:root {
  --accent-h: 353;
  --accent-s: 78%;
  --accent-l: 48%;
  --accent: hsl(var(--accent-h) var(--accent-s) var(--accent-l));
  --accent-soft: hsl(var(--accent-h) var(--accent-s) 96%);
  --accent-contrast: #fff;
  --bg: #fff;
  --bg-subtle: #f7f7f8;
  --surface: #fff;
  --border: #e6e6ea;
  --border-strong: #d4d4da;
  --text: #1a1a20;
  --text-muted: #5b5b66;
  --text-faint: #8a8a95;
  --shadow: 0 1px 2px #14141e0a, 0 4px 16px #14141e0f;
  --shadow-lg: 0 8px 40px #14141e1f;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: Newsreader, Georgia, "Times New Roman", serif;
  --radius: 10px;
  --radius-lg: 16px;
  --content-width: 68rem;
  --content-narrow: 46rem;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --accent-l: 62%;
  --accent-soft: hsl(var(--accent-h) 40% 16%);
  --bg: #0f1013;
  --bg-subtle: #16171b;
  --surface: #16171b;
  --border: #2a2c33;
  --border-strong: #3a3d46;
  --text: #ececef;
  --text-muted: #a6a7b0;
  --text-faint: #74757f;
  --shadow: 0 1px 2px #0000004d, 0 4px 16px #0006;
  --shadow-lg: 0 8px 40px #0000008c;
  color-scheme: dark;
}

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

* {
  margin: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

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

body.portfolio-body {
  font-family: var(--font-sans);
  font-size: clamp(0.95rem, 0.92rem + 0.2vw, 1.05rem);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.portfolio-body h1,
.portfolio-body h2,
.portfolio-body h3 {
  letter-spacing: -0.015em;
  color: var(--text);
  font-weight: 700;
  line-height: 1.2;
}

.portfolio-body a {
  color: var(--accent);
  text-underline-offset: 2px;
  text-decoration: none;
}

.portfolio-body a:hover {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -3rem;
  z-index: 200;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  padding: 0.5rem 0.85rem;
}

.skip-link:focus {
  top: 0.5rem;
}

.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.container-narrow {
  max-width: var(--content-narrow);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  isolation: isolate;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  min-height: 3.75rem;
  height: auto;
  padding-block: 0.35rem;
}

.portfolio-body a.brand {
  margin-right: auto;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.portfolio-body a.brand:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.1rem;
}

.portfolio-body a.nav-link {
  color: var(--text-muted);
  border-radius: var(--radius);
  padding: 0.35rem 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}

.portfolio-body a.nav-link:hover {
  color: var(--text);
  background: var(--bg-subtle);
  text-decoration: none;
}

.header-actions {
  display: flex;
  gap: 0.4rem;
}

.icon-btn {
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.icon-btn svg {
  width: 1.15rem;
  height: 1.15rem;
}

.icon-btn .moon {
  display: none;
}

:root[data-theme="dark"] .icon-btn .sun {
  display: none;
}

:root[data-theme="dark"] .icon-btn .moon {
  display: block;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 0.5rem 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav .nav-link {
  padding: 0.6rem 0.5rem;
  font-size: 1rem;
}

.section {
  padding-block: clamp(2.5rem, 5vw, 4rem);
  scroll-margin-top: 4.5rem;
}

.section + .section {
  padding-top: 0;
}

.section-head {
  margin-bottom: 1.5rem;
}

.section-head .rule {
  width: 2.5rem;
  height: 3px;
  margin-top: 0.6rem;
  border-radius: 999px;
  background: var(--accent);
}

.section-subtitle {
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.bio {
  padding-top: clamp(2rem, 4vw, 3.5rem);
}

.bio-grid {
  display: grid;
  grid-template-columns: 15rem 1fr;
  align-items: start;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.profile {
  position: sticky;
  top: 5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.avatar {
  width: 11rem;
  height: 11rem;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--surface);
  box-shadow: var(--shadow-lg);
}

.profile-name {
  margin-top: 1rem;
  font-size: 1.6rem;
}

.profile-role {
  color: var(--accent);
  margin-top: 0.15rem;
  font-weight: 600;
}

.profile-org {
  color: var(--text-muted);
  margin-top: 0.1rem;
  font-size: 0.9rem;
}

.profile-org a {
  color: var(--text-muted);
}

.profile-org a:hover {
  color: var(--accent);
}

.profile-social {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem 0.9rem;
  max-width: 12.5rem;
  margin-top: 1rem;
  font-size: 1.5rem;
}

.portfolio-body .profile-social a {
  color: var(--text-muted);
  transition: color 0.15s, transform 0.15s;
}

.portfolio-body .profile-social a:hover {
  color: var(--accent);
  text-decoration: none;
  transform: translateY(-2px);
}

.profile-social svg {
  width: 1.2rem;
  height: 1.2rem;
  display: block;
}

.prose {
  max-width: none;
  line-height: 1.75;
  font-family: var(--font-serif);
  font-size: 1.08rem;
}

.prose > * + * {
  margin-top: 1.05rem;
}

.prose h2 {
  font-family: var(--font-sans);
  font-size: 1.2rem;
}

.prose a {
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
}

.flag {
  display: inline-block;
  width: 1.15em;
  height: auto;
  vertical-align: -0.12em;
  margin-right: 0.4em;
  border-radius: 2px;
  box-shadow: 0 0 0 1px #00000014;
}

.detail-block {
  margin-top: 2rem;
}

.detail-title {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  font-size: 1.05rem;
}

.interests {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  display: inline-block;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0.2rem 0.55rem;
  font-size: 0.72rem;
  font-weight: 600;
}

.edu-list,
.updates-list {
  list-style: none;
  padding: 0;
}

.edu-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.edu-item {
  border-left: 2px solid var(--border);
  padding-left: 1rem;
}

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

.edu-area {
  font-weight: 600;
}

.edu-inst {
  margin-top: 0.1rem;
}

.edu-button {
  display: inline-block;
  color: var(--accent);
  margin-top: 0.35rem;
  font-weight: 600;
}

.small {
  font-size: 0.86rem;
}

.muted {
  color: var(--text-muted);
}

.faint {
  color: var(--text-faint);
}

.update {
  position: relative;
  border-left: 2px solid var(--border);
  padding: 0 0 1.5rem 1.75rem;
}

.update:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.update-marker {
  position: absolute;
  top: 0.35rem;
  left: -0.44rem;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
}

.update-title {
  margin-top: 0.2rem;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.4;
}

.update-title a {
  color: var(--text);
}

.update-title a:hover {
  color: var(--accent);
  text-decoration: none;
}

.update-summary {
  margin-top: 0.3rem;
}

.pub-grid,
.talk-grid,
.project-grid {
  display: grid;
  gap: 1rem;
}

.publications-list ol.bibliography {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1rem;
  margin: 0 0 2rem;
}

.publications-list h2.bibliography,
.publications-list h3.bibliography {
  font-size: 1.15rem;
  margin: 2rem 0 0.85rem;
  color: var(--text);
}

.publications-list li {
  list-style: none;
}

.talk-grid {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr));
}

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

.project-category {
  text-transform: capitalize;
  margin: 1.5rem 0 0.85rem;
  font-size: 1.05rem;
  color: var(--text-faint);
  font-weight: 500;
}

.project-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.project-card img {
  width: 100%;
  height: auto;
  display: block;
  background: var(--bg-subtle);
}

.project-body {
  padding: 1rem 1.1rem 1.15rem;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
}

.project-caption {
  margin-top: 0.3rem;
  font-size: 0.9rem;
}

@media (max-width: 767px) {
  .project-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.35rem;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.portfolio-body a.btn {
  color: var(--text);
}

.portfolio-body a.card {
  color: var(--text);
}

.card-link:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  text-decoration: none;
}

.pub-title {
  font-size: 1.05rem;
  line-height: 1.35;
}

.pub-title a {
  color: var(--text);
}

.pub-title a:hover {
  color: var(--accent);
  text-decoration: none;
}

.pub-authors {
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.pub-authors .owner {
  color: var(--text);
  font-weight: 600;
}

.pub-venue {
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.btn-sm {
  padding: 0.35rem 0.6rem;
  font-size: 0.78rem;
}

.see-all {
  margin-top: 1.5rem;
}

.talk-title {
  margin-top: 0.25rem;
  font-size: 1.05rem;
}

.talk-title a,
.project-card a {
  color: var(--text);
}

.talk-event {
  color: var(--text);
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
  margin-top: 3rem;
  padding-block: 2rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  text-align: center;
}

.footer-social {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.1rem;
  margin-bottom: 0.3rem;
}

.portfolio-body .footer-social a {
  color: var(--text-muted);
  font-size: 1.85rem;
  transition: color 0.15s, transform 0.15s;
}

.portfolio-body .footer-social a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.footer-social svg {
  width: 1.35rem;
  height: 1.35rem;
  display: block;
}

.footer-copy,
.footer-built {
  color: var(--text-faint);
}

@media (min-width: 701px) {
  .nav-toggle {
    display: none;
  }
}

@media (max-width: 700px) {
  .nav-links {
    display: none;
  }
}

@media (max-width: 800px) {
  .bio-grid {
    grid-template-columns: 1fr;
  }

  .profile {
    position: static;
  }
}

.post-article .section-head {
  margin-top: 0.75rem;
}

.post-body h2,
.post-body h3,
.post-body h4 {
  font-family: var(--font-sans);
  margin-top: 2rem;
}

.post-body h3 {
  font-size: 1.15rem;
}

.post-body ul,
.post-body ol {
  padding-left: 1.4rem;
}

.post-body li + li {
  margin-top: 0.3rem;
}

.post-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin-block: 1.5rem;
}

.post-body img,
.post-body .img-fluid {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  display: block;
}

.post-body blockquote {
  border-left: 3px solid var(--accent);
  color: var(--text-muted);
  padding-left: 1rem;
  font-style: italic;
}

.post-body code,
.post-body tt {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.1em 0.4em;
}

.post-body pre,
.post-body .highlight {
  overflow-x: auto;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  font-size: 0.86rem;
}

.post-body pre code,
.post-body .highlight code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
}

.post-body .row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1rem;
  margin-block: 1rem;
}

.post-body .highlight .c,
.post-body .highlight .c1,
.post-body .highlight .cm {
  color: var(--text-faint);
}

.post-body .highlight .k,
.post-body .highlight .kd {
  color: var(--accent);
}

.post-body .highlight .s,
.post-body .highlight .s1,
.post-body .highlight .s2 {
  color: #0a7f5a;
}

:root[data-theme="dark"] .post-body .highlight .s,
:root[data-theme="dark"] .post-body .highlight .s1,
:root[data-theme="dark"] .post-body .highlight .s2 {
  color: #7dcea0;
}