.08em;
+    text-transform: uppercase;
+  }
+
+  .nav-toggle span:last-child {
+    color: var(--coral);
+    font-size: 1rem;
+    transition: transform 180ms ease;
+  }
+
+  .site-header.is-nav-open .nav-toggle span:last-child {
+    transform: rotate(45deg);
+  }
+
+  .site-nav {
+    position: absolute;
+    top: 100%;
+    right: 0;
+    left: 0;
+    display: grid;
+    padding: 0 1rem 1rem;
+    transform: translateY(-0.5rem);
+    border-bottom: 2px solid var(--line);
+    background: var(--bg);
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    gap: 0;
+    opacity: 0;
+    pointer-events: none;
+    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms;
+    visibility: hidden;
+  }
+
+  .site-header.is-nav-open .site-nav {
+    transform: translateY(0);
+    opacity: 1;
+    pointer-events: auto;
+    visibility: visible;
+  }
+
+  .site-nav > a:not(.nav-pill) {
+    display: flex;
+    min-height: 3.25rem;
+    align-items: center;
+    border-bottom: 1px solid var(--line);
+    color: var(--text);
+  }
+
+  .site-nav > a:nth-of-type(even):not(.nav-pill) {
+    padding-left: 1rem;
+    border-left: 1px solid var(--line);
+  }
+
+  .site-nav .nav-pill {
+    min-height: 3.25rem;
+    padding: 0;
+    border: 0;
+    border-bottom: 1px solid var(--line);
+    grid-column: 1 / -1;
+  }
+
+  .nav-gooey {
+    display: none;
+  }
+
   .nav-pill {
     padding-left: 0.8rem;
   }
@@ -1591,6 +1668,14 @@ code {
     font-size: clamp(3.7rem, 17vw, 6rem);
   }
 
+  .hero-liquid-pre {
+    color: rgba(143, 212, 208, 0.32);
+  }
+
+  .hero-copy {
+    text-shadow: 0 1px 1px rgba(16, 26, 33, 0.55);
+  }
+
   .hero-signals {
     grid-template-columns: 1fr;
   }
@@ -1635,6 +1720,12 @@ code {
     font-size: clamp(2.8rem, 13vw, 4.8rem);
   }
 
+  .stack-intro {
+    max-width: 36rem;
+    margin-top: 1.5rem;
+    grid-column: 1;
+  }
+
   .about-layout {
     grid-template-columns: 1fr;
   }
diff --git a/index.html b/index.html
index a83a5de..a4641ad 100644
--- a/index.html
+++ b/index.html
@@ -19,8 +19,8 @@
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
   <link href="https://fonts.googleapis.com/css2?family=Archivo+Black&amp;family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,600;1,400&amp;display=swap" rel="stylesheet">
-  <link rel="stylesheet" href="css/style.css?v=4">
-  <link rel="stylesheet" href="css/editorial.css?v=4">
+  <link rel="stylesheet" href="css/style.css?v=5">
+  <link rel="stylesheet" href="css/editorial.css?v=5">
 
   <link rel="icon" href="/favicon.ico" sizes="any">
   <link rel="icon" href="/icon.svg" type="image/svg+xml">
@@ -39,7 +39,11 @@
       <span>fi3w0</span>
     </a>
 
-    <nav class="site-nav" aria-label="Primary navigation">
+    <button class="nav-toggle" type="button" aria-expanded="false" aria-controls="primary-navigation">
+      <span>Menu</span><span aria-hidden="true">+</span>
+    </button>
+
+    <nav class="site-nav" id="primary-navigation" aria-label="Primary navigation">
       <span class="nav-gooey" aria-hidden="true">
         <span class="nav-gooey-blob nav-gooey-blob--trail"></span>
         <span class="nav-gooey-blob nav-gooey-blob--lead"></span>
@@ -414,7 +418,7 @@
     <p>&copy; <span id="year">2026</span> Alex / Fi3w0</p>
   </footer>
 
-  <script src="js/app.js?v=4" defer></script>
+  <script src="js/app.js?v=5" defer></script>
 </body>
 
 </html>
diff --git a/js/app.js b/js/app.js
index fdf5e16..663ce3a 100644
--- a/js/app.js
+++ b/js/app.js
@@ -118,7 +118,7 @@ if (scrambleHeadings.length && !reducedMotion && "IntersectionObserver" in windo
     heading.dataset.finalText = heading.textContent ?? "";
   });
 
-  const decryptHeading = (heading, duration = 600, steps = 14) => {
+  const decryptHeading = (heading, duration = 420, steps = 10) => {
     const finalText = heading.dataset.finalText ?? "";
     const totalChars = finalText.length;
     let frame = 0;
@@ -149,12 +149,52 @@ if (scrambleHeadings.length && !reducedMotion && "IntersectionObserver" in windo
         observer.unobserve(entry.target);
       });
     },
-    { rootMargin: "0px 0px -10%", threshold: 0.4 },
+    { rootMargin: "0px 0px -4%", threshold: 0.2 },
   );
 
   scrambleHeadings.forEach((heading) => scrambleObserver.observe(heading));
 }
 
+const siteHeader = document.querySelector(".site-header");
+const navToggle = document.querySelector(".nav-toggle");
+const primaryNav = document.querySelector("#primary-navigation");
+
+if (siteHeader && navToggle && primaryNav) {
+  const mobileNavQuery = window.matchMedia("(max-width: 52rem)");
+
+  const setNavOpen = (open) => {
+    siteHeader.classList.toggle("is-nav-open", open);
+    navToggle.setAttribute("aria-expanded", String(open));
+    primaryNav.toggleAttribute("inert", mobileNavQuery.matches && !open);
+  };
+
+  const syncNavMode = () => {
+    siteHeader.classList.remove("is-nav-open");
+    navToggle.setAttribute("aria-expanded", "false");
+    primaryNav.toggleAttribute("inert", mobileNavQuery.matches);
+  };
+
+  navToggle.addEventListener("click", () => {
+    setNavOpen(!siteHeader.classList.contains("is-nav-open"));
+  });
+
+  primaryNav.querySelectorAll("a").forEach((link) => {
+    link.addEventListener("click", () => {
+      if (mobileNavQuery.matches) setNavOpen(false);
+    });
+  });
+
+  document.addEventListener("keydown", (event) => {
+    if (event.key === "Escape" && siteHeader.classList.contains("is-nav-open")) {
+      setNavOpen(false);
+      navToggle.focus();
+    }
+  });
+
+  mobileNavQuery.addEventListener("change", syncNavMode);
+  syncNavMode();
+}
+
 const gooeyNav = document.querySelector(".nav-gooey");
 const gooeyLinks = document.querySelectorAll(".site-nav > a:not(.nav-pill)");