:root {
  font-family: system-ui, sans-serif;
  color: #202a25;
  background: #fafbf8;
  line-height: 1.6;
}

* { box-sizing: border-box; }

body {
  max-width: 52rem;
  min-height: 100vh;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
}

main { flex: 1; padding: 3rem 0; }
h1 { font-size: clamp(2rem, 7vw, 3.5rem); line-height: 1.15; }
h2 { margin-top: 2rem; font-size: 1.25rem; }
a { color: #245b40; text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }
.brand { font-size: 1.25rem; font-weight: 700; text-decoration: none; }
.notice { padding: 1rem; background: #f4ecd9; border-left: 3px solid #8b691e; }
footer { border-top: 1px solid #dce2da; padding-top: 1.5rem; }
nav { display: flex; flex-wrap: wrap; gap: 1.5rem; }
[aria-current="page"] { font-weight: 700; }