* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--ink);
  font-family: system-ui,-apple-system,"Segoe UI",Roboto,"Hiragino Sans","Noto Sans JP",sans-serif;
}
.site-header, .site-footer {
  border-bottom: 1px solid var(--line);
  padding: 12px 16px;
}
.site-footer { border-top: 1px solid var(--line); border-bottom: 0; margin-top: 40px; }
.logo { margin: 0; font-size: 20px; }
.section-title { font-size: 14px; font-weight: 700; color: var(--muted); margin: 20px 0 10px; }