:root {
  --ink: #10233f;
  --muted: #5c6a7c;
  --paper: #f6f9fc;
  --surface: #ffffff;
  --line: #dbe4ee;
  --blue: #185c9f;
  --navy: #0c315c;
  --teal: #18a39a;
  --aqua: #e6f6f5;
  --gold: #c49445;
  --shadow: 0 18px 48px rgba(16, 35, 63, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans SC", sans-serif;
  line-height: 1.6;
}

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

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

.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;
}

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(219, 228, 238, 0.9);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 252px;
  font-weight: 900;
}

.brand span:last-child {
  display: grid;
  line-height: 1.1;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.86), transparent 22%),
    linear-gradient(135deg, var(--blue), var(--teal));
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 950;
  box-shadow: 0 10px 24px rgba(24, 92, 159, 0.28);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 1.8vw, 24px);
  flex: 1;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.site-nav a:hover {
  color: var(--blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.lang-button {
  min-width: 44px;
  min-height: 32px;
  padding: 0 12px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 900;
  cursor: pointer;
}

.lang-button.is-active {
  background: var(--blue);
  color: #ffffff;
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 88vh;
  display: grid;
  align-items: center;
  padding: 132px clamp(20px, 5vw, 72px) 72px;
  color: #ffffff;
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 30, 58, 0.88), rgba(7, 30, 58, 0.56) 52%, rgba(7, 30, 58, 0.22)),
    url("https://images.unsplash.com/photo-1581093588401-fbb62a02f120?auto=format&fit=crop&w=1800&q=82")
      center / cover;
  transform: scale(1.02);
}

.hero-content {
  position: relative;
  width: min(920px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #8ce8df;
}

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

h1 {
  display: grid;
  gap: 12px;
  margin-bottom: 22px;
  font-size: clamp(3.1rem, 8vw, 7.2rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h1 small {
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(1.55rem, 4vw, 3.2rem);
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.14rem;
}

.hero-copy {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1.08rem, 2vw, 1.34rem);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-weight: 950;
  cursor: pointer;
}

.button.primary {
  background: var(--teal);
  color: #ffffff;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.46);
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--navy);
  color: #ffffff;
}

.quick-links a {
  padding: 24px clamp(18px, 4vw, 44px);
  border-right: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.9);
  font-weight: 900;
}

.quick-links a:hover {
  background: rgba(255, 255, 255, 0.08);
}

.section {
  padding: 86px clamp(20px, 5vw, 72px);
}

.about,
.expertise,
.contact {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(320px, 1.28fr);
  gap: clamp(30px, 6vw, 78px);
  align-items: start;
}

.section-label {
  position: sticky;
  top: 110px;
}

.section-body {
  max-width: 860px;
}

.section-body p,
.section-heading p,
.research-grid p,
.value-grid p,
.impact-list p,
.contact p {
  color: var(--muted);
}

blockquote {
  margin: 30px 0 0;
  padding: 24px 28px;
  background: var(--aqua);
  border-left: 5px solid var(--teal);
  color: var(--navy);
  font-size: 1.18rem;
  font-weight: 850;
}

.values,
.publications {
  background: var(--surface);
}

.section-heading {
  max-width: 880px;
  margin-bottom: 34px;
}

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

.value-grid article,
.research-grid article,
.contact-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.value-grid article,
.research-grid article {
  padding: 28px;
}

.value-icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  border-radius: 50%;
  background: var(--aqua);
  color: var(--blue);
  font-weight: 950;
}

.expertise {
  background: linear-gradient(180deg, var(--paper), #ffffff);
}

.image-panel {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.image-panel img {
  width: 100%;
  min-height: 460px;
  object-fit: cover;
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 32px;
  color: var(--ink);
  font-weight: 800;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 2px;
  color: var(--teal);
  content: "✓";
  font-weight: 950;
}

.research {
  background: var(--aqua);
}

.process-steps {
  display: grid;
  gap: 18px;
  padding: 0;
  margin: 30px 0 0;
  list-style: none;
}

.process-steps li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.process-steps span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--blue);
  color: #ffffff;
  font-weight: 950;
}

.process-steps p {
  color: var(--muted);
  margin: 0;
}

.team {
  background: linear-gradient(180deg, #ffffff, var(--paper));
}

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

.team-grid article {
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.team-grid strong {
  display: block;
  margin-bottom: 14px;
  color: var(--blue);
}

.team-grid p {
  color: var(--muted);
  margin: 0;
}

.publications {
  display: grid;
  grid-template-columns: minmax(260px, 0.86fr) minmax(320px, 1.14fr);
  gap: clamp(28px, 6vw, 72px);
}

.impact-list {
  display: grid;
  gap: 16px;
}

.impact-list article {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.impact-list span {
  color: var(--gold);
  font-weight: 950;
}

.impact-list p {
  margin: 0;
}

.products {
  min-height: 430px;
  display: grid;
  align-items: end;
  color: #ffffff;
  background:
    linear-gradient(90deg, rgba(7, 30, 58, 0.78), rgba(7, 30, 58, 0.4)),
    url("https://images.unsplash.com/photo-1518152006812-edab29b069ac?auto=format&fit=crop&w=1800&q=82")
      center / cover;
}

.products .section-body p {
  color: rgba(255, 255, 255, 0.88);
}

.products .eyebrow {
  color: #8ce8df;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 24px;
}

.contact-details {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.contact-details p {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.contact-details strong {
  min-width: 86px;
  color: var(--ink);
}

.contact-details a {
  color: var(--blue);
  font-weight: 850;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 850;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 13px 14px;
  color: var(--ink);
  font: inherit;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus,
.button:focus-visible,
.lang-button:focus-visible,
.site-nav a:focus-visible {
  outline: 3px solid rgba(24, 163, 154, 0.32);
  outline-offset: 2px;
}

.form-note {
  min-height: 1.5em;
  margin: 0;
  color: var(--blue);
  font-weight: 850;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 72px);
  background: var(--ink);
  color: #ffffff;
}

.site-footer p {
  margin: 0;
  font-weight: 850;
}

.site-footer a {
  color: #8ce8df;
  font-weight: 900;
}

@media (max-width: 1080px) {
  .brand {
    min-width: auto;
  }

  .brand strong {
    max-width: 180px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .site-nav {
    gap: 12px;
    font-size: 0.82rem;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: var(--surface);
  }

  .nav-toggle span[aria-hidden="true"],
  .nav-toggle span[aria-hidden="true"]::before,
  .nav-toggle span[aria-hidden="true"]::after {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--ink);
    content: "";
  }

  .nav-toggle span[aria-hidden="true"]::before {
    transform: translateY(-6px);
  }

  .nav-toggle span[aria-hidden="true"]::after {
    transform: translateY(4px);
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 22px 18px;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 13px 0;
  }

  .quick-links,
  .about,
  .expertise,
  .value-grid,
  .research-grid,
  .team-grid,
  .publications,
  .contact {
    grid-template-columns: 1fr;
  }

  .section-label {
    position: static;
  }

  .image-panel img {
    min-height: 320px;
  }
}

@media (max-width: 600px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand strong {
    max-width: 128px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .header-actions {
    gap: 8px;
  }

  .lang-button {
    min-width: 38px;
    padding: 0 9px;
  }

  .hero {
    min-height: 84vh;
    padding: 112px 18px 46px;
  }

  .hero-media {
    background:
      linear-gradient(180deg, rgba(7, 30, 58, 0.42), rgba(7, 30, 58, 0.86)),
      url("https://images.unsplash.com/photo-1581093588401-fbb62a02f120?auto=format&fit=crop&w=1000&q=82")
        center / cover;
  }

  h1 {
    font-size: clamp(2.9rem, 14vw, 4.4rem);
  }

  h1 small {
    font-size: clamp(1.35rem, 8vw, 2rem);
  }

  .section {
    padding: 58px 18px;
  }

  .quick-links a {
    padding: 18px;
    border-right: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
  }

  .button {
    width: 100%;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}