:root {
  --bg: #f6f8f7;
  --surface: #ffffff;
  --surface-soft: #eef5f4;
  --ink: #18232f;
  --muted: #52606d;
  --line: #d8e0df;
  --accent: #0b7285;
  --accent-dark: #075363;
  --accent-soft: #d9f1f0;
  --focus: #f2b84b;
  --shadow: 0 22px 60px rgba(24, 35, 47, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

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

a {
  color: var(--accent-dark);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  grid-template-areas: "brand logo cta";
  gap: 20px;
  align-items: center;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(246, 248, 247, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  grid-area: brand;
  justify-self: start;
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 24px;
  height: 24px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  box-shadow: inset 8px 0 0 var(--accent-soft);
}

.header-logo {
  grid-area: logo;
  justify-self: center;
  display: flex;
  align-items: center;
}

.header-cambridge-logo {
  height: clamp(26px, 4vw, 38px);
  width: auto;
  object-fit: contain;
}

.survey-action {
  display: inline-flex;
  align-items: center;
}

.survey-action-center {
  justify-content: center;
  margin-bottom: 14px;
}

.language-switch {
  display: inline-flex;
  position: relative;
}

.language-switch::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 13px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  pointer-events: none;
  transform: translateY(-65%) rotate(45deg);
}

.language-switch select {
  width: 218px;
  min-height: 48px;
  padding: 0 44px 0 18px;
  border: 1px solid var(--line);
  border-left: 0;
  border-radius: 0 999px 999px 0;
  appearance: none;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: inherit;
  font-weight: 800;
  line-height: 1;
}

.survey-action .button {
  border-radius: 999px 0 0 999px;
}

.survey-action .button:focus-visible {
  position: relative;
  z-index: 1;
}

.survey-action .language-switch select:focus-visible {
  position: relative;
  z-index: 1;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-link {
  color: var(--muted);
  font-weight: 700;
  text-decoration: none;
}

.text-link:hover {
  color: var(--accent-dark);
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
  box-shadow: 0 12px 24px rgba(11, 114, 133, 0.18);
}

.button:hover {
  background: var(--accent-dark);
}

.button-small {
  grid-area: cta;
  justify-self: end;
  min-height: 40px;
  padding: 0 16px;
  font-size: 0.92rem;
  border-radius: 999px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(320px, 0.9fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(34px, 6vw, 76px) clamp(18px, 5vw, 72px) 48px;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 880px;
  font-size: clamp(2.25rem, 5.2vw, 5.35rem);
  line-height: 1.03;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 3rem);
  line-height: 1.14;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.12rem;
  line-height: 1.25;
}

.lead {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
}

.logo-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.logo-row img,
.logo-dark {
  display: block;
  max-height: 80px;
}

.logo-cca {
  width: 116px;
  height: 80px;
  object-fit: contain;
}

.footer-logo-link {
  display: block;
  transition: opacity 0.15s ease;
}

.footer-logo-link:hover {
  opacity: 0.85;
}

.logo-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 296px;
  padding: 16px 24px;
  border-radius: 8px;
  background: #17242d;
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.logo-dark:hover {
  opacity: 0.85;
}

.logo-neurocivitas {
  width: 248px;
  height: auto;
  object-fit: contain;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  margin-top: 32px;
}

.hero-media {
  margin: 0;
}

.hero-visual {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: center;
}

.section,
.image-band,
.cta-section,
.site-footer {
  margin: 0 auto;
  padding: clamp(54px, 7vw, 86px) clamp(18px, 5vw, 72px);
}

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

.ethics-section,
.transform-section,
.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: start;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 28px;
}

.section-heading.compact {
  max-width: 920px;
}

.ethics-list p,
.site-footer p {
  margin: 0;
  color: var(--muted);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.topic-grid article {
  min-height: 210px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

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

.image-band {
  background: var(--surface-soft);
}

.context-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.context-grid figure,
.comparison figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.context-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 700;
}

.comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.comparison img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.ethics-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.ethics-list p {
  padding: 18px 20px;
  border-left: 4px solid var(--accent);
  background: var(--surface-soft);
}

.cta-section {
  background: var(--surface-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.cta-inner {
  max-width: 980px;
  margin: 0 auto;
}

.cta-section h2 {
  margin: 0 auto 28px;
  max-width: 900px;
}

.small-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  background: #17242d;
  color: #ffffff;
  grid-template-columns: minmax(0, 720px) auto;
  justify-content: space-between;
  align-items: center;
}

.site-footer h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
}

.site-footer p,
.site-footer a {
  color: #d5e4e3;
}

.site-footer span {
  display: block;
}

.footer-logos {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: flex-end;
}

.ethics-ref {
  display: block;
  margin-top: 8px;
}

@media (max-width: 920px) {
  .hero,
  .ethics-section,
  .transform-section,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-logos {
    justify-content: flex-start;
  }

  .hero {
    padding-top: 44px;
  }

  .topic-grid,
  .context-grid {
    grid-template-columns: 1fr;
  }

  .topic-grid article {
    min-height: 0;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 16px;
  }

  .site-header {
    gap: 8px 10px;
    padding: 12px 18px;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand cta"
      "logo logo";
  }

  .header-logo {
    justify-self: center;
  }

  .brand span:last-child {
    max-width: 180px;
    line-height: 1.2;
  }

  .button-small {
    min-height: 38px;
    padding: 0 11px;
    font-size: 0.82rem;
  }

  .language-switch select {
    min-height: 36px;
    font-size: 0.84rem;
  }

  .hero {
    gap: 26px;
    padding-top: 34px;
    padding-bottom: 40px;
  }

  h1 {
    font-size: clamp(1.92rem, 8.6vw, 2.18rem);
    line-height: 1.08;
  }

  .lead {
    margin-top: 22px;
    font-size: 1.04rem;
  }

  .hero-actions {
    margin-top: 28px;
  }

  .hero-visual img {
    box-shadow: 0 14px 34px rgba(24, 35, 47, 0.1);
  }

  .footer-logos {
    flex-wrap: wrap;
    gap: 12px;
  }

  .logo-dark {
    min-width: 0;
    padding: 12px 18px;
  }

  .logo-neurocivitas {
    width: 190px;
  }

  .hero-actions,
  .comparison {
    align-items: stretch;
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .survey-action {
    width: 100%;
  }

  .hero-actions .button,
  .hero-actions .text-link,
  .cta-section .button,
  .survey-action .language-switch,
  .survey-action select {
    width: 100%;
  }

  .survey-action .button {
    border-radius: 999px 999px 0 0;
  }

  .survey-action .language-switch select {
    border-top: 0;
    border-left: 1px solid var(--line);
    border-radius: 0 0 999px 999px;
  }

  .text-link {
    text-align: center;
  }
}

@media (max-width: 360px) {
  .site-header {
    padding-inline: 14px;
  }

  .brand {
    gap: 8px;
    font-size: 0.88rem;
  }

  .brand span:last-child {
    max-width: 120px;
  }

  .brand-mark {
    width: 22px;
    height: 22px;
  }

  .button-small {
    padding-inline: 10px;
    font-size: 0.78rem;
  }
}