nav: add a Learn tab pointing at the teaching site, and drop the scroll-spy underline - tracking the active section as you scrolled read as clunky, so the underline is hover-only now; also refresh the public CV

src/components/Nav.astro

@@ -2,16 +2,15 @@
 import ThemeToggle from "./ThemeToggle.astro";
 import { site } from "../data/site";
 
-// `id` ties a nav link to a homepage section so the Motion layer animates its
-// underline as that section scrolls through (scroll-spy). Projects/Blog navigate
-// to their own pages on click, but on the homepage they track the #projects and
-// #writing sections so every nav item gets the underline - in both directions.
+// Plain links. Hover shows the underline; there is no scroll-spy - tracking the
+// active section as you scrolled read as clunky, so the underline is hover-only.
 const links = [
-  { label: "About", href: "/#about", id: "about" },
-  { label: "Skills", href: "/#skills", id: "skills" },
-  { label: "Projects", href: "/projects/", id: "projects" },
-  { label: "Blog", href: "/blog/", id: "writing" },
-  { label: "Contact", href: "/#contact", id: "contact" },
+  { label: "About", href: "/#about" },
+  { label: "Skills", href: "/#skills" },
+  { label: "Projects", href: "/projects/" },
+  { label: "Blog", href: "/blog/" },
+  { label: "Contact", href: "/#contact" },
+  { label: "Learn", href: "https://learn.bztmon.com", external: true },
 ];
 ---
 
@@ -23,7 +22,11 @@ const links = [
 
     <nav class="nav__links" aria-label="Primary">
       {links.map((l) => (
-        <a href={l.href} data-nav-id={l.id}>
+        <a
+          href={l.href}
+          target={l.external ? "_blank" : undefined}
+          rel={l.external ? "noopener noreferrer" : undefined}
+        >
           {l.label}<span class="nav__ul" aria-hidden="true"></span>
         </a>
       ))}
@@ -95,8 +98,9 @@ const links = [
     color: var(--text);
     text-decoration: none;
   }
-  /* Active-section / hover underline - scaleX scrubbed by the Motion layer
-     (spring). transform-origin left so it grows from the start of the label. */
+  /* Hover underline - scaleX sprung by the Motion layer, growing from the
+     start of the label. No scroll-spy: it tracked the active section as you
+     scrolled, which read as clunky on a page this short. */
   .nav__ul {
     position: absolute;
     left: 0;

src/scripts/anim.ts

@@ -92,73 +92,21 @@ function run(): void {
 
 function initNav(): void {
   const links = Array.from(
-    document.querySelectorAll<HTMLAnchorElement>(".nav__links a[data-nav-id]"),
+    document.querySelectorAll<HTMLAnchorElement>(".nav__links a"),
   );
   if (!links.length) return;
 
   const spring = { type: "spring", stiffness: 380, damping: 30 } as const;
-  let activeIdx = -1;
 
-  // `fromRight` flips the grow/collapse origin so the underline animates in the
-  // direction of travel: scrolling down it grows from the left (moves right);
-  // scrolling back up it grows from the right (moves left).
-  const under = (a: HTMLAnchorElement, on: boolean, fromRight = false): void => {
+  const under = (a: HTMLAnchorElement, on: boolean): void => {
     const ul = a.querySelector<HTMLElement>(".nav__ul");
     if (!ul) return;
-    ul.style.transformOrigin = fromRight ? "100% 50%" : "0% 50%";
     animate(ul, { scaleX: on ? 1 : 0 }, spring);
   };
 
-  // Links that map to a section ON THIS PAGE. Projects/Blog point at the homepage
-  // #projects / #writing sections so every nav item gets the underline; on their
-  // own pages those sections don't exist and they simply drop out of the spy.
-  const sectioned = links.filter(
-    (a) => a.dataset.navId && document.getElementById(a.dataset.navId),
-  );
-
   for (const a of links) {
     a.addEventListener("pointerenter", () => under(a, true));
-    // On leave, keep the underline only if this link IS the active scroll-spy
-    // section. Guard on activeIdx >= 0 so that when nothing is active - e.g. the
-    // Projects/Blog pages, where none of these sections exist and activeIdx stays
-    // -1 - a hovered tab doesn't stick lit via the -1 === indexOf(non-member) -1.
-    a.addEventListener("pointerleave", () =>
-      under(a, activeIdx >= 0 && sectioned.indexOf(a) === activeIdx),
-    );
-  }
-
-  // Light up the link whose section is currently being read, recomputed from
-  // scroll position so it tracks BOTH directions. Every change re-asserts ALL
-  // underlines (active → 1, the rest → 0) so none can be left stranded, and the
-  // grow/collapse origin follows the scroll direction.
-  if (sectioned.length) {
-    const setActive = (): void => {
-      const vh = window.innerHeight;
-      const ref = vh * 0.45; // a section whose top has passed this line is "active"
-      let idx = -1;
-      sectioned.forEach((a, i) => {
-        const sec = document.getElementById(a.dataset.navId as string);
-        if (sec && sec.getBoundingClientRect().top <= ref) idx = i;
-      });
-      // At the very bottom the last (often short) section may never push its top
-      // above the line - force it so the final item lights up.
-      if (window.scrollY + vh >= document.documentElement.scrollHeight - 4) {
-        idx = sectioned.length - 1;
-      }
-      if (idx === activeIdx) return;
-      const backward = idx < activeIdx; // scrolling up → travel left
-      activeIdx = idx;
-      // Coherent directional slide: the activating underline grows from its
-      // trailing edge while the others collapse toward the leading edge, so the
-      // whole motion follows the scroll direction (down → right, up → left)
-      // instead of the active/old pair diverging.
-      sectioned.forEach((a, i) => {
-        const on = i === idx;
-        under(a, on, on ? backward : !backward);
-      });
-    };
-    scroll(setActive);
-    setActive();
+    a.addEventListener("pointerleave", () => under(a, false));
   }
 }