:root {
  --ink-950: #06101d;
  --ink-900: #0a1728;
  --ink-800: #12243a;
  --ink-700: #263b50;
  --ink-600: #40576c;
  --ink-500: #667b8e;
  --paper: #f5f7f8;
  --white: #ffffff;
  --line: #d9e1e6;
  --cyan: #29d9c2;
  --cyan-dark: #007f75;
  --amber: #ffbd5c;
  --green: #95e7c8;
  --shadow: 0 22px 60px rgba(6, 16, 29, 0.12);
  --radius: 22px;
  --max-width: 1180px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-900);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body.nav-open { overflow: hidden; }
a { color: inherit; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 4px; }

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  background: var(--white);
  color: var(--ink-950);
  border-radius: 8px;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.section-shell, .nav-shell {
  width: min(calc(100% - 40px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(217, 225, 230, 0.86);
  background: rgba(245, 247, 248, 0.91);
  backdrop-filter: blur(18px);
}

.site-header.is-scrolled { box-shadow: 0 8px 28px rgba(6, 16, 29, 0.08); }

.nav-shell {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-950);
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--ink-950);
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.brand-copy { display: grid; line-height: 1.22; }
.brand-copy strong { font-size: 0.96rem; }
.brand-copy span {
  color: var(--ink-600);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.primary-navigation {
  display: flex;
  align-items: center;
  gap: 24px;
}

.primary-navigation a {
  position: relative;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--ink-700);
  font-size: 0.87rem;
  font-weight: 720;
  text-decoration: none;
}

.primary-navigation a:not(.nav-cta)::after {
  position: absolute;
  right: 0;
  bottom: 6px;
  left: 0;
  height: 2px;
  background: var(--cyan-dark);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.primary-navigation a:hover::after,
.primary-navigation a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.primary-navigation .nav-cta {
  padding: 0 17px;
  border-radius: 999px;
  background: var(--ink-950);
  color: var(--white);
}

.nav-toggle {
  width: 46px;
  height: 46px;
  display: none;
  place-content: center;
  gap: 5px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  cursor: pointer;
}

.nav-toggle > span:not(.sr-only) {
  width: 19px;
  height: 2px;
  display: block;
  background: var(--ink-950);
  transition: transform 180ms ease, opacity 180ms ease;
}

.hero {
  min-height: calc(100vh - 76px);
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(330px, 0.7fr);
  align-items: center;
  gap: clamp(48px, 8vw, 100px);
  padding-block: clamp(72px, 9vw, 128px);
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: 76px;
  right: 0;
  width: 42vw;
  height: 620px;
  background-image: linear-gradient(rgba(69, 140, 255, 0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(69, 140, 255, 0.07) 1px, transparent 1px);
  background-size: 34px 34px;
  content: "";
  mask-image: linear-gradient(to bottom left, #000 20%, transparent 78%);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--cyan-dark);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  color: var(--ink-950);
  font-size: clamp(3.3rem, 6.4vw, 6.3rem);
  font-weight: 820;
  letter-spacing: -0.065em;
  line-height: 0.98;
}

.hero h1 span { color: var(--cyan-dark); }

.hero-lead {
  max-width: 780px;
  margin: 30px 0 0;
  color: var(--ink-800);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.46;
}

.hero-detail {
  max-width: 730px;
  margin: 18px 0 0;
  color: var(--ink-600);
  font-size: 1.02rem;
}

.signal-list, .tech-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.signal-list li, .tech-row li {
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-700);
  font-size: 0.76rem;
  font-weight: 750;
}

.hero-actions, .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 780;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--ink-950); color: var(--white); }
.button-primary:hover { background: var(--cyan-dark); }
.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.76);
  color: var(--ink-900);
}
.button-secondary:hover { border-color: var(--ink-500); background: var(--white); }
.button-light { background: var(--white); color: var(--ink-950); }
.button-light:hover { background: var(--cyan); }

.hero-system { position: relative; }

.profile-card {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  align-items: center;
  gap: 18px;
  margin: 0 20px -34px;
  padding: 13px;
  border: 1px solid rgba(6, 16, 29, 0.1);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 18px 42px rgba(6, 16, 29, 0.16);
  backdrop-filter: blur(14px);
}

.portrait-frame {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: 14px;
  background: var(--ink-900);
}

.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 22%;
}

.profile-copy > span {
  display: block;
  margin-bottom: 7px;
  color: var(--cyan-dark);
  font-size: 0.65rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.profile-copy p {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0;
  color: var(--ink-950);
  font-size: 0.94rem;
  font-weight: 820;
  line-height: 1.25;
}

.profile-copy svg {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--cyan-dark);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.profile-copy small {
  display: block;
  margin-top: 8px;
  color: var(--ink-600);
  font-size: 0.69rem;
  font-weight: 720;
  line-height: 1.35;
}

.system-card {
  padding: 66px 26px 28px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  background: var(--ink-950);
  color: var(--white);
  box-shadow: var(--shadow);
}

.system-card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}
.system-card-heading p { margin: 0; font-size: 1.03rem; font-weight: 800; }
.system-card-heading > span {
  padding: 5px 8px;
  border: 1px solid rgba(149, 231, 200, 0.32);
  border-radius: 999px;
  color: var(--green);
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.system-flow { margin: 0; padding: 0; list-style: none; }
.system-flow li {
  display: grid;
  grid-template-columns: 30px 78px 1fr;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}
.system-flow li > span {
  color: var(--cyan);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.65rem;
}
.system-flow strong { font-size: 0.82rem; }
.system-flow small { color: #9eb0c2; font-size: 0.7rem; line-height: 1.3; }

.proof-strip { border-block: 1px solid var(--line); background: var(--white); }
.proof-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.proof-grid p {
  min-height: 116px;
  display: grid;
  align-content: center;
  gap: 4px;
  margin: 0;
  padding: 24px 34px;
  border-left: 1px solid var(--line);
}
.proof-grid p:last-child { border-right: 1px solid var(--line); }
.proof-grid strong { font-size: 0.95rem; }
.proof-grid span { color: var(--ink-600); font-size: 0.82rem; }

.content-section { padding-block: clamp(88px, 10vw, 144px); }
.section-intro { max-width: 770px; }
.section-intro h2, .contact-copy h2 {
  margin: 0;
  color: var(--ink-950);
  font-size: clamp(2.4rem, 4.6vw, 4.5rem);
  font-weight: 810;
  letter-spacing: -0.052em;
  line-height: 1.03;
}
.section-intro > p:last-child, .contact-copy > p {
  margin: 22px 0 0;
  color: var(--ink-600);
  font-size: 1.05rem;
}

.split-intro {
  max-width: none;
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  align-items: end;
  gap: clamp(40px, 8vw, 110px);
}
.split-intro > p { margin: 0 0 4px; }

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 56px;
}

.capability-card {
  min-height: 330px;
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.7);
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.capability-card:hover {
  border-color: #b5c6d1;
  transform: translateY(-4px);
  box-shadow: 0 18px 44px rgba(6, 16, 29, 0.08);
}
.capability-card.accent-card {
  border-color: rgba(0, 127, 117, 0.25);
  background: linear-gradient(145deg, rgba(41, 217, 194, 0.13), rgba(255, 255, 255, 0.82));
}
.card-number, .case-index {
  color: var(--cyan-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  font-weight: 800;
}
.capability-card h3 {
  margin: 32px 0 10px;
  color: var(--ink-950);
  font-size: 1.25rem;
  line-height: 1.2;
}
.capability-card p { margin: 0; color: var(--ink-600); font-size: 0.9rem; }
.capability-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin: auto 0 0;
  padding: 28px 0 0;
  color: var(--ink-700);
  font-size: 0.7rem;
  font-weight: 760;
  list-style: none;
}
.capability-card li::before { margin-right: 6px; color: var(--cyan-dark); content: "+"; }

.dark-section, .reliability-section {
  position: relative;
  overflow: hidden;
  background: var(--ink-950);
  color: var(--white);
}
.dark-section::after, .reliability-section::after {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(41, 217, 194, 0.12), transparent 68%);
  content: "";
  pointer-events: none;
}
.dark-section::after { top: -300px; right: -200px; }
.experience-layout { position: relative; z-index: 1; padding-block: clamp(88px, 10vw, 140px); }
.light-copy .eyebrow { color: var(--cyan); }
.light-copy h2 { color: var(--white); }
.light-copy > p:last-child { color: #a9b8c7; }

.experience-card {
  margin-top: 56px;
  padding: clamp(28px, 5vw, 58px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(18, 36, 58, 0.7);
}
.experience-card > header {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.experience-card .role {
  margin: 0;
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.experience-card h3 {
  margin: 4px 0 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  letter-spacing: -0.04em;
  line-height: 1;
}
.role-dates {
  margin: 2px 0 0;
  color: var(--white);
  font-size: 0.82rem;
  font-weight: 740;
  text-align: right;
}
.role-dates span { color: #91a6b8; font-weight: 560; }
.experience-summary {
  max-width: 900px;
  margin: 30px 0 0;
  color: #d8e1e8;
  font-size: 1.15rem;
}
.experience-groups {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  margin-top: 44px;
}
.experience-groups h4 { margin: 0 0 16px; color: var(--white); font-size: 0.94rem; }
.experience-groups ul { margin: 0; padding: 0; color: #a9b8c7; font-size: 0.83rem; list-style: none; }
.experience-groups li { position: relative; margin-top: 13px; padding-left: 17px; }
.experience-groups li::before { position: absolute; top: 0; left: 0; color: var(--cyan); content: "•"; }

.experience-archive-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.experience-archive-cta strong { color: var(--white); font-size: 0.94rem; }
.experience-archive-cta p { max-width: 720px; margin: 5px 0 0; color: #9eb0c2; font-size: 0.82rem; }
.experience-archive-cta .button { flex: none; }

.case-list { margin-top: 64px; border-top: 1px solid var(--line); }
.case-card {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 24px;
  padding-block: 52px;
  border-bottom: 1px solid var(--line);
}
.case-index { padding-top: 5px; }
.case-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 32px; }
.case-type, .paper-label {
  margin: 0 0 8px;
  color: var(--cyan-dark);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.case-heading h3 {
  max-width: 760px;
  margin: 0;
  color: var(--ink-950);
  font-size: clamp(1.65rem, 3.2vw, 2.6rem);
  letter-spacing: -0.035em;
  line-height: 1.09;
}
.status {
  flex: none;
  padding: 6px 10px;
  border: 1px solid #c7d3dc;
  border-radius: 999px;
  background: var(--white);
  color: var(--ink-600);
  font-size: 0.63rem;
  font-weight: 850;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}
.status-working {
  border-color: rgba(0, 127, 117, 0.24);
  background: rgba(41, 217, 194, 0.12);
  color: #006b63;
}
.case-lead { max-width: 880px; margin: 18px 0 0; color: var(--ink-600); font-size: 1.02rem; }
.case-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 30px;
}
.case-columns h4 { margin: 0 0 8px; color: var(--ink-900); font-size: 0.8rem; }
.case-columns p { margin: 0; color: var(--ink-600); font-size: 0.82rem; }
.tech-row { margin-top: 26px; }

.reliability-section::after { right: 20%; bottom: -440px; }
.reliability-layout { position: relative; z-index: 1; padding-block: clamp(88px, 10vw, 140px); }
.loop-diagram {
  display: grid;
  grid-template-columns: 1fr 28px 1fr 28px 1fr 28px 1fr 28px 1fr;
  align-items: stretch;
  margin-top: 60px;
}
.loop-step {
  min-height: 200px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
}
.loop-step span {
  display: block;
  color: var(--cyan);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.68rem;
}
.loop-step strong { display: block; margin-top: 38px; font-size: 1rem; }
.loop-step p { margin: 8px 0 0; color: #9eb0c2; font-size: 0.76rem; line-height: 1.45; }
.loop-arrow { display: grid; place-items: center; color: #50677c; }
.principle-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  margin-top: 62px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.principle-grid h3 { margin: 0; font-size: 0.92rem; }
.principle-grid p { margin: 10px 0 0; color: #9eb0c2; font-size: 0.78rem; }

.research-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 18px;
  margin-top: 56px;
}
.featured-paper, .research-stack article, .education-row article {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
}
.featured-paper {
  min-height: 400px;
  display: flex;
  flex-direction: column;
  padding: clamp(30px, 5vw, 52px);
  background: linear-gradient(145deg, #ffffff, #edf9f6);
}
.featured-paper h3 {
  max-width: 680px;
  margin: 40px 0 0;
  color: var(--ink-950);
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  letter-spacing: -0.045em;
  line-height: 1.08;
}
.featured-paper > p:not(.paper-label) { max-width: 680px; margin: 18px 0 0; color: var(--ink-600); }
.featured-paper a, .research-stack a {
  width: fit-content;
  margin-top: auto;
  padding-top: 26px;
  color: var(--cyan-dark);
  font-size: 0.8rem;
  font-weight: 820;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.research-stack { display: grid; gap: 18px; }
.research-stack article { min-height: 191px; display: flex; flex-direction: column; padding: 28px; }
.research-stack h3 { margin: 18px 0 0; color: var(--ink-900); font-size: 1.12rem; line-height: 1.25; }
.education-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 18px; }
.education-row article { padding: 28px; }
.education-row p {
  margin: 0;
  color: var(--cyan-dark);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.education-row h3 { margin: 12px 0 2px; font-size: 1rem; }
.education-row span { color: var(--ink-600); font-size: 0.78rem; }

.toolkit-section {
  padding-block: clamp(78px, 9vw, 120px);
  border-block: 1px solid var(--line);
  background: var(--white);
}
.toolkit-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(50px, 9vw, 120px);
}
.toolkit-layout .section-intro h2 { font-size: clamp(2.2rem, 4vw, 3.7rem); }
.tool-groups { border-top: 1px solid var(--line); }
.tool-groups > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 28px;
  padding-block: 24px;
  border-bottom: 1px solid var(--line);
}
.tool-groups h3 { margin: 0; color: var(--ink-900); font-size: 0.84rem; }
.tool-groups p { margin: 0; color: var(--ink-600); font-size: 0.82rem; }

.contact-section {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(60px, 10vw, 140px);
  padding-block: clamp(88px, 11vw, 150px);
}
.contact-copy h2 { max-width: 800px; }
.contact-copy > p { max-width: 710px; }
.personal-note {
  align-self: end;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
}
.personal-note > p {
  margin: 0;
  color: var(--cyan-dark);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.personal-note ul { margin: 18px 0 0; padding: 0; color: var(--ink-700); list-style: none; }
.personal-note li + li { margin-top: 9px; }
.personal-note li::before { margin-right: 10px; color: var(--cyan-dark); content: "+"; }

.site-footer { background: var(--ink-950); color: #9eb0c2; }
.footer-inner {
  min-height: 118px;
  display: grid;
  grid-template-columns: 1fr 1.5fr auto;
  align-items: center;
  gap: 30px;
  font-size: 0.76rem;
}
.footer-inner p { margin: 0; }
.footer-inner a { color: var(--white); font-weight: 760; text-decoration: none; }

/* Experience and project archive */
.archive-page { background: #f2f5f6; }

.archive-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(92px, 12vw, 170px);
  background: var(--ink-950);
  color: var(--white);
}
.archive-hero::after {
  position: absolute;
  top: -280px;
  right: -160px;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(41, 217, 194, 0.16), transparent 68%);
  content: "";
  pointer-events: none;
}
.archive-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: end;
  gap: clamp(50px, 10vw, 130px);
}
.archive-hero .eyebrow { color: var(--cyan); }
.archive-hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(3.4rem, 6.2vw, 6.2rem);
  font-weight: 820;
  letter-spacing: -0.065em;
  line-height: 0.96;
}
.archive-hero-copy > p {
  margin: 0;
  color: #c2ced8;
  font-size: 1.05rem;
}
.archive-hero-copy > p + p { margin-top: 16px; color: #91a6b8; font-size: 0.9rem; }
.archive-hero .button-primary { background: var(--cyan); color: var(--ink-950); }
.archive-hero .button-secondary { border-color: rgba(255,255,255,0.22); background: transparent; color: var(--white); }
.archive-proof { position: relative; z-index: 2; }

.draft-notice {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  margin-top: 34px;
  padding: 18px 22px;
  border: 1px solid rgba(175, 113, 0, 0.22);
  border-radius: 12px;
  background: #fff5dc;
  color: #624a1c;
}
.draft-notice span { font-size: 0.71rem; font-weight: 850; letter-spacing: 0.08em; text-transform: uppercase; }
.draft-notice p { margin: 0; font-size: 0.78rem; }

.career-snapshot {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 34px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: 0 12px 32px rgba(6, 16, 29, 0.06);
}
.career-snapshot > div { min-height: 98px; display: grid; align-content: center; gap: 5px; padding: 20px 24px; }
.career-snapshot > div + div { border-left: 1px solid var(--line); }
.career-snapshot span { color: var(--cyan-dark); font-size: 0.75rem; font-weight: 820; letter-spacing: 0.06em; text-transform: uppercase; }
.career-snapshot strong { color: var(--ink-900); font-size: 0.86rem; line-height: 1.35; }

.archive-section { padding-block: clamp(88px, 10vw, 140px); }
.timeline { margin-top: 64px; border-top: 1px solid var(--line); }
.timeline-item {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: clamp(30px, 6vw, 80px);
  padding-block: 38px;
  border-bottom: 1px solid var(--line);
}
.timeline-item.current-role {
  margin-top: 18px;
  padding: 38px;
  border: 1px solid rgba(0, 127, 117, 0.24);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(41, 217, 194, 0.12), var(--white));
}
.timeline-date {
  padding-top: 5px;
  color: var(--cyan-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.76rem;
  font-weight: 800;
}
.timeline-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.timeline-heading p { margin: 0; color: var(--ink-600); font-size: 0.74rem; font-weight: 760; }
.timeline-heading h3 {
  margin: 4px 0 0;
  color: var(--ink-950);
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.timeline-body > p { max-width: 820px; margin: 15px 0 0; color: var(--ink-600); font-size: 0.88rem; }
.experience-points {
  max-width: 900px;
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  color: var(--ink-700);
  font-size: 0.9rem;
  list-style: none;
}
.experience-points li { position: relative; padding-left: 20px; }
.experience-points li::before { position: absolute; top: 0; left: 0; color: var(--cyan-dark); font-weight: 900; content: "+"; }
.role-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.role-links a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--white);
  color: var(--cyan-dark);
  font-size: 0.75rem;
  font-weight: 800;
  text-decoration: none;
}
.role-links a:hover { border-color: var(--cyan-dark); }
.current-role .role-links a { background: rgba(255,255,255,0.8); }
.timeline-body .tech-row { margin-top: 18px; }
.timeline-links, .project-links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 18px; }
.timeline-links a, .project-link, .text-link {
  color: var(--cyan-dark);
  font-size: 0.76rem;
  font-weight: 820;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.archive-projects .archive-section { position: relative; z-index: 1; }
.archive-group-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 70px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.14);
}
.archive-group-heading p { margin: 0; color: var(--white); font-size: 0.78rem; font-weight: 850; letter-spacing: 0.1em; text-transform: uppercase; }
.archive-group-heading span { color: #8096aa; font-size: 0.7rem; }
.archive-group-heading.second-group { margin-top: 90px; }

.catalogue-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 22px;
}
.project-card {
  min-height: 350px;
  display: flex;
  flex-direction: column;
  padding: 30px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 18px;
  background: rgba(255,255,255,0.045);
}
.project-card.featured-project { background: linear-gradient(145deg, rgba(41, 217, 194, 0.14), rgba(255,255,255,0.05)); }
.project-meta { margin: 0; color: var(--cyan); font-size: 0.67rem; font-weight: 850; letter-spacing: 0.09em; text-transform: uppercase; }
.project-card h3 { margin: 24px 0 0; color: var(--white); font-size: 1.5rem; letter-spacing: -0.03em; line-height: 1.12; }
.project-card > p:not(.project-meta) { margin: 14px 0 0; color: #a9b8c7; font-size: 0.84rem; }
.project-card > ul { margin: 20px 0 0; padding: 0; color: #a9b8c7; font-size: 0.77rem; list-style: none; }
.project-card > ul li { position: relative; margin-top: 7px; padding-left: 16px; }
.project-card > ul li::before { position: absolute; left: 0; color: var(--cyan); content: "+"; }
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: auto;
  padding-top: 24px;
}
.project-tags span {
  padding: 5px 9px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  color: #c4d0da;
  font-size: 0.65rem;
  font-weight: 720;
}
.project-card .project-link { width: fit-content; margin-top: auto; padding-top: 24px; color: var(--cyan); }
.project-card .project-links { margin-top: auto; padding-top: 24px; }
.project-card .project-links .project-link { margin: 0; padding: 0; }

.light-catalogue .project-card { border-color: rgba(255,255,255,0.16); background: var(--white); }
.light-catalogue .project-meta { color: var(--cyan-dark); }
.light-catalogue .project-card h3 { color: var(--ink-950); }
.light-catalogue .project-card > p:not(.project-meta) { color: var(--ink-600); }
.light-catalogue .project-tags span { border-color: var(--line); color: var(--ink-600); }
.light-catalogue .project-link { color: var(--cyan-dark); }

.writing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 56px;
}
.writing-grid > a {
  min-height: 280px;
  display: flex;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.writing-grid > a:hover { transform: translateY(-4px); box-shadow: 0 18px 44px rgba(6,16,29,0.08); }
.writing-grid span { color: var(--cyan-dark); font-size: 0.67rem; font-weight: 850; letter-spacing: 0.08em; text-transform: uppercase; }
.writing-grid h3 { margin: 30px 0 0; color: var(--ink-950); font-size: 1.35rem; line-height: 1.18; }
.writing-grid p { margin: 12px 0 0; color: var(--ink-600); font-size: 0.82rem; }
.writing-grid strong { margin-top: auto; padding-top: 24px; color: var(--cyan-dark); font-size: 0.75rem; }
.archive-section > .text-link { display: inline-block; margin-top: 28px; }

.publication-list { margin-top: 58px; border-top: 1px solid var(--line); }
.publication-row {
  display: grid;
  grid-template-columns: 88px 1fr auto;
  align-items: center;
  gap: 34px;
  padding: 34px 30px;
  border-bottom: 1px solid var(--line);
}
.publication-row.featured-publication {
  margin-top: 16px;
  border: 1px solid rgba(0,127,117,0.24);
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(41,217,194,0.12), var(--white));
}
.publication-year {
  color: var(--cyan-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8rem;
  font-weight: 850;
}
.publication-row p { margin: 0; color: var(--cyan-dark); font-size: 0.75rem; font-weight: 820; letter-spacing: 0.05em; text-transform: uppercase; }
.publication-row h3 { max-width: 760px; margin: 8px 0 0; color: var(--ink-950); font-size: 1.12rem; line-height: 1.25; }
.publication-row span { display: block; margin-top: 7px; color: var(--ink-600); font-size: 0.78rem; }
.publication-row > a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--white);
  color: var(--cyan-dark);
  font-size: 0.75rem;
  font-weight: 820;
  text-decoration: none;
}

.credentials-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(50px, 9vw, 110px);
}
.education-feature { padding: 24px 0; border-top: 1px solid var(--line); }
.education-feature p { margin: 0; color: var(--cyan-dark); font-size: 0.67rem; font-weight: 850; letter-spacing: 0.08em; text-transform: uppercase; }
.education-feature h3 { margin: 10px 0 3px; color: var(--ink-950); font-size: 1.2rem; line-height: 1.22; }
.education-feature span { color: var(--ink-600); font-size: 0.76rem; }
.education-feature > a { display: inline-block; margin-top: 10px; color: var(--cyan-dark); font-size: 0.75rem; font-weight: 800; text-underline-offset: 4px; }
.credential-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 28px; }
.credential-grid > a {
  min-height: 190px;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  text-decoration: none;
  transition: border-color 180ms ease, transform 180ms ease;
}
.credential-grid > a:hover { border-color: var(--cyan-dark); transform: translateY(-3px); }
.credential-grid span { color: var(--cyan-dark); font-size: 0.72rem; font-weight: 820; letter-spacing: 0.07em; text-transform: uppercase; }
.credential-grid h3 { margin: 0; color: var(--ink-900); font-size: 0.82rem; }
.credential-grid span + h3 { margin-top: 22px; }
.credential-grid p { margin: 8px 0 0; color: var(--ink-600); font-size: 0.78rem; }
.credential-grid strong { margin-top: auto; padding-top: 18px; color: var(--cyan-dark); font-size: 0.75rem; }

@media (max-width: 1040px) {
  .primary-navigation { gap: 16px; }
  .primary-navigation a { font-size: 0.78rem; }
  .hero { grid-template-columns: 1fr 330px; gap: 46px; }
  .hero h1 { font-size: clamp(3rem, 6vw, 4.8rem); }
  .capability-grid, .experience-groups { grid-template-columns: repeat(2, 1fr); }
  .capability-card:last-child { grid-column: span 2; min-height: 270px; }
  .case-columns { gap: 20px; }
  .loop-diagram { grid-template-columns: 1fr 20px 1fr 20px 1fr 20px 1fr 20px 1fr; }
  .principle-grid { grid-template-columns: repeat(2, 1fr); }
  .career-snapshot { grid-template-columns: repeat(2, 1fr); }
  .career-snapshot > div:nth-child(3) { border-left: 0; }
  .career-snapshot > div:nth-child(n+3) { border-top: 1px solid var(--line); }
}

@media (max-width: 960px) {
  .section-shell, .nav-shell { width: min(calc(100% - 32px), var(--max-width)); }
  /* Keep the fixed menu relative to the viewport instead of the blurred header. */
  .site-header {
    background: var(--paper);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  .nav-toggle { display: grid; }
  .nav-toggle[aria-expanded="true"] > span:nth-of-type(2) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] > span:nth-of-type(3) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] > span:nth-of-type(4) { transform: translateY(-7px) rotate(-45deg); }
  .primary-navigation {
    position: fixed;
    top: 76px;
    right: 0;
    bottom: 0;
    left: 0;
    height: calc(100vh - 76px);
    height: calc(100dvh - 76px);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 26px 20px;
    padding-bottom: calc(26px + env(safe-area-inset-bottom, 0px));
    overflow-y: auto;
    overscroll-behavior-y: contain;
    background: var(--paper);
  }
  .primary-navigation.is-open { display: flex; }
  .primary-navigation a {
    flex-shrink: 0;
    min-height: 56px;
    padding: 0 14px;
    border-bottom: 1px solid var(--line);
    font-size: 1rem;
  }
  .primary-navigation .nav-cta { justify-content: center; margin-top: 16px; border-bottom: 0; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 64px; padding-block: 72px 90px; }
  .hero h1 { font-size: clamp(3.1rem, 12vw, 5.6rem); }
  .hero-system { width: min(100%, 520px); }
  .proof-grid { grid-template-columns: 1fr; }
  .proof-grid p { min-height: 94px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .proof-grid p:last-child { border-bottom: 0; }
  .split-intro, .research-grid, .toolkit-layout, .contact-section { grid-template-columns: 1fr; }
  .split-intro { align-items: start; }
  .capability-grid, .experience-groups { grid-template-columns: 1fr; }
  .capability-card:last-child { grid-column: auto; }
  .experience-groups { gap: 34px; }
  .case-card { grid-template-columns: 38px 1fr; gap: 10px; }
  .case-heading { display: block; }
  .status { display: inline-block; margin-top: 16px; }
  .case-columns { grid-template-columns: 1fr; }
  .loop-diagram { grid-template-columns: 1fr; gap: 0; }
  .loop-step { min-height: auto; }
  .loop-step strong { margin-top: 22px; }
  .loop-arrow { height: 34px; transform: rotate(90deg); }
  .research-stack article { min-height: 210px; }
  .footer-inner { min-height: 160px; grid-template-columns: 1fr auto; }
  .footer-inner p:nth-child(2) { grid-column: 1 / -1; grid-row: 2; }
  .experience-archive-cta { align-items: flex-start; flex-direction: column; }
  .archive-hero-grid, .credentials-layout { grid-template-columns: 1fr; }
  .archive-hero-grid { align-items: start; }
  .archive-hero h1 { font-size: clamp(3.6rem, 12vw, 6rem); }
  .draft-notice { grid-template-columns: 1fr; gap: 6px; }
  .timeline-item { grid-template-columns: 150px 1fr; gap: 24px; }
  .catalogue-grid { grid-template-columns: 1fr; }
  .project-card { min-height: 320px; }
  .writing-grid { grid-template-columns: 1fr; }
  .publication-row { grid-template-columns: 68px 1fr; }
  .publication-row > a { width: fit-content; grid-column: 2; }
}

@media (max-width: 560px) {
  .section-shell, .nav-shell { width: min(calc(100% - 28px), var(--max-width)); }
  .brand-copy span { display: none; }
  .hero { padding-top: 56px; }
  .hero h1 { font-size: clamp(2.9rem, 14.5vw, 4.4rem); }
  .hero-lead { font-size: 1.1rem; }
  .hero-actions, .contact-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .profile-card {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 14px;
    margin-inline: 10px;
    padding: 10px;
  }
  .profile-copy p { font-size: 0.86rem; }
  .profile-copy small { font-size: 0.65rem; }
  .system-card { padding-inline: 18px; }
  .system-card-heading { align-items: flex-start; flex-direction: column; }
  .system-flow li { grid-template-columns: 28px 68px 1fr; }
  .capability-card { min-height: 310px; }
  .experience-card { padding: 26px 20px; }
  .experience-card > header { flex-direction: column; gap: 18px; }
  .role-dates { text-align: left; }
  .case-card { grid-template-columns: 1fr; }
  .case-index { padding: 0; }
  .principle-grid, .education-row { grid-template-columns: 1fr; }
  .featured-paper { min-height: 460px; }
  .tool-groups > div { grid-template-columns: 1fr; gap: 8px; }
  .archive-hero h1 { font-size: clamp(3.2rem, 16vw, 4.7rem); }
  .timeline-item, .timeline-item.current-role { grid-template-columns: 1fr; }
  .timeline-item.current-role { padding: 28px 20px; }
  .timeline-heading { display: block; }
  .timeline-heading .status { margin-top: 12px; }
  .archive-group-heading { align-items: flex-start; flex-direction: column; gap: 4px; }
  .credential-grid { grid-template-columns: 1fr; }
  .career-snapshot { grid-template-columns: 1fr; }
  .career-snapshot > div + div { border-left: 0; border-top: 1px solid var(--line); }
  .publication-row, .publication-row.featured-publication { grid-template-columns: 1fr; gap: 14px; padding: 26px 20px; }
  .publication-row > a { grid-column: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}