/* site.css v18 */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

:focus-visible {
  outline: 3px solid #202124;
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: .75rem 1rem;
  background: #fff;
  border: 2px solid #202124;
  transform: translateY(-200%);
}

.skip-link:focus { transform: none; }

body {
  margin: 0;
  font: 1.125rem/1.65 system-ui, sans-serif;
  color: #202124;
  background: #fff;
}

a {
  color: inherit;
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

a:hover { color: #5f6870; }

/* Plain-language technical definitions remain part of prose rather than
   becoming inline buttons. The dashed underline distinguishes definitions
   from the site's solid-underlined hyperlinks without relying on color. */
.define {
  display: inline;
}

.define > dfn {
  font-style: normal;
  cursor: help;
  text-decoration-line: underline;
  text-decoration-style: dashed;
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
  text-decoration-skip-ink: auto;
}

.definition {
  display: none;
  position: fixed;
  z-index: 20;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  width: auto;
  max-width: 26rem;
  margin-inline: auto;
  padding: .75rem .875rem;
  border: 1px solid #e3e6e8;
  border-radius: .5rem;
  background: #fff;
  color: #202124;
  box-shadow: 0 .5rem 1.5rem rgb(0 0 0 / .16);
  font-size: 1rem;
  line-height: 1.45;
}

.define:hover > .definition,
.define:focus-within > .definition {
  display: block;
}

/* Where CSS anchor positioning is supported, tether the definition to its term
   and let the browser flip it when the preferred position would overflow. */
@supports (anchor-scope: all) {
  .define {
    anchor-scope: --definition-anchor;
  }

  .define > dfn {
    anchor-name: --definition-anchor;
  }

  .definition {
    position-anchor: --definition-anchor;
    inset: auto;
    top: calc(anchor(bottom) + .5rem);
    left: anchor(left);
    width: max-content;
    max-width: min(26rem, calc(100vw - 2rem));
    margin: 0;
    position-try-fallbacks: flip-inline, flip-block, flip-start;
  }
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  max-width: 1200px;
  margin: auto;
  padding: 1.25rem 1.875rem;
  border-bottom: 1px solid #e3e6e8;
}

.site-name {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 1.125rem;
  font-weight: 700;
  text-decoration: none;
}

.primary-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .25rem 1rem;
  font-size: 1rem;
}

.primary-nav a,
.actions a,
.links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.primary-nav a { padding: .4rem .15rem; }


.breadcrumb {
  max-width: 760px;
  margin: 0 auto 2rem;
  font-size: .9375rem;
  line-height: 1.5;
  color: #687078;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  display: inline-flex;
  align-items: baseline;
}

.breadcrumb li + li::before {
  content: "⇒";
  margin-right: .5rem;
  color: #687078;
}

.breadcrumb a {
  color: inherit;
}

.breadcrumb [aria-current="page"] {
  color: #202124;
}

main {
  max-width: 1200px;
  margin: auto;
  padding: 5.5rem 1.875rem;
}

.page-header,
.narrow,
.project > p,
.project > h3,
.project > .meta,
.project > .links,
figcaption {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.meta {
  margin-bottom: 1.375rem;
  font-size: .875rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #687078;
}

h1 {
  max-width: 980px;
  margin: 0 0 1.875rem;
  font-size: clamp(2.875rem, 6.5vw, 4.875rem);
  line-height: 1.05;
}

.lead {
  max-width: 800px;
  margin: 0;
  font-size: clamp(1.375rem, 2.7vw, 1.875rem);
  line-height: 1.4;
  color: #5d646a;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.75rem;
  margin-top: 2.125rem;
  font-size: 1rem;
  font-weight: 700;
}

.actions a,
.links a { padding-block: .4rem; }

/* Longer interior pages may provide a compact table of contents.
   This is navigation, not an action/CTA group, so keep it vertical. */
.page-nav {
  margin-top: 3.5rem;
}

.page-nav .meta {
  margin-bottom: .75rem;
}

.page-nav ul {
  margin: 0;
  padding-left: 1.25rem;
}

.page-nav li + li {
  margin-top: .25rem;
}

/* Profile/header treatment for identity pages such as /about/.
   Keep the portrait restrained, centered, and subordinate to the introduction. */
.profile-header {
  max-width: 980px;
}

.profile-header-copy {
  max-width: 760px;
  margin-inline: auto;
}

.profile-photo {
  width: 100%;
  max-width: 15rem;
  margin: 2.5rem auto 0;
}

section { margin-top: 7.5rem; }

.section-title {
  margin: 0 0 1.5rem;
  font-size: clamp(2.125rem, 4vw, 3rem);
  line-height: 1.15;
}

/* Shared section permalinks are inserted by /assets/site.js.
   Absolute positioning keeps the marker outside normal flow so headings never move. */
.anchor-heading {
  position: relative;
}

.heading-anchor {
  position: absolute;
  right: 100%;
  top: 0;
  padding-right: .5rem;
  opacity: 0;
  pointer-events: none;
  color: #687078;
  font-weight: 400;
  text-decoration: none;
}

.anchor-heading:hover > .heading-anchor,
.anchor-heading:focus-within > .heading-anchor,
section:target .heading-anchor {
  opacity: 1;
  pointer-events: auto;
}

.heading-anchor:hover {
  color: #202124;
}

.intro {
  margin: 0;
  font-size: 1.25rem;
  color: #5d646a;
}

.project { margin-top: 6rem; }

.project h3 {
  margin-top: 0;
  margin-bottom: 1.375rem;
  font-size: clamp(1.875rem, 3.6vw, 2.6875rem);
  line-height: 1.15;
}

.project p {
  margin-top: 0;
  margin-bottom: 1.5rem;
}

.links {
  margin-top: 1.875rem;
  font-size: 1rem;
  font-weight: 700;
}

pre,
code {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

pre {
  max-width: 760px;
  margin: 2rem auto 0;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  background: #f3f3f3;
  border-radius: 6px;
  font-size: .9375rem;
  line-height: 1.6;
}

pre code {
  font: inherit;
  background: none;
}

:not(pre) > code {
  padding: .1em .3em;
  background: #f3f3f3;
  border-radius: 3px;
  font-size: .9em;
}

figure {
  margin: 2.75rem auto 0;
}

.media-wide {
  max-width: 980px;
}

.media-inline {
  max-width: 653px;
}

/* Use one strong image per homepage item when it adds information.
   Reserve multi-image galleries for the detailed project/research/art pages. */

img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

figcaption {
  margin-top: .75rem;
  font-size: .9375rem;
  line-height: 1.5;
  color: #5f6870;
}

.rule {
  max-width: 760px;
  margin: 5.75rem auto 0;
  border: 0;
  border-top: 1px solid #e3e6e8;
}

.proof {
  max-width: 760px;
  margin: 2.125rem auto 0;
  padding: 1.5rem 0;
  border-top: 1px solid #e3e6e8;
  border-bottom: 1px solid #e3e6e8;
  font-size: 1rem;
}

.proof strong {
  display: block;
  margin-bottom: .25rem;
  font-size: 1.375rem;
}

.category-links {
  max-width: 760px;
  margin: 4.5rem auto 0;
  padding-top: 1.75rem;
  border-top: 1px solid #e3e6e8;
}

.category-links p { margin: 0 0 .75rem; }

.category-links a {
  display: inline-block;
  margin-right: 1.5rem;
  font-weight: 700;
}

.site-footer {
  max-width: 760px;
  margin: 7.5rem auto 0;
  padding: 1.75rem 1.875rem 3rem;
  border-top: 1px solid #e3e6e8;
  font-size: .9375rem;
  color: #5f6870;
}

.site-footer p {
  margin: .75rem 0 0;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1rem;
}

.footer-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}


@media print {
  .define > dfn {
    text-decoration: none;
  }

  .definition {
    display: none !important;
  }

  .heading-anchor {
    display: none !important;
  }

  details::details-content {
    content-visibility: visible;
    height: auto !important;
  }

  details > summary {
    list-style: none;
    cursor: default;
  }

  details > summary::-webkit-details-marker {
    display: none;
  }
}

@media (max-width: 700px) {
  .site-header {
    display: block;
    padding: 1rem 1.25rem;
  }

  .primary-nav {
    justify-content: flex-start;
    margin-top: .5rem;
    gap: 0 1rem;
  }

  main { padding: 3.625rem 1.25rem; }

  .page-nav { margin-top: 2.75rem; }

  section { margin-top: 5.25rem; }

  .project { margin-top: 4.25rem; }

  .rule { margin-top: 4.25rem; }

  .category-links a {
    display: block;
    width: fit-content;
    min-height: 44px;
    padding-block: .4rem;
  }

  .site-footer {
    padding-right: 1.25rem;
    padding-left: 1.25rem;
  }

  .footer-nav {
    gap: 0 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}