/* ============================================================
   井戸平左衛門研究所 公式サイト
   共通スタイル
   基調色: ダークレッド #8B1A1A / 生成り #FAF6EE
   ============================================================ */

:root {
  --ink: #8B1A1A;
  --ink-dark: #6E1414;
  --ink-soft: #A83030;
  --paper: #FAF6EE;
  --paper-warm: #F3EBD8;
  --card: #FFFFFF;
  --sumi: #1B1613;
  --sumi-sub: #3A2E28;
  --rule: #D9CFB8;
  --rule-soft: #EADFC7;

  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans:  "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;

  --base-size: 18px;      /* SP 本文 */
  --lh-body: 1.9;
  --content-max: 720px;   /* 本文コラム最大幅 */
  --wide-max: 1080px;     /* ワイドコンテンツ */

  --shadow-soft: 0 2px 12px rgba(30, 20, 15, 0.06);
  --shadow-card: 0 4px 20px rgba(30, 20, 15, 0.08);
}

/* リセット系 */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: var(--base-size);
  line-height: var(--lh-body);
  color: var(--sumi);
  background: var(--paper);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  padding-bottom: 88px; /* 固定CTAバーぶん */
}
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; font-size: inherit; cursor: pointer; }
a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
a:hover, a:focus-visible { color: var(--ink-dark); text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }

/* 文字大きくボタン適用時 */
body.text-lg { font-size: 22px; }
body.text-lg .lead { font-size: 22px; }
body.text-lg h2 { font-size: 34px; }
body.text-lg h3 { font-size: 26px; }
body.text-lg .btn-primary { font-size: 22px; }

/* ========== スキップリンク ========== */
.skiplink {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 12px 20px;
  z-index: 999;
}
.skiplink:focus { left: 12px; top: 12px; }

/* ========== ヘッダー ========== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  max-width: var(--wide-max);
  margin: 0 auto;
  gap: 12px;
}
.site-header__logo {
  display: inline-flex;
  align-items: center;
  padding: 6px 8px;
  border-radius: 4px;
  text-decoration: none;
  min-height: 48px;
}
.site-header__logo img {
  height: 42px;
  width: auto;
}
@media (min-width: 768px) {
  .site-header__logo img { height: 52px; }
}
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 4px;
  color: var(--ink);
}
.nav-toggle[aria-expanded="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.nav-toggle svg { width: 24px; height: 24px; }

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0; right: 0;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 8px 0 16px;
}
.site-nav.is-open { display: block; }
.site-nav ul { list-style: none; margin: 0; padding: 0; }
.site-nav li { border-top: 1px solid var(--rule-soft); }
.site-nav a {
  display: flex;
  align-items: center;
  min-height: 56px;
  padding: 12px 24px;
  color: var(--sumi);
  text-decoration: none;
  font-family: var(--font-serif);
  font-size: 18px;
}
.site-nav a:hover, .site-nav a:focus-visible {
  background: var(--paper-warm);
  color: var(--ink);
}
@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav {
    display: block !important;
    position: static;
    padding: 0;
    background: transparent;
    border: none;
  }
  .site-nav ul { display: flex; gap: 4px; }
  .site-nav li { border: none; }
  .site-nav a {
    min-height: 48px;
    padding: 8px 16px;
    font-size: 17px;
  }
}

/* ========== 本体レイアウト ========== */
main { padding-top: 76px; }
@media (min-width: 768px) { main { padding-top: 88px; } }

.section {
  padding: 56px 20px;
  max-width: var(--content-max);
  margin: 0 auto;
}
.section--wide {
  max-width: var(--wide-max);
  padding-inline: 20px;
}
.section--paper-warm {
  background: var(--paper-warm);
  max-width: none;
  padding-inline: 0;
}
.section--paper-warm > .section__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== タイポグラフィ ========== */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--sumi);
  line-height: 1.5;
  letter-spacing: 0.02em;
  text-wrap: pretty;
}
h2 {
  font-size: 28px;
  margin: 0 0 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
}
@media (min-width: 768px) { h2 { font-size: 32px; } }

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
}
.section-heading__num {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--ink);
  font-weight: 500;
  flex-shrink: 0;
}
.section-heading h2 {
  margin: 0;
  padding: 0;
  border: none;
  font-size: 26px;
  flex: 1;
}
@media (min-width: 768px) {
  .section-heading__num { font-size: 26px; }
  .section-heading h2 { font-size: 30px; }
}

h3 {
  font-size: 22px;
  margin: 32px 0 12px;
  color: var(--ink-dark);
}
@media (min-width: 768px) { h3 { font-size: 24px; } }

p { margin: 0 0 1em; }
p + p { margin-top: 0.5em; }

.lead {
  font-size: 19px;
  line-height: 1.9;
  color: var(--sumi);
}
@media (min-width: 768px) { .lead { font-size: 20px; } }

.eyebrow {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.2em;
  color: var(--ink);
  margin-bottom: 12px;
  padding: 4px 12px;
  border: 1px solid var(--ink);
  border-radius: 999px;
}

/* 芋づるの区切り */
.tsuru-divider {
  display: block;
  width: 100%;
  max-width: 320px;
  height: 20px;
  margin: 32px auto;
  color: var(--ink);
}
.tsuru-divider svg { width: 100%; height: 100%; display: block; }

/* ========== ボタン ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 12px 28px;
  background: var(--ink);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 500;
  text-decoration: none;
  border: 2px solid var(--ink);
  border-radius: 4px;
  transition: background 0.2s;
  text-align: center;
  line-height: 1.4;
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--ink-dark);
  border-color: var(--ink-dark);
  color: #fff;
  text-decoration: none;
}
.btn-primary__sub {
  display: block;
  font-size: 14px;
  font-weight: 400;
  margin-top: 2px;
  opacity: 0.9;
}
.btn-note {
  display: block;
  font-size: 15px;
  color: var(--sumi-sub);
  margin-top: 10px;
  text-align: center;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 8px 20px;
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--ink);
  border-radius: 4px;
  text-decoration: none;
  font-family: var(--font-serif);
  font-size: 17px;
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  background: var(--ink);
  color: #fff;
  text-decoration: none;
}

/* ========== ヒーロー ========== */
.hero {
  padding: 32px 0 56px;
  background: var(--paper);
}
.hero__inner {
  max-width: var(--wide-max);
  margin: 0 auto;
  padding: 0 20px;
}
.hero__heading-block {
  max-width: var(--content-max);
  margin: 0 auto 32px;
  padding: 0;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: 30px;
  line-height: 1.5;
  margin: 12px 0 20px;
  color: var(--sumi);
  letter-spacing: 0.03em;
}
@media (min-width: 768px) { .hero h1 { font-size: 42px; } }

.hero__lead {
  font-size: 18px;
  line-height: 1.95;
  color: var(--sumi);
}
@media (min-width: 768px) { .hero__lead { font-size: 20px; } }

.hero__image-wrap {
  margin: 32px auto 32px;
  max-width: var(--wide-max);
}
.hero__image-wrap img {
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  box-shadow: var(--shadow-soft);
}
.hero__cta {
  max-width: var(--content-max);
  margin: 0 auto;
  text-align: center;
}
.hero__cta .btn-primary { min-width: 280px; }

.image-zoom {
  cursor: zoom-in;
  position: relative;
}
.image-zoom::after {
  content: "タップで拡大";
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(27, 22, 19, 0.82);
  color: #fff;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 4px;
  pointer-events: none;
}

/* ========== 3ステップ図 ========== */
.steps {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: grid;
  gap: 20px;
}
@media (min-width: 720px) {
  .steps { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}
.step {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow-soft);
}
.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 22px;
  margin-bottom: 12px;
}
.step__title {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--ink-dark);
  margin: 0 0 8px;
}
.step__body {
  font-size: 17px;
  line-height: 1.8;
  margin: 0;
  color: var(--sumi);
}
.steps-close {
  margin-top: 24px;
  padding: 20px;
  background: var(--paper-warm);
  border-left: 4px solid var(--ink);
  font-size: 18px;
  color: var(--sumi);
}

/* ========== リスト（お待ちしています） ========== */
.check-list {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}
.check-list li {
  position: relative;
  padding: 12px 0 12px 40px;
  border-bottom: 1px dashed var(--rule);
  font-size: 18px;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 8px; top: 22px;
  width: 20px; height: 20px;
  background: var(--ink);
  clip-path: polygon(0 45%, 40% 100%, 100% 10%, 85% 0, 40% 70%, 15% 30%);
}
.note {
  font-size: 16px;
  color: var(--sumi-sub);
  margin-top: 12px;
}

/* ========== 参加の流れ（順序リスト） ========== */
.flow {
  list-style: none;
  counter-reset: flow;
  padding: 0;
  margin: 24px 0 0;
}
.flow > li {
  counter-increment: flow;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.flow > li::before {
  content: counter(flow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 18px;
  background: var(--paper);
}
.flow__body { font-size: 18px; line-height: 1.75; padding-top: 4px; }
.flow__body strong { color: var(--ink-dark); font-weight: 600; }

/* ========== 折りたたみ ========== */
details.disclosure {
  margin-top: 24px;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: 4px;
}
details.disclosure > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 56px;
  padding: 12px 20px;
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--ink-dark);
  list-style: none;
}
details.disclosure > summary::-webkit-details-marker { display: none; }
details.disclosure > summary::after {
  content: "＋";
  font-size: 22px;
  color: var(--ink);
}
details.disclosure[open] > summary::after { content: "－"; }
details.disclosure > div {
  padding: 4px 20px 20px;
  font-size: 17px;
  line-height: 1.85;
}

/* ========== FAQ アコーディオン ========== */
.faq { margin-top: 24px; }
.faq details {
  border-top: 1px solid var(--rule);
}
.faq details:last-child { border-bottom: 1px solid var(--rule); }
.faq summary {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 64px;
  padding: 16px 12px 16px 8px;
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--sumi);
  list-style: none;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "Q";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 18px;
}
.faq summary::after {
  content: "＋";
  margin-left: auto;
  font-size: 24px;
  color: var(--ink);
  flex-shrink: 0;
}
.faq details[open] summary::after { content: "－"; }
.faq__body {
  display: flex;
  gap: 16px;
  padding: 0 12px 20px 8px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--sumi);
}
.faq__body::before {
  content: "A";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--paper-warm);
  color: var(--ink-dark);
  border: 1.5px solid var(--ink);
  font-family: var(--font-serif);
  font-size: 18px;
}

/* ========== お求め価格ボックス ========== */
.price-box {
  margin: 24px 0;
  padding: 24px;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  border-radius: 4px;
}
.price-formula {
  font-family: var(--font-serif);
  font-size: 20px;
  text-align: center;
  color: var(--ink-dark);
  padding: 20px 8px;
  margin: 16px 0;
  background: var(--card);
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  line-height: 1.8;
}
@media (min-width: 768px) { .price-formula { font-size: 24px; } }

/* ========== 会員種類 ========== */
.member-primary {
  margin: 24px 0;
  padding: 28px 24px;
  background: var(--ink);
  color: #fff;
  border-radius: 4px;
}
.member-primary__label {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.2em;
  padding: 4px 14px;
  border: 1px solid #fff;
  border-radius: 999px;
  margin-bottom: 12px;
}
.member-primary__title {
  font-family: var(--font-serif);
  font-size: 30px;
  margin: 0 0 12px;
  color: #fff;
}
.member-primary__fee {
  font-size: 20px;
  margin-bottom: 12px;
  color: #fff;
}
.member-primary__fee strong { font-size: 24px; font-weight: 600; }
.member-primary__body {
  font-size: 17px;
  line-height: 1.85;
  color: #fff;
  opacity: 0.95;
  margin-bottom: 0;
}
.member-primary__note {
  font-size: 15px;
  color: #fff;
  opacity: 0.85;
  margin-top: 8px;
}

.member-other {
  margin-top: 16px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}
.member-other__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 16px 20px;
  gap: 12px;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 16px;
}
.member-other__row:last-child { border-bottom: none; }
.member-other__row dt {
  font-family: var(--font-serif);
  color: var(--ink-dark);
  font-weight: 600;
  margin: 0;
}
.member-other__row dd {
  margin: 0;
  color: var(--sumi);
}
.member-payment {
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--paper-warm);
  border-radius: 4px;
  font-size: 16px;
  color: var(--sumi);
}

/* ========== 井戸公の物語 ========== */
.story {
  background: var(--card);
  border: 1px solid var(--rule);
  padding: 32px 24px;
  margin: 24px 0;
  box-shadow: var(--shadow-soft);
}
.story h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--ink-dark);
  padding-left: 16px;
  border-left: 4px solid var(--ink);
  margin: 24px 0 16px;
}
.story h3:first-child { margin-top: 0; }
.story p {
  font-size: 17px;
  line-height: 2.0;
  color: var(--sumi);
  text-indent: 1em;
}
@media (min-width: 768px) {
  .story { padding: 40px 40px; }
  .story p { font-size: 18px; }
}
.story-highlight {
  margin-top: 20px;
  padding: 20px;
  background: var(--paper-warm);
  border: 2px solid var(--ink);
  border-radius: 4px;
  text-align: center;
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--ink-dark);
  line-height: 1.7;
}
@media (min-width: 768px) { .story-highlight { font-size: 22px; } }

/* ========== 芋づるネットワーク ========== */
.map-locations {
  margin-top: 16px;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  font-size: 17px;
  line-height: 2.0;
  color: var(--sumi);
}
.map-locations__label {
  font-family: var(--font-serif);
  color: var(--ink-dark);
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
}

/* ========== 二つの伝統野菜 ========== */
.imo-pair {
  display: grid;
  gap: 20px;
  margin: 24px 0;
}
@media (min-width: 640px) { .imo-pair { grid-template-columns: 1fr 1fr; } }
.imo-card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
}
.imo-card__img {
  width: 100%;
  height: 180px;
  background: var(--paper-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sumi-sub);
  font-size: 14px;
  text-align: center;
  border-bottom: 1px solid var(--rule);
}
.imo-card__body { padding: 20px; }
.imo-card__title {
  font-family: var(--font-serif);
  font-size: 20px;
  color: var(--ink-dark);
  margin: 0 0 8px;
}
.imo-card__body p { font-size: 16px; margin: 0; line-height: 1.8; }

.book-refs {
  margin-top: 24px;
  padding: 20px;
  background: var(--paper-warm);
  border-left: 4px solid var(--ink);
}
.book-refs__label {
  font-family: var(--font-serif);
  color: var(--ink-dark);
  font-size: 16px;
  display: block;
  margin-bottom: 8px;
}
.book-refs p { margin: 0; font-size: 16px; line-height: 1.85; }

/* ========== 理念（4軸） ========== */
.principle-quote {
  font-family: var(--font-serif);
  font-size: 24px;
  color: var(--ink-dark);
  text-align: center;
  padding: 24px;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  margin: 24px 0;
  line-height: 1.6;
}
@media (min-width: 768px) { .principle-quote { font-size: 28px; } }

.axes {
  list-style: none;
  padding: 0;
  margin: 24px 0;
  display: grid;
  gap: 16px;
}
@media (min-width: 640px) { .axes { grid-template-columns: 1fr 1fr; } }
.axis {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 20px;
}
.axis__title {
  font-family: var(--font-serif);
  font-size: 19px;
  color: var(--ink-dark);
  margin: 0 0 8px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.axis__title small {
  font-size: 14px;
  color: var(--ink);
  font-weight: 400;
}
.axis__body { margin: 0; font-size: 16px; line-height: 1.8; }

/* ========== 事業内容 ========== */
.business-list {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  counter-reset: biz;
}
.business-list li {
  padding: 12px 0 12px 44px;
  position: relative;
  border-bottom: 1px dashed var(--rule);
  font-size: 17px;
  line-height: 1.8;
}
.business-list li::before {
  counter-increment: biz;
  content: counter(biz, cjk-ideographic);
  position: absolute;
  left: 0; top: 12px;
  font-family: var(--font-serif);
  color: var(--ink);
  font-size: 18px;
  width: 32px;
  text-align: center;
}

/* ========== 概要・役員 ========== */
.org-info {
  background: var(--card);
  border: 1px solid var(--rule);
  padding: 24px;
  margin: 20px 0;
}
.org-info dl {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px 20px;
}
@media (min-width: 640px) {
  .org-info dl { grid-template-columns: 140px 1fr; }
}
.org-info dt {
  font-family: var(--font-serif);
  color: var(--ink-dark);
  font-weight: 600;
  padding-top: 4px;
  font-size: 16px;
}
.org-info dd { margin: 0 0 8px; font-size: 17px; }

.officers {
  margin-top: 20px;
  padding: 24px;
  background: var(--paper-warm);
  border: 1px solid var(--rule);
}
.officers h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--ink-dark);
  margin: 0 0 12px;
}
.officers dl {
  margin: 0;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 8px 16px;
  font-size: 17px;
}
.officers dt { font-family: var(--font-serif); color: var(--ink-dark); font-weight: 600; }
.officers dd { margin: 0; }

/* ========== 最終CTA ========== */
.final-cta {
  background: var(--ink);
  color: #fff;
  padding: 56px 20px;
  text-align: center;
  margin-top: 40px;
}
.final-cta__inner { max-width: var(--content-max); margin: 0 auto; }
.final-cta h2 {
  font-family: var(--font-serif);
  font-size: 30px;
  color: #fff;
  border: none;
  padding: 0;
  margin: 0 0 20px;
  line-height: 1.5;
}
@media (min-width: 768px) { .final-cta h2 { font-size: 36px; } }
.final-cta p {
  font-size: 18px;
  line-height: 1.9;
  color: #fff;
  opacity: 0.95;
  margin-bottom: 24px;
}
.final-cta .btn-primary {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
  min-width: 300px;
}
.final-cta .btn-primary:hover,
.final-cta .btn-primary:focus-visible {
  background: #fff;
  color: var(--ink-dark);
  border-color: #fff;
}
.final-cta .btn-note { color: #fff; opacity: 0.9; }

/* ========== フッター ========== */
.site-footer {
  background: var(--paper-warm);
  padding: 48px 20px 32px;
  border-top: 1px solid var(--rule);
}
.site-footer__inner {
  max-width: var(--wide-max);
  margin: 0 auto;
  text-align: center;
}
.site-footer__logo { margin: 0 auto 16px; max-width: 320px; }
.site-footer__org {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--sumi);
  margin: 0 0 4px;
}
.site-footer__addr { font-size: 16px; color: var(--sumi-sub); margin: 0 0 24px; }
.site-footer__links {
  list-style: none;
  padding: 0;
  margin: 24px 0 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
}
.site-footer__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  color: var(--ink);
  font-size: 16px;
}
.site-footer__copyright {
  font-size: 14px;
  color: var(--sumi-sub);
  margin: 16px 0 0;
}

/* ========== 固定CTAバー ========== */
.sticky-cta {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 40;
  background: rgba(139, 26, 26, 0.97);
  backdrop-filter: blur(6px);
  padding: 12px 16px;
  border-top: 2px solid var(--ink-dark);
  box-shadow: 0 -4px 16px rgba(0,0,0,0.12);
}
.sticky-cta__inner {
  max-width: var(--wide-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.sticky-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  width: 100%;
  max-width: 480px;
  padding: 8px 20px;
  background: #fff;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 4px;
  border: 2px solid #fff;
  line-height: 1.3;
  text-align: center;
}
.sticky-cta a:hover, .sticky-cta a:focus-visible {
  background: var(--paper);
  color: var(--ink-dark);
}

/* ========== 文字大きくボタン ========== */
.textsize-toggle {
  position: fixed;
  bottom: 96px;
  right: 12px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 48px;
  padding: 8px 14px;
  background: var(--paper);
  color: var(--ink-dark);
  border: 2px solid var(--ink);
  border-radius: 999px;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--shadow-card);
}
.textsize-toggle[aria-pressed="true"] { background: var(--ink); color: #fff; }
.textsize-toggle .big { font-size: 20px; line-height: 1; }

/* ========== ライトボックス ========== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0,0,0,0.85);
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
  overflow: auto;
}
.lightbox.is-open { display: flex; }
.lightbox__img {
  max-width: 100%;
  max-height: 92vh;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}
.lightbox__inner {
  position: relative;
  max-width: 100%;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: pinch-zoom;
}
.lightbox__close {
  position: fixed;
  top: 16px; right: 16px;
  width: 48px; height: 48px;
  background: #fff;
  color: var(--sumi);
  border: none;
  border-radius: 50%;
  font-size: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.lightbox__hint {
  position: fixed;
  bottom: 16px; left: 50%;
  transform: translateX(-50%);
  background: rgba(255,255,255,0.95);
  color: var(--sumi);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
}

/* ========== 仮画像プレースホルダ ========== */
.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  background: repeating-linear-gradient(
    45deg,
    var(--paper-warm),
    var(--paper-warm) 12px,
    #EFE3C6 12px,
    #EFE3C6 24px
  );
  color: var(--sumi-sub);
  font-size: 14px;
  padding: 24px;
  text-align: center;
  border: 1px solid var(--rule);
  min-height: 180px;
}
.placeholder__label {
  font-family: var(--font-serif);
  color: var(--ink-dark);
  font-size: 16px;
}
.placeholder__note {
  font-size: 13px;
  color: var(--sumi-sub);
}

/* ========== 下層ページ用 ========== */
.subpage {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 40px 20px 80px;
}
.subpage h1 {
  font-family: var(--font-serif);
  font-size: 28px;
  color: var(--sumi);
  border-bottom: 2px solid var(--ink);
  padding-bottom: 16px;
  margin: 0 0 24px;
}
.breadcrumb {
  font-size: 15px;
  color: var(--sumi-sub);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--ink); }
.subpage-notice {
  padding: 32px 24px;
  background: var(--paper-warm);
  border-left: 4px solid var(--ink);
  font-size: 18px;
  margin: 24px 0;
}

/* prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}