:root {
  --ink: #09111f;
  --muted: #5d6878;
  --paper: #f5f3ee;
  --white: #fff;
  --line: #d9d8d2;
  --blue: #6ee7f2;
  --violet: #8b7cf6;
  --lime: #c5f36d;
  --display: "Manrope", sans-serif;
  --body: "DM Sans", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.65;
}

.wrap {
  width: min(1160px, calc(100% - 48px));
  margin: auto;
}

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

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  background: #fff;
  padding: 10px 16px;
  z-index: 100;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 243, 238, 0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(9, 17, 31, 0.08);
}

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

.brand {
  font-family: var(--display);
  font-weight: 800;
  display: flex;
  gap: 12px;
  align-items: center;
  letter-spacing: -0.03em;
}

.brand span {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--white);
  font-size: 12px;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 14px;
  font-weight: 600;
}

.nav-links > a:not(.button):hover,
.social-row a:hover,
footer a:hover {
  color: #6655dd;
}

.menu-toggle {
  display: none;
  background: none;
  border: 0;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  background: var(--ink);
  color: #fff !important;
  border: 1px solid var(--ink);
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14px;
  transition: 0.2s;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px #09111f30;
}

.button-small {
  padding: 9px 17px;
}

.button-light {
  background: #fff;
  color: var(--ink) !important;
  border-color: #fff;
}

.hero {
  min-height: 750px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 80px;
  align-items: center;
  padding-block: 90px;
}

.eyebrow,
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 12px;
  font-weight: 700;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pulse {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #23c98d;
  box-shadow: 0 0 0 6px #23c98d20;
}

.hero h1 {
  font-family: var(--display);
  font-size: clamp(48px, 6vw, 82px);
  letter-spacing: -0.065em;
  line-height: 1.02;
  margin: 26px 0;
}

.hero h1 em {
  font-style: normal;
  color: #6655dd;
}

.lede {
  max-width: 680px;
  color: var(--muted);
  font-size: 20px;
}

.actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 36px 0;
}

.text-link {
  font-weight: 700;
}

.social-row {
  display: flex;
  gap: 24px;
  font-size: 14px;
  font-weight: 600;
}

.portrait-wrap {
  position: relative;
}

.portrait-card {
  position: relative;
  z-index: 2;
  transform: rotate(2deg);
  padding: 12px;
  background: #fff;
  border-radius: 220px 220px 24px 24px;
  box-shadow: 0 30px 70px #19213b25;
}

.portrait-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1/1.15;
  object-fit: cover;
  object-position: top;
  border-radius: 210px 210px 18px 18px;
  filter: saturate(0.85);
}

.portrait-label {
  position: absolute;
  right: -20px;
  bottom: 35px;
  background: var(--lime);
  padding: 12px 18px;
  border-radius: 12px;
  transform: rotate(-2deg);
  font-size: 13px;
  line-height: 1.4;
}

.orbit {
  position: absolute;
  border: 1px solid #6655dd50;
  border-radius: 50%;
}

.orbit-one {
  width: 110%;
  aspect-ratio: 1;
  left: -16%;
  top: -8%;
}

.orbit-two {
  width: 85%;
  aspect-ratio: 1;
  right: -14%;
  bottom: -9%;
}

.signal {
  background: var(--ink);
  color: #fff;
  padding: 23px 0;
}

.signal-grid {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.signal p {
  color: var(--blue);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.signal span {
  font-weight: 600;
}

.section {
  padding-block: 120px;
}

.section-heading {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 80px;
  align-items: end;
  margin-bottom: 70px;
}

.section-heading h2,
.cta h2,
.page-hero h1 {
  font-family: var(--display);
  font-size: clamp(40px, 5vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.055em;
  margin: 15px 0 0;
}

.section-heading > p {
  color: var(--muted);
  max-width: 480px;
}

.kicker {
  color: #6655dd;
}

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

.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr 60px;
  gap: 40px;
  padding: 38px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-date,
.company {
  color: #6655dd;
  font-weight: 700;
  font-size: 14px;
}

.timeline-item h3 {
  font-family: var(--display);
  font-size: 28px;
  margin: 0;
}

.timeline-item p {
  max-width: 670px;
  color: var(--muted);
}

.timeline-item .company {
  margin: 3px 0;
}

.timeline-item .index {
  font-family: var(--display);
  font-size: 13px;
  color: #999;
}

.section-dark {
  background: var(--ink);
  color: #fff;
}

.section-dark .section-heading > p {
  color: #aeb7c5;
}

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

.feature-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.75fr;
  gap: 18px;
  margin-bottom: 38px;
}

.feature-card {
  border: 1px solid #ffffff22;
  min-height: 300px;
  padding: 32px;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
}

.feature-card.accent {
  background: linear-gradient(135deg, var(--violet), #5444c7);
  border: 0;
}

.feature-card .tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.feature-card h3 {
  font-family: var(--display);
  font-size: 38px;
  margin: 40px 0 8px;
}

.feature-card > p {
  color: #ccd2dc;
}

.feature-card.accent > p {
  color: #fff;
}

.feature-card a {
  margin-top: auto;
  font-weight: 700;
}

.stats {
  justify-content: space-between;
  background: #101d30;
}

.stats div {
  display: flex;
  align-items: end;
  gap: 10px;
  border-bottom: 1px solid #ffffff1b;
  padding-bottom: 12px;
}

.stats div:last-child {
  border: 0;
}

.stats strong {
  font-family: var(--display);
  font-size: 35px;
}

.stats span {
  color: #aeb7c5;
  font-size: 12px;
}

.education-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.edu-card {
  background: #fff;
  padding: 32px;
  border-radius: 18px;
  border: 1px solid #e5e3dd;
  min-height: 270px;
}

.edu-card > span {
  color: #6655dd;
  font-weight: 700;
  font-size: 12px;
}

.edu-card h3 {
  font-family: var(--display);
  font-size: 23px;
  line-height: 1.25;
  margin: 45px 0 14px;
}

.edu-card p {
  margin: 0;
  font-weight: 600;
}

.edu-card small {
  display: block;
  margin-top: 16px;
  color: var(--muted);
}

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

.skill-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.skill-cloud span {
  border: 1px solid #bbb9b2;
  border-radius: 999px;
  padding: 12px 20px;
  background: #fff;
}

.cta {
  background: linear-gradient(130deg, #6e5ce3, #7a67f3 45%, #3c91ba);
  color: white;
  text-align: center;
  padding: 105px 0;
}

.cta .kicker {
  color: var(--lime);
}

.cta h2 {
  margin-bottom: 35px;
}

footer {
  background: #060c15;
  color: #fff;
  padding: 60px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 80px;
  align-items: center;
}

.footer-grid p {
  font-size: 13px;
  color: #8e98a7;
}

.footer-grid > div:nth-child(2) {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.page-hero {
  padding: 110px 0 75px;
}

.page-hero p {
  max-width: 720px;
  color: var(--muted);
  font-size: 20px;
}

.paper-list {
  padding-bottom: 120px;
}

.paper-card {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 35px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.paper-card:last-child {
  border-bottom: 1px solid var(--line);
}

.paper-year {
  font-family: var(--display);
  font-size: 30px;
  color: #6655dd;
}

.paper-card h2 {
  font-family: var(--display);
  font-size: 28px;
  line-height: 1.2;
  margin: 0 0 12px;
}

.paper-meta {
  font-size: 14px;
  font-weight: 600;
}

.paper-abstract {
  max-width: 740px;
  color: var(--muted);
}

.paper-type {
  align-self: start;
  background: #e6e2ff;
  color: #5746bf;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.paper-links {
  display: flex;
  gap: 18px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 700;
}

.source-note {
  background: #ece9e1;
  padding: 18px 22px;
  border-radius: 12px;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 55px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.7s,
    transform 0.7s;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 850px) {
  .wrap {
    width: min(100% - 32px, 1160px);
  }

  .menu-toggle {
    display: grid;
    gap: 5px;
    padding: 12px;
  }

  .menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--ink);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--paper);
    padding: 24px;
    flex-direction: column;
    border-bottom: 1px solid var(--line);
  }

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

  .hero {
    grid-template-columns: 1fr;
    padding-block: 60px;
    gap: 55px;
  }

  .portrait-wrap {
    max-width: 430px;
    margin: auto;
  }

  .signal-grid {
    overflow: auto;
    justify-content: flex-start;
  }

  .signal span {
    white-space: nowrap;
  }

  .section {
    padding-block: 80px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 15px;
    margin-bottom: 45px;
  }

  .feature-grid,
  .education-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .timeline-item .index {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .paper-card {
    grid-template-columns: 1fr;
  }

  .paper-type {
    justify-self: start;
  }

  .social-row {
    flex-wrap: wrap;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}