/*
Theme Name: 揺蕩う黄昏恩愛
Theme URI: https://tayutau-on.com
Author: りぐる
Author URI: https://tayutau-on.com
Description: 揺蕩う黄昏恩愛 公式サイト専用テーマ。黄昏・路地裏・官能をコンセプトにしたフルカスタムデザイン。
Version: 1.0.0
License: Private
Text Domain: tayutau
*/

/* ============================================================
   CSS カスタムプロパティ（カラーパレット・共通値）
   ============================================================ */
:root {
  /* カラー */
  --c-bg:           #16101E;  /* トップ：紫紺の黄昏 */
  --c-bg-works:     #0F0F1A;  /* Families：深夜の路地 */
  --c-bg-about:     #13101A;  /* About：静かな紫 */
  --c-bg-gallery:   #0E1015;  /* Gallery：展示空間 */
  --c-bg-bulletin:  #100F18;  /* Bulletin：夜の広場 */
  --c-bg-opinion:   #121218;  /* Opinion Box：夜明け前 */
  --c-bg-header:    #0D0A18;  /* ヘッダー：最も深い夜 */
  --c-bg-panel:     #1E1830;  /* パネル・カード */
  --c-bg-card:      #1A1630;  /* カード背景 */

  --c-text:         #F0E6D3;  /* メインテキスト：街灯の白 */
  --c-text-sub:     #C4B4A0;  /* サブテキスト */
  --c-text-muted:   #7A6E6A;  /* 補足テキスト */

  --c-accent:       #E8956D;  /* アクセント：橙・黄昏 */
  --c-main:         #C0622F;  /* メイン：茜・夕焼け */
  --c-sub:          #3D2B56;  /* サブ：紫紺 */
  --c-border:       #2E2040;  /* ボーダー */
  --c-border-light: #3a2e50;  /* 明るめボーダー */

  /* タイポグラフィ */
  --font-main: 'Noto Serif JP', 'Georgia', serif;
  --font-en:   'EB Garamond', 'Georgia', serif;

  /* スペーシング */
  --header-h: 64px;
  --max-w:    900px;
  --max-w-wide: 1100px;

  /* トランジション */
  --transition: 0.3s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--c-bg);
  color: var(--c-text);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--c-accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--c-text);
}

/* ============================================================
   固定ヘッダー
   ============================================================ */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(13, 10, 24, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  transition: box-shadow var(--transition);
}

#site-header.scrolled {
  box-shadow: 0 4px 32px rgba(0,0,0,0.6);
}

.header-logo {
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--c-text);
  letter-spacing: 0.12em;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.3;
}
.header-logo span {
  display: block;
  font-size: 0.68rem;
  color: var(--c-accent);
  letter-spacing: 0.3em;
  margin-bottom: 2px;
}
.header-logo:hover {
  color: var(--c-text);
}

/* ナビゲーション */
#site-nav {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

#site-nav li a {
  display: block;
  padding: 0 18px;
  height: var(--header-h);
  line-height: var(--header-h);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--c-text-sub);
  text-transform: uppercase;
  transition: color var(--transition), background var(--transition);
  position: relative;
}

#site-nav li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--c-accent);
  transition: width var(--transition);
}

#site-nav li a:hover,
#site-nav li a.active {
  color: var(--c-text);
}

#site-nav li a:hover::after,
#site-nav li a.active::after {
  width: 60%;
}

/* ハンバーガー（モバイル） */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--c-text);
  transition: var(--transition);
}

/* ============================================================
   メインコンテンツ
   ============================================================ */
#site-main {
  padding-top: var(--header-h);
  min-height: 100vh;
}

/* ============================================================
   共通レイアウト
   ============================================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}
.container--wide {
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 32px;
}

/* セクション共通 */
.section {
  padding: 96px 0;
}
.section--sm {
  padding: 64px 0;
}

/* セクション見出し */
.section-label {
  font-size: 0.68rem;
  letter-spacing: 0.5em;
  color: var(--c-accent);
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
  text-align: center;
}
.section-title {
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--c-text);
  text-align: center;
  margin-bottom: 8px;
}
.section-divider {
  width: 40px;
  height: 1px;
  background: var(--c-main);
  margin: 20px auto 48px;
}

/* ============================================================
   フッター
   ============================================================ */
#site-footer {
  background: var(--c-bg-header);
  border-top: 1px solid var(--c-border);
  padding: 48px 32px 32px;
  text-align: center;
}

.footer-logo {
  font-family: var(--font-main);
  font-size: 0.88rem;
  color: var(--c-text-sub);
  letter-spacing: 0.18em;
  margin-bottom: 20px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  list-style: none;
  margin-bottom: 28px;
}
.footer-nav a {
  padding: 4px 14px;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--c-text-muted);
  text-transform: uppercase;
  border-right: 1px solid var(--c-border);
}
.footer-nav li:last-child a {
  border-right: none;
}
.footer-nav a:hover {
  color: var(--c-accent);
}

.footer-copy {
  font-size: 0.68rem;
  color: var(--c-text-muted);
  letter-spacing: 0.15em;
}

/* ============================================================
   TOPページ
   ============================================================ */
body.page-template-front-page,
body.home {
  background-color: var(--c-bg);
}

/* ヒーローセクション */
.hero {
  position: relative;
  min-height: 100vh;     /* フォールバック */
  min-height: 100svh;    /* モバイルブラウザUI考慮 */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--header-h) + 40px) 32px 80px;
  overflow: hidden;
}

/* グレインテクスチャ演出 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  pointer-events: none;
  opacity: 0.6;
}

/* 光の筋演出 */
.hero::after {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 60%;
  background: linear-gradient(to bottom, transparent, rgba(232, 149, 109, 0.15), transparent);
  pointer-events: none;
}

.hero-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.55em;
  color: var(--c-accent);
  margin-bottom: 28px;
  position: relative;
}

.hero-title {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--c-text);
  line-height: 1.4;
  margin-bottom: 24px;
  position: relative;
}

.hero-subtitle {
  font-size: 0.82rem;
  letter-spacing: 0.3em;
  color: var(--c-accent);
  margin-bottom: 40px;
  position: relative;
}

.hero-desc {
  font-size: 0.9rem;
  line-height: 2.2;
  color: var(--c-text-sub);
  max-width: 480px;
  margin: 0 auto 56px;
  position: relative;
}

.hero-cta {
  display: inline-block;
  padding: 14px 40px;
  border: 1px solid var(--c-main);
  color: var(--c-text);
  font-size: 0.78rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  transition: background var(--transition), color var(--transition);
  position: relative;
}
.hero-cta:hover {
  background: var(--c-main);
  color: var(--c-text);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.62rem;
  letter-spacing: 0.4em;
  color: var(--c-text-muted);
}
.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--c-text-muted), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 0.8; transform: scaleY(1.2); }
}

/* お知らせセクション */
.news-section {
  background: rgba(30, 24, 48, 0.5);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.news-list {
  list-style: none;
  max-width: 680px;
  margin: 0 auto;
}
.news-item {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
  font-size: 0.86rem;
}
.news-item:last-child {
  border-bottom: none;
}
.news-date {
  font-size: 0.68rem;
  color: var(--c-text-muted);
  letter-spacing: 0.1em;
  white-space: nowrap;
  min-width: 80px;
}
.news-tag {
  font-size: 0.62rem;
  padding: 2px 8px;
  border: 1px solid var(--c-sub);
  color: var(--c-accent);
  letter-spacing: 0.15em;
  white-space: nowrap;
}
.news-title {
  color: var(--c-text-sub);
  line-height: 1.6;
}
.news-title a {
  color: var(--c-text-sub);
}
.news-title a:hover {
  color: var(--c-accent);
}

/* 最新作セクション */
.latest-work {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  max-width: 800px;
  margin: 0 auto;
}

.latest-work-image {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  border: 1px solid var(--c-border);
}
.latest-work-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85);
  transition: transform 0.6s ease, filter 0.6s ease;
}
.latest-work-image:hover img {
  transform: scale(1.04);
  filter: saturate(1);
}

.latest-work-info {}
.latest-work-series {
  font-size: 0.65rem;
  letter-spacing: 0.45em;
  color: var(--c-accent);
  margin-bottom: 12px;
}
.latest-work-title {
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--c-text);
  margin-bottom: 8px;
  line-height: 1.4;
}
.latest-work-subtitle {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--c-accent);
  margin-bottom: 24px;
}
.latest-work-desc {
  font-size: 0.84rem;
  line-height: 2.1;
  color: var(--c-text-sub);
  margin-bottom: 32px;
}
.latest-work-tags {
  font-size: 0.7rem;
  color: var(--c-text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 32px;
}

.btn-purchase {
  display: inline-block;
  padding: 12px 32px;
  background: var(--c-main);
  color: var(--c-text);
  font-size: 0.76rem;
  letter-spacing: 0.35em;
  transition: background var(--transition), transform var(--transition);
  margin: 4px 4px;
}
.btn-purchase:hover {
  background: var(--c-accent);
  color: var(--c-text);
  transform: translateY(-1px);
}
.btn-purchase.secondary {
  background: transparent;
  border: 1px solid var(--c-main);
}
.btn-purchase.secondary:hover {
  background: var(--c-main);
}

/* SNSセクション */
.sns-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 560px;
  margin: 0 auto;
}
.sns-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 32px 40px;
  border: 1px solid var(--c-border);
  background: rgba(30, 24, 48, 0.4);
  min-width: 160px;
  transition: border-color var(--transition), background var(--transition);
  text-decoration: none;
}
.sns-card:hover {
  border-color: var(--c-accent);
  background: rgba(61, 43, 86, 0.3);
}
.sns-card-name {
  font-size: 0.68rem;
  letter-spacing: 0.35em;
  color: var(--c-accent);
  text-transform: uppercase;
}
.sns-card-handle {
  font-size: 0.8rem;
  color: var(--c-text-sub);
  letter-spacing: 0.1em;
}

/* ============================================================
   Familiesページ
   ============================================================ */
body.page-id-families,
body.page-template-page-families {
  background-color: var(--c-bg-works);
}

.page-families {
  background-color: var(--c-bg-works);
  min-height: 100vh;
}

.page-hero {
  padding: calc(var(--header-h) + 64px) 32px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center top, rgba(61, 43, 86, 0.2) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero-label {
  font-size: 0.65rem;
  letter-spacing: 0.55em;
  color: var(--c-accent);
  text-transform: uppercase;
  display: block;
  margin-bottom: 16px;
}
.page-hero-title {
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--c-text);
  margin-bottom: 12px;
}
.page-hero-desc {
  font-size: 0.82rem;
  color: var(--c-text-sub);
  letter-spacing: 0.1em;
  line-height: 2;
}

/* 作品グリッド */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 32px;
  /* padding は .section に任せる */
}

/* 購入プラットフォームリンク（Familiesページ下部） */
.platform-links {
  background: rgba(13, 10, 24, 0.6);
  border-top: 1px solid var(--c-border);
  padding: 48px 32px;
  text-align: center;
}
.platform-links-label {
  font-size: 0.68rem;
  letter-spacing: 0.5em;
  color: var(--c-text-muted);
  margin-bottom: 20px;
  display: block;
}

.work-card {
  border: 1px solid var(--c-border);
  background: var(--c-bg-card);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  text-decoration: none;
  display: block;
}
.work-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-4px);
}

.work-card-thumb {
  aspect-ratio: 3/4;
  overflow: hidden;
  background: var(--c-bg-header);
}
.work-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8);
  transition: transform 0.6s ease, filter 0.6s ease;
}
.work-card:hover .work-card-thumb img {
  transform: scale(1.06);
  filter: saturate(1);
}

.work-card-body {
  padding: 20px 20px 24px;
}
.work-card-series {
  font-size: 0.62rem;
  letter-spacing: 0.4em;
  color: var(--c-accent);
  margin-bottom: 8px;
}
.work-card-title {
  font-size: 1rem;
  font-weight: 400;
  color: var(--c-text);
  letter-spacing: 0.08em;
  line-height: 1.5;
  margin-bottom: 6px;
}
.work-card-sub {
  font-size: 0.75rem;
  color: var(--c-accent);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}
.work-card-tags {
  font-size: 0.65rem;
  color: var(--c-text-muted);
  letter-spacing: 0.08em;
}

/* ============================================================
   個別作品ページ（template-work.php）
   ============================================================ */
.work-detail {
  background-color: var(--c-bg-works);
  min-height: 100vh;
  padding-top: var(--header-h);
}

.work-header {
  padding: 64px 32px 48px;
  text-align: center;
  border-bottom: 1px solid var(--c-border);
  max-width: var(--max-w);
  margin: 0 auto;
}
.work-header-series {
  font-size: 0.65rem;
  letter-spacing: 0.5em;
  color: var(--c-accent);
  display: block;
  margin-bottom: 16px;
}
.work-header-title {
  font-size: 2.2rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--c-text);
  margin-bottom: 10px;
  line-height: 1.3;
}
.work-header-subtitle {
  font-size: 1rem;
  letter-spacing: 0.22em;
  color: var(--c-accent);
}

.work-warning {
  background: rgba(61, 43, 86, 0.5);
  border: 1px solid #5a4273;
  border-radius: 4px;
  padding: 12px 20px;
  margin: 40px auto 0;
  max-width: var(--max-w);
  font-size: 0.8rem;
  color: #bbb;
  text-align: center;
  letter-spacing: 0.08em;
}

.work-body {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 32px;
}

.work-story {
  font-size: 0.94rem;
  line-height: 2.4;
  color: var(--c-text);
  margin-bottom: 40px;
  letter-spacing: 0.04em;
}
.work-story em {
  color: var(--c-accent);
  font-style: normal;
}

.work-tags-wrap {
  font-size: 0.8rem;
  color: var(--c-text-muted);
  border-top: 1px solid var(--c-border);
  padding-top: 20px;
  margin-bottom: 48px;
}

/* 購入セクション */
.purchase-section {
  border-top: 1px solid var(--c-border);
  padding: 48px 0;
  text-align: center;
}
.purchase-label {
  font-size: 0.7rem;
  letter-spacing: 0.5em;
  color: var(--c-accent);
  margin-bottom: 28px;
}
.purchase-buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.purchase-note {
  font-size: 0.68rem;
  color: var(--c-text-muted);
  margin-top: 12px;
}

/* WORKS INFO テーブル */
.work-info-section {
  border-top: 1px solid var(--c-border);
  padding: 40px 0;
}
.work-info-label {
  font-size: 0.7rem;
  letter-spacing: 0.5em;
  color: var(--c-accent);
  text-align: center;
  margin-bottom: 24px;
}
.work-info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}
.work-info-table th,
.work-info-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--c-border);
  text-align: left;
}
.work-info-table th {
  color: var(--c-text-muted);
  font-weight: 400;
  width: 30%;
  letter-spacing: 0.08em;
}
.work-info-table td {
  color: var(--c-text-sub);
}

/* 作品ページ内ナビ */
.work-nav {
  display: flex;
  justify-content: center;
  gap: 32px;
  padding: 32px 0 48px;
  border-top: 1px solid var(--c-border);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
}
.work-nav a {
  color: var(--c-accent);
}
.work-nav a:hover {
  color: var(--c-text);
}

/* ============================================================
   Aboutページ
   ============================================================ */
.page-about {
  background-color: var(--c-bg-about);
  min-height: 100vh;
}

/* ============================================================
   Galleryページ
   ============================================================ */
.page-gallery {
  background-color: var(--c-bg-gallery);
  min-height: 100vh;
}

.gallery-grid {
  columns: 3;
  gap: 16px;
  padding: 64px 0;
}
.gallery-item {
  break-inside: avoid;
  margin-bottom: 16px;
  overflow: hidden;
  border: 1px solid var(--c-border);
  cursor: pointer;
}
.gallery-item img {
  width: 100%;
  display: block;
  filter: saturate(0.85);
  transition: transform 0.5s ease, filter 0.5s ease;
}
.gallery-item:hover img {
  transform: scale(1.03);
  filter: saturate(1);
}

/* Gallery ライトボックス */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(13, 10, 24, 0.95);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9000;
  padding: 40px;
}
.lightbox.open {
  display: flex;
}
.lightbox-img {
  max-height: 90vh;
  max-width: 90vw;
  object-fit: contain;
}
.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  color: var(--c-text-sub);
  font-size: 1.5rem;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
}

/* ============================================================
   Bulletinページ（bbPress用）
   ============================================================ */
.page-bulletin {
  background-color: var(--c-bg-bulletin);
  min-height: 100vh;
}

/* bbPressのスタイル上書き */
.bbp-forum-info,
.bbp-topic-info,
.bbp-reply-info {
  background: var(--c-bg-card) !important;
  border-color: var(--c-border) !important;
  color: var(--c-text-sub) !important;
}
#bbpress-forums {
  color: var(--c-text) !important;
}
#bbpress-forums a {
  color: var(--c-accent) !important;
}
.bbp-button,
input[type="submit"] {
  background: var(--c-main) !important;
  color: var(--c-text) !important;
  border: none !important;
  padding: 10px 24px !important;
  letter-spacing: 0.15em !important;
  cursor: pointer !important;
  transition: background var(--transition) !important;
}
.bbp-button:hover,
input[type="submit"]:hover {
  background: var(--c-accent) !important;
}

/* ============================================================
   Opinion Boxページ
   ============================================================ */
.page-opinion {
  background-color: var(--c-bg-opinion);
  min-height: 100vh;
}

/* Contact Form 7 スタイル上書き */
.wpcf7-form input[type="text"],
.wpcf7-form textarea {
  width: 100%;
  background: rgba(255,255,255,0.04) !important;
  border: 1px solid var(--c-border) !important;
  color: var(--c-text) !important;
  padding: 14px 16px !important;
  font-family: var(--font-main) !important;
  font-size: 0.88rem !important;
  letter-spacing: 0.05em !important;
  outline: none !important;
  transition: border-color var(--transition) !important;
  border-radius: 0 !important;
}
.wpcf7-form input[type="text"]:focus,
.wpcf7-form textarea:focus {
  border-color: var(--c-accent) !important;
}
.wpcf7-form input[type="submit"] {
  background: var(--c-main) !important;
  color: var(--c-text) !important;
  border: none !important;
  padding: 14px 40px !important;
  font-family: var(--font-main) !important;
  font-size: 0.8rem !important;
  letter-spacing: 0.3em !important;
  cursor: pointer !important;
  transition: background var(--transition) !important;
}
.wpcf7-form input[type="submit"]:hover {
  background: var(--c-accent) !important;
}

/* ============================================================
   作品画像プレースホルダー（アイキャッチ未設定時）
   ============================================================ */
.work-thumb-placeholder {
  width: 100%;
  height: 100%;
  min-height: 320px;
  background: linear-gradient(160deg, #1A1230 0%, #0D0A18 50%, #1A1020 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* 装飾的な光の筋 */
.work-thumb-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 40%;
  background: linear-gradient(to bottom, transparent, rgba(232, 149, 109, 0.2), transparent);
}
.work-thumb-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 70%, rgba(61, 43, 86, 0.3) 0%, transparent 60%);
}

.work-thumb-placeholder__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px;
}
.work-thumb-placeholder__no {
  font-size: 0.6rem;
  letter-spacing: 0.5em;
  color: var(--c-accent);
  opacity: 0.7;
}
.work-thumb-placeholder__title {
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.15em;