:root {
  --bg: #f6f5f1;
  --surface: #fcfbf8;
  --surface-2: #ece9e2;
  --text: #1d241f;
  --text-muted: #5e665f;
  --border: #d9d4cc;

  --accent: #2f6b57;
  --accent-dark: #224d3f;
  --accent-soft: #d9e6dc;

  --shadow-sm: 0 8px 24px rgba(29, 36, 31, 0.06);
  --shadow-md: 0 14px 36px rgba(29, 36, 31, 0.1);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-full: 999px;

  --max-width: 1120px;
  --narrow-width: 780px;

  --font-heading: "Inter", sans-serif;
  --font-body: "Inter", sans-serif;

  --transition: 220ms ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition), transform var(--transition);
}

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

p {
  margin-top: 0;
  margin-bottom: 1rem;
  max-width: 70ch;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--text);
  font-family: var(--font-heading);
  line-height: 1.08;
}

h1 {
  font-size: clamp(3rem, 6vw, 5.1rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  margin-bottom: 0.9rem;
}

h3 {
  font-size: 1.45rem;
  margin-bottom: 0.75rem;
}

ul {
  margin: 0;
  padding-left: 1.2rem;
}

button,
input {
  font: inherit;
}

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

.wider-left p {
  max-width: none;
}

.narrow {
  width: min(100%, var(--narrow-width));
}

.section {
  padding: 4.5rem 0;
}

.eyebrow {
  margin-bottom: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.lead {
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 48rem;
}

.meta {
  color: var(--text-muted);
  font-size: 0.94rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 1rem;
}

.skip-link:focus {
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(29, 36, 31, 0.08);
  background: rgba(246, 245, 241, 0.9);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-family: var(--font-heading);
  font-size: 1.7rem;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.3rem;
}

.site-nav a {
  position: relative;
  color: var(--text);
  font-size: 0.96rem;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.active::after {
  transform: scaleX(1);
}

.site-nav a.active {
  color: var(--accent-dark);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text);
}

.hero {
  padding-top: 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.45fr 0.85fr;
  gap: 2rem;
  align-items: start;
}

.hero-copy {
  padding-right: 1rem;
}

.hero-panel,
.card,
.mini-card,
.feature-block,
.list-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.hero-panel {
  padding: 1.5rem;
  position: relative;
}

.hero-panel::before {
  content: "";
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft) 0%, rgba(217, 230, 220, 0) 72%);
  pointer-events: none;
}

.panel-label,
.mini-title {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
}

.clean-list {
  list-style: none;
  padding-left: 0;
}

.clean-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(29, 36, 31, 0.08);
}

.clean-list li:last-child {
  border-bottom: none;
}

.button-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

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

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

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

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

.button.secondary:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.section-heading {
  margin-bottom: 1.5rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.card {
  padding: 1.5rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #c8d4cb;
}

.text-link {
  font-weight: 600;
}

.accent-section {
  background:
    linear-gradient(to bottom, transparent, transparent),
    radial-gradient(circle at top right, rgba(217, 230, 220, 0.85), rgba(217, 230, 220, 0) 45%);
}

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

.mini-card {
  padding: 1.4rem;
}

.page-hero {
  padding-top: 4.5rem;
  padding-bottom: 2rem;
}

.stack {
  display: grid;
  gap: 1.2rem;
}

.feature-block {
  padding: 1.5rem;
}

.search-box {
  margin-top: 1.5rem;
}

.search-box input {
  width: 100%;
  padding: 0.95rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--surface);
  color: var(--text);
  outline: none;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(47, 107, 87, 0.08);
}

.publication-list,
.note-list {
  display: grid;
  gap: 1rem;
}

.list-item {
  padding: 1.3rem 1.35rem;
}

.timeline-block {
  margin-bottom: 2rem;
}

.search-empty {
  margin-top: 1rem;
}

.site-footer {
  margin-top: 4rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid rgba(29, 36, 31, 0.08);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: flex-start;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-nav h2,
.footer-map h2 {
  margin-bottom: var(--space-3);
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: var(--space-4);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  font-size: var(--text-sm);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

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

#backToTop {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: 46px;
  height: 46px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

#backToTop.show {
  display: inline-flex;
}

#backToTop:hover {
  background: var(--accent-dark);
}

@media (max-width: 900px) {
  .hero-grid,
  .split-grid,
  .card-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding-right: 0;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 78px;
    right: 1rem;
    min-width: 220px;
    padding: 1rem;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    display: none;
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav.open {
    display: flex;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 3.5rem 0;
  }

  h1 {
    font-size: clamp(2.5rem, 11vw, 4rem);
  }

  h2 {
    font-size: clamp(1.8rem, 7vw, 2.4rem);
  }

  .header-inner {
    min-height: 72px;
  }

  .site-nav {
    top: 72px;
  }
}

.interest-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg, #fff);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  padding: 1rem 0;
  margin-top: 2rem; /* increase this to push it lower */
}

.interest-tabs {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-left: 10rem; /* increase to push further right */
}

.interest-tabs::-webkit-scrollbar {
  display: none;
}

.interest-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,0.12);
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  color: var(--color-text, #222);
  background: var(--color-surface, #f9f9f9);
  transition: all 180ms ease;
}

.interest-tab:hover {
  background: var(--color-primary, #01696f);
  color: #fff;
  border-color: transparent;
}

.interest-tab.active {
  background: var(--color-primary, #01696f);
  color: #fff;
  border-color: transparent;
}

.map-pin {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: default;
}

.pin-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary, #01696f);
  border: 2px solid #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.pin-label {
  font-size: 0.65rem;
  font-weight: 600;
  background: white;
  color: #222;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

@media (max-width: 600px) {
  .pin-label {
    display: none;
  }
  .pin-dot {
    width: 8px;
    height: 8px;
  }
}

/* DEFAULT: hide the tooltip */
.pin-tooltip {
  display: none;  /* ← this must be present and not overridden */
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  background: #1c1b19;
  color: #cdccca;
  border-radius: 8px;
  padding: 0.6rem 0.85rem;
  width: 220px;
  font-size: 0.8rem;
  line-height: 1.5;
  box-shadow: 0 6px 24px rgba(0,0,0,0.25);
  pointer-events: none;
  z-index: 100;
  white-space: normal;
}

/* SHOW only on hover/focus/tap */
.map-pin:hover .pin-tooltip,
.map-pin:focus-within .pin-tooltip,
.map-pin.active .pin-tooltip {
  display: block;
}