:root {
  --navy: #07111f;
  --navy-light: #0d1b2d;
  --panel: #11233a;
  --blue: #2f80ed;
  --cyan: #37c6f4;
  --text: #152033;
  --muted: #657286;
  --light: #f5f8fc;
  --white: #ffffff;
  --border: #dde5ef;
  --shadow: 0 18px 45px rgba(16, 37, 65, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--white);
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 17, 31, 0.94);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

.nav-container {
  width: min(1180px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 34px;
}

.logo {
  margin-right: auto;
  color: var(--white);
  font-size: 1.35rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -0.04em;
}

.logo span {
  color: var(--cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: #c4d1e0;
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--white);
}

.nav-cv {
  padding: 9px 16px;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.nav-cv:hover {
  background: var(--white);
  color: var(--navy);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 720px;
  display: flex;
  align-items: center;
  background:
    radial-gradient(circle at 76% 26%, rgba(55, 198, 244, 0.18), transparent 23%),
    linear-gradient(135deg, #06101d 0%, #0a1728 52%, #0d2038 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.24;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 90%);
}

.hero-container {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 90px 0;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(290px, 0.65fr);
  gap: 90px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--cyan);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  color: var(--white);
  font-size: clamp(3.5rem, 7vw, 6.4rem);
  line-height: 0.95;
  letter-spacing: -0.065em;
}

.hero h2 {
  max-width: 760px;
  margin: 24px 0 0;
  color: #dce8f5;
  font-size: clamp(1.55rem, 3vw, 2.55rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.hero h2 span {
  color: var(--cyan);
}

.hero-description {
  max-width: 720px;
  margin: 28px 0 0;
  color: #aebdd0;
  font-size: 1.08rem;
}

.research-tags {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.research-tags span {
  padding: 7px 12px;
  color: #cce7f7;
  background: rgba(55, 198, 244, 0.08);
  border: 1px solid rgba(55, 198, 244, 0.19);
  border-radius: 999px;
  font-size: 0.8rem;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 9px;
  font-weight: 750;
  text-decoration: none;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--navy);
  background: var(--cyan);
}

.button-secondary {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.button-secondary:hover {
  border-color: var(--white);
}

.social-links {
  margin-top: 26px;
  display: flex;
  gap: 22px;
}

.social-links a {
  color: #99aabd;
  font-size: 0.9rem;
  text-decoration: none;
}

.social-links a:hover {
  color: var(--white);
}

.hero-image-wrapper {
  position: relative;
}

.image-frame {
  padding: 10px;
  background: linear-gradient(
    145deg,
    rgba(55, 198, 244, 0.85),
    rgba(47, 128, 237, 0.12)
  );
  border-radius: 24px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

.profile-image {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center top;
  border-radius: 17px;
}

.status-card {
  position: absolute;
  left: -52px;
  bottom: -28px;
  width: 285px;
  padding: 17px 18px;
  display: flex;
  gap: 12px;
  color: var(--white);
  background: rgba(15, 31, 51, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.status-dot {
  width: 10px;
  height: 10px;
  margin-top: 7px;
  flex: 0 0 auto;
  background: #54e4a9;
  border-radius: 50%;
  box-shadow: 0 0 0 6px rgba(84, 228, 169, 0.1);
}

.status-card strong {
  font-size: 0.9rem;
}

.status-card p {
  margin: 2px 0 0;
  color: #9fb0c3;
  font-size: 0.8rem;
  line-height: 1.45;
}

.section {
  padding: 100px 0;
}

.section-container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.light-section {
  background: var(--white);
}

.grey-section {
  background: var(--light);
}

.dark-section {
  color: var(--white);
  background: var(--navy);
}

.two-column {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 90px;
}

.section-label {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.light-label {
  color: var(--cyan);
}

.section-title {
  max-width: 680px;
  margin: 0;
  font-size: clamp(2.15rem, 4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.048em;
}

.light-title {
  color: var(--white);
}

.about-copy {
  color: #46546a;
  font-size: 1.05rem;
}

.about-copy p:first-child {
  margin-top: 0;
}

.section-heading-row {
  margin-bottom: 48px;
  display: flex;
  justify-content: space-between;
  gap: 60px;
  align-items: flex-end;
}

.section-intro {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
}

.light-intro {
  color: #94a8bf;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.research-card {
  min-height: 320px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 12px 35px rgba(13, 31, 53, 0.06);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease;
}

.research-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.card-number {
  margin-bottom: 44px;
  color: var(--blue);
  font-family: monospace;
  font-size: 0.85rem;
  font-weight: 700;
}

.research-card h3 {
  margin: 0 0 14px;
  font-size: 1.35rem;
  letter-spacing: -0.025em;
}

.research-card p {
  margin: 0;
  color: var(--muted);
}

.card-footer {
  margin-top: auto;
  padding-top: 28px;
  color: #8794a7;
  font-size: 0.78rem;
}

.publication-list {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.publication-item {
  padding: 42px 0;
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 38px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.publication-year {
  color: var(--cyan);
  font-family: monospace;
  font-size: 0.9rem;
}

.publication-content {
  max-width: 850px;
}

.publication-type {
  margin: 0 0 10px;
  color: #8195ad;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.publication-content h3 {
  margin: 0;
  color: var(--white);
  font-size: 1.35rem;
  line-height: 1.35;
}

.publication-authors,
.publication-venue {
  margin: 9px 0 0;
  color: #b1c0d0;
}

.publication-content > p:last-of-type {
  color: #95a8bc;
}

.publication-links {
  margin-top: 17px;
  display: flex;
  gap: 14px;
}

.publication-links a {
  padding: 6px 11px;
  color: var(--cyan);
  border: 1px solid rgba(55, 198, 244, 0.24);
  border-radius: 7px;
  font-size: 0.8rem;
  text-decoration: none;
}

.publication-links a:hover {
  color: var(--navy);
  background: var(--cyan);
}

.timeline {
  margin-top: 30px;
}

.timeline-item {
  padding: 28px 0;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 32px;
  border-bottom: 1px solid var(--border);
}

.timeline-date {
  color: var(--blue);
  font-family: monospace;
  font-weight: 800;
}

.timeline-item h3 {
  margin: 0 0 5px;
  font-size: 1.18rem;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
}

.contact-section {
  padding: 90px 0;
  color: var(--white);
  background:
    radial-gradient(circle at 90% 10%, rgba(55, 198, 244, 0.18), transparent 24%),
    linear-gradient(135deg, #0d1b2d, #0a1525);
}

.contact-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.contact-container h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.15rem, 4vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

.contact-container p {
  max-width: 720px;
  color: #a6b6c8;
}

.contact-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: stretch;
}

.button-light {
  color: var(--navy);
  background: var(--white);
}

.button-outline-light {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.26);
}

footer {
  color: #8494a7;
  background: #050b13;
}

.footer-container {
  width: min(1120px, calc(100% - 40px));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-container p {
  margin: 0;
}

.footer-container div {
  display: flex;
  gap: 20px;
}

.footer-container a {
  color: #8494a7;
  text-decoration: none;
}

.footer-container a:hover {
  color: var(--white);
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero {
    min-height: auto;
  }

  .hero-container {
    padding: 72px 0 100px;
    grid-template-columns: 1fr;
  }

  .hero-image-wrapper {
    width: min(420px, 100%);
  }

  .status-card {
    left: 18px;
  }

  .two-column,
  .contact-container {
    grid-template-columns: 1fr;
    gap: 36px;
  }

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

  .research-card {
    min-height: 260px;
  }

  .section-heading-row {
    display: block;
  }

  .section-intro {
    margin-top: 20px;
  }
}

@media (max-width: 620px) {
  .nav-container {
    min-height: 64px;
  }

  .hero-container,
  .section-container,
  .footer-container {
    width: min(100% - 28px, 1120px);
  }

  .hero h1 {
    font-size: 3.4rem;
  }

  .hero h2 {
    font-size: 1.65rem;
  }

  .section {
    padding: 72px 0;
  }

  .publication-item,
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .status-card {
    position: relative;
    left: auto;
    bottom: auto;
    width: 100%;
    margin-top: 14px;
  }

  .hero-actions,
  .social-links {
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

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

  .footer-container {
    padding: 24px 0;
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}