/* ============================================================
   LUMINA Categories — 事例一覧ページ共通スタイル（v3準拠）
   ============================================================ */

:root {
  --c-bg:           #FFFFFF;
  --c-bg-soft:      #FAFAFA;
  --c-bg-dark:      #0A0A0A;
  --c-line:         rgba(10,10,10,0.08);
  --c-line-strong:  rgba(10,10,10,0.18);
  --c-text:         #0A0A0A;
  --c-text-soft:    #4A4A4A;
  --c-text-faint:   #6E6E6E;
  --c-text-onDark:  #F5F5F5;
  --c-amber:        #E8A852;
  --c-amber-deep:   #C98A33;
  --c-amber-soft:   rgba(232,168,82,0.12);
  --c-line-green:   #06C755;
  --f-sans: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --f-serif: "Cormorant Garamond", "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-pill: 999px;
  --shadow-card: 0 24px 60px rgba(0,0,0,0.08);
  --ease: cubic-bezier(0.2, 0.8, 0.3, 1);
  --dur: 0.3s;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  font-family: var(--f-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'palt' 1;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--c-line);
  z-index: 100;
}
.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.brand {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--c-text);
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}
.brand small {
  font-weight: 500;
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--c-text-faint);
  text-transform: uppercase;
}
.header-back {
  font-size: 13px;
  color: var(--c-text-soft);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--dur) var(--ease);
}
.header-back:hover { color: var(--c-text); gap: 10px; }
.header-back::before { content: '←'; }
.header-cta {
  background: var(--c-text);
  color: var(--c-bg);
  padding: 9px 18px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.header-cta:hover { background: #2A2A2A; }

/* Page Hero */
.page-hero {
  padding: 80px 0 56px;
  text-align: center;
  background: var(--c-bg);
}
.page-hero-eyebrow {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--c-amber);
  text-transform: uppercase;
  margin-bottom: 18px;
  font-weight: 600;
}
.page-hero-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--c-text);
  margin-bottom: 20px;
}
.page-hero-lead {
  font-size: 16px;
  color: var(--c-text-soft);
  line-height: 1.9;
  max-width: 640px;
  margin: 0 auto;
}
.page-hero-stats {
  margin-top: 32px;
  display: inline-flex;
  gap: 32px;
  padding: 16px 32px;
  background: var(--c-bg-soft);
  border-radius: var(--r-pill);
  border: 1px solid var(--c-line);
}
.page-hero-stat {
  font-size: 13px;
  color: var(--c-text-soft);
  letter-spacing: 0.04em;
}
.page-hero-stat strong {
  font-weight: 700;
  color: var(--c-text);
  margin-right: 4px;
}

/* Cases Grid */
.cases-section {
  padding: 40px 0 100px;
}
.cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 720px) {
  .cases-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}
@media (min-width: 1100px) {
  .cases-grid { grid-template-columns: repeat(3, 1fr); }
}
.case-card {
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: all var(--dur) var(--ease);
  display: flex;
  flex-direction: column;
}
.case-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-line-strong);
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(232,168,82,0.35), 0 18px 60px rgba(232,168,82,0.20);
}
.case-thumb {
  aspect-ratio: 3 / 4;
  background: var(--c-bg-soft);
  overflow: hidden;
  position: relative;
}
.case-thumb.landscape  { aspect-ratio: 16 / 10; }
.case-thumb.widescreen { aspect-ratio: 16 / 9; }
.case-thumb.square     { aspect-ratio: 1 / 1; }
.case-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;  /* LPサムネはトップから見せる */
  transition: transform var(--dur) var(--ease);
}
.case-thumb.landscape img  { object-position: center center; }
.case-thumb.widescreen img { object-position: center center; }
.case-thumb.square img     { object-position: center center; }
.case-card:hover .case-thumb img { transform: scale(1.04); }
.case-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.35) 50%, transparent 60%);
  transform: translateX(-130%);
  transition: transform 0.7s var(--ease);
  pointer-events: none;
  z-index: 1;
}
.case-card:hover .case-thumb::after { transform: translateX(130%); }
.case-badge {
  position: absolute;
  top: 14px; right: 14px;
  background: var(--c-amber);
  color: var(--c-bg);
  padding: 5px 12px;
  border-radius: var(--r-pill);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
}
.case-badge.muted {
  background: var(--c-bg);
  color: var(--c-text-soft);
  border: 1px solid var(--c-line);
}
.case-body {
  padding: 24px 24px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.case-meta {
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--c-text-faint);
  text-transform: uppercase;
  margin-bottom: 10px;
  font-weight: 600;
}
.case-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.4;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.case-desc {
  font-size: 14px;
  color: var(--c-text-soft);
  line-height: 1.85;
  margin-bottom: 18px;
  flex: 1;
}
.case-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: auto;
}
.btn-open {
  flex: 1;
  background: var(--c-text);
  color: var(--c-bg);
  padding: 11px 16px;
  border-radius: var(--r-sm);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-align: center;
  transition: background var(--dur) var(--ease);
}
.btn-open:hover { background: #2A2A2A; }
.btn-open.disabled {
  background: var(--c-bg-soft);
  color: var(--c-text-faint);
  border: 1px solid var(--c-line);
  cursor: not-allowed;
}
.btn-view {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-line-strong);
  padding: 10px 14px;
  border-radius: var(--r-sm);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  cursor: pointer;
}
.btn-view:hover { background: var(--c-bg-soft); }

/* Lightbox for image preview */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(10,10,10,0.92);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.lightbox.active { display: flex; }
.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
}
.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: rgba(255,255,255,0.1);
  color: var(--c-bg);
  border: 1px solid rgba(255,255,255,0.2);
  width: 40px; height: 40px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
}

/* Other categories link */
.other-cats {
  padding: 80px 0;
  background: var(--c-bg-soft);
  border-top: 1px solid var(--c-line);
}
.other-cats-title {
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--c-text-faint);
  text-transform: uppercase;
  margin-bottom: 36px;
  font-weight: 600;
}
.other-cats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
}
@media (min-width: 720px) { .other-cats-grid { grid-template-columns: repeat(5, 1fr); gap: 16px; } }
.other-cat-link {
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: all var(--dur) var(--ease);
  display: flex;
  flex-direction: column;
}
.other-cat-link:hover {
  border-color: var(--c-amber);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.06);
}
.other-cat-thumb {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--c-bg-soft);
}
.other-cat-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--dur) var(--ease);
}
.other-cat-link:hover .other-cat-thumb img { transform: scale(1.04); }
.other-cat-name {
  text-align: center;
  padding: 12px 8px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text);
  letter-spacing: 0.02em;
}

/* Footer mini */
.footer-mini {
  background: var(--c-bg-dark);
  color: var(--c-text-faint);
  padding: 40px 0;
  text-align: center;
}
.footer-mini-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-bg);
  margin-bottom: 8px;
}
.footer-mini-copy {
  font-size: 11px;
  color: rgba(245,245,245,0.4);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 0.08s; }
.reveal.delay-2 { transition-delay: 0.16s; }
.reveal.delay-3 { transition-delay: 0.24s; }
.reveal.delay-4 { transition-delay: 0.32s; }
.reveal.delay-5 { transition-delay: 0.40s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  *, *::before, *::after { animation: none !important; transition-duration: 0.05s !important; }
}