/* ─────────────────────────────────────────
   CSS カスタムプロパティ
───────────────────────────────────────── */
:root {
  /* カラー */
  --color-text:         #1a1a1a;
  --color-text-muted:   #6b6258;
  --color-bg:           #f5f0e8;
  --color-surface:      #ede5d8;
  --color-primary:      #5c3d2e;     /* 飛騨の木・古い町並み */
  --color-primary-dark: #3e2619;
  --color-accent:       #2e5c4e;     /* 北アルプスの深緑 */
  --color-dark:         #1a1210;
  --color-white:        #ffffff;
  --color-border:       #d8cfc4;

  /* フォント */
  --font-sans:   "Noto Sans JP", "Hiragino Sans", sans-serif;
  --font-serif:  "Noto Serif JP", "Hiragino Mincho ProN", serif;
  --font-latin:  "Cormorant Garamond", serif;

  /* レイアウト */
  --container-width: 1160px;
  --header-height:   72px;
}

/* ─────────────────────────────────────────
   ベース
───────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 60px);
}

/* ─────────────────────────────────────────
   フェードインアニメーション
───────────────────────────────────────── */
.js-fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.js-fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────────────────────────────────────
   ヘッダー
───────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: background 0.4s ease, box-shadow 0.4s ease;
}

.site-header.is-scrolled {
  background: rgba(245, 240, 232, 0.96);
  box-shadow: 0 1px 0 var(--color-border);
  backdrop-filter: blur(8px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 60px);
}

.site-header__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  gap: 1px;
  color: var(--color-white);
  transition: color 0.4s ease;
}

.site-header.is-scrolled .site-header__logo {
  color: var(--color-primary);
}

.site-header__logo-en {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  font-weight: 300;
}

.site-header__logo-ja {
  font-family: var(--font-latin);
  font-size: 1.05rem;
  letter-spacing: 0.18em;
  font-weight: 400;
}

.site-nav__list {
  display: flex;
  gap: clamp(24px, 3vw, 40px);
}

.site-nav__link {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.85);
  transition: color 0.3s ease;
}

.site-nav__link:hover {
  color: var(--color-white);
}

.site-header.is-scrolled .site-nav__link {
  color: var(--color-text-muted);
}

.site-header.is-scrolled .site-nav__link:hover {
  color: var(--color-primary);
}

/* ハンバーガーボタン（SP） */
.site-header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.site-header__menu-btn span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-white);
  transition: background 0.4s ease, transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

.site-header.is-scrolled .site-header__menu-btn span {
  background: var(--color-primary);
}

.site-header__menu-btn.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.site-header__menu-btn.is-open span:nth-child(2) {
  opacity: 0;
}

.site-header__menu-btn.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ─────────────────────────────────────────
   モバイルメニュー
───────────────────────────────────────── */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.mobile-nav.is-open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: 32px;
  text-align: center;
}

.mobile-nav__link {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 6vw, 2rem);
  color: var(--color-white);
  letter-spacing: 0.12em;
}

/* ─────────────────────────────────────────
   ヒーロー
───────────────────────────────────────── */
.hero {
  position: relative;
  height: 100svh;
  min-height: 560px;
  overflow: hidden;
}

.hero__bg,
.hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(20, 12, 8, 0.45) 0%,
    rgba(20, 12, 8, 0.3) 50%,
    rgba(20, 12, 8, 0.6) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-white);
  padding-top: var(--header-height);
}

.hero__sub {
  font-family: var(--font-latin);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  letter-spacing: 0.25em;
  font-weight: 300;
  margin-bottom: 12px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s ease 0.3s forwards;
}

.hero__title {
  font-family: var(--font-latin);
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 300;
  letter-spacing: 0.2em;
  line-height: 1;
  margin-bottom: 24px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s ease 0.55s forwards;
}

.hero__lead {
  font-family: var(--font-serif);
  font-size: clamp(0.85rem, 2vw, 1rem);
  letter-spacing: 0.2em;
  font-weight: 300;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 1s ease 0.8s forwards;
}

/* スクロールインジケーター */
.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  opacity: 0;
  animation: fadeIn 1s ease 1.4s forwards;
}

.hero__scroll-line {
  display: block;
  width: 1px;
  height: 60px;
  background: rgba(255,255,255,0.5);
  position: relative;
  overflow: hidden;
}

.hero__scroll-line::after {
  content: "";
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-white);
  animation: scrollLine 2s ease-in-out infinite 1.5s;
}

.hero__scroll-text {
  font-family: var(--font-latin);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.7);
}

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  to { opacity: 1; }
}

@keyframes scrollLine {
  0%   { top: -100%; }
  50%  { top: 0; }
  100% { top: 100%; }
}

/* ─────────────────────────────────────────
   イントロ
───────────────────────────────────────── */
.intro {
  padding-block: clamp(80px, 14vw, 160px);
}

.intro__inner {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
  padding-inline: clamp(20px, 5vw, 60px);
}

.intro__en {
  font-family: var(--font-latin);
  font-size: clamp(0.85rem, 2vw, 1rem);
  font-style: italic;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

.intro__title {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3.5vw, 1.9rem);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin-bottom: 32px;
  color: var(--color-primary);
}

.intro__body {
  font-size: clamp(0.875rem, 2vw, 0.95rem);
  color: var(--color-text-muted);
  line-height: 2;
  letter-spacing: 0.05em;
}

/* ─────────────────────────────────────────
   テーマセクション（食・文化・自然）
───────────────────────────────────────── */
.theme {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 80vh;
}

.theme--reverse {
  direction: rtl;
}

.theme--reverse > * {
  direction: ltr;
}

.theme__visual {
  position: relative;
  overflow: hidden;
}

.theme__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.theme__visual:hover .theme__img {
  transform: scale(1.04);
}

.theme__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(48px, 8vw, 100px) clamp(40px, 7vw, 90px);
  background: var(--color-surface);
}

.theme--culture .theme__content {
  background: var(--color-bg);
}

.theme__num {
  font-family: var(--font-latin);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--color-border);
  margin-bottom: 8px;
}

.theme__en {
  font-family: var(--font-latin);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 300;
  letter-spacing: 0.18em;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 12px;
}

.theme__title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
}

.theme__body {
  font-size: clamp(0.85rem, 1.8vw, 0.95rem);
  line-height: 2.1;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  letter-spacing: 0.04em;
}

.theme__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.theme__tag {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  padding: 5px 14px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  border-radius: 100px;
}

/* ─────────────────────────────────────────
   ストーリーグリッド
───────────────────────────────────────── */
.stories {
  padding-block: clamp(80px, 12vw, 140px);
  background: var(--color-bg);
}

.stories__inner {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 60px);
}

.stories__header {
  text-align: center;
  margin-bottom: clamp(48px, 8vw, 80px);
}

.stories__en {
  font-family: var(--font-latin);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.stories__title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.stories__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto;
  gap: clamp(16px, 3vw, 32px);
}

/* 2枚目のカードを縦長（大きめ）に */
.stories__grid .story-card:nth-child(2) {
  grid-row: span 2;
}

.story-card {
  background: var(--color-white);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.story-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(92, 61, 46, 0.12);
}

.story-card__img-wrap {
  overflow: hidden;
  aspect-ratio: 3 / 2;
}

.stories__grid .story-card:nth-child(2) .story-card__img-wrap {
  aspect-ratio: unset;
  height: 55%;
  min-height: 200px;
}

.story-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.story-card:hover .story-card__img {
  transform: scale(1.05);
}

.story-card__body {
  padding: clamp(20px, 3vw, 28px);
}

.story-card__cat {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.story-card__title {
  font-family: var(--font-serif);
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.story-card__text {
  font-size: 0.8rem;
  line-height: 1.9;
  color: var(--color-text-muted);
}

/* ─────────────────────────────────────────
   バナー（フルワイド）
───────────────────────────────────────── */
.banner {
  position: relative;
  height: clamp(340px, 50vw, 580px);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner__bg,
.banner__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner__overlay {
  position: absolute;
  inset: 0;
  background: rgba(20, 12, 8, 0.55);
}

.banner__content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-white);
  padding-inline: 24px;
}

.banner__en {
  font-family: var(--font-latin);
  font-size: clamp(0.8rem, 2vw, 1rem);
  letter-spacing: 0.25em;
  font-style: italic;
  margin-bottom: 20px;
  color: rgba(255,255,255,0.7);
}

.banner__title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 4.5vw, 3rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  line-height: 1.7;
}

/* ─────────────────────────────────────────
   フッター
───────────────────────────────────────── */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding-block: clamp(48px, 8vw, 80px);
}

.site-footer__inner {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 60px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 40px;
}

.site-footer__logo {
  line-height: 1.3;
}

.site-footer__logo-en {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  font-weight: 300;
}

.site-footer__logo-ja {
  font-family: var(--font-latin);
  font-size: 1.1rem;
  letter-spacing: 0.2em;
  color: var(--color-white);
}

.site-footer__nav {
  text-align: center;
}

.site-footer__nav-list {
  display: flex;
  gap: 24px;
  justify-content: center;
}

.site-footer__nav-list a {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  transition: color 0.3s ease;
}

.site-footer__nav-list a:hover {
  color: var(--color-white);
}

.site-footer__copy {
  text-align: right;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
}

/* ─────────────────────────────────────────
   レスポンシブ
───────────────────────────────────────── */
@media (max-width: 767px) {

  /* ヘッダー */
  .site-nav {
    display: none;
  }

  .site-header__menu-btn {
    display: flex;
  }

  /* テーマセクション */
  .theme {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .theme--reverse {
    direction: ltr;
  }

  .theme__visual {
    aspect-ratio: 4 / 3;
  }

  .theme__content {
    padding: 48px 24px;
  }

  /* ストーリーグリッド */
  .stories__grid {
    grid-template-columns: 1fr;
  }

  .stories__grid .story-card:nth-child(2) {
    grid-row: auto;
  }

  .stories__grid .story-card:nth-child(2) .story-card__img-wrap {
    aspect-ratio: 3 / 2;
    height: auto;
  }

  /* フッター */
  .site-footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 24px;
  }

  .site-footer__copy {
    text-align: center;
  }
}

@media (max-width: 600px) {
  .site-footer__nav-list {
    flex-wrap: wrap;
    gap: 16px;
  }
}