:root {
  --white: #f3f4f6;
  --teal: #14b8a6;
  --orange: #f97316;
  --black: #111827;
  --gray: #4b5563;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--black);
  background: var(--white);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

header {
  background: var(--black);
  padding: 1rem max(1.25rem, calc((100% - 52rem) / 2));
}

header img { height: 3rem; }

main {
  width: min(100% - 2.5rem, 52rem);
  min-height: calc(100vh - 10rem);
  margin: 0 auto;
  padding: 3rem 0 4rem;
}

h1, h2 { line-height: 1.25; }
h1 { margin: 0 0 0.5rem; font-size: clamp(2rem, 5vw, 3rem); }
h2 { margin: 2.25rem 0 0.5rem; font-size: 1.25rem; }
p, ul { margin: 0.5rem 0 1rem; }
ul { padding-left: 1.25rem; }
a { color: #0f766e; }
a:hover { color: var(--orange); }
.updated { color: var(--gray); font-size: 0.9rem; }
.notice {
  margin: 1.5rem 0;
  padding: 1rem;
  background: white;
  border-left: 0.25rem solid var(--teal);
}

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  padding: 1.25rem;
  color: var(--white);
  background: var(--black);
  font-size: 0.85rem;
}

footer a { color: var(--white); }