:root {
  color-scheme: light dark;
  --ink: #1E1B18;
  --muted: #6B645C;
  --accent: #1F6F6B;
  --accent-soft: #DCEFEC;
  --paper: #FBF8F3;
  --card: #FFFFFF;
  --line: #E8E1D6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #F4EFE8;
    --muted: #A8A097;
    --accent: #5CC2BA;
    --accent-soft: #17332F;
    --paper: #141311;
    --card: #211F1C;
    --line: #34302B;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

main, footer { width: min(960px, calc(100% - 32px)); margin: 0 auto; }

.hero { padding: 80px 0 48px; }

.mark {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--accent);
  display: grid;
  place-items: center;
}

.eyebrow {
  margin: 24px 0 8px;
  color: var(--accent);
  font-weight: 750;
  letter-spacing: .06em;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-family: ui-rounded, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: clamp(38px, 6.5vw, 68px);
  line-height: 1.05;
  letter-spacing: -.03em;
}

h2 { font-family: ui-rounded, -apple-system, sans-serif; margin-top: 48px; }

.lead { max-width: 700px; margin-top: 24px; font-size: 20px; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }

article, .note {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px 22px;
}

article h3 { margin: 0 0 6px; font-size: 18px; }
article p { margin: 0; color: var(--muted); }

.note { background: var(--accent-soft); border-color: transparent; }

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

.button {
  display: inline-block;
  margin: 8px 8px 0 0;
  padding: 10px 16px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--paper);
  text-decoration: none;
  font-weight: 650;
}

footer { padding: 48px 0; color: var(--muted); font-size: 14px; }