diff --git a/src/styles/base.css b/src/styles/base.css
new file mode 100644
index 0000000..c1defcd
--- /dev/null
+++ b/src/styles/base.css
@@ -0,0 +1,57 @@
+/* Base layer: html/body defaults, links, focus rings, text selection. */
+@layer base {
+  html {
+    background: var(--color-bg);
+    scroll-behavior: smooth;
+  }
+
+  body {
+    min-block-size: 100vh;
+    min-block-size: 100dvh;
+    display: flex;
+    flex-direction: column;
+    background: var(--color-bg);
+    color: var(--color-fg);
+    font-family: var(--font-sans);
+    font-size: var(--fs-body);
+    line-height: var(--leading-snug);
+    transition:
+      background-color 200ms ease,
+      color 200ms ease;
+  }
+
+  address {
+    font-style: normal;
+  }
+
+  a {
+    color: var(--color-link);
+    text-decoration-thickness: 0.08em;
+    text-underline-offset: 0.18em;
+    transition: color 150ms ease;
+  }
+
+  a:hover {
+    color: var(--color-link-hover);
+  }
+
+  a:active {
+    opacity: 0.85;
+    transition: opacity 80ms ease;
+  }
+
+  :focus-visible {
+    outline: 2px solid var(--color-accent);
+    outline-offset: 3px;
+  }
+
+  main:focus-visible {
+    outline: 2px solid var(--color-accent);
+    outline-offset: -2px;
+  }
+
+  ::selection {
+    background: var(--color-selection-bg);
+    color: var(--color-fg);
+  }
+}
diff --git a/src/styles/components/headings-and-tags.css b/src/styles/components/headings-and-tags.css
new file mode 100644
index 0000000..6e82b97
--- /dev/null
+++ b/src/styles/components/headings-and-tags.css
@@ -0,0 +1,160 @@
+/* Section headings, breadcrumbs, tag cloud / list / filter. */
+@layer components {
+  .eyebrow {
+    margin: 0 0 var(--space-3);
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+    line-height: 1.4;
+    font-weight: var(--weight-semibold);
+    letter-spacing: 0.08em;
+    text-transform: uppercase;
+  }
+
+  .section-heading {
+    width: 100%;
+    display: flex;
+    align-items: baseline;
+    justify-content: space-between;
+    gap: var(--space-4);
+    flex-wrap: wrap;
+    margin-bottom: var(--space-4);
+    padding-top: var(--space-6);
+  }
+
+  :where(.section-heading, .archive-year, .project-section, .facts, .at-a-glance) h2 {
+    font-size: var(--fs-lg);
+    font-weight: var(--weight-semibold);
+    line-height: var(--leading-snug);
+  }
+
+  .section-heading a {
+    min-height: 44px;
+    display: inline-flex;
+    align-items: center;
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+    text-decoration: none;
+  }
+
+  .section-heading a:hover {
+    color: var(--color-fg);
+    text-decoration: underline;
+    text-underline-offset: 0.25em;
+  }
+
+  .section-heading__text {
+    flex: 1 1 11rem;
+    min-width: 0;
+  }
+
+  .section-heading__text p {
+    max-width: var(--measure);
+    margin-top: var(--space-1);
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+    line-height: 1.4;
+  }
+
+  .breadcrumbs {
+    margin: 0 0 var(--space-3);
+    padding: 0;
+    list-style: none;
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--space-2);
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+  }
+
+  .breadcrumbs li {
+    display: inline-flex;
+    align-items: baseline;
+    min-width: 0;
+  }
+
+  .breadcrumbs li:not(:last-child)::after {
+    content: '›';
+    margin-left: var(--space-2);
+    color: var(--color-rule-medium);
+    flex: none;
+  }
+
+  .breadcrumbs a {
+    color: var(--color-muted);
+    text-decoration: none;
+  }
+
+  .breadcrumbs a:hover {
+    color: var(--color-fg);
+    text-decoration: underline;
+    text-underline-offset: 0.25em;
+  }
+
+  .breadcrumbs [aria-current='page'] {
+    color: var(--color-fg);
+  }
+
+  .tag-cloud {
+    margin-top: var(--space-2);
+  }
+
+  .tag-list {
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--space-1) var(--space-2);
+    margin: var(--space-2) 0 0;
+    padding: 0;
+    list-style: none;
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+  }
+
+  .tag-list a {
+    min-height: 2rem;
+    display: inline-flex;
+    align-items: center;
+    padding-inline: var(--space-1);
+    margin-inline: calc(-1 * var(--space-1));
+    color: var(--color-muted);
+    text-decoration: none;
+  }
+
+  .tag-list a::before {
+    content: '#';
+    color: var(--color-rule-medium);
+  }
+
+  .tag-list .tag-more::before {
+    content: none;
+  }
+
+  .tag-list .tag-count {
+    margin-inline-start: 0.35em;
+    padding: 0 0.4em;
+    border-radius: var(--radius-pill);
+    background: var(--color-code-bg);
+    color: var(--color-fg);
+    font-size: var(--fs-caption);
+    font-variant-numeric: tabular-nums;
+  }
+
+  .tag-list a:hover,
+  .tag-list a[aria-current='page'] {
+    color: var(--color-fg);
+  }
+
+  .tag-filter {
+    display: flex;
+    align-items: baseline;
+    flex-wrap: wrap;
+    gap: var(--space-2) var(--space-4);
+    margin: 0 0 var(--space-8);
+    padding-block: var(--space-3);
+    border-block: 1px solid var(--color-rule);
+  }
+
+  .tag-filter > span {
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+  }
+}
diff --git a/src/styles/components/listings.css b/src/styles/components/listings.css
new file mode 100644
index 0000000..871171b
--- /dev/null
+++ b/src/styles/components/listings.css
@@ -0,0 +1,198 @@
+/* Article list (+ timeline variant), project-list grid, entry thumbnails. */
+@layer components {
+  .article-list,
+  .project-list {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+    width: 100%;
+  }
+
+  .project-list {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
+    gap: var(--space-4);
+    align-items: stretch;
+  }
+
+  .article-list > li {
+    display: grid;
+    grid-template-columns: 4.5rem minmax(0, 1fr) minmax(6rem, 8rem);
+    grid-template-areas: 'date content thumb';
+    align-items: center;
+    gap: var(--space-4);
+    padding-block: var(--space-6);
+    border-top: 1px solid var(--color-rule);
+  }
+
+  .article-list > li:first-child {
+    border-top: 0;
+  }
+
+  .article-list time {
+    grid-area: date;
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+    text-align: end;
+  }
+
+  .article-list > li > article {
+    grid-area: content;
+    min-width: 0;
+    padding-right: var(--space-3);
+  }
+
+  .article-list h3,
+  .project-list h3 {
+    font-size: var(--fs-base);
+    line-height: var(--leading-snug);
+  }
+
+  .project-list h3 {
+    color: var(--color-fg);
+    font-weight: var(--weight-semibold);
+  }
+
+  .article-list .entry-title {
+    display: inline-flex;
+    align-items: center;
+    min-height: 28px;
+    color: var(--color-fg);
+    font-weight: var(--weight-semibold);
+    text-decoration: none;
+  }
+
+  .article-list .entry-title:hover {
+    color: var(--color-link-hover);
+  }
+
+  .article-list p,
+  .project-list p {
+    margin: var(--space-1) 0 0;
+    color: var(--color-muted);
+    font-size: var(--fs-base);
+    line-height: var(--leading-snug);
+  }
+
+  .entry-thumbnail {
+    display: block;
+    overflow: hidden;
+    border: 1px solid var(--color-rule);
+    border-radius: var(--radius-md);
+    background: var(--color-code-bg);
+    aspect-ratio: 4 / 3;
+    transition: border-color 150ms ease;
+  }
+
+  .entry-thumbnail img {
+    display: block;
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+    object-position: center center;
+  }
+
+  a.entry-thumbnail {
+    text-decoration: none;
+  }
+
+  a.entry-thumbnail:hover,
+  a.entry-thumbnail:focus-visible {
+    border-color: var(--color-rule-strong);
+  }
+
+  .article-list > li:focus-within .entry-thumbnail {
+    border-color: var(--color-rule-strong);
+  }
+
+  .article-thumbnail {
+    grid-area: thumb;
+    align-self: center;
+  }
+
+  .article-list--timeline {
+    --timeline-date-column: 6.25rem;
+    --timeline-marker-column: 1.125rem;
+    --timeline-marker-offset: 0.5625rem;
+    --timeline-gap: var(--space-4);
+    --timeline-date-offset: 1.125rem;
+    --timeline-dot-top: 50%;
+    --timeline-marker-center: calc(
+      var(--timeline-date-column) + var(--timeline-gap) + var(--timeline-marker-offset)
+    );
+  }
+
+  .article-list--timeline > li {
+    position: relative;
+    grid-template-columns:
+      var(--timeline-date-column) var(--timeline-marker-column) minmax(0, 1fr)
+      minmax(6rem, 8rem);
+    grid-template-areas: 'date marker content thumb';
+    column-gap: var(--timeline-gap);
+    border-top: 0;
+  }
+
+  .article-list--timeline > li::before,
+  .article-list--timeline > li::after {
+    content: '';
+    position: absolute;
+    left: var(--timeline-marker-center);
+    z-index: 0;
+    pointer-events: none;
+  }
+
+  .article-list--timeline > li::before {
+    inset-block: 0;
+    width: 1px;
+    transform: translateX(-50%);
+    background: var(--color-rule-medium);
+  }
+
+  .article-list--timeline > li:first-child::before {
+    inset-block-start: var(--timeline-dot-top);
+  }
+
+  .article-list--timeline > li:last-child::before {
+    inset-block-end: calc(100% - var(--timeline-dot-top));
+  }
+
+  .article-list--timeline > li:only-child::before {
+    content: none;
+  }
+
+  .article-list--timeline > li::after {
+    top: var(--timeline-dot-top);
+    width: 0.75rem;
+    height: 0.75rem;
+    border: 2px solid var(--color-bg);
+    border-radius: var(--radius-pill);
+    background: var(--color-accent);
+    box-shadow: 0 0 0 1px var(--color-rule-strong);
+    transform: translate(-50%, -50%);
+  }
+
+  .article-list--timeline > li > article,
+  .article-list--timeline time,
+  .article-list--timeline .entry-thumbnail {
+    position: relative;
+    z-index: 1;
+  }
+
+  .article-list--timeline time {
+    justify-self: end;
+    align-self: center;
+    width: max-content;
+    min-block-size: 0;
+    margin-inline-end: calc(-1 * var(--timeline-date-offset));
+    padding-inline-end: 4px;
+    display: inline-block;
+    color: var(--color-muted);
+    font-size: var(--fs-sm);
+    line-height: 1.2;
+    text-align: center;
+    white-space: nowrap;
+    top: 5px;
+    transform: rotate(-45deg);
+    transform-origin: right center;
+  }
+}
diff --git a/src/styles/components/post.css b/src/styles/components/post.css
new file mode 100644
index 0000000..56e9bdb
--- /dev/null
+++ b/src/styles/components/post.css
@@ -0,0 +1,212 @@
+/* At-a-glance, facts, media figures, post nav, TOC, gallery, related posts. */
+@layer components {
+  .at-a-glance {
+    margin-top: var(--space-8);
+    padding-block: var(--space-5);
+    border-block: 1px solid var(--color-rule);
+  }
+
+  .at-a-glance dl,
+  .facts dl {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-2);
+    margin: var(--space-4) 0 0;
+  }
+
+  .at-a-glance__row,
+  .facts dl > div {
+    display: grid;
+    grid-template-columns: minmax(6rem, max-content) minmax(0, 1fr);
+    gap: var(--space-4);
+  }
+
+  .at-a-glance dt,
+  .facts dt {
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+  }
+
+  .facts {
+    margin-top: var(--space-8);
+    padding-top: var(--space-6);
+    border-top: 1px solid var(--color-rule);
+  }
+
+  /* Let prose wrap beside .at-a-glance and continue below it. */
+  @media (min-width: 1100px) {
+    .post > .at-a-glance {
+      float: right;
+      width: min(18rem, 42%);
+      margin-top: var(--space-8);
+      margin-right: 0;
+      margin-bottom: var(--space-4);
+      margin-left: var(--space-8);
+    }
+
+    .post > .post-media,
+    .post > .post-gallery,
+    .related-posts,
+    .post-nav {
+      clear: both;
+    }
+  }
+
+  .post-media {
+    max-inline-size: min(100%, var(--measure-wide));
+    margin: var(--space-8) 0 0;
+  }
+
+  .post-media img,
+  .post-media video {
+    border: 1px solid var(--color-rule);
+    border-radius: var(--radius-md);
+    background: var(--color-code-bg);
+    width: 100%;
+  }
+
+  .post-media figcaption,
+  .media-transcript {
+    max-width: var(--measure);
+    margin-top: var(--space-2);
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+    line-height: 1.45;
+  }
+
+  .media-transcript strong {
+    color: var(--color-fg);
+    font-weight: var(--weight-semibold);
+  }
+
+  .post-nav {
+    margin-top: var(--space-12);
+    padding-top: var(--space-6);
+    border-top: 1px solid var(--color-rule);
+  }
+
+  .post-nav__list {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
+    gap: var(--space-4);
+    list-style: none;
+    padding: 0;
+    margin: 0;
+  }
+
+  .post-nav__next {
+    justify-self: end;
+  }
+
+  .post-nav a {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-1);
+    padding: var(--space-3) var(--space-4);
+    border: 1px solid var(--color-rule);
+    border-radius: var(--radius-md);
+    color: var(--color-fg);
+    text-decoration: none;
+    min-height: 44px;
+    transition: border-color 150ms ease;
+  }
+
+  .post-nav a:hover,
+  .post-nav a:focus-visible {
+    border-color: var(--color-rule-strong);
+  }
+
+  .post-nav a.next {
+    text-align: end;
+  }
+
+  .post-nav .post-nav__label {
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+  }
+
+  .post-nav .post-nav__title {
+    color: var(--color-fg);
+    font-weight: var(--weight-semibold);
+  }
+
+  .post-toc {
+    margin-top: var(--space-6);
+    padding: var(--space-3) var(--space-4);
+    border-inline-start: 2px solid var(--color-rule);
+    font-size: var(--fs-caption);
+    color: var(--color-muted);
+    max-height: 60vh;
+    overflow-y: auto;
+  }
+
+  .post-header h1,
+  .post-nav .post-nav__title,
+  .project-card h3 {
+    overflow-wrap: anywhere;
+  }
+
+  .post-toc ol {
+    list-style: none;
+    padding: 0;
+    margin: 0;
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-1);
+  }
+
+  .post-toc a {
+    display: inline-flex;
+    align-items: center;
+    min-block-size: 24px;
+    padding-block: 2px;
+    color: var(--color-muted);
+    text-decoration: none;
+  }
+
+  .post-toc a:hover,
+  .post-toc a:focus-visible {
+    color: var(--color-fg);
+  }
+
+  .post-gallery {
+    list-style: none;
+    padding: 0;
+    margin: var(--space-8) 0 0;
+    display: grid;
+    gap: var(--space-6);
+  }
+
+  .post > .post-gallery {
+    width: 100%;
+  }
+
+  .post-gallery .post-media {
+    max-inline-size: 100%;
+    margin: 0;
+  }
+
+  .external-link-icon {
+    display: inline-block;
+    margin-inline-start: 0.25em;
+    vertical-align: -0.125em;
+    opacity: 0.85;
+  }
+
+  .related-posts {
+    margin-top: var(--space-12);
+    padding-top: var(--space-6);
+    border-top: 1px solid var(--color-rule);
+  }
+
+  .related-posts h2 {
+    font-size: var(--fs-lg);
+    font-weight: var(--weight-semibold);
+    margin-bottom: var(--space-4);
+  }
+
+  .empty-state {
+    max-width: var(--measure);
+    padding-block: var(--space-6);
+  }
+}
diff --git a/src/styles/components/project-card.css b/src/styles/components/project-card.css
new file mode 100644
index 0000000..975666d
--- /dev/null
+++ b/src/styles/components/project-card.css
@@ -0,0 +1,155 @@
+/* Project card: thumbnail, summary, stretched-link Open control, links. */
+@layer components {
+  .project-card {
+    position: relative;
+    display: grid;
+    grid-template-columns: 1fr;
+    grid-template-areas:
+      'thumb'
+      'summary';
+    min-width: 0;
+    overflow: hidden;
+    border: 1px solid var(--color-rule);
+    border-radius: var(--radius-lg);
+    background: var(--color-bg);
+    transition: border-color 150ms ease;
+  }
+
+  .project-card:hover,
+  .project-card:focus-within,
+  .project-card:target {
+    border-color: var(--color-rule-strong);
+  }
+
+  .project-card .project-thumbnail {
+    grid-area: thumb;
+    width: 100%;
+    height: auto;
+    border: 0;
+    border-bottom: 1px solid var(--color-rule);
+    border-radius: 0;
+    aspect-ratio: 4 / 3;
+  }
+
+  .project-card__summary {
+    grid-area: summary;
+    display: flex;
+    flex-direction: column;
+    justify-content: space-between;
+    gap: var(--space-3);
+    min-width: 0;
+    padding: var(--space-3) var(--space-4);
+  }
+
+  .project-card p {
+    margin: 0;
+  }
+
+  .project-card .project-description {
+    color: var(--color-fg);
+    font-size: var(--fs-base);
+    line-height: var(--leading-snug);
+  }
+
+  .project-card__head {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-1);
+    min-width: 0;
+  }
+
+  .project-card__actions {
+    display: flex;
+    align-items: center;
+    flex-wrap: wrap;
+    gap: var(--space-2) var(--space-3);
+    margin-top: var(--space-3);
+  }
+
+  /* Stretched link: the Open control's overlay covers the whole card so any
+     click opens the project website. The Article link sits above the overlay
+     via a higher z-index and stays independently clickable. */
+  .project-card__open::after {
+    content: '';
+    position: absolute;
+    inset: 0;
+    z-index: 1;
+    /* Cover the whole card, not the Open button's pill radius. The card's own
+       overflow:hidden + border-radius clips this to the rounded card shape. */
+    border-radius: 0;
+  }
+
+  .project-card__open {
+    margin-left: auto;
+    display: inline-flex;
+    align-items: center;
+    gap: 0.3em;
+    min-height: 36px;
+    padding: 0.25em 0.85em;
+    border: 1px solid var(--color-rule-strong);
+    border-radius: var(--radius-pill);
+    background: var(--color-bg);
+    color: var(--color-link);
+    font-size: var(--fs-caption);
+    font-weight: var(--weight-semibold);
+    text-decoration: none;
+    transition:
+      background-color 150ms ease,
+      border-color 150ms ease,
+      color 150ms ease;
+  }
+
+  .project-card:hover .project-card__open,
+  .project-card:focus-within .project-card__open {
+    border-color: var(--color-link);
+    background: var(--color-callout-bg);
+    color: var(--color-link-hover);
+  }
+
+  .project-article-link {
+    position: relative;
+    z-index: 2;
+    display: inline-flex;
+    align-items: center;
+    gap: 0.3em;
+    min-height: 36px;
+    color: var(--color-link);
+    font-size: var(--fs-caption);
+    font-weight: var(--weight-medium);
+    text-decoration: none;
+  }
+
+  .project-article-link:hover,
+  .project-article-link:focus-visible {
+    color: var(--color-link-hover);
+    text-decoration: underline;
+  }
+
+  .project-links {
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--space-1) var(--space-3);
+    margin: var(--space-3) 0 0;
+    padding: 0;
+    list-style: none;
+  }
+
+  .project-links a {
+    min-height: 44px;
+    min-width: 44px;
+    display: inline-flex;
+    align-items: center;
+    color: var(--color-link);
+  }
+
+  .project-links a:hover,
+  .project-links a:focus-visible {
+    color: var(--color-link-hover);
+  }
+
+  .project-links a .download-indicator {
+    margin-left: 0.25em;
+    color: var(--color-muted);
+    font-size: 0.85em;
+  }
+}
diff --git a/src/styles/components/prose.css b/src/styles/components/prose.css
new file mode 100644
index 0000000..2def8bb
--- /dev/null
+++ b/src/styles/components/prose.css
@@ -0,0 +1,196 @@
+/* Long-form article prose: headings, lists, quotes, tables, code (Shiki). */
+@layer components {
+  .prose {
+    max-inline-size: var(--measure);
+    line-height: var(--leading-prose);
+    hyphens: auto;
+    hyphenate-limit-chars: 7 3 3;
+  }
+
+  .prose > * + * {
+    margin-top: 1.05em;
+  }
+
+  .prose > h2:first-child,
+  .prose > h3:first-child {
+    margin-top: 0;
+  }
+
+  .prose p {
+    text-wrap: pretty;
+  }
+
+  .prose h2,
+  .prose h3 {
+    position: relative;
+    color: var(--color-fg);
+    line-height: var(--leading-tight);
+    scroll-margin-top: var(--space-8);
+  }
+
+  .prose h2 {
+    margin-top: var(--space-12);
+    font-size: var(--fs-xl);
+    font-weight: var(--weight-semibold);
+  }
+
+  .prose h3 {
+    margin-top: var(--space-8);
+    font-size: var(--fs-lg);
+    font-weight: var(--weight-semibold);
+  }
+
+  .prose h2:target,
+  .prose h3:target {
+    background: var(--color-callout-bg);
+    border-inline-start: 2px solid var(--color-accent);
+    padding-inline-start: var(--space-3);
+    margin-inline-start: calc(-1 * var(--space-3) - 2px);
+  }
+
+  .prose .heading-anchor {
+    margin-inline-start: 0.4em;
+    color: var(--color-muted);
+    font-weight: var(--weight-regular);
+    font-size: 0.85em;
+    text-decoration: none;
+    opacity: 0;
+    transition: opacity 150ms ease;
+  }
+
+  .prose .heading-anchor:focus-visible {
+    opacity: 1;
+    text-decoration: underline;
+  }
+
+  .prose .heading-anchor::before {
+    content: '#';
+  }
+
+  .prose h2:hover .heading-anchor,
+  .prose h3:hover .heading-anchor,
+  .prose .heading-anchor:hover {
+    opacity: 1;
+  }
+
+  @media (hover: none) {
+    .prose .heading-anchor {
+      opacity: 1;
+    }
+  }
+
+  .prose ul,
+  .prose ol {
+    padding-inline-start: 1.25rem;
+  }
+
+  .prose li + li {
+    margin-top: var(--space-1);
+  }
+
+  .prose strong {
+    font-weight: var(--weight-bold);
+    color: var(--color-fg);
+  }
+
+  .prose em {
+    font-style: italic;
+  }
+
+  .prose blockquote {
+    margin-inline: 0;
+    padding: var(--space-2) var(--space-4);
+    border-inline-start: 3px solid var(--color-rule-medium);
+    background: var(--color-callout-bg);
+    color: var(--color-muted);
+    font-style: italic;
+  }
+
+  .prose blockquote > * + * {
+    margin-top: 0.6em;
+  }
+
+  .prose hr {
+    margin-block: var(--space-8);
+    border: 0;
+    height: 1px;
+    background: var(--color-rule);
+  }
+
+  .prose table {
+    width: 100%;
+    max-width: 100%;
+    border-collapse: collapse;
+    font-size: 0.95em;
+    display: block;
+    overflow-x: auto;
+  }
+
+  .prose thead {
+    background: var(--color-code-bg);
+    text-align: start;
+  }
+
+  .prose th,
+  .prose td {
+    padding: var(--space-2) var(--space-3);
+    border-bottom: 1px solid var(--color-rule);
+    vertical-align: top;
+  }
+
+  .prose th {
+    font-weight: var(--weight-semibold);
+  }
+
+  .prose code {
+    font-family: var(--font-mono);
+    font-size: 0.88em;
+    background: var(--color-code-bg);
+    border-radius: var(--radius-sm);
+    padding: 0.08em 0.25em;
+  }
+
+  .prose pre {
+    max-width: 100%;
+    overflow-x: auto;
+    scrollbar-gutter: stable;
+    padding: var(--space-4);
+    background: var(--color-code-bg);
+    border: 1px solid var(--color-rule);
+    border-radius: var(--radius-md);
+    line-height: 1.55;
+    scrollbar-width: thin;
+    scrollbar-color: var(--color-rule-medium) var(--color-code-bg);
+  }
+
+  .prose pre::-webkit-scrollbar {
+    height: 8px;
+  }
+
+  .prose pre::-webkit-scrollbar-track {
+    background: var(--color-code-bg);
+  }
+
+  .prose pre::-webkit-scrollbar-thumb {
+    background: var(--color-rule-medium);
+    border-radius: var(--radius-sm);
+  }
+
+  .prose pre code {
+    background: transparent;
+    padding: 0;
+  }
+
+  /* Shiki dual-theme: defaultColor: false emits --shiki-light / --shiki-dark
+     vars on every token; light-dark() picks the active variant from
+     color-scheme on :root. */
+  .prose pre.astro-code,
+  .prose pre.astro-code code,
+  .prose pre.astro-code span {
+    color: light-dark(var(--shiki-light), var(--shiki-dark));
+    background-color: light-dark(
+      var(--shiki-light-bg, var(--color-code-bg)),
+      var(--shiki-dark-bg, var(--color-code-bg))
+    );
+  }
+}
diff --git a/src/styles/components/sections.css b/src/styles/components/sections.css
new file mode 100644
index 0000000..398ab95
--- /dev/null
+++ b/src/styles/components/sections.css
@@ -0,0 +1,125 @@
+/* Post-content width wrappers, archive/project sections, about, starting points. */
+@layer components {
+  .post > .post-media {
+    max-width: var(--measure);
+    margin-inline: auto;
+  }
+
+  .post > .prose {
+    max-width: var(--measure-wide);
+    max-inline-size: var(--measure-wide);
+    margin-inline: auto;
+  }
+
+  .post > .at-a-glance,
+  .post > .post-thumbnail,
+  .post > .post-gallery,
+  .post-nav {
+    max-width: var(--measure-wide);
+    margin-inline: auto;
+  }
+
+  .archive-year,
+  .project-section {
+    width: 100%;
+  }
+
+  .archive-year + .archive-year,
+  .project-section + .project-section {
+    margin-top: var(--space-10);
+  }
+
+  .archive-year h2,
+  .project-section h2 {
+    margin-bottom: var(--space-3);
+  }
+
+  .about-section {
+    width: 100%;
+    margin-top: var(--space-10);
+  }
+
+  .about-section--starting-points {
+    margin-top: var(--space-6);
+    padding-top: var(--space-6);
+    border-top: 1px solid var(--color-rule);
+  }
+
+  .about-section--starting-points .section-heading {
+    align-items: flex-start;
+    padding-top: 0;
+  }
+
+  .about-section.facts {
+    max-width: none;
+  }
+
+  .about-section.facts > .prose {
+    margin-top: var(--space-4);
+  }
+
+  .prose.about-copy {
+    width: 100%;
+    max-inline-size: none;
+  }
+
+  .starting-points {
+    display: grid;
+    grid-template-columns: repeat(5, minmax(0, 1fr));
+    gap: var(--space-3);
+    margin: 0;
+    padding: var(--space-4) 0 0;
+    list-style: none;
+  }
+
+  .starting-points > li {
+    min-width: 0;
+  }
+
+  .starting-point__thumbnail {
+    aspect-ratio: 4 / 3;
+  }
+
+  .starting-point__body {
+    min-width: 0;
+    padding-block-start: var(--space-2);
+  }
+
+  .starting-point__body h3 {
+    font-size: var(--fs-sm);
+    font-weight: var(--weight-semibold);
+    line-height: var(--leading-snug);
+  }
+
+  .starting-point__body a {
+    color: var(--color-fg);
+    text-decoration: none;
+  }
+
+  .starting-point__body a:hover {
+    color: var(--color-link-hover);
+    text-decoration: underline;
+    text-underline-offset: 0.2em;
+  }
+
+  .starting-point__body p {
+    margin-top: var(--space-1);
+    color: var(--color-muted);
+    font-size: var(--fs-xs);
+    line-height: var(--leading-snug);
+  }
+
+  .starting-points > li:focus-within .entry-thumbnail {
+    border-color: var(--color-rule-strong);
+  }
+
+  .about-links {
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--space-1) var(--space-4);
+  }
+
+  .post > .prose {
+    margin-top: var(--space-8);
+  }
+}
diff --git a/src/styles/components/theme-switcher.css b/src/styles/components/theme-switcher.css
new file mode 100644
index 0000000..51add57
--- /dev/null
+++ b/src/styles/components/theme-switcher.css
@@ -0,0 +1,118 @@
+/* Light/dark theme toggle switch + forced-colors fallback. */
+@layer components {
+  .theme-switcher {
+    --switcher-w: 2.75rem;
+    --switcher-h: 1.5rem;
+    --switcher-icon: 1.05rem;
+    --switcher-gap: 0.22rem;
+
+    position: relative;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: var(--switcher-w);
+    height: var(--switcher-h);
+    /* Adjacent header targets remain at least 44px apart while the visual
+       track stays compact. */
+    margin: max(var(--space-2), calc((44px - var(--switcher-h)) / 2)) 0;
+    overflow: hidden;
+    border: 1px solid var(--color-rule-medium);
+    border-radius: var(--radius-pill);
+    appearance: none;
+    cursor: pointer;
+    background: var(--theme-switcher-track);
+    color: inherit;
+    transition:
+      background-color 200ms ease,
+      border-color 150ms ease;
+    box-shadow: inset 0 1px 2px rgb(0 0 0 / 18%);
+  }
+
+  .theme-switcher:hover {
+    border-color: var(--color-rule-strong);
+  }
+
+  .no-js .theme-switcher {
+    display: none !important;
+  }
+
+  .theme-switcher-icon {
+    position: absolute;
+    top: 50%;
+    left: 0;
+    width: var(--switcher-icon);
+    height: var(--switcher-icon);
+    pointer-events: none;
+    transition:
+      transform 180ms ease,
+      opacity 180ms ease,
+      color 180ms ease;
+  }
+
+  .theme-switcher-icon-sun {
+    color: var(--theme-switcher-icon-light);
+  }
+
+  .theme-switcher-icon-moon {
+    color: var(--theme-switcher-icon-dark);
+  }
+
+  .theme-switcher[aria-pressed='false'] .theme-switcher-icon-sun {
+    transform: translateY(-50%)
+      translateX(calc(var(--switcher-w) - var(--switcher-icon) - var(--switcher-gap)));
+    opacity: 1;
+  }
+
+  .theme-switcher[aria-pressed='false'] .theme-switcher-icon-moon {
+    transform: translateY(-50%) translateX(calc(-1 * var(--switcher-icon)));
+    opacity: 0;
+  }
+
+  .theme-switcher[aria-pressed='true'] .theme-switcher-icon-sun {
+    transform: translateY(-50%) translateX(var(--switcher-w));
+    opacity: 0;
+  }
+
+  .theme-switcher[aria-pressed='true'] .theme-switcher-icon-moon {
+    transform: translateY(-50%) translateX(var(--switcher-gap));
+    opacity: 1;
+  }
+
+  /* High-contrast / forced-colors fallback: render a text label. */
+  @media (forced-colors: active) {
+    .theme-switcher {
+      width: auto;
+      height: auto;
+      min-block-size: 44px;
+      min-inline-size: 44px;
+      display: inline-flex;
+      align-items: center;
+      justify-content: center;
+      padding: var(--space-1) var(--space-2);
+      overflow: visible;
+      background: ButtonFace;
+      color: ButtonText;
+      border: 1px solid ButtonBorder;
+      box-shadow: none;
+    }
+
+    .theme-switcher-icon {
+      display: none;
+    }
+
+    .theme-switcher::before {
+      content: 'Light';
+      position: static;
+      width: auto;
+      height: auto;
+      transform: none;
+      background: transparent;
+      border-radius: 0;
+    }
+
+    .theme-switcher[aria-pressed='true']::before {
+      content: 'Dark';
+      transform: none;
+    }
+  }
+}
diff --git a/src/styles/components/thumbnails.css b/src/styles/components/thumbnails.css
new file mode 100644
index 0000000..a5b59f7
--- /dev/null
+++ b/src/styles/components/thumbnails.css
@@ -0,0 +1,243 @@
+/* Post thumbnail (iframe embed) and click-to-play video thumbnail. */
+@layer components {
+  .post-thumbnail {
+    margin: 0;
+  }
+
+  .post-thumbnail img {
+    width: 100%;
+    border: 1px solid var(--color-rule);
+    border-radius: var(--radius-md);
+    background: var(--color-code-bg);
+  }
+
+  .post-thumbnail--iframe {
+    position: relative;
+    aspect-ratio: var(--post-thumbnail-aspect, 16 / 9);
+    overflow: hidden;
+    border: 1px solid var(--color-rule);
+    border-radius: var(--radius-md);
+    background: var(--color-code-bg);
+  }
+
+  .post-thumbnail--iframe picture,
+  .post-thumbnail--iframe img {
+    width: 100%;
+    height: 100%;
+  }
+
+  .post-thumbnail--iframe picture {
+    display: block;
+  }
+
+  .post-thumbnail--iframe img {
+    object-fit: cover;
+    object-position: center center;
+    border: 0;
+    border-radius: 0;
+  }
+
+  .post-thumbnail__play {
+    position: absolute;
+    inset: 0;
+    width: 100%;
+    border: 0;
+    padding: 0;
+    display: grid;
+    place-items: center;
+    background: color-mix(in oklch, #000 22%, transparent);
+    color: var(--color-fg);
+    cursor: pointer;
+  }
+
+  .post-thumbnail__play:hover,
+  .post-thumbnail__play:focus-visible {
+    background: color-mix(in oklch, #000 30%, transparent);
+  }
+
+  .post-thumbnail__play-icon {
+    width: clamp(3.25rem, 9vw, 4.75rem);
+    aspect-ratio: 1;
+    display: grid;
+    place-items: center;
+    border: 1px solid var(--color-rule-strong);
+    border-radius: var(--radius-pill);
+    background: color-mix(in oklch, var(--color-bg) 88%, transparent);
+    box-shadow: 0 0.75rem 2rem color-mix(in oklch, #000 28%, transparent);
+    transition:
+      background-color 150ms ease,
+      transform 150ms ease;
+  }
+
+  .post-thumbnail__play:hover .post-thumbnail__play-icon,
+  .post-thumbnail__play:focus-visible .post-thumbnail__play-icon {
+    background: var(--color-bg);
+    transform: scale(1.04);
+  }
+
+  .post-thumbnail__play svg {
+    width: 42%;
+    height: 42%;
+    transform: translateX(8%);
+    fill: currentColor;
+  }
+
+  .post-thumbnail__iframe {
+    position: absolute;
+    inset: 0;
+    width: 100%;
+    height: 100%;
+    border: 0;
+    background: var(--color-code-bg);
+  }
+
+  .post-thumbnail--iframe.is-active picture,
+  .post-thumbnail--iframe.is-active .post-thumbnail__play {
+    display: none;
+  }
+
+  .post-thumbnail__noscript {
+    position: absolute;
+    inset-inline: var(--space-3);
+    inset-block-end: var(--space-3);
+    padding: var(--space-2) var(--space-3);
+    border-radius: var(--radius-md);
+    background: var(--color-bg);
+    font-size: var(--fs-caption);
+  }
+
+  /* Click-to-play header video: a poster with a play button that swaps in an
+     inline <video> on click. Shared by the article banner and project cards. */
+  .video-thumbnail {
+    position: relative;
+    display: block;
+    overflow: hidden;
+  }
+
+  .video-thumbnail picture,
+  .video-thumbnail img {
+    display: block;
+    width: 100%;
+    height: 100%;
+  }
+
+  .video-thumbnail__video {
+    /* The global `video { display: block }` reset (author origin) overrides the
+       UA `[hidden]` rule, so hide the idle video explicitly to keep it from
+       swallowing the play button's click. */
+    display: none;
+    position: absolute;
+    inset: 0;
+    z-index: 2;
+    width: 100%;
+    height: 100%;
+    object-fit: contain;
+    background: #000;
+  }
+
+  .video-thumbnail.is-playing .video-thumbnail__video {
+    display: block;
+  }
+
+  .video-thumbnail__play {
+    position: absolute;
+    inset: 0;
+    z-index: 2;
+    width: 100%;
+    border: 0;
+    padding: 0;
+    display: grid;
+    place-items: center;
+    background: color-mix(in oklch, #000 22%, transparent);
+    color: var(--color-fg);
+    cursor: pointer;
+  }
+
+  .video-thumbnail__play:hover,
+  .video-thumbnail__play:focus-visible {
+    background: color-mix(in oklch, #000 30%, transparent);
+  }
+
+  .video-thumbnail__play-icon {
+    width: clamp(3.25rem, 9vw, 4.75rem);
+    aspect-ratio: 1;
+    display: grid;
+    place-items: center;
+    border: 1px solid var(--color-rule-strong);
+    border-radius: var(--radius-pill);
+    background: color-mix(in oklch, var(--color-bg) 88%, transparent);
+    box-shadow: 0 0.75rem 2rem color-mix(in oklch, #000 28%, transparent);
+    transition:
+      background-color 150ms ease,
+      transform 150ms ease;
+  }
+
+  .video-thumbnail__play:hover .video-thumbnail__play-icon,
+  .video-thumbnail__play:focus-visible .video-thumbnail__play-icon {
+    background: var(--color-bg);
+    transform: scale(1.04);
+  }
+
+  .video-thumbnail__play svg {
+    width: 42%;
+    height: 42%;
+    transform: translateX(8%);
+    fill: currentColor;
+  }
+
+  .video-thumbnail.is-playing picture,
+  .video-thumbnail.is-playing .video-thumbnail__play {
+    display: none;
+  }
+
+  .video-thumbnail__noscript {
+    position: absolute;
+    inset-inline: var(--space-3);
+    inset-block-end: var(--space-3);
+    z-index: 3;
+    margin: 0;
+    padding: var(--space-2) var(--space-3);
+    border-radius: var(--radius-md);
+    background: var(--color-bg);
+    font-size: var(--fs-caption);
+  }
+
+  /* Banner variant: keep the poster's own aspect ratio inside a rounded frame.
+     Cover with a matching ratio is not a crop, so the no-crop preview QA passes. */
+  .video-thumbnail--banner {
+    aspect-ratio: var(--video-aspect, 16 / 9);
+    border: 1px solid var(--color-rule);
+    border-radius: var(--radius-md);
+    background: var(--color-code-bg);
+  }
+
+  .video-thumbnail--banner img {
+    object-fit: cover;
+  }
+
+  .video-thumbnail--banner.post-thumbnail img {
+    border: 0;
+    border-radius: 0;
+  }
+
+  /* Card variant: only the centered badge is the play button, so a click
+     anywhere else on the thumbnail falls through to the card's Open link. */
+  .video-thumbnail--card .video-thumbnail__play {
+    inset: auto;
+    top: 50%;
+    left: 50%;
+    width: auto;
+    background: transparent;
+    transform: translate(-50%, -50%);
+  }
+
+  .video-thumbnail--card .video-thumbnail__play:hover,
+  .video-thumbnail--card .video-thumbnail__play:focus-visible {
+    background: transparent;
+  }
+
+  .video-thumbnail--card .video-thumbnail__play-icon {
+    width: clamp(2.25rem, 14vw, 3rem);
+    box-shadow: 0 0.5rem 1.25rem color-mix(in oklch, #000 32%, transparent);
+  }
+}
diff --git a/src/styles/fonts.css b/src/styles/fonts.css
new file mode 100644
index 0000000..b736945
--- /dev/null
+++ b/src/styles/fonts.css
@@ -0,0 +1,16 @@
+/* @font-face declarations: self-hosted Source Sans 3 (variable) + IBM Plex Mono. */
+@font-face {
+  font-family: 'Source Sans 3';
+  src: url('/fonts/source-sans-3-latin-variable.woff2') format('woff2-variations');
+  font-style: normal;
+  font-weight: 200 900;
+  font-display: swap;
+}
+
+@font-face {
+  font-family: 'IBM Plex Mono';
+  src: url('/fonts/ibm-plex-mono-latin-400.woff2') format('woff2');
+  font-style: normal;
+  font-weight: 400;
+  font-display: swap;
+}
diff --git a/src/styles/global.css b/src/styles/global.css
index e3b8c28..7c39044 100644
--- a/src/styles/global.css
+++ b/src/styles/global.css
@@ -1,2181 +1,24 @@
-@font-face {
-  font-family: 'Source Sans 3';
-  src: url('/fonts/source-sans-3-latin-variable.woff2') format('woff2-variations');
-  font-style: normal;
-  font-weight: 200 900;
-  font-display: swap;
-}
-
-@font-face {
-  font-family: 'IBM Plex Mono';
-  src: url('/fonts/ibm-plex-mono-latin-400.woff2') format('woff2');
-  font-style: normal;
-  font-weight: 400;
-  font-display: swap;
-}
-
-@layer reset, base, layout, components, utilities, overrides;
-
-:root {
-  color-scheme: light dark;
-
-  --font-sans:
-    'Source Sans 3', Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
-    'Segoe UI', sans-serif;
-  --font-mono: 'IBM Plex Mono', 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
-
-  /* Palette: light-dark() pairs each token (light, dark) */
-  /* Keep --color-bg in sync with THEME_BG in src/lib/site.ts, which drives the
-     browser-chrome theme-color metas (CSS cannot import those values). */
-  --color-bg: light-dark(#fbfaf7, #201f1d);
-  --color-fg: light-dark(#181817, #d8d0c3);
-  /* Contrast with --color-bg: light ~5.4:1, dark ~6.5:1 (both clear WCAG AA
-     4.5:1 for normal text). Darken-on-light / lighten-on-dark slightly from
-     the previous values that fell just below threshold. */
-  --color-muted: light-dark(#3d3b35, #aaa299);
-  --color-link: light-dark(#1e4d5e, #7fa8b7);
-  --color-link-hover: light-dark(
-    color-mix(in oklch, #1e4d5e 70%, black 30%),
-    color-mix(in oklch, #7fa8b7 80%, white 20%)
-  );
-  --color-accent: light-dark(oklch(55% 0.13 15), oklch(68% 0.11 15));
-  --color-rule: light-dark(#bcb5a3, #5a5247);
-  --color-rule-medium: light-dark(#7a7466, #70695f);
-  --color-rule-strong: light-dark(#4a4340, #aaa196);
-  --color-code-bg: light-dark(#efede6, #2a2824);
-  --color-callout-bg: light-dark(#f4f1e8, #292723);
-  --color-selection-bg: light-dark(#ecddd0, #4a3a2e);
-
-  --theme-switcher-track: var(--color-rule-medium);
-  --theme-switcher-icon-light: #f0e2b6;
-  --theme-switcher-icon-dark: #d8d0c3;
-
-  /* Typography */
-  --fs-xs: 0.75rem;
-  --fs-sm: 0.8125rem;
-  --fs-caption: 0.875rem;
-  --fs-base: 1rem;
-  --fs-body: 1.1875rem;
-  --fs-lg: 1.25rem;
-  --fs-xl: 1.75rem;
-  --fs-3xl: clamp(2rem, 1.5rem + 1.8vw, 3rem);
-  --fs-dek: clamp(1.08rem, 0.95rem + 0.6vw, 1.25rem);
-
-  --leading-tight: 1.18;
-  --leading-snug: 1.35;
-  --leading-prose: 1.6;
-
-  --weight-regular: 400;
-  --weight-medium: 500;
-  --weight-semibold: 650;
-  --weight-bold: 700;
-
-  /* Spacing */
-  --space-1: 0.25rem;
-  --space-2: 0.5rem;
-  --space-3: 0.75rem;
-  --space-4: 1rem;
-  --space-5: 1.25rem;
-  --space-6: 1.5rem;
-  --space-8: 2rem;
-  --space-10: 2.5rem;
-  --space-12: 3rem;
-  --space-16: 4rem;
-
-  /* Radius */
-  --radius-sm: 4px;
-  --radius-md: 6px;
-  --radius-lg: 8px;
-  --radius-pill: 999px;
-
-  /* Layout */
-  --measure: 36rem;
-  --measure-wide: 56rem;
-  --page: 72rem;
-  --gutter: clamp(20px, 4vw, 32px);
-}
-
-:root[data-theme='light'] {
-  color-scheme: light;
-}
-
-:root[data-theme='dark'] {
-  color-scheme: dark;
-}
-
-@media (max-width: 700px) {
-  :root {
-    --fs-body: 1.0625rem;
-    --fs-dek: 1rem;
-    --fs-lg: 1.125rem;
-    --fs-xl: 1.375rem;
-    --fs-3xl: 1.75rem;
-  }
-}
-
-@layer reset {
-  *,
-  *::before,
-  *::after {
-    box-sizing: border-box;
-  }
-
-  body,
-  h1,
-  h2,
-  h3,
-  h4,
-  h5,
-  h6,
-  p,
-  figure,
-  blockquote,
-  dl,
-  dd {
-    margin: 0;
-  }
-
-  ul[role='list'],
-  ol[role='list'] {
-    list-style: none;
-    padding: 0;
-  }
-
-  button,
-  input,
-  textarea,
-  select {
-    font: inherit;
-  }
-
-  img,
-  video,
-  canvas,
-  svg {
-    display: block;
-    max-width: 100%;
-    height: auto;
-  }
-}
-
-@layer base {
-  html {
-    background: var(--color-bg);
-    scroll-behavior: smooth;
-  }
-
-  body {
-    min-block-size: 100vh;
-    min-block-size: 100dvh;
-    display: flex;
-    flex-direction: column;
-    background: var(--color-bg);
-    color: var(--color-fg);
-    font-family: var(--font-sans);
-    font-size: var(--fs-body);
-    line-height: var(--leading-snug);
-    transition:
-      background-color 200ms ease,
-      color 200ms ease;
-  }
-
-  address {
-    font-style: normal;
-  }
-
-  a {
-    color: var(--color-link);
-    text-decoration-thickness: 0.08em;
-    text-underline-offset: 0.18em;
-    transition: color 150ms ease;
-  }
-
-  a:hover {
-    color: var(--color-link-hover);
-  }
-
-  a:active {
-    opacity: 0.85;
-    transition: opacity 80ms ease;
-  }
-
-  :focus-visible {
-    outline: 2px solid var(--color-accent);
-    outline-offset: 3px;
-  }
-
-  main:focus-visible {
-    outline: 2px solid var(--color-accent);
-    outline-offset: -2px;
-  }
-
-  ::selection {
-    background: var(--color-selection-bg);
-    color: var(--color-fg);
-  }
-}
-
-@layer utilities {
-  .sr-only {
-    position: absolute;
-    width: 1px;
-    height: 1px;
-    padding: 0;
-    margin: -1px;
-    overflow: hidden;
-    clip-path: inset(50%);
-    white-space: nowrap;
-    border: 0;
-  }
-}
-
-@layer layout {
-  :where(.site-header, .site-footer, .home-intro, .home-section, .page-shell, .post) {
-    width: min(100% - 2 * var(--gutter), var(--page));
-    margin-inline: auto;
-  }
-
-  .post {
-    width: min(100% - 2 * var(--gutter), var(--measure-wide));
-  }
-
-  .skip-link {
-    position: absolute;
-    left: calc(var(--gutter) + env(safe-area-inset-left));
-    top: calc(var(--space-3) + env(safe-area-inset-top));
-    z-index: 10;
-    transform: translateY(-150%);
-    background: var(--color-fg);
-    color: var(--color-bg);
-    padding: var(--space-3) var(--space-4);
-    min-block-size: 44px;
-    display: inline-flex;
-    align-items: center;
-    text-decoration: none;
-    transition: transform 150ms ease;
-  }
-
-  .skip-link:focus {
-    transform: translateY(0);
-    outline: 2px solid var(--color-accent);
-    outline-offset: 2px;
-  }
-
-  .site-header {
-    display: flex;
-    align-items: center;
-    justify-content: space-between;
-    gap: var(--space-4);
-    flex-wrap: wrap;
-    padding-block: var(--space-8) var(--space-6);
-    border-bottom: 1px solid var(--color-rule);
-  }
-
-  main {
-    flex: 1 0 auto;
-  }
-
-  .site-title {
-    color: var(--color-fg);
-    font-size: var(--fs-lg);
-    font-weight: var(--weight-bold);
-    letter-spacing: -0.005em;
-    text-decoration: none;
-  }
-
-  .header-actions {
-    display: flex;
-    align-items: center;
-    flex-wrap: wrap;
-    gap: var(--space-2) var(--space-6);
-    min-width: 0;
-  }
-
-  .site-nav {
-    display: flex;
-    flex-wrap: wrap;
-    gap: var(--space-1) var(--space-5);
-  }
-
-  .site-nav a,
-  .site-footer a {
-    min-height: 44px;
-    display: inline-flex;
-    align-items: center;
-    color: var(--color-muted);
-    text-decoration: none;
-  }
-
-  .site-nav a:hover,
-  .site-footer a:hover {
-    color: var(--color-fg);
-    text-decoration: underline;
-    text-underline-offset: 0.25em;
-  }
-
-  .site-nav a[aria-current='page'],
-  .site-nav a[aria-current='true'] {
-    color: var(--color-fg);
-  }
-
-  .site-footer {
-    border-top: 1px solid var(--color-rule);
-    margin-top: var(--space-16);
-    padding-block: var(--space-8) var(--space-10);
-  }
-
-  .footer-meta {
-    display: flex;
-    align-items: center;
-    flex-wrap: nowrap;
-    gap: var(--space-2) var(--space-5);
-    margin: 0;
-    padding: 0;
-    list-style: none;
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-    white-space: nowrap;
-  }
-
-  .footer-meta a,
-  .footer-meta > span {
-    min-height: 44px;
-    display: inline-flex;
-    align-items: center;
-  }
-
-  .footer-meta a {
-    padding-inline: var(--space-1);
-    margin-inline: calc(-1 * var(--space-1));
-  }
-
-  .footer-copyright {
-    gap: 0.25em;
-  }
-
-  .footer-contact {
-    display: flex;
-    align-items: center;
-    flex-wrap: nowrap;
-    gap: var(--space-2) var(--space-5);
-    min-width: 0;
-  }
-
-  /* Page header (shared by .home-intro, .page-header, .post-header) */
-  .home-intro {
-    padding-block: clamp(2rem, 5vw, 4rem) var(--space-6);
-  }
-
-  .home-intro h1,
-  .page-header h1,
-  .post-header h1 {
-    max-width: var(--measure-wide);
-    color: var(--color-fg);
-    font-size: var(--fs-3xl);
-    font-weight: var(--weight-semibold);
-    line-height: var(--leading-tight);
-    text-wrap: balance;
-  }
-
-  .home-intro-name {
-    color: var(--color-accent);
-  }
-
-  .home-intro p:not(.eyebrow),
-  .page-header p,
-  .dek {
-    max-width: var(--measure);
-    color: var(--color-muted);
-    font-size: var(--fs-dek);
-  }
-
-  .post-header {
-    max-width: var(--measure-wide);
-    padding-block: var(--space-10) var(--space-6);
-  }
-
-  .page-header {
-    max-width: var(--measure-wide);
-    padding-block: var(--space-2) var(--space-6);
-  }
-
-  .page-shell--full-width .page-header,
-  .page-shell--full-width .page-header p,
-  .page-shell--full-width .about-copy,
-  .page-shell--full-width > .about-copy > p {
-    width: 100%;
-    max-width: none;
-    max-inline-size: none;
-  }
-
-  .post-header .dek {
-    margin-block: var(--space-4) 0;
-  }
-
-  .post-meta {
-    margin-block: var(--space-3) 0;
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-    line-height: 1.4;
-  }
-
-  .home-section,
-  .page-shell {
-    margin-top: var(--space-8);
-  }
-}
-
-@layer components {
-  .eyebrow {
-    margin: 0 0 var(--space-3);
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-    line-height: 1.4;
-    font-weight: var(--weight-semibold);
-    letter-spacing: 0.08em;
-    text-transform: uppercase;
-  }
-
-  .section-heading {
-    width: 100%;
-    display: flex;
-    align-items: baseline;
-    justify-content: space-between;
-    gap: var(--space-4);
-    flex-wrap: wrap;
-    margin-bottom: var(--space-4);
-    padding-top: var(--space-6);
-  }
-
-  :where(.section-heading, .archive-year, .project-section, .facts, .at-a-glance) h2 {
-    font-size: var(--fs-lg);
-    font-weight: var(--weight-semibold);
-    line-height: var(--leading-snug);
-  }
-
-  .section-heading a {
-    min-height: 44px;
-    display: inline-flex;
-    align-items: center;
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-    text-decoration: none;
-  }
-
-  .section-heading a:hover {
-    color: var(--color-fg);
-    text-decoration: underline;
-    text-underline-offset: 0.25em;
-  }
-
-  .section-heading__text {
-    flex: 1 1 11rem;
-    min-width: 0;
-  }
-
-  .section-heading__text p {
-    max-width: var(--measure);
-    margin-top: var(--space-1);
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-    line-height: 1.4;
-  }
-
-  .breadcrumbs {
-    margin: 0 0 var(--space-3);
-    padding: 0;
-    list-style: none;
-    display: flex;
-    flex-wrap: wrap;
-    gap: var(--space-2);
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-  }
-
-  .breadcrumbs li {
-    display: inline-flex;
-    align-items: baseline;
-    min-width: 0;
-  }
-
-  .breadcrumbs li:not(:last-child)::after {
-    content: '›';
-    margin-left: var(--space-2);
-    color: var(--color-rule-medium);
-    flex: none;
-  }
-
-  .breadcrumbs a {
-    color: var(--color-muted);
-    text-decoration: none;
-  }
-
-  .breadcrumbs a:hover {
-    color: var(--color-fg);
-    text-decoration: underline;
-    text-underline-offset: 0.25em;
-  }
-
-  .breadcrumbs [aria-current='page'] {
-    color: var(--color-fg);
-  }
-
-  .tag-cloud {
-    margin-top: var(--space-2);
-  }
-
-  .tag-list {
-    display: flex;
-    flex-wrap: wrap;
-    gap: var(--space-1) var(--space-2);
-    margin: var(--space-2) 0 0;
-    padding: 0;
-    list-style: none;
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-  }
-
-  .tag-list a {
-    min-height: 2rem;
-    display: inline-flex;
-    align-items: center;
-    padding-inline: var(--space-1);
-    margin-inline: calc(-1 * var(--space-1));
-    color: var(--color-muted);
-    text-decoration: none;
-  }
-
-  .tag-list a::before {
-    content: '#';
-    color: var(--color-rule-medium);
-  }
-
-  .tag-list .tag-more::before {
-    content: none;
-  }
-
-  .tag-list .tag-count {
-    margin-inline-start: 0.35em;
-    padding: 0 0.4em;
-    border-radius: var(--radius-pill);
-    background: var(--color-code-bg);
-    color: var(--color-fg);
-    font-size: var(--fs-caption);
-    font-variant-numeric: tabular-nums;
-  }
-
-  .tag-list a:hover,
-  .tag-list a[aria-current='page'] {
-    color: var(--color-fg);
-  }
-
-  .tag-filter {
-    display: flex;
-    align-items: baseline;
-    flex-wrap: wrap;
-    gap: var(--space-2) var(--space-4);
-    margin: 0 0 var(--space-8);
-    padding-block: var(--space-3);
-    border-block: 1px solid var(--color-rule);
-  }
-
-  .tag-filter > span {
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-  }
-
-  .article-list,
-  .project-list {
-    list-style: none;
-    margin: 0;
-    padding: 0;
-    width: 100%;
-  }
-
-  .project-list {
-    display: grid;
-    grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
-    gap: var(--space-4);
-    align-items: stretch;
-  }
-
-  .article-list > li {
-    display: grid;
-    grid-template-columns: 4.5rem minmax(0, 1fr) minmax(6rem, 8rem);
-    grid-template-areas: 'date content thumb';
-    align-items: center;
-    gap: var(--space-4);
-    padding-block: var(--space-6);
-    border-top: 1px solid var(--color-rule);
-  }
-
-  .article-list > li:first-child {
-    border-top: 0;
-  }
-
-  .article-list time {
-    grid-area: date;
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-    text-align: end;
-  }
-
-  .article-list > li > article {
-    grid-area: content;
-    min-width: 0;
-    padding-right: var(--space-3);
-  }
-
-  .article-list h3,
-  .project-list h3 {
-    font-size: var(--fs-base);
-    line-height: var(--leading-snug);
-  }
-
-  .project-list h3 {
-    color: var(--color-fg);
-    font-weight: var(--weight-semibold);
-  }
-
-  .article-list .entry-title {
-    display: inline-flex;
-    align-items: center;
-    min-height: 28px;
-    color: var(--color-fg);
-    font-weight: var(--weight-semibold);
-    text-decoration: none;
-  }
-
-  .article-list .entry-title:hover {
-    color: var(--color-link-hover);
-  }
-
-  .article-list p,
-  .project-list p {
-    margin: var(--space-1) 0 0;
-    color: var(--color-muted);
-    font-size: var(--fs-base);
-    line-height: var(--leading-snug);
-  }
-
-  .entry-thumbnail {
-    display: block;
-    overflow: hidden;
-    border: 1px solid var(--color-rule);
-    border-radius: var(--radius-md);
-    background: var(--color-code-bg);
-    aspect-ratio: 4 / 3;
-    transition: border-color 150ms ease;
-  }
-
-  .entry-thumbnail img {
-    display: block;
-    width: 100%;
-    height: 100%;
-    object-fit: cover;
-    object-position: center center;
-  }
-
-  a.entry-thumbnail {
-    text-decoration: none;
-  }
-
-  a.entry-thumbnail:hover,
-  a.entry-thumbnail:focus-visible {
-    border-color: var(--color-rule-strong);
-  }
-
-  .article-list > li:focus-within .entry-thumbnail {
-    border-color: var(--color-rule-strong);
-  }
-
-  .article-thumbnail {
-    grid-area: thumb;
-    align-self: center;
-  }
-
-  .article-list--timeline {
-    --timeline-date-column: 6.25rem;
-    --timeline-marker-column: 1.125rem;
-    --timeline-marker-offset: 0.5625rem;
-    --timeline-gap: var(--space-4);
-    --timeline-date-offset: 1.125rem;
-    --timeline-dot-top: 50%;
-    --timeline-marker-center: calc(
-      var(--timeline-date-column) + var(--timeline-gap) + var(--timeline-marker-offset)
-    );
-  }
-
-  .article-list--timeline > li {
-    position: relative;
-    grid-template-columns:
-      var(--timeline-date-column) var(--timeline-marker-column) minmax(0, 1fr)
-      minmax(6rem, 8rem);
-    grid-template-areas: 'date marker content thumb';
-    column-gap: var(--timeline-gap);
-    border-top: 0;
-  }
-
-  .article-list--timeline > li::before,
-  .article-list--timeline > li::after {
-    content: '';
-    position: absolute;
-    left: var(--timeline-marker-center);
-    z-index: 0;
-    pointer-events: none;
-  }
-
-  .article-list--timeline > li::before {
-    inset-block: 0;
-    width: 1px;
-    transform: translateX(-50%);
-    background: var(--color-rule-medium);
-  }
-
-  .article-list--timeline > li:first-child::before {
-    inset-block-start: var(--timeline-dot-top);
-  }
-
-  .article-list--timeline > li:last-child::before {
-    inset-block-end: calc(100% - var(--timeline-dot-top));
-  }
-
-  .article-list--timeline > li:only-child::before {
-    content: none;
-  }
-
-  .article-list--timeline > li::after {
-    top: var(--timeline-dot-top);
-    width: 0.75rem;
-    height: 0.75rem;
-    border: 2px solid var(--color-bg);
-    border-radius: var(--radius-pill);
-    background: var(--color-accent);
-    box-shadow: 0 0 0 1px var(--color-rule-strong);
-    transform: translate(-50%, -50%);
-  }
-
-  .article-list--timeline > li > article,
-  .article-list--timeline time,
-  .article-list--timeline .entry-thumbnail {
-    position: relative;
-    z-index: 1;
-  }
-
-  .article-list--timeline time {
-    justify-self: end;
-    align-self: center;
-    width: max-content;
-    min-block-size: 0;
-    margin-inline-end: calc(-1 * var(--timeline-date-offset));
-    padding-inline-end: 4px;
-    display: inline-block;
-    color: var(--color-muted);
-    font-size: var(--fs-sm);
-    line-height: 1.2;
-    text-align: center;
-    white-space: nowrap;
-    top: 5px;
-    transform: rotate(-45deg);
-    transform-origin: right center;
-  }
-
-  .project-card {
-    position: relative;
-    display: grid;
-    grid-template-columns: 1fr;
-    grid-template-areas:
-      'thumb'
-      'summary';
-    min-width: 0;
-    overflow: hidden;
-    border: 1px solid var(--color-rule);
-    border-radius: var(--radius-lg);
-    background: var(--color-bg);
-    transition: border-color 150ms ease;
-  }
-
-  .project-card:hover,
-  .project-card:focus-within,
-  .project-card:target {
-    border-color: var(--color-rule-strong);
-  }
-
-  .project-card .project-thumbnail {
-    grid-area: thumb;
-    width: 100%;
-    height: auto;
-    border: 0;
-    border-bottom: 1px solid var(--color-rule);
-    border-radius: 0;
-    aspect-ratio: 4 / 3;
-  }
-
-  .project-card__summary {
-    grid-area: summary;
-    display: flex;
-    flex-direction: column;
-    justify-content: space-between;
-    gap: var(--space-3);
-    min-width: 0;
-    padding: var(--space-3) var(--space-4);
-  }
-
-  .project-card p {
-    margin: 0;
-  }
-
-  .project-card .project-description {
-    color: var(--color-fg);
-    font-size: var(--fs-base);
-    line-height: var(--leading-snug);
-  }
-
-  .project-card__head {
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-1);
-    min-width: 0;
-  }
-
-  .project-card__actions {
-    display: flex;
-    align-items: center;
-    flex-wrap: wrap;
-    gap: var(--space-2) var(--space-3);
-    margin-top: var(--space-3);
-  }
-
-  /* Stretched link: the Open control's overlay covers the whole card so any
-     click opens the project website. The Article link sits above the overlay
-     via a higher z-index and stays independently clickable. */
-  .project-card__open::after {
-    content: '';
-    position: absolute;
-    inset: 0;
-    z-index: 1;
-    /* Cover the whole card, not the Open button's pill radius. The card's own
-       overflow:hidden + border-radius clips this to the rounded card shape. */
-    border-radius: 0;
-  }
-
-  .project-card__open {
-    margin-left: auto;
-    display: inline-flex;
-    align-items: center;
-    gap: 0.3em;
-    min-height: 36px;
-    padding: 0.25em 0.85em;
-    border: 1px solid var(--color-rule-strong);
-    border-radius: var(--radius-pill);
-    background: var(--color-bg);
-    color: var(--color-link);
-    font-size: var(--fs-caption);
-    font-weight: var(--weight-semibold);
-    text-decoration: none;
-    transition:
-      background-color 150ms ease,
-      border-color 150ms ease,
-      color 150ms ease;
-  }
-
-  .project-card:hover .project-card__open,
-  .project-card:focus-within .project-card__open {
-    border-color: var(--color-link);
-    background: var(--color-callout-bg);
-    color: var(--color-link-hover);
-  }
-
-  .project-article-link {
-    position: relative;
-    z-index: 2;
-    display: inline-flex;
-    align-items: center;
-    gap: 0.3em;
-    min-height: 36px;
-    color: var(--color-link);
-    font-size: var(--fs-caption);
-    font-weight: var(--weight-medium);
-    text-decoration: none;
-  }
-
-  .project-article-link:hover,
-  .project-article-link:focus-visible {
-    color: var(--color-link-hover);
-    text-decoration: underline;
-  }
-
-  .project-links {
-    display: flex;
-    flex-wrap: wrap;
-    gap: var(--space-1) var(--space-3);
-    margin: var(--space-3) 0 0;
-    padding: 0;
-    list-style: none;
-  }
-
-  .project-links a {
-    min-height: 44px;
-    min-width: 44px;
-    display: inline-flex;
-    align-items: center;
-    color: var(--color-link);
-  }
-
-  .project-links a:hover,
-  .project-links a:focus-visible {
-    color: var(--color-link-hover);
-  }
-
-  .project-links a .download-indicator {
-    margin-left: 0.25em;
-    color: var(--color-muted);
-    font-size: 0.85em;
-  }
-
-  .post > .post-media,
-  .facts {
-    max-width: var(--measure);
-    margin-inline: auto;
-  }
-
-  .post > .prose {
-    max-width: var(--measure-wide);
-    max-inline-size: var(--measure-wide);
-    margin-inline: auto;
-  }
-
-  .post > .at-a-glance,
-  .post > .post-thumbnail,
-  .post > .post-gallery,
-  .post-nav {
-    max-width: var(--measure-wide);
-    margin-inline: auto;
-  }
-
-  .archive-year,
-  .project-section {
-    width: 100%;
-  }
-
-  .archive-year + .archive-year,
-  .project-section + .project-section {
-    margin-top: var(--space-10);
-  }
-
-  .archive-year h2,
-  .project-section h2 {
-    margin-bottom: var(--space-3);
-  }
-
-  .about-section {
-    width: 100%;
-    margin-top: var(--space-10);
-  }
-
-  .about-section--starting-points {
-    margin-top: var(--space-6);
-    padding-top: var(--space-6);
-    border-top: 1px solid var(--color-rule);
-  }
-
-  .about-section--starting-points .section-heading {
-    align-items: flex-start;
-    padding-top: 0;
-  }
-
-  .about-section.facts {
-    max-width: none;
-  }
-
-  .about-section.facts > .prose {
-    margin-top: var(--space-4);
-  }
-
-  .prose.about-copy {
-    width: 100%;
-    max-inline-size: none;
-  }
-
-  .starting-points {
-    display: grid;
-    grid-template-columns: repeat(5, minmax(0, 1fr));
-    gap: var(--space-3);
-    margin: 0;
-    padding: var(--space-4) 0 0;
-    list-style: none;
-  }
-
-  .starting-points > li {
-    min-width: 0;
-  }
-
-  .starting-point__thumbnail {
-    aspect-ratio: 4 / 3;
-  }
-
-  .starting-point__body {
-    min-width: 0;
-    padding-block-start: var(--space-2);
-  }
-
-  .starting-point__body h3 {
-    font-size: var(--fs-sm);
-    font-weight: var(--weight-semibold);
-    line-height: var(--leading-snug);
-  }
-
-  .starting-point__body a {
-    color: var(--color-fg);
-    text-decoration: none;
-  }
-
-  .starting-point__body a:hover {
-    color: var(--color-link-hover);
-    text-decoration: underline;
-    text-underline-offset: 0.2em;
-  }
-
-  .starting-point__body p {
-    margin-top: var(--space-1);
-    color: var(--color-muted);
-    font-size: var(--fs-xs);
-    line-height: var(--leading-snug);
-  }
-
-  .starting-points > li:focus-within .entry-thumbnail {
-    border-color: var(--color-rule-strong);
-  }
-
-  .about-links {
-    display: flex;
-    flex-wrap: wrap;
-    gap: var(--space-1) var(--space-4);
-  }
-
-  .post > .prose {
-    margin-top: var(--space-8);
-  }
-
-  .post-thumbnail {
-    margin: 0;
-  }
-
-  .post-thumbnail img {
-    width: 100%;
-    border: 1px solid var(--color-rule);
-    border-radius: var(--radius-md);
-    background: var(--color-code-bg);
-  }
-
-  .post-thumbnail--iframe {
-    position: relative;
-    aspect-ratio: var(--post-thumbnail-aspect, 16 / 9);
-    overflow: hidden;
-    border: 1px solid var(--color-rule);
-    border-radius: var(--radius-md);
-    background: var(--color-code-bg);
-  }
-
-  .post-thumbnail--iframe picture,
-  .post-thumbnail--iframe img {
-    width: 100%;
-    height: 100%;
-  }
-
-  .post-thumbnail--iframe picture {
-    display: block;
-  }
-
-  .post-thumbnail--iframe img {
-    object-fit: cover;
-    object-position: center center;
-    border: 0;
-    border-radius: 0;
-  }
-
-  .post-thumbnail__play {
-    position: absolute;
-    inset: 0;
-    width: 100%;
-    border: 0;
-    padding: 0;
-    display: grid;
-    place-items: center;
-    background: color-mix(in oklch, #000 22%, transparent);
-    color: var(--color-fg);
-    cursor: pointer;
-  }
-
-  .post-thumbnail__play:hover,
-  .post-thumbnail__play:focus-visible {
-    background: color-mix(in oklch, #000 30%, transparent);
-  }
-
-  .post-thumbnail__play-icon {
-    width: clamp(3.25rem, 9vw, 4.75rem);
-    aspect-ratio: 1;
-    display: grid;
-    place-items: center;
-    border: 1px solid var(--color-rule-strong);
-    border-radius: var(--radius-pill);
-    background: color-mix(in oklch, var(--color-bg) 88%, transparent);
-    box-shadow: 0 0.75rem 2rem color-mix(in oklch, #000 28%, transparent);
-    transition:
-      background-color 150ms ease,
-      transform 150ms ease;
-  }
-
-  .post-thumbnail__play:hover .post-thumbnail__play-icon,
-  .post-thumbnail__play:focus-visible .post-thumbnail__play-icon {
-    background: var(--color-bg);
-    transform: scale(1.04);
-  }
-
-  .post-thumbnail__play svg {
-    width: 42%;
-    height: 42%;
-    transform: translateX(8%);
-    fill: currentColor;
-  }
-
-  .post-thumbnail__iframe {
-    position: absolute;
-    inset: 0;
-    width: 100%;
-    height: 100%;
-    border: 0;
-    background: var(--color-code-bg);
-  }
-
-  .post-thumbnail--iframe.is-active picture,
-  .post-thumbnail--iframe.is-active .post-thumbnail__play {
-    display: none;
-  }
-
-  .post-thumbnail__noscript {
-    position: absolute;
-    inset-inline: var(--space-3);
-    inset-block-end: var(--space-3);
-    padding: var(--space-2) var(--space-3);
-    border-radius: var(--radius-md);
-    background: var(--color-bg);
-    font-size: var(--fs-caption);
-  }
-
-  /* Click-to-play header video: a poster with a play button that swaps in an
-     inline <video> on click. Shared by the article banner and project cards. */
-  .video-thumbnail {
-    position: relative;
-    display: block;
-    overflow: hidden;
-  }
-
-  .video-thumbnail picture,
-  .video-thumbnail img {
-    display: block;
-    width: 100%;
-    height: 100%;
-  }
-
-  .video-thumbnail__video {
-    /* The global `video { display: block }` reset (author origin) overrides the
-       UA `[hidden]` rule, so hide the idle video explicitly to keep it from
-       swallowing the play button's click. */
-    display: none;
-    position: absolute;
-    inset: 0;
-    z-index: 2;
-    width: 100%;
-    height: 100%;
-    object-fit: contain;
-    background: #000;
-  }
-
-  .video-thumbnail.is-playing .video-thumbnail__video {
-    display: block;
-  }
-
-  .video-thumbnail__play {
-    position: absolute;
-    inset: 0;
-    z-index: 2;
-    width: 100%;
-    border: 0;
-    padding: 0;
-    display: grid;
-    place-items: center;
-    background: color-mix(in oklch, #000 22%, transparent);
-    color: var(--color-fg);
-    cursor: pointer;
-  }
-
-  .video-thumbnail__play:hover,
-  .video-thumbnail__play:focus-visible {
-    background: color-mix(in oklch, #000 30%, transparent);
-  }
-
-  .video-thumbnail__play-icon {
-    width: clamp(3.25rem, 9vw, 4.75rem);
-    aspect-ratio: 1;
-    display: grid;
-    place-items: center;
-    border: 1px solid var(--color-rule-strong);
-    border-radius: var(--radius-pill);
-    background: color-mix(in oklch, var(--color-bg) 88%, transparent);
-    box-shadow: 0 0.75rem 2rem color-mix(in oklch, #000 28%, transparent);
-    transition:
-      background-color 150ms ease,
-      transform 150ms ease;
-  }
-
-  .video-thumbnail__play:hover .video-thumbnail__play-icon,
-  .video-thumbnail__play:focus-visible .video-thumbnail__play-icon {
-    background: var(--color-bg);
-    transform: scale(1.04);
-  }
-
-  .video-thumbnail__play svg {
-    width: 42%;
-    height: 42%;
-    transform: translateX(8%);
-    fill: currentColor;
-  }
-
-  .video-thumbnail.is-playing picture,
-  .video-thumbnail.is-playing .video-thumbnail__play {
-    display: none;
-  }
-
-  .video-thumbnail__noscript {
-    position: absolute;
-    inset-inline: var(--space-3);
-    inset-block-end: var(--space-3);
-    z-index: 3;
-    margin: 0;
-    padding: var(--space-2) var(--space-3);
-    border-radius: var(--radius-md);
-    background: var(--color-bg);
-    font-size: var(--fs-caption);
-  }
-
-  /* Banner variant: keep the poster's own aspect ratio inside a rounded frame.
-     Cover with a matching ratio is not a crop, so the no-crop preview QA passes. */
-  .video-thumbnail--banner {
-    aspect-ratio: var(--video-aspect, 16 / 9);
-    border: 1px solid var(--color-rule);
-    border-radius: var(--radius-md);
-    background: var(--color-code-bg);
-  }
-
-  .video-thumbnail--banner img {
-    object-fit: cover;
-  }
-
-  .video-thumbnail--banner.post-thumbnail img {
-    border: 0;
-    border-radius: 0;
-  }
-
-  /* Card variant: only the centered badge is the play button, so a click
-     anywhere else on the thumbnail falls through to the card's Open link. */
-  .video-thumbnail--card .video-thumbnail__play {
-    inset: auto;
-    top: 50%;
-    left: 50%;
-    width: auto;
-    background: transparent;
-    transform: translate(-50%, -50%);
-  }
-
-  .video-thumbnail--card .video-thumbnail__play:hover,
-  .video-thumbnail--card .video-thumbnail__play:focus-visible {
-    background: transparent;
-  }
-
-  .video-thumbnail--card .video-thumbnail__play-icon {
-    width: clamp(2.25rem, 14vw, 3rem);
-    box-shadow: 0 0.5rem 1.25rem color-mix(in oklch, #000 32%, transparent);
-  }
-
-  .prose {
-    max-inline-size: var(--measure);
-    line-height: var(--leading-prose);
-    hyphens: auto;
-    hyphenate-limit-chars: 7 3 3;
-  }
-
-  .prose > * + * {
-    margin-top: 1.05em;
-  }
-
-  .prose > h2:first-child,
-  .prose > h3:first-child {
-    margin-top: 0;
-  }
-
-  .prose p {
-    text-wrap: pretty;
-  }
-
-  .prose h2,
-  .prose h3 {
-    position: relative;
-    color: var(--color-fg);
-    line-height: var(--leading-tight);
-    scroll-margin-top: var(--space-8);
-  }
-
-  .prose h2 {
-    margin-top: var(--space-12);
-    font-size: var(--fs-xl);
-    font-weight: var(--weight-semibold);
-  }
-
-  .prose h3 {
-    margin-top: var(--space-8);
-    font-size: var(--fs-lg);
-    font-weight: var(--weight-semibold);
-  }
-
-  .prose h2:target,
-  .prose h3:target {
-    background: var(--color-callout-bg);
-    border-inline-start: 2px solid var(--color-accent);
-    padding-inline-start: var(--space-3);
-    margin-inline-start: calc(-1 * var(--space-3) - 2px);
-  }
-
-  .prose .heading-anchor {
-    margin-inline-start: 0.4em;
-    color: var(--color-muted);
-    font-weight: var(--weight-regular);
-    font-size: 0.85em;
-    text-decoration: none;
-    opacity: 0;
-    transition: opacity 150ms ease;
-  }
-
-  .prose .heading-anchor:focus-visible {
-    opacity: 1;
-    text-decoration: underline;
-  }
-
-  .prose .heading-anchor::before {
-    content: '#';
-  }
-
-  .prose h2:hover .heading-anchor,
-  .prose h3:hover .heading-anchor,
-  .prose .heading-anchor:hover,
-  .prose .heading-anchor:focus-visible {
-    opacity: 1;
-  }
-
-  @media (hover: none) {
-    .prose .heading-anchor {
-      opacity: 1;
-    }
-  }
-
-  .prose ul,
-  .prose ol {
-    padding-inline-start: 1.25rem;
-  }
-
-  .prose li + li {
-    margin-top: var(--space-1);
-  }
-
-  .prose strong {
-    font-weight: var(--weight-bold);
-    color: var(--color-fg);
-  }
-
-  .prose em {
-    font-style: italic;
-  }
-
-  .prose blockquote {
-    margin-inline: 0;
-    padding: var(--space-2) var(--space-4);
-    border-inline-start: 3px solid var(--color-rule-medium);
-    background: var(--color-callout-bg);
-    color: var(--color-muted);
-    font-style: italic;
-  }
-
-  .prose blockquote > * + * {
-    margin-top: 0.6em;
-  }
-
-  .prose hr {
-    margin-block: var(--space-8);
-    border: 0;
-    height: 1px;
-    background: var(--color-rule);
-  }
-
-  .prose table {
-    width: 100%;
-    max-width: 100%;
-    border-collapse: collapse;
-    font-size: 0.95em;
-    display: block;
-    overflow-x: auto;
-  }
-
-  .prose thead {
-    background: var(--color-code-bg);
-    text-align: start;
-  }
-
-  .prose th,
-  .prose td {
-    padding: var(--space-2) var(--space-3);
-    border-bottom: 1px solid var(--color-rule);
-    vertical-align: top;
-  }
-
-  .prose th {
-    font-weight: var(--weight-semibold);
-  }
-
-  .prose code {
-    font-family: var(--font-mono);
-    font-size: 0.88em;
-    background: var(--color-code-bg);
-    border-radius: var(--radius-sm);
-    padding: 0.08em 0.25em;
-  }
-
-  .prose pre {
-    max-width: 100%;
-    overflow-x: auto;
-    scrollbar-gutter: stable;
-    padding: var(--space-4);
-    background: var(--color-code-bg);
-    border: 1px solid var(--color-rule);
-    border-radius: var(--radius-md);
-    line-height: 1.55;
-    scrollbar-width: thin;
-    scrollbar-color: var(--color-rule-medium) var(--color-code-bg);
-  }
-
-  .prose pre::-webkit-scrollbar {
-    height: 8px;
-  }
-
-  .prose pre::-webkit-scrollbar-track {
-    background: var(--color-code-bg);
-  }
-
-  .prose pre::-webkit-scrollbar-thumb {
-    background: var(--color-rule-medium);
-    border-radius: var(--radius-sm);
-  }
-
-  .prose pre code {
-    background: transparent;
-    padding: 0;
-  }
-
-  /* Shiki dual-theme: defaultColor: false emits --shiki-light / --shiki-dark
-     vars on every token; light-dark() picks the active variant from
-     color-scheme on :root. */
-  .prose pre.astro-code,
-  .prose pre.astro-code code,
-  .prose pre.astro-code span {
-    color: light-dark(var(--shiki-light), var(--shiki-dark));
-    background-color: light-dark(
-      var(--shiki-light-bg, var(--color-code-bg)),
-      var(--shiki-dark-bg, var(--color-code-bg))
-    );
-  }
-
-  .at-a-glance {
-    margin-top: var(--space-8);
-    padding-block: var(--space-5);
-    border-block: 1px solid var(--color-rule);
-  }
-
-  .at-a-glance dl,
-  .facts dl {
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-2);
-    margin: var(--space-4) 0 0;
-  }
-
-  .at-a-glance__row,
-  .facts dl > div {
-    display: grid;
-    grid-template-columns: minmax(6rem, max-content) minmax(0, 1fr);
-    gap: var(--space-4);
-  }
-
-  .at-a-glance dt,
-  .facts dt {
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-  }
-
-  .facts {
-    margin-top: var(--space-8);
-    padding-top: var(--space-6);
-    border-top: 1px solid var(--color-rule);
-  }
-
-  /* Let prose wrap beside .at-a-glance and continue below it. */
-  @media (min-width: 1100px) {
-    .post > .at-a-glance {
-      float: right;
-      width: min(18rem, 42%);
-      margin-top: var(--space-8);
-      margin-right: 0;
-      margin-bottom: var(--space-4);
-      margin-left: var(--space-8);
-    }
-
-    .post > .post-media,
-    .post > .post-gallery,
-    .related-posts,
-    .post-nav {
-      clear: both;
-    }
-  }
-
-  .post-media {
-    max-inline-size: min(100%, var(--measure-wide));
-    margin: var(--space-8) 0 0;
-  }
-
-  .post-media img,
-  .post-media video {
-    border: 1px solid var(--color-rule);
-    border-radius: var(--radius-md);
-    background: var(--color-code-bg);
-    width: 100%;
-  }
-
-  .post-media figcaption,
-  .media-transcript {
-    max-width: var(--measure);
-    margin-top: var(--space-2);
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-    line-height: 1.45;
-  }
-
-  .media-transcript strong {
-    color: var(--color-fg);
-    font-weight: var(--weight-semibold);
-  }
-
-  .post-nav {
-    margin-top: var(--space-12);
-    padding-top: var(--space-6);
-    border-top: 1px solid var(--color-rule);
-  }
-
-  .post-nav__list {
-    display: grid;
-    grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
-    gap: var(--space-4);
-    list-style: none;
-    padding: 0;
-    margin: 0;
-  }
-
-  .post-nav__next {
-    justify-self: end;
-  }
-
-  .post-nav a {
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-1);
-    padding: var(--space-3) var(--space-4);
-    border: 1px solid var(--color-rule);
-    border-radius: var(--radius-md);
-    color: var(--color-fg);
-    text-decoration: none;
-    min-height: 44px;
-    transition: border-color 150ms ease;
-  }
-
-  .post-nav a:hover,
-  .post-nav a:focus-visible {
-    border-color: var(--color-rule-strong);
-  }
-
-  .post-nav a.next {
-    text-align: end;
-  }
-
-  .post-nav .post-nav__label {
-    color: var(--color-muted);
-    font-size: var(--fs-caption);
-  }
-
-  .post-nav .post-nav__title {
-    color: var(--color-fg);
-    font-weight: var(--weight-semibold);
-  }
-
-  .post-toc {
-    margin-top: var(--space-6);
-    padding: var(--space-3) var(--space-4);
-    border-inline-start: 2px solid var(--color-rule);
-    font-size: var(--fs-caption);
-    color: var(--color-muted);
-    max-height: 60vh;
-    overflow-y: auto;
-  }
-
-  .post-toc .post-nav__title,
-  .post-header h1,
-  .post-nav .post-nav__title,
-  .project-card h3 {
-    overflow-wrap: anywhere;
-  }
-
-  .post-toc ol {
-    list-style: none;
-    padding: 0;
-    margin: 0;
-    display: flex;
-    flex-direction: column;
-    gap: var(--space-1);
-  }
-
-  .post-toc a {
-    display: inline-flex;
-    align-items: center;
-    min-block-size: 24px;
-    padding-block: 2px;
-    color: var(--color-muted);
-    text-decoration: none;
-  }
-
-  .post-toc a:hover,
-  .post-toc a:focus-visible {
-    color: var(--color-fg);
-  }
-
-  .post-gallery {
-    list-style: none;
-    padding: 0;
-    margin: var(--space-8) 0 0;
-    display: grid;
-    gap: var(--space-6);
-  }
-
-  .post > .post-gallery {
-    width: 100%;
-  }
-
-  .post-gallery .post-media {
-    max-inline-size: 100%;
-    margin: 0;
-  }
-
-  .external-link-icon {
-    display: inline-block;
-    margin-inline-start: 0.25em;
-    vertical-align: -0.125em;
-    opacity: 0.85;
-  }
-
-  .related-posts {
-    margin-top: var(--space-12);
-    padding-top: var(--space-6);
-    border-top: 1px solid var(--color-rule);
-  }
-
-  .related-posts h2 {
-    font-size: var(--fs-lg);
-    font-weight: var(--weight-semibold);
-    margin-bottom: var(--space-4);
-  }
-
-  .empty-state {
-    max-width: var(--measure);
-    padding-block: var(--space-6);
-  }
-
-  .theme-switcher {
-    --switcher-w: 2.75rem;
-    --switcher-h: 1.5rem;
-    --switcher-icon: 1.05rem;
-    --switcher-gap: 0.22rem;
-
-    position: relative;
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    width: var(--switcher-w);
-    height: var(--switcher-h);
-    /* Adjacent header targets remain at least 44px apart while the visual
-       track stays compact. */
-    margin: max(var(--space-2), calc((44px - var(--switcher-h)) / 2)) 0;
-    overflow: hidden;
-    border: 1px solid var(--color-rule-medium);
-    border-radius: var(--radius-pill);
-    appearance: none;
-    cursor: pointer;
-    background: var(--theme-switcher-track);
-    color: inherit;
-    transition:
-      background-color 200ms ease,
-      border-color 150ms ease;
-    box-shadow: inset 0 1px 2px rgb(0 0 0 / 18%);
-  }
-
-  .theme-switcher:hover {
-    border-color: var(--color-rule-strong);
-  }
-
-  .no-js .theme-switcher {
-    display: none !important;
-  }
-
-  .theme-switcher-icon {
-    position: absolute;
-    top: 50%;
-    left: 0;
-    width: var(--switcher-icon);
-    height: var(--switcher-icon);
-    pointer-events: none;
-    transition:
-      transform 180ms ease,
-      opacity 180ms ease,
-      color 180ms ease;
-  }
-
-  .theme-switcher-icon-sun {
-    color: var(--theme-switcher-icon-light);
-  }
-
-  .theme-switcher-icon-moon {
-    color: var(--theme-switcher-icon-dark);
-  }
-
-  .theme-switcher[aria-pressed='false'] .theme-switcher-icon-sun {
-    transform: translateY(-50%)
-      translateX(calc(var(--switcher-w) - var(--switcher-icon) - var(--switcher-gap)));
-    opacity: 1;
-  }
-
-  .theme-switcher[aria-pressed='false'] .theme-switcher-icon-moon {
-    transform: translateY(-50%) translateX(calc(-1 * var(--switcher-icon)));
-    opacity: 0;
-  }
-
-  .theme-switcher[aria-pressed='true'] .theme-switcher-icon-sun {
-    transform: translateY(-50%) translateX(var(--switcher-w));
-    opacity: 0;
-  }
-
-  .theme-switcher[aria-pressed='true'] .theme-switcher-icon-moon {
-    transform: translateY(-50%) translateX(var(--switcher-gap));
-    opacity: 1;
-  }
-
-  /* High-contrast / forced-colors fallback: render a text label. */
-  @media (forced-colors: active) {
-    .theme-switcher {
-      width: auto;
-      height: auto;
-      min-block-size: 44px;
-      min-inline-size: 44px;
-      display: inline-flex;
-      align-items: center;
-      justify-content: center;
-      padding: var(--space-1) var(--space-2);
-      overflow: visible;
-      background: ButtonFace;
-      color: ButtonText;
-      border: 1px solid ButtonBorder;
-      box-shadow: none;
-    }
-
-    .theme-switcher-icon {
-      display: none;
-    }
-
-    .theme-switcher::before {
-      content: 'Light';
-      position: static;
-      width: auto;
-      height: auto;
-      transform: none;
-      background: transparent;
-      border-radius: 0;
-    }
-
-    .theme-switcher[aria-pressed='true']::before {
-      content: 'Dark';
-      transform: none;
-    }
-  }
-}
-
-@layer overrides {
-  /* Tablet */
-  @media (max-width: 960px) {
-    .article-list > li {
-      grid-template-columns: 5rem minmax(0, 1fr) 7rem;
-      gap: var(--space-4);
-      padding-block: var(--space-5);
-    }
-
-    .article-list--timeline {
-      --timeline-date-column: 5.75rem;
-      --timeline-gap: var(--space-4);
-      --timeline-date-offset: 1.125rem;
-    }
-
-    .article-list--timeline > li {
-      grid-template-columns:
-        var(--timeline-date-column) var(--timeline-marker-column) minmax(0, 1fr)
-        7rem;
-      grid-template-areas: 'date marker content thumb';
-      column-gap: var(--timeline-gap);
-    }
-
-    .starting-points {
-      grid-template-columns: repeat(3, minmax(0, 1fr));
-    }
-  }
-
-  /* Mobile */
-  @media (max-width: 700px) {
-    .site-header {
-      padding-block: var(--space-6) var(--space-4);
-    }
-
-    .home-intro {
-      padding-block: var(--space-6) var(--space-5);
-    }
-
-    .home-section {
-      margin-top: var(--space-6);
-    }
-
-    .page-shell {
-      margin-top: 0;
-    }
-
-    .at-a-glance__row,
-    .facts dl > div {
-      grid-template-columns: 1fr;
-      gap: var(--space-1);
-    }
-
-    .article-list > li {
-      grid-template-columns: clamp(4rem, 22vw, 5rem) minmax(0, 1fr);
-      grid-template-areas:
-        'thumb content'
-        'date content';
-      gap: var(--space-2) var(--space-3);
-      padding-block: var(--space-4);
-    }
-
-    .article-list--timeline {
-      --timeline-date-column: clamp(3.75rem, 18vw, 4.75rem);
-      --timeline-marker-column: 1rem;
-      --timeline-marker-offset: 0.5rem;
-      --timeline-gap: var(--space-3);
-      --timeline-date-offset: 0.875rem;
-      --timeline-dot-top: 2.1875rem;
-    }
-
-    .article-list--timeline > li {
-      grid-template-columns:
-        var(--timeline-date-column) var(--timeline-marker-column)
-        minmax(0, 1fr);
-      grid-template-areas:
-        'date marker content'
-        'thumb marker content';
-      gap: var(--space-2) var(--timeline-gap);
-    }
-
-    .article-list > li > article {
-      padding-right: 0;
-    }
-
-    .article-list time {
-      text-align: start;
-      white-space: nowrap;
-    }
-
-    .article-list--timeline time {
-      align-self: start;
-      margin-block-start: var(--space-3);
-      font-size: var(--fs-xs);
-      text-align: center;
-    }
-
-    .article-list .entry-thumbnail {
-      aspect-ratio: 1;
-    }
-
-    .starting-points {
-      display: block;
-      padding-top: 0;
-    }
-
-    .starting-points > li {
-      display: grid;
-      grid-template-columns: 4rem minmax(0, 1fr);
-      align-items: center;
-      gap: var(--space-3);
-      padding-block: var(--space-3);
-      border-top: 1px solid var(--color-rule);
-    }
-
-    .starting-points > li:first-child {
-      border-top: 0;
-    }
-
-    .starting-point__thumbnail {
-      aspect-ratio: 1;
-    }
-
-    .starting-point__body {
-      padding-block-start: 0;
-    }
-
-    .project-list {
-      grid-template-columns: repeat(2, minmax(0, 1fr));
-      gap: var(--space-3);
-    }
-
-    .project-card__summary {
-      padding: var(--space-2) var(--space-3);
-    }
-
-    .page-header,
-    .post-header {
-      padding-block: var(--space-6) var(--space-4);
-    }
-
-    .post > .prose {
-      margin-top: var(--space-6);
-    }
-
-    .prose {
-      line-height: 1.55;
-    }
-
-    .prose code {
-      overflow-wrap: anywhere;
-    }
-
-    .prose pre {
-      overflow-x: hidden;
-      scrollbar-gutter: auto;
-      white-space: pre-wrap;
-    }
-
-    .prose pre code,
-    .prose pre .line {
-      overflow-wrap: anywhere;
-      white-space: pre-wrap;
-    }
-
-    .tag-filter {
-      display: block;
-      margin-bottom: var(--space-5);
-      padding-block: var(--space-2);
-    }
-
-    .tag-filter .tag-list {
-      gap: 0 var(--space-3);
-      margin-top: var(--space-2);
-    }
-
-    .tag-list {
-      gap: 0 var(--space-3);
-    }
-
-    :focus-visible {
-      outline-offset: 1px;
-    }
-
-    /* Preserve the inset outline on <main> so the post-skip-link focus ring
-       doesn't escape its container. Repeated here because this layer wins
-       over the base rule regardless of selector specificity. */
-    main:focus-visible {
-      outline-offset: -2px;
-    }
-
-    .post-nav__list {
-      grid-template-columns: 1fr;
-    }
-
-    .post-nav__next {
-      justify-self: stretch;
-    }
-
-    .post-nav a.next {
-      text-align: start;
-    }
-
-    .header-actions {
-      justify-content: space-between;
-      width: 100%;
-      gap: var(--space-2) var(--space-4);
-    }
-
-    .site-nav {
-      gap: var(--space-1) var(--space-6);
-    }
-
-    .footer-meta,
-    .footer-contact {
-      gap: var(--space-2);
-    }
-
-    .footer-meta {
-      font-size: var(--fs-xs);
-    }
-  }
-
-  @media (min-width: 430px) and (max-width: 700px) {
-    .post > .prose > p,
-    .page-shell--full-width > .about-copy > p {
-      text-align: justify;
-      text-align-last: start;
-      text-justify: auto;
-      overflow-wrap: normal;
-      word-break: normal;
-    }
-  }
-
-  @media (min-width: 701px) {
-    .page-shell--full-width > .about-copy > p {
-      text-align: justify;
-      text-align-last: start;
-      text-justify: auto;
-      overflow-wrap: normal;
-      word-break: normal;
-    }
-  }
-
-  @media (max-width: 360px) {
-    .site-header {
-      position: relative;
-    }
-
-    .theme-switcher {
-      position: absolute;
-      inset-block-start: var(--space-6);
-      inset-inline-end: 0;
-      margin: 0;
-    }
-
-    .header-actions,
-    .site-nav {
-      column-gap: var(--space-3);
-    }
-
-    .footer-name {
-      display: none;
-    }
-  }
-
-  /* Reduced motion */
-  @media (prefers-reduced-motion: reduce) {
-    html {
-      scroll-behavior: auto;
-    }
-
-    *,
-    *::before,
-    *::after {
-      animation-duration: 0.01ms !important;
-      animation-iteration-count: 1 !important;
-      transition-duration: 0.01ms !important;
-    }
-
-    ::view-transition-group(*),
-    ::view-transition-old(*),
-    ::view-transition-new(*) {
-      animation: none;
-    }
-  }
-
-  /* Print */
-  @media print {
-    :root {
-      --color-bg: #fff;
-      --color-fg: #000;
-      --color-muted: #333;
-      --color-link: #000;
-      --color-link-hover: #000;
-      --color-accent: #000;
-      --color-rule: #999;
-      --color-rule-medium: #777;
-      --color-rule-strong: #333;
-      --color-code-bg: #f4f4f4;
-      --color-callout-bg: #f8f8f8;
-    }
-
-    body {
-      font-size: 11pt;
-      line-height: 1.4;
-    }
-
-    *,
-    *::before,
-    *::after {
-      print-color-adjust: economy;
-    }
-
-    .site-header,
-    .site-footer,
-    .skip-link,
-    .theme-switcher,
-    .tag-filter,
-    .post-nav,
-    .related-posts,
-    .heading-anchor {
-      display: none;
-    }
-
-    main {
-      padding: 0;
-    }
-
-    a,
-    a:visited {
-      color: var(--color-fg);
-      text-decoration: underline;
-    }
-
-    .prose a[href]::after {
-      content: ' (' attr(href) ')';
-      font-size: 0.85em;
-      color: var(--color-muted);
-    }
-
-    .prose a[href^='#']::after,
-    .prose a[href^='/']::after {
-      content: '';
-    }
-
-    .prose pre,
-    .prose code,
-    .post-thumbnail img,
-    .post-media img {
-      page-break-inside: avoid;
-    }
-
-    .prose h2,
-    .prose h3 {
-      page-break-after: avoid;
-    }
-  }
-}
+/* Style entry point. This file only wires the partials together; all rules
+   live in the imports below. Cascade order is fixed by the @layer statement in
+   layers.css (loaded first), so the import order here is for human readability
+   and does not affect specificity resolution. Base.astro imports this file. */
+
+@import './fonts.css';
+@import './layers.css';
+@import './tokens.css';
+
+@import './reset.css';
+@import './base.css';
+@import './utilities.css';
+@import './layout.css';
+
+@import './components/headings-and-tags.css';
+@import './components/listings.css';
+@import './components/project-card.css';
+@import './components/sections.css';
+@import './components/thumbnails.css';
+@import './components/prose.css';
+@import './components/post.css';
+@import './components/theme-switcher.css';
+
+@import './overrides.css';
diff --git a/src/styles/layers.css b/src/styles/layers.css
new file mode 100644
index 0000000..a6a61f9
--- /dev/null
+++ b/src/styles/layers.css
@@ -0,0 +1,2 @@
+/* Cascade layer order, declared once so partials can be authored in any order. */
+@layer reset, base, layout, components, utilities, overrides;
diff --git a/src/styles/layout.css b/src/styles/layout.css
new file mode 100644
index 0000000..55ea899
--- /dev/null
+++ b/src/styles/layout.css
@@ -0,0 +1,196 @@
+/* Layout layer: page-width shell, header, footer, nav, page/post headers. */
+@layer layout {
+  :where(.site-header, .site-footer, .home-intro, .home-section, .page-shell, .post) {
+    width: min(100% - 2 * var(--gutter), var(--page));
+    margin-inline: auto;
+  }
+
+  .post {
+    width: min(100% - 2 * var(--gutter), var(--measure-wide));
+  }
+
+  .skip-link {
+    position: absolute;
+    left: calc(var(--gutter) + env(safe-area-inset-left));
+    top: calc(var(--space-3) + env(safe-area-inset-top));
+    z-index: 10;
+    transform: translateY(-150%);
+    background: var(--color-fg);
+    color: var(--color-bg);
+    padding: var(--space-3) var(--space-4);
+    min-block-size: 44px;
+    display: inline-flex;
+    align-items: center;
+    text-decoration: none;
+    transition: transform 150ms ease;
+  }
+
+  .skip-link:focus {
+    transform: translateY(0);
+    outline: 2px solid var(--color-accent);
+    outline-offset: 2px;
+  }
+
+  .site-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: var(--space-4);
+    flex-wrap: wrap;
+    padding-block: var(--space-8) var(--space-6);
+    border-bottom: 1px solid var(--color-rule);
+  }
+
+  main {
+    flex: 1 0 auto;
+  }
+
+  .site-title {
+    color: var(--color-fg);
+    font-size: var(--fs-lg);
+    font-weight: var(--weight-bold);
+    letter-spacing: -0.005em;
+    text-decoration: none;
+  }
+
+  .header-actions {
+    display: flex;
+    align-items: center;
+    flex-wrap: wrap;
+    gap: var(--space-2) var(--space-6);
+    min-width: 0;
+  }
+
+  .site-nav {
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--space-1) var(--space-5);
+  }
+
+  .site-nav a,
+  .site-footer a {
+    min-height: 44px;
+    display: inline-flex;
+    align-items: center;
+    color: var(--color-muted);
+    text-decoration: none;
+  }
+
+  .site-nav a:hover,
+  .site-footer a:hover {
+    color: var(--color-fg);
+    text-decoration: underline;
+    text-underline-offset: 0.25em;
+  }
+
+  .site-nav a[aria-current='page'],
+  .site-nav a[aria-current='true'] {
+    color: var(--color-fg);
+  }
+
+  .site-footer {
+    border-top: 1px solid var(--color-rule);
+    margin-top: var(--space-16);
+    padding-block: var(--space-8) var(--space-10);
+  }
+
+  .footer-meta {
+    display: flex;
+    align-items: center;
+    flex-wrap: nowrap;
+    gap: var(--space-2) var(--space-5);
+    margin: 0;
+    padding: 0;
+    list-style: none;
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+    white-space: nowrap;
+  }
+
+  .footer-meta a,
+  .footer-meta > span {
+    min-height: 44px;
+    display: inline-flex;
+    align-items: center;
+  }
+
+  .footer-meta a {
+    padding-inline: var(--space-1);
+    margin-inline: calc(-1 * var(--space-1));
+  }
+
+  .footer-copyright {
+    gap: 0.25em;
+  }
+
+  .footer-contact {
+    display: flex;
+    align-items: center;
+    flex-wrap: nowrap;
+    gap: var(--space-2) var(--space-5);
+    min-width: 0;
+  }
+
+  /* Page header (shared by .home-intro, .page-header, .post-header) */
+  .home-intro {
+    padding-block: clamp(2rem, 5vw, 4rem) var(--space-6);
+  }
+
+  .home-intro h1,
+  .page-header h1,
+  .post-header h1 {
+    max-width: var(--measure-wide);
+    color: var(--color-fg);
+    font-size: var(--fs-3xl);
+    font-weight: var(--weight-semibold);
+    line-height: var(--leading-tight);
+    text-wrap: balance;
+  }
+
+  .home-intro-name {
+    color: var(--color-accent);
+  }
+
+  .home-intro p:not(.eyebrow),
+  .page-header p,
+  .dek {
+    max-width: var(--measure);
+    color: var(--color-muted);
+    font-size: var(--fs-dek);
+  }
+
+  .post-header {
+    max-width: var(--measure-wide);
+    padding-block: var(--space-10) var(--space-6);
+  }
+
+  .page-header {
+    max-width: var(--measure-wide);
+    padding-block: var(--space-2) var(--space-6);
+  }
+
+  .page-shell--full-width .page-header,
+  .page-shell--full-width .page-header p,
+  .page-shell--full-width .about-copy,
+  .page-shell--full-width > .about-copy > p {
+    width: 100%;
+    max-width: none;
+    max-inline-size: none;
+  }
+
+  .post-header .dek {
+    margin-block: var(--space-4) 0;
+  }
+
+  .post-meta {
+    margin-block: var(--space-3) 0;
+    color: var(--color-muted);
+    font-size: var(--fs-caption);
+    line-height: 1.4;
+  }
+
+  .home-section,
+  .page-shell {
+    margin-top: var(--space-8);
+  }
+}
diff --git a/src/styles/overrides.css b/src/styles/overrides.css
new file mode 100644
index 0000000..1d44599
--- /dev/null
+++ b/src/styles/overrides.css
@@ -0,0 +1,359 @@
+/* Overrides layer: responsive breakpoints, reduced-motion, print. */
+@layer overrides {
+  /* Tablet */
+  @media (max-width: 960px) {
+    .article-list > li {
+      grid-template-columns: 5rem minmax(0, 1fr) 7rem;
+      gap: var(--space-4);
+      padding-block: var(--space-5);
+    }
+
+    .article-list--timeline {
+      --timeline-date-column: 5.75rem;
+      --timeline-gap: var(--space-4);
+      --timeline-date-offset: 1.125rem;
+    }
+
+    .article-list--timeline > li {
+      grid-template-columns:
+        var(--timeline-date-column) var(--timeline-marker-column) minmax(0, 1fr)
+        7rem;
+      grid-template-areas: 'date marker content thumb';
+      column-gap: var(--timeline-gap);
+    }
+
+    .starting-points {
+      grid-template-columns: repeat(3, minmax(0, 1fr));
+    }
+  }
+
+  /* Mobile */
+  @media (max-width: 700px) {
+    .site-header {
+      padding-block: var(--space-6) var(--space-4);
+    }
+
+    .home-intro {
+      padding-block: var(--space-6) var(--space-5);
+    }
+
+    .home-section {
+      margin-top: var(--space-6);
+    }
+
+    .page-shell {
+      margin-top: 0;
+    }
+
+    .at-a-glance__row,
+    .facts dl > div {
+      grid-template-columns: 1fr;
+      gap: var(--space-1);
+    }
+
+    .article-list > li {
+      grid-template-columns: clamp(4rem, 22vw, 5rem) minmax(0, 1fr);
+      grid-template-areas:
+        'thumb content'
+        'date content';
+      gap: var(--space-2) var(--space-3);
+      padding-block: var(--space-4);
+    }
+
+    .article-list--timeline {
+      --timeline-date-column: clamp(3.75rem, 18vw, 4.75rem);
+      --timeline-marker-column: 1rem;
+      --timeline-marker-offset: 0.5rem;
+      --timeline-gap: var(--space-3);
+      --timeline-date-offset: 0.875rem;
+      --timeline-dot-top: 2.1875rem;
+    }
+
+    .article-list--timeline > li {
+      grid-template-columns:
+        var(--timeline-date-column) var(--timeline-marker-column)
+        minmax(0, 1fr);
+      grid-template-areas:
+        'date marker content'
+        'thumb marker content';
+      gap: var(--space-2) var(--timeline-gap);
+    }
+
+    .article-list > li > article {
+      padding-right: 0;
+    }
+
+    .article-list time {
+      text-align: start;
+      white-space: nowrap;
+    }
+
+    .article-list--timeline time {
+      align-self: start;
+      margin-block-start: var(--space-3);
+      font-size: var(--fs-xs);
+      text-align: center;
+    }
+
+    .article-list .entry-thumbnail {
+      aspect-ratio: 1;
+    }
+
+    .starting-points {
+      display: block;
+      padding-top: 0;
+    }
+
+    .starting-points > li {
+      display: grid;
+      grid-template-columns: 4rem minmax(0, 1fr);
+      align-items: center;
+      gap: var(--space-3);
+      padding-block: var(--space-3);
+      border-top: 1px solid var(--color-rule);
+    }
+
+    .starting-points > li:first-child {
+      border-top: 0;
+    }
+
+    .starting-point__thumbnail {
+      aspect-ratio: 1;
+    }
+
+    .starting-point__body {
+      padding-block-start: 0;
+    }
+
+    .project-list {
+      grid-template-columns: repeat(2, minmax(0, 1fr));
+      gap: var(--space-3);
+    }
+
+    .project-card__summary {
+      padding: var(--space-2) var(--space-3);
+    }
+
+    .page-header,
+    .post-header {
+      padding-block: var(--space-6) var(--space-4);
+    }
+
+    .post > .prose {
+      margin-top: var(--space-6);
+    }
+
+    .prose {
+      line-height: 1.55;
+    }
+
+    .prose code {
+      overflow-wrap: anywhere;
+    }
+
+    .prose pre {
+      overflow-x: hidden;
+      scrollbar-gutter: auto;
+      white-space: pre-wrap;
+    }
+
+    .prose pre code,
+    .prose pre .line {
+      overflow-wrap: anywhere;
+      white-space: pre-wrap;
+    }
+
+    .tag-filter {
+      display: block;
+      margin-bottom: var(--space-5);
+      padding-block: var(--space-2);
+    }
+
+    .tag-filter .tag-list {
+      gap: 0 var(--space-3);
+      margin-top: var(--space-2);
+    }
+
+    .tag-list {
+      gap: 0 var(--space-3);
+    }
+
+    :focus-visible {
+      outline-offset: 1px;
+    }
+
+    /* Preserve the inset outline on <main> so the post-skip-link focus ring
+       doesn't escape its container. Repeated here because this layer wins
+       over the base rule regardless of selector specificity. */
+    main:focus-visible {
+      outline-offset: -2px;
+    }
+
+    .post-nav__list {
+      grid-template-columns: 1fr;
+    }
+
+    .post-nav__next {
+      justify-self: stretch;
+    }
+
+    .post-nav a.next {
+      text-align: start;
+    }
+
+    .header-actions {
+      justify-content: space-between;
+      width: 100%;
+      gap: var(--space-2) var(--space-4);
+    }
+
+    .site-nav {
+      gap: var(--space-1) var(--space-6);
+    }
+
+    .footer-meta,
+    .footer-contact {
+      gap: var(--space-2);
+    }
+
+    .footer-meta {
+      font-size: var(--fs-xs);
+    }
+  }
+
+  @media (min-width: 430px) and (max-width: 700px) {
+    .post > .prose > p,
+    .page-shell--full-width > .about-copy > p {
+      text-align: justify;
+      text-align-last: start;
+      text-justify: auto;
+      overflow-wrap: normal;
+      word-break: normal;
+    }
+  }
+
+  @media (min-width: 701px) {
+    .page-shell--full-width > .about-copy > p {
+      text-align: justify;
+      text-align-last: start;
+      text-justify: auto;
+      overflow-wrap: normal;
+      word-break: normal;
+    }
+  }
+
+  @media (max-width: 360px) {
+    .site-header {
+      position: relative;
+    }
+
+    .theme-switcher {
+      position: absolute;
+      inset-block-start: var(--space-6);
+      inset-inline-end: 0;
+      margin: 0;
+    }
+
+    .header-actions,
+    .site-nav {
+      column-gap: var(--space-3);
+    }
+
+    .footer-name {
+      display: none;
+    }
+  }
+
+  /* Reduced motion */
+  @media (prefers-reduced-motion: reduce) {
+    html {
+      scroll-behavior: auto;
+    }
+
+    *,
+    *::before,
+    *::after {
+      animation-duration: 0.01ms !important;
+      animation-iteration-count: 1 !important;
+      transition-duration: 0.01ms !important;
+    }
+
+    ::view-transition-group(*),
+    ::view-transition-old(*),
+    ::view-transition-new(*) {
+      animation: none;
+    }
+  }
+
+  /* Print */
+  @media print {
+    :root {
+      --color-bg: #fff;
+      --color-fg: #000;
+      --color-muted: #333;
+      --color-link: #000;
+      --color-link-hover: #000;
+      --color-accent: #000;
+      --color-rule: #999;
+      --color-rule-medium: #777;
+      --color-rule-strong: #333;
+      --color-code-bg: #f4f4f4;
+      --color-callout-bg: #f8f8f8;
+    }
+
+    body {
+      font-size: 11pt;
+      line-height: 1.4;
+    }
+
+    *,
+    *::before,
+    *::after {
+      print-color-adjust: economy;
+    }
+
+    .site-header,
+    .site-footer,
+    .skip-link,
+    .theme-switcher,
+    .tag-filter,
+    .post-nav,
+    .related-posts,
+    .heading-anchor {
+      display: none;
+    }
+
+    main {
+      padding: 0;
+    }
+
+    a,
+    a:visited {
+      color: var(--color-fg);
+      text-decoration: underline;
+    }
+
+    .prose a[href]::after {
+      content: ' (' attr(href) ')';
+      font-size: 0.85em;
+      color: var(--color-muted);
+    }
+
+    .prose a[href^='#']::after,
+    .prose a[href^='/']::after {
+      content: '';
+    }
+
+    .prose pre,
+    .prose code,
+    .post-thumbnail img,
+    .post-media img {
+      page-break-inside: avoid;
+    }
+
+    .prose h2,
+    .prose h3 {
+      page-break-after: avoid;
+    }
+  }
+}
diff --git a/src/styles/reset.css b/src/styles/reset.css
new file mode 100644
index 0000000..3f22bd5
--- /dev/null
+++ b/src/styles/reset.css
@@ -0,0 +1,45 @@
+/* Reset layer: box-sizing, margin zeroing, list/media/form-control normalization. */
+@layer reset {
+  *,
+  *::before,
+  *::after {
+    box-sizing: border-box;
+  }
+
+  body,
+  h1,
+  h2,
+  h3,
+  h4,
+  h5,
+  h6,
+  p,
+  figure,
+  blockquote,
+  dl,
+  dd {
+    margin: 0;
+  }
+
+  ul[role='list'],
+  ol[role='list'] {
+    list-style: none;
+    padding: 0;
+  }
+
+  button,
+  input,
+  textarea,
+  select {
+    font: inherit;
+  }
+
+  img,
+  video,
+  canvas,
+  svg {
+    display: block;
+    max-width: 100%;
+    height: auto;
+  }
+}
diff --git a/src/styles/tokens.css b/src/styles/tokens.css
new file mode 100644
index 0000000..111e26a
--- /dev/null
+++ b/src/styles/tokens.css
@@ -0,0 +1,97 @@
+/* Design tokens: color palette (light-dark()), type scale, spacing, radii, layout. */
+:root {
+  color-scheme: light dark;
+
+  --font-sans:
+    'Source Sans 3', Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
+    'Segoe UI', sans-serif;
+  --font-mono: 'IBM Plex Mono', 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
+
+  /* Palette: light-dark() pairs each token (light, dark) */
+  /* Keep --color-bg in sync with THEME_BG in src/lib/site.ts, which drives the
+     browser-chrome theme-color metas (CSS cannot import those values). */
+  --color-bg: light-dark(#fbfaf7, #201f1d);
+  --color-fg: light-dark(#181817, #d8d0c3);
+  /* Contrast with --color-bg: light ~5.4:1, dark ~6.5:1 (both clear WCAG AA
+     4.5:1 for normal text). Darken-on-light / lighten-on-dark slightly from
+     the previous values that fell just below threshold. */
+  --color-muted: light-dark(#3d3b35, #aaa299);
+  --color-link: light-dark(#1e4d5e, #7fa8b7);
+  --color-link-hover: light-dark(
+    color-mix(in oklch, #1e4d5e 70%, black 30%),
+    color-mix(in oklch, #7fa8b7 80%, white 20%)
+  );
+  --color-accent: light-dark(oklch(55% 0.13 15), oklch(68% 0.11 15));
+  --color-rule: light-dark(#bcb5a3, #5a5247);
+  --color-rule-medium: light-dark(#7a7466, #70695f);
+  --color-rule-strong: light-dark(#4a4340, #aaa196);
+  --color-code-bg: light-dark(#efede6, #2a2824);
+  --color-callout-bg: light-dark(#f4f1e8, #292723);
+  --color-selection-bg: light-dark(#ecddd0, #4a3a2e);
+
+  --theme-switcher-track: var(--color-rule-medium);
+  --theme-switcher-icon-light: #f0e2b6;
+  --theme-switcher-icon-dark: #d8d0c3;
+
+  /* Typography */
+  --fs-xs: 0.75rem;
+  --fs-sm: 0.8125rem;
+  --fs-caption: 0.875rem;
+  --fs-base: 1rem;
+  --fs-body: 1.1875rem;
+  --fs-lg: 1.25rem;
+  --fs-xl: 1.75rem;
+  --fs-3xl: clamp(2rem, 1.5rem + 1.8vw, 3rem);
+  --fs-dek: clamp(1.08rem, 0.95rem + 0.6vw, 1.25rem);
+
+  --leading-tight: 1.18;
+  --leading-snug: 1.35;
+  --leading-prose: 1.6;
+
+  --weight-regular: 400;
+  --weight-medium: 500;
+  --weight-semibold: 650;
+  --weight-bold: 700;
+
+  /* Spacing */
+  --space-1: 0.25rem;
+  --space-2: 0.5rem;
+  --space-3: 0.75rem;
+  --space-4: 1rem;
+  --space-5: 1.25rem;
+  --space-6: 1.5rem;
+  --space-8: 2rem;
+  --space-10: 2.5rem;
+  --space-12: 3rem;
+  --space-16: 4rem;
+
+  /* Radius */
+  --radius-sm: 4px;
+  --radius-md: 6px;
+  --radius-lg: 8px;
+  --radius-pill: 999px;
+
+  /* Layout */
+  --measure: 36rem;
+  --measure-wide: 56rem;
+  --page: 72rem;
+  --gutter: clamp(20px, 4vw, 32px);
+}
+
+:root[data-theme='light'] {
+  color-scheme: light;
+}
+
+:root[data-theme='dark'] {
+  color-scheme: dark;
+}
+
+@media (max-width: 700px) {
+  :root {
+    --fs-body: 1.0625rem;
+    --fs-dek: 1rem;
+    --fs-lg: 1.125rem;
+    --fs-xl: 1.375rem;
+    --fs-3xl: 1.75rem;
+  }
+}
diff --git a/src/styles/utilities.css b/src/styles/utilities.css
new file mode 100644
index 0000000..5ba93a5
--- /dev/null
+++ b/src/styles/utilities.css
@@ -0,0 +1,14 @@
+/* Utilities layer: single-purpose helpers (.sr-only). */
+@layer utilities {
+  .sr-only {
+    position: absolute;
+    width: 1px;
+    height: 1px;
+    padding: 0;
+    margin: -1px;
+    overflow: hidden;
+    clip-path: inset(50%);
+    white-space: nowrap;
+    border: 0;
+  }
+}