:root {
  --ink: #061b22;
  --muted: #54707a;
  --line: #d7ebe9;
  --bg: #f7fcfb;
  --panel: #ffffff;
  --aqua: #31c8c0;
  --aqua-dark: #0b827c;
  --sand: #f4e9d2;
  --deep: #032e39;
  --radius: 28px;
  --shadow: 0 24px 80px rgba(3, 46, 57, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at 80% 0%, #dff8f5 0%, transparent 32%), var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
a { color: var(--aqua-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(247, 252, 251, .88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(215, 235, 233, .85);
}
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; color: var(--ink); }
.brand img { width: 38px; height: 38px; }
.site-nav { display: flex; align-items: center; gap: 24px; font-weight: 700; font-size: 14px; }
.site-nav a { color: var(--ink); }
.nav-toggle { display: none; border: 0; background: transparent; font-size: 28px; }
.section-pad { padding: clamp(64px, 9vw, 128px) clamp(20px, 5vw, 72px); }
.hero { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: clamp(32px, 6vw, 96px); align-items: center; min-height: 78vh; }
.eyebrow { color: var(--aqua-dark); text-transform: uppercase; letter-spacing: .14em; font-size: 12px; font-weight: 900; margin: 0 0 18px; }
h1, h2, h3 { line-height: 1.05; margin: 0; }
h1 { font-size: clamp(48px, 8vw, 96px); letter-spacing: -.07em; max-width: 900px; }
h2 { font-size: clamp(36px, 5vw, 64px); letter-spacing: -.05em; }
h3 { font-size: 26px; letter-spacing: -.03em; }
.lede { font-size: clamp(19px, 2.2vw, 26px); color: var(--muted); max-width: 760px; margin: 28px 0; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 22px; border-radius: 999px; font-weight: 900; }
.button.primary { background: var(--ink); color: white; }
.button.secondary { border: 1px solid var(--line); color: var(--ink); background: white; }
.hero-art img { width: 100%; filter: drop-shadow(0 40px 50px rgba(3, 46, 57, .18)); }
.statement { padding: 42px clamp(20px, 5vw, 72px); background: var(--deep); color: white; }
.statement p { max-width: 980px; margin: 0 auto; text-align: center; font-size: clamp(26px, 4vw, 52px); line-height: 1.12; letter-spacing: -.04em; font-weight: 850; }
.two-col { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(28px, 7vw, 112px); align-items: start; }
.stack p { font-size: 20px; color: var(--muted); margin-top: 0; }
.compact-top { padding-top: 0; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: 0 10px 32px rgba(3, 46, 57, .06); }
.card-number { display: inline-block; color: var(--aqua-dark); font-weight: 950; margin-bottom: 36px; }
.card p { color: var(--muted); }
.feature { display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; align-items: stretch; background: linear-gradient(135deg, #effbf9, #fffaf0); }
.feature-panel, .feature-list { background: white; border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(28px, 5vw, 56px); box-shadow: var(--shadow); }
.feature-panel p { color: var(--muted); font-size: 19px; }
.feature-list ul { margin: 24px 0 0; padding-left: 22px; color: var(--muted); font-size: 18px; }
.alt { background: white; }
.repo-grid { display: grid; gap: 16px; }
.repo { display: block; padding: 22px; border: 1px solid var(--line); border-radius: 22px; background: var(--bg); color: var(--ink); }
.repo span { display: block; margin-top: 6px; color: var(--muted); }
.donate-section { display: grid; grid-template-columns: .95fr 1.05fr; gap: 36px; align-items: center; }
.donate-copy p { color: var(--muted); font-size: 20px; }
.donate-box { background: var(--deep); color: white; border-radius: var(--radius); padding: clamp(26px, 4vw, 44px); box-shadow: var(--shadow); }
.label { display: block; color: #9be5df; font-weight: 800; margin-bottom: 12px; }
.donate-box code { display: block; overflow-wrap: anywhere; padding: 18px; background: rgba(255,255,255,.1); border-radius: 16px; }
.copy-button { margin-top: 16px; width: 100%; min-height: 48px; border: 0; border-radius: 999px; background: var(--aqua); color: var(--ink); font-weight: 950; cursor: pointer; }
.fine-print { color: #bfe8e4; font-size: 14px; }
.contact-section { text-align: center; background: var(--sand); }
.contact-section p:not(.eyebrow) { max-width: 760px; margin: 24px auto 0; font-size: 20px; color: var(--muted); }
.site-footer { display: flex; justify-content: space-between; gap: 24px; padding: 36px clamp(20px, 5vw, 72px); background: var(--ink); color: white; }
.site-footer p { margin: 6px 0 0; color: #a9c7cc; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { color: white; }
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; inset: 75px 20px auto 20px; background: white; border: 1px solid var(--line); border-radius: 20px; padding: 20px; flex-direction: column; align-items: flex-start; box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .hero, .two-col, .feature, .donate-section { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .site-footer { flex-direction: column; }
}