*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  padding: 24px 16px 64px;
  background: #f4f6fa;
  color: #1a1d24;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
}
.container {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 40px 48px;
  background: #fff;
  border: 1px solid #e2e6ee;
  border-radius: 14px;
  box-shadow: 0 3px 16px rgba(20, 38, 80, 0.07);
}
h1 { margin: 0 0 6px; font-size: 1.65rem; line-height: 1.4; }
h2 {
  margin: 32px 0 10px;
  padding-bottom: 6px;
  border-bottom: 2px solid #e5eaf4;
  font-size: 1.08rem;
  line-height: 1.5;
}
p { margin: 0 0 12px; }
ul, ol { margin: 0 0 12px; padding-left: 1.5em; }
li { margin-bottom: 6px; }
a { color: #0a72e0; text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: #0857a8; }
.updated { margin-bottom: 28px; color: #5c6472; font-size: 0.88rem; }
.note {
  margin-top: 24px;
  padding: 12px 16px;
  border-left: 3px solid #6a8fd6;
  background: #f1f5fd;
  color: #464e5c;
  font-size: 0.92rem;
}
/* table-layout: fixed により、見出し列の幅指定を実寸へ反映する。
   auto のままだと連絡先メールアドレスのような改行できない長い文字列が本文列を押し広げ、
   狭い画面（アプリ内 WebView）で見出し列が 1 文字ずつ折り返す。 */
table { width: 100%; margin-bottom: 16px; border-collapse: collapse; table-layout: fixed; font-size: 0.92rem; }
th, td { padding: 10px 12px; border: 1px solid #dbe1ec; text-align: left; vertical-align: top; overflow-wrap: anywhere; }
th { background: #f0f3fa; font-weight: 650; }
th.row-header { width: 38%; }
[data-lang] { display: none; }
html[lang="ja"] [data-lang="ja"], html[lang="en"] [data-lang="en"] { display: block; }
.lang-switch {
  width: min(100%, 760px);
  margin: 0 auto 12px;
  text-align: right;
}
.lang-switch button {
  margin-left: 6px;
  padding: 5px 13px;
  border: 1px solid #bcc4d2;
  border-radius: 999px;
  background: #fff;
  color: #414a5a;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}
.lang-switch button:hover { background: #eef3fc; }
html[lang="ja"] .lang-switch button[data-set-lang="ja"],
html[lang="en"] .lang-switch button[data-set-lang="en"] {
  border-color: #0a72e0;
  background: #e6f0fd;
  color: #0857a8;
  font-weight: 650;
}
.card-list { display: grid; gap: 14px; margin-top: 28px; }
.card {
  display: block;
  padding: 20px 22px;
  border: 1px solid #dde3ee;
  border-radius: 11px;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.card:hover { border-color: #8fb4e8; box-shadow: 0 5px 14px rgba(16, 40, 90, 0.09); transform: translateY(-1px); }
.card h2 { margin: 0 0 4px; padding: 0; border: 0; color: #0a72e0; font-size: 1.02rem; }
.card p { margin: 0; color: #596072; font-size: 0.9rem; }
@media (max-width: 600px) {
  body { padding: 16px 12px 48px; }
  .container { padding: 26px 20px; border-radius: 12px; }
  h1 { font-size: 1.45rem; }
  table { font-size: 0.82rem; }
  th, td { padding: 8px; }
  th.row-header { width: 36%; }
}
@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
}