:root {
  --ink: #18352a;
  --muted: #5d7468;
  --green: #139963;
  --border: #e3ebe6;
  --bg: #f7f8fa;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
header div,
footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 16px;
}
header div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  flex: none;
}
.brand img { display: block; width: auto; height: 40px; }
.play {
  background: var(--green);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 10px 16px;
  border-radius: 10px;
}
main {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  /* A 16px gutter on phones, centred at 760px wide on larger screens. */
  max-width: 760px;
  margin: 32px max(16px, calc((100% - 760px) / 2)) 0;
  padding: 32px clamp(16px, 5vw, 48px) 40px;
}
h1 { font-size: clamp(28px, 6vw, 38px); line-height: 1.15; margin: 0 0 6px; }
h2 { font-size: 21px; margin: 32px 0 6px; }
.updated { color: var(--muted); margin: 0 0 24px; }
p, li { color: #2c4a3d; }
a { color: var(--green); }
ul { padding-left: 22px; }
.note {
  background: #eef8f2;
  border-radius: 12px;
  padding: 14px 18px;
}
footer {
  color: var(--muted);
  font-size: 14px;
  padding-top: 24px;
  padding-bottom: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}