:root {
  --bg: #edf5ee;
  --surface: rgba(248, 253, 249, 0.9);
  --surface-strong: #f7fcf8;
  --ink: #1d2b24;
  --muted: #53685b;
  --line: rgba(29, 43, 36, 0.12);
  --accent: #3f8f5a;
  --accent-dark: #2b6b41;
  --accent-soft: #bddfc4;
  --navy: #214d3a;
  --shadow: 0 18px 48px rgba(25, 56, 41, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(63, 143, 90, 0.2), transparent 30%),
    radial-gradient(circle at top right, rgba(33, 77, 58, 0.16), transparent 28%),
    linear-gradient(180deg, #f5fbf6 0%, #edf5ee 52%, #e1ecdf 100%);
  min-height: 100vh;
}

a {
  color: inherit;
}

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

.site-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 22px;
  margin-bottom: 30px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(246, 252, 247, 0.8);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  transition: background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  background: var(--navy);
  color: #fff;
  transform: translateY(-1px);
}

.hero,
.page-hero,
.feature-card,
.highlight-card,
.book-card,
.publication-section,
.about-layout,
.site-footer {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 28px;
  padding: 40px;
  border-radius: var(--radius-lg);
  align-items: center;
}

.eyebrow,
.feature-label,
.book-meta {
  margin: 0 0 12px;
  font-family: Arial, sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--accent-dark);
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.1;
  color: #153224;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  margin-bottom: 20px;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 16px;
}

h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

p,
li {
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--ink);
}

.lead {
  max-width: 62ch;
  font-size: 1.15rem;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-family: Arial, sans-serif;
  font-weight: 700;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

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

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--accent-dark);
}

.button-secondary {
  border: 1px solid rgba(33, 77, 58, 0.18);
  background: rgba(255, 255, 255, 0.58);
  color: var(--navy);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(33, 77, 58, 0.08);
}

.hero-card {
  padding: 18px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(33, 77, 58, 0.08), rgba(63, 143, 90, 0.12));
}

.hero-card img {
  border-radius: 18px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  width: 100%;
}

.hero-card-text {
  padding: 18px 6px 6px;
}

.section-grid,
.highlights-grid {
  display: grid;
  gap: 22px;
}

.section-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 26px;
}

.feature-card,
.highlight-card,
.publication-section {
  border-radius: var(--radius-md);
  padding: 28px;
}

.section-block {
  margin-top: 40px;
}

.section-heading {
  margin-bottom: 18px;
}

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

.text-link {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.tag-list,
.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-list li {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(33, 77, 58, 0.08);
  font-size: 0.95rem;
}

.page-main {
  display: grid;
  gap: 26px;
}

.page-hero {
  padding: 34px;
  border-radius: var(--radius-lg);
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.book-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  padding: 22px;
  border-radius: var(--radius-md);
  align-items: start;
}

.book-card img {
  width: 100%;
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 28px rgba(24, 40, 55, 0.18);
}

.book-card-content {
  display: grid;
  align-content: start;
}

.publication-list {
  margin: 0;
  padding-left: 22px;
}

.publication-list li + li {
  margin-top: 16px;
}

.publication-list a,
.link-list a {
  color: var(--accent-dark);
}

.publication-filter {
  padding: 22px 0 6px;
}

.filter-label {
  margin: 0 0 12px;
  font-family: Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.filter-buttons,
.pub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-button,
.pub-tags span {
  border: 1px solid rgba(43, 107, 65, 0.22);
  border-radius: 999px;
  font-family: Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1;
}

.filter-button {
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--navy);
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.filter-button:hover,
.filter-button:focus-visible,
.filter-button.is-active {
  border-color: var(--accent-dark);
  background: var(--navy);
  color: #fff;
  transform: translateY(-1px);
}

.pub-tags {
  margin-top: 10px;
}

.pub-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 7px 10px;
  background: rgba(63, 143, 90, 0.1);
  color: var(--accent-dark);
}

.about-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 28px;
  padding: 28px;
  border-radius: var(--radius-lg);
  align-items: start;
}

.about-photo img {
  width: 100%;
  border-radius: 22px;
  box-shadow: 0 12px 28px rgba(24, 40, 55, 0.16);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-top: 32px;
  padding: 22px 26px;
  border-radius: 24px;
}

.site-footer p {
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  text-decoration: none;
  color: var(--navy);
  font-family: Arial, sans-serif;
  font-weight: 700;
}

@media (max-width: 980px) {
  .hero,
  .about-layout,
  .book-card {
    grid-template-columns: 1fr;
  }

  .section-grid,
  .highlights-grid,
  .books-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 20px, 1180px);
  }

  .site-header,
  .site-footer {
    border-radius: 28px;
    padding: 18px;
  }

  .site-header,
  .site-footer,
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero,
  .page-hero,
  .feature-card,
  .highlight-card,
  .publication-section,
  .about-layout,
  .book-card {
    padding: 22px;
  }

  h1 {
    font-size: clamp(2.1rem, 12vw, 3.3rem);
  }
}