/*
 * Quiet research notebook.
 * Editorial typography, restrained interaction, and content-first layouts.
 */

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/lattice/ibm-plex-mono-400-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/lattice/ibm-plex-mono-500-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url('../fonts/lattice/inter-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url('../fonts/lattice/source-serif-4-latin.woff2') format('woff2');
}

:root {
  color-scheme: light;
  --paper: #f7f4ed;
  --paper-deep: #eee8dc;
  --ink: #22201d;
  --ink-soft: #575149;
  --ink-faint: #837b71;
  --rule: #d8d0c3;
  --accent: #4e6c89;
  --accent-ink: #34536f;
  --accent-soft: #dfe6ed;
  --accent-wash: rgba(78, 108, 137, 0.055);
  --serif: 'Source Serif 4', Iowan Old Style, Palatino, Georgia, serif;
  --sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Consolas, monospace;
}
:root[data-theme='dark'] {
  color-scheme: dark;
  --paper: #1b1a18;
  --paper-deep: #24221f;
  --ink: #eee9df;
  --ink-soft: #c3bbb0;
  --ink-faint: #918a81;
  --rule: #3c3934;
  --accent: #91abc3;
  --accent-ink: #b8cade;
  --accent-soft: #293541;
  --accent-wash: rgba(145, 171, 195, 0.055);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-padding-top: 1.5rem;
}

body {
  margin: 0;
  background:
    linear-gradient(to bottom, var(--accent-wash), transparent 17rem),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea,
select {
  font: inherit;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

::selection {
  background: var(--accent-soft);
}

.notebook {
  min-height: 100vh;
}

/* Header */

.site-header {
  border-bottom: 1px solid var(--rule);
}

.site-header-inner {
  width: min(1120px, calc(100% - 80px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-name {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  text-decoration: none;
}

.site-navigation {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.site-navigation a {
  color: var(--ink-soft);
  font-size: 0.87rem;
  text-decoration: none;
}

.site-navigation a:hover {
  color: var(--ink);
}

.theme-toggle,
.menu-toggle,
.bibtex-copy {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}

.theme-toggle,
.menu-toggle {
  display: none;
}

.js .theme-toggle {
  display: block;
}

.theme-toggle {
  width: 2rem;
  height: 2rem;
  padding: 0;
  border-radius: 50%;
  font-size: 1rem;
}

.theme-toggle:hover {
  background: var(--paper-deep);
  color: var(--ink);
}

.menu-toggle {
  padding: 0.35rem 0;
  font-size: 0.87rem;
}

/* Shared page frame */

.site-main {
  width: min(1120px, calc(100% - 80px));
  margin: 0 auto;
}

.home-intro {
  padding: 6rem 0 5rem;
  display: grid;
  grid-template-columns: 210px minmax(0, 680px);
  gap: 4.5rem;
  align-items: start;
}

.portrait {
  margin: 0;
}

.portrait img {
  width: 190px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center;
  box-shadow: 9px 9px 0 var(--accent-soft);
}

.portrait figcaption {
  margin-top: 0.65rem;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.intro-kicker,
.page-kicker,
.paper-meta,
.paper-entry-meta,
.media-list time {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.01em;
}

.intro-kicker {
  margin: 0 0 1rem;
  color: var(--accent-ink);
}

.intro-copy h1 {
  margin: 0 0 1.4rem;
  font-family: var(--serif);
  font-size: clamp(3.4rem, 7vw, 5.4rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.96;
}

.intro-bio {
  max-width: 640px;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.25rem;
  line-height: 1.58;
}

.intro-bio p {
  margin: 0;
}

.intro-bio em {
  color: var(--ink);
  font-style: italic;
  background: linear-gradient(transparent 68%, var(--accent-soft) 68%);
}

.intro-detail {
  max-width: 650px;
  margin: 1.4rem 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.intro-links,
.paper-entry-links,
.paper-links,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.25rem;
}

.intro-links {
  margin-top: 1.8rem;
}

.intro-links a,
.paper-entry-links a,
.paper-links a,
.footer-links a {
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 500;
  text-decoration: none;
}

.intro-links a:hover,
.paper-entry-links a:hover,
.paper-links a:hover,
.footer-links a:hover {
  text-decoration: underline;
}

/* Home sections */

.notebook-section {
  padding: 5rem 0;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 4.5rem;
}

.section-heading h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.section-heading h2::after {
  content: '';
  display: block;
  width: 1.75rem;
  height: 2px;
  margin-top: 0.7rem;
  background: var(--accent);
  opacity: 0.72;
}

.section-heading p {
  margin: 0.8rem 0 0;
  color: var(--ink-faint);
  font-size: 0.83rem;
  line-height: 1.55;
}

.selected-work {
  min-width: 0;
}

.paper-entry {
  padding: 0 0 2.6rem;
  border-bottom: 1px solid var(--rule);
}

.paper-entry + .paper-entry {
  padding-top: 2.6rem;
}

.paper-entry:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.paper-entry-meta {
  margin: 0 0 0.65rem;
  color: var(--accent-ink);
}

.paper-entry h3 {
  max-width: 760px;
  margin: 0;
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.paper-entry h3 a {
  text-decoration: none;
}

.paper-entry-authors {
  margin: 0.8rem 0 0;
  color: var(--ink-faint);
  font-size: 0.78rem;
  line-height: 1.55;
}

.paper-entry-authors strong,
.paper-authors strong {
  color: var(--ink);
  font-weight: 600;
  background: linear-gradient(transparent 68%, var(--accent-soft) 68%);
}

.paper-entry-summary {
  max-width: 690px;
  margin: 1.1rem 0 0;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.6;
}

.paper-entry-links {
  margin-top: 1.15rem;
}

.paper-entry-figure {
  margin: 1.2rem 0 0;
}

.paper-entry-figure img {
  max-height: 310px;
  width: auto;
  border: 1px solid var(--rule);
}

.research-threads {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.2rem;
}

.research-threads article {
  padding-top: 1rem;
  border-top: 2px solid color-mix(in srgb, var(--accent) 45%, var(--rule));
}

.research-threads h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.22rem;
  font-weight: 600;
  line-height: 1.25;
}

.research-threads p {
  margin: 0.75rem 0 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.publication-archive {
  row-gap: 0;
}

.publication-archive .section-heading {
  grid-row: 1 / span 50;
}

.publication-year {
  grid-column: 2;
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--rule);
}

.publication-year:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.publication-year h3 {
  margin: 0.15rem 0 0;
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 400;
}

.publication-year ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.publication-year li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(100px, 140px);
  gap: 1rem;
  align-items: start;
}

.publication-year li + li {
  margin-top: 0.8rem;
}

.publication-year a {
  font-family: var(--serif);
  font-size: 1rem;
  line-height: 1.35;
  text-decoration: none;
}

.publication-authors {
  margin: 0.35rem 0 0;
  color: var(--ink-faint);
  font-size: 0.72rem;
  line-height: 1.55;
}

.publication-authors strong {
  color: var(--ink);
  font-weight: 600;
}

.publication-venue {
  padding-top: 0.22rem;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-align: right;
}

.media-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.media-list li {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--rule);
}

.media-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.media-list time {
  margin-top: 0.15rem;
  color: var(--accent-ink);
}

.media-list a {
  font-family: var(--serif);
  font-size: 1.13rem;
  font-weight: 500;
  text-decoration: none;
}

.media-list p {
  margin: 0.2rem 0 0;
  color: var(--ink-faint);
  font-size: 0.78rem;
}

.media-list .media-description {
  max-width: 620px;
  margin-top: 0.55rem;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 0.92rem;
}

/* Footer */

.site-footer {
  width: min(1120px, calc(100% - 80px));
  margin: 0 auto;
  padding: 3.5rem 0 2.5rem;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem 3rem;
}

.footer-intro p {
  margin: 0;
  font-family: var(--serif);
}

.footer-intro p + p {
  margin-top: 0.15rem;
  color: var(--ink-faint);
  font-family: var(--sans);
  font-size: 0.78rem;
}

.footer-links {
  align-content: start;
  justify-content: flex-end;
}

.footer-note {
  grid-column: 1 / -1;
  margin: 1rem 0 0;
  color: var(--ink-faint);
  font-size: 0.72rem;
}

/* Publication page */

.paper-page,
.reading-page,
.not-found {
  padding: 4.5rem 0 6rem;
}

.back-link {
  color: var(--ink-faint);
  font-size: 0.8rem;
  text-decoration: none;
}

.paper-header {
  max-width: 900px;
  margin-top: 4rem;
}

.paper-meta {
  margin: 0 0 1rem;
  color: var(--accent-ink);
}

.paper-header h1,
.page-header h1,
.not-found h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.paper-header h1 {
  font-size: clamp(2.8rem, 6vw, 4.9rem);
  line-height: 1.02;
}

.paper-authors {
  max-width: 760px;
  margin: 1.5rem 0 0;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.65;
}

.paper-links {
  margin-top: 1.8rem;
}

.paper-figure {
  max-width: 900px;
  margin: 3.5rem 0 0;
}

.paper-figure img {
  width: 100%;
  border: 1px solid var(--rule);
}

.paper-figure figcaption {
  margin-top: 0.6rem;
  color: var(--ink-faint);
  font-size: 0.76rem;
}

.paper-layout {
  margin-top: 5rem;
  padding-top: 4rem;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: minmax(0, 720px) 260px;
  gap: 6rem;
  align-items: start;
}

.paper-reading section + section {
  margin-top: 4rem;
}

.paper-reading h2,
.paper-details h2,
.related-work h2 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 600;
}

.paper-reading > section > p {
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.06rem;
  line-height: 1.75;
}

.paper-reading .paper-brief {
  padding-left: 1.25rem;
  border-left: 2px solid var(--accent);
}

.paper-media ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.paper-media li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.25rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--rule);
}

.paper-media a {
  font-family: var(--serif);
  text-decoration: none;
}

.paper-media span {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-align: right;
}

.paper-details {
  padding-top: 0.15rem;
}

.paper-details h2 {
  font-size: 1.05rem;
}

.paper-details dl {
  margin: 0;
}

.paper-details dl div {
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule);
}

.paper-details dt {
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.67rem;
}

.paper-details dd {
  margin: 0.25rem 0 0;
  color: var(--ink-soft);
  font-size: 0.8rem;
  line-height: 1.5;
}

.citation-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.bibtex-copy {
  padding: 0;
  color: var(--accent);
  font-size: 0.76rem;
}

.bibtex-copy:hover {
  text-decoration: underline;
}

.bibtex {
  overflow-x: auto;
  padding: 1.25rem;
  border: 1px solid var(--rule);
  background: var(--paper-deep);
}

.bibtex pre {
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.7;
  white-space: pre;
}

.bibtex pre span {
  color: var(--accent);
}

.related-work {
  padding: 4rem 0 6rem 280px;
  border-top: 1px solid var(--rule);
}

.related-work ul {
  max-width: 760px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.related-work li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule);
}

.related-work a {
  font-family: var(--serif);
  text-decoration: none;
}

.related-work span {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.68rem;
}

/* Generic content */

.reading-page {
  max-width: 760px;
  margin: 0 auto;
}

.page-header {
  margin: 3rem 0;
}

.page-kicker {
  margin: 0 0 0.75rem;
  text-transform: capitalize;
}

.page-header h1,
.not-found h1 {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  line-height: 1.03;
}

.page-header > p:last-child {
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.1rem;
}

.prose {
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.75;
}

.prose h2,
.prose h3,
.prose h4 {
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.2;
}

.prose h2 {
  margin: 2.8rem 0 1rem;
  font-size: 1.65rem;
}

.prose h3 {
  margin: 2.2rem 0 0.8rem;
  font-size: 1.3rem;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote {
  margin: 1.1rem 0;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.85em;
}

.prose pre {
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--rule);
  background: var(--paper-deep);
}

.prose blockquote {
  padding-left: 1.2rem;
  border-left: 2px solid var(--accent);
  color: var(--ink-faint);
}

.page-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-list li {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr);
  gap: 1.25rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule);
}

.page-list time {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.page-list a {
  font-family: var(--serif);
  text-decoration: none;
}

.not-found {
  max-width: 720px;
}

.not-found > p:not(.page-kicker) {
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 1.1rem;
}

/* Responsive */

@media (max-width: 880px) {
  .site-header-inner,
  .site-main,
  .site-footer {
    width: min(100% - 48px, 720px);
  }

  .home-intro {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 2.5rem;
    padding: 4rem 0;
  }

  .portrait img {
    width: 150px;
  }

  .notebook-section {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 2.5rem;
  }

  .research-threads {
    grid-template-columns: 1fr;
  }

  .publication-archive .section-heading {
    grid-row: 1 / span 50;
  }

  .paper-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 3rem;
  }

  .paper-details {
    max-width: 520px;
  }

  .related-work {
    padding-left: 190px;
  }
}

@media (max-width: 680px) {
  .site-header-inner,
  .site-main,
  .site-footer {
    width: calc(100% - 40px);
  }

  .site-header-inner {
    min-height: 66px;
    position: relative;
  }

  .js .menu-toggle {
    display: block;
  }

  .site-navigation {
    width: 100%;
    padding-bottom: 1rem;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }

  .site-header-inner {
    flex-wrap: wrap;
  }

  .js .site-navigation {
    display: none;
    position: absolute;
    top: 66px;
    left: -20px;
    right: -20px;
    z-index: 10;
    padding: 1rem 20px 1.25rem;
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
  }

  .js .site-header.menu-open .site-navigation {
    display: flex;
  }

  .theme-toggle {
    width: auto;
    height: auto;
  }

  .home-intro {
    padding: 3.5rem 0;
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .portrait img {
    width: 145px;
  }

  .intro-copy h1 {
    font-size: clamp(3rem, 16vw, 4.2rem);
  }

  .intro-bio {
    font-size: 1.12rem;
  }

  .notebook-section {
    padding: 3.8rem 0;
    grid-template-columns: 1fr;
    gap: 2.2rem;
  }

  .section-heading {
    max-width: 360px;
  }

  .publication-archive .section-heading {
    grid-row: auto;
  }

  .publication-year {
    grid-column: 1;
  }

  .media-list li {
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 1rem;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .footer-note {
    grid-column: 1;
  }

  .paper-page,
  .reading-page,
  .not-found {
    padding: 3rem 0 4.5rem;
  }

  .paper-header {
    margin-top: 2.5rem;
  }

  .paper-header h1 {
    font-size: clamp(2.5rem, 12vw, 3.7rem);
  }

  .related-work {
    margin-left: 0;
    padding-left: 0;
  }

  .paper-layout {
    margin-top: 3.5rem;
    padding-top: 3rem;
  }

  .related-work {
    padding-top: 3rem;
  }

  .related-work li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .paper-media li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .paper-media span {
    text-align: left;
  }
}

@media (max-width: 430px) {
  .publication-year {
    grid-template-columns: 1fr;
    gap: 0.65rem;
  }

  .publication-year li {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .publication-venue {
    text-align: left;
  }

  .media-list li {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

  .paper-entry h3 {
    font-size: 1.5rem;
  }

  .bibtex {
    margin-right: -20px;
    border-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}