:root {
  --paper: oklch(92% 0.018 82);
  --paper-cool: oklch(91% 0.018 188);
  --paper-ink: oklch(24% 0.02 255);
  --paper-muted: oklch(42% 0.025 255);
  --coral: oklch(62% 0.19 20);
  --coral-ink: oklch(42% 0.17 20);
  --cyan: oklch(79% 0.13 195);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --f-editorial: "Newsreader", Georgia, serif;
}

body {
  background: oklch(16% 0.018 255);
  font-size: 1rem;
}

:root {
  --ink-3: #7c899c;
}

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 5px;
}

.wrap {
  max-width: 1240px;
}

.section {
  padding-block: clamp(5rem, 10vw, 9rem);
}

.section-head {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: clamp(1rem, 2.4vw, 2rem);
  max-width: none;
  margin-bottom: clamp(3rem, 7vw, 6rem);
}

.section-head .eyebrow {
  grid-column: 1 / 4;
  align-self: start;
  margin-top: 0.65rem;
}

.section-head h2 {
  grid-column: 4 / 12;
  margin-top: 0;
  max-width: 16ch;
  font-family: var(--f-editorial);
  font-size: 5.5rem;
  font-weight: 400;
  line-height: 0.94;
  letter-spacing: 0;
}

.section-head p {
  grid-column: 4 / 10;
  margin-top: 1.5rem;
  max-width: 58ch;
}

.eyebrow {
  letter-spacing: 0.14em;
}

/* Navigation */
.nav-inner {
  width: 100%;
  min-width: 0;
  min-height: 4.75rem;
}

header.nav {
  width: 100%;
  max-width: 100vw;
  overflow-x: clip;
}

.brand,
.nav-links,
.nav-cta {
  letter-spacing: 0;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: inherit;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
  transition: transform 180ms var(--ease-out);
}

.nav-cta {
  min-height: 44px;
  align-items: center;
  display: inline-flex;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding-inline: 0;
}

/* Hero */
.hero {
  min-height: 92svh;
  grid-template-columns: minmax(0, 1.25fr) minmax(20rem, 0.75fr);
  padding-top: 7.5rem;
  padding-bottom: clamp(4rem, 8vw, 7rem);
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  background:
    radial-gradient(60% 80% at 78% 38%, rgba(70, 214, 230, 0.09), transparent 62%),
    radial-gradient(45% 70% at 15% 82%, rgba(255, 91, 110, 0.055), transparent 68%),
    linear-gradient(rgba(34, 48, 74, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 48, 74, 0.22) 1px, transparent 1px),
    var(--bg);
  background-size: auto, auto, 34px 34px, 34px 34px, auto;
  mask-image: linear-gradient(to bottom, #000 86%, transparent 100%);
}

.hero-copy {
  max-width: 680px;
}

.hero .tag {
  border: 0;
  border-left: 2px solid var(--build);
  padding: 0 0 0 0.8rem;
  letter-spacing: 0.12em;
}

.hero h1 {
  max-width: 18ch;
  font-family: var(--f-editorial);
  font-size: 3.75rem;
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0;
  text-wrap: balance;
}

.next-chapter {
  position: absolute;
  top: calc(100svh - 3.25rem);
  left: var(--gutter);
  display: inline-flex;
  gap: 0.65rem;
  align-items: center;
  min-height: 44px;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  color: var(--ink-3);
}

.next-chapter span {
  color: var(--build);
}

.hero-sub {
  max-width: 54ch;
  font-size: 1.05rem;
}

.hero-meta {
  gap: 0.55rem 1.25rem;
}

.chip {
  position: relative;
  border: 0;
  background: transparent;
  padding: 0;
  color: var(--ink-3);
}

.chip + .chip::before {
  content: "/";
  position: absolute;
  left: -0.8rem;
  color: var(--line);
}

.btn {
  min-height: 48px;
  border-radius: 0;
  letter-spacing: 0;
  transition: color 180ms var(--ease-out), background 180ms var(--ease-out), transform 180ms var(--ease-out);
}

.btn-ghost {
  border: 0;
  border-bottom: 1px solid var(--line);
  padding-inline: 0.25rem;
}

.graph-frame {
  border: 0;
  border-radius: 0;
  background: transparent;
  overflow: visible;
}

.graph-frame::before {
  display: none;
}

.graph-hud {
  top: 6px;
}

/* Editorial chapters */
#work,
#research,
#projects {
  color: var(--paper-ink);
  background: var(--paper);
  box-shadow: 0 0 0 100vmax var(--paper);
  clip-path: inset(0 -100vmax);
}

#research {
  background: var(--paper-cool);
  box-shadow: 0 0 0 100vmax var(--paper-cool);
}

#work .eyebrow,
#research .eyebrow,
#projects .eyebrow,
#work .section-head p,
#research .section-head p,
#projects .section-head p {
  color: var(--paper-muted);
}

#work .eyebrow::before,
#research .eyebrow::before,
#projects .eyebrow::before {
  background: color-mix(in oklch, var(--paper-ink), transparent 65%);
}

.duality {
  grid-template-columns: 5fr 7fr;
  gap: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  overflow: visible;
}

.duality > div {
  padding: clamp(2rem, 5vw, 4.5rem);
}

.duality .operation-side {
  background: color-mix(in oklch, var(--paper), var(--coral) 8%);
}

.duality .operation-side h3 {
  color: var(--coral-ink);
}

.duality .govern-side {
  margin-top: clamp(3rem, 7vw, 7rem);
  background: var(--paper-ink);
  color: var(--paper);
}

.duality h3 {
  align-items: flex-start;
  flex-direction: column;
  font-family: var(--f-editorial);
  font-size: 3.2rem;
  font-weight: 400;
  letter-spacing: 0;
}

.duality p,
.duality li {
  color: inherit;
  opacity: 0.78;
}

.duality li {
  font-family: var(--f-body);
}

/* Experience */
#experience .section-head h2,
#toolkit .section-head h2 {
  font-family: var(--f-editorial);
  letter-spacing: 0;
}

.experience-portrait {
  grid-column: 1 / 3;
  grid-row: 2 / span 2;
  width: min(100%, 10rem);
  margin-top: 1rem;
  aspect-ratio: 1;
  border: 1px solid color-mix(in oklch, var(--ink), transparent 72%);
  border-radius: 50%;
  overflow: hidden;
}

.experience-portrait img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.job {
  grid-template-columns: 2fr 7fr 2fr;
  border-color: var(--line);
}

.job-body {
  grid-column: 2 / 4;
  display: grid;
  grid-template-columns: 1fr 2fr;
  column-gap: clamp(2rem, 6vw, 6rem);
}

.job-role,
.job-org,
.job-loc {
  grid-column: 1;
}

.job-role {
  font-family: var(--f-editorial);
  font-size: 2.5rem;
  font-weight: 400;
  letter-spacing: 0;
}

.job ul {
  grid-column: 2;
  grid-row: 1 / span 4;
  margin-top: 0;
}

/* Research */
.pubs {
  border: 0;
  border-radius: 0;
  background: transparent;
}

.pub {
  grid-template-columns: 8fr 2fr;
  border-top: 1px solid color-mix(in oklch, var(--paper-ink), transparent 70%);
  background: transparent;
  padding-inline: 0;
}

.pub:last-child {
  border-bottom: 1px solid color-mix(in oklch, var(--paper-ink), transparent 70%);
}

.pub:hover {
  background: color-mix(in oklch, var(--paper-cool), var(--paper-ink) 5%);
}

.pub-title {
  font-family: var(--f-editorial);
  font-size: 1.9rem;
  font-weight: 400;
  letter-spacing: 0;
}

.pub-authors,
.pub-authors b,
.pub-venue,
.pub-venue.tier1 {
  color: var(--paper-muted);
}

.pub-venue,
.pub-venue.tier1 {
  border: 0;
  padding: 0;
  text-align: right;
}

/* Projects */
.proj-grid {
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
}

.proj {
  grid-column: span 7;
  border: 0;
  border-radius: 0;
  background: var(--paper-ink);
  color: var(--paper);
  padding: clamp(2rem, 5vw, 4rem);
}

.proj:nth-child(2) {
  grid-column: 8 / -1;
  margin-top: clamp(5rem, 11vw, 11rem);
  background: var(--coral);
  color: oklch(17% 0.03 20);
}

.proj:nth-child(2) .pk,
.proj:nth-child(2) .stack span,
.proj:nth-child(2) .visual-head,
.proj:nth-child(2) .cadence p {
  opacity: 1;
}

.proj:hover {
  transform: translateY(-6px);
  border-color: transparent;
}

.proj h3 {
  font-family: var(--f-editorial);
  font-size: 3.6rem;
  font-weight: 400;
  letter-spacing: 0;
}

.proj p,
.proj .pk,
.proj .stack span {
  color: inherit;
}

.proj .stack span {
  border: 0;
  padding: 0;
  opacity: 0.7;
}

.proj .stack span + span::before {
  content: "/";
  margin-right: 0.5rem;
  opacity: 0.45;
}

.project-visual {
  margin-top: clamp(2rem, 5vw, 4rem);
  border-top: 1px solid color-mix(in oklch, currentColor, transparent 70%);
  border-bottom: 1px solid color-mix(in oklch, currentColor, transparent 70%);
  padding-block: 1.25rem;
}

.visual-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  font-family: var(--f-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  opacity: 0.7;
}

.allocation-row {
  display: grid;
  grid-template-columns: 4rem 1fr 2rem;
  gap: 0.75rem;
  align-items: center;
  margin-top: 0.65rem;
  font-size: 0.8rem;
}

.allocation-row i {
  height: 5px;
  background: linear-gradient(90deg, var(--cyan) var(--value), color-mix(in oklch, currentColor, transparent 88%) var(--value));
}

.allocation-row b {
  font-family: var(--f-mono);
  font-weight: 400;
  text-align: right;
}

.cadence-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.45rem;
}

.cadence-days i {
  aspect-ratio: 1;
  border: 1px solid color-mix(in oklch, currentColor, transparent 58%);
}

.cadence-days i.done {
  background: currentColor;
}

.cadence p {
  margin-top: 1rem;
  font-size: 0.8rem;
  opacity: 0.7;
}

/* Toolkit without tag-cloud chrome */
.skills {
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
}

.skillcat {
  background: transparent;
  padding: 2rem 0 0;
}

.skillcat .tags {
  display: block;
}

.skillcat .tags span {
  display: block;
  border: 0;
  background: transparent;
  padding: 0.25rem 0;
}

/* Live GitHub activity */
.activity {
  display: grid;
  grid-template-columns: minmax(16rem, 4fr) minmax(0, 8fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: end;
  border-top: 1px solid var(--line);
}

.activity-intro h2 {
  max-width: 8ch;
  margin-top: 1.25rem;
  font-family: var(--f-editorial);
  font-size: 4.4rem;
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: 0;
}

.activity-intro p {
  max-width: 48ch;
  margin-top: 1.5rem;
  color: var(--ink-3);
}

.activity-profile {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  min-height: 44px;
  margin-top: 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--build);
}

.activity-calendar {
  min-width: 0;
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.activity-meta,
.activity-legend {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--f-mono);
  font-size: 0.68rem;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.activity-meta span:first-child {
  color: var(--ink);
}

.activity-scroll {
  overflow-x: auto;
  margin-block: 1.5rem 1rem;
  padding-bottom: 0.5rem;
  scrollbar-color: var(--line) transparent;
}

.github-calendar {
  display: block;
  min-width: 100%;
}

.github-calendar .calendar-label {
  fill: var(--ink-3);
  font-family: var(--f-mono);
  font-size: 8px;
}

.github-calendar rect,
.activity-legend i {
  fill: color-mix(in oklch, var(--ink), transparent 91%);
  background: color-mix(in oklch, var(--ink), transparent 91%);
}

.github-calendar [data-level="1"],
.activity-legend [data-level="1"] {
  fill: color-mix(in oklch, var(--build), var(--bg) 72%);
  background: color-mix(in oklch, var(--build), var(--bg) 72%);
}

.github-calendar [data-level="2"],
.activity-legend [data-level="2"] {
  fill: color-mix(in oklch, var(--build), var(--bg) 48%);
  background: color-mix(in oklch, var(--build), var(--bg) 48%);
}

.github-calendar [data-level="3"],
.activity-legend [data-level="3"] {
  fill: color-mix(in oklch, var(--build), var(--bg) 24%);
  background: color-mix(in oklch, var(--build), var(--bg) 24%);
}

.github-calendar [data-level="4"],
.activity-legend [data-level="4"] {
  fill: var(--build);
  background: var(--build);
}

.activity-legend {
  justify-content: flex-end;
  align-items: center;
  text-transform: none;
  letter-spacing: 0;
}

.activity-legend i {
  width: 10px;
  height: 10px;
  border-radius: 1px;
}

.activity-fallback {
  margin-top: 1rem;
  color: var(--ink-3);
  font-size: 0.82rem;
}

.contact h2 {
  font-size: 3.6rem;
  letter-spacing: 0;
}

.mobile-disclosure {
  display: contents;
}

.mobile-disclosure > summary {
  display: none;
}

/* Content is available even when animation APIs fail. */
.reveal,
.reveal.in {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  .section-head h2 { font-size: 4.2rem; }
  .hero h1 { font-size: 3.9rem; }
  .duality h3 { font-size: 2.7rem; }
  .job-role { font-size: 2.2rem; }
  .pub-title { font-size: 1.6rem; }
  .proj h3 { font-size: 3rem; }

  .next-chapter { display: none; }

  .section-head .eyebrow {
    grid-column: 1 / 4;
  }

  .section-head h2,
  .section-head p {
    grid-column: 4 / -1;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 7rem;
  }

  .hero-copy {
    display: contents;
  }

  .hero .tag { order: 1; }
  .hero h1 { order: 2; }
  .graph-stage {
    order: 3;
    width: min(100%, 36rem);
    max-width: none;
    margin: 1.5rem 0;
    aspect-ratio: 16 / 10;
  }
  .hero-sub { order: 4; }
  .hero-meta { order: 5; }
  .hero-actions { order: 6; }

  .job-body {
    grid-template-columns: 1fr;
  }

  .job ul {
    grid-column: 1;
    grid-row: auto;
    margin-top: 1.5rem;
  }

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

  .activity {
    grid-template-columns: 1fr;
    align-items: start;
  }
}

@media (max-width: 700px) {
  .section {
    padding-block: 4.25rem;
  }

  .nav-inner {
    min-height: 4rem;
  }

  .brand {
    font-size: 0.75rem;
  }

  .nav-cta {
    display: none;
  }

  .menu-toggle {
    display: block;
    margin-left: auto;
  }

  .nav-links {
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    display: grid;
    gap: 0;
    padding: 0 var(--gutter) 1rem;
    background: oklch(16% 0.018 255 / 0.98);
    border-bottom: 1px solid var(--line-soft);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out), visibility 180ms;
  }

  .nav-links a {
    display: flex;
    align-items: center;
    min-height: 48px;
    border-top: 1px solid var(--line-soft);
  }

  .menu-open .nav-links {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .menu-open .menu-toggle span:first-child {
    transform: translateY(3px) rotate(45deg);
  }

  .menu-open .menu-toggle span:last-child {
    transform: translateY(-3px) rotate(-45deg);
  }

  .section-head {
    display: block;
    margin-bottom: 2.5rem;
  }

  .section-head .eyebrow {
    margin: 0 0 1.5rem;
  }

  .section-head h2 {
    max-width: 100%;
    font-size: 3rem;
    overflow-wrap: break-word;
  }

  #experience .section-head {
    position: relative;
  }

  #experience .section-head .eyebrow {
    max-width: calc(100% - 5.5rem);
  }

  .experience-portrait {
    position: absolute;
    top: 0;
    right: 0;
    width: 4.5rem;
    margin: 0;
  }

  .hero h1 {
    font-size: 2.75rem;
  }

  .hero {
    gap: 0;
    padding-top: 5.5rem;
    padding-bottom: 3.5rem;
  }

  .hero .tag {
    margin-bottom: 1rem;
  }

  .hero-sub {
    margin-top: 1rem;
    font-size: 1rem;
  }

  .hero-meta {
    margin-top: 1.25rem;
  }

  .hero-actions {
    gap: 0.5rem;
    margin-top: 1.5rem;
  }

  .graph-stage {
    width: min(86vw, 20rem);
    margin: 0.75rem auto;
  }

  .graph-hud {
    top: 0;
    justify-content: flex-end;
    min-width: 0;
  }

  .graph-hud > span:first-child {
    display: none;
  }

  .graph-hud .status {
    min-width: 0;
    white-space: nowrap;
  }

  #work {
    padding-block: 3.75rem;
  }

  #work .section-head {
    margin-bottom: 2rem;
  }

  #work .section-head h2 {
    font-size: 2.6rem;
  }

  #work .section-head p {
    margin-top: 0.85rem;
  }

  .duality > div {
    padding: 1.5rem;
  }

  .duality h3 {
    font-size: 2rem;
    margin-bottom: 0.65rem;
  }

  .duality ul {
    gap: 0.45rem;
    margin-top: 0.85rem;
  }

  .duality li {
    font-size: 0.82rem;
  }

  .job-role { font-size: 2rem; }
  .proj h3 { font-size: 2.8rem; }
  .contact h2 { font-size: 3rem; }

  .hero-meta {
    display: grid;
    grid-template-columns: 1fr;
  }

  .chip + .chip::before {
    display: none;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }

  .graph-caption {
    display: none;
  }

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

  .duality .govern-side {
    margin-top: 0;
  }

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

  .job-body {
    grid-column: 1;
  }

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

  .pub-venue,
  .pub-venue.tier1 {
    text-align: left;
  }

  .mobile-disclosure {
    display: block;
  }

  .mobile-disclosure > summary {
    position: relative;
    display: grid;
    min-height: 56px;
    padding: 0.85rem 2.25rem 0.85rem 0;
    border-top: 1px solid currentColor;
    cursor: pointer;
    list-style: none;
  }

  .mobile-disclosure > summary::-webkit-details-marker {
    display: none;
  }

  .mobile-disclosure > summary::after {
    content: "+";
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    font-family: var(--f-mono);
    font-size: 1.25rem;
  }

  .mobile-disclosure[open] > summary::after {
    content: "−";
  }

  .mobile-disclosure > summary span {
    font-family: var(--f-editorial);
    font-size: 1.35rem;
  }

  .mobile-disclosure > summary small {
    margin-top: 0.2rem;
    color: var(--ink-3);
    font-family: var(--f-mono);
    font-size: 0.68rem;
  }

  .research-more > summary {
    border-color: color-mix(in oklch, var(--paper-ink), transparent 70%);
  }

  .research-more > summary small {
    color: var(--paper-muted);
  }

  #projects .section-head {
    margin-bottom: 2rem;
  }

  .proj-grid {
    gap: 1rem;
  }

  .proj,
  .proj:nth-child(2) {
    grid-column: 1 / -1;
    margin-top: 0;
    padding: 1.5rem;
  }

  .proj h3 {
    margin-block: 0.65rem 0.5rem;
    font-size: 2.25rem;
  }

  .proj .stack {
    margin-top: 1rem;
  }

  .project-visual {
    display: none;
  }

  .activity-intro h2 {
    font-size: 3.5rem;
  }

  #toolkit {
    padding-block: 4rem;
  }

  #toolkit .section-head {
    margin-bottom: 2.5rem;
  }

  #toolkit .section-head h2 {
    font-size: 2.8rem;
  }

  #toolkit .skillcat {
    padding-top: 1.25rem;
  }

  #toolkit .skillcat .tags span {
    padding-block: 0.15rem;
    line-height: 1.4;
  }
}

@media (max-width: 420px) {
  .section-head h2 { font-size: 2.75rem; }
  .hero h1 { font-size: 2.55rem; }
  #work .section-head h2 { font-size: 2.35rem; }
  .contact h2 { font-size: 2.8rem; }
  .next-chapter { font-size: 0.65rem; }
}

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