:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
  background: #f2f2f7;
  color: #1c1c1e;
  --accent: #145d47;
  --secondary: #6e6e73;
  --surface: rgba(255, 255, 255, .94);
  --border: rgba(60, 60, 67, .15);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: #f2f2f7;
  font-size: 18px;
  line-height: 1.65;
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

header { margin: 0 4px 28px; }

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 16px;
  font-weight: 700;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(34px, 7vw, 48px);
  line-height: 1.15;
  letter-spacing: -.03em;
}

.updated { margin: 0; color: var(--secondary); }

section {
  margin: 14px 0;
  padding: 22px 24px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
}

h2 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.3;
}

p { margin: 0 0 12px; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 8px 0 0; padding-left: 1.35em; }
li + li { margin-top: 8px; }
a { color: var(--accent); font-weight: 650; }

.notice {
  border-color: color-mix(in srgb, var(--accent) 28%, transparent);
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
}

footer {
  padding: 20px 4px 0;
  color: var(--secondary);
  font-size: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    background: #000;
    color: #f5f5f7;
    --accent: #78d6b3;
    --secondary: #a1a1a6;
    --surface: #1c1c1e;
    --border: rgba(235, 235, 245, .18);
  }
  body { background: #000; }
}