:root { --ink:#1a1a2e; --muted:#5a5a72; --accent:#176B5B; --line:#e4e4ee; }
* { box-sizing: border-box; }
body {
  margin: 0; padding: 40px 20px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.65; color: var(--ink); background: #fafafc;
}
.wrap { max-width: 720px; margin: 0 auto; background: #fff;
        padding: 48px 44px; border-radius: 16px;
        box-shadow: 0 1px 3px rgba(0,0,0,.06); }
h1 { font-size: 1.9rem; margin: 0 0 6px; letter-spacing: -.02em; }
.date { color: var(--muted); font-size: .9rem; margin-bottom: 36px; }
h2 { font-size: 1.15rem; margin: 34px 0 10px; color: var(--accent); }
p, li { color: #2c2c40; }
ul { padding-left: 22px; }
li { margin-bottom: 7px; }
.box { background: #e8f3f0; border-left: 3px solid var(--accent);
       padding: 16px 20px; border-radius: 8px; margin: 22px 0; }
a { color: var(--accent); }
footer { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line);
         color: var(--muted); font-size: .88rem; }
.en { margin-top: 60px; padding-top: 40px; border-top: 2px solid var(--line); }
nav { margin-bottom: 30px; font-size: .92rem; }
nav a { margin-right: 16px; text-decoration: none; }
nav a:hover { text-decoration: underline; }