:root {
  --ink: #1b1b1b;
  --ink-strong: #0f0f0f;
  --ink-soft: #5a5a58;
  --paper: #fcfcfb;
  --paper-soft: #f0f0ee;
  --paper-warm: #f6f6f3;
  --line: #d2d2cf;
  --line-strong: #a9a9a5;
  --mint: #f27935;
  --mint-dark: #a64516;
  --blue: #a64516;
  --white: #ffffff;
  --max: 1180px;
  --gutter: clamp(1.1rem, 4vw, 3.5rem);
  --sans: "Avenir Next", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

[hidden] {
  display: none !important;
}

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

button {
  color: inherit;
  font: inherit;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  color: var(--ink-strong);
  background: var(--mint);
  font-weight: 700;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  min-height: 76px;
  padding: 0 var(--gutter);
  color: var(--white);
  background: rgba(17, 17, 17, 0.98);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: max-content;
}

.brand-mark {
  display: grid;
  width: 2.35rem;
  height: 2.35rem;
  place-items: center;
  color: var(--ink-strong);
  background: var(--mint);
  border-radius: 0.35rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 800;
}

.brand-copy {
  display: grid;
  line-height: 1.15;
}

.brand-copy strong {
  font-size: 0.9rem;
}

.brand-copy span {
  margin-top: 0.2rem;
  color: #bdbdb9;
  font-family: var(--mono);
  font-size: 0.61rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(0.85rem, 2vw, 1.7rem);
}

.main-nav > a {
  color: #d0d0cc;
  font-size: 0.8rem;
  font-weight: 650;
}

.main-nav > a:hover {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 0.35rem;
}

.main-nav .nav-contact {
  padding: 0.55rem 0.85rem;
  color: var(--ink-strong);
  background: var(--mint);
  border-radius: 0.3rem;
}

.main-nav .nav-contact:hover {
  color: var(--ink-strong);
  text-decoration: none;
  background: #ff9254;
}

.language-switch {
  display: flex;
  padding: 0.2rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 0.35rem;
}

.language-switch button {
  min-width: 2.25rem;
  min-height: 2rem;
  padding: 0.25rem 0.45rem;
  color: #bdbdb9;
  background: transparent;
  border: 0;
  border-radius: 0.2rem;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
}

.language-switch button[aria-pressed="true"] {
  color: var(--ink-strong);
  background: var(--white);
}

.menu-toggle {
  display: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.75fr);
  gap: clamp(2.5rem, 7vw, 7rem);
  align-items: center;
  min-height: 680px;
  padding: clamp(5.2rem, 9vw, 8.5rem) var(--gutter);
  color: var(--ink);
  background: var(--paper-warm);
  border-bottom: 1px solid var(--line);
}

.hero-main,
.role-card,
.section-heading,
.metric-grid,
.case-list,
.capability-grid,
.two-column-layout,
.credentials-details,
.repository-grid,
.profile-actions,
.publication-list,
.media-grid,
.profile-links {
  width: 100%;
  max-width: var(--max);
}

.hero-main {
  max-width: 710px;
  justify-self: end;
}

.eyebrow,
.section-kicker,
.card-label,
.case-type,
.case-index {
  margin: 0 0 1rem;
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow,
.hero .card-label {
  color: var(--mint-dark);
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(3rem, 6.6vw, 6.3rem);
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.hero h1 em {
  color: var(--mint);
  font-style: normal;
}

.hero-lead {
  max-width: 690px;
  margin: 1.8rem 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.02rem, 1.55vw, 1.25rem);
}

.hero-actions,
.profile-actions,
.inline-actions,
.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
}

.hero-actions {
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  padding: 0.72rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 0.3rem;
  font-size: 0.88rem;
  font-weight: 750;
}

.button-primary {
  color: var(--ink-strong);
  background: var(--mint);
}

.button-primary:hover,
.button-light:hover {
  background: #ff9254;
}

.button-secondary,
.button-outline-light {
  color: var(--ink);
  background: transparent;
  border-color: var(--line-strong);
}

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

.role-card {
  max-width: 440px;
  justify-self: start;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid var(--line-strong);
  background: #e9e9e6;
}

.role-card h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.role-card > p:not(.card-label) {
  margin: 0.8rem 0 0;
  color: var(--ink-soft);
}

.check-list {
  display: grid;
  gap: 0.7rem;
  padding: 1.3rem 0 1.3rem 1.3rem;
  margin: 1.3rem 0 0;
  color: var(--ink);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  font-size: 0.88rem;
}

.check-list li::marker {
  color: var(--mint);
}

.text-link,
.source-link,
.link-list a {
  color: var(--blue);
  font-weight: 750;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25rem;
}

.role-card .text-link {
  display: inline-block;
  margin-top: 1.2rem;
  color: var(--mint-dark);
}

.section {
  padding: clamp(5rem, 9vw, 8rem) var(--gutter);
}

.section-soft {
  background: var(--paper-soft);
}

.section-contrast {
  background: var(--paper-warm);
}

.section-dark {
  color: var(--ink);
  background: var(--paper-soft);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.7fr);
  gap: 1rem clamp(2rem, 6vw, 6rem);
  align-items: end;
  margin: 0 auto clamp(2.7rem, 5vw, 4.2rem);
}

.section-heading .section-kicker {
  grid-column: 1 / -1;
  margin-bottom: 0.25rem;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2.3rem, 4.8vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.section-heading > p:not(.section-kicker) {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.section-dark .section-heading > p:not(.section-kicker) {
  color: var(--ink-soft);
}

.section-dark .section-kicker {
  color: var(--mint-dark);
}

.compact-heading {
  grid-template-columns: 1fr 0.65fr;
}

.inline-actions {
  grid-column: 2;
  margin-top: 0.25rem;
}

.impact-section {
  padding-top: clamp(2.8rem, 5vw, 4rem);
  padding-bottom: clamp(2.8rem, 5vw, 4rem);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.impact-section .section-heading {
  grid-template-columns: minmax(220px, 0.55fr) minmax(280px, 1fr);
  margin-bottom: 1.5rem;
}

.impact-section .section-heading h2 {
  font-size: clamp(1.9rem, 3.2vw, 3rem);
}

.impact-section .section-heading > p:not(.section-kicker) {
  max-width: 650px;
  font-size: 0.92rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0 auto;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.metric-card {
  display: flex;
  flex-direction: column;
  min-height: 205px;
  padding: 1.15rem;
  background: transparent;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric-card > strong {
  color: var(--mint-dark);
  font-size: clamp(1.35rem, 2.1vw, 2rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
}

.metric-card h3 {
  margin: 0.65rem 0 0;
  font-size: 0.93rem;
  line-height: 1.25;
}

.metric-card p {
  margin: 0.55rem 0 1rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.evidence-label,
.metric-card .source-link {
  margin-top: auto;
  font-size: 0.73rem;
}

.evidence-label {
  color: #6a6a67;
  font-family: var(--mono);
}

.case-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 auto;
}

.case-card {
  padding: clamp(1.4rem, 3vw, 2.3rem);
  background: var(--white);
  border: 1px solid var(--line);
}

.case-heading {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr);
  gap: 1rem;
}

.case-index {
  margin: 0;
  padding-top: 0.15rem;
}

.case-type {
  margin: 0 0 0.45rem;
}

.case-card h3,
.publication-list h3 {
  margin: 0;
  font-size: clamp(1.45rem, 2.7vw, 2.25rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.case-card > p {
  max-width: 900px;
  margin: 1.1rem 0;
  color: var(--ink-soft);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  padding: 0;
  margin: 0 0 1.2rem;
  list-style: none;
}

.tag-list li {
  padding: 0.33rem 0.55rem;
  color: #474744;
  background: #f0f0ed;
  border: 1px solid #cececa;
  border-radius: 0.25rem;
  font-family: var(--mono);
  font-size: 0.67rem;
}

details {
  border-top: 1px solid var(--line);
}

summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0 0;
  color: var(--mint-dark);
  cursor: pointer;
  font-size: 0.86rem;
  font-weight: 800;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 1.15rem;
  line-height: 1;
}

details[open] summary::after {
  content: "−";
}

.details-content {
  padding: 0.9rem 0 0.2rem;
  color: var(--ink-soft);
}

.details-content > :first-child {
  margin-top: 0;
}

.details-content ul {
  display: grid;
  gap: 0.55rem;
  padding-left: 1.2rem;
}

.details-content li::marker {
  color: var(--mint-dark);
}

.link-list {
  margin: 1rem 0 0.5rem;
}

.link-list a {
  font-size: 0.82rem;
}

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

.capability-grid article {
  padding: 1.6rem;
  background: var(--white);
  border: 1px solid var(--line);
}

.capability-grid h3,
.subsection-title,
.three-column-details h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
  line-height: 1.3;
}

.capability-grid p {
  margin: 0;
  color: var(--ink-soft);
}

.wide-details {
  max-width: var(--max);
  margin: 1rem auto 0;
  padding: 0 1.3rem 1rem;
  background: var(--white);
  border: 1px solid var(--line);
}

.wide-details summary {
  padding-top: 1rem;
}

.technology-groups,
.three-column-details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 2rem;
  padding-top: 1rem;
}

.technology-groups div {
  display: grid;
  gap: 0.2rem;
}

.technology-groups strong {
  font-size: 0.85rem;
}

.technology-groups span {
  color: var(--ink-soft);
}

.two-column-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2.5rem, 7vw, 6rem);
  margin: 0 auto;
}

.subsection-title {
  padding-bottom: 0.9rem;
  margin-bottom: 0;
  border-bottom: 2px solid var(--ink);
}

.timeline,
.education-list {
  padding: 0;
  margin: 0;
  list-style: none;
}

.timeline > li {
  display: grid;
  grid-template-columns: 7.2rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}

.timeline time,
.education-head time {
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
}

.timeline time span {
  color: #696966;
}

.timeline h4 {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.35;
}

.timeline h4 span {
  color: var(--ink-soft);
  font-weight: 650;
}

.timeline p,
.education-list > li > p {
  margin: 0.3rem 0 0;
  color: var(--ink-soft);
  font-size: 0.84rem;
}

.education-list > li {
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}

.education-head {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 0.8rem;
}

.education-head strong {
  font-size: 0.96rem;
  line-height: 1.35;
}

.education-list details {
  margin-top: 0.75rem;
}

.education-list summary {
  padding-top: 0.75rem;
  font-size: 0.78rem;
}

.education-list .details-content {
  font-size: 0.84rem;
}

.credentials-details {
  margin-top: 2.5rem;
}

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

.three-column-details p {
  margin: 0;
  color: var(--ink-soft);
}

.repository-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 auto;
}

.repository-grid a {
  display: flex;
  flex-direction: column;
  min-height: 220px;
  padding: 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
}

.repository-grid a:hover {
  border-color: var(--mint);
}

.repository-grid strong {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1rem;
}

.repository-grid span {
  margin: 0.8rem 0 1.4rem;
  color: var(--ink-soft);
}

.repository-grid em,
.media-grid em {
  margin-top: auto;
  color: var(--mint-dark);
  font-size: 0.8rem;
  font-style: normal;
  font-weight: 800;
}

.profile-actions {
  margin: 1.5rem auto 0;
}

.button-light {
  color: var(--ink-strong);
  background: var(--mint);
}

.publication-list {
  display: grid;
  gap: 1rem;
  margin: 0 auto;
}

.publication-list > article {
  padding: clamp(1.4rem, 3vw, 2.2rem);
  border: 1px solid var(--line);
}

.publication-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.9rem;
  color: #686865;
  font-family: var(--mono);
  font-size: 0.69rem;
}

.publication-list article > p {
  max-width: 900px;
  margin: 0.9rem 0 1.1rem;
  color: var(--ink-soft);
}

.publication-list .source-link {
  font-size: 0.82rem;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 auto;
}

.media-grid > a {
  display: flex;
  flex-direction: column;
  min-height: 280px;
  padding: 1.5rem;
  background: var(--white);
  border: 1px solid var(--line);
}

.media-grid > a:hover {
  border-color: var(--mint-dark);
}

.media-grid > a > span {
  margin-bottom: 0.9rem;
  color: var(--mint-dark);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
}

.media-grid strong {
  font-size: 1.25rem;
  line-height: 1.3;
}

.media-grid p {
  margin: 0.9rem 0 1.4rem;
  color: var(--ink-soft);
}

.media-grid em {
  color: var(--blue);
}

.profile-section {
  color: var(--ink);
  background: #e7e7e4;
}

.profile-section .section-kicker {
  color: var(--mint-dark);
}

.profile-section .section-heading > p:not(.section-kicker) {
  color: var(--ink-soft);
}

.profile-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0 auto;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.profile-links a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.25rem 1rem;
  min-height: 150px;
  padding: 1.3rem;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.profile-links a:hover {
  background: rgba(255, 255, 255, 0.6);
}

.profile-links strong {
  font-size: 1rem;
}

.profile-links span {
  grid-column: 1 / -1;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.profile-links em {
  color: var(--mint-dark);
  font-style: normal;
}

.site-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
  min-height: 110px;
  padding: 1.5rem var(--gutter);
  color: #aebfca;
  background: var(--ink-strong);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.75rem;
}

.site-footer > div {
  display: grid;
}

.site-footer strong {
  color: var(--white);
}

.site-footer p {
  margin: 0;
  text-align: center;
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: auto auto auto;
  }

  .menu-toggle {
    display: inline-flex;
    justify-self: end;
    padding: 0.55rem 0.75rem;
    color: var(--white);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.32);
    border-radius: 0.3rem;
    cursor: pointer;
    font-size: 0.76rem;
    font-weight: 700;
  }

  .main-nav {
    position: fixed;
    top: 76px;
    right: 0;
    bottom: 0;
    left: 0;
    display: none;
    align-items: stretch;
    justify-content: flex-start;
    flex-direction: column;
    gap: 0;
    padding: 1rem var(--gutter) 2rem;
    background: var(--ink-strong);
  }

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

  .main-nav > a {
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    font-size: 1rem;
  }

  .main-nav .nav-contact {
    margin-top: 1rem;
    padding: 0.8rem 1rem;
    text-align: center;
    border-bottom: 0;
  }

  .language-switch {
    grid-column: 3;
  }

  .menu-toggle {
    grid-column: 2;
    grid-row: 1;
  }
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 5rem;
  }

  .hero-main,
  .role-card {
    max-width: none;
    justify-self: stretch;
  }

  .section-heading,
  .compact-heading,
  .impact-section .section-heading {
    grid-template-columns: 1fr;
    align-items: start;
  }

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

  .case-list {
    grid-template-columns: 1fr;
  }

  .inline-actions {
    grid-column: 1;
  }

  .capability-grid,
  .three-column-details {
    grid-template-columns: 1fr;
  }

  .two-column-layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  html {
    scroll-padding-top: 5rem;
  }

  .site-header {
    grid-template-columns: 1fr auto auto;
    gap: 0.55rem;
    min-height: 68px;
  }

  .brand-copy span {
    display: none;
  }

  .brand-mark {
    width: 2rem;
    height: 2rem;
  }

  .main-nav {
    top: 68px;
  }

  .language-switch button {
    min-width: 1.9rem;
    min-height: 1.85rem;
    padding: 0.15rem 0.3rem;
  }

  .menu-toggle {
    padding: 0.48rem 0.58rem;
  }

  .hero {
    gap: 2.2rem;
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .hero h1 {
    font-size: clamp(2.7rem, 13vw, 4rem);
  }

  .section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .section-heading h2 {
    font-size: clamp(2.1rem, 10vw, 3rem);
  }

  .metric-grid,
  .repository-grid,
  .media-grid,
  .profile-links,
  .technology-groups {
    grid-template-columns: 1fr;
  }

  .metric-card,
  .repository-grid a,
  .media-grid > a {
    min-height: 0;
  }

  .case-heading {
    grid-template-columns: 2rem minmax(0, 1fr);
  }

  .timeline > li,
  .education-head {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 0.8rem;
    text-align: left;
  }

  .site-footer p {
    text-align: left;
  }
}

@media print {
  .site-header,
  .skip-link,
  .hero-actions,
  .profile-actions {
    display: none !important;
  }

  .hero,
  .section-dark,
  .profile-section,
  .site-footer {
    color: var(--ink);
    background: var(--white);
  }

  details > * {
    display: block !important;
  }

  a {
    text-decoration: underline;
  }
}