:root {
  --bg: #faf8f5;
  --text: #2b2b2b;
  --muted: #6b6b6b;
  --line: #e4ddd4;
  --tint: #f1ece6;
  --accent: #b0707a;       /* 装飾用 (罫線・飾り) */
  --accent-text: #8f4f5a;  /* 文字・リンク用 (AA 適合) */
  --serif: "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", "Noto Serif CJK JP", serif;
  --sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, "Noto Sans JP", "Noto Sans CJK JP", sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--sans); font-size: 16px; line-height: 1.9; letter-spacing: .04em;
}
a { color: var(--accent-text); text-underline-offset: .2em; transition: color .2s, opacity .2s; }
a:hover { color: var(--text); }
a:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 3px; border-radius: 2px; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
.wrap-wide { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* header */
.site-header { padding: 22px 0 18px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 14px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.3; }
.site-name {
  font-family: var(--serif); font-size: 24px; font-weight: 600; letter-spacing: .3em;
  color: var(--text); text-decoration: none;
}
.site-name:hover { color: var(--accent-text); }
.site-logo { font-size: 10px; letter-spacing: .4em; color: var(--muted); margin-top: 2px; }
.ad-note {
  margin: 0; padding: 12px 0; font-size: 16px; line-height: 1.7; color: var(--text);
  background: var(--tint); border-bottom: 1px solid var(--line);
}
.ad-note .wrap { display: block; }

/* hero */
.hero { padding: 72px 0 56px; text-align: center; }
.hero-title {
  font-family: var(--serif); font-weight: 500; font-size: clamp(24px, 6vw, 36px);
  line-height: 1.7; letter-spacing: .12em; margin: 0 0 28px;
}
.hero-lead { margin: 0 auto; max-width: 560px; font-size: 15px; color: var(--muted); text-align: left; }

/* section */
.section { padding: 24px 0 88px; }
.section-head { text-align: center; margin-bottom: 40px; }
.section-en {
  display: flex; align-items: center; gap: 18px; margin: 0;
  font-family: var(--serif); font-size: 14px; letter-spacing: .4em; color: var(--accent-text);
}
.section-en::before, .section-en::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.section-ja { margin: 10px 0 0; font-family: var(--serif); font-weight: 500; font-size: 20px; letter-spacing: .2em; }

/* cards */
.card-grid { display: grid; grid-template-columns: 1fr; gap: 40px 28px; }
@media (min-width: 640px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .card-grid { grid-template-columns: repeat(3, 1fr); } }
.card { margin: 0; }
.card-link { display: block; color: inherit; text-decoration: none; }
.card-thumb { aspect-ratio: 4 / 3; background: var(--tint); border: 1px solid var(--line); overflow: hidden; margin-bottom: 14px; }
.card-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card-cat { margin: 0; font-size: 11px; letter-spacing: .2em; color: var(--accent-text); }
.card-title { margin: 4px 0 6px; font-family: var(--serif); font-weight: 500; font-size: 17px; line-height: 1.7; letter-spacing: .06em; }
.card-date { font-size: 12px; color: var(--muted); }
.card-link:hover .card-title { color: var(--accent-text); }
.card-link:hover .card-thumb { border-color: var(--accent); }
.card-link:focus-visible { outline: 2px solid var(--accent-text); outline-offset: 4px; }
.card--empty .card-title { color: var(--muted); }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0 40px; font-size: 13px; color: var(--muted); text-align: center; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 24px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent-text); text-decoration: underline; }
.site-footer p { margin: 14px 0 0; }

/* fixed pages */
.prose { max-width: 720px; margin: 0 auto; padding: 56px 20px 88px; }
.prose h1 { font-family: var(--serif); font-weight: 500; font-size: 26px; letter-spacing: .12em; line-height: 1.6; margin: 0 0 40px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.prose h2 { font-family: var(--serif); font-weight: 500; font-size: 20px; letter-spacing: .1em; margin: 48px 0 16px; padding-left: 14px; border-left: 3px solid var(--accent); line-height: 1.5; }
.prose h3 { font-family: var(--serif); font-weight: 600; font-size: 17px; margin: 32px 0 10px; }
.prose p { margin: 0 0 1.4em; }
.prose ul, .prose ol { margin: 0 0 1.4em; padding-left: 1.5em; }
.prose li { margin-bottom: .4em; }
.prose li::marker { color: var(--accent); }
.prose table { width: 100%; border-collapse: collapse; margin: 0 0 1.6em; font-size: 15px; }
.prose th, .prose td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--line); line-height: 1.7; }
.prose th { background: var(--tint); font-weight: 600; white-space: nowrap; }
.prose dl { margin: 0 0 1.6em; }
.prose dt { font-weight: 600; margin-top: 1.2em; }
.prose dd { margin: .2em 0 0; padding-bottom: 1.1em; border-bottom: 1px solid var(--line); color: var(--text); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}