:root {
  color-scheme: light;
  --ink: #17211f;
  --muted: #60706c;
  --accent: #0f7f74;
  --surface: #ffffff;
  --page: #f4f4ef;
  --line: #dfe5e2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

main {
  width: min(820px, calc(100% - 32px));
  margin: 48px auto;
  padding: clamp(28px, 6vw, 64px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 20px 50px rgba(23, 33, 31, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
}

.mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  background: var(--accent);
  color: white;
  font-size: 23px;
}

h1 {
  margin: 48px 0 12px;
  font-size: clamp(38px, 8vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

h2 {
  margin: 38px 0 8px;
  font-size: 24px;
  line-height: 1.25;
}

p, li { color: var(--muted); }

.lede {
  max-width: 650px;
  font-size: 20px;
}

.meta {
  color: var(--muted);
  font-size: 15px;
}

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

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font-weight: 700;
  text-decoration: none;
}

.button.secondary {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--accent);
}

footer {
  margin-top: 52px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 560px) {
  main { margin: 16px auto; border-radius: 20px; }
  h1 { margin-top: 36px; }
}