*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: #1a1a1a;
  background: #f9f9f9;
  padding: 24px 16px 64px;
}
.container {
  max-width: 760px;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  padding: 40px 48px;
  box-shadow: 0 2px 12px rgba(0,0,0,.08);
}
h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.updated {
  font-size: 0.85rem;
  color: #666;
  margin-bottom: 32px;
}
h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 32px 0 10px;
  padding-bottom: 6px;
  border-bottom: 2px solid #e8e8e8;
}
p { margin-bottom: 12px; }
ul, ol {
  padding-left: 1.5em;
  margin-bottom: 12px;
}
li { margin-bottom: 6px; }
a { color: #0070f3; text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  background: #f0f0f0;
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: "SF Mono", Menlo, monospace;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 0.9rem;
}
th, td {
  border: 1px solid #ddd;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
th {
  background: #f5f5f5;
  font-weight: 600;
}
th.row-header {
  width: 38%;
}
blockquote {
  border-left: 3px solid #e0e0e0;
  padding-left: 16px;
  color: #555;
  font-size: 0.9rem;
  margin-top: 20px;
}
@media (max-width: 600px) {
  .container { padding: 24px 20px; }
  table { font-size: 0.8rem; }
  th, td { padding: 7px 8px; }
  th.row-header { width: auto; }
}

/* ---- 言語出し分け ---- */
[data-lang] { display: none; }
html[lang="ja"] [data-lang="ja"] { display: block; }
html[lang="en"] [data-lang="en"] { display: block; }

/* ---- 言語トグル ---- */
.lang-switch {
  max-width: 760px;
  margin: 0 auto 12px;
  padding: 0 4px;
  text-align: right;
}
.lang-switch button {
  background: none;
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 0.85rem;
  cursor: pointer;
  color: #555;
  margin-left: 6px;
}
.lang-switch button:hover { background: #f0f0f0; }
html[lang="ja"] .lang-switch button[data-set-lang="ja"],
html[lang="en"] .lang-switch button[data-set-lang="en"] {
  background: #e8e8e8;
  font-weight: 600;
  color: #1a1a1a;
  border-color: #aaa;
}

/* ---- トップページ用カードリスト ---- */
.card-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}
.card {
  display: block;
  padding: 20px 24px;
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.15s;
}
.card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,.1);
  text-decoration: none;
}
.card h2 {
  font-size: 1rem;
  margin: 0 0 4px;
  border: none;
  padding: 0;
  color: #0070f3;
}
.card p {
  font-size: 0.88rem;
  color: #555;
  margin: 0;
}