/* 時代のページ（白の読みもの版・2026-10-16）
   社長「外の人に見せるから暗い雰囲気は…白を基調に、おしゃれに。動きも」
   主役は1つ：横穴の入口の形（上が丸いアーチ）に切り抜いた写真と、縦書きの題名。
   ほかは静かに。色は 白・墨・石・苔（竹の葉の緑）、時代の色（--c）は小さな印だけに使う */
:root {
  --paper: #ffffff;
  --ink: #1e262d;
  --sub: #5b6670;
  --line: #e2e5e0;
  --stone: #f3f4f1;
  --moss: #3f6b4f;
  --moss-soft: #e7efe8;
  --c: #b5653a;
  --serif: 'Shippori Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --sans: 'Zen Kaku Gothic New', 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;
  --ease: cubic-bezier(.2, .7, .2, 1);
  color-scheme: light;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 2; font-feature-settings: "palt" 0; }
img { max-width: 100%; display: block; }
a { color: var(--moss); }
button { font: inherit; color: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--moss); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 800; }
[hidden] { display: none !important; }

.wb-admin { font-size: 14px; line-height: 1.6; background: #f6e7c8; color: #3a2a10; padding: 8px 16px; text-align: center; }
.wb-admin a { color: #3a2a10; font-weight: 700; }

/* ── 入口 ── */
.er-hero { background: linear-gradient(180deg, var(--stone) 0%, var(--paper) 100%); border-bottom: 1px solid var(--line); }
.er-hero-in { max-width: 1120px; margin: 0 auto; padding: 14px 16px 40px; }
.er-back { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; font-size: 15px; color: var(--sub); text-decoration: none; }
.er-back::before { content: ""; width: 7px; height: 7px; border-left: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg); transition: transform .3s var(--ease); }
.er-back:hover { color: var(--ink); }
.er-back:hover::before { transform: translateX(-4px) rotate(45deg); }

.er-hero-grid { display: grid; gap: 28px; margin-top: 8px; }
.er-title { font-size: clamp(48px, 13vw, 64px); line-height: 1.1; letter-spacing: .08em; color: var(--ink); }
.er-title span { display: inline-block; }
.er-title::after { content: ""; display: block; width: 36px; height: 3px; margin-top: 18px; background: var(--c); border-radius: 2px; }
.er-intro { margin: 0; font-family: var(--serif); font-weight: 600; font-size: 20px; line-height: 1.9; }
.er-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 20px; margin: 24px 0 0; padding: 0; }
.er-facts div:first-child { grid-column: 1 / -1; }
.er-facts dt { font-size: 14px; color: var(--sub); line-height: 1.6; }
.er-facts dd { margin: 2px 0 0; font-size: 17px; font-weight: 500; line-height: 1.6; }
.er-facts dd span { white-space: nowrap; margin-right: .8em; }

/* 横穴の入口の形に切り抜いた写真 */
.er-arch { margin: 0; justify-self: center; width: min(78vw, 360px); }
.er-arch button { display: block; width: 100%; padding: 0; border: 0; background: var(--ink); cursor: zoom-in; border-radius: 999px 999px 10px 10px; overflow: hidden; aspect-ratio: 3 / 4; box-shadow: 0 0 0 8px var(--paper), 0 0 0 9px var(--line); }
.er-arch img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.er-arch button:hover img { transform: scale(1.04); }

/* ── 本文 ── */
.er-wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px 80px; }
.er-toc { margin: 36px 0 8px; }
.er-toc ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.er-toc a { display: inline-flex; align-items: center; min-height: 40px; padding: 4px 16px; border: 1px solid var(--line); border-radius: 999px; font-size: 15px; line-height: 1.5; color: var(--ink); text-decoration: none; background: var(--paper); transition: background-color .25s, border-color .25s, color .25s; }
.er-toc a:hover { background: var(--moss-soft); border-color: var(--moss); color: var(--moss); }

.er-step { display: grid; gap: 14px; padding: 40px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 16px; }
.er-step-h { font-size: 24px; line-height: 1.5; font-weight: 800; }
.wb-prose p { margin: 0 0 16px; text-wrap: pretty; }
.wb-prose .wb-from { display: flex; align-items: center; gap: 10px; margin: 10px 0 0; font-size: 15px; line-height: 1.6; color: var(--moss); }
.wb-prose .wb-from::before { content: ""; flex: none; width: 20px; height: 1px; background: currentColor; }
.wb-prose.is-mem { padding: 20px 22px; background: var(--stone); border-radius: 10px; }
.wb-prose.is-mem p:last-of-type { margin-bottom: 4px; }

/* 素材をそのまま並べるとき（書き直した文の無い時代） */
.wb-item + .wb-item { margin-top: 24px; }
.wb-item p { margin: 0 0 8px; overflow-wrap: anywhere; }
.wb-item-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.wb-tag { font-size: 13px; padding: 1px 10px; border-radius: 999px; border: 1px solid var(--line); line-height: 1.7; color: var(--sub); }
.wb-st { font-size: 12px; padding: 1px 8px; border-radius: 3px; background: #f6e7c8; color: #3a2a10; line-height: 1.6; }
.wb-by { font-size: 15px; color: var(--moss); }
.wb-voice { margin: 0 0 8px; padding: 14px 18px; background: var(--stone); border-radius: 10px; }
.wb-note, .wb-src { font-size: 14px; color: var(--sub); }
.wb-fig { margin: 0; }
.wb-fig button { display: block; width: 100%; padding: 0; border: 0; background: none; cursor: zoom-in; border-radius: 8px; overflow: hidden; }
.wb-fig figcaption { font-size: 14px; color: var(--sub); margin-top: 6px; }

/* ── 写真・地図 ── */
.er-block { margin-top: 64px; }
.er-h2 { font-size: 24px; line-height: 1.5; margin-bottom: 20px; }
.wb-gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.wb-gallery figure { margin: 0; position: relative; }
.wb-gallery button { display: block; width: 100%; padding: 0; border: 0; background: var(--ink); cursor: zoom-in; border-radius: 8px; overflow: hidden; }
.wb-gallery img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; transition: transform .6s var(--ease), opacity .3s; }
.wb-gallery button:hover img { transform: scale(1.06); opacity: .92; }
.wb-gallery.is-odd figure:first-child { grid-column: span 2; }
.wb-gallery.is-odd figure:first-child img { aspect-ratio: 2 / 1; }
.wb-gallery .wb-st { position: absolute; left: 6px; top: 6px; }

.wb-mapbox { display: grid; gap: 14px; }
.wb-map { height: 320px; border-radius: 12px; border: 1px solid var(--line); background: var(--stone); z-index: 0; }
.wb-places { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; align-content: start; }
.wb-places a { display: flex; gap: 14px; align-items: center; min-height: 60px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px; color: var(--ink); text-decoration: none; line-height: 1.5; transition: border-color .25s, background-color .25s; }
.wb-places a:hover { border-color: var(--moss); background: var(--moss-soft); }
.wb-places small { display: block; font-size: 14px; color: var(--moss); }
.wb-dot { flex: none; width: 12px; height: 12px; border-radius: 50%; background: var(--c); box-shadow: 0 0 0 4px color-mix(in srgb, var(--c) 22%, transparent); }
.wb-ext::after { content: ""; display: inline-block; width: 6px; height: 6px; margin-left: 8px; border-top: 1.5px solid currentColor; border-right: 1.5px solid currentColor; transform: translateY(-2px) rotate(45deg); transition: transform .25s var(--ease); }
.wb-places a:hover .wb-ext::after { transform: translate(3px, -2px) rotate(45deg); }
.wb-pin { display: block; width: 22px; height: 22px; border-radius: 50%; background: var(--c); border: 3px solid #fff; box-shadow: 0 2px 8px rgba(30,38,45,.35); }
.leaflet-container { font-family: var(--sans); }
.leaflet-popup-content { font-size: 15px; line-height: 1.6; margin: 12px 14px; }
.leaflet-popup-content a { color: var(--moss); font-weight: 700; }

.er-empty { margin-top: 40px; padding: 24px; border: 1px dashed var(--line); border-radius: 12px; color: var(--sub); }
.er-empty h2 { font-size: 22px; color: var(--ink); margin-bottom: 6px; }
.er-empty p { margin: 0; }
.er-foot { margin-top: 64px; padding: 24px; background: var(--stone); border-radius: 12px; font-size: 15px; line-height: 1.8; color: var(--sub); }
.er-foot p { margin: 0 0 8px; }
.er-foot p:last-child { margin: 0; }

/* 写真を大きく（ここだけ暗く） */
.wb-lightbox { position: fixed; inset: 0; z-index: 2000; background: rgba(18,22,26,.94); display: flex; align-items: center; justify-content: center; padding: 56px 16px 24px; }
.wb-lightbox figure { margin: 0; max-width: 100%; max-height: 100%; display: flex; flex-direction: column; gap: 8px; }
.wb-lightbox img { max-height: calc(100vh - 140px); max-width: 100%; object-fit: contain; margin: 0 auto; border-radius: 6px; }
.wb-lightbox figcaption { color: #c9d0d6; font-size: 15px; text-align: center; }
.wb-lb-close { position: absolute; top: calc(10px + env(safe-area-inset-top)); right: 12px; min-height: 48px; padding: 0 20px; background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.4); border-radius: 999px; cursor: pointer; }
.wb-lb-close:hover { background: rgba(255,255,255,.1); }

/* ── 動き（ページを開いたとき1回・スクロールで出てくる・カーソルを合わせたとき） ── */
.js-motion .er-arch button { clip-path: inset(100% 0 0 0 round 999px 999px 10px 10px); }
.js-motion .er-arch img { transform: scale(1.12); }
.js-motion .er-title span { opacity: 0; transform: translateY(14px); }
.js-motion .er-title::after { transform: scaleX(0); transform-origin: left; }
.js-motion .er-lead { opacity: 0; transform: translateY(10px); }
.is-in .er-arch button { clip-path: inset(0 0 0 0 round 999px 999px 10px 10px); transition: clip-path 1.3s var(--ease) .1s; }
.is-in .er-arch img { transform: scale(1); transition: transform 2.2s var(--ease) .1s; }
.is-in .er-title span { opacity: 1; transform: none; transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: calc(.35s + var(--i) * .09s); }
.is-in .er-title::after { transform: scaleX(1); transition: transform .8s var(--ease) .8s; }
.is-in .er-lead { opacity: 1; transform: none; transition: opacity .8s var(--ease) .75s, transform .8s var(--ease) .75s; }
.js-motion [data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.js-motion [data-reveal].is-shown { opacity: 1; transform: none; }

@media (min-width: 600px) {
  .er-facts { grid-template-columns: auto auto auto; justify-content: start; gap: 14px 40px; }
  .er-facts div:first-child { grid-column: auto; }
  .wb-gallery { grid-template-columns: repeat(min(var(--n, 3), 5), minmax(0, 1fr)); }
  .wb-gallery.is-odd figure:first-child { grid-column: auto; }
  .wb-gallery.is-odd figure:first-child img { aspect-ratio: 3 / 4; }
}
@media (min-width: 900px) {
  .er-hero-in { padding: 20px 32px 64px; }
  /* 縦書きの題名 ｜ 説明 ｜ アーチの写真 */
  .er-hero-grid { grid-template-columns: auto minmax(0, 1fr) 380px; align-items: end; gap: 48px; margin-top: 24px; }
  .er-title { writing-mode: vertical-rl; font-size: clamp(88px, 9vw, 120px); letter-spacing: .12em; line-height: 1; align-self: start; }
  .er-title::after { display: none; }
  .er-lead::before { content: ""; display: block; width: 36px; height: 3px; margin-bottom: 22px; background: var(--c); border-radius: 2px; }
  .js-motion .er-title span { transform: translateX(-14px); }
  .er-lead { padding-bottom: 12px; }
  .er-intro { font-size: 24px; }
  .er-arch { width: 100%; }
  .er-wrap { padding: 0 32px 96px; }
  .er-toc, .er-steps { max-width: 880px; margin-inline: auto; }
  .er-toc { margin-top: 48px; }
  /* 見出しを左に置き、読んでいるあいだ付いてくる */
  .er-step { grid-template-columns: 220px minmax(0, 1fr); gap: 40px; padding: 52px 0; }
  .er-step-h { position: sticky; top: 24px; align-self: start; font-size: 22px; }
  .er-block { margin-top: 88px; }
  .wb-mapbox { grid-template-columns: 1.6fr 1fr; }
  .wb-map { height: 400px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js-motion .er-arch button, .js-motion .er-arch img, .js-motion .er-title span, .js-motion .er-title::after, .js-motion .er-lead, .js-motion [data-reveal] { clip-path: none; transform: none; opacity: 1; transition: none; }
  .er-arch img, .wb-gallery img { transition: none; }
}

/* fresh-eyes（10/16）：本文を少し大きく・写真と地図を本文の列にそろえる・iPad で1行を長くしすぎない */
.er-step-body { font-size: 17px; letter-spacing: .02em; }
@media (min-width: 600px) and (max-width: 899px) {
  .er-toc, .er-steps, .er-block { max-width: 640px; margin-inline: auto; }
  .er-arch { width: min(60vw, 380px); }
}
@media (min-width: 900px) {
  .er-step-body { font-size: 18px; }
  .er-block, .er-foot { max-width: 880px; margin-inline: auto; }
}
/* このページ1枚で完結（社長 10/16「今はそれぞれのページだけでいい」）。上の小さな名前は、リンクにしない */
.er-site { margin: 0; min-height: 44px; display: flex; align-items: center; font-size: 15px; color: var(--sub); letter-spacing: .04em; }