:root {
  --ink: #12201c;
  --ink-soft: #3a4a44;
  --paper: #f6f1e6;
  --paper-2: #efe7d6;
  --card: #fffdf8;
  --line: rgba(18, 32, 28, 0.12);
  --sea: #1c4a45;
  --sea-deep: #0d2421;
  --brass: #b07d2a;
  --brass-soft: #d7b56a;
  --moss: #3f6b52;
  --shadow: 0 18px 50px rgba(13, 36, 33, 0.08);
  --radius: 22px;
  --max: 1120px;
  --sans: "Figtree", "Segoe UI", sans-serif;
  --serif: "Fraunces", "Times New Roman", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 110% -10%, rgba(176, 125, 42, 0.12), transparent 50%),
    radial-gradient(900px 600px at -10% 20%, rgba(28, 74, 69, 0.08), transparent 45%),
    var(--paper);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(180deg, rgba(246, 241, 230, 0.92), rgba(246, 241, 230, 0.96)),
    url("../assets/cover.jpg");
  background-size: cover;
  background-position: center 40%;
  opacity: 0.22;
}

img,
svg {
  max-width: 100%;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--sea);
  color: #fff;
  padding: 0.55rem 0.8rem;
  z-index: 20;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(246, 241, 230, 0.84);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}

.mark {
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--sea);
  color: #f6f1e6;
  font-family: var(--serif);
  font-weight: 650;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 0.95rem;
}

.brand-text span {
  font-size: 0.75rem;
  color: var(--ink-soft);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 10px;
  padding: 0.45rem 0.65rem;
  font: inherit;
}

.nav-links {
  display: flex;
  gap: 1.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--sea);
}

.hero,
.section,
.site-footer {
  position: relative;
  z-index: 1;
}

.hero {
  max-width: none;
  margin: 0;
  padding: 0;
  display: grid;
  min-height: 34rem;
  color: #f6f1e6;
}

.hero-media,
.hero-copy {
  grid-area: 1 / 1;
}

.hero-media {
  position: relative;
  min-height: 34rem;
}

.hero-media img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 58%;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(13, 36, 33, 0.82) 0%, rgba(13, 36, 33, 0.48) 46%, rgba(13, 36, 33, 0.22) 100%);
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding: 4.2rem 1.25rem 3.2rem;
}

.hero .lede {
  color: rgba(246, 241, 230, 0.88);
}

.hero .chip {
  background: rgba(246, 241, 230, 0.12);
  border-color: rgba(246, 241, 230, 0.28);
  color: #f6f1e6;
}

.hero .btn-ghost {
  border-color: rgba(246, 241, 230, 0.35);
  color: #f6f1e6;
}

.icon-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

.icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.55rem;
  height: 2.55rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 253, 248, 0.7);
  text-decoration: none;
}

.icon-link svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: currentColor;
}

.hero .icon-link {
  border-color: rgba(246, 241, 230, 0.35);
  color: #f6f1e6;
  background: rgba(246, 241, 230, 0.12);
}

.site-footer .icon-link {
  border-color: rgba(232, 239, 233, 0.22);
  color: #d7b56a;
  background: transparent;
}

.hero .kicker {
  color: var(--brass-soft);
}

.hero-caption {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brass-soft);
  font-weight: 700;
}

.kicker {
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.74rem;
  color: var(--brass);
  font-weight: 700;
  margin: 0 0 0.8rem;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-optical-sizing: auto;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  margin: 0 0 0.85rem;
  font-weight: 600;
}

.lede {
  font-size: 1.18rem;
  color: var(--ink-soft);
  max-width: 38rem;
}

.meta-row,
.hero-actions,
.card-links,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.card-links {
  margin-top: 0.85rem;
}

.card-links a {
  color: var(--sea);
  font-weight: 650;
  text-underline-offset: 0.18em;
}

.chip,
.tag {
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.7);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  font-size: 0.82rem;
}

.chip {
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.72rem 1.05rem;
  font-weight: 650;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--sea);
  color: #f6f1e6;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.4rem 1.25rem 3.2rem;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.section-head p {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  max-width: 38rem;
}

.profile-grid,
.research-grid,
.patent-grid,
.repo-grid,
.pub-list,
.experience {
  display: grid;
  gap: 1rem;
}

.profile-grid {
  grid-template-columns: 1.4fr 0.8fr;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem;
  box-shadow: var(--shadow);
}

.education {
  margin: -0.35rem 0 1.15rem;
}

.education .kicker {
  margin: 0 0 0.35rem;
}

.education ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  line-height: 1.25;
}

.education li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 0;
  color: var(--ink-soft);
}

.education img {
  height: 2.55rem;
  width: auto;
  max-width: 8.2rem;
  object-fit: contain;
  object-position: left center;
  flex-shrink: 0;
  background: #fffdf8;
}

.education strong {
  color: var(--ink);
  font-weight: 700;
}

.facts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.facts li + li {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.facts span {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brass);
  font-weight: 700;
}

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

.card h3 {
  margin: 0.15rem 0 0.55rem;
  font-size: 1.35rem;
}

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

.status {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 0.22rem 0.55rem;
  margin-bottom: 0.55rem;
}

.status-granted {
  background: #dcecdd;
  color: #245534;
}

.status-pending {
  background: #f4e6c8;
  color: #6d4d12;
}

.muted {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

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

.pub-item {
  display: grid;
  grid-template-columns: 6.5rem 1fr auto;
  gap: 1rem;
  align-items: start;
}

.year {
  font-family: var(--serif);
  font-size: 1.3rem;
}

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

.job {
  display: grid;
  grid-template-columns: 10.5rem 1fr;
  gap: 1rem;
}

.job time {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.path-summary {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  margin: 0 0 1.4rem;
  padding: 0;
  font-size: 0.92rem;
  font-weight: 650;
}

.path-summary li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  padding: 0;
}

.path-summary li span {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.32rem 0.75rem 0.32rem 0.5rem;
}

.path-summary img {
  height: 1.45rem;
  width: auto;
  max-width: 5.6rem;
  object-fit: contain;
  object-position: left center;
  flex-shrink: 0;
}

.path-summary li:not(:last-child)::after {
  content: "→";
  color: var(--brass);
  font-weight: 700;
}

.path-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 0.4rem;
  border-left: 2px solid var(--line);
}

.path-list > li {
  position: relative;
  padding: 0 0 1.15rem 1.35rem;
}

.path-list > li:last-child {
  padding-bottom: 0;
}

.path-list > li::before {
  content: "";
  position: absolute;
  left: -0.42rem;
  top: 0.45rem;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--sea);
  box-shadow: 0 0 0 3px var(--paper);
}

.path-org {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}

.path-org img {
  height: 2.4rem;
  width: auto;
  max-width: 8.2rem;
  object-fit: contain;
  object-position: left center;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.path-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  margin-bottom: 0.35rem;
}

.path-meta time {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.path-list h3 {
  margin: 0 0 0.35rem;
  font-size: 1.2rem;
}

.path-list p {
  margin: 0;
  color: var(--ink-soft);
}

.contact-panel {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: center;
}

.site-footer {
  background: var(--sea-deep);
  color: #e8efe9;
  margin-top: 1rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.4rem 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-links a {
  color: #d7b56a;
}

@media (max-width: 860px) {
  .profile-grid,
  .research-grid,
  .patent-grid,
  .repo-grid,
  .pub-item,
  .job,
  .contact-panel,
  .footer-inner {
    grid-template-columns: 1fr;
    display: block;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    right: 1.25rem;
    top: 4.1rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 0.8rem 1rem;
    flex-direction: column;
    min-width: 12rem;
    box-shadow: var(--shadow);
  }

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

  .hero,
  .hero-media {
    min-height: 28rem;
  }

  .hero-copy {
    padding-top: 2.4rem;
  }

  .job time,
  .year {
    display: block;
    margin-bottom: 0.35rem;
  }

  .path-org img {
    height: 2rem;
    max-width: 6.4rem;
  }

  .section-head,
  .contact-panel,
  .footer-inner {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}