:root {
  --color-bg: #f7f8fb;
  --color-surface: #ffffff;
  --color-text: #1e2430;
  --color-muted: #5f6b7a;
  --color-primary: #1a3a52;
  --color-primary-dark: #0f2438;
  --color-accent-cyan: #2ba8a8;
  --color-accent-green: #6db86d;
  --color-border: #dde3ec;
  --color-alt: #f0f7f7;

  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container: 1120px;
  --radius: 18px;
  --shadow: 0 18px 45px rgba(26, 58, 82, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo img {
  height: 50px;
  width: auto;
  display: block;
}

.logo:hover {
  text-decoration: none;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
}

.main-nav a:hover {
  color: var(--color-primary);
}

.language-link {
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
}

.hero {
  padding: 6rem 0;
  background:
    radial-gradient(circle at top left, rgba(36, 84, 166, 0.15), transparent 32rem),
    linear-gradient(135deg, #ffffff 0%, #edf3ff 100%);
}

.hero-content {
  max-width: 780px;
}

.eyebrow,
.section-label {
  margin: 0 0 0.75rem;
  color: var(--color-primary);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

h1,
h2,
h3 {
  line-height: 1.18;
  margin-top: 0;
}

h1 {
  font-size: clamp(2.3rem, 6vw, 4.7rem);
  margin-bottom: 1.25rem;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.hero-text {
  font-size: 1.25rem;
  color: var(--color-muted);
  max-width: 680px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 700;
  box-shadow: var(--shadow);
}

.button:hover {
  background: var(--color-primary-dark);
  color: #ffffff;
  text-decoration: none;
}

.button-secondary {
  background: #ffffff;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.button-secondary:hover {
  background: var(--color-alt);
  color: var(--color-primary-dark);
}

.section {
  padding: 5rem 0;
  background: var(--color-surface);
}

.section-alt {
  background: var(--color-alt);
}

.two-columns {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: 4rem;
  align-items: start;
}

.two-columns p:first-child {
  margin-top: 0;
}

.cards,
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.card,
.team-member,
.publication,
.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card p,
.team-member p,
.publication p,
.contact-card p {
  color: var(--color-muted);
}

.team-member {
  display: grid;
  gap: 1rem;
}

.team-photo {
  width: 100%;
  height: 16rem;
  object-fit: cover;
  border-radius: 16px;
  display: block;
}

.partner-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.partner-item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 7rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.partner-logo {
  width: 100%;
  max-width: 12rem;
  max-height: 3.5rem;
  object-fit: contain;
  display: block;
}

.team-member h3 {
  margin-top: 0;
}

.list {
  padding-left: 1.25rem;
}

.list li + li {
  margin-top: 0.5rem;
}

.role {
  font-weight: 700;
  color: var(--color-primary) !important;
  margin-bottom: 0.35rem;
}

.publication-list {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.publication h3 {
  margin-bottom: 0.25rem;
}

.note {
  color: var(--color-muted);
  margin-top: 1.5rem;
}

.contact-section {
  background: linear-gradient(135deg, #ffffff 0%, #edf3ff 100%);
}

.contact-box {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: start;
}

.contact-card {
  background: #ffffff;
}

.contact-label {
  margin-bottom: 0.15rem;
  font-weight: 800;
  color: var(--color-text) !important;
}

.contact-label:not(:first-child) {
  margin-top: 1.2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 700;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-main);
  font-size: 1rem;
  color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(36, 84, 166, 0.1);
}

.site-footer {
  padding: 2rem 0;
  background: #101828;
  color: #d7deea;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.footer-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.footer-logos a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border-radius: 999px;
  padding: 0.5rem 0.75rem;
  min-height: 3rem;
}

.footer-logos img {
  max-height: 2rem;
  width: auto;
  display: block;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: #ffffff;
}

@media (max-width: 860px) {
  .header-content {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 0;
  }

  .main-nav {
    gap: 0.75rem;
  }

  .hero {
    padding: 4rem 0;
  }

  .section {
    padding: 3.5rem 0;
  }

  .two-columns,
  .contact-box {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .cards,
  .team-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .container {
    width: min(100% - 1.25rem, var(--container));
  }

  .main-nav {
    font-size: 0.9rem;
  }

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

  .button {
    width: 100%;
  }

  .card,
  .team-member,
  .publication,
  .contact-card {
    padding: 1.2rem;
  }
}