:root {
  --max: 70ch;
  --r: 16px;
  --wrap: 1120px;
  --bg: #fbfaf8;
  --surface: #ffffff;
  --text: #1b1b1b;
  --muted: rgba(27,27,27,.72);
  --line: rgba(27,27,27,.10);
  --shadow: 0 10px 30px rgba(0,0,0,.06);
  --accent: #2f5d50;
  --accent-weak: rgba(47,93,80,.12);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.75;
  background: var(--bg);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }
.prose { max-width: var(--max); }

header {
  position: sticky;
  top: 0;
  background: rgba(251,250,248,.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  z-index: 10;
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
  flex-wrap: wrap;
}
nav .links { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(0,0,0,.02);
  min-height: 44px;
}
.btn:hover { text-decoration: none; border-color: rgba(47,93,80,.35); box-shadow: 0 6px 18px rgba(0,0,0,.06); }
.btn.primary { background: var(--accent); color: #fff; border-color: rgba(47,93,80,.35); }
.btn.primary:hover { box-shadow: 0 10px 26px rgba(0,0,0,.10); }

main { padding: 34px 0 70px; }

.hero { display: grid; gap: 18px; align-items: start; padding: 26px 0 10px; }

.k {
  letter-spacing: .10em;
  text-transform: uppercase;
  font-size: .78rem;
  color: var(--muted);
}

h1 {
  margin: .45rem 0 .55rem;
  line-height: 1.12;
  font-weight: 650;
  letter-spacing: -0.02em;
  font-size: clamp(2.0rem, 3vw, 2.8rem);
}

h2 {
  margin: 2.3rem 0 .8rem;
  line-height: 1.2;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
}

.grid { display: grid; gap: 14px; }

.card {
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.muted { color: var(--muted); }
section { margin-top: 18px; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--accent-weak);
  color: rgba(27,27,27,.86);
}

@media (min-width: 900px) {
  .hero { grid-template-columns: 1.2fr .8fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  nav { padding: 10px 0; }
  nav .links { width: 100%; justify-content: flex-start; }
  nav .links a { padding: 8px 2px; }
}

@media (max-width: 520px) {
  .wrap { padding: 0 16px; }
  main { padding: 26px 0 56px; }
  .hero { padding: 18px 0 6px; }
  h1 { font-size: 2.05rem; }
  .grid { gap: 12px; }
  .btn { width: 100%; }
  .card { padding: 14px; }
}

footer { border-top: 1px solid var(--line); padding: 30px 0; }