:root {
  color-scheme: dark;
  --bg: #071120;
  --bg-soft: rgba(7, 17, 32, 0.88);
  --surface: rgba(14, 29, 52, 0.88);
  --surface-strong: rgba(19, 39, 68, 0.94);
  --text: #f7f9ff;
  --muted: #bdc8da;
  --subtle: #91a1b9;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --accent-ink: #06202e;
  --border: rgba(189, 200, 218, 0.25);
  --border-strong: rgba(125, 211, 252, 0.62);
  --focus: #fbbf24;
  --max-width: 72rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius: 1rem;
}

body.light-mode {
  color-scheme: light;
  --bg: #f4f7fb;
  --bg-soft: rgba(244, 247, 251, 0.9);
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: rgba(255, 255, 255, 0.97);
  --text: #102033;
  --muted: #415269;
  --subtle: #5b6c82;
  --accent: #036984;
  --accent-strong: #07546a;
  --accent-ink: #ffffff;
  --border: rgba(16, 32, 51, 0.2);
  --border-strong: rgba(3, 105, 132, 0.6);
  --focus: #9a5400;
}

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

html {
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 15% 8%, rgba(56, 189, 248, 0.13), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: "Onest", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body.light-mode {
  background:
    radial-gradient(circle at 15% 8%, rgba(3, 105, 132, 0.1), transparent 30rem),
    var(--bg);
}

button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: "Sora", "Onest", sans-serif;
  text-wrap: balance;
}

h2 {
  margin-bottom: 0.85rem;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

h3 {
  line-height: 1.25;
  letter-spacing: -0.02em;
}

section[id] {
  scroll-margin-top: 6rem;
}

:focus-visible {
  outline: 3px solid var(--focus);
  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;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--text);
  color: var(--bg);
  font-weight: 700;
  transform: translateY(-150%);
}

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

.site-loader {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 28% 22%, rgba(56, 189, 248, 0.14), transparent 24rem),
    var(--bg);
  animation: loader-fallback-dismiss 300ms ease 2900ms forwards;
}

.site-loader.is-complete {
  opacity: 0;
  pointer-events: none;
  animation: none;
  transition: opacity 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.loader-inner {
  width: min(42rem, calc(100% - 2 * var(--gutter)));
}

.loader-logo {
  width: 4.5rem;
  height: 4.5rem;
  margin-bottom: 2.5rem;
  object-fit: contain;
}

.loader-title {
  max-width: 18ch;
  margin-bottom: 2.75rem;
  font-family: "Sora", "Onest", sans-serif;
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.loader-progress {
  position: relative;
  height: 0.55rem;
  overflow: visible;
  background: var(--border);
}

.loader-fill {
  position: absolute;
  inset: 0;
  background: var(--accent);
  box-shadow: 0 0.35rem 1.25rem rgba(125, 211, 252, 0.34);
  transform: scaleX(var(--loader-progress, 0));
  transform-origin: left;
}

.loader-tick {
  position: absolute;
  top: -0.24rem;
  width: 1px;
  height: 1.05rem;
  background: var(--text);
  opacity: 0.45;
}

.loader-tick-35 {
  left: 35%;
}

.loader-tick-57 {
  left: 57%;
}

.loader-tick-100 {
  right: 0;
}

.loader-meta {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 600;
}

#loader-percent {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

@keyframes loader-fallback-dismiss {
  to {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
  }
}

#bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  max-width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.62;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100%, var(--max-width));
  min-height: 4.75rem;
  margin: 0 auto;
  padding: 0.65rem var(--gutter);
}

.logo {
  display: inline-flex;
  flex: 0 0 auto;
  border-radius: 50%;
}

#logo-img {
  width: 3.25rem;
  height: 3.25rem;
  object-fit: contain;
}

.header-controls,
.site-header nav {
  display: flex;
  align-items: center;
}

.header-controls {
  gap: 1.25rem;
}

.site-header nav {
  gap: clamp(0.9rem, 2.5vw, 1.8rem);
}

.site-header nav a {
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  text-underline-offset: 0.3rem;
}

.site-header nav a:hover {
  color: var(--text);
  text-decoration: underline;
}

.mode-switch-btn {
  display: inline-grid;
  width: 2.875rem;
  height: 2.875rem;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.mode-switch-btn:hover {
  border-color: var(--border-strong);
}

.mode-switch-btn .iconify {
  font-size: 1.25rem;
}

.hero {
  display: flex;
  align-items: center;
  min-height: min(46rem, calc(100svh - 4.75rem));
  padding: clamp(5rem, 12vw, 9rem) var(--gutter);
}

.hero-copy {
  position: relative;
  width: 100%;
  max-width: var(--max-width);
  min-width: 0;
  margin: 0 auto;
}

.hero-signal {
  position: absolute;
  top: -1.5rem;
  left: 0;
  width: min(24rem, 72vw);
  height: 1px;
  overflow: visible;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transform-origin: left;
  animation: signal-scan 3000ms cubic-bezier(0.16, 1, 0.3, 1) 2950ms both;
}

.hero-signal::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0.25rem 1rem rgba(125, 211, 252, 0.55);
  content: "";
  transform: translate(50%, -50%);
}

.hero h1 {
  max-width: 12ch;
  margin-bottom: 1.4rem;
  font-size: clamp(3rem, 8vw, 5.75rem);
  line-height: 0.98;
  letter-spacing: -0.038em;
  animation: signal-resolve 700ms cubic-bezier(0.16, 1, 0.3, 1) 2700ms both;
}

@keyframes signal-scan {
  0% {
    opacity: 0;
    transform: scaleX(0.06);
  }
  28% {
    opacity: 1;
  }
  82% {
    opacity: 1;
    transform: scaleX(1);
  }
  100% {
    opacity: 0;
    transform: scaleX(1);
  }
}

@keyframes signal-resolve {
  from {
    clip-path: inset(0 0 100% 0);
    filter: blur(7px);
  }
  to {
    clip-path: inset(0);
    filter: blur(0);
  }
}

.greeting {
  position: relative;
  display: inline-block;
  width: 10.5ch;
  height: 1.05em;
  overflow: hidden;
  vertical-align: -0.08em;
}

.greeting span {
  position: absolute;
  inset: 0 auto auto 0;
  opacity: 0;
  transform: translateY(95%);
  transition: transform 450ms cubic-bezier(0.22, 1, 0.36, 1), opacity 300ms ease;
}

.greeting span.active {
  opacity: 1;
  transform: translateY(0);
}

.greeting span.exit {
  opacity: 0;
  transform: translateY(-95%);
}

.hero-lead {
  max-width: 64ch;
  margin-bottom: 0.85rem;
  color: var(--text);
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  line-height: 1.45;
}

.hero-context {
  max-width: 67ch;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions,
.section-action,
.about-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.action-btn,
.text-link,
.project-link,
.publication a,
.about-links a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  text-decoration: none;
}

.action-btn {
  justify-content: center;
  padding: 0.68rem 1rem;
  border: 1px solid var(--border-strong);
  border-radius: 0.7rem;
  background: var(--surface);
  color: var(--text);
}

.action-btn:hover {
  border-color: var(--accent);
  background: var(--surface-strong);
}

.action-btn-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.action-btn-primary:hover {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.text-link,
.project-link,
.publication a,
.about-links a {
  color: var(--accent);
  text-underline-offset: 0.25rem;
}

.text-link:hover,
.project-link:hover,
.publication a:hover,
.about-links a:hover {
  text-decoration: underline;
}

.section-shell {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: clamp(5rem, 10vw, 8rem) var(--gutter);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(17rem, 0.65fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-heading h2,
.section-heading p {
  margin-bottom: 0;
}

.section-heading p {
  max-width: 44ch;
  color: var(--muted);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.project-card {
  position: relative;
  display: flex;
  min-height: 27rem;
  flex-direction: column;
  padding: clamp(1.4rem, 3vw, 2.25rem);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: blur(12px);
  overflow: hidden;
}

.project-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  content: "";
  opacity: 0;
  transform: scaleX(0.25);
  transition: opacity 240ms ease, transform 360ms cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover::before,
.project-card:focus-within::before {
  opacity: 0.9;
  transform: scaleX(1);
}

.project-card-featured {
  border-color: var(--border-strong);
  background: var(--surface-strong);
}

.project-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.4rem;
  color: var(--subtle);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.project-meta time {
  text-align: right;
}

.project-card h3 {
  max-width: 24ch;
  margin-bottom: 1rem;
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
}

.project-brief {
  max-width: 62ch;
  margin-bottom: 1.5rem;
  color: var(--muted);
}

.project-proof,
.experience-entry > ul {
  display: grid;
  gap: 0.65rem;
  margin: 0 0 1.75rem;
  padding-left: 1.2rem;
}

.project-proof li::marker,
.experience-entry > ul li::marker {
  color: var(--accent);
}

.project-proof strong {
  color: var(--text);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
}

.project-tags span {
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.project-footer {
  display: grid;
  gap: 1.1rem;
  margin-top: auto;
}

.project-footer .project-tags {
  margin-top: 0;
}

.project-link {
  width: fit-content;
}

.project-link .iconify,
.text-link .iconify,
.about-links .iconify,
.contact .iconify {
  transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

.project-link:hover .iconify,
.text-link:hover .iconify,
.about-links a:hover .iconify,
.contact .action-btn:hover .iconify {
  transform: translate(0.18rem, -0.18rem);
}

.section-action {
  justify-content: flex-end;
  margin-top: 1.25rem;
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(2rem, 5vw, 5rem);
}

.capability-core {
  padding: 2rem 0 2.25rem;
  border-top: 1px solid var(--border);
}

.capability-core h3 {
  margin-bottom: 1.15rem;
  font-size: 1.25rem;
}

.capability-tags {
  margin-top: 0;
}

.capability-more {
  margin-top: 3rem;
}

.capability-more > h3 {
  margin-bottom: 1rem;
  color: var(--muted);
  font-size: 1rem;
}

.capability-more-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(2rem, 5vw, 5rem);
}

.capability-disclosure {
  border-top: 1px solid var(--border);
}

.capability-disclosure summary,
.credentials summary {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  cursor: pointer;
  font-family: "Sora", "Onest", sans-serif;
  font-size: 1.12rem;
  font-weight: 700;
  list-style: none;
}

.capability-disclosure summary::-webkit-details-marker,
.credentials summary::-webkit-details-marker {
  display: none;
}

.disclosure-indicator {
  position: relative;
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  color: var(--accent);
}

.disclosure-indicator::before,
.disclosure-indicator::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.875rem;
  height: 2px;
  background: currentColor;
  content: "";
  transform: translate(-50%, -50%);
  transition: transform 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

.disclosure-indicator::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

details[open] > summary .disclosure-indicator::after {
  transform: translate(-50%, -50%) rotate(0);
}

.capability-disclosure .disclosure-body {
  overflow: hidden;
}

.capability-disclosure .capability-tags {
  margin: -0.25rem 2.5rem 1.75rem 0;
}

.experience-list {
  border-top: 1px solid var(--border);
}

.experience-entry {
  display: grid;
  grid-template-columns: minmax(15rem, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(2rem, 6vw, 6rem);
  padding: 2.25rem 0;
  border-bottom: 1px solid var(--border);
}

.experience-entry h3 {
  margin-bottom: 0.45rem;
  font-size: 1.3rem;
}

.experience-meta p,
.experience-meta time {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--subtle);
  font-size: 0.92rem;
}

.experience-entry > ul {
  margin-bottom: 0;
  color: var(--muted);
}

.research-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(17rem, 0.75fr);
  gap: 1.25rem;
  margin-top: 3rem;
}

.research-column,
.credentials {
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.research-column > h3 {
  margin-bottom: 1.5rem;
  font-size: 1.35rem;
}

.publication + .publication {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.publication p {
  max-width: 58ch;
  margin-bottom: 0.4rem;
  color: var(--muted);
}

.credentials {
  align-self: start;
}

.credentials ul {
  display: grid;
  gap: 0.85rem;
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.credentials .disclosure-body {
  overflow: hidden;
  padding-bottom: 0.4rem;
}

.credentials a {
  color: var(--muted);
  text-underline-offset: 0.2rem;
}

.credentials a:hover {
  color: var(--text);
}

.about {
  display: grid;
  grid-template-columns: minmax(14rem, 0.65fr) minmax(0, 1.35fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: center;
}

.about picture {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  border-radius: var(--radius);
  box-shadow: 0 1.25rem 3.5rem rgba(1, 9, 24, 0.22);
}

.about-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 45%;
}

.about-copy h2 {
  max-width: 16ch;
}

.about-copy > p {
  max-width: 64ch;
  margin-bottom: 1.5rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.contact {
  display: flex;
  width: min(calc(100% - 2 * var(--gutter)), calc(var(--max-width) - 2 * var(--gutter)));
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin: clamp(3rem, 7vw, 6rem) auto;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface-strong);
}

.contact h2 {
  margin-bottom: 0.5rem;
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.contact p {
  max-width: 52ch;
  margin-bottom: 0;
  color: var(--muted);
}

.site-footer {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 2rem var(--gutter) 3rem;
  color: var(--subtle);
  font-size: 0.85rem;
}

.site-footer p {
  margin-bottom: 0;
}

@media (max-width: 52rem) {
  .section-heading,
  .experience-entry,
  .research-grid,
  .about {
    grid-template-columns: 1fr;
  }

  .section-heading {
    gap: 0.4rem;
  }

  .projects-grid,
  .capabilities-grid,
  .capability-more-grid {
    grid-template-columns: 1fr;
  }

  .project-card {
    min-height: auto;
  }

  .experience-entry {
    gap: 1.4rem;
  }

  .about {
    max-width: 42rem;
  }

  .about picture {
    max-width: 21rem;
  }
}

@media (max-width: 42rem) {
  .header-inner {
    align-items: flex-start;
  }

  #logo-img {
    width: 2.875rem;
    height: 2.875rem;
  }

  .header-controls {
    gap: 0.65rem;
  }

  .site-header nav {
    max-width: 13.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.35rem 0.9rem;
  }

  .site-header nav a {
    min-height: 2.25rem;
    display: inline-flex;
    align-items: center;
    font-size: 0.84rem;
  }

  .hero {
    min-height: calc(100svh - 4.75rem);
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(2.8rem, 14vw, 4.3rem);
  }

  .greeting {
    display: block;
    width: 100%;
  }

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

  .hero-actions .action-btn {
    width: 100%;
  }

  .hero-actions .text-link {
    justify-content: center;
  }

  .project-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.25rem;
  }

  .project-meta time {
    text-align: left;
  }

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

  .contact .action-btn {
    width: 100%;
  }
}

@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;
  }

  .site-loader,
  .hero-signal {
    display: none;
  }

  .hero h1 {
    animation: none;
  }
}