:root {
  color-scheme: light;
  --ink: #18211f;
  --muted: #59635f;
  --paper: #f7f4ee;
  --surface: #ffffff;
  --line: #d9d3c8;
  --forest: #174238;
  --moss: #6b7f4f;
  --clay: #b85d42;
  --gold: #c59a3d;
  --sky: #dce9ea;
  --shadow: 0 18px 45px rgba(24, 33, 31, 0.09);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  background: var(--ink);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 6px;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(247, 244, 238, 0.93);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 760;
  text-decoration: none;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  padding: 0.55rem 0.7rem;
  border-radius: 6px;
  font-size: 0.94rem;
}

.nav-links a:hover,
.nav-links a:focus,
.nav-links a[aria-current="page"] {
  color: var(--ink);
  background: var(--sky);
  outline: none;
}

.nav-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
}

.language-switcher {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.language-switcher a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

.language-switcher a:hover,
.language-switcher a:focus,
.language-switcher a[aria-current="page"] {
  color: var(--ink);
  background: var(--sky);
  outline: none;
}

main {
  min-height: 70vh;
}

.hero {
  max-width: 1160px;
  margin: 0 auto;
  padding: 5rem 1.5rem 3.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: 3rem;
  align-items: center;
}

.hero-copy h1,
.page-title h1 {
  font-size: clamp(2.7rem, 6vw, 5.75rem);
  line-height: 0.98;
  margin: 0 0 1.25rem;
  letter-spacing: 0;
}

.hero-copy p,
.page-title p {
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  color: var(--muted);
  max-width: 760px;
  margin: 0;
}

.principles {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1.8rem 0 2rem;
}

.principle {
  border: 1px solid var(--forest);
  color: var(--forest);
  background: rgba(255, 255, 255, 0.52);
  border-radius: 6px;
  padding: 0.75rem 0.9rem;
  font-weight: 680;
}

.actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--forest);
}

.button.primary {
  color: #fff;
  background: var(--forest);
}

.button.secondary {
  color: var(--forest);
  background: transparent;
}

.research-map {
  min-height: 430px;
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(23, 66, 56, 0.08), transparent 42%),
    linear-gradient(45deg, rgba(184, 93, 66, 0.08), transparent 48%),
    var(--surface);
  box-shadow: var(--shadow);
  border-radius: 8px;
  padding: 1rem;
  display: grid;
  grid-template-rows: 1fr auto 1fr;
  gap: 0.9rem;
}

.map-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}

.map-node {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.76);
}

.map-node strong {
  display: block;
  margin-bottom: 0.25rem;
}

.map-node span {
  color: var(--muted);
  font-size: 0.93rem;
}

.map-center {
  border-radius: 6px;
  padding: 1.2rem;
  background: var(--forest);
  color: #fff;
  text-align: center;
  font-weight: 780;
}

.section {
  border-top: 1px solid var(--line);
  padding: 4rem 1.5rem;
}

.section-inner,
.page-title,
.content {
  max-width: 1160px;
  margin: 0 auto;
}

.section h2,
.content h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 1.1;
  margin: 0 0 1rem;
}

.section-lede,
.content > p {
  color: var(--muted);
  max-width: 780px;
  font-size: 1.08rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem;
  min-height: 190px;
}

.card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.1rem;
}

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

.card a {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--forest);
}

.article {
  max-width: 820px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 4rem;
}

.article-header {
  margin-bottom: 2rem;
}

.article h1 {
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 1;
  margin: 1rem 0 0;
  letter-spacing: 0;
}

.article h2 {
  font-size: clamp(1.35rem, 2vw, 1.8rem);
  line-height: 1.2;
  margin: 2.2rem 0 0.6rem;
}

.article p {
  font-size: 1.08rem;
}

.article-preview h3 {
  font-size: 1.45rem;
  margin: 0.8rem 0 0.6rem;
}

.article-preview + .article-preview {
  border-top: 1px solid var(--line);
  margin-top: 1.5rem;
  padding-top: 1.5rem;
}

.article-preview h3 a,
.text-link {
  color: var(--forest);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.article-status-note {
  margin-top: 2.5rem;
}

.article-signature {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 2rem;
  white-space: pre-wrap;
}

.page-title {
  padding: 4.5rem 1.5rem 2.5rem;
}

.content {
  padding: 0 1.5rem 4rem;
}

.content-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.6rem;
  margin: 1rem 0;
}

.content-block h2,
.content-block h3 {
  margin-top: 0;
}

.status {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.45rem 0.65rem;
  border-radius: 6px;
  background: #f0dfd8;
  color: #733321;
  border: 1px solid #dfb7aa;
  font-weight: 800;
  font-size: 0.86rem;
  text-transform: uppercase;
}

.list {
  padding-left: 1.2rem;
}

.list li {
  margin: 0.45rem 0;
}

.note {
  border-left: 4px solid var(--gold);
  padding-left: 1rem;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 1.5rem;
  color: var(--muted);
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-signature {
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 880px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 3.5rem;
  }

  .research-map {
    min-height: auto;
  }

  .grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
  }

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

  .nav-links {
    display: grid;
    grid-template-columns: repeat(2, max-content);
    justify-content: flex-start;
    width: 100%;
  }

  .nav-links a {
    padding-left: 0;
  }

  .nav-actions {
    width: 100%;
    align-items: flex-start;
  }

  .language-switcher {
    flex-wrap: wrap;
  }

  .hero-copy h1,
  .page-title h1 {
    font-size: 2.6rem;
  }

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

  .map-row,
  .grid {
    grid-template-columns: 1fr;
  }

  .section,
  .content {
    padding-bottom: 3rem;
  }
}