/* 明るい面・濃い文字・大きな操作部品。全画面で共通の視認性を保つ。 */
:root {
  color-scheme: light;
  --ink: #172b46;
  --muted: #435873;
  --blue: #075ac4;
  --blue-deep: #064594;
  --blue-soft: #edf5ff;
  --teal: #006b58;
  --teal-soft: #eaf8f1;
  --orange: #984100;
  --orange-soft: #fff4e5;
  --purple: #6838a5;
  --purple-soft: #f4efff;
  --rose: #a02e50;
  --rose-soft: #fff0f4;
  --border: #cad8e9;
  font-family: 'BIZ UDPGothic', 'Meiryo', 'Yu Gothic', sans-serif;
  font-size: 18px;
  color: var(--ink);
  background: #f5f9ff;
  line-height: 1.85;
}
body { background: #f5f9ff; color: var(--ink); }
header { max-width: 1440px; padding: 24px 40px; background: #fff; border-top: 6px solid var(--blue); border-bottom: 1px solid var(--border); }
.brand { font-size: 24px; color: var(--ink); gap: 16px; }
.brand small { font-size: 15px; color: var(--muted); letter-spacing: .04em; }
.mark { width: 56px; height: 56px; font-size: 28px; background: var(--teal); border-radius: 14px; }
.environment { font-size: 14px; font-weight: 700; color: #664409; background: #fff5ce; border-color: #d3ae4f; padding: 5px 12px; }
main { max-width: 1360px; gap: 44px 64px; padding: 56px 40px 36px; }
h1 { font-size: clamp(34px, 3.4vw, 46px); line-height: 1.5; letter-spacing: -.025em; color: var(--ink); }
h2 { font-size: 28px; color: var(--ink); }
.eyebrow { font-size: 16px; color: var(--blue-deep); }
.lead { font-size: 19px; line-height: 1.95; color: var(--muted); }
.intro { padding-top: 10px; }
.course-preview { max-width: 500px; }
.course-preview > span { font-size: 16px; font-weight: 700; color: var(--ink); }
.course-preview li { font-size: 18px; border-color: var(--border); padding: 16px 0; }
.course-preview b { font-size: 17px; font-weight: 700; color: var(--blue); }
.course-preview small { font-size: 15px; color: var(--muted); }
.course-preview li:nth-child(2) b { color: var(--teal); }
.course-preview li:nth-child(3) b { color: var(--purple); }
.caption, .hint, .privacy { font-size: 14px; line-height: 1.85; color: var(--muted); }
.driving, .learning-driving { font-size: 15px; color: #754600; background: #fff5d9; border-left: 4px solid #ba7900; padding: 14px 18px; max-width: none; border-radius: 6px; }
.panel { border: 1px solid var(--border); border-top: 5px solid var(--blue); box-shadow: 0 8px 26px #1539670d; padding: 32px; }
.step { font-size: 15px; color: var(--blue-deep); background: var(--blue-soft); padding: 4px 12px; }
.lock { color: var(--teal); font-size: 16px; }
#panel-description { font-size: 17px; color: var(--muted); }
label { font-size: 17px; color: var(--ink); }
input, select { font-size: 18px; min-height: 54px; color: var(--ink); background: #fff; border: 1px solid #7185a1; border-radius: 8px; }
input { padding: 12px 14px; }
input::placeholder { color: #54667e; opacity: 1; }
input:focus { outline: 3px solid #f5cb39; outline-offset: 2px; border-color: #172b46; }
button { min-height: 48px; border-radius: 8px; }
button:focus-visible, a:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid #172b46; outline-offset: 3px; box-shadow: 0 0 0 6px #ffe46b; }
.primary, .primary.compact { font-size: 18px; min-height: 52px; padding: 12px 22px; color: #fff; background: var(--blue); border: 1px solid var(--blue); }
.primary:hover, .primary.compact:hover { background: var(--blue-deep); border-color: var(--blue-deep); }
.secondary { font-size: 16px; color: var(--blue-deep); background: #fff; border: 1px solid #6e8db3; padding: 10px 18px; }
.secondary:hover { background: var(--blue-soft); border-color: var(--blue); }
.reveal { font-size: 16px; color: var(--blue-deep); }
.help { font-size: 16px; border-color: var(--border); }
.help p { color: var(--muted); }
.validation { border-color: var(--border); }
.validation h2 { font-size: 24px; }
.validation .eyebrow, .validation p:not(.eyebrow), .validation dt { font-size: 15px; color: var(--muted); }
.validation dd { font-size: 17px; font-weight: 700; color: var(--ink); }
footer { max-width: 1440px; padding: 24px 40px; font-size: 14px; color: var(--muted); background: #fff; border-top: 1px solid var(--border); }
#message, .learning-main #workspace-message { font-size: 16px; color: #a12436; }
.account-message { font-size: 18px; background: var(--blue-soft); }

/* 学習メニュー・教材・テスト・履歴 */
#workspace { max-width: 1440px; grid-template-columns: 240px minmax(0, 1fr); }
.learning-sidebar { background: #fff; border-color: var(--border); padding: 28px 18px; }
.sidebar-label { font-size: 15px; font-weight: 700; color: var(--muted); }
.learning-sidebar nav { gap: 10px; }
.learning-sidebar nav button { font-size: 17px; font-weight: 700; padding: 14px 12px; color: var(--ink); background: #f2f6fc; border: 1px solid #dee7f3; }
.learning-sidebar nav button:hover { background: #e4efff; }
.learning-sidebar nav button.active { color: #fff; background: var(--blue); border-color: var(--blue); box-shadow: 0 4px 10px #075ac41a; }
.sidebar-account { border-color: var(--border); font-size: 15px; color: var(--muted); }
.sidebar-account p { font-size: 15px; }
.sidebar-account button { font-size: 15px; color: var(--blue-deep); padding: 10px; min-height: 44px; }
.learning-main { padding: 28px 36px 40px; background: #f5f9ff; }
.demo-notice { font-size: 14px; line-height: 1.85; color: #684900; background: #fff7de; border: 1px solid #e7c970; border-left: 5px solid #b57b08; padding: 12px 16px; }
.demo-notice strong { color: #533b00; }
.view-heading { margin: 28px 0; }
.view-heading h1 { font-size: clamp(30px, 2.8vw, 38px); line-height: 1.5; color: var(--ink); }
.view-heading .eyebrow { font-size: 16px; }
.muted { font-size: 18px; color: var(--muted); }
.small { font-size: 15px; line-height: 1.85; color: var(--muted); }
.section-title { font-size: 26px; padding-left: 14px; border-left: 5px solid var(--blue); margin: 32px 0 20px; }
.stat-card { padding: 22px; border-color: var(--border); border-top: 5px solid var(--blue); }
.stat-card:nth-child(2) { border-top-color: var(--teal); }
.stat-card:nth-child(3) { border-top-color: var(--purple); }
.stat-card strong { font-size: 36px; color: var(--blue-deep); }
.stat-card:nth-child(2) strong { color: var(--teal); }
.stat-card:nth-child(3) strong { color: var(--purple); }
.resume-card { background: #e8f3ff; border: 1px solid #b9d6f7; padding: 28px; }
.resume-card h2 { font-size: 28px; color: #113f79; }
.resume-card > p:not(.eyebrow) { font-size: 18px; color: #284e7b; }
.course-card { --accent: var(--blue-deep); background: #fff; border-color: var(--border); border-top: 5px solid var(--accent); padding: 24px 20px; }
.course-card:nth-child(2) { --accent: var(--teal); }
.course-card:nth-child(3) { --accent: var(--purple); }
.course-card h3 { font-size: 22px; color: var(--accent); }
.course-number { font-size: 17px; font-weight: 700; color: var(--accent); }
.course-card .muted { font-size: 16px; color: var(--muted); }
.course-card .secondary { font-size: 16px; min-height: 48px; padding: 10px 16px; }
.course-card.locked { background: #f0f3f8; color: var(--muted); }
.catalog-filters select, .search-form input { font-size: 17px; min-height: 52px; color: var(--ink); border-color: #7185a1; }
.lesson-card { border-color: var(--border); border-top: 4px solid #2b80a8; padding: 24px; }
.lesson-card h3 { font-size: 23px; color: var(--ink); }
.lesson-card > .muted { font-size: 17px; }
.card-meta { font-size: 15px; color: var(--muted); flex-wrap: wrap; }
.status-badge { font-size: 14px; color: #734600; background: #fff0c6; border: 1px solid #d2b86f; padding: 3px 10px; }
.status-badge.complete { color: #005a42; background: #dff5e9; border-color: #8bc5a9; }
.text-button { font-size: 17px; color: var(--blue-deep); text-decoration: underline; text-underline-offset: 4px; }
.lesson-article { padding: 32px; border-color: var(--border); }
.lesson-article h2 { font-size: 26px; color: var(--blue-deep); }
.lesson-article p, .lesson-article li { font-size: 18px; line-height: 2; color: var(--ink); }
.goals { background: var(--blue-soft); border-left: 4px solid var(--blue); }
.source-note { font-size: 16px; background: #f2eeff; color: #49336f; }
.source-note p, .source-note a { font-size: 16px; }
.source-note a { color: #51309c; }
.question { border-color: #aabdd6; padding: 24px; }
.question legend { font-size: 20px; color: var(--ink); }
.choice { font-size: 18px; background: #fff; border-color: #9fb2cb; padding: 16px; }
.choice:has(input:checked) { background: #e9f2ff; border: 2px solid var(--blue); }
.choice input { width: 22px; height: 22px; min-height: 22px; accent-color: var(--blue); }
.result-card { border-color: var(--border); border-top: 5px solid #b87b00; }
.result-card.passed { border-top-color: var(--teal); background: #f4fff9; }
.result-score { font-size: 64px; color: #006446; }
.saved-message { font-size: 17px; color: #00583e; }
.review-item { border-color: var(--border); padding: 24px; }
.review-item h3 { font-size: 20px; }
.review-item > p:not(.small) { font-size: 18px; }
.history-card { border-color: var(--border); padding: 24px; }
.history-card h3 { font-size: 20px; }
.history-result strong { font-size: 28px; color: var(--blue-deep); }
.history-card .secondary { font-size: 16px; }
.empty-state { font-size: 18px; background: var(--blue-soft); color: var(--ink); }

/* 法令検索と原文。分類ごとに濃いアクセントと明るい背景を組み合わせる。 */
.law-search { border: 1px solid #adc9ed; border-top: 5px solid var(--blue); padding: 28px; box-shadow: 0 6px 18px #173f7409; }
.law-field { font-size: 16px; font-weight: 700; gap: 8px; }
.law-search input, .law-search select, .law-reader-tools select, .law-find input { font-size: 17px; min-height: 54px; color: var(--ink); border-color: #7185a1; padding: 12px; }
.law-search-top .primary { font-size: 18px; }
.law-filter-row { grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 14px; margin-top: 22px; }
.law-chip { font-size: 16px; font-weight: 700; color: var(--blue-deep); background: #fff; border-color: #7f9ec4; padding: 11px 15px; min-height: 48px; }
.law-chip:hover { background: #e4efff; border-color: var(--blue); }
.law-shortcuts { gap: 12px; }
.law-topic-grid { gap: 20px; }
.law-topic-card { --accent: var(--blue-deep); --tint: var(--blue-soft); border: 1px solid #c5d6ec; border-top: 5px solid var(--accent); background: var(--tint); padding: 24px; }
.law-topic-card:nth-child(5n + 2) { --accent: var(--teal); --tint: var(--teal-soft); }
.law-topic-card:nth-child(5n + 3) { --accent: var(--orange); --tint: var(--orange-soft); }
.law-topic-card:nth-child(5n + 4) { --accent: var(--purple); --tint: var(--purple-soft); }
.law-topic-card:nth-child(5n + 5) { --accent: var(--rose); --tint: var(--rose-soft); }
.law-topic-card h3 { font-size: 21px; line-height: 1.65; color: var(--accent); margin: 0 0 18px; }
.law-topic-card .law-chip { font-size: 16px; font-weight: 400; padding: 9px 12px; color: var(--accent); border-color: var(--accent); background: #fff; }
.law-topic-card .law-chip:hover { background: var(--tint); box-shadow: 0 0 0 1px var(--accent); }
.law-chips { gap: 10px; }
.law-result-card { border-color: var(--border); border-left: 5px solid var(--blue); padding: 24px; }
.law-result-card h3 { font-size: 25px; color: #123e78; }
.law-snippet { font-size: 17px; color: #304b6d; border-left: 4px solid #98bce8; line-height: 1.95; }
.law-coverage { font-size: 16px; color: var(--muted); background: #fff; border-color: #96acc8; padding: 20px; }
.law-coverage summary { font-size: 17px; color: var(--blue-deep); }
.law-source { font-size: 16px; color: #064faf; text-decoration: underline; text-underline-offset: 3px; }
.law-error, .law-warning { font-size: 16px; color: #803d00; background: #fff2d8; border-left: 4px solid #bd7900; padding: 16px; }
.law-error { color: #9b1637; background: #fff0f3; border-left-color: #b3274c; }
.law-loading { font-size: 18px; background: #e8f2ff; color: #174677; }
.law-reader-heading h2 { font-size: 32px; color: var(--ink); }
.law-reader-tools { background: #e8f2ff; border: 1px solid #b6ceed; padding: 18px; }
.law-reader-tools > .secondary, .law-find button { font-size: 16px; min-height: 48px; padding: 10px 14px; }
.law-full-text { padding: 32px; font-size: 18px; color: var(--ink); line-height: 2; border-color: #b9cbe2; }
.law-full-text h2 { font-size: 28px; }
.law-full-text h3 { font-size: 25px; color: var(--blue-deep); border-bottom: 2px solid #c6d9f1; padding-bottom: 10px; }
.law-full-text h4 { font-size: 22px; color: #21486e; }
.law-full-text .law-article { border-top-color: #cfdbeb; padding: 20px 0; }
.law-articlecaption { font-size: 17px; color: var(--muted); }
.law-full-text .law-articletitle { color: #0d468b; }
.law-full-text table { font-size: 16px; }
.law-full-text td, .law-full-text th { border-color: #839bb8; padding: 12px; }
.law-full-text th { background: #e7f1ff; color: #113f77; }
.law-toc { font-size: 16px; background: #edf5ff; color: #244d7d; padding: 18px; }
.law-amendment { font-size: 15px; background: #f4efff; color: #593788; padding: 12px; }
.law-match { background: #fff0a3; color: var(--ink); }
.law-current-match { background: #ffd16e; outline-color: #925000; }
.law-sourcetext { font-size: 17px; line-height: 1.95; color: var(--ink); }
.law-original-pdf summary { font-size: 17px; background: #eaf6f0; color: #005c47; padding: 16px; }

@media (max-width: 1150px) {
  #workspace { grid-template-columns: 210px minmax(0, 1fr); }
  .learning-main { padding: 24px; }
  .law-filter-row { grid-template-columns: 1fr 1fr; }
  .course-grid { grid-template-columns: 1fr; }
  .course-card { padding: 22px; }
  .law-topic-card { padding: 20px; }
  .stat-card { padding: 18px 14px; }
}
@media (max-width: 750px) {
  header { padding: 18px 20px; }
  .brand { font-size: 21px; gap: 12px; }
  .brand small { font-size: 14px; }
  .mark { width: 48px; height: 48px; font-size: 26px; }
  .environment { font-size: 13px; padding: 4px 8px; }
  #workspace { display: block; }
  .learning-sidebar { padding: 16px; }
  .learning-sidebar nav { grid-template-columns: 1fr 1fr; gap: 10px; }
  .learning-sidebar nav button { font-size: 16px; padding: 12px 8px; text-align: center; }
  .sidebar-account { gap: 6px; padding-top: 14px; }
  .sidebar-account p { font-size: 14px; flex: 1 1 100%; padding: 0; }
  .sidebar-account button { font-size: 14px; min-height: 44px; padding: 8px 12px; }
  .learning-main { padding: 20px 16px 28px; }
  .demo-notice { font-size: 14px; padding: 12px; }
  .view-heading h1 { font-size: 29px; }
  .view-heading .eyebrow { font-size: 15px; }
  .muted, .lead { font-size: 18px; }
  .small { font-size: 15px; }
  .section-title { font-size: 24px; }
  .law-search { padding: 18px 16px; }
  .law-search-top { display: block; }
  .law-search-top button { margin-top: 16px; width: 100%; }
  .law-filter-row { gap: 14px 10px; }
  .law-field { font-size: 15px; }
  .law-search input, .law-search select, .law-reader-tools select, .law-find input { font-size: 16px; padding: 10px; }
  .law-topic-card h3 { font-size: 21px; }
  .law-topic-card .law-chip { font-size: 16px; }
  .law-result-card { padding: 20px 16px; }
  .law-result-card h3 { font-size: 23px; }
  .law-reader-heading h2 { font-size: 27px; }
  .law-reader-tools { padding: 14px; }
  .law-find { flex-wrap: wrap; }
  .law-find input { flex: 1 1 100%; }
  .law-find button { flex: 1; }
  .law-full-text { padding: 22px 16px; font-size: 18px; }
  .law-full-text h2 { font-size: 25px; }
  .law-full-text h3 { font-size: 23px; }
  .law-full-text h4 { font-size: 21px; }
  .law-sourcetext { font-size: 17px; }
  .stat-grid { gap: 8px; }
  .stat-card { padding: 14px 10px; }
  .stat-card strong { font-size: 27px; }
  .stat-card .small { font-size: 14px; }
  .resume-card { padding: 24px 18px; }
  .resume-card h2 { font-size: 25px; }
  .lesson-article { padding: 24px 18px; }
  .lesson-article p, .lesson-article li { font-size: 18px; }
  .question { padding: 18px 14px; }
  .question legend { font-size: 19px; }
  .choice { font-size: 18px; padding: 14px; }
  .result-score { font-size: 54px; }
  .history-card { padding: 20px 16px; }
  .history-card h3 { font-size: 20px; }
  footer { padding: 20px; font-size: 14px; }
}
@media (max-width: 650px) {
  main { padding: 28px 20px; }
  .panel { padding: 24px; }
  h1 { font-size: 34px; }
  .environment { max-width: 104px; text-align: center; }
  .validation h2 { font-size: 23px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }