:root {
  color-scheme: light;
  --primary: #16804b;
  --primary-dark: #0d6037;
  --primary-light: #e5f4eb;
  --background: #f4f7f5;
  --surface: #ffffff;
  --text: #18201c;
  --muted: #65706a;
  --border: #dce4df;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: var(--primary-dark); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 940px;
  margin: 0 auto;
  padding: 1.25rem;
}

.brand {
  color: var(--text);
  font-size: 1.4rem;
  font-weight: 800;
  text-decoration: none;
}

.brand span { color: var(--primary); }

nav { display: flex; gap: 1rem; }

nav a {
  padding: .35rem .15rem;
  color: var(--muted);
  font-weight: 650;
  text-decoration: none;
}

nav a[aria-current="page"] {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 1rem 1.25rem 4rem;
}

.card {
  padding: clamp(1.5rem, 4vw, 3.5rem);
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 14px 34px rgba(24, 32, 28, .07);
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-size: .8rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1 {
  margin: .25rem 0 0;
  font-size: clamp(2.2rem, 7vw, 3.8rem);
  line-height: 1.08;
}

h2 {
  margin: 2.2rem 0 .6rem;
  font-size: 1.4rem;
  line-height: 1.3;
}

h3 {
  margin: 1.5rem 0 .3rem;
  font-size: 1.08rem;
}

p, li { color: #303a35; }

.updated {
  margin-top: .6rem;
  color: var(--muted);
}

.callout {
  margin: 2rem 0;
  padding: 1.25rem;
  border-radius: 14px;
  background: var(--primary-light);
}

.callout h2 { margin-top: 0; }

.button {
  display: inline-block;
  padding: .75rem 1rem;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 750;
  text-decoration: none;
}

footer {
  padding: 0 1.25rem 2.5rem;
  text-align: center;
}

footer p {
  color: var(--muted);
  font-size: .9rem;
}

@media (max-width: 560px) {
  .site-header { align-items: flex-start; }
  nav { gap: .65rem; }
  .card { border-radius: 14px; }
}