:root {
  --navy-950: #031329;
  --navy-900: #061f43;
  --navy-850: #082953;
  --navy-800: #0b3568;
  --blue-600: #1559aa;
  --blue-500: #2474d2;
  --cyan-500: #0a91b7;
  --amber-500: #f5b62e;
  --amber-400: #ffc84f;
  --amber-200: #ffe6a0;
  --ink: #10213e;
  --muted: #5b6780;
  --line: #e3e8f0;
  --surface: #ffffff;
  --surface-soft: #f7f9fc;
  --shadow: 0 18px 45px rgba(8, 35, 76, 0.10);
  --shadow-soft: 0 9px 24px rgba(8, 35, 76, 0.08);
  --radius-xl: 26px;
  --radius-lg: 18px;
  --radius-md: 13px;
  --container: 1180px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface-soft);
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
input,
textarea {
  font: inherit;
}

svg {
  width: 1.15em;
  height: 1.15em;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  left: 12px;
  top: -50px;
  z-index: 9999;
  padding: 10px 16px;
  color: #fff;
  background: var(--navy-900);
  border-radius: 8px;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  color: #fff;
  background: rgba(4, 24, 52, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  min-height: 78px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
}

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

.brand-name {
  font-weight: 800;
  font-size: 1.04rem;
  letter-spacing: 0.01em;
}

.brand-tagline {
  margin-top: 5px;
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.72);
}

.main-nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav a {
  position: relative;
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.86);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -7px;
  height: 2px;
  background: var(--amber-400);
  transition: right 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: #fff;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  right: 0;
}

.nav-toggle,
.nav-toggle-label {
  display: none;
}

.btn {
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-accent {
  color: #10213e;
  background: linear-gradient(135deg, var(--amber-400), var(--amber-500));
  box-shadow: 0 9px 22px rgba(245, 182, 46, 0.22);
}

.btn-accent:hover {
  box-shadow: 0 12px 28px rgba(245, 182, 46, 0.34);
}

.btn-outline {
  color: #fff;
  background: rgba(255,255,255,0.04);
  border-color: rgba(255, 200, 79, 0.72);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.09);
}

.btn-dark {
  color: #fff;
  background: var(--navy-900);
}

.full-width {
  width: 100%;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 600px;
  display: flex;
  align-items: center;
  color: #fff;
  background:
    radial-gradient(circle at 17% 26%, rgba(18, 103, 192, 0.30), transparent 27%),
    radial-gradient(circle at 83% 44%, rgba(21, 89, 170, 0.26), transparent 25%),
    linear-gradient(112deg, #03152f 0%, #062a59 54%, #041c3c 100%);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(1px);
  pointer-events: none;
}

.hero::before {
  width: 500px;
  height: 500px;
  left: -260px;
  top: 50px;
  border: 1px solid rgba(40, 128, 218, 0.22);
  box-shadow: 0 0 0 60px rgba(40, 128, 218, 0.04), 0 0 0 120px rgba(40, 128, 218, 0.03);
}

.hero::after {
  width: 420px;
  height: 420px;
  right: -180px;
  top: 80px;
  border: 1px solid rgba(40, 128, 218, 0.18);
  box-shadow: 0 0 0 55px rgba(40, 128, 218, 0.04), 0 0 0 105px rgba(40, 128, 218, 0.03);
}

.hero-grid-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.25;
  background-image:
    linear-gradient(rgba(34, 109, 190, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 109, 190, 0.12) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to right, transparent, #000 20%, #000 80%, transparent);
}

.hero-layout {
  position: relative;
  z-index: 2;
  padding-block: 78px 72px;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(340px, 0.88fr);
  align-items: center;
  gap: 64px;
}

.eyebrow,
.section-heading > span,
.section-kicker p,
.mini-label {
  display: inline-block;
  color: var(--blue-600);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--amber-400);
  margin-bottom: 16px;
}

.hero h1 {
  margin: 0;
  line-height: 0.98;
  font-family: "Playfair Display", Georgia, serif;
}

.hero h1 span {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(2rem, 4.4vw, 4.25rem);
  color: #fff;
}

.hero h1 strong {
  display: block;
  color: var(--amber-400);
  font-family: "Inter", sans-serif;
  font-size: clamp(3rem, 6.6vw, 6.25rem);
  letter-spacing: -0.045em;
}

.hero-role {
  margin: 22px 0 10px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: clamp(1rem, 1.7vw, 1.36rem);
  font-weight: 700;
}

.hero-role i {
  width: 1px;
  height: 18px;
  background: rgba(255,255,255,0.5);
}

.hero-topics {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 11px;
  color: rgba(255,255,255,0.84);
  font-size: 0.92rem;
}

.hero-topics b {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber-400);
}

.hero-intro {
  max-width: 650px;
  margin: 18px 0 0;
  color: rgba(255,255,255,0.76);
  font-size: 1rem;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-visual {
  position: relative;
  max-width: 440px;
  justify-self: end;
}

.portrait-frame {
  position: relative;
  padding: 10px;
  border-radius: 32px;
  background: linear-gradient(145deg, rgba(255,255,255,0.24), rgba(255,255,255,0.04));
  box-shadow: 0 28px 70px rgba(0,0,0,0.34);
}

.portrait-frame::before {
  content: "";
  position: absolute;
  inset: -20px 28px 20px -18px;
  z-index: -1;
  border: 1px solid rgba(255, 200, 79, 0.35);
  border-radius: 34px;
}

.portrait-frame img {
  width: 100%;
  aspect-ratio: 0.94;
  object-fit: cover;
  border-radius: 24px;
}

.floating-badge {
  position: absolute;
  padding: 12px 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 13px;
  background: rgba(3, 22, 48, 0.88);
  box-shadow: 0 16px 40px rgba(0,0,0,0.26);
  backdrop-filter: blur(12px);
  font-size: 0.78rem;
}

.floating-badge svg {
  color: var(--amber-400);
  width: 25px;
  height: 25px;
}

.floating-badge span {
  display: grid;
}

.floating-badge strong {
  color: #fff;
  font-size: 1rem;
}

.badge-one {
  left: -42px;
  bottom: 48px;
}

.badge-two {
  right: -28px;
  top: 42px;
}

.section-pad {
  padding-block: 84px;
}

.surface-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.overview {
  background:
    linear-gradient(rgba(15, 62, 120, 0.025), rgba(15, 62, 120, 0.025)),
    var(--surface-soft);
}

.overview-grid {
  display: grid;
  grid-template-columns: 1.08fr 1.92fr;
  align-items: stretch;
  gap: 26px;
}

.about-card {
  padding: 28px;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.section-kicker p {
  margin: 0 0 2px;
}

.section-kicker h2 {
  margin: 0;
  color: var(--navy-900);
  font-size: 1.45rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.icon-box {
  width: 45px;
  height: 45px;
  display: grid;
  place-items: center;
  color: var(--navy-900);
  border-radius: 11px;
  background: #eef4fb;
}

.icon-box svg {
  width: 24px;
  height: 24px;
}

.about-card > p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.93rem;
}

.text-link {
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue-600);
  font-size: 0.88rem;
  font-weight: 800;
}

.text-link span {
  transition: transform 0.2s ease;
}

.text-link:hover span {
  transform: translateX(4px);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  padding: 25px 16px;
  min-height: 210px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.stat-icon {
  width: 49px;
  height: 49px;
  display: grid;
  place-items: center;
  color: var(--blue-600);
  border-radius: 13px;
  background: #edf5ff;
}

.stat-icon.accent {
  color: #c88300;
  background: #fff6d9;
}

.stat-icon.cyan {
  color: var(--cyan-500);
  background: #e9faff;
}

.stat-icon svg {
  width: 29px;
  height: 29px;
}

.stat-card strong {
  margin: 15px 0 6px;
  color: var(--navy-900);
  font-size: clamp(1.55rem, 2.7vw, 2.15rem);
  line-height: 1;
}

.stat-card > span:last-child {
  color: var(--muted);
  font-size: 0.77rem;
}

.expertise-panel {
  margin-top: 28px;
  padding: 30px;
}

.section-heading {
  margin-bottom: 30px;
}

.section-heading > span {
  margin-bottom: 4px;
}

.section-heading h2 {
  margin: 0;
  color: var(--navy-900);
  font-size: clamp(1.9rem, 3.2vw, 2.75rem);
  line-height: 1.16;
  letter-spacing: -0.035em;
}

.section-heading.centered {
  text-align: center;
}

.section-heading.centered::after {
  content: "";
  width: 38px;
  height: 3px;
  display: block;
  margin: 14px auto 0;
  border-radius: 4px;
  background: var(--amber-500);
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.expertise-card {
  padding: 26px 20px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #fff, #fbfcfe);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.expertise-card:hover {
  transform: translateY(-5px);
  border-color: #b7cae4;
}

.expertise-card > span {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  color: var(--blue-600);
  border-radius: 17px;
  background: #eff6ff;
}

.expertise-card svg {
  width: 33px;
  height: 33px;
}

.expertise-card h3 {
  margin: 0 0 8px;
  color: var(--navy-900);
  font-size: 1rem;
}

.expertise-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.journey {
  background: #fff;
}

.split-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: start;
  gap: 70px;
}

.timeline {
  position: relative;
  margin-left: 4px;
  padding-left: 34px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 4px;
  bottom: 11px;
  width: 2px;
  background: linear-gradient(var(--blue-600), #d7e4f4);
}

.timeline-item {
  position: relative;
  padding: 0 0 28px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -34px;
  top: 5px;
  width: 12px;
  height: 12px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--blue-600);
  box-shadow: 0 0 0 2px var(--blue-600);
}

.timeline-item.current .timeline-dot {
  background: var(--amber-500);
  box-shadow: 0 0 0 2px var(--amber-500), 0 0 0 7px rgba(245, 182, 46, 0.16);
}

.timeline-item time {
  display: block;
  color: var(--blue-600);
  font-size: 0.76rem;
  font-weight: 800;
}

.timeline-item h3 {
  margin: 3px 0 2px;
  color: var(--navy-900);
  font-size: 1.08rem;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.education-card {
  position: sticky;
  top: 110px;
  padding: 30px;
}

.education-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  list-style: none;
}

.education-list li {
  padding: 15px 0;
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}

.education-list li > span {
  color: var(--amber-500);
  font-weight: 800;
}

.education-list strong,
.education-list small {
  display: block;
}

.education-list strong {
  color: var(--navy-900);
  font-size: 0.9rem;
}

.education-list small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.76rem;
}

.competencies {
  margin-top: 24px;
}

.competencies h3 {
  margin: 0 0 13px;
  color: var(--navy-900);
  font-size: 0.96rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list span {
  padding: 7px 10px;
  color: var(--blue-600);
  border: 1px solid #cfdeef;
  border-radius: 999px;
  background: #f5f9fe;
  font-size: 0.71rem;
  font-weight: 700;
}

.publications {
  background: #f5f8fc;
}

.heading-row {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
}

.publication-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.publication-card {
  position: relative;
  min-height: 245px;
  padding: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.publication-card::after {
  content: "";
  position: absolute;
  width: 100px;
  height: 100px;
  right: -45px;
  bottom: -50px;
  border-radius: 50%;
  background: #edf5ff;
}

.publication-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.pub-year {
  position: absolute;
  right: 20px;
  top: 20px;
  padding: 5px 9px;
  color: var(--blue-600);
  border-radius: 999px;
  background: #edf5ff;
  font-size: 0.7rem;
  font-weight: 800;
}

.pub-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: var(--blue-600);
  border-radius: 11px;
  background: #f0f6ff;
}

.publication-card h3 {
  margin: 24px 0 12px;
  color: var(--navy-900);
  font-size: 1.02rem;
  line-height: 1.42;
}

.publication-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.patents {
  background: #fff;
}

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

.patent-card {
  position: relative;
  padding: 30px;
  min-height: 285px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #fff, #fbfcff);
  box-shadow: var(--shadow-soft);
}

.patent-card .number {
  position: absolute;
  right: 18px;
  top: 6px;
  color: rgba(10, 53, 104, 0.07);
  font-size: 5.2rem;
  font-weight: 800;
  line-height: 1;
}

.patent-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  color: #b87900;
  border-radius: 15px;
  background: #fff4d2;
}

.patent-icon svg {
  width: 29px;
  height: 29px;
}

.patent-card h3 {
  position: relative;
  margin: 24px 0 10px;
  color: var(--navy-900);
  font-size: 1.08rem;
  line-height: 1.4;
}

.patent-card p {
  margin: 0 0 3px;
  color: var(--blue-600);
  font-size: 0.82rem;
  font-weight: 800;
}

.patent-card small {
  color: var(--muted);
  font-size: 0.74rem;
}

.membership-panel {
  margin-top: 34px;
  padding: 34px;
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  align-items: center;
  gap: 34px;
  color: #fff;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 10% 20%, rgba(36, 116, 210, 0.32), transparent 34%),
    linear-gradient(120deg, var(--navy-950), var(--navy-800));
  box-shadow: var(--shadow);
}

.membership-panel .mini-label {
  color: var(--amber-400);
}

.membership-panel h2 {
  margin: 6px 0 0;
  font-size: clamp(1.55rem, 2.6vw, 2.25rem);
  line-height: 1.2;
}

.membership-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.membership-grid article {
  padding: 23px;
  border: 1px solid rgba(255,255,255,0.13);
  border-radius: 15px;
  background: rgba(255,255,255,0.07);
}

.membership-grid strong,
.membership-grid span {
  display: block;
}

.membership-grid strong {
  color: var(--amber-400);
  font-size: 1.35rem;
}

.membership-grid span {
  margin: 3px 0 9px;
  font-size: 0.78rem;
  font-weight: 700;
}

.membership-grid p {
  margin: 0;
  color: rgba(255,255,255,0.7);
  font-size: 0.74rem;
}

.contact {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 16% 35%, rgba(26, 110, 202, 0.28), transparent 30%),
    linear-gradient(112deg, #03152f, #072d5e);
}

.contact::after {
  content: "";
  position: absolute;
  right: -130px;
  bottom: -180px;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 50%;
  box-shadow: 0 0 0 70px rgba(255,255,255,0.025), 0 0 0 140px rgba(255,255,255,0.02);
}

.contact-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 72px;
}

.section-heading.light > span {
  color: var(--amber-400);
}

.section-heading.light h2 {
  color: #fff;
}

.contact-copy > p {
  max-width: 620px;
  margin: -12px 0 28px;
  color: rgba(255,255,255,0.72);
}

.contact-list {
  display: grid;
  gap: 12px;
}

.contact-list > a,
.contact-static {
  max-width: 570px;
  padding: 12px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.contact-list > a > span,
.contact-static > span {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  color: var(--amber-400);
  border-radius: 11px;
  background: rgba(255,255,255,0.08);
}

.contact-list small,
.contact-list strong {
  display: block;
}

.contact-list small {
  color: rgba(255,255,255,0.54);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.contact-list strong {
  color: #fff;
  font-size: 0.88rem;
}

.contact-card {
  padding: 32px;
  color: var(--ink);
  border-radius: var(--radius-xl);
  background: #fff;
  box-shadow: 0 24px 60px rgba(0,0,0,0.28);
}

.contact-card h3 {
  margin: 0 0 5px;
  color: var(--navy-900);
  font-size: 1.5rem;
}

.contact-card > p {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 0.84rem;
}

.profile-links {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.profile-links a {
  padding: 12px;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.profile-links a:hover {
  transform: translateX(4px);
  border-color: #b9cbe2;
}

.profile-links a > span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  border-radius: 9px;
  background: var(--navy-900);
  font-weight: 800;
}

.profile-links strong,
.profile-links small {
  display: block;
}

.profile-links strong {
  color: var(--navy-900);
  font-size: 0.85rem;
}

.profile-links small {
  color: var(--muted);
  font-size: 0.7rem;
}

.profile-links b {
  color: var(--blue-600);
}

footer {
  color: rgba(255,255,255,0.66);
  background: var(--navy-950);
}

.footer-wrap {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-size: 0.76rem;
}

.footer-wrap p {
  margin: 0;
}

.footer-wrap a {
  color: #fff;
  font-weight: 700;
}

@media (max-width: 1080px) {
  .nav-wrap {
    grid-template-columns: auto 1fr auto;
  }

  .main-nav {
    gap: 15px;
  }

  .main-nav a {
    font-size: 0.75rem;
  }

  .nav-cv {
    display: none;
  }

  .hero-layout {
    gap: 42px;
  }

  .badge-one {
    left: -20px;
  }

  .badge-two {
    right: -10px;
  }

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

  .about-card {
    max-width: none;
  }

  .split-layout {
    gap: 45px;
  }
}

@media (max-width: 860px) {
  .nav-wrap {
    grid-template-columns: 1fr auto;
  }

  .nav-toggle-label {
    width: 42px;
    height: 42px;
    display: grid;
    place-content: center;
    gap: 5px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 10px;
    cursor: pointer;
  }

  .nav-toggle-label span {
    width: 20px;
    height: 2px;
    display: block;
    background: #fff;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .main-nav {
    position: absolute;
    left: 20px;
    right: 20px;
    top: calc(100% + 10px);
    padding: 18px;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 15px;
    background: rgba(4, 24, 52, 0.98);
    box-shadow: 0 20px 50px rgba(0,0,0,0.32);
  }

  .main-nav a {
    padding: 11px;
  }

  .main-nav a::after {
    display: none;
  }

  .nav-toggle:checked ~ .main-nav {
    display: flex;
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero {
    min-height: auto;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    padding-block: 64px;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-role,
  .hero-topics,
  .hero-actions {
    justify-content: center;
  }

  .hero-intro {
    margin-inline: auto;
  }

  .hero-visual {
    width: min(420px, 85%);
    justify-self: center;
  }

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

  .split-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .education-card {
    position: static;
  }

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

  .membership-panel {
    grid-template-columns: 1fr;
  }

  .contact-layout {
    gap: 46px;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .nav-wrap {
    min-height: 70px;
  }

  .brand-name {
    font-size: 0.88rem;
  }

  .brand-tagline {
    font-size: 0.58rem;
  }

  .hero-layout {
    padding-block: 52px 58px;
  }

  .hero h1 span {
    font-size: 2.2rem;
  }

  .hero h1 strong {
    font-size: 3.25rem;
  }

  .hero-role {
    font-size: 0.96rem;
  }

  .hero-role i {
    display: none;
  }

  .hero-topics {
    gap: 8px;
    font-size: 0.78rem;
  }

  .floating-badge {
    position: static;
    margin-top: 12px;
    justify-content: center;
  }

  .hero-visual {
    width: 100%;
  }

  .section-pad {
    padding-block: 62px;
  }

  .stats-grid,
  .expertise-grid,
  .publication-grid,
  .patent-grid,
  .membership-grid {
    grid-template-columns: 1fr;
  }

  .stat-card {
    min-height: 170px;
  }

  .expertise-panel {
    padding: 22px;
  }

  .heading-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .membership-panel {
    padding: 26px;
  }

  .contact-card {
    padding: 24px;
  }

  .contact-list strong {
    font-size: 0.78rem;
    overflow-wrap: anywhere;
  }

  .footer-wrap {
    padding-block: 18px;
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}