/* ROSCA, これだけIT — Web版共通スタイル（メールと同じ配色・フォントB） */
:root {
  --bg: #EAF0F6; --surface: #ffffff; --text: #23496D; --muted: #4f6b86; --faint: #6b819a;
  --line: #d6e0ea; --accent: #29ABE2; --link: #00897f; --note: #F2F6FA;
  --cta: #F69327; --cta-text: #222222;
  --bar-strong: #29ABE2; --bar-weak: #C5D3E0;
  --grad-a: #8CC63F; --grad-b: #29ABE2;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1722; --surface: #172231; --text: #dfe8f2; --muted: #a9bccf; --faint: #8399ad;
    --line: #2a3a4d; --accent: #4cc0ee; --link: #4fd1c5; --note: #1d2b3c;
    --bar-strong: #4cc0ee; --bar-weak: #3a4b5f;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1722; --surface: #172231; --text: #dfe8f2; --muted: #a9bccf; --faint: #8399ad;
  --line: #2a3a4d; --accent: #4cc0ee; --link: #4fd1c5; --note: #1d2b3c;
  --bar-strong: #4cc0ee; --bar-weak: #3a4b5f;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic Medium", "Yu Gothic", YuGothic, Meiryo, "Noto Sans JP", sans-serif;
  font-size: 16px; line-height: 1.9; letter-spacing: .02em; -webkit-font-smoothing: antialiased;
  /* 改行: 文節の切れ目(<wbr>)だけで折り返す。長い英単語・URLは枠からはみ出さないよう任意位置で折る */
  word-break: keep-all; overflow-wrap: anywhere; line-break: strict;
}
h1, h2, h3, .banner h1, .issues .t, .toc a { text-wrap: balance; }
p, dd, li, .lead, figcaption { text-wrap: pretty; }
a { color: var(--link); }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }

/* ヘッダー */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text); white-space: nowrap; }
.rosca-logo { width: 79px; height: 20px; fill: currentColor; display: block; flex: none; }
.brand .k { font-weight: 700; font-size: 19px; letter-spacing: .02em; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 13px; margin-left: 16px; }

/* バナー */
.banner { background: var(--grad-b); background-image: linear-gradient(90deg, var(--grad-a), var(--grad-b)); color: #fff; border-radius: 0 0 8px 8px; padding: 28px 24px; margin-bottom: 8px; }
.banner .date { font-size: 12px; letter-spacing: .06em; opacity: .95; }
.banner h1 { font-size: 24px; line-height: 1.5; margin: 6px 0 10px; text-wrap: balance; }
.banner .pill { display: inline-flex; align-items: center; gap: 6px; background: #fff; color: #222; font-size: 12px; font-weight: 700; padding: 5px 14px; border-radius: 14px; }
.banner .pill .rosca-logo { width: 52px; height: 13px; }

.meta { font-size: 13px; color: var(--muted); margin: 12px 0 0; }
.lead { border-left: 3px solid var(--accent); padding: 4px 0 4px 16px; margin: 20px 0 8px; font-size: 15px; }
.lead .sign { display: block; font-size: 12px; color: var(--faint); margin-top: 6px; }

.toc { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px 18px; margin: 24px 0; font-size: 14px; }
.toc ol { margin: 6px 0 0; padding-left: 1.4em; }
.toc a { color: var(--text); text-decoration: none; }
.toc a:hover { color: var(--link); }

article.topic { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 28px 28px 22px; margin: 0 0 24px; scroll-margin-top: 16px; }
.tag { font-size: 12px; color: var(--faint); letter-spacing: .04em; }
article.topic h2 { font-size: 20px; line-height: 1.5; margin: 6px 0 14px; letter-spacing: .01em; text-wrap: balance; }
article.topic h3 { font-size: 14px; letter-spacing: .06em; color: var(--accent); margin: 22px 0 6px; }
article.topic p { margin: 0 0 12px; }
.career { background: var(--note); border-radius: 8px; padding: 14px 18px; margin-top: 18px; }
.career h3 { margin-top: 0 !important; }
.career dl { margin: 0; }
.career dt { font-weight: 700; font-size: 14px; margin-top: 10px; }
.career dd { margin: 2px 0 0; font-size: 15px; }
.source { font-size: 12px; color: var(--faint); margin-top: 16px; line-height: 1.7; border-top: 1px dashed var(--line); padding-top: 10px; overflow-wrap: anywhere; }
.source a { color: var(--faint); }
.infer { font-size: 13px; color: var(--muted); background: var(--note); padding: 8px 12px; border-radius: 6px; display: inline-block; margin-top: 4px; }

figure { margin: 18px 0 8px; }
figure svg { width: 100%; height: auto; display: block; }
figcaption { font-size: 12px; color: var(--faint); margin-top: 6px; }
svg text { fill: var(--text); font-family: inherit; }
svg .muted { fill: var(--muted); }
svg .strong { fill: var(--bar-strong); }
svg .weak { fill: var(--bar-weak); }

.market { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 24px 28px; margin-bottom: 24px; scroll-margin-top: 16px; }
.market h2 { font-size: 18px; margin: 0 0 10px; border-left: 4px solid var(--accent); padding-left: 10px; }
.market li { margin-bottom: 14px; }
.market li strong { display: block; }

.cta { text-align: center; padding: 8px 0 32px; font-size: 14px; color: var(--muted); }
.cta a.btn { display: inline-block; margin-top: 12px; background: var(--cta); color: var(--cta-text); font-weight: 700; font-size: 16px; letter-spacing: .04em; text-decoration: none; padding: 14px 40px; border-radius: 8px; }

/* アーカイブ一覧 */
.issues { list-style: none; padding: 0; margin: 24px 0; }
.issues li { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; margin-bottom: 14px; }
.issues a { display: block; padding: 18px 22px; color: var(--text); text-decoration: none; }
.issues a:hover { border-color: var(--accent); }
.issues .d { font-size: 12px; color: var(--faint); letter-spacing: .06em; }
.issues .t { font-size: 17px; font-weight: 700; line-height: 1.5; margin: 4px 0 6px; }
.issues .s { font-size: 13px; color: var(--muted); }

footer { border-top: 1px solid var(--line); padding: 20px 0 40px; font-size: 12px; color: var(--faint); line-height: 1.8; }
footer a { color: var(--faint); }

/* 運営会社 */
.company { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 8px 24px; margin: 24px 0; }
.company dl { display: grid; grid-template-columns: 7em 1fr; margin: 0; }
.company dt, .company dd { padding: 14px 0; border-bottom: 1px solid var(--line); margin: 0; font-size: 15px; }
.company dt { font-weight: 700; color: var(--muted); }
.company dl > :nth-last-child(-n+2) { border-bottom: 0; }
.links { display: flex; flex-wrap: wrap; gap: 12px; margin: 8px 0 32px; }
.links a { display: inline-block; border: 1px solid var(--line); background: var(--surface); color: var(--text); text-decoration: none; font-size: 14px; font-weight: 700; padding: 10px 18px; border-radius: 8px; }
.links a:hover { border-color: var(--accent); }

@media (max-width: 560px) {
  .site-header .wrap { height: auto; min-height: 56px; flex-wrap: wrap; gap: 4px 0; padding-top: 10px; padding-bottom: 10px; }
  .company { padding: 4px 16px; }
  .company dl { grid-template-columns: 1fr; }
  .company dt { padding-bottom: 0; border-bottom: 0; }
  .banner h1 { font-size: 20px; }
  article.topic, .market { padding: 20px 18px 16px; }
  article.topic h2 { font-size: 18px; }
  .site-header nav a { margin-left: 10px; }
}