/* ガイドネタ帳（rekishi-neta.jp/guide-notes/）。見た目は大学ノート（owner 判断 2026-09-26・issue #208）。
   白い紙に薄い青の罫線、左に赤いマージンの線、表紙の青を強調に、最終確認前は蛍光ペンの黄色。 */
:root{
  --ink:#1E2329; --sub:#374151; --muted:#5B6675; --line:#D5DCE6; --line2:#DDE3EB;
  --ground:#F4F6F9; --paper:#FFFFFF; --rule:#DDE6F1; --margin:#E7A3A3;
  --blue:#1F4E9A; --blue-d:#163A75; --red:#C4413A; --hl:#FFEE8A; --hl-ink:#3D3500;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
.hero>*,.two>*,.side>*,.phd>*,.row>*,.rk>*,.enter>*,.atiles>*,.lists>*,.ccards>*,.plists>*,.grid2>*{min-width:0}  /* ★格子の中身を縮められるように（狭い画面で横にはみ出していた） */  /* ★display を持つ枠でも hidden を効かせる（言語のタブで両方の本文が出ていた） */
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ground);color:var(--ink);font-family:"Zen Kaku Gothic New",system-ui,sans-serif;line-height:1.7}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-d);text-decoration:underline}
h1,h2,h3{margin:0;font-weight:900;line-height:1.4}
p{margin:0}
.en{font-family:"IBM Plex Sans",system-ui,sans-serif}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace}
.muted{color:var(--muted);font-size:14px}
.small{font-size:13px}
.c{text-align:center}
.wrap{max-width:1280px;margin:0 auto;padding:0 32px}
main{padding-bottom:72px}

/* ノートの紙 */
.sheet{position:relative;background-color:var(--paper);background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 31px,var(--rule) 31px,var(--rule) 32px);
  border:1px solid var(--line);border-radius:6px;padding:24px 24px 24px 56px}
.sheet::before{content:"";position:absolute;top:0;bottom:0;left:36px;border-left:1.5px solid var(--margin)}

.lab{font-family:"IBM Plex Mono",monospace;font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--blue)}
.no{font-family:"IBM Plex Mono",monospace;font-weight:600;color:var(--red);font-size:18px}
.no.big{font-size:34px;line-height:1}
.chip{display:inline-flex;align-items:center;height:26px;padding:0 10px;border:1px solid #CBD5E1;border-radius:13px;font-size:13px;color:var(--sub);background:#fff;white-space:nowrap}
.chips{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.hl{flex:none;white-space:nowrap;display:inline-flex;align-items:center;height:22px;padding:0 8px;border-radius:2px;font-size:12px;font-weight:700;color:var(--hl-ink);background:var(--hl);width:fit-content}

/* ボタン */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 20px;border-radius:6px;font-size:15px;font-weight:700;font-family:inherit;cursor:pointer;border:1px solid transparent;text-decoration:none;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn.small{min-height:40px;padding:0 14px;font-size:13px}
.btn.big{min-height:58px;font-size:16px;width:100%}
.btn.wide{width:100%}
.primary{background:var(--blue);color:#fff}
.primary:hover{background:var(--blue-d);color:#fff}
.ghost{background:#fff;color:var(--ink);border-color:#9AA8BA}
.ghost:hover{border-color:var(--blue);color:var(--blue)}
.off{background:#EEF1F5;color:var(--muted);border-color:var(--line);cursor:default}
.icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:6px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer}
.save.on{color:var(--blue);border-color:var(--blue)}
.save.on svg{fill:currentColor}
:focus-visible{outline:3px solid #8FB3EA;outline-offset:2px}

/* ヘッダー・フッター */
.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.topin{height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:12px;color:var(--ink)}
.logo:hover{text-decoration:none;color:var(--ink)}
.cover{width:36px;height:36px;flex:none}
.lt{display:flex;flex-direction:column;line-height:1.2}
.lt b{font-size:19px;letter-spacing:.04em}
.lt .en{font-size:11px;color:var(--muted);letter-spacing:.05em}
.nav{display:flex;align-items:center;gap:26px;font-size:15px}
.nav a{color:var(--ink);font-weight:500}
.nav a[aria-current]{color:var(--blue);font-weight:700}
.mylink{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:0 14px;border:1px solid #CBD5E1;border-radius:20px;color:var(--blue)!important;font-weight:700!important}
.mycount{font-size:12px;color:var(--muted)}
.foot{background:var(--ink);color:#C9D1DC;margin-top:24px}
.footin{padding:40px 32px;display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap}
.fl{display:flex;flex-direction:column;gap:4px;font-size:13px}
.fl b{color:#fff;font-size:18px}
.fn{display:flex;gap:24px;flex-wrap:wrap;font-size:14px}
.fn a{color:#C9D1DC}

/* 入口 */
.hero{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:40px;align-items:center;padding-top:64px;padding-bottom:48px}
.hero h1{font-size:56px;line-height:1.35;margin:18px 0 18px}
.lead{font-size:20px;color:var(--sub);margin-bottom:12px}
.lede{font-size:17px;line-height:2;color:var(--sub);max-width:600px}
.stats{display:flex;margin-top:24px;background:#fff;border:1px solid var(--line);border-radius:6px;width:fit-content}
.stats div{display:flex;flex-direction:column;padding:12px 24px;border-right:1px solid var(--line2)}
.stats div:last-child{border-right:0}
.stats b{font-size:28px;font-weight:600;line-height:1.2}
.stats span{font-size:12px;color:var(--muted)}
.guestnote{display:flex;flex-direction:column;gap:8px;font-size:15px}
.guestnote b{font-size:17px}
.search{display:flex;align-items:center;gap:12px;padding:12px;background:#fff;border:1.5px solid var(--ink);border-radius:8px;margin-bottom:40px}
.search label{flex:none;padding:0 8px;font-weight:700}
.search input{flex:1;min-width:0;height:50px;padding:0 16px;border:1px solid var(--line);border-radius:6px;font-size:16px;font-family:inherit;background:var(--ground)}
.enter{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-bottom:56px}
.ecard{display:flex;flex-direction:column;gap:8px;color:var(--ink)}
.ecard:hover{text-decoration:none;border-color:var(--blue)}
.ecard b{font-size:21px}
.ecard span:last-child{font-size:14px;color:#4B5563}
.band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:48px 0;margin-bottom:48px}
.hd{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px}
.hd h2{font-size:28px}
.atiles{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.atile{display:flex;flex-direction:column;gap:8px;padding:18px 18px 18px 22px;background:#fff;border:1px solid var(--line);border-left:8px solid var(--c);border-radius:6px;color:var(--ink)}
.atile:hover{text-decoration:none;border-color:var(--c)}
.an{display:flex;justify-content:space-between;align-items:baseline}
.an b{font-size:21px}
.an span{font-size:13px;color:var(--muted)}
.al{font-size:13px;color:#4B5563;line-height:1.8}
.two{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:32px;align-items:start}
.howto{display:flex;flex-direction:column;gap:14px}
.howto h2{font-size:20px}
.legend{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;font-weight:700;font-size:14px}
.legend li{display:flex;gap:10px;align-items:center}
.legend i{width:10px;height:10px;display:inline-block}
.legend i.o{border:2px solid var(--muted)}

/* 一覧の行 */
.row{display:grid;grid-template-columns:72px minmax(0,1fr) 190px 124px 44px;gap:16px;align-items:center;padding:14px 0;border-top:1px solid var(--line2)}
.rowmain{display:flex;flex-direction:column;gap:6px}
.rowtitle{font-size:16px;font-weight:700;line-height:1.6;color:var(--ink)}
.rk{display:grid;grid-template-columns:64px minmax(0,1fr);align-items:center}
.rn{font-size:32px;font-weight:600}
.rk:first-child .rn{color:var(--red)}
.rk .row{border-top:0}
.rk{border-top:1px solid var(--line2)}

/* 見出し・タブ */
.pagehd{padding-top:28px;padding-bottom:24px;display:flex;flex-direction:column;gap:12px}
.pagehd h1{font-size:44px}
.crumb{font-size:14px;color:var(--muted)}
.hdrow{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.tabs{display:flex;gap:6px;align-items:flex-end;border-bottom:1px solid var(--line);flex-wrap:wrap}
.tab{display:flex;align-items:center;min-height:40px;padding:0 14px;border-radius:6px 6px 0 0;border:1px solid var(--line);border-bottom:0;border-top:4px solid var(--c);background:#EEF1F5;color:var(--ink);font-size:14px}
.tab.on{background:#fff;font-weight:900}
.tab:hover{text-decoration:none}
.note{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--sub)}
.side{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:32px;align-items:start}
.side.paper{grid-template-columns:minmax(0,8fr) minmax(0,4fr)}
.idx{display:flex;flex-direction:column;position:sticky;top:88px}
.pl{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-bottom:1px solid #E6EBF1;font-size:14px;color:var(--ink)}
.blocks{display:flex;flex-direction:column;gap:36px}
.pbhd{display:flex;align-items:baseline;gap:14px;padding-bottom:8px;border-bottom:1.5px solid var(--ink)}
.pbhd h2{font-size:22px}
.pbhd h2 a{color:var(--ink)}
.plists{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.plist h2{font-size:22px;margin-bottom:8px}
.plist h2 a{color:var(--ink)}
.ccards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.ccard{display:flex;justify-content:space-between;align-items:baseline;color:var(--ink)}
.ccard b{font-size:19px}

/* 紙1本 */
.phd{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:32px;align-items:end}
.phl{display:flex;flex-direction:column;gap:14px}
.phl h1{font-size:34px;line-height:1.55}
.phr{display:flex;flex-direction:column;gap:10px}
.two-btn{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.two-btn .btn{white-space:normal;padding:0 10px;text-align:center}
.pendnote{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;background:#FFF6BF;border:1px solid #EBD96A;border-radius:6px;font-size:14px;color:var(--hl-ink)}
.intro{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}
.ij{font-size:20px;line-height:1.9;font-weight:700}
.ie{font-size:17px;line-height:1.6;color:var(--sub)}
.langs{display:flex;gap:6px;border-bottom:1.5px solid var(--ink);margin-bottom:16px}
.langs button{min-height:42px;padding:0 18px;border:0;border-radius:6px 6px 0 0;background:transparent;font-family:inherit;font-size:14px;cursor:pointer;color:var(--ink)}
.langs button[aria-selected="true"]{background:var(--ink);color:#fff;font-weight:700}
.story{display:flex;flex-direction:column;gap:6px;font-size:17px;line-height:2.05;color:#262B31}
.story.en{line-height:1.75}
.story[dir="rtl"]{text-align:right}
.records{margin-top:32px;display:flex;flex-direction:column;gap:14px}
.records .src{border-top:1.5px solid var(--ink);padding-top:10px}
.records h3{font-size:16px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.records h3 a{color:var(--ink)}
.quotes{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.quotes blockquote{margin:0;padding:10px 14px;background:#fff;border-left:3px solid #9AA8BA;font-size:15px;line-height:1.9}
.qmeta{display:flex;gap:14px;flex-wrap:wrap;align-items:center;font-size:13px;color:var(--muted);padding:4px 0 0 17px}
.forguide{margin-top:28px;padding:22px 26px;background:var(--ink);color:#E5EAF0;border-radius:8px;display:flex;flex-direction:column;gap:8px;font-size:15px}
.forguide .lab{color:#9DB9E6}
.aside{display:flex;flex-direction:column;gap:22px}
.about{display:flex;flex-direction:column}
.kv{display:flex;justify-content:space-between;gap:12px;min-height:32px;align-items:center;font-size:14px}
.kv span:first-child{color:var(--muted);flex:none}
.kv span:last-child{text-align:right}
.rels{display:flex;flex-direction:column}
.rel{display:flex;flex-direction:column;gap:2px;padding:12px 0;border-top:1px solid var(--line2);color:var(--ink)}
.rel span{font-size:12px;color:var(--muted)}
.rel b{font-size:15px;line-height:1.6}
.report{display:flex;flex-direction:column;gap:6px;padding:18px 20px;border:1px dashed #9AA8BA;border-radius:8px;font-size:13px}
.notice{display:flex;flex-direction:column;gap:6px;font-size:14px;margin-top:24px}
.prose{max-width:820px;display:flex;flex-direction:column;gap:16px;font-size:16px;line-height:2}
.prose h2{font-size:22px;margin-top:16px}
.prose ul{margin:0;padding-left:1.2em}
.report-form{display:flex;flex-direction:column;gap:8px;font-size:15px}
.report-form fieldset{border:0;padding:0;margin:0 0 6px;display:flex;gap:20px;flex-wrap:wrap}
.report-form legend{font-weight:700;margin-bottom:4px}
.report-form label{font-weight:700}
.report-form fieldset label{font-weight:500}
.report-form input[type=text],.report-form input[type=email],.report-form textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:6px;font-size:16px;font-family:inherit;background:#fff}
.report-form .btn{align-self:flex-start;margin-top:6px}

/* マイリスト */
.lists{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.lcard{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;color:var(--ink);text-align:left;font-family:inherit;padding:0;cursor:pointer}
.lcard .lc{height:110px;background:var(--c,var(--blue));display:flex;align-items:flex-end;padding:0 16px}
.lcard .lc span{width:60px;height:78px;background:#fff;border-radius:3px 3px 0 0;box-shadow:0 6px 14px rgba(0,0,0,.15);margin-right:6px}
.lcard .lb{padding:16px;display:flex;flex-direction:column;gap:4px}
.lcard .lb b{font-size:17px}
.newcard{min-height:200px;border:1.5px dashed #9AA8BA;border-radius:8px;background:transparent;color:var(--blue);font-weight:700;font-size:16px;font-family:inherit;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}
.ldetail{display:flex;flex-direction:column;gap:16px}
.lacts{display:flex;gap:10px;flex-wrap:wrap}
.litem{display:grid;grid-template-columns:minmax(0,1fr) auto 44px;gap:12px;align-items:center;padding:12px 0;border-top:1px solid var(--line2)}
.litem a{color:var(--ink);font-weight:700}
.litem .meta{font-size:12px;color:var(--muted)}
.import{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:#FFF6BF;border:1px solid #EBD96A;border-radius:8px;margin-bottom:20px}

/* 保存先を選ぶ（Google マップの「保存」を手本に） */
dialog#savesheet{border:0;padding:0;border-radius:14px;width:min(440px,100vw);max-height:90vh;box-shadow:0 12px 40px rgba(0,0,0,.25)}
dialog#savesheet::backdrop{background:rgba(20,26,34,.45)}
.sheet-in{display:flex;flex-direction:column;padding-bottom:18px}
.grab{width:40px;height:5px;border-radius:3px;background:#CBD5E1;margin:10px auto 2px}
.sheet-hd{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:10px 20px 12px}
.sheet-hd b{font-size:18px}
.sheet-hd span{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60%}
.srow{display:flex;align-items:center;gap:14px;min-height:58px;padding:0 20px;border-top:1px solid #E6EBF1;cursor:pointer}
.srow .sw{flex:none;width:38px;height:38px;border-radius:8px;background:var(--c,var(--blue));display:flex;align-items:center;justify-content:center;color:#fff}
.srow .sn{flex:1;display:flex;flex-direction:column}
.srow .sn b{font-size:15px}
.srow .sn span{font-size:12px;color:var(--muted)}
.srow input{width:22px;height:22px;accent-color:var(--blue)}
.newlist{padding:14px 20px 16px;border-top:1px solid #E6EBF1;display:flex;flex-direction:column;gap:6px}
.newlist label{font-size:13px;font-weight:700}
.nl{display:flex;gap:8px}
.nl input{flex:1;min-width:0;height:44px;padding:0 12px;border:1px solid var(--line);border-radius:6px;font-size:15px;font-family:inherit}
.sheet-in .wide{margin:0 20px;width:auto}

/* 検索の結果 */
.result{padding:14px 0;border-top:1px solid var(--line2);display:flex;flex-direction:column;gap:4px}
.result a{font-weight:700;font-size:16px;color:var(--ink)}

/* れきしねたの入口 */
.root .rootin{padding-top:96px;padding-bottom:48px;display:flex;flex-direction:column;gap:56px}
.brand{font-size:76px;letter-spacing:.1em;display:flex;flex-direction:column;gap:8px}
.brand .en{font-size:20px;color:var(--muted);letter-spacing:.08em;font-weight:500}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.card{display:flex;flex-direction:column;gap:14px;padding:36px 36px 36px 64px;color:var(--ink)}
.card:hover{text-decoration:none;border-color:var(--blue)}
.card .ct{font-size:34px}
.card .go{font-weight:700;color:var(--blue)}

/* スマートフォン */
@media (max-width: 900px){
  .wrap{padding:0 16px}
  .nav a:not(.mylink){display:none}
  .mylink .ml-t,.lt .en{display:none}
  .mylink{padding:0 10px}
  .topin{height:58px}
  .hero{grid-template-columns:1fr;padding-top:28px;gap:20px}
  .hero h1{font-size:34px}
  .lead{font-size:16px}
  .stats{width:100%}
  .stats div{flex:1;padding:10px 12px}
  .stats b{font-size:22px}
  .search{flex-wrap:wrap}
  .search label{width:100%}
  .enter,.atiles,.ccards,.lists{grid-template-columns:repeat(2,minmax(0,1fr))}
  .two,.side,.side.paper,.phd,.plists,.grid2{grid-template-columns:1fr}
  .idx{position:static}
  .row{grid-template-columns:minmax(0,1fr) 44px;grid-template-areas:"main save" "chips chips" "act act";row-gap:8px}
  .row .no{display:none}
  .row .rowmain{grid-area:main}
  .row .chips{grid-area:chips}
  .row > .btn{grid-area:act;width:100%}
  .row .save{grid-area:save}
  .pagehd h1{font-size:30px}
  .phl h1{font-size:24px}
  .sheet{padding:18px 16px 18px 40px}
  .sheet::before{left:24px}
  .brand{font-size:48px}
  dialog#savesheet{margin:auto auto 0;border-radius:16px 16px 0 0;width:100vw;max-width:100vw}
}
@media print{.top,.foot,.save,.mylink{display:none}}

/* フォームの機械よけ（人には見えない欄。入力があれば送らない） */
.hp{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}