:root {
  --ink: #353535;
  --muted: #555;
  --soft: #979797;
  --line: #e5e5e5;
  --wash: #f9f9f9;
  --paper: #ffffff;
  --paper-2: #eaeaea;
  --accent: #4a9ae1;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.08);
  --mono: Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: "Helvetica Neue", "Segoe UI", Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

.mobile-nav-control {
  display: none;
  position: relative;
}

.nav-toggle-input {
  height: 1px;
  opacity: 0;
  pointer-events: none;
  position: absolute;
  width: 1px;
}

.mobile-menu-toggle {
  cursor: pointer;
  display: grid;
  gap: 6px;
  padding: 0.45rem;
}

.mobile-menu {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: none;
  list-style: none;
  margin: 0;
  min-width: 170px;
  padding: 0.5rem;
  position: absolute;
  right: 0;
  top: calc(100% + 0.55rem);
  z-index: 80;
}

.nav-toggle-input:checked ~ .mobile-menu {
  display: block;
}

.mobile-menu li {
  list-style: none;
}

.mobile-logo-menu {
  align-items: center;
  display: flex;
  justify-content: space-between;
  width: 100%;
}

.align {
  margin: 0;
  padding: 0;
}

.bar {
  background-color: var(--ink);
  display: block;
  height: 2px;
  width: 28px;
}

.icon {
  display: inline-block;
  flex: 0 0 auto;
  height: 1em;
  vertical-align: -0.13em;
  width: 1em;
}

.sr-only {
  clip: rect(0, 0, 0, 0);
  border: 0;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  color: var(--muted);
  background:
    linear-gradient(90deg, rgba(53, 53, 53, 0.035) 1px, transparent 1px),
    linear-gradient(0deg, rgba(53, 53, 53, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: 44px 44px;
}

main,
footer,
.nav-container {
  max-width: 1120px;
  width: min(88vw, 1120px);
}

main {
  padding: 1.2rem 0 3rem;
}

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

a:hover,
a:focus {
  color: var(--accent);
}

img {
  border-radius: 6px;
}

.nav {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
  box-shadow: none;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
}

.nav-shell {
  margin: 0 auto;
  padding: 1rem 0;
}

.brand-lockup {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  gap: 0.8rem;
}

.brand-lockup strong,
.brand-lockup small {
  display: block;
}

.brand-lockup strong {
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.98rem;
  letter-spacing: 0;
}

.brand-lockup small {
  color: var(--soft);
  font-family: var(--mono);
  font-size: 0.68rem;
  margin-top: 0.1rem;
  text-transform: uppercase;
}

.brand-mark,
.company-mark {
  align-items: center;
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 6px;
  color: var(--paper);
  display: inline-flex;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  justify-content: center;
  min-height: 42px;
  min-width: 42px;
}

.company-mark-vertical {
  align-self: stretch;
  font-size: 0.68rem;
  line-height: 1.1;
  min-height: 180px;
  min-width: 56px;
  overflow-wrap: anywhere;
  padding: 0.75rem 0.35rem;
  text-align: center;
  text-transform: uppercase;
  transform: rotate(180deg);
  white-space: normal;
  writing-mode: vertical-rl;
}

.nav .menu {
  align-items: center;
  display: flex;
  gap: 0.35rem;
  margin: 0;
}

.nav li {
  opacity: 1;
  padding: 0;
}

.nav a {
  border-radius: 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 0.55rem 0.75rem;
}

.nav a:hover {
  background: var(--wash);
  color: var(--ink);
}

.nav a.nav-cv,
.button-primary {
  background: var(--ink);
  border: 1px solid var(--ink);
  color: var(--paper);
}

.nav a.nav-cv:hover,
.button-primary:hover {
  background: transparent;
  color: var(--ink);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.button-primary,
.button-secondary {
  align-items: center;
  border-radius: 6px;
  display: inline-flex;
  font-family: var(--mono);
  font-size: 0.82rem;
  gap: 0.45rem;
  padding: 0.75rem 0.95rem;
}

.button-secondary {
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink);
}

.button-secondary:hover {
  border-color: var(--ink);
}

.page-shell {
  display: grid;
  gap: 3rem;
}

.page-header,
.hero {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 1rem;
  padding: 2.2rem 0 2rem;
}

.eyebrow {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hero-title,
.page-title {
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(2.2rem, 7vw, 5.4rem);
  font-weight: 800;
  letter-spacing: 0;
  line-height: 0.95;
  margin: 0;
  max-width: 950px;
}

.page-title {
  font-size: clamp(2rem, 5vw, 3.9rem);
}

.hero-copy,
.page-copy {
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 760px;
}

.hero-grid {
  align-items: stretch;
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
}

.profile-panel {
  align-self: stretch;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  padding: 0.8rem;
}

.profile-panel picture {
  display: block;
  height: 100%;
}

.profile-panel img {
  aspect-ratio: 4 / 5;
  filter: grayscale(100%);
  height: 100%;
  margin: 0;
  object-fit: cover;
  width: 100%;
}

.section-block {
  display: grid;
  gap: 1.3rem;
}

.section-heading {
  align-items: end;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  padding-bottom: 0.75rem;
}

.section-heading h2 {
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin: 0;
}

.section-heading span {
  color: var(--soft);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.bio-card,
.bio-block,
.research-card,
.project-card,
.skill-group,
.note-card,
.publication-card,
.catalogue-item,
.tags-item,
.error-panel {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.bio-block {
  padding: clamp(1.1rem, 3vw, 1.6rem);
}

.bio-block p {
  margin: 0 0 1rem;
}

.bio-block p:last-child {
  margin-bottom: 0;
}

.project-card:hover,
.research-card:hover,
.skill-group:hover,
.note-card:hover,
.publication-card:hover,
.catalogue-item:hover {
  border-color: var(--ink);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.career-timeline {
  display: grid;
  gap: 1rem;
  position: relative;
}

.career-item {
  display: grid;
  gap: 1rem;
  grid-template-columns: 56px minmax(0, 1fr);
}

.career-content {
  border-left: 2px solid var(--line);
  padding: 0 0 1rem 1rem;
}

.career-content h3,
.research-card h3,
.project-card h3,
.skill-group h3 {
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.15rem;
  margin: 0;
}

.meta-line {
  color: var(--soft);
  font-family: var(--mono);
  font-size: 0.78rem;
  margin: 0.25rem 0 0.75rem;
}

.pill-list,
.tag-list,
.tags-clouds,
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.post .tag-list {
  justify-content: center;
  margin: 1rem 0 1.4rem;
  text-align: center;
}

.pill,
.hovertag,
.post-tag {
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  display: inline-flex;
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.32rem 0.55rem;
}

.pill:hover,
.hovertag:hover,
.post-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.research-grid,
.skills-grid,
.projects-grid,
.notes-grid,
.publications-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.research-card,
.skill-group,
.note-card,
.publication-card {
  padding: 1.2rem;
}

.skill-group ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.skill-group li {
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.35rem 0.55rem;
}

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

.project-card {
  color: var(--muted);
  display: grid;
  overflow: hidden;
}

.project-card,
.research-card,
.skill-group,
.note-card,
.publication-card,
.catalogue-item,
.tags-item {
  content-visibility: auto;
  contain-intrinsic-size: 320px;
}

.project-media {
  aspect-ratio: 16 / 10;
  background: var(--wash);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.project-media img {
  filter: grayscale(100%);
  height: 100%;
  margin: 0;
  object-fit: cover;
  transition: filter 0.2s ease, transform 0.2s ease;
  width: 100%;
}

.project-card:hover .project-media img {
  filter: grayscale(20%);
  transform: scale(1.03);
}

.project-content {
  display: grid;
  gap: 0.75rem;
  padding: 1rem;
}

.project-category {
  align-items: center;
  color: var(--accent);
  display: inline-flex;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  gap: 0.35rem;
  text-transform: uppercase;
}

.project-link {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  font-family: var(--mono);
  font-size: 0.78rem;
  gap: 0.4rem;
}

.catalogue {
  display: grid;
  gap: 1rem;
}

.catalogue-item {
  border-bottom: 1px solid var(--line);
  padding: 1.2rem;
}

.catalogue-title {
  font-size: clamp(1.25rem, 3vw, 2rem);
}

.catalogue-line,
.post-line,
.tags-post-line,
.notfound-line {
  border-top-color: var(--ink);
}

.post,
.reading-shell {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(1.2rem, 4vw, 2.4rem);
}

.post-title {
  font-size: clamp(2rem, 6vw, 4.4rem);
  letter-spacing: 0;
}

.post-info,
.catalogue-time,
.catalogue-pinned,
.tags-post-meta {
  color: var(--soft);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.post p,
.post li {
  font-size: 1rem;
}

.tags {
  display: grid;
  gap: 1.4rem;
}

.tags-header {
  border-bottom: 1px solid var(--line);
  padding: 2rem 0 1rem;
}

.tags-header-title {
  color: var(--ink);
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin: 0;
}

.tags-header-line {
  border-top: 0.2rem solid var(--ink);
  margin-top: 0.5rem;
  width: 3rem;
}

.tags-item {
  padding: 1.1rem;
}

.tags-post {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0;
}

.tags-post-title {
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 700;
}

.footer-shell {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 1rem;
  padding-top: 1.4rem;
}

.footer-social {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: center;
}

.social {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  display: inline-flex;
  font-size: 1.3rem;
  height: 42px;
  justify-content: center;
  padding: 0;
  width: 42px;
}

.social:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.error-page {
  min-height: 56vh;
  place-items: center;
}

.error-panel {
  padding: clamp(1.5rem, 5vw, 3rem);
  text-align: center;
}

@media (max-width: 900px) {
  .hero-grid,
  .research-grid,
  .skills-grid,
  .projects-grid,
  .notes-grid,
  .publications-grid {
    grid-template-columns: 1fr;
  }

  .profile-panel {
    max-width: 280px;
  }

  .nav .menu {
    display: none;
  }

  .mobile-nav-control {
    display: block;
  }

  .mobile-menu li,
  .mobile-menu a {
    display: block;
    width: 100%;
  }
}

@media (max-width: 560px) {
  main,
  footer,
  .nav-container {
    width: min(92vw, 1120px);
  }

  .career-item {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .company-mark,
  .brand-mark {
    min-height: 38px;
    min-width: 38px;
  }

  .company-mark-vertical {
    font-size: 0.6rem;
    min-height: 150px;
    min-width: 44px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .tags-post {
    flex-direction: column;
  }
}

/* Mobile-first responsive hardening */
html,
body {
  max-width: 100%;
  overflow-x: clip;
}

*,
*::before,
*::after {
  min-width: 0;
}

p,
li,
h1,
h2,
h3,
.pill,
.post-tag,
.hovertag,
.tags-post-title,
.catalogue-title,
.project-category,
.meta-line {
  overflow-wrap: anywhere;
  word-break: normal;
}

main,
footer,
.nav-container {
  width: min(100% - 1.25rem, 1120px);
}

.nav-shell {
  padding: 0.75rem 0;
}

.brand-lockup {
  max-width: calc(100vw - 5.5rem);
}

.brand-lockup small {
  display: none;
}

.mobile-menu {
  max-height: calc(100vh - 5rem);
  overflow-y: auto;
}

.mobile-menu a,
.nav a {
  min-height: 42px;
}

.page-shell {
  gap: 2rem;
}

.page-header,
.hero {
  padding: 1.25rem 0 1.35rem;
}

.hero-title,
.page-title {
  font-size: clamp(2rem, 14vw, 3rem);
  line-height: 1;
}

.hero-copy,
.page-copy {
  font-size: 0.96rem;
}

.hero-grid,
.research-grid,
.skills-grid,
.projects-grid,
.notes-grid,
.publications-grid {
  grid-template-columns: minmax(0, 1fr);
}

.profile-panel {
  display: none;
  max-width: 220px;
}

.button-row {
  align-items: stretch;
  flex-direction: column;
  gap: 0.55rem;
}

.button-row .button-primary,
.button-row .button-secondary {
  justify-content: center;
  width: 100%;
}

.section-heading {
  align-items: flex-start;
  flex-direction: column;
  gap: 0.35rem;
}

.career-item {
  gap: 0.7rem;
  grid-template-columns: 36px minmax(0, 1fr);
}

.career-content {
  padding-left: 0.75rem;
}

.company-mark-vertical {
  font-size: 0.56rem;
  min-height: 130px;
  min-width: 36px;
  padding: 0.55rem 0.2rem;
}

.research-card,
.skill-group,
.note-card,
.publication-card,
.project-content,
.catalogue-item,
.tags-item,
.post,
.reading-shell,
.bio-block {
  padding: 0.95rem;
}

.project-card,
.research-card,
.skill-group,
.note-card,
.publication-card,
.catalogue-item,
.tags-item {
  contain-intrinsic-size: 240px;
}

.project-media {
  aspect-ratio: 4 / 3;
}

.tags-post {
  align-items: flex-start;
  flex-direction: column;
}

.tag-list,
.pill-list,
.tag-cloud,
.tags-clouds {
  align-items: flex-start;
}

.post-title {
  font-size: clamp(1.8rem, 12vw, 3rem);
  line-height: 1.05;
}

.post p,
.post li {
  font-size: 0.98rem;
}

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

.social {
  flex: 0 0 42px;
}

#button {
  bottom: 1rem;
  right: 1rem;
}

@media (max-width: 420px) {
  main,
  footer,
  .nav-container {
    width: min(100% - 1rem, 1120px);
  }

  .brand-mark {
    min-height: 36px;
    min-width: 36px;
  }

  .brand-lockup strong {
    font-size: 0.88rem;
  }

  .hero-title,
  .page-title {
    font-size: clamp(1.85rem, 13vw, 2.55rem);
  }

  .career-item {
    grid-template-columns: 32px minmax(0, 1fr);
  }

  .company-mark-vertical {
    font-size: 0.52rem;
    min-width: 32px;
  }
}

@media (min-width: 760px) {
  main,
  footer,
  .nav-container {
    width: min(88vw, 1120px);
  }

  .brand-lockup small {
    display: block;
  }

  .page-shell {
    gap: 3rem;
  }

  .page-header,
  .hero {
    padding: 2.2rem 0 2rem;
  }

  .hero-title,
  .page-title {
    font-size: clamp(2.2rem, 7vw, 5.4rem);
  }

  .page-title {
    font-size: clamp(2rem, 5vw, 3.9rem);
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  }

  .research-grid,
  .skills-grid,
  .notes-grid,
  .publications-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .profile-panel {
    display: block;
    max-width: none;
  }

  .button-row {
    align-items: center;
    flex-direction: row;
  }

  .button-row .button-primary,
  .button-row .button-secondary {
    width: auto;
  }

  .section-heading {
    align-items: end;
    flex-direction: row;
  }

  .career-item {
    grid-template-columns: 56px minmax(0, 1fr);
  }

  .company-mark-vertical {
    font-size: 0.68rem;
    min-height: 180px;
    min-width: 56px;
    padding: 0.75rem 0.35rem;
  }

  .research-card,
  .skill-group,
  .note-card,
  .publication-card,
  .catalogue-item,
  .tags-item {
    padding: 1.2rem;
  }

  .post,
  .reading-shell {
    padding: clamp(1.2rem, 4vw, 2.4rem);
  }

  .bio-block {
    padding: clamp(1.1rem, 3vw, 1.6rem);
  }

  .project-media {
    aspect-ratio: 16 / 10;
  }

  .tags-post {
    align-items: center;
    flex-direction: row;
  }

  .footer-social {
    justify-content: center;
  }

  .social {
    flex: 0 0 auto;
  }
}

@media (min-width: 1080px) {
  .projects-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}