* { box-sizing: border-box; }
html { background: #e8e8e8; }
body { margin: 0; padding: 22px 12px; color: #303030; font: 13px/1.5 Arial, Helvetica, sans-serif; }
.site { width: 100%; max-width: 820px; margin: 0 auto; padding: 17px 19px 13px; background: #fff; border: 1px solid #888; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.wordmark { color: #283d56; font: bold 34px/1 Arial, Helvetica, sans-serif; text-decoration: none; letter-spacing: 1px; }
.subtitle { font: 10px/1.4 Arial, Helvetica, sans-serif; color: #555; letter-spacing: .5px; margin-top: 3px; }
.header-note { font-size: 10px; color: #666; text-align: right; }
.rule { border-top: 3px solid #647b93; margin: 13px 0 15px; }
.columns { display: grid; grid-template-columns: 155px minmax(0,1fr); gap: 20px; align-items: start; min-height: 290px; }
.sidebar { padding: 10px 12px; background: #eceff2; }
.sidebar a { display: block; margin-bottom: 10px; }
a { color: #174c8a; text-decoration: underline; }
a:visited { color: #574579; }
a:hover { color: #0b315d; }
h1 { font-size: 18px; font-weight: bold; margin: 0 0 12px; color: #222; }
h2 { font-size: 14px; margin: 20px 0 8px; color: #222; }
p { margin: 0 0 12px; }
ul { padding-left: 19px; margin: 0 0 12px; }
li { margin-bottom: 5px; }
hr { border: 0; border-top: 1px solid #ccc; margin: 18px 0; }
.site-footer { margin-top: 23px; padding-top: 9px; border-top: 1px solid #aaa; font-size: 10px; color: #666; }
.notice { border: 1px solid #bbb; background: #f6f6f6; padding: 12px; }
@media (max-width: 520px) {
  body { padding: 8px; }
  .site { padding: 12px; }
  .header-note { display: none; }
  .columns { grid-template-columns: 1fr; gap: 14px; }
  .sidebar { display: flex; flex-wrap: wrap; gap: 7px 14px; }
  .sidebar a { margin: 0; }
}