/* =========================================================
   オリエントデジタル館 ― style.css
   知の図鑑スタイル（紙の質感 × 金の装飾 × 深紺）
   ========================================================= */

:root{
  --color-paper:      #f6f1e4;
  --color-paper-dark:  #efe6cf;
  --color-ink:        #2a2620;
  --color-navy:       #1c2a44;
  --color-navy-deep:  #10182a;
  --color-gold:       #b8912f;
  --color-gold-light: #d9b458;
  --color-red:        #b3271f;
  --color-line:       #cbbf9f;

  --font-serif: 'Shippori Mincho', 'Noto Serif JP', serif;
  --font-sans:  'Zen Kaku Gothic New', 'Hiragino Kaku Gothic ProN', sans-serif;

  --max-width: 1080px;
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background:
    radial-gradient(ellipse at top, rgba(184,145,47,0.06), transparent 60%),
    var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

.sp-only{ display: none; }
@media (max-width: 640px){
  .sp-only{ display: inline; }
  .pc-only{ display: none; }
}

a{ color: inherit; text-decoration: none; }

/* ---------- 共通：セクション見出し ---------- */
.section-title{
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.2rem);
  color: var(--color-navy);
  text-align: center;
  margin: 0 0 0.6em;
  letter-spacing: 0.06em;
}
.section-num{
  color: var(--color-gold);
  margin-right: 0.35em;
}
.section-sub{
  display: block;
  font-family: var(--font-sans);
  font-size: 0.42em;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: #7c745d;
  margin-top: 0.5em;
}

section{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 1.5rem;
}

/* =========================================================
   ヘッダー
   ========================================================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(28, 42, 68, 0.96);
  backdrop-filter: blur(6px);
  border-bottom: 2px solid var(--color-gold);
}
.header-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.8rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand{
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--color-paper);
}
.brand-mark{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1.5px solid var(--color-gold-light);
  border-radius: 50%;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-gold-light);
}
.brand-text{ display: flex; flex-direction: column; line-height: 1.3; }
.brand-ja{
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.05em;
}
.brand-en{
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--color-gold-light);
}

.site-nav{ position: relative; }
.nav-list{
  display: flex;
  gap: 1.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a{
  color: var(--color-paper);
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s, color 0.25s;
}
.nav-list a:hover,
.nav-list a.active{
  color: var(--color-gold-light);
  border-color: var(--color-gold-light);
}

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span{
  display: block;
  height: 2px;
  background: var(--color-paper);
  border-radius: 2px;
}

@media (max-width: 780px){
  .nav-toggle{ display: flex; }
  .nav-list{
    position: absolute;
    top: calc(100% + 14px);
    right: 0;
    flex-direction: column;
    background: var(--color-navy-deep);
    border: 1px solid var(--color-gold);
    border-radius: 8px;
    padding: 1rem 1.4rem;
    gap: 0.9rem;
    min-width: 180px;
    display: none;
  }
  .nav-list.open{ display: flex; }
}

/* =========================================================
   ヒーロー
   ========================================================= */
.hero{
  max-width: none;
  padding: 6rem 1.5rem 5rem;
  text-align: center;
  background:
    linear-gradient(180deg, rgba(28,42,68,0.04), transparent 70%);
  position: relative;
}
.hero-ornament{
  color: var(--color-gold);
  letter-spacing: 0.3em;
  font-size: 0.85rem;
  opacity: 0.8;
}
.hero-eyebrow{
  margin: 1.6rem 0 0.6rem;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--color-navy);
  text-transform: uppercase;
}
.hero-catch{
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(2.1rem, 1.3rem + 3.6vw, 3.6rem);
  color: var(--color-navy);
  margin: 0.4em 0 0.6em;
  line-height: 1.5;
  letter-spacing: 0.03em;
}
.hero-lead{
  max-width: 640px;
  margin: 0 auto 2.2rem;
  font-size: 1.02rem;
  color: #4a4536;
}
.hero-btn{
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.9em 2.2em;
  background: var(--color-navy);
  color: var(--color-paper);
  border: 1px solid var(--color-gold);
  border-radius: 999px;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  transition: transform 0.25s ease, background 0.25s ease, box-shadow .25s ease;
  margin-bottom: 2.2rem;
}
.hero-btn:hover{
  background: var(--color-gold);
  color: var(--color-navy-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(184,145,47,0.35);
}
.hero-btn .arrow{ transition: transform 0.25s; }
.hero-btn:hover .arrow{ transform: translateX(4px); }

/* =========================================================
   館について（コンセプト）
   ========================================================= */
.concept{
  background: var(--color-paper-dark);
  border-top: 1px double var(--color-line);
  border-bottom: 1px double var(--color-line);
}
.concept-body{
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  color: #3a3527;
  font-size: 1.02rem;
}
.concept-highlight{
  margin-top: 1.6rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-navy);
  position: relative;
  display: inline-block;
}
.concept-highlight::before,
.concept-highlight::after{
  content: "◆";
  color: var(--color-gold);
  font-size: 0.7rem;
  margin: 0 0.6em;
  vertical-align: middle;
}

/* =========================================================
   知の図鑑（カード）
   ========================================================= */
.themes-lead{
  text-align: center;
  color: #6c644c;
  font-size: 0.92rem;
  margin-top: -0.4rem;
  margin-bottom: 2.6rem;
}

.card-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.6rem;
}

.theme-card{
  --accent: var(--color-navy);
  position: relative;
  background: #fffdf6;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  padding: 1.7rem 1.5rem 1.5rem;
  cursor: pointer;
  text-align: left;
  overflow: hidden;
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease,
              box-shadow 0.3s ease, border-color 0.3s ease;
}
.theme-card.in-view{
  opacity: 1;
  transform: translateY(0);
}
.theme-card::before{
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent);
}
.theme-card:hover{
  border-color: var(--accent);
  box-shadow: 0 14px 30px rgba(28,42,68,0.14);
  transform: translateY(-4px);
}
.card-no{
  font-family: var(--font-serif);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-gold);
}
.card-icon{
  font-size: 2rem;
  display: block;
  margin: 0.5rem 0 0.7rem;
}
.card-title{
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-navy);
  margin: 0 0 0.5rem;
}
.card-desc{
  font-size: 0.88rem;
  color: #5b5643;
  margin: 0;
}
.card-more{
  display: inline-block;
  margin-top: 0.9rem;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  border-bottom: 1px solid currentColor;
}

/* =========================================================
   大切にすること
   ========================================================= */
.philosophy{
  background: var(--color-navy);
  border-radius: 0;
  color: var(--color-paper);
  max-width: none;
}
.philosophy .section-title{ color: var(--color-paper); }
.philosophy .section-num{ color: var(--color-gold-light); }

.philo-grid{
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  text-align: center;
}
.philo-item{
  padding: 1.6rem 1.2rem;
  border: 1px solid rgba(217,180,88,0.35);
  border-radius: 10px;
  background: rgba(255,255,255,0.03);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.philo-item.in-view{ opacity: 1; transform: translateY(0); }
.philo-icon{ font-size: 2.1rem; display: block; margin-bottom: 0.7rem; }
.philo-item h3{
  font-family: var(--font-serif);
  color: var(--color-gold-light);
  margin: 0 0 0.6rem;
  font-size: 1.1rem;
}
.philo-item p{
  font-size: 0.88rem;
  color: #e4dfce;
  margin: 0;
}

/* =========================================================
   今日の一項
   ========================================================= */
.today{ text-align: center; }
.today-lead{ color: #6c644c; font-size: 0.92rem; margin-top: -0.4rem; margin-bottom: 2rem; }

.today-card{
  max-width: 520px;
  margin: 0 auto 1.8rem;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 2rem 1.6rem;
  background: #fffdf6;
  border: 1px dashed var(--color-gold);
  border-radius: 10px;
  transition: box-shadow 0.3s ease;
}
.today-card.filled{
  box-shadow: 0 12px 26px rgba(184,145,47,0.18);
}
.today-placeholder{ color: #9a927a; font-size: 0.9rem; margin: 0; }
.today-icon{ font-size: 2.2rem; }
.today-title{
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-navy);
  margin: 0;
}
.today-desc{ font-size: 0.9rem; color: #5b5643; margin: 0; }

.today-btn{
  padding: 0.85em 2em;
  background: var(--color-gold);
  color: var(--color-navy-deep);
  border: none;
  border-radius: 999px;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}
.today-btn:hover{ background: var(--color-gold-light); transform: translateY(-2px); }

/* =========================================================
   フッター
   ========================================================= */
.site-footer{
  background: var(--color-navy-deep);
  color: #cfc9b4;
  padding: 3.2rem 1.5rem 6rem;
  text-align: center;
  margin-top: 3rem;
}
.footer-brand{
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-gold-light);
  margin: 0 0 0.4rem;
  letter-spacing: 0.08em;
}
.footer-copy{ margin: 0 0 0.3rem; font-size: 0.85rem; }
.footer-note{ margin: 0 0 1.2rem; font-size: 0.75rem; color: #8a8368; }
.footer-year{ margin: 0; font-size: 0.72rem; color: #6f6952; }

/* =========================================================
   サンプル表記（右下・やや大きめ・赤文字）
   ========================================================= */
.sample-badge{
  position: fixed;
  right: 14px;
  bottom: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-red);
  letter-spacing: 0.03em;
  pointer-events: none;
  z-index: 500;
  background: rgba(246,241,228,0.7);
  padding: 4px 12px;
  border-radius: 6px;
  text-shadow: 0 1px 2px rgba(255,255,255,0.5);
}

/* =========================================================
   モーダル（カード詳細）
   ========================================================= */
.modal-overlay{
  position: fixed;
  inset: 0;
  background: rgba(16,24,42,0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
  z-index: 300;
}
.modal-overlay.open{ opacity: 1; visibility: visible; }

.modal-box{
  position: relative;
  max-width: 560px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  background: #fffdf6;
  border: 1px solid var(--color-gold);
  border-radius: 10px;
  padding: 2.4rem 2rem 2rem;
  transform: translateY(20px) scale(0.98);
  transition: transform 0.3s ease;
}
.modal-overlay.open .modal-box{ transform: translateY(0) scale(1); }

.modal-close{
  position: absolute;
  top: 0.7rem;
  right: 0.9rem;
  width: 2rem;
  height: 2rem;
  border: none;
  background: transparent;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-navy);
  cursor: pointer;
}
.modal-close:hover{ color: var(--color-red); }

.modal-content .card-no{ display: block; margin-bottom: 0.4rem; }
.modal-content .card-icon{ font-size: 2.6rem; }
.modal-content .card-title{ font-size: 1.5rem; }
.modal-content .card-desc{ font-size: 0.95rem; margin-bottom: 1rem; }
.modal-content .card-detail{
  font-size: 0.92rem;
  color: #4a4536;
  border-top: 1px dashed var(--color-line);
  padding-top: 1rem;
  margin-top: 1rem;
}

/* =========================================================
   No.01「AI・IT」専用：イメージビュー
   ========================================================= */
.image-view-overlay{
  position: fixed;
  inset: 0;
  background: rgba(16,24,42,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
  z-index: 400;
}
.image-view-overlay.open{ opacity: 1; visibility: visible; }

.image-view-box{
  max-width: 900px;
  width: 100%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  transform: translateY(16px);
  transition: transform 0.3s ease;
}
.image-view-overlay.open .image-view-box{ transform: translateY(0); }

.image-view-caption{
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.1em;
  color: var(--color-gold-light);
  margin: 0;
}
.image-view-img{
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border: 1px solid var(--color-gold);
  border-radius: 8px;
  background: #fffdf6;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}
.image-view-back{
  padding: 0.85em 2.4em;
  background: var(--color-gold);
  color: var(--color-navy-deep);
  border: none;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}
.image-view-back:hover{ background: var(--color-gold-light); transform: translateY(-2px); }

/* =========================================================
   No.04「食文化」専用：独立記事ページ（foods.html）
   ========================================================= */
.article-page{
  max-width: none;
  padding: 0;
  min-height: calc(100vh - 90px);
  background:
    radial-gradient(ellipse at top, rgba(184,145,47,0.06), transparent 60%),
    var(--color-paper);
}
.article-inner{
  max-width: 720px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 6rem;
}
.article-eyebrow{
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  margin: 0 0 0.6em;
}
.article-icon{ font-size: 2.6rem; display: block; margin-bottom: 0.5rem; }
.article-title{
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.8rem, 1.3rem + 2vw, 2.6rem);
  color: var(--color-navy);
  margin: 0 0 0.5em;
  letter-spacing: 0.04em;
}
.article-lead{
  font-size: 1.05rem;
  color: #5b5643;
  margin: 0 0 2.4rem;
  padding-bottom: 2rem;
  border-bottom: 1px double var(--color-line);
}
.article-body h2{
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-navy);
  margin: 2.2rem 0 0.8rem;
}
.article-body h2::before{
  content: "◆ ";
  color: var(--color-gold);
}
.article-body p{
  font-size: 0.98rem;
  color: #3a3527;
  margin: 0 0 1.2rem;
}
.article-back{
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin-top: 2.4rem;
  padding: 0.85em 2.2em;
  background: var(--color-navy);
  color: var(--color-paper);
  border: 1px solid var(--color-gold);
  border-radius: 999px;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: transform 0.25s ease, background 0.25s ease, box-shadow .25s ease;
}
.article-back:hover{
  background: var(--color-gold);
  color: var(--color-navy-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(184,145,47,0.35);
}

/* =========================================================
   No.04「食文化」専用：cafe●△● 紹介ページ（cafe.html）
   ========================================================= */
.cafe-gallery{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.9rem;
  margin: 2rem 0 2.6rem;
}
.cafe-gallery img{
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--color-line);
  box-shadow: 0 8px 18px rgba(28,42,68,0.12);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.cafe-gallery img:hover{
  transform: translateY(-3px);
  box-shadow: 0 14px 28px rgba(28,42,68,0.2);
}
.cafe-gallery figure{ margin: 0; }
.cafe-gallery figcaption{
  margin-top: 0.4rem;
  font-size: 0.72rem;
  color: #8a8368;
  text-align: center;
  letter-spacing: 0.03em;
}

.cafe-info{
  margin: 0 0 1.4rem;
  padding: 1.5rem 1.6rem;
  background: var(--color-paper-dark);
  border: 1px solid var(--color-line);
  border-radius: 8px;
}
.cafe-info dl{
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
  margin: 0;
}
.cafe-info dt{
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--color-gold);
  letter-spacing: 0.05em;
}
.cafe-info dd{
  margin: 0;
  font-size: 0.92rem;
  color: #3a3527;
}
.cafe-map-link{
  display: inline-block;
  margin-top: 0.2rem;
  font-size: 0.78rem;
  color: #8a8368;
  border-bottom: 1px dotted #8a8368;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.cafe-map-link:hover{
  color: var(--color-navy);
  border-color: var(--color-navy);
}

/* =========================================================
   スクロールフェード共通
   ========================================================= */
.fade-in{
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.in-view{
  opacity: 1;
  transform: translateY(0);
}