:root {
  --ink: #2a1f12;          /* 道林紙 インク */
  --card: #fbf5dd;         /* 道林紙 カード */
  --bg: #ece2c4;           /* 紙地 */
  --muted: #6b5d44;
  --line: #d8c89a;
  --accent: #7a5230;       /* 焦茶 */
  --hi: #b5462f;           /* 朱 */
  --ok: #4a7a3a;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", Meiryo, system-ui, sans-serif;
  font-size: 15px; line-height: 1.6;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px;
  padding: 12px 18px; background: var(--card);
  border-bottom: 2px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 18px; letter-spacing: .02em; }
.brand span { font-weight: 400; color: var(--muted); font-size: 13px; margin-left: 6px; }
.tabs { display: flex; gap: 6px; }
.tab {
  color: var(--ink);
  background: transparent; border: 1px solid var(--line);
  padding: 7px 16px; border-radius: 8px; cursor: pointer; font-size: 14px;
  font-family: inherit;
}
.tab.active { background: var(--accent); color: #fff5e0; border-color: var(--accent); }

.view { padding: 18px; max-width: 1280px; margin: 0 auto; }
.view.hidden { display: none; }

.controls { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 14px; }
.controls input[type="text"], .controls select {
  color: var(--ink);
  background: var(--card); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px; font-size: 14px; font-family: inherit;
}
.controls input[type="text"] { flex: 1; min-width: 220px; }
.count { color: var(--muted); font-size: 13px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
table { border-collapse: collapse; width: 100%; }
#analysis-table th, #analysis-table td {
  border: 1px solid var(--line); padding: 9px 11px; vertical-align: top; text-align: left;
  font-size: 13px;
}
#analysis-table th {
  background: #f1e7c6; position: sticky; top: 0; font-weight: 700; white-space: nowrap;
}
#analysis-table tbody tr:nth-child(even) { background: #f6efd6; }
#analysis-table td.col-num { font-weight: 700; white-space: nowrap; }
.mark-hi { background: #ffe7c2; border-radius: 3px; padding: 0 2px; }

.purpose-map { margin-top: 16px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 8px 14px; }
.purpose-map summary { cursor: pointer; font-weight: 700; padding: 6px 0; }
table.mini { width: 100%; border-collapse: collapse; margin-top: 6px; }
table.mini th, table.mini td { border: 1px solid var(--line); padding: 6px 9px; font-size: 13px; text-align: left; }
table.mini th { background: #f1e7c6; }

/* 共通: .table-wrap 内の表（EU分析表・ISO要約表など）に罫線を付与 */
.table-wrap table th, .table-wrap table td {
  border: 1px solid var(--line); padding: 9px 11px; vertical-align: top; text-align: left; font-size: 13px;
}
.table-wrap table th { background: #f1e7c6; font-weight: 700; }
.table-wrap table tbody tr:nth-child(even) { background: #f6efd6; }
.note { color: var(--muted); font-size: 12px; }

/* 条文集 */
.lang-toggle { display: flex; gap: 0; }
.lang {
  color: var(--ink);
  background: var(--card); border: 1px solid var(--line);
  padding: 8px 16px; cursor: pointer; font-family: inherit; font-size: 14px;
}
.lang:first-child { border-radius: 8px 0 0 8px; }
.lang:last-child { border-radius: 0 8px 8px 0; border-left: none; }
.lang.active { background: var(--accent); color: #fff5e0; }
.articles-list { display: flex; flex-direction: column; gap: 12px; margin-top: 14px; }
.article {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px;
}
.article h3 { margin: 0 0 4px; font-size: 16px; }
.article .a-meta { color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.article .a-body { font-size: 14px; }
.article .a-tag { display: inline-block; background: #f1e7c6; border: 1px solid var(--line); border-radius: 6px; padding: 1px 8px; font-size: 12px; margin-right: 6px; }

/* クイズ */
.quiz-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.btn {
  color: var(--ink);
  background: var(--accent); color: #fff5e0; border: none;
  padding: 9px 18px; border-radius: 8px; cursor: pointer; font-size: 14px; font-family: inherit;
}
.btn:hover { filter: brightness(1.05); }
.quiz-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; max-width: 760px; }
.quiz-meta { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.quiz-q { font-size: 17px; font-weight: 700; margin-bottom: 14px; }
.quiz-opts { display: flex; flex-direction: column; gap: 8px; }
.opt {
  color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 11px 13px; cursor: pointer; font-size: 14px; text-align: left; font-family: inherit;
}
.opt:hover { border-color: var(--accent); }
.opt.correct { background: #e3f0d8; border-color: var(--ok); }
.opt.wrong { background: #f6ddd4; border-color: var(--hi); }
.quiz-fb { margin-top: 14px; padding: 12px 14px; border-radius: 8px; background: #f3ead0; border: 1px dashed var(--line); font-size: 13px; }
.quiz-fb.hidden, .quiz-card.hidden, .hint { }
.hint { color: var(--muted); }
#quiz-next { margin-top: 14px; }

/* 試験日バナー（Index/ホーム） */
.exam-banner {
  background: var(--accent); color: #fff5e0;
  text-align: center; padding: 9px 14px; font-size: 14px;
  border-bottom: 2px solid var(--line); position: sticky; top: 56px; z-index: 9;
}
.exam-banner.unset { background: #8a7a4f; }
.exam-banner b { font-weight: 700; }

/* ホーム */
.home-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; max-width: 1000px; margin: 0 auto; }
.home-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; }
.home-card h2 { margin: 0 0 10px; font-size: 17px; }
.span2 { grid-column: 1 / -1; }
.content-list { list-style: none; padding: 0; margin: 0; }
.content-list li { padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.content-list li:last-child { border-bottom: none; }
.content-list b { color: var(--ink); }
.badge { display: inline-block; font-size: 11px; padding: 2px 9px; border-radius: 10px; margin-left: 6px; vertical-align: middle; font-weight: 600; }
.badge.done { background: #e6f4ea; color: #1a7f37; border: 1px solid #b7e1c4; }
.badge.todo { background: #f3ece0; color: #8a6d3b; border: 1px solid #d8c9ac; }
.content-list li.clickable { cursor: pointer; transition: background .15s; }
.content-list li.clickable:hover { background: rgba(122,82,48,.10); border-radius: 6px; }

/* モジュール切替 */
.module-switch { display: flex; gap: 3px; background: var(--bg); border: 1px solid var(--line); border-radius: 9px; padding: 3px; }
.mod {
  color: var(--muted); background: transparent; border: none;
  padding: 6px 13px; border-radius: 6px; cursor: pointer; font-size: 13px; font-family: inherit;
}
.mod.active { background: var(--accent); color: #fff5e0; }

/* ISO/IEC 42001 要約表 */
.iso-meta { margin-bottom: 16px; }
.iso-meta-card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.iso-meta-card p { margin: 6px 0 0; font-size: 14px; }
.iso-meta-card .src { color: var(--muted); font-size: 12px; margin-top: 8px; }
.iso-table-block { margin-bottom: 24px; }
.iso-table-block h3 { font-size: 15px; margin: 0 0 8px; color: var(--accent); }
.iso-table-block .table-wrap { overflow-x: auto; }
.exam-set-row { display: flex; gap: 8px; align-items: center; margin-top: 10px; }
.exam-set-row input[type="date"] {
  color: var(--ink); background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px; font-size: 14px; font-family: inherit;
}
.exam-set-row input[type="text"] {
  color: var(--ink); background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px; font-size: 14px; font-family: inherit; min-width: 160px;
}
.sync-status { margin-top: 10px; font-size: 12px; color: var(--accent); min-height: 16px; }
.home-steps { margin: 0; padding-left: 20px; }
.home-steps li { margin-bottom: 8px; }
.home-stats { font-size: 14px; line-height: 1.7; }
.home-stats b { font-weight: 700; }

/* クイズ モード選択 */
.quiz-modes { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.modes-label { color: var(--muted); font-size: 13px; }
.mode {
  color: var(--ink); background: var(--card); border: 1px solid var(--line);
  padding: 6px 12px; border-radius: 8px; cursor: pointer; font-size: 13px; font-family: inherit;
}
.mode.active { background: var(--accent); color: #fff5e0; border-color: var(--accent); }
.fb-actions { display: flex; gap: 8px; margin-top: 10px; }
.btn.small { padding: 7px 14px; font-size: 13px; background: var(--card); color: var(--ink); border: 1px solid var(--line); }

.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 18px; }

/* ログイン認証 */
.login-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: rgba(42,31,18,.55); backdrop-filter: blur(3px);
  padding: 20px;
}
.login-overlay.hidden { display: none; }
.login-card {
  background: var(--card); border: 2px solid var(--line); border-radius: 16px;
  max-width: 420px; width: 100%; padding: 26px 28px;
  box-shadow: 0 12px 40px rgba(0,0,0,.35);
}
.login-brand { font-weight: 700; font-size: 22px; text-align: center; margin-bottom: 16px; }
.login-brand span { font-weight: 400; color: var(--muted); font-size: 14px; }
.login-form h2 { margin: 0 0 8px; font-size: 18px; }
.login-form.hidden { display: none; }
.login-input {
  display: block; width: 100%; margin: 10px 0 0;
  color: var(--ink); background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 11px 13px; font-size: 15px; font-family: inherit;
}
.login-input:focus { outline: none; border-color: var(--accent); }
.req-list { margin: 8px 0 2px; font-size: 13px; color: var(--hi); }
.req-list.ok { color: var(--ok); }
.btn.primary {
  width: 100%; margin-top: 14px;
  color: #fff5e0; background: var(--accent); border: none;
  padding: 12px; border-radius: 8px; cursor: pointer; font-size: 15px; font-family: inherit;
}
.btn.primary:hover { filter: brightness(1.05); }
.switch { text-align: center; font-size: 13px; margin: 14px 0 0; color: var(--muted); }
.switch-btn {
  background: transparent; border: none; color: var(--accent);
  font-size: 13px; font-family: inherit; text-decoration: underline;
  cursor: pointer; padding: 4px 6px; border-radius: 6px;
}
.switch-btn:hover { background: var(--bg); }
.switch-btn:active { background: var(--line); }
.login-msg { margin-top: 10px; font-size: 13px; min-height: 18px; }
.login-msg.err { color: var(--hi); }
.login-msg.ok { color: var(--ok); }
.login-foot { margin: 14px 4px 2px; font-size: 11px; color: var(--muted); line-height: 1.5; border-top: 1px solid var(--line); padding-top: 10px; }
.logout-btn { margin-left: 10px; }

.login-tabs { display: flex; gap: 8px; margin: 12px 0 6px; }
.login-tab {
  flex: 1; padding: 11px; border: 1px solid var(--line); background: var(--bg); border-radius: 8px;
  cursor: pointer; font-size: 14px; font-family: inherit; color: var(--ink);
  transition: background .12s, color .12s, border-color .12s;
}
.login-tab.active { background: var(--accent); color: #fff5e0; border-color: var(--accent); font-weight: 700; }
.login-tab:not(.active):hover { background: var(--card); }

/* ---------- DTEF（ポイント＋図） ---------- */
.dtef-meta { margin: 0 0 14px; }
.dtef-meta-card {
  background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent);
  border-radius: 8px; padding: 14px 16px;
}
.dtef-meta-card b { font-size: 16px; }
.dtef-meta-card p { margin: 6px 0 0; font-size: 13px; color: var(--ink); }
.dtef-meta-card .src { font-size: 12px; color: var(--muted); }
.dtef-layout { display: grid; grid-template-columns: 220px 1fr; gap: 18px; align-items: start; }
.dtef-toc {
  position: sticky; top: 12px; max-height: calc(100vh - 180px); overflow-y: auto;
  background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px;
}
.dtef-toc .toc-title { font-size: 12px; font-weight: 700; color: var(--muted); margin-bottom: 8px; letter-spacing: .05em; }
.toc-link { display: block; font-size: 12.5px; color: var(--ink); text-decoration: none; padding: 5px 6px; border-radius: 6px; line-height: 1.35; }
.toc-link:hover { background: var(--bg); color: var(--accent); }
.toc-link.lvl3 { padding-left: 18px; font-size: 12px; color: var(--muted); }
.toc-fig { font-size: 10px; background: var(--accent); color: #fff5e0; border-radius: 999px; padding: 1px 6px; margin-left: 4px; }
.dtef-content { min-width: 0; }
.dtef-sec {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; margin-bottom: 18px; scroll-margin-top: 12px;
}
.dtef-sec-title { font-size: 17px; margin: 0 0 12px; border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.dtef-sec-title.lvl3 { font-size: 15px; }
.dtef-figs { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; margin: 0 0 14px; }
.dtef-fig {
  margin: 0; background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px; cursor: zoom-in; transition: box-shadow .15s;
}
.dtef-fig:hover { box-shadow: 0 3px 12px rgba(42,31,18,.15); }
.dtef-fig-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.fig-badge { font-size: 11px; font-weight: 700; background: var(--accent); color: #fff5e0; border-radius: 999px; padding: 2px 9px; }
.fig-zoom { font-size: 10.5px; color: var(--muted); }
.dtef-fig img, .dtef-map-item img { width: 100%; height: auto; display: block; border-radius: 6px; background: #fff; }
.dtef-fig figcaption { font-size: 11.5px; color: var(--muted); margin-top: 8px; line-height: 1.45; }
.dtef-points { font-size: 14px; line-height: 1.75; color: var(--ink); }
.dtef-points p { margin: 0 0 10px; }
.dtef-points-list { margin: 0 0 10px; padding-left: 20px; }
.dtef-points-list li { margin-bottom: 4px; }
.dtef-points .muted { color: var(--muted); }
.dtef-map-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.dtef-map-item {
  margin: 0; background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px; cursor: zoom-in; transition: box-shadow .15s;
}
.dtef-map-item:hover { box-shadow: 0 3px 12px rgba(42,31,18,.15); }
.dtef-map-item figcaption { font-size: 12px; color: var(--muted); margin-top: 10px; line-height: 1.5; }
.dtef-map-item figcaption b { color: var(--ink); font-size: 13px; }
/* ライトボックス */
.fig-lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(20,14,8,.88);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.fig-lightbox-inner { max-width: min(1100px, 96vw); max-height: 92vh; overflow: auto; text-align: center; }
.fig-lightbox-inner img { max-width: 100%; height: auto; background: #fff; border-radius: 8px; }
.fig-lightbox-cap { color: #f5ecd8; font-size: 13px; margin-top: 12px; line-height: 1.5; }
.fig-lightbox-close {
  position: absolute; top: 14px; right: 18px; width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid rgba(245,236,216,.4); background: rgba(0,0,0,.35); color: #f5ecd8;
  font-size: 22px; line-height: 1; cursor: pointer; color: #f5ecd8;
}
@media (max-width: 860px) {
  .dtef-layout { grid-template-columns: 1fr; }
  .dtef-toc { position: static; max-height: none; }
}