/* =============================================
   記憶のアトリエ — グローバルスタイル
   ============================================= */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;1,300&family=Noto+Sans+JP:wght@300;400&family=Noto+Serif+JP:wght@300;400&display=swap');

/* ── カラー変数（ライトモード） ── */
:root {
  --bg:           #FAFAF8;
  --bg-card:      #FFFFFF;
  --bg-overlay:   rgba(26, 39, 68, 0.85);
  --text:         #1A1A1A;
  --text-muted:   #888880;
  --text-light:   #AAAAAA;
  --navy:         #1A2744;
  --blue:         #8AAFC8;
  --gold:         #C9A96E;
  --border:       #E8E4DC;
  --shadow:       rgba(26, 39, 68, 0.08);
  --shadow-hover: rgba(26, 39, 68, 0.18);
  --placeholder:  #F0EDE8;
}

/* ── ダークモード変数 ── */
[data-theme="dark"] {
  --bg:           #0F1117;
  --bg-card:      #1A1D26;
  --bg-overlay:   rgba(0, 0, 0, 0.9);
  --text:         #E8E4DC;
  --text-muted:   #9090A0;
  --text-light:   #666680;
  --navy:         #8AAFC8;
  --blue:         #6A9AB8;
  --gold:         #C9A96E;
  --border:       #2A2D38;
  --shadow:       rgba(0, 0, 0, 0.3);
  --shadow-hover: rgba(0, 0, 0, 0.5);
  --placeholder:  #1E2130;
}

/* ── リセット・ベース ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 300;
  font-size: 15px;
  line-height: 1.8;
  transition: background 0.4s, color 0.4s;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; font-family: inherit; }

/* ── Canvas（パーティクル背景） ── */
#particle-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

/* ── ヘッダー ── */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s, border-color 0.4s;
}

[data-theme="dark"] #site-header {
  background: rgba(15, 17, 23, 0.88);
}

.site-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.3rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  color: var(--navy);
  cursor: pointer;
  transition: opacity 0.3s;
}
.site-logo:hover { opacity: 0.7; }
.site-logo span {
  display: block;
  font-size: 0.6rem;
  letter-spacing: 0.35em;
  color: var(--text-muted);
  font-family: 'Noto Sans JP', sans-serif;
  margin-top: 2px;
}

/* ── ダークモードトグル ── */
#theme-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.3s, color 0.3s, transform 0.3s;
}
#theme-toggle:hover {
  border-color: var(--gold);
  color: var(--gold);
  transform: rotate(20deg);
}

/* ── メインコンテンツ領域 ── */
#app {
  position: relative;
  z-index: 1;
  padding-top: 80px;
  min-height: 100vh;
}

/* ── フェードアニメーション ── */
.fade-enter {
  opacity: 0;
  transform: translateY(16px);
}
.fade-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

/* =============================================
   TOP / ヒーローセクション
   ============================================= */
#view-top {
  min-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px;
}

.hero-label {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.75rem;
  letter-spacing: 0.55em;
  color: var(--gold);
  margin-bottom: 24px;
  opacity: 0.8;
}

.hero-title-ja {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--navy);
  line-height: 1.2;
  margin-bottom: 8px;
}

[data-theme="dark"] .hero-title-ja { color: var(--text); }

.hero-title-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  font-weight: 300;
  letter-spacing: 0.5em;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.hero-copy {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: var(--text-muted);
  letter-spacing: 0.15em;
  line-height: 2;
  margin-bottom: 56px;
}

.hero-divider {
  width: 48px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 0 auto 48px;
}

.btn-enter {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 40px;
  border: 1px solid var(--navy);
  color: var(--navy);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  border-radius: 1px;
  transition: background 0.3s, color 0.3s, transform 0.3s;
}
.btn-enter:hover {
  background: var(--navy);
  color: var(--bg);
  transform: translateY(-2px);
}
[data-theme="dark"] .btn-enter {
  border-color: var(--text-muted);
  color: var(--text);
}
[data-theme="dark"] .btn-enter:hover {
  background: var(--text);
  color: var(--bg);
}

/* =============================================
   ギャラリー（作品一覧）
   ============================================= */
#view-gallery {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 24px 100px;
}

.page-heading {
  text-align: center;
  margin-bottom: 64px;
}
.page-heading-label {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.72rem;
  letter-spacing: 0.5em;
  color: var(--gold);
  margin-bottom: 16px;
}
.page-heading-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 300;
  color: var(--navy);
  letter-spacing: 0.12em;
  margin-bottom: 20px;
}
[data-theme="dark"] .page-heading-title { color: var(--text); }

.page-heading-divider {
  width: 48px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 0 auto;
}

/* ── タブフィルター ── */
.gallery-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.tab-btn {
  padding: 8px 28px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  font-family: 'Noto Sans JP', sans-serif;
  transition: all 0.25s;
  cursor: pointer;
  background: transparent;
}
.tab-btn:hover { border-color: var(--gold); color: var(--gold); }
.tab-btn.active {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--bg);
}
[data-theme="dark"] .tab-btn.active {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

/* カードグリッド */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

/* 作品カード */
.artwork-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
  opacity: 0;
  transform: translateY(20px);
}
.artwork-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease, box-shadow 0.3s ease;
}
.artwork-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px var(--shadow-hover);
  border-color: rgba(201, 169, 110, 0.4);
}

/* カードサムネイル */
.card-thumb {
  position: relative;
  width: 100%;
  padding-top: 75%; /* 4:3 比率 */
  overflow: hidden;
  background: var(--placeholder);
}
.card-thumb img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.artwork-card:hover .card-thumb img {
  transform: scale(1.04);
}

/* プレースホルダー */
.card-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--placeholder);
}
.card-placeholder-text {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.78rem;
  color: var(--text-light);
  letter-spacing: 0.3em;
}
.card-placeholder-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.7rem;
  color: var(--text-light);
  letter-spacing: 0.2em;
  opacity: 0.7;
}

/* カード情報 */
.card-info {
  padding: 20px 22px 22px;
}
.card-category {
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 6px;
}
.card-title {
  font-family: 'Noto Serif JP', serif;
  font-size: 1rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.card-date {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
}

/* =============================================
   作品詳細ページ
   ============================================= */
#view-detail {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px 100px;
}

/* 戻るボタン */
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  margin-bottom: 48px;
  transition: color 0.3s, gap 0.3s;
}
.btn-back:hover {
  color: var(--navy);
  gap: 12px;
}
[data-theme="dark"] .btn-back:hover { color: var(--text); }

/* 詳細ヘッダー */
.detail-header {
  margin-bottom: 48px;
}
.detail-category {
  font-size: 0.72rem;
  letter-spacing: 0.35em;
  color: var(--gold);
  margin-bottom: 12px;
}
.detail-title {
  font-family: 'Noto Serif JP', serif;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 300;
  color: var(--navy);
  letter-spacing: 0.08em;
  line-height: 1.5;
  margin-bottom: 10px;
}
[data-theme="dark"] .detail-title { color: var(--text); }

.detail-date {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.2em;
}

/* デジタル作品（メイン画像） */
.detail-digital-wrap {
  position: relative;
  margin-bottom: 64px;
  cursor: zoom-in;
}
.detail-digital-wrap img {
  width: 100%;
  border: 1px solid var(--border);
  transition: opacity 0.3s;
}
.detail-digital-wrap:hover img { opacity: 0.92; }
.detail-zoom-hint {
  position: absolute;
  bottom: 14px; right: 16px;
  font-size: 0.68rem;
  letter-spacing: 0.25em;
  color: rgba(255,255,255,0.75);
  background: rgba(0,0,0,0.35);
  padding: 4px 10px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
}

/* 区切り線 */
.detail-divider {
  width: 100%; height: 1px;
  background: var(--border);
  margin-bottom: 48px;
}

/* 下段：原画 + 解説 */
.detail-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.detail-body.no-original {
  grid-template-columns: 1fr;
}

/* 原画エリア */
.detail-original-section {}
.detail-section-label {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.72rem;
  letter-spacing: 0.4em;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.detail-original-wrap img {
  width: 100%;
  border: 1px solid var(--border);
}

/* 解説エリア */
.detail-description {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.9rem;
  line-height: 2.2;
  color: var(--text);
  letter-spacing: 0.05em;
  margin-bottom: 24px;
}
.detail-memo {
  font-size: 0.8rem;
  line-height: 2;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  border-left: 2px solid var(--border);
  padding-left: 16px;
}

/* =============================================
   モーダル（拡大表示）
   ============================================= */
#modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}
#modal-overlay.open {
  opacity: 1;
  visibility: visible;
}
#modal-overlay img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
}
#modal-close {
  position: fixed;
  top: 20px; right: 24px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, transform 0.2s;
  z-index: 1001;
}
#modal-close:hover {
  background: rgba(255,255,255,0.3);
  transform: rotate(90deg);
}

/* =============================================
   フッター
   ============================================= */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  transition: border-color 0.4s;
}
.footer-logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1rem;
  color: var(--text-muted);
  letter-spacing: 0.2em;
}
.footer-copy {
  font-size: 0.68rem;
  color: var(--text-light);
  letter-spacing: 0.15em;
  margin-top: 8px;
}

/* =============================================
   レスポンシブ
   ============================================= */
@media (max-width: 900px) {
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .detail-body { gap: 40px; }
}

@media (max-width: 640px) {
  #site-header { padding: 16px 20px; }
  .site-logo { font-size: 1.1rem; }
  .gallery-grid { grid-template-columns: 1fr; gap: 20px; }
  #view-gallery { padding: 40px 16px 80px; }
  #view-detail { padding: 32px 16px 80px; }
  .detail-body { grid-template-columns: 1fr; gap: 40px; }
  .detail-body.no-original { grid-template-columns: 1fr; }
  .hero-title-ja { letter-spacing: 0.04em; }
}