:root {
  --bg-color: #ffffff;
  --text-color: #111111;
  --muted-text: #555555;
  --accent: #6a3fb3;
  --border-color: #dddddd;
  --max-width: 960px;
  --heading-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --body-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* Basic reset and typography */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--body-font);
  font-size: 16px;
  line-height: 1.5;
}

/* Global link styles */

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

/* Skip link */

.skip-link {
  position: absolute;
  top: -40px;
  left: 1rem;
  z-index: 1000;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 4px;
  background-color: #ffffff;
  color: var(--accent);
  font-size: 0.9rem;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Layout helpers */

.section {
  padding: 3rem 1rem;
}

.section-inner,
.header-inner,
.footer-inner,
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Header */

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
}

.site-branding {
  display: flex;
  flex-direction: column;
}

.site-title {
  color: var(--accent);
  font-family: var(--heading-font);
  font-size: 1.2rem;
  font-weight: 600;
}

.site-title:hover,
.site-title:focus {
  text-decoration: underline;
}

.site-subtitle {
  margin: 0.25rem 0 0;
  color: var(--muted-text);
  font-size: 0.78rem;
}

.main-nav ul {
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.main-nav ul li a {
  font-weight: 600;
}

.main-nav a {
  font-size: 0.95rem;
}

/* Hero */

.hero {
  padding: 3rem 1rem 2rem;
  border-bottom: 1px solid var(--border-color);
}

.hero-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
}

.hero-content {
  flex: 1 1 280px;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 1.5rem;
  border-radius: 0.75rem;
  background-color: #f8f3ff;
}

.hero-icon {
  display: block;
  width: 100px;
  height: 268px;
}

.image-credit {
  max-width: 240px;
  box-sizing: border-box;
  margin-top: 0.8rem;
  padding: 0 5px;
  overflow-wrap: break-word;
  font-size: 0.7em;
  line-height: 1.4;
  text-align: left;
  word-wrap: break-word;
}

.hero-network {
  width: 200px;
  height: 120px;
}

.hero-network circle {
  fill: var(--accent);
}

.hero-network line {
  stroke: var(--accent);
  stroke-width: 1;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--heading-font);
  font-size: 1.6rem;
}

.hero-core {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.hero-support {
  margin: 0 0 1rem;
}

/* Buttons */

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

.btn-primary {
  border-color: var(--accent);
  background-color: var(--accent);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus {
  border-color: #4f2a8a;
  background-color: #4f2a8a;
}

.btn-secondary {
  border-color: var(--accent);
  background-color: transparent;
  color: var(--accent);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: #f5f0ff;
}

/* Headings and paragraphs */

h1,
h2,
h3,
h4 {
  font-family: var(--heading-font);
}

h1 {
  margin: 0 0 1rem;
  font-size: 1.8rem;
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.4rem;
}

p + h2 {
  margin-top: 1.5rem;
}

ul + h2,
ol + h2 {
  margin-top: 1.5rem;
}

h3 + h2,
.card + h2,
.module-section + h2 {
  margin-top: 2rem;
}

h3 {
  margin: 2rem 0 0.5rem;
  font-size: 1.2rem;
}

h4 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

p {
  margin: 0 0 1rem;
}

/* Lists */

ul,
ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.6rem;
}

li:last-child {
  margin-bottom: 0;
}

.bullet-list {
  list-style: disc;
}

/* Grid and cards */

.grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(260px, 1fr));
}

.card {
  position: relative;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: #fafafa;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.card-link {
  display: block;
  min-height: 100%;
  padding: 1rem;
  color: inherit;
  text-decoration: none;
}

.card-link h3 {
  margin-top: 0;
  padding-right: 4.5rem;
  color: var(--accent);
}

.card h3 a {
  color: var(--accent);
  text-decoration: none;
}

.card h3 a:hover,
.card h3 a:focus {
  text-decoration: none;
}

.card h3 a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.card-link p {
  margin-bottom: 0;
}

.card:hover,
.card:focus-within {
  border-color: var(--accent);
  background-color: #f5f0ff;
}

.card:has(.card-link:hover),
.card:has(.card-link:focus-visible) {
  border-color: var(--accent);
}

.card-link:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
}

.card .card-icon {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 60px;
  height: 60px;
  object-fit: contain;
}

.card-links {
  margin: 0.5rem 0 0;
}

.card-links a {
  color: var(--accent);
}

.card-links a:hover,
.card-links a:focus {
  text-decoration: underline;
}

.divider {
  margin: 0 0.25rem;
  color: var(--muted-text);
}

.grid-card {
  position: relative;
  padding: 1.5rem;
}

.grid-card .card-icon {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.grid + h2 {
  margin-top: 2.5rem;
}

/* Contact form */

.contact-form {
  max-width: 600px;
  margin-top: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  margin-bottom: 1rem;
}

.form-field label {
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.required-indicator {
  margin-left: 0.25rem;
  color: var(--accent);
}

.form-field input,
.form-field textarea {
  padding: 0.4rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: var(--body-font);
  font-size: 0.95rem;
}

.form-field input:focus,
.form-field textarea:focus,
.btn:focus,
.main-nav a:focus,
.site-title:focus,
.skip-link:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.form-status {
  margin: 0.5rem 0 1rem;
  color: var(--muted-text);
  font-size: 0.95rem;
}

/* Connect page */

.contact-page .hero {
  display: flex;
  justify-content: center;
}

.contact-page .hero-inner {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
}

.contact-page .hero-content {
  flex: 1 1 0;
}

.contact-page .hero-visual {
  flex: 0 0 auto;
  margin-top: 3rem;
}

.contact-hero-envelope {
  display: block;
  width: 100%;
  max-width: 260px;
  height: auto;
}

/* Article callouts */

.aside-callout {
  margin: 1.25rem 0 1.25rem 20px;
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--accent);
  background-color: #ffffff;
}

.aside-callout p {
  margin: 0;
  font-style: italic;
}

/* Article pages */

.article-page #main-content {
  padding-block: 0;
}

.article-page .article-content {
  width: min(100% - 2rem, 48rem);
  margin-inline: auto;
}

.article-content ol {
  margin-inline: 0;
  padding-inline-start: 1.5rem;
}

.article-content li + li {
  margin-top: 1rem;
}

.article-page .article-content section {
  margin-block: 2rem;
}

.article-page .article-content p {
  margin-block: 0 1rem;
}

.article-page .article-content h2 {
  margin: 2.5rem 0 0.75rem;
}

.article-page .section {
  padding-top: 2.5rem;
}

.article-page .section-inner {
  padding-top: 0;
}

.article-page .article-header {
  margin-top: 0;
  margin-bottom: 2rem;
  padding-top: 0;
}

.article-page .article-content aside {
  margin-block: 2rem;
  padding-block: 1rem;
}

/* Article taxonomy */

.article-taxonomy {
  margin: 0 0 1.5rem;
}

.article-taxonomy__label {
  font-weight: 700;
}

.article-taxonomy__list {
  display: inline;
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-taxonomy__list li {
  display: inline;
  margin: 0;
  padding: 0;
}

.article-taxonomy__list li:not(:last-child)::after {
  content: ", ";
}

.article-taxonomy__list a {
  color: #5d3b97;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
}

.article-taxonomy__list a:hover,
.article-taxonomy__list a:focus-visible {
  color: #3f256b;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

/* Site search bar */

.site-search {
  padding: 0.75rem 0 1rem;
  background-color: var(--page-bg, #f8f5ff);
}

.site-search-form {
  display: flex;
  flex-direction: column;
  max-width: 320px;
  gap: 0.5rem;
  margin-left: auto;
}

.site-search-label {
  font-size: 0.9rem;
  font-weight: 500;
  text-align: left;
}

.site-search-controls {
  display: flex;
  gap: 0.5rem;
}

.site-search-controls input[type="search"] {
  flex: 1 1 auto;
}

.site-search .site-search-button.btn.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: auto;
  min-height: auto;
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 4px;
  background-color: var(--accent);
  color: #ffffff;
  box-shadow: none;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

.site-search .site-search-button.btn.btn-primary:hover,
.site-search .site-search-button.btn.btn-primary:focus {
  border-color: #4f2a8a;
  background-color: #4f2a8a;
  color: #ffffff;
  text-decoration: none;
}

.site-search .site-search-button .site-search-icon img {
  display: block;
  width: 16px;
  height: 16px;
}

.search-results-section + .search-results-section {
  margin-top: 2rem;
}

.search-results-list {
  margin-top: 1rem;
  padding-left: 0;
  list-style: none;
}

.search-result + .search-result {
  margin-top: 1rem;
}

.search-result h3 {
  margin-bottom: 0.25rem;
  font-size: 1.05rem;
}

.search-result mark {
  padding: 0 0.1em;
  background-color: #fff4b3;
}

/* Footer */

.site-footer {
  padding: 1.5rem 1rem;
  border-top: 1px solid #cccccc;
  background-color: #f5f5f5;
  font-size: 0.78rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-inner p {
  margin: 0.25rem 0;
}

.site-footer a,
.footer-links a {
  color: var(--accent);
}

.site-footer a:hover,
.site-footer a:focus,
.footer-links a:hover,
.footer-links a:focus {
  text-decoration: underline;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  margin-top: 0.5rem;
}

/* About page */

.about-main {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
}

.about-main-text {
  flex: 1 1 0;
}

.about-main .hero-visual {
  flex: 0 0 260px;
  margin: 0;
}

.about-main .hero-icon {
  display: block;
  width: 150px;
  height: 268px;
}

.about-main .image-credit {
  margin-top: 0.8rem;
  font-size: 0.7em;
  line-height: 1.4;
  text-align: center;
}

/* Approach page */

.approach-main {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
}

.approach-main-text {
  flex: 1 1 0;
}

.approach-main .hero-visual {
  flex: 0 0 260px;
  margin: 0;
}

.approach-main .hero-icon {
  display: block;
  width: 221px;
  height: 268px;
}

.approach-main .image-credit {
  margin-top: 0.8rem;
  font-size: 0.7em;
  line-height: 1.4;
  text-align: center;
}

/* Portfolio page */

.portfolio-why {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
}

.portfolio-why-text {
  flex: 1 1 0;
}

.portfolio-why .hero-visual {
  flex: 0 0 260px;
  margin: 3.8rem 0 0;
}

.portfolio-why .hero-icon {
  display: block;
  width: 100%;
  height: auto;
}

.portfolio-why .image-credit {
  margin-top: 0.8rem;
  font-size: 0.7em;
  line-height: 1.4;
  text-align: left;
}

/* Publications */

.pubs-section {
  margin-top: 1rem;
}

#pubs-heading {
  margin-top: 1rem;
}

.pub-list {
  margin-top: 1rem;
  padding-left: 0;
  list-style: none;
}

.pub-list li {
  margin-bottom: 0.45rem;
}

.pub-list a {
  color: var(--accent);
}

.pub-list a:hover,
.pub-list a:focus {
  text-decoration: underline;
}

/* Responsive layout */

@media (max-width: 800px) {
  .portfolio-why {
    flex-direction: column;
  }

  .portfolio-why .hero-visual {
    align-self: flex-start;
    margin-top: 1rem;
  }
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .hero-inner {
    flex-direction: column;
  }

  .hero-content {
    flex: 1 1 auto;
  }

  .hero-visual {
    justify-content: flex-start;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .site-search-form {
    max-width: 100%;
    margin-left: 0;
  }

  .site-search-controls {
    flex-direction: column;
    align-items: stretch;
  }
}