/* 西和出版 — 色・大きさは DESIGN.md の値だけを使う */
:root {
  --navy: #1B2A4A;
  --navy-dark: #121D33;
  --bg: #FFFFFF;
  --bg-sub: #F5F7FA;
  --line: #DDE2EA;
  --text: #1F2937;
  --muted: #566070;
  --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  overflow-wrap: anywhere;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-underline-offset: 3px; }
a:hover { color: var(--navy-dark); }
h1, h2, h3 { line-height: 1.4; font-weight: 700; margin: 0 0 16px; color: var(--navy); }
h1 { font-size: 24px; }
h2 { font-size: 20px; }
h3 { font-size: 18px; }
p { margin: 0 0 16px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

.wrap { max-width: 1120px; margin: 0 auto; padding-inline: 16px; }
.phrase { word-break: keep-all; overflow-wrap: anywhere; }
.narrow { max-width: 752px; }

/* 見本の表示 */
.mock-bar {
  background: var(--bg-sub);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  text-align: center;
  padding: 4px 16px;
}
.mock-note { color: var(--muted); font-size: 14px; margin: 16px 0 0; }

/* ヘッダー */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px; padding-top: 12px; padding-bottom: 12px; }
.logo { text-decoration: none; display: flex; align-items: center; min-height: 44px; gap: 8px; color: var(--navy); }
.logo-main { font-size: 20px; font-weight: 700; letter-spacing: 0.08em; }
.logo-sub { font-size: 14px; color: var(--muted); }
.nav { display: flex; gap: 4px 16px; flex-wrap: wrap; font-size: 14px; }
.nav a { text-decoration: none; display: inline-flex; align-items: center; min-height: 44px; }
.nav a:hover { text-decoration: underline; }
.nav a[aria-current="page"] { font-weight: 700; text-decoration: underline; text-decoration-thickness: 2px; }

/* ボタン・ラベル */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 8px 24px;
  border-radius: 4px; border: 1px solid var(--navy);
  font-size: 16px; font-weight: 700; text-decoration: none; line-height: 1.4;
}
.btn-primary { background: var(--navy); color: var(--bg); }
.btn-primary:hover { background: var(--navy-dark); border-color: var(--navy-dark); color: var(--bg); }
.btn-secondary { background: var(--bg); color: var(--navy); }
.btn-secondary:hover { background: var(--bg-sub); }
.tag {
  display: inline-block; font-size: 13px; line-height: 1.4; font-weight: 700;
  color: var(--navy); border: 1px solid var(--navy); border-radius: 4px; padding: 2px 8px;
}
.tag-status { color: var(--muted); border-color: var(--line); background: var(--bg-sub); font-weight: 400; }

/* セクション */
.section { padding: 32px 0; }
.section-sub { background: var(--bg-sub); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.section-head h2 { margin: 0; }
.section-head .muted { font-size: 14px; }
.section-head-stack { flex-direction: column; align-items: flex-start; gap: 8px; }
.more { font-size: 14px; white-space: nowrap; display: inline-flex; align-items: center; min-height: 44px; }

/* トップ：ヒーロー */
.hero { padding: 32px 0; border-bottom: 1px solid var(--line); }
.hero h1 { font-size: 24px; max-width: 24em; }
.hero-lead { color: var(--muted); max-width: 40em; }
.hero-label { font-size: 14px; font-weight: 700; color: var(--navy); margin: 24px 0 8px; }
.exam-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.exam-links a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 8px 16px;
  border: 1px solid var(--line); border-radius: 4px; text-decoration: none; font-size: 14px; background: var(--bg);
}
.exam-links a:hover { border-color: var(--navy); }

/* 書籍カード：スマホは横長 */
.cards { display: grid; gap: 16px; }
.card {
  display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 16px;
  border: 1px solid var(--line); border-radius: 8px; padding: 16px; background: var(--bg);
  scroll-margin-top: 16px;
}
.card-cover img { border: 1px solid var(--line); }
.card-body { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; min-width: 0; }
.card-title { font-size: 16px; margin: 0; }
.card-title a { color: var(--navy); }
.card-meta { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.6; }
.card-meta strong { font-size: 16px; color: var(--navy); }
.card-meta .nowrap { display: block; }
.card-note { display: block; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.nowrap { white-space: nowrap; }
.card-actions { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.card-actions .tag-status { align-self: center; justify-self: start; padding: 4px 8px; }
.card-note { color: var(--text); }
.card-actions .btn { padding: 8px 12px; font-size: 16px; }

/* 今日の1問 */
.quiz { border: 1px solid var(--line); border-radius: 8px; background: var(--bg); padding: 24px 16px; margin-bottom: 16px; }
.quiz-q { font-size: 18px; line-height: 1.8; margin: 12px 0 8px; }
.quiz-ask { font-weight: 700; color: var(--navy); }
.quiz-a summary {
  cursor: pointer; display: inline-flex; align-items: center; min-height: 44px; padding: 8px 16px;
  border: 1px solid var(--navy); border-radius: 4px; color: var(--navy); font-weight: 700; list-style: none;
}
.quiz-a summary::-webkit-details-marker { display: none; }
.quiz-a summary::after { content: "＋"; margin-left: 12px; }
.quiz-a[open] summary::after { content: "−"; }
.quiz-a[open] summary { margin-bottom: 16px; }
.quiz-answer { font-size: 18px; }
.quiz-answer strong { color: var(--navy); font-size: 24px; }
.basis { font-size: 14px; color: var(--muted); }

/* お知らせ */
.news { list-style: none; margin: 0; padding: 0; }
.news li { display: grid; gap: 0 24px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.news li:first-child { border-top: 1px solid var(--line); }
.news time { font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }

/* パンくず */
.breadcrumb { font-size: 14px; color: var(--muted); padding: 4px 0; display: flex; flex-wrap: wrap; align-items: center; gap: 0 8px; }
.breadcrumb a { display: inline-flex; align-items: center; min-height: 44px; }

/* 書籍ページ */
.book-hero { padding: 8px 0 32px; border-bottom: 1px solid var(--line); }
.book-hero-inner { display: grid; grid-template-columns: 120px minmax(0, 1fr); grid-template-areas: "cover title" "info info"; gap: 16px; }
.book-cover { grid-area: cover; width: 120px; border: 1px solid var(--line); }
.book-title { grid-area: title; }
.book-info { grid-area: info; }
.book-title h1 { margin: 12px 0 0; }
.book-subtitle { list-style: none; margin: 0 0 8px; padding: 0; display: flex; flex-wrap: wrap; gap: 0 16px; font-weight: 700; }
.book-subtitle li { white-space: nowrap; }
.status {
  margin: 16px 0 24px; padding: 16px; background: var(--bg-sub); border: 1px solid var(--line); border-radius: 8px;
  display: grid; gap: 8px; font-variant-numeric: tabular-nums;
}
.status { grid-template-columns: max-content minmax(0, 1fr); gap: 8px 12px; }
.status div { display: contents; }
.status dt { color: var(--muted); font-size: 14px; padding-top: 2px; }
.status dd { margin: 0; }
.status .sub { display: block; font-size: 14px; color: var(--muted); }
.status.plain { background: var(--bg); }
.book-cta { margin: 0; }
.book-cta .btn { width: 100%; }
.center { text-align: center; margin-top: 32px; }
.points { margin: 0 0 24px; padding-left: 24px; list-style: disc; display: grid; gap: 16px; }
.points li::marker { color: var(--navy); }
.status strong { color: var(--navy); }
.official a { display: inline-flex; align-items: center; min-height: 44px; }
.notice { margin-top: 24px; padding: 16px; border: 1px solid var(--line); border-radius: 8px; }
.notice h3 { font-size: 16px; margin-bottom: 8px; }
.notice p { margin: 0; }
.errata { width: 100%; border-collapse: collapse; font-size: 14px; margin-bottom: 16px; }
.errata th, .errata td { border: 1px solid var(--line); padding: 8px; text-align: left; vertical-align: top; }
.errata th { background: var(--bg-sub); }
.mini-books { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 16px; }
.mini-books a { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; text-decoration: none; }
.mini-books img { width: 100%; max-width: 96px; border: 1px solid var(--line); }
.mini-title { font-size: 16px; line-height: 1.6; color: var(--navy); text-decoration: underline; }

/* 一覧・固定ページ */
.section-top { padding-top: 8px; }
.cards-list { margin-top: 24px; }
.errata-book { padding: 16px 0 8px; border-top: 1px solid var(--line); }
.errata-book h2 { font-size: 18px; }
.errata-book h2 a { color: var(--navy); }
.table-scroll { overflow-x: auto; }
.prose h2 { font-size: 18px; margin-top: 32px; }

/* 資格ページ */
.exam-list { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 12px; }
.exam-list a { display: flex; flex-direction: column; gap: 4px; padding: 16px; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; }
.exam-list a:hover { border-color: var(--navy); background: var(--bg-sub); }
.exam-name { font-size: 18px; font-weight: 700; color: var(--navy); text-decoration: underline; text-underline-offset: 3px; }
.exam-list .small { display: block; }
.jump { display: flex; flex-wrap: wrap; gap: 0 16px; font-size: 14px; margin-bottom: 0; }
.stats-block { scroll-margin-top: 16px; }
.stats-block .table-scroll:last-child table.stats { margin-bottom: 0; }
.jump a { display: inline-flex; align-items: center; min-height: 44px; }
.stats-block + .stats-block { margin-top: 32px; padding-top: 32px; border-top: 2px solid var(--navy); }
.table-note { margin: -16px 0 24px; }
table.stats .cap-note { display: block; font-weight: 400; margin-top: 4px; }
#quiz .quiz:last-child { margin-bottom: 0; }
.stats-block h3 { font-size: 18px; }
table.stats { width: 100%; border-collapse: collapse; margin: 8px 0 24px; background: var(--bg); font-variant-numeric: tabular-nums; }
table.stats caption { text-align: left; font-weight: 700; color: var(--navy); padding-bottom: 8px; }
table.stats th, table.stats td { border-bottom: 1px solid var(--line); padding: 8px; text-align: left; vertical-align: top; font-weight: 400; }
table.stats thead th { font-size: 14px; color: var(--muted); }
table.stats .num { text-align: right; white-space: nowrap; }
table.stats .share { width: 72px; text-align: right; white-space: nowrap; }
table.stats .track { display: block; width: 100%; height: 4px; margin-top: 4px; background: var(--bg-sub); border-radius: 4px; }
table.stats .bar { display: block; height: 4px; background: var(--navy); border-radius: 4px; }
table.stats .sub { display: block; font-size: 14px; color: var(--muted); margin-top: 4px; }
table.stats .sub-inline { font-size: 14px; }
table.stats .field { display: block; font-size: 14px; color: var(--muted); }
.quiz-topic { font-size: 16px; margin: 24px 0 8px; }
.post { border-top: 1px solid var(--line); padding: 16px 0; }
.exam-book { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 16px; padding: 16px 0; border-top: 1px solid var(--line); }
.exam-book img { border: 1px solid var(--line); }
.exam-book h3 { font-size: 16px; margin-bottom: 4px; }
.exam-book .card-actions { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.exam-book .card-actions .btn { padding: 8px 12px; }
.exam-book strong { font-size: 16px; color: var(--navy); }

/* フッター */
.site-footer { background: var(--navy); color: var(--bg); padding: 32px 0; font-size: 14px; }
.site-footer a { color: var(--bg); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 4px 24px; margin-bottom: 16px; }
.footer-nav a { display: inline-flex; align-items: center; min-height: 44px; }
.footer-sns, .footer-note { margin: 0 0 8px; }
.footer-sns { display: flex; flex-wrap: wrap; align-items: center; gap: 0 16px; }
.footer-sns a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; }
.copyright { margin: 16px 0 0; }

/* 720px 以上 */
@media (min-width: 720px) {
  .wrap { padding-inline: 24px; }
  h1, .hero h1 { font-size: 28px; }
  h2 { font-size: 22px; }
  .hero { padding: 48px 0; }
  .section { padding: 48px 0; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .card { grid-template-columns: 120px minmax(0, 1fr); }
  .section-head-stack { flex-direction: row; align-items: baseline; gap: 16px; }
  .status { grid-template-columns: 8em minmax(0, 1fr); gap: 8px 16px; }
  .book-cta .btn { width: auto; min-width: 240px; }
  .card-actions { grid-column: 2; display: flex; flex-wrap: wrap; align-self: end; }
  .card-cover { grid-row: span 2; }
  .news li { grid-template-columns: 9em 1fr; }
  .book-hero-inner { grid-template-columns: 240px minmax(0, 1fr); grid-template-areas: "cover title" "cover info"; gap: 16px 32px; align-items: start; }
  .book-cover { width: 240px; }
  .book-info { align-self: start; }
  .mini-books { grid-template-columns: repeat(5, 1fr); }
  .mini-books img { max-width: 120px; }
  .exam-book .card-actions { grid-column: 2; display: flex; flex-wrap: wrap; align-self: start; }
  .exam-book > a { grid-row: span 2; }
  .exam-book { grid-template-columns: 96px minmax(0, 1fr); align-items: start; }
  table.stats .share { width: 120px; }
  .section.section-top { padding-top: 24px; }
  .card-meta .nowrap { display: inline; }
}