:root {
  --bg: #f7f5ef;
  --surface: #ffffff;
  --surface-soft: #eff3ed;
  --line: #d9dfd6;
  --line-strong: #bec9bf;
  --green: #254f43;
  --green-deep: #17362f;
  --green-soft: #dfe9e1;
  --copper: #a56f42;
  --shadow: 0 20px 50px rgba(22, 44, 38, 0.12);
  --radius: 8px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  margin: 0;
}

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

.skip-link {
  background: var(--green-deep);
  color: #fff;
  left: 1rem;
  padding: 0.5rem 0.75rem;
  position: absolute;
  top: -3rem;
  z-index: 30;
}

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

.site-header {
  background: rgba(247, 245, 239, 0.94);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  align-items: center;
  display: flex;
  gap: 1.25rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--container);
  padding: 0.8rem 1.25rem;
}

.site-title {
  color: var(--green-deep);
  font-size: 1.02rem;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: flex-end;
}

.site-nav a {
  border-radius: 999px;
  color: #31443f;
  font-size: 0.9rem;
  line-height: 1.2;
  padding: 0.45rem 0.7rem;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--green-soft);
  color: var(--green-deep);
}

.hero {
  min-height: 72vh;
  overflow: hidden;
  position: relative;
}

.hero::before {
  background: linear-gradient(90deg, rgba(247, 245, 239, 0.96) 0%, rgba(247, 245, 239, 0.82) 38%, rgba(247, 245, 239, 0.16) 78%);
  content: "";
  inset: 0;
  position: absolute;
  z-index: 1;
}

.hero img {
  height: 100%;
  inset: 0;
  object-fit: cover;
  position: absolute;
  width: 100%;
}

.hero-content {
  margin: 0 auto;
  max-width: var(--container);
  min-height: 72vh;
  padding: 7rem 1.25rem 6rem;
  position: relative;
  z-index: 2;
}

.hero-text {
  max-width: 650px;
}

.hero h1 {
  margin: 0.8rem 0 1.35rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  align-items: center;
  background: var(--green);
  border: 1px solid var(--green);
  border-radius: 999px;
  color: #fff;
  display: inline-flex;
  font-weight: 700;
  justify-content: center;
  min-height: 44px;
  padding: 0.65rem 1rem;
  text-decoration: none;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.68);
  color: var(--green-deep);
}

.section,
.page-main {
  margin: 0 auto;
  max-width: var(--container);
  padding: 4.5rem 1.25rem;
}

.page-main {
  padding-top: 3.5rem;
}

.page-head {
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
}

.page-head h1 {
  margin: 0.45rem 0 0.8rem;
}

.band {
  background: #fff;
  border-block: 1px solid var(--line);
}

.grid {
  display: grid;
  gap: 1rem;
}

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

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem;
}

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

.card h3 {
  margin: 0 0 0.65rem;
}

.link-card {
  color: inherit;
  display: block;
  min-height: 100%;
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.link-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.data-list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

.data-list div {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 0.5rem;
  grid-template-columns: 8rem 1fr;
  padding-bottom: 0.75rem;
}

.data-list dt {
  color: var(--green-deep);
  font-weight: 700;
}

.data-list dd {
  margin: 0;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.pill-list li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #33433f;
  padding: 0.35rem 0.7rem;
}

.research-list,
.thesis-list {
  display: grid;
  gap: 1rem;
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
}

.research-list li,
.thesis-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.research-list h3,
.thesis-block h3 {
  margin: 0 0 0.6rem;
}

.thesis-block ul {
  margin: 0.6rem 0 0;
  padding-left: 1.4rem;
}

.thesis-block li + li {
  margin-top: 0.28rem;
}

.site-footer {
  background: var(--green-deep);
  color: #e9efe8;
  margin-top: 3rem;
}

.footer-inner {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1.2fr 0.8fr;
  margin: 0 auto;
  max-width: var(--container);
  padding: 2.2rem 1.25rem;
}

.footer-inner a {
  color: #fff;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: flex-end;
}

.footer-nav a {
  text-decoration: none;
}

@media (max-width: 860px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
  }

  .hero::before {
    background: linear-gradient(180deg, rgba(247, 245, 239, 0.96) 0%, rgba(247, 245, 239, 0.88) 50%, rgba(247, 245, 239, 0.5) 100%);
  }

  .hero-content {
    min-height: 70vh;
    padding-top: 5rem;
  }

  .grid.two,
  .grid.three,
  .footer-inner {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 560px) {
  .site-title {
    white-space: normal;
  }

  .site-nav a {
    padding-inline: 0.55rem;
  }

  .section,
  .page-main {
    padding-block: 3rem;
  }

  .data-list div {
    grid-template-columns: 1fr;
  }
}