:root {
  --bg: #E6EDF0;
  --card: #FFFFFF;
  --ink: #4A3B21;
  --ink-soft: #6B5A3A;
  --accent: #CC452E;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1C2232;
    --card: #262E42;
    --ink: #F5F2E6;
    --ink-soft: #D1D8EC;
    --accent: #F08A73;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 17px;
  line-height: 1.8;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}
h1 {
  font-family: "Hiragino Mincho ProN", "Yu Mincho", serif;
  font-size: 28px;
  line-height: 1.4;
  margin: 0 0 8px;
}
h2 {
  font-size: 18px;
  margin: 32px 0 8px;
}
p, ul { margin: 0 0 12px; }
ul { padding-left: 1.4em; }
.card {
  background: var(--card);
  border-radius: 16px;
  padding: 24px 20px;
}
.meta { color: var(--ink-soft); font-size: 15px; }
a { color: var(--accent); }
footer {
  margin-top: 24px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 15px;
}
.lang {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--ink-soft);
}
.lang span { font-weight: 600; color: var(--ink); }
:lang(ko) { word-break: keep-all; }   /* 韓国語は単語の途中で改行しない */