/* Colors are light/dark pairs (light-dark()). The page follows the system
   setting unless the nav toggle (js/theme.js) sets data-theme on <html>.
   Dark mode keeps body text near 9:1 on a slightly warm gray: very bright
   text on a cool blue-black blooms into the background and tires the eyes. */
:root {
  color-scheme: light dark;

  --paper: light-dark(#fbfbfa, #1e1e1c);
  --ink: light-dark(#1d2228, #c4c1ba);
  --ink-2: light-dark(#59616b, #94918a);
  --ink-3: light-dark(#868d96, #77746d);
  --rule: light-dark(#e2e4e7, #33322f);
  --accent: light-dark(#2b4c9b, #93a5cc);
  --code-bg: light-dark(#eef0f2, #292926);

  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;

  /* Page width, the prose measure (about 70 characters), and the CV's
     timeline column for dates. */
  --measure: 44rem;
  --prose: 38rem;
  --gutter: 5.5rem;
  --gap: 1.75rem;
}

:root[data-theme="light"] {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  letter-spacing: 0.01em;
  max-width: calc(var(--measure) + 2rem);
  margin: 0 auto;
  padding: 2rem 1rem;
  color: var(--ink);
  background: var(--paper);
}

/* Light-on-dark text renders better with thinner smoothing. Spacing is the
   same in both modes so switching themes doesn't reflow the page. */
:root[data-theme="dark"] body {
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body {
    -webkit-font-smoothing: antialiased;
  }
}

a {
  color: inherit;
  text-decoration-color: var(--ink-3);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent);
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Site navigation */

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 1.5rem;
  margin-bottom: 3rem;
  font-family: var(--sans);
  font-size: 0.9375rem;
}

.site-nav a {
  color: var(--ink-2);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.4em;
}

.site-nav .site-title {
  margin-right: auto;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--ink);
}

/* Light/dark toggle (js/theme.js). It shows the mode it switches to. */
.theme-toggle {
  align-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  margin: -0.25rem -0.5rem -0.25rem -0.5rem;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--ink-2);
  cursor: pointer;
}

.theme-toggle[hidden] {
  display: none;
}

.theme-toggle:hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--ink) 8%, transparent);
}

.theme-toggle svg {
  width: 1.1rem;
  height: 1.1rem;
}

.theme-toggle[data-current="dark"] .icon-moon,
.theme-toggle[data-current="light"] .icon-sun {
  display: none;
}

/* Posts and pages */

article header {
  margin-bottom: 1.75rem;
}

article h1 {
  font-size: 2.25rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

/* A page title directly above its body (no date header below it). */
article > h1 {
  margin-bottom: 1.75rem;
}

article header time {
  font-family: var(--sans);
  color: var(--ink-2);
  font-size: 0.875rem;
}

.tags {
  margin-top: 0.5rem;
  font-family: var(--sans);
}

.tag {
  display: inline-block;
  background: var(--code-bg);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  font-size: 0.8125rem;
  margin-right: 0.25rem;
}

.post-list {
  list-style: none;
}

.post-list li + li {
  margin-top: 1.25rem;
}

.post-list time {
  display: block;
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--ink-2);
}

.post-body h1,
.post-body h2,
.post-body h3,
.page-body h2,
.page-body h3 {
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  line-height: 1.3;
}

/* Prose keeps a comfortable measure; link rows can use the full width. */
.post-body :is(p, ul, ol, blockquote):not(.links),
.page-body :is(p, ul, ol, blockquote):not(.links) {
  max-width: var(--prose);
}

.post-body p,
.page-body p {
  margin-bottom: 1em;
}

.page-body > p:first-child {
  font-size: 1.1875rem;
  line-height: 1.6;
}

.post-body ul,
.post-body ol,
.page-body ul,
.page-body ol {
  margin-bottom: 1em;
  padding-left: 1.5rem;
}

.post-body li {
  margin-bottom: 0.25em;
}

code {
  font-family: var(--mono);
  background: var(--code-bg);
  padding: 0.1em 0.3em;
  border-radius: 3px;
  font-size: 0.85em;
}

pre {
  background: #2b303b;
  color: #c0c5ce;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 1em;
}

pre code {
  background: none;
  padding: 0;
}

footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.9375rem;
  color: var(--ink-3);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.25rem 1.25rem;
  letter-spacing: normal;
}

.site-footer a,
.site-footer .contact-email {
  color: var(--ink-2);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer .contact-email:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* Standalone links (rows marked class="links" or {.links}, the CV's contact
   and paper links): one sans size, accent color, set as a row on a line of
   its own. Links inside sentences keep the underlined prose style. A row
   that closes a page gets extra space above it. */
.links,
.cv-links,
.cv-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  font-family: var(--sans);
  font-size: 0.9375rem;
  letter-spacing: normal;
}

.links a,
.cv-links a,
.cv-contact a,
.cv-contact .contact-email {
  color: var(--accent);
  text-decoration: none;
}

.links a:hover,
.cv-links a:hover,
.cv-contact a:hover,
.cv-contact .contact-email:hover {
  text-decoration: underline;
}

.page-body > .links:last-child,
.post-body > .links:last-child {
  margin-top: 2.5rem;
}

/* "Contact me" reveals the email address (js/contact.js), so it is a button
   styled to match the links around it. */
.contact-email {
  font: inherit;
  letter-spacing: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-color: var(--ink-3);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.contact-email:hover {
  color: var(--accent);
  text-decoration-color: currentColor;
}

/* CV (templates/cv.html, data/cv.toml, js/cv.js) */

.cv {
  position: relative;
}

.cv-header h1 {
  font-size: 2.75rem;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.cv-headline {
  font-size: 1.25rem;
  line-height: 1.4;
  color: var(--ink-2);
}

/* Full width: justified, its right edge must meet the rule and text below. */
.cv-lede {
  margin-top: 1.25rem;
  font-size: 1.125rem;
}

.cv-contact {
  margin-top: 1rem;
}

/* Each section opens with a rule so the long page reads as chapters. */
.cv-section {
  margin-top: 3rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--rule);
  scroll-margin-top: 0.5rem;
}

.cv-section > h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
}

.cv-entry + .cv-entry {
  margin-top: 1.5rem;
}

.cv-citations .cv-entry + .cv-entry {
  margin-top: 1.1rem;
}

.cv-head {
  display: flex;
  flex-direction: column;
}

.cv-head + .cv-head {
  margin-top: 0.15rem;
}

.cv-head h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
}

/* Works (papers, patents, talks) in regular weight; roles and degrees bold. */
.cv-citations .cv-head h3 {
  font-weight: 400;
}

.cv-head h3 a {
  text-decoration-color: color-mix(in srgb, currentColor 25%, transparent);
}

.cv-head h3 a:hover {
  text-decoration-color: currentColor;
}

.cv-date {
  flex-shrink: 0;
  font-family: var(--sans);
  font-size: 0.8125rem;
  letter-spacing: normal;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.cv-meta {
  color: var(--ink-2);
}

/* Co-authors and venue each get a line. */
.cv-with,
.cv-venue {
  display: block;
}

.cv-meta,
.cv-note,
.cv-entry li {
  font-size: 1rem;
  line-height: 1.6;
}

/* In lists of works the description is supporting detail; keep titles forward. */
.cv-citations .cv-note {
  color: var(--ink-2);
}

.cv-note {
  margin-top: 0.15rem;
}

.cv-links {
  margin-top: 0.15rem;
}

.cv-entry ul {
  list-style: none;
  margin-top: 0.5rem;
}

.cv-entry li {
  position: relative;
  padding-left: 1.1rem;
}

.cv-entry li + li {
  margin-top: 0.3rem;
}

.cv-entry li::before {
  content: "";
  position: absolute;
  left: 0.1rem;
  top: 0.8em;
  width: 0.45rem;
  height: 1px;
  background: var(--ink-3);
}

.cv-compact {
  display: grid;
  grid-template-columns: 8rem 1fr;
  align-items: baseline;
  gap: 0.6rem 1.5rem;
}

.cv-compact dt {
  font-family: var(--sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: normal;
  color: var(--ink-2);
}

/* Timeline. From tablet width up, CV entries are a two-column grid: years
   in a left column, right-aligned against a rule that runs down each
   section with a dot at each date, and everything else in the text column.
   Narrower screens keep one column with each date above its title. */
@media (min-width: 46rem) {
  .cv-entry {
    position: relative;
    display: grid;
    grid-template-columns: var(--gutter) minmax(0, 1fr);
    column-gap: var(--gap);
    align-items: baseline;
  }

  .cv-head {
    display: contents;
  }

  .cv-entry > :not(.cv-head),
  .cv-head h3 {
    grid-column: 2;
  }

  /* Every date gets the width of "2018-2022" and starts at the same point,
     so start years, end years, and single years each line up in a column. */
  .cv-date {
    grid-column: 1;
    justify-self: end;
    position: relative;
    min-width: 9ch;
    white-space: nowrap;
  }

  /* A year already labelled above keeps only its dot. */
  .cv-date--repeat {
    color: transparent;
  }

  /* Padding, not margin, separates entries so the rule runs unbroken. */
  .cv-entry + .cv-entry,
  .cv-citations .cv-entry + .cv-entry {
    margin-top: 0;
    padding-top: 1.5rem;
  }

  .cv-citations .cv-entry + .cv-entry {
    padding-top: 1.1rem;
  }

  .cv-entry::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(var(--gutter) + var(--gap) / 2 - 0.5px);
    width: 1px;
    background: var(--rule);
  }

  .cv-entry:first-of-type::before {
    top: 0.75rem;
  }

  .cv-date::before {
    content: "";
    position: absolute;
    right: calc(var(--gap) / -2 - 3.5px);
    top: calc(0.5lh - 3.5px);
    width: 7px;
    height: 7px;
    border: 1.5px solid var(--accent);
    border-radius: 50%;
    background: var(--paper);
  }

  /* Technologies: labels sit in the date column. */
  .cv-compact {
    grid-template-columns: var(--gutter) minmax(0, 1fr);
    column-gap: var(--gap);
  }

  .cv-compact dt {
    text-align: right;
  }

  .cv-section > p {
    margin-left: calc(var(--gutter) + var(--gap));
  }
}

/* Contents panel. In the left margin on wide screens, a slide-in panel on
   narrow ones (with JS), and a plain list under the header without JS. */

.cv-rail {
  margin-top: 2.5rem;
  font-family: var(--sans);
  letter-spacing: normal;
}

.cv-rail-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.cv-toc {
  list-style: none;
}

.cv-toc a {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.3rem 0 0.3rem 1rem;
  font-size: 0.875rem;
  line-height: 1.35;
  color: var(--ink-2);
  text-decoration: none;
}

/* Rail segment: a track, and a fill scaled by reading progress (--p). */
.cv-toc a::before,
.cv-toc a::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--rule);
}

.cv-toc a::after {
  background: var(--accent);
  transform-origin: top;
  transform: scaleY(var(--p, 0));
}

.cv-toc a:hover {
  color: var(--ink);
}

.cv-toc a.is-active,
.cv-toc a.is-active .cv-toc-count {
  color: var(--accent);
}

.cv-toc-count {
  font-size: 0.75rem;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

.cv-toc-toggle,
.cv-backdrop {
  display: none;
}

@media (min-width: 75rem) {
  .cv-rail {
    position: absolute;
    top: 0;
    bottom: 0;
    right: calc(100% + 2rem);
    width: 11rem;
    margin-top: 0;
  }

  .cv-rail-title {
    display: none;
  }

  .cv-toc {
    position: sticky;
    top: 2rem;
  }
}

@media (max-width: 74.99rem) {
  .js .cv-rail {
    position: fixed;
    z-index: 20;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(19rem, 86vw);
    margin: 0;
    padding: 1.5rem 1.5rem 2rem;
    overflow-y: auto;
    background: var(--paper);
    border-left: 1px solid var(--rule);
    box-shadow: -12px 0 32px rgb(0 0 0 / 0.12);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.25s ease, visibility 0s linear 0.25s;
  }

  .js .cv-rail.is-open {
    transform: none;
    visibility: visible;
    transition: transform 0.25s ease;
  }

  .js .cv-toc a {
    padding-top: 0.45rem;
    padding-bottom: 0.45rem;
    font-size: 0.9375rem;
  }

  .js .cv-toc-toggle {
    position: fixed;
    z-index: 10;
    right: 1rem;
    bottom: 1rem;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    max-width: calc(100vw - 2rem);
    padding: 0.6rem 1rem 0.7rem;
    overflow: hidden;
    border: none;
    border-radius: 999px;
    font: 600 0.875rem/1.2 var(--sans);
    color: var(--paper);
    background: var(--ink);
    box-shadow: 0 4px 16px rgb(0 0 0 / 0.18);
    cursor: pointer;
  }

  .cv-toc-toggle-current {
    font-weight: 400;
    opacity: 0.75;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .cv-toc-toggle-current:empty {
    display: none;
  }

  /* Overall reading progress along the bottom edge of the button. */
  .cv-toc-toggle::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 3px;
    background: var(--accent);
    transform-origin: left;
    transform: scaleX(var(--progress, 0));
  }

  .js .cv-backdrop {
    display: block;
    position: fixed;
    z-index: 15;
    inset: 0;
    background: rgb(0 0 0 / 0.3);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
  }

  .js .cv-backdrop.is-open {
    opacity: 1;
    pointer-events: auto;
  }
}

/* Justified paragraphs with hyphenation. The CV lede is included; page
   templates can include theirs with page-body--justified. Other ledes and narrow screens
   keep a ragged right edge. Citations stay ragged too: titles and DOIs are
   long unbreakable runs that open wide gaps when justified. */
@media (min-width: 36rem) {
  .page-body p:not(:first-child, :has(cite), .links),
  .page-body--justified p:not(:has(cite), .links),
  .post-body p:not(:has(cite), .links),
  .cv-lede,
  .cv-note,
  .cv-entry li {
    text-align: justify;
    -webkit-hyphens: auto;
    hyphens: auto;
    hyphenate-limit-chars: 6 3 2;
    text-wrap: pretty;
  }
}

@media (max-width: 36rem) {
  .cv-header h1 {
    font-size: 2.125rem;
  }

  .cv-head {
    flex-direction: column;
    gap: 0;
  }

  .cv-date {
    white-space: normal;
  }

  .cv-compact {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .cv-compact dd {
    margin-bottom: 0.6rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  html:has(.cv) {
    scroll-behavior: smooth;
  }
}

@media (prefers-reduced-motion: reduce) {
  .js .cv-rail,
  .js .cv-rail.is-open,
  .js .cv-backdrop {
    transition: none;
  }
}

@media print {
  body {
    max-width: none;
    padding: 0;
    font-size: 10pt;
    color: #000;
    background: none;
  }

  .site-nav,
  footer,
  .cv-rail,
  .cv-toc-toggle,
  .cv-backdrop {
    display: none !important;
  }

  .cv a {
    color: inherit;
    text-decoration: none;
  }

  .cv-section {
    margin-top: 1.5rem;
  }

  .cv-entry {
    break-inside: avoid;
  }
}