feat(ui): electric Bat-Computer redesign — cyan→magenta theme

Cinematic full-page backdrop: per-theme Bat-Computer board image,
scroll-panned (S→E→SE→NE) via CSS scroll-driven animation behind a
legibility scrim — replaces the grid/aura motif.

- Accent retuned royal-blue → the board's cyan→magenta; headline runs a
  cyan→magenta electric sweep; gradient primary CTA + scroll-progress line.
- Display face: self-hosted Chakra Petch (OFL) on hero + section titles.
- Skill chips reworked as circuit-node chips (glowing via + gradient hover
  outline); frosted-glass cards with a cyan→magenta hover hairline; section
  eyebrows get a gradient tick.
- Remove unused BackgroundGrid component + grid assets.

All CSS-only / zero external requests / no inline JS — strict CSP and A+
security headers preserved.

public/fonts/Chakra-Petch-OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2018 The Chakra Petch Project Authors (https://github.com/m4rc1e/Chakra-Petch.git)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

src/components/BackgroundGrid.astro

@@ -1,67 +0,0 @@
----
-// Cheap, CSS-only topology motif: a faint grid + slow-drifting accent glows.
-// No canvas, no WebGL, no JS. Fully disabled under prefers-reduced-motion.
----
-
-<div class="bg" aria-hidden="true">
-  <div class="bg__grid"></div>
-  <div class="bg__glow bg__glow--a"></div>
-  <div class="bg__glow bg__glow--b"></div>
-</div>
-
-<style>
-  .bg {
-    position: absolute;
-    inset: 0;
-    overflow: hidden;
-    z-index: 0;
-    pointer-events: none;
-  }
-  .bg__grid {
-    position: absolute;
-    inset: -2px;
-    background-image:
-      linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
-      linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
-    background-size: 46px 46px;
-    /* Fade the grid out toward the edges so it reads as a motif, not a table. */
-    mask-image: radial-gradient(120% 90% at 50% 0%, #000 35%, transparent 78%);
-    -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 35%, transparent 78%);
-  }
-  .bg__glow {
-    position: absolute;
-    width: 46rem;
-    height: 46rem;
-    border-radius: 50%;
-    filter: blur(60px);
-    opacity: 0.5;
-  }
-  .bg__glow--a {
-    top: -22rem;
-    left: -10rem;
-    background: radial-gradient(circle, var(--accent-glow), transparent 62%);
-    animation: drift-a 26s var(--ease) infinite alternate;
-  }
-  .bg__glow--b {
-    top: -16rem;
-    right: -14rem;
-    background: radial-gradient(circle, var(--accent-glow), transparent 65%);
-    opacity: 0.35;
-    animation: drift-b 32s var(--ease) infinite alternate;
-  }
-  @keyframes drift-a {
-    to {
-      transform: translate(6rem, 4rem) scale(1.12);
-    }
-  }
-  @keyframes drift-b {
-    to {
-      transform: translate(-5rem, 3rem) scale(1.08);
-    }
-  }
-  @media (prefers-reduced-motion: reduce) {
-    .bg__glow {
-      animation: none;
-    }
-  }
-</style>

src/components/Hero.astro

@@ -1,11 +1,9 @@
 ---
-import BackgroundGrid from "./BackgroundGrid.astro";
 import { site } from "../data/site";
 import { cvAvailable } from "../lib/assets";
 ---
 
 <section class="hero">
-  <BackgroundGrid />
   <div class="container hero__inner">
     <p class="eyebrow hero__eyebrow">{site.role}</p>
 
@@ -53,16 +51,32 @@ import { cvAvailable } from "../lib/assets";
     margin-bottom: var(--space-4);
   }
   .hero__title {
+    font-family: var(--font-display);
     font-size: var(--step-5);
     line-height: 1.12;
-    letter-spacing: -0.03em;
+    /* Chakra Petch is geometric/wide — looser tracking than Inter's -0.03em. */
+    letter-spacing: -0.005em;
     /* Extend the paint box below the baseline so background-clip:text doesn't
        crop glyph descenders (the "g" in Wright). */
     padding-bottom: 0.14em;
-    background: linear-gradient(180deg, var(--text), color-mix(in srgb, var(--text) 62%, var(--accent)));
+    /* Electric kinetic fill: light text with a cyan→magenta band — the same
+       sweep as the Bat-Computer board — gliding across once on load (heroSheen)
+       over an electric halo, tying the headline into the backdrop. */
+    background: linear-gradient(
+      100deg,
+      var(--text) 0%,
+      var(--text) 34%,
+      var(--accent) 46%,
+      var(--accent-2) 56%,
+      var(--text) 66%,
+      var(--text) 100%
+    );
+    background-size: 230% 100%;
+    background-position: 130% 0;
     -webkit-background-clip: text;
     background-clip: text;
     color: transparent;
+    filter: drop-shadow(0 0 26px var(--accent-glow));
   }
   .hero__positioning {
     margin-top: var(--space-5);
@@ -103,8 +117,11 @@ import { cvAvailable } from "../lib/assets";
     .hero__cta {
       animation: heroIn 0.7s var(--ease) both;
     }
+    /* Entrance + a one-shot electric sheen sweeping across the name. */
     .hero__title {
-      animation-delay: 0.06s;
+      animation:
+        heroIn 0.7s var(--ease) 0.06s both,
+        heroSheen 1.6s var(--ease) 0.7s both;
     }
     .hero__positioning {
       animation-delay: 0.14s;
@@ -126,4 +143,13 @@ import { cvAvailable } from "../lib/assets";
       transform: none;
     }
   }
+  /* A bright royal band sweeps left→right across the glyphs, then rests. */
+  @keyframes heroSheen {
+    from {
+      background-position: 130% 0;
+    }
+    to {
+      background-position: 0% 0;
+    }
+  }
 </style>

src/components/Section.astro

@@ -25,11 +25,27 @@ const { id, eyebrow, title, index } = Astro.props;
   .section__head {
     margin-bottom: var(--space-6);
   }
+  /* A short cyan→magenta tick leads each section eyebrow — board palette. */
+  .section__head .eyebrow {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.6rem;
+  }
+  .section__head .eyebrow::before {
+    content: "";
+    width: 1.7rem;
+    height: 2px;
+    border-radius: 2px;
+    background: linear-gradient(90deg, var(--accent), var(--accent-2));
+    box-shadow: 0 0 8px var(--accent-glow);
+  }
   .section__index {
     color: var(--text-faint);
     margin-right: 0.6rem;
   }
   .section__title {
+    font-family: var(--font-display);
+    letter-spacing: -0.01em;
     margin-top: var(--space-3);
     font-size: var(--step-3);
     max-width: 22ch;

src/components/SkillGroup.astro

@@ -10,7 +10,9 @@ const { group } = Astro.props;
   <h3 class="skill__title">{group.title}</h3>
   <p class="skill__blurb">{group.blurb}</p>
   <ul class="skill__items">
-    {group.items.map((item) => <li class="tag">{item}</li>)}
+    {group.items.map((item) => (
+      <li class="chip"><span class="chip__node" aria-hidden="true"></span>{item}</li>
+    ))}
   </ul>
 </article>
 
@@ -40,6 +42,53 @@ const { group } = Astro.props;
     margin: var(--space-2) 0 0;
     display: flex;
     flex-wrap: wrap;
+    gap: 0.5rem;
+  }
+
+  /* Circuit-node chips — a glowing cyan→magenta node + mono label, wired to the
+     board palette. Gradient border via padding-box/border-box layering so the
+     radius survives. Lights to a full gradient outline + glow on hover. */
+  .chip {
+    --chip-grad: linear-gradient(100deg, var(--accent), var(--accent-2));
+    display: inline-flex;
+    align-items: center;
     gap: 0.45rem;
+    font-family: var(--font-mono);
+    font-size: 0.72rem;
+    letter-spacing: 0.01em;
+    color: var(--text-dim);
+    padding: 0.3rem 0.62rem 0.3rem 0.55rem;
+    border-radius: 7px;
+    border: 1px solid var(--accent-line);
+    background: color-mix(in srgb, var(--surface-2) 88%, var(--accent) 12%);
+    transition: color 0.2s var(--ease), transform 0.2s var(--ease),
+      border-color 0.2s var(--ease), box-shadow 0.2s var(--ease),
+      background 0.2s var(--ease);
+  }
+  /* The node: a small cyan→magenta square that glows, like a lit via/pad. */
+  .chip__node {
+    flex: none;
+    width: 6px;
+    height: 6px;
+    border-radius: 2px;
+    background: var(--chip-grad);
+    box-shadow: 0 0 7px var(--accent-glow);
+  }
+  .chip:hover {
+    color: var(--text);
+    transform: translateY(-1px);
+    border-color: transparent;
+    /* dark fill (padding-box) inside a live gradient border (border-box) */
+    background: linear-gradient(var(--surface-2), var(--surface-2)) padding-box,
+      var(--chip-grad) border-box;
+    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.32), 0 0 16px var(--accent-glow);
+  }
+  @media (prefers-reduced-motion: reduce) {
+    .chip {
+      transition: none;
+    }
+    .chip:hover {
+      transform: none;
+    }
   }
 </style>

src/layouts/Layout.astro

@@ -56,6 +56,14 @@ const ogImage = new URL(site.ogImage, site.url).href;
     <script is:inline src="/site.js"></script>
   </head>
   <body>
+    <!-- PRO scroll UI (CSS-only, CSP-safe): a top progress line + a page-wide
+         flowing aurora that drifts continuously and parallaxes on scroll. -->
+    <div class="scroll-progress" aria-hidden="true"></div>
+    <div class="site-bg" aria-hidden="true">
+      <img class="site-bg__img site-bg__img--dark" src="/batcore-dark.webp" alt="" decoding="async" />
+      <img class="site-bg__img site-bg__img--light" src="/batcore-light.webp" alt="" decoding="async" />
+      <div class="site-bg__scrim"></div>
+    </div>
     <a class="skip-link" href="#main">Skip to content</a>
     <Nav />
     <main id="main">

src/styles/global.css

@@ -1,6 +1,24 @@
 @import "tailwindcss";
 @import "./tokens.css";
 
+/* ---- Display face: Chakra Petch (self-hosted woff2, OFL — see public/fonts) -
+   Latin subset, ~10KB/weight. font-display:swap so text paints instantly in the
+   sans fallback and swaps when the face loads (zero layout-shift on the headline). */
+@font-face {
+  font-family: "Chakra Petch";
+  font-style: normal;
+  font-weight: 600;
+  font-display: swap;
+  src: url("/fonts/chakra-petch-600.woff2") format("woff2");
+}
+@font-face {
+  font-family: "Chakra Petch";
+  font-style: normal;
+  font-weight: 700;
+  font-display: swap;
+  src: url("/fonts/chakra-petch-700.woff2") format("woff2");
+}
+
 /* ---- Base ---------------------------------------------------------------- */
 
 * {
@@ -120,25 +138,65 @@ svg {
   transform: translateY(-1px);
 }
 .btn--primary {
-  background: var(--accent);
+  background: linear-gradient(100deg, var(--accent), var(--accent-2));
   color: var(--accent-ink);
   border-color: transparent;
   font-weight: 600;
 }
 .btn--primary:hover {
-  background: var(--accent-strong);
+  filter: brightness(1.08);
+  box-shadow: 0 8px 22px var(--accent-glow);
 }
 
 /* ---- Cards / tags -------------------------------------------------------- */
 
 .card {
-  background: var(--surface);
+  position: relative;
+  /* Frosted glass over the Bat-Computer board — semi-opaque surface + blur so a
+     hint of the circuitry diffuses through without hurting legibility. */
+  background: color-mix(in srgb, var(--surface) 86%, transparent);
+  backdrop-filter: blur(14px) saturate(1.1);
+  -webkit-backdrop-filter: blur(14px) saturate(1.1);
   border: 1px solid var(--border);
   border-radius: var(--radius);
-  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
+  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease),
+    box-shadow 0.25s var(--ease);
+}
+/* A cyan→magenta hairline that ignites along the top edge on hover. Inset from
+   the corners so it stays inside the border radius (no clip needed). */
+.card::before {
+  content: "";
+  position: absolute;
+  top: 0;
+  left: 16px;
+  right: 16px;
+  height: 1px;
+  background: linear-gradient(
+    90deg,
+    transparent,
+    var(--accent),
+    var(--accent-2),
+    transparent
+  );
+  opacity: 0;
+  transition: opacity 0.25s var(--ease);
+  pointer-events: none;
 }
 .card:hover {
   border-color: var(--accent-line);
+  transform: translateY(-2px);
+  box-shadow: var(--shadow), 0 0 22px var(--accent-glow);
+}
+.card:hover::before {
+  opacity: 0.9;
+}
+@media (prefers-reduced-motion: reduce) {
+  .card {
+    transition: border-color 0.25s var(--ease);
+  }
+  .card:hover {
+    transform: none;
+  }
 }
 
 .tag {
@@ -269,3 +327,122 @@ svg {
     transition: none;
   }
 }
+
+/* ---- PRO scroll UI — flowing aurora + scroll progress (CSS-only, CSP-safe) -
+   Native scroll-driven animations (animation-timeline). Degrades to a gentle
+   continuous drift where unsupported; fully disabled under reduced-motion. */
+
+/* A thin royal line at the very top that fills as the page scrolls. */
+.scroll-progress {
+  position: fixed;
+  inset: 0 0 auto 0;
+  height: 2px;
+  z-index: 200;
+  background: linear-gradient(90deg, var(--accent), var(--accent-2));
+  box-shadow: 0 0 14px var(--accent-glow);
+  transform: scaleX(0);
+  transform-origin: 0 50%;
+  pointer-events: none;
+}
+@supports (animation-timeline: scroll()) {
+  .scroll-progress {
+    animation: progressGrow linear both;
+    animation-timeline: scroll(root block);
+  }
+}
+@keyframes progressGrow {
+  to {
+    transform: scaleX(1);
+  }
+}
+
+/* ---- Cinematic backing: the Bat-Computer board, panned by scroll -----------
+   A fixed full-screen image (dark/light per theme) that pans S → E → SE → NE as
+   the page scrolls. A scrim keeps text legible (darker on the left for the hero
+   headline). GPU transform only; static + legible under reduced-motion. */
+.site-bg {
+  position: fixed;
+  inset: 0;
+  z-index: -2;
+  overflow: hidden;
+  background: var(--bg);
+}
+.site-bg__img {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  width: 168%;
+  height: 168%;
+  object-fit: cover;
+  transform: translate(-50%, -50%);
+  will-change: transform;
+}
+.site-bg__img--light {
+  display: none;
+}
+[data-theme="light"] .site-bg__img--dark {
+  display: none;
+}
+[data-theme="light"] .site-bg__img--light {
+  display: block;
+}
+.site-bg__scrim {
+  position: absolute;
+  inset: 0;
+  background:
+    linear-gradient(
+      90deg,
+      rgba(9, 12, 20, 0.85) 0%,
+      rgba(9, 12, 20, 0.52) 44%,
+      rgba(9, 12, 20, 0.34) 100%
+    ),
+    linear-gradient(
+      180deg,
+      rgba(9, 12, 20, 0.18) 0%,
+      rgba(9, 12, 20, 0.5) 58%,
+      rgba(9, 12, 20, 0.82) 100%
+    );
+}
+[data-theme="light"] .site-bg__scrim {
+  background:
+    linear-gradient(
+      90deg,
+      rgba(246, 248, 251, 0.86) 0%,
+      rgba(246, 248, 251, 0.56) 44%,
+      rgba(246, 248, 251, 0.4) 100%
+    ),
+    linear-gradient(
+      180deg,
+      rgba(246, 248, 251, 0.22) 0%,
+      rgba(246, 248, 251, 0.54) 58%,
+      rgba(246, 248, 251, 0.82) 100%
+    );
+}
+@supports (animation-timeline: scroll()) {
+  @media (prefers-reduced-motion: no-preference) {
+    .site-bg__img {
+      animation: bgPan linear both;
+      animation-timeline: scroll(root block);
+    }
+  }
+}
+@keyframes bgPan {
+  0% {
+    transform: translate(-50%, -38%);
+  }
+  35% {
+    transform: translate(-50%, -62%);
+  }
+  68% {
+    transform: translate(-62%, -62%);
+  }
+  100% {
+    transform: translate(-62%, -38%);
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .scroll-progress {
+    display: none;
+  }
+}

src/styles/tokens.css

@@ -17,22 +17,26 @@
   --text-dim: #9aa7b8;
   --text-faint: #61708a;
 
-  /* Accent — single restrained teal */
+  /* Accent — electric cyan→magenta, merged with the Bat-Computer board */
-  --accent: #5eead4;
+  --accent: #3fbaf5; /* cyan-blue (the board's left side) */
-  --accent-strong: #2dd4bf;
+  --accent-2: #e879f9; /* magenta (the board's right side) */
-  --accent-ink: #042f2a; /* text on an accent fill */
+  --accent-strong: #1f9fe0;
-  --accent-dim: rgba(94, 234, 212, 0.12);
+  --accent-ink: #04161f; /* text on an accent fill */
-  --accent-line: rgba(94, 234, 212, 0.28);
+  --accent-dim: rgba(63, 186, 245, 0.12);
-  --accent-glow: rgba(45, 212, 191, 0.22);
+  --accent-line: rgba(63, 186, 245, 0.3);
+  --accent-glow: rgba(63, 186, 245, 0.32);
 
   /* Grid / topology motif */
   --grid-line: rgba(148, 163, 184, 0.06);
 
-  /* Fonts — system stacks only (zero external requests). */
+  /* Fonts — system stacks (zero external requests) + one self-hosted display face. */
   --font-sans: "Inter var", ui-sans-serif, system-ui, -apple-system, "Segoe UI",
     Roboto, Helvetica, Arial, sans-serif;
   --font-mono: ui-monospace, "JetBrains Mono", "Cascadia Code", "SF Mono",
     Menlo, Consolas, "Liberation Mono", monospace;
+  /* Display face — Chakra Petch (self-hosted woff2, OFL). Used ONLY on the hero
+     name + section titles; body stays in --font-sans for readability. */
+  --font-display: "Chakra Petch", var(--font-sans);
 
   /* Fluid type scale */
   --step--1: clamp(0.8rem, 0.76rem + 0.2vw, 0.9rem);
@@ -77,12 +81,15 @@
   --text-dim: #475467;
   --text-faint: #6b7689;
 
-  --accent: #0d9488;
+  /* Accent — same electric cyan→magenta as dark, dropped in value for contrast
-  --accent-strong: #0f766e;
+     on the light sandstone board. */
-  --accent-ink: #ecfdf5;
+  --accent: #0c8fce; /* deeper cyan reads on white */
-  --accent-dim: rgba(13, 148, 136, 0.1);
+  --accent-2: #c026d3; /* magenta partner */
-  --accent-line: rgba(13, 148, 136, 0.3);
+  --accent-strong: #0a72a6;
-  --accent-glow: rgba(13, 148, 136, 0.16);
+  --accent-ink: #f2fbff;
+  --accent-dim: rgba(12, 143, 206, 0.1);
+  --accent-line: rgba(12, 143, 206, 0.32);
+  --accent-glow: rgba(192, 38, 211, 0.16);
 
   --grid-line: rgba(15, 23, 42, 0.05);