:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #5a5a5a;
  --color-accent: #0a6e4e;
  --color-accent-dark: #084f38;
  --color-border: #e6e6e6;
  --font-serif: "EB Garamond", Georgia, serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* Nav */
.site-nav {
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 10;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  padding-bottom: 12px;
}

.nav-name { display: flex; align-items: center; }
.nav-logo { height: 40px; width: auto; display: block; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: 15px;
}

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

.btn {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}

.btn-donate {
  background: var(--color-accent);
  color: #fff !important;
}

.btn-donate:hover { background: var(--color-accent-dark); }

.btn-secondary {
  border: 1px solid var(--color-border);
  color: var(--color-text) !important;
}

/* Hero */
.hero {
  padding: 72px 0 48px;
}

.hero-tag {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: 40px;
  line-height: 1.25;
  margin: 0 0 20px;
  max-width: 820px;
}

.hero-bio {
  font-size: 18px;
  color: var(--color-muted);
  max-width: 680px;
  margin: 0 0 28px;
}

.hero-links {
  display: flex;
  gap: 12px;
}

/* Sections */
section {
  padding: 40px 0;
}

section + section {
  border-top: 1px solid var(--color-border);
}

h1, h2, h3 { font-family: var(--font-serif); }

h2 {
  font-size: 28px;
  margin-bottom: 16px;
}

.lede {
  font-size: 18px;
  color: var(--color-muted);
  max-width: 700px;
}

/* About columns */
.about-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 24px;
}

.about-column .lede {
  max-width: none;
}

.origin-quote {
  margin: 0 0 16px;
  padding-left: 20px;
  border-left: 3px solid var(--color-accent);
}

.origin-quote p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 20px;
  color: var(--color-text);
  max-width: 700px;
  margin: 0;
}

/* Team grid */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 32px;
  margin-top: 32px;
}

.team-card { text-align: left; }

.team-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 12px;
  background: #f2f2f2;
}

.team-name {
  font-weight: 600;
  margin: 0 0 2px;
}

.team-role {
  color: var(--color-muted);
  font-size: 14px;
  margin: 0;
}

/* Research cards */
.research-section-heading {
  margin-top: 40px;
  margin-bottom: 0;
  font-size: 22px;
}

.section-subtitle {
  color: var(--color-muted);
  font-size: 14px;
  margin: 4px 0 0;
}

.research-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.research-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 24px;
}

.research-card h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.research-card p {
  color: var(--color-muted);
  margin: 0 0 12px;
}

.research-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  padding: 20px 24px;
  background: #f4f9f6;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.research-cta p {
  margin: 0;
  font-weight: 500;
}

.research-tag {
  display: inline-block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 8px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.contact-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 24px;
}

.contact-block h3 {
  font-size: 17px;
  margin: 0 0 6px;
}

.contact-block p {
  color: var(--color-muted);
  margin: 0 0 16px;
}

.contact-block .btn {
  margin-top: auto;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
}

.social-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  margin-top: 32px;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--color-muted);
}

.footer-links { display: flex; gap: 16px; }
.footer-links a { color: var(--color-muted); text-decoration: none; }
.footer-links a:hover { color: var(--color-accent); }

.footer-legal {
  font-size: 12px;
  color: var(--color-muted);
  margin: 16px 0 0;
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links.open { display: flex; }
  .hero h1 { font-size: 30px; }
  .about-columns { grid-template-columns: 1fr; gap: 32px; }
}