:root {
  --color-bg: #F5F3EF;
  --color-bg-warm: #EDE9E3;
  --color-bg-elevated: #FAFAF8;
  --color-ink: #1A1814;
  --color-ink-muted: #57534E;
  --color-ink-faint: #A8A29E;
  --color-accent: #9A3412;
  --color-accent-light: #C2410C;
  --color-accent-soft: #FFF7ED;
  --color-olive: #3F6212;
  --color-olive-soft: #F0FDF4;
  --color-teal: #115E59;
  --color-teal-soft: #F0FDFA;
  --color-surface: #FFFFFF;
  --color-border: rgba(26, 24, 20, 0.08);
  --font-display: 'Source Serif 4', Georgia, serif;
  --font-body: 'Source Sans 3', system-ui, sans-serif;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --radius-soft: 12px;
  --radius-pill: 9999px;
  --max-width: 1280px;
  --nav-height: 72px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1A1814;
    --color-bg-warm: #23201C;
    --color-bg-elevated: #0F0E0C;
    --color-ink: #F5F5F4;
    --color-ink-muted: #D6D3D1;
    --color-ink-faint: #78716C;
    --color-accent: #FB923C;
    --color-accent-light: #FDBA74;
    --color-accent-soft: #431407;
    --color-olive: #84CC16;
    --color-olive-soft: #1A2E05;
    --color-teal: #2DD4BF;
    --color-teal-soft: #042F2E;
    --color-surface: #23201C;
    --color-border: rgba(245, 245, 244, 0.08);
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* ── Typography ── */
.display-xl {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6.5vw, 5.5rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 400;
  text-wrap: balance;
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.75rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 400;
  text-wrap: balance;
}

.display-md {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 400;
  text-wrap: balance;
}

.display-sm {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.25vw, 1.75rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 400;
  text-wrap: balance;
}

.body-lg { font-size: 1.125rem; line-height: 1.8; max-width: 65ch; }
.body-md { font-size: 1rem; line-height: 1.7; max-width: 65ch; }
.body-sm { font-size: 0.875rem; line-height: 1.6; }

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.container-narrow {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.section { padding: clamp(4rem, 10vw, 8rem) 0; }
.section-sm { padding: clamp(2.5rem, 6vw, 5rem) 0; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.5rem, 3vw, 2rem);
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Navigation ── */
.nav-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 12px clamp(1.25rem, 4vw, 3rem);
  transition: background 0.4s var(--ease-out-expo), box-shadow 0.4s var(--ease-out-expo);
}

.nav-wrapper.scrolled {
  background: rgba(245, 243, 239, 0.88);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  box-shadow: 0 1px 0 var(--color-border);
}

@media (prefers-color-scheme: dark) {
  .nav-wrapper.scrolled {
    background: rgba(26, 24, 20, 0.88);
  }
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--color-ink-muted);
  transition: color 0.25s;
  white-space: nowrap;
}

.nav-links a:hover { color: var(--color-ink); }
.nav-links a.active { color: var(--color-ink); }

.btn-donate {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 10px 22px;
  background: var(--color-ink);
  color: var(--color-bg);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out-expo), box-shadow 0.25s;
  white-space: nowrap;
}

.btn-donate:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 20px rgba(26, 24, 20, 0.15);
}

.btn-donate:active { transform: scale(0.98); }

/* ── Mobile Menu ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: 110;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out-expo), opacity 0.3s;
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 105;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease-out-expo);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
  color: var(--color-ink);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s var(--ease-out-expo), transform 0.4s var(--ease-out-expo);
}

.mobile-menu.open a {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu.open a:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu.open a:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu.open a:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu.open a:nth-child(4) { transition-delay: 0.2s; }
.mobile-menu.open a:nth-child(5) { transition-delay: 0.25s; }
.mobile-menu.open a:nth-child(6) { transition-delay: 0.3s; }
.mobile-menu.open a:nth-child(7) { transition-delay: 0.35s; }
.mobile-menu.open a:nth-child(8) { transition-delay: 0.4s; }

@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 14px 32px;
  background: var(--color-ink);
  color: var(--color-bg);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out-expo), box-shadow 0.25s;
  white-space: nowrap;
}

.btn-primary:hover { transform: scale(1.03); box-shadow: 0 6px 24px rgba(26, 24, 20, 0.12); }
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 14px 32px;
  background: transparent;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--color-ink);
  cursor: pointer;
  transition: transform 0.25s var(--ease-out-expo), background 0.25s, color 0.25s;
  white-space: nowrap;
}

.btn-secondary:hover {
  background: var(--color-ink);
  color: var(--color-bg);
  transform: scale(1.03);
}

.btn-secondary:active { transform: scale(0.98); }

.btn-accent {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 14px 32px;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out-expo), box-shadow 0.25s;
  white-space: nowrap;
}

.btn-accent:hover { transform: scale(1.03); box-shadow: 0 6px 24px rgba(154, 52, 18, 0.2); }
.btn-accent:active { transform: scale(0.98); }

.btn-group { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ── Cards ── */
.card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-soft);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  transition: transform 0.4s var(--ease-out-expo), box-shadow 0.4s var(--ease-out-expo);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(26, 24, 20, 0.06);
}

.card-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-soft);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  transition: border-color 0.3s, background 0.3s;
}

.card-outline:hover {
  border-color: var(--color-accent);
  background: rgba(154, 52, 18, 0.02);
}

/* ── Theory of Change Diagram ── */
.toc-diagram {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.toc-step {
  position: relative;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-soft);
  padding: 2rem;
  transition: transform 0.3s var(--ease-out-expo);
}

.toc-step:hover { transform: translateY(-2px); }

.toc-number {
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.toc-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

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

/* ── Research-Advocacy Loop ── */
.ra-loop {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding: 3rem 0;
}

.ra-bubble {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.ra-bubble:first-child { background: var(--color-olive-soft); color: var(--color-olive); }
.ra-bubble:last-child { background: var(--color-teal-soft); color: var(--color-teal); }

.ra-arrow {
  font-size: 2rem;
  color: var(--color-ink-faint);
  animation: pulse-arrow 2s ease-in-out infinite;
}

@keyframes pulse-arrow {
  0%, 100% { opacity: 0.4; transform: translateX(0); }
  50% { opacity: 1; transform: translateX(4px); }
}

@media (max-width: 768px) {
  .ra-loop { flex-direction: column; }
  .ra-bubble { width: 180px; height: 180px; }
}

/* ── Ecosystem Diagram ── */
.ecosystem {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 3rem 0;
}

.eco-center {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: var(--color-ink);
  color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 1rem;
}

.eco-ring {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  width: 100%;
  max-width: 700px;
}

.eco-node {
  text-align: center;
  padding: 1.5rem 1rem;
  border-radius: var(--radius-soft);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  transition: transform 0.3s var(--ease-out-expo), border-color 0.3s;
}

.eco-node:hover { transform: translateY(-3px); border-color: var(--color-accent); }

.eco-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
  font-size: 1.25rem;
}

.eco-node:nth-child(1) .eco-icon { background: var(--color-accent-soft); }
.eco-node:nth-child(2) .eco-icon { background: var(--color-olive-soft); }
.eco-node:nth-child(3) .eco-icon { background: var(--color-teal-soft); }
.eco-node:nth-child(4) .eco-icon { background: rgba(168, 162, 158, 0.12); }

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

/* ── Event Cards ── */
.event-card {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-soft);
  transition: transform 0.3s var(--ease-out-expo);
}

.event-card:hover { transform: translateY(-2px); }

.event-date {
  flex-shrink: 0;
  width: 64px;
  text-align: center;
  padding: 0.75rem 0;
}

.event-date-month {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.event-date-day {
  font-family: var(--font-display);
  font-size: 2rem;
  line-height: 1.1;
}

.event-info { flex: 1; min-width: 0; }

.event-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.event-meta {
  font-size: 0.8125rem;
  color: var(--color-ink-faint);
  margin-bottom: 0.5rem;
}

@media (max-width: 640px) {
  .event-card { flex-direction: column; }
  .event-date { width: auto; display: flex; gap: 0.5rem; align-items: baseline; padding: 0; }
}

/* ── Resource Grid ── */
.resource-filter {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 12px 20px;
  min-height: 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s var(--ease-out-expo);
  color: var(--color-ink-muted);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
}

/* ── Footer ── */
.footer {
  background: var(--color-ink);
  color: var(--color-bg);
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: rgba(245, 243, 239, 0.65);
  max-width: 360px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(245, 243, 239, 0.65);
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.625rem; }

.footer-col a {
  font-size: 0.875rem;
  color: rgba(245, 243, 239, 0.7);
  transition: color 0.25s;
}

.footer-col a:hover { color: var(--color-bg); }

.footer-bottom {
  border-top: 1px solid rgba(245, 243, 239, 0.08);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  font-size: 0.75rem;
  color: rgba(245, 243, 239, 0.55);
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-bottom-links a {
  font-size: 0.75rem;
  color: rgba(245, 243, 239, 0.55);
  transition: color 0.25s;
}

.footer-bottom-links a:hover { color: rgba(245, 243, 239, 0.7); }

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

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ── Page Hero ── */
.page-hero {
  padding: calc(var(--nav-height) + 4rem) 0 4rem;
  text-align: center;
}

/* ── Image Block ── */
.img-block {
  border-radius: var(--radius-soft);
  overflow: hidden;
  background: var(--color-bg-warm);
}

.img-block img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ── Divider ── */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: 0;
  border: none;
}

/* ── Social Icons ── */
.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.25s, background 0.25s;
}

.social-link:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

/* ── Contact Form ── */
.form-group { margin-bottom: 1.25rem; }

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
  color: var(--color-ink);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-bg-elevated);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-ink);
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(154, 52, 18, 0.08);
}

.form-textarea { resize: vertical; min-height: 120px; }

/* ── Grain overlay ── */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: 0.02;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px;
}