/* =========================================================================
   波々伯部神社 公式サイト — スタイルシート
   構成: 変数(配色・書体) → 基本設定 → 共通部品 → 各セクション → レスポンシブ
   ========================================================================= */

:root {
  --paper: #f4f1e9;
  --mist: #eae4d6;
  --ink: #262a22;
  --ink-soft: #565b4d;
  --forest: #3c4a38;
  --forest-deep: #2b3629;
  --patina: #6e8478;
  --wood: #96794f;
  --line: rgba(38, 42, 34, 0.15);
  --line-strong: rgba(38, 42, 34, 0.3);

  --font-display: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  --font-body: "Noto Serif JP", "Hiragino Mincho ProN", serif;

  --measure: 34em;
  --gap-section: clamp(4rem, 9vw, 8rem);
  --pad-inline: clamp(1.25rem, 5vw, 4rem);

  --dur-slow: 900ms;
  --dur: 700ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1c1e18;
    --mist: #242720;
    --ink: #ece7d9;
    --ink-soft: #b7b2a0;
    --forest: #93b49a;
    --forest-deep: #6e8f78;
    --patina: #9fbba5;
    --wood: #cba876;
    --line: rgba(236, 231, 217, 0.16);
    --line-strong: rgba(236, 231, 217, 0.3);
  }
}

/* ---------- 基本設定 ---------- */
* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--patina); outline-offset: 3px; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; }

.wrap {
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--pad-inline);
}

.measure { max-width: var(--measure); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- 写真 (picture / responsive object-position) ---------- */
.photo {
  position: relative;
  overflow: hidden;
  background: var(--mist);
}
.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: var(--op-mobile, 50% 50%);
}
@media (min-width: 760px) {
  .photo img { object-position: var(--op-desktop, 50% 50%); }
}
.photo-caption {
  position: absolute;
  left: 1rem;
  bottom: 0.9rem;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: #f4f1e9;
  background: rgba(38, 42, 34, 0.42);
  padding: 0.3rem 0.7rem;
}

/* 読み込み前後のフェード（控えめ） */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- ヘッダー / ナビゲーション ---------- */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 5vw, 3rem);
  background: transparent;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
}
.site-header.is-solid {
  background: rgba(244, 241, 233, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
  box-shadow: 0 1px 0 var(--line);
}
@media (prefers-color-scheme: dark) {
  .site-header.is-solid { background: rgba(28, 30, 24, 0.86); }
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  text-decoration: none;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}
.site-header.is-solid .brand,
.site-header.nav-open .brand { color: var(--ink); }
.brand-ja { font-family: var(--font-display); font-size: 1.15rem; letter-spacing: 0.04em; }
.brand-en { font-size: 0.66rem; letter-spacing: 0.12em; opacity: 0.8; margin-top: 0.15rem; }

.nav-toggle {
  display: none;
  width: 2.6rem; height: 2.6rem;
  border: none;
  background: none;
  cursor: pointer;
  position: relative;
  z-index: 60;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: "";
  position: absolute;
  left: 0.6rem; right: 0.6rem;
  height: 1px;
  background: var(--paper);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-header.is-solid .nav-toggle span,
.site-header.is-solid .nav-toggle::before,
.site-header.is-solid .nav-toggle::after,
.site-header.nav-open .nav-toggle span,
.site-header.nav-open .nav-toggle::before,
.site-header.nav-open .nav-toggle::after { background: var(--ink); }
.nav-toggle::before { top: 1rem; }
.nav-toggle span { top: 1.3rem; }
.nav-toggle::after { top: 1.6rem; }
.site-header.nav-open .nav-toggle::before { transform: translateY(0.3rem) rotate(45deg); }
.site-header.nav-open .nav-toggle span { opacity: 0; }
.site-header.nav-open .nav-toggle::after { transform: translateY(-0.3rem) rotate(-45deg); }

.site-nav ul {
  display: flex;
  gap: clamp(1rem, 2.2vw, 2.2rem);
  list-style: none;
  margin: 0; padding: 0;
}
.site-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--paper);
  padding-bottom: 0.2rem;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header.is-solid .site-nav a { color: var(--ink); }
.site-nav a:hover { border-color: currentColor; }

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: fixed;
    inset: 0;
    background: var(--paper);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur) var(--ease);
  }
  .site-header.nav-open .site-nav { opacity: 1; pointer-events: auto; }
  .site-nav ul { flex-direction: column; align-items: center; gap: 1.6rem; }
  .site-nav a { color: var(--ink); font-family: var(--font-display); font-size: 1.3rem; }
}

/* ---------- ヒーロー ---------- */
.hero {
  position: relative;
  height: 100svh;
  /* 画面がとても横長（幅の広いウィンドウ・ワイドモニター）になっても、
     縦方向が極端に狭くならないよう高さの下限を設けています。
     これにより、写真の主役（鳥居や社殿）が上下で見切れるのを防ぎます。 */
  min-height: max(560px, calc(100vw / 1.85));
  display: flex;
  align-items: flex-end;
  color: #f4f1e9;
}
.hero-slides {
  position: absolute; inset: 0;
  animation: hero-in 14s var(--ease) both;
}
@keyframes hero-in {
  from { transform: scale(1.06); }
  to { transform: scale(1); }
}
/* 背景の自動切り替え：写真は content/photos.js の SITE.hero.slides の順に並び、
   ゆっくりフェードしながら入れ替わります（6枚前後を想定した秒数です） */
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0;
  animation: hero-fade var(--hero-cycle, 30s) ease-in-out infinite;
}
.hero-slide img { width: 100%; height: 100%; object-fit: cover; object-position: var(--op-mobile, 50% 50%); }
@media (min-width: 760px) {
  .hero-slide img { object-position: var(--op-desktop, 50% 50%); }
}
@keyframes hero-fade {
  0%   { opacity: 0; }
  4%   { opacity: 1; }
  14%  { opacity: 1; }
  18%  { opacity: 0; }
  100% { opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-slides { animation: none; }
  .hero-slide { animation: none; opacity: 0; }
  .hero-slide:first-child { opacity: 1; }
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(20, 22, 17, 0.6) 0%, rgba(20, 22, 17, 0.08) 46%, rgba(20, 22, 17, 0.02) 62%);
}
.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 0 var(--pad-inline) clamp(3rem, 9vh, 6rem);
  text-align: center;
}
.hero-ja {
  color: inherit;
  font-size: clamp(2.4rem, 8vw, 4.2rem);
  letter-spacing: 0.05em;
  animation: fade-up 1.1s var(--ease) 0.3s both;
}
.hero-en {
  margin-top: 0.7rem;
  font-size: clamp(0.95rem, 2.4vw, 1.3rem);
  letter-spacing: 0.14em;
  opacity: 0.92;
  animation: fade-up 1.1s var(--ease) 0.5s both;
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .hero .photo img { animation: none; }
  .hero-ja, .hero-en { animation: none; }
}
.scroll-cue {
  position: absolute;
  left: 50%; bottom: 1.4rem;
  transform: translateX(-50%);
  width: 1px; height: 2.6rem;
  background: rgba(244, 241, 233, 0.6);
  z-index: 1;
}
.scroll-cue::after {
  content: "";
  position: absolute; left: -2px; top: 0;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #f4f1e9;
  animation: cue-drop 2.2s var(--ease) infinite;
}
@keyframes cue-drop {
  0% { top: 0; opacity: 0; }
  30% { opacity: 1; }
  100% { top: 90%; opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .scroll-cue::after { animation: none; opacity: 0.6; } }

/* ---------- 導入 (世界観) ---------- */
.welcome {
  padding: clamp(4rem, 10vw, 6.5rem) var(--pad-inline) clamp(3rem, 7vw, 4.5rem);
}
.welcome-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(2rem, 6vw, 4.5rem);
  text-align: center;
}
.welcome-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.4em;
  color: var(--ink-soft);
  padding-block: 0.3rem;
  border-right: 1px solid var(--line);
  padding-right: clamp(1.5rem, 4vw, 3rem);
  flex-shrink: 0;
}
.welcome-text .lead {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.6vw, 1.55rem);
  max-width: 24em;
  margin-inline: auto;
  letter-spacing: 0.03em;
}
.welcome-text .body {
  margin-top: 1.1rem;
  color: var(--ink-soft);
  max-width: 28em;
  margin-inline: auto;
}
@media (max-width: 700px) {
  .welcome-vertical { display: none; }
}

.photo-strip {
  display: grid;
  grid-template-columns: 1fr;
  row-gap: clamp(1.25rem, 3vw, 2.5rem);
  background: var(--paper);
  max-width: 860px;
  margin-inline: auto;
  padding-inline: var(--pad-inline);
}
.photo-strip .photo { aspect-ratio: 4 / 3; }

/* ---------- セクション共通 ---------- */
.section { padding-block: var(--gap-section); }
.section-alt { background: var(--mist); }
.section-head {
  margin-inline: auto;
  margin-bottom: clamp(2.6rem, 6vw, 4rem);
  max-width: 34em;
  text-align: center;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.1rem);
  letter-spacing: 0.06em;
}
.section-head .en {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--ink-soft);
}
.section-head .lead {
  margin-top: 1.3rem;
  margin-inline: auto;
  color: var(--ink-soft);
  max-width: 30em;
}

/* ---------- 境内について ---------- */
.keidai-item {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  padding-block: clamp(2rem, 5vw, 3rem);
  border-top: 1px solid var(--line);
}
.keidai-item:last-child { border-bottom: 1px solid var(--line); }
.keidai-item:nth-child(even) { direction: rtl; }
.keidai-item:nth-child(even) > * { direction: ltr; }
.keidai-item .photo { aspect-ratio: 4 / 3; }
.keidai-item h3 { font-size: 1.3rem; margin-bottom: 0.8rem; }
.keidai-item p { color: var(--ink-soft); }

@media (max-width: 760px) {
  .keidai-item { grid-template-columns: 1fr; }
  .keidai-item:nth-child(even) { direction: ltr; }
}

.keidai-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: clamp(2rem, 5vw, 3rem);
}
.keidai-gallery .photo { aspect-ratio: 4 / 3; }
@media (max-width: 760px) {
  .keidai-gallery { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 500px) {
  .keidai-gallery { grid-template-columns: 1fr; }
}

/* ---------- ページ内メニュー（ヒーロー直下、序盤から各項目へ移動できる） ---------- */
.quicklinks {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  padding: 1.4rem clamp(1rem, 5vw, 3rem);
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.quicklinks a {
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.85rem;
  color: var(--ink-soft);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  white-space: nowrap;
}
.quicklinks a:hover {
  background: var(--forest);
  border-color: var(--forest);
  color: var(--paper);
}
@media (max-width: 560px) {
  .quicklinks { gap: 0.5rem; padding: 1.1rem 1rem; }
  .quicklinks a { font-size: 0.8rem; padding: 0.5rem 0.9rem; }
}

/* ---------- 神社について / 由緒 ---------- */
.about-body, .matsuri-body { color: var(--ink-soft); }
.about-body p + p, .matsuri-body p + p { margin-top: 1.2rem; }

.history-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.founding {
  position: sticky;
  top: 6rem;
}
.founding .kanji { font-size: 0.95rem; color: var(--ink-soft); margin-bottom: 0.3rem; letter-spacing: 0.08em; }
.founding .num {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 9vw, 5.5rem);
  line-height: 1;
  color: var(--forest);
}
.founding .num .den {
  font-family: var(--font-body);
  font-size: 0.3em;
  color: var(--ink-soft);
  margin-left: 0.35em;
  vertical-align: super;
  letter-spacing: 0;
}
.history-body p { color: var(--ink-soft); }
.history-body p + p { margin-top: 1.3rem; }

@media (max-width: 760px) {
  .history-grid { grid-template-columns: 1fr; }
  .founding { position: static; }
}

/* ---------- 祭礼 ---------- */
.matsuri-photos {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1rem;
  margin-top: clamp(2rem, 5vw, 3rem);
}
.matsuri-photos .photo:first-child { aspect-ratio: 4 / 5; }
.matsuri-photos .photo:last-child { aspect-ratio: 4 / 5; }
@media (max-width: 700px) {
  .matsuri-photos { grid-template-columns: 1fr; }
}

/* ---------- お知らせ ---------- */
.news-list { border-top: 1px solid var(--line); }
.news-item {
  display: grid;
  grid-template-columns: 8em 1fr;
  gap: 1.5rem;
  padding-block: 1.4rem;
  border-bottom: 1px solid var(--line);
}
.news-item time { color: var(--ink-soft); font-size: 0.88rem; font-variant-numeric: tabular-nums; padding-top: 0.2rem; }
.news-item h3 { font-size: 1.05rem; font-family: var(--font-body); font-weight: 700; margin-bottom: 0.4rem; }
.news-item p { color: var(--ink-soft); }
.news-empty { padding-block: 2rem; color: var(--ink-soft); border-bottom: 1px solid var(--line); }
@media (max-width: 560px) {
  .news-item { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---------- 参拝案内 ---------- */
.visit-list { border-top: 1px solid var(--line); }
.visit-row {
  display: grid;
  grid-template-columns: 10em 1fr;
  gap: 1.5rem;
  padding-block: 1.2rem;
  border-bottom: 1px solid var(--line);
}
.visit-row dt { font-weight: 700; }
.visit-row dd { margin: 0; color: var(--ink-soft); }
.visit-note { margin-top: 1.4rem; font-size: 0.85rem; color: var(--ink-soft); }
@media (max-width: 560px) {
  .visit-row { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---------- アクセス ---------- */
.access-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
.access-info dl { margin: 0; }
.access-info .row { padding-block: 0.9rem; border-bottom: 1px solid var(--line); }
.access-info dt { font-size: 0.82rem; color: var(--ink-soft); margin-bottom: 0.25rem; }
.access-info dd { margin: 0; }
.access-map {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  background: var(--mist);
}
.access-map iframe { width: 100%; height: 100%; border: 0; display: block; }
.btn-map {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.7rem 1.4rem;
  border: 1px solid var(--line-strong);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.btn-map:hover { background: var(--forest); color: var(--paper); border-color: var(--forest); }
@media (max-width: 760px) {
  .access-grid { grid-template-columns: 1fr; }
}

/* ---------- フッター ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2.4rem;
  padding-inline: var(--pad-inline);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  color: var(--ink-soft);
  font-size: 0.85rem;
}
.site-footer .brand-ja { font-family: var(--font-display); color: var(--ink); font-size: 1rem; }

/* ---------- モバイル固定の実用リンク ---------- */
.mobile-quicklinks {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  display: none;
  background: rgba(244, 241, 233, 0.96);
  backdrop-filter: blur(6px);
  border-top: 1px solid var(--line);
}
@media (prefers-color-scheme: dark) {
  .mobile-quicklinks { background: rgba(28, 30, 24, 0.94); }
}
.mobile-quicklinks ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  list-style: none;
  margin: 0; padding: 0;
}
.mobile-quicklinks a {
  display: block;
  text-align: center;
  padding: 0.85rem 0.5rem;
  text-decoration: none;
  font-size: 0.85rem;
  color: var(--ink);
  border-right: 1px solid var(--line);
}
.mobile-quicklinks li:last-child a { border-right: none; }
@media (max-width: 760px) {
  .mobile-quicklinks { display: block; }
  body { padding-bottom: 3.4rem; }
}

/* ---------- noscript フォールバック ---------- */
.noscript-panel {
  max-width: 640px;
  margin: 3rem auto;
  padding: 2rem;
  border: 1px solid var(--line-strong);
  font-family: var(--font-body);
}