/* ============================================
   AI研修 - 作例ギャラリー スタイルシート
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --bg-primary: #0a0a14;
  --bg-secondary: #12121f;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --border-glass: rgba(255, 255, 255, 0.08);
  --text-primary: #f0f0f5;
  --text-secondary: #9a9ab0;
  --text-muted: #5a5a72;
  --accent-1: #6366f1;
  --accent-2: #8b5cf6;
  --accent-3: #a78bfa;
  --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);
  --accent-glow: rgba(99, 102, 241, 0.25);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Typography */
  --font-body: 'Noto Sans JP', 'Outfit', system-ui, sans-serif;
  --font-display: 'Outfit', 'Noto Sans JP', system-ui, sans-serif;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 20, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition-smooth);
}

.site-header.scrolled {
  background: rgba(10, 10, 20, 0.92);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  font-size: 1.5rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.8;
    transform: scale(1.1);
  }
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  transition: var(--transition-fast);
  position: relative;
  padding: var(--space-xs) 0;
  white-space: nowrap;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 1px;
  transition: var(--transition-smooth);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::after {
  width: 100%;
}

.youtube-link {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(60px + var(--space-md)) var(--space-xl) var(--space-sm);
  overflow: hidden;
}

.hero.hero-compact {
  min-height: auto;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(99, 102, 241, 0.12), transparent),
    radial-gradient(ellipse 60% 50% at 30% 60%, rgba(139, 92, 246, 0.08), transparent),
    radial-gradient(ellipse 50% 40% at 70% 30%, rgba(167, 139, 250, 0.06), transparent);
  animation: heroBgShift 12s ease-in-out infinite alternate;
}

@keyframes heroBgShift {
  0% {
    opacity: 0.8;
    transform: scale(1);
  }

  100% {
    opacity: 1;
    transform: scale(1.05);
  }
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-3);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% {
    opacity: 0;
    transform: translateY(100vh) scale(0);
  }

  10% {
    opacity: 0.7;
  }

  90% {
    opacity: 0.3;
  }

  100% {
    opacity: 0;
    transform: translateY(-10vh) scale(1);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  text-align: left;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-xs);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-3) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title-sub {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(0.75rem, 1.5vw, 0.95rem);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-2);
  -webkit-text-fill-color: var(--accent-2);
  margin-bottom: var(--space-sm);
  opacity: 0.8;
}

.hero-description {
  font-size: clamp(0.85rem, 1.3vw, 0.95rem);
  color: var(--text-secondary);
  line-height: 1.6;
  font-weight: 300;
}

.hero-wrapper {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-2xl);
  max-width: 1400px;
  width: 100%;
}

.hero-qr {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  padding: var(--space-sm) var(--space-md) var(--space-sm) var(--space-sm);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  max-height: 120px;
  transition: var(--transition-smooth);
}

.hero-qr:hover {
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.qr-img {
  height: 100%;
  max-height: 100px;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 4px;
}

.qr-text {
  font-size: 0.85rem;
  color: var(--text-primary);
  text-align: left;
  line-height: 1.6;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .hero-wrapper {
    flex-direction: column;
    gap: var(--space-lg);
  }
  .hero-content {
    text-align: center;
  }
  .hero-qr {
    margin: 0 auto;
    max-width: 90%;
  }
  .qr-img {
    height: 80px;
    max-height: 80px;
  }
  .qr-text {
    white-space: normal;
    font-size: 0.8rem;
  }
}

/* ---------- Training Section ---------- */
.training-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-xl) 0;
}

.training-inner {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.training-header {
  margin-bottom: var(--space-lg);
}

.training-section-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.training-section-icon {
  font-size: 1.2rem;
}

.training-section-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 300;
}

.training-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.training-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
  overflow: hidden;
}

.training-card:hover {
  transform: translateY(-3px);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.3),
    0 0 24px var(--accent-glow);
}

.training-card:hover .training-card-arrow {
  opacity: 1;
  transform: translateX(0);
}

.training-card-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.1);
  border-radius: var(--radius-sm);
}

.training-card-body {
  flex: 1;
  min-width: 0;
}

.training-card-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
  line-height: 1.4;
}

.training-card-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.training-card-arrow {
  font-size: 1.1rem;
  color: var(--accent-3);
  flex-shrink: 0;
  opacity: 0;
  transform: translateX(-8px);
  transition: var(--transition-fast);
}

.training-card-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  font-size: 0.65rem;
  font-weight: 500;
  color: #f59e0b;
  background: rgba(245, 158, 11, 0.1);
  padding: 2px 8px;
  border-radius: 100px;
  border: 1px solid rgba(245, 158, 11, 0.2);
  letter-spacing: 0.02em;
}

/* ---------- 上級編カード ---------- */
.training-card-advanced {
  border-color: rgba(139, 92, 246, 0.3);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.07), rgba(236, 72, 153, 0.05));
  position: relative;
}

.training-card-advanced::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  padding: 1px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.5), rgba(168, 85, 247, 0.5), rgba(236, 72, 153, 0.4));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.6;
  transition: opacity 0.4s ease;
}

.training-card-advanced:hover::before {
  opacity: 1;
}

.training-card-advanced:hover {
  border-color: rgba(139, 92, 246, 0.5);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.3),
    0 0 30px rgba(139, 92, 246, 0.2),
    0 0 60px rgba(99, 102, 241, 0.08);
}

.training-card-advanced .training-card-badge {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(236, 72, 153, 0.12));
  border-color: rgba(139, 92, 246, 0.35);
  color: #a78bfa;
  font-weight: 600;
}

.training-card-advanced .training-card-icon {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(168, 85, 247, 0.15));
}

/* ---------- Gallery Section Title ---------- */
.gallery-section-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.gallery-section-icon {
  font-size: 1.2rem;
}

.filter-header {
  max-width: 1400px;
  margin: 0 auto;
  margin-bottom: var(--space-sm);
}

/* ---------- Filter Section ---------- */
.filter-section {
  position: sticky;
  top: 60px;
  z-index: 50;
  background: rgba(10, 10, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  padding: var(--space-lg) var(--space-xl) var(--space-md);
}

.filter-bar {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-secondary);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  padding: var(--space-xs) var(--space-md);
  border-radius: 100px;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.filter-btn:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.filter-btn.active {
  color: #fff;
  background: var(--accent-gradient);
  border-color: transparent;
  box-shadow: 0 2px 16px var(--accent-glow);
}

/* ---------- Gallery Section ---------- */
.gallery-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl) var(--space-3xl);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  align-items: start;
}

/* ---------- Gallery Card ---------- */
.gallery-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition-smooth);
  opacity: 0;
  transform: translateY(30px);
  display: flex;
  flex-direction: column;
}

.gallery-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.gallery-card:hover {
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 0 40px var(--accent-glow);
}

.card-image-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--bg-secondary);
}

.card-image {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-card:hover .card-image {
  transform: scale(1.08);
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
      rgba(10, 10, 20, 0.95) 0%,
      rgba(10, 10, 20, 0.3) 50%,
      transparent 100%);
  opacity: 0;
  transition: var(--transition-smooth);
  display: flex;
  align-items: flex-end;
  padding: var(--space-lg);
}

.gallery-card:hover .card-overlay {
  opacity: 1;
}

.card-overlay-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
  max-height: 4.5em;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-body {
  padding: var(--space-md) var(--space-lg);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  line-height: 1.4;
}

.card-model {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
  font-weight: 400;
}

/* Card Categories */
.card-categories {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.card-category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent-3);
  background: rgba(167, 139, 250, 0.1);
  padding: 2px 10px;
  border-radius: 100px;
  letter-spacing: 0.04em;
}

.card-description {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.5;
}

/* ---------- Gallery Empty State ---------- */
.gallery-empty {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-text {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.empty-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(5, 5, 12, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-close {
  position: absolute;
  top: var(--space-xl);
  right: var(--space-xl);
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 2rem;
  cursor: pointer;
  transition: var(--transition-fast);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.lightbox-close:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  transform: scale(0.95);
  transition: var(--transition-spring);
  overflow-y: auto;
}

.lightbox.active .lightbox-content {
  transform: scale(1);
}

.lightbox-img {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.6);
  cursor: zoom-in;
}

.lightbox-info {
  text-align: center;
  max-width: 600px;
}

.lightbox-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.lightbox-meta {
  margin-bottom: var(--space-sm);
}

.lightbox-model {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-3);
  background: rgba(167, 139, 250, 0.1);
  padding: 2px 12px;
  border-radius: 100px;
  letter-spacing: 0.02em;
}

.lightbox-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

/* Lightbox Categories */
.lightbox-categories {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.lightbox-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-3);
  background: rgba(167, 139, 250, 0.1);
  padding: 4px 14px;
  border-radius: 100px;
}

.prompt-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--accent-3);
  background: rgba(167, 139, 250, 0.05);
  /* 少し背景色 */
  border: 1px solid rgba(167, 139, 250, 0.3);
  padding: 8px 18px;
  border-radius: 100px;
  cursor: pointer;
  transition: var(--transition-fast);
  margin-bottom: var(--space-sm);
}

.prompt-toggle:hover {
  background: rgba(167, 139, 250, 0.15);
  border-color: rgba(167, 139, 250, 0.5);
}

/* ---------- Prompt Modal ---------- */
/* ===== 画像ズームビューアー ===== */
.image-viewer {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: rgba(0, 0, 0, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  cursor: grab;
  overflow: hidden;
  touch-action: none;
}

.image-viewer.active {
  opacity: 1;
  visibility: visible;
}

.image-viewer.dragging {
  cursor: grabbing;
}

.image-viewer-close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  z-index: 10;
  transition: background 0.2s;
}

.image-viewer-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

.image-viewer-hint {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  pointer-events: none;
  z-index: 10;
  transition: opacity 0.5s ease;
  white-space: nowrap;
}

.image-viewer-img {
  max-width: none;
  max-height: none;
  transform-origin: center center;
  transition: transform 0.1s ease-out;
  user-select: none;
  -webkit-user-drag: none;
}

.prompt-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  /* ライトボックスより上 */
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}

.prompt-modal.active {
  opacity: 1;
  visibility: visible;
}

.prompt-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 12, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.prompt-modal-body {
  position: relative;
  z-index: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  max-width: 700px;
  width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  transform: scale(0.92);
  transition: var(--transition-spring);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}

.prompt-modal.active .prompt-modal-body {
  transform: scale(1);
}

.prompt-modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.6rem;
  cursor: pointer;
  transition: var(--transition-fast);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.prompt-modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.prompt-modal-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-shrink: 0;
}

.prompt-icon {
  font-size: 1.2rem;
}

.prompt-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.prompt-modal-content {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-y: auto;
  padding-right: var(--space-sm);
  /* Scrollbar styling for webkit */
}

.prompt-modal-content::-webkit-scrollbar {
  width: 6px;
}

.prompt-modal-content::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
}

.prompt-modal-content::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 10px;
}

.prompt-modal-content::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ---------- Credit Section ---------- */
.credit-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl) 0;
}

.credit-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-smooth);
}

.credit-card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: 0 8px 40px rgba(99, 102, 241, 0.08);
}

/* Header */
.credit-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.credit-icon {
  font-size: 1.2rem;
}

.credit-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.credit-update-date {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 300;
}

/* Progress Bar */
.credit-bar-wrap {
  margin-bottom: var(--space-md);
}

.credit-bar-bg {
  position: relative;
  width: 100%;
  height: 28px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 100px;
  overflow: visible;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.credit-bar-fill {
  height: 100%;
  border-radius: 100px;
  background: var(--accent-gradient);
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1),
    background 0.6s ease;
  position: relative;
  min-width: 0;
  box-shadow: 0 0 20px var(--accent-glow);
}

/* Color states based on remaining percentage */
.credit-bar-fill.level-high {
  background: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.credit-bar-fill.level-mid {
  background: linear-gradient(135deg, #f59e0b, #eab308);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.credit-bar-fill.level-low {
  background: linear-gradient(135deg, #ef4444, #f97316);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

/* Base contract line (1000) */
.credit-bar-base-line {
  position: absolute;
  top: -4px;
  bottom: -4px;
  width: 2px;
  background: var(--text-muted);
  opacity: 0.5;
  display: none;
}

.credit-bar-labels {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-xs);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Details */
.credit-details {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.credit-detail-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.credit-detail-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.04em;
}

.credit-detail-value {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Notes */
.credit-notes {
  border-top: 1px solid var(--border-glass);
  padding-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.credit-note {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Pending State */
.credit-pending-body {
  text-align: center;
  padding: var(--space-lg) 0;
}

.credit-pending-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: var(--space-md);
  animation: pendingPulse 2s ease-in-out infinite;
}

@keyframes pendingPulse {

  0%,
  100% {
    opacity: 0.5;
    transform: scale(1);
  }

  50% {
    opacity: 1;
    transform: scale(1.1);
  }
}

.credit-pending-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.credit-pending-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Error State */
.credit-error-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  padding: var(--space-md) 0;
}

/* ---------- About Modal ---------- */
.about-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}

.about-modal.active {
  opacity: 1;
  visibility: visible;
}

.about-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 12, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.about-modal-body {
  position: relative;
  z-index: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  max-width: 560px;
  width: 90vw;
  transform: scale(0.92);
  transition: var(--transition-spring);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}

.about-modal.active .about-modal-body {
  transform: scale(1);
}

.about-modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.6rem;
  cursor: pointer;
  transition: var(--transition-fast);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.about-modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.about-modal-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.about-icon {
  font-size: 1.1rem;
}

.about-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.about-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.about-list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: var(--space-lg);
  position: relative;
}

.about-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent-3);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.5;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-glass);
  padding: var(--space-xl);
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  text-align: center;
}

.footer-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.footer-sep {
  margin: 0 var(--space-sm);
  opacity: 0.4;
}

.footer-about-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-about-link:hover {
  color: var(--accent-3);
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .hero {
    padding-top: calc(56px + var(--space-sm));
    padding-bottom: var(--space-xs);
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  /* スマホ表示ではロゴを非表示にしてメニュー幅を確保 */
  .logo {
    display: none;
  }

  .header-inner {
    padding: var(--space-sm) var(--space-md);
    gap: 0;
  }

  .header-nav {
    min-width: 0;
    overflow-x: auto;
    gap: var(--space-md);
    padding-bottom: 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    position: relative;
  }
  .header-nav::-webkit-scrollbar {
    display: none;
  }

  /* 横スクロール（スワイプ）可能インジケーター */
  .header-nav::after {
    content: '〉';
    position: sticky;
    right: 0;
    display: flex;
    align-items: center;
    padding-left: 20px;
    padding-right: var(--space-sm);
    color: var(--text-muted);
    font-size: 1.1rem;
    background: linear-gradient(to right, transparent, rgba(10, 10, 20, 0.7) 30%, rgba(10, 10, 20, 0.95));
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    pointer-events: none;
    z-index: 10;
    animation: hintPulse 1.5s infinite;
  }

  .filter-section {
    padding: var(--space-sm) var(--space-md);
  }

  .gallery-section {
    padding: var(--space-lg) var(--space-md) var(--space-2xl);
  }

  .lightbox-content {
    max-width: 95vw;
  }

  .lightbox-close {
    top: var(--space-md);
    right: var(--space-md);
  }

  .credit-section {
    padding: var(--space-md) var(--space-md) 0;
  }

  .credit-card {
    padding: var(--space-md) var(--space-md);
  }

  .about-modal-body {
    padding: var(--space-xl);
  }

  .credit-details {
    gap: var(--space-md);
  }

  .credit-detail-value {
    font-size: 1.1rem;
  }

  /* Training cards: horizontal scroll on mobile */
  .training-section {
    padding: var(--space-md) var(--space-md) 0;
  }

  .training-inner {
    padding: var(--space-md);
  }

  .training-cards {
    grid-template-columns: 1fr;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .training-card {
    padding: var(--space-sm) var(--space-md);
  }

  .training-card-icon {
    width: 40px;
    height: 40px;
    font-size: 1.4rem;
  }

  .training-card-arrow {
    opacity: 0.5;
    transform: translateX(0);
  }
}

/* ---------- Special Highlights ---------- */
.training-card-highlight {
  border-color: rgba(245, 158, 11, 0.4);
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.15);
  animation: cardHighlightPulse 2s infinite alternate;
}

@keyframes cardHighlightPulse {
  0% { 
    box-shadow: 0 0 5px rgba(245, 158, 11, 0.1); 
    border-color: rgba(245, 158, 11, 0.3); 
  }
  100% { 
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.3); 
    border-color: rgba(245, 158, 11, 0.6); 
    background: rgba(245, 158, 11, 0.05); 
  }
}

.nav-link-special {
  color: #f59e0b;
  font-weight: 500;
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 4px 12px !important;
  border-radius: 100px;
  background: rgba(245, 158, 11, 0.05);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.nav-link-special:hover {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b !important;
  transform: translateY(-2px);
}

.nav-link-special::after {
  display: none !important;
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

/* スワイプヒントのアニメーション */
@keyframes hintPulse {
  0%, 100% { transform: translateX(0); opacity: 0.6; }
  50% { transform: translateX(3px); opacity: 1; }
}