/* ============================================
   Case Study Page - Stylesheet
   ============================================ */

/* --- Page Hero (shared pattern from character.css) --- */
.page-hero {
  position: relative;
  padding: 10rem 0 4rem;
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-hero-bg .hero-shape-1 {
  width: 400px;
  height: 400px;
  top: -15%;
  right: -5%;
  opacity: 0.3;
}

.page-hero-bg .hero-shape-2 {
  width: 300px;
  height: 300px;
  bottom: -20%;
  left: -8%;
  opacity: 0.25;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  transition: opacity var(--transition-base);
}

.breadcrumb:hover {
  opacity: 0.7;
}

.page-title {
  font-family: var(--font-sans);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-description {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.9;
}

/* --- Case Study Content --- */
.case-study-section {
  padding: var(--space-xl) 0 var(--space-3xl);
}

/* Case Header */
.case-header {
  margin-bottom: var(--space-xl);
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-sm);
}

.case-tag {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: white;
  letter-spacing: 0.02em;
}

.case-tag--pink {
  background: var(--color-accent);
}

.case-tag--green {
  background: var(--color-green);
}

.case-title {
  font-family: var(--font-jp);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.case-client {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.case-client strong {
  font-weight: 600;
}

/* Case Visual */
.case-visual {
  margin-bottom: var(--space-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-border-light);
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-visual-placeholder {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: var(--space-lg);
}

.case-visual-placeholder svg {
  display: block;
  margin: 0 auto var(--space-xs);
  opacity: 0.4;
}

/* Case Video (thumbnail + play button) */
.case-video {
  margin-top: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.case-video-link {
  position: relative;
  display: block;
}

.case-video-link img {
  width: 100%;
  display: block;
  transition: transform 0.3s ease;
}

.case-video-link:hover img {
  transform: scale(1.02);
}

.case-video-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 72px;
  height: 72px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 50%;
  transition: background 0.3s ease;
}

.case-video-play::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 54%;
  transform: translate(-50%, -50%);
  border-style: solid;
  border-width: 14px 0 14px 24px;
  border-color: transparent transparent transparent #fff;
}

.case-video-link:hover .case-video-play {
  background: rgba(255, 0, 0, 0.85);
}

/* Case Sections */
.case-section {
  margin-bottom: var(--space-xl);
}

.case-section-label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}

.case-section-title {
  font-family: var(--font-jp);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-sm);
  line-height: 1.5;
}

.case-section p {
  font-size: 1rem;
  line-height: 2;
  margin-bottom: 1rem;
}

.case-section p:last-child {
  margin-bottom: 0;
}

/* Case Highlight */
.case-highlight {
  background: linear-gradient(135deg, rgba(0, 113, 184, 0.06) 0%, rgba(155, 114, 207, 0.06) 100%);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-md) 0;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.9;
  color: var(--color-primary-dark);
}

/* Case Usage Grid */
.case-usage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.case-usage-item {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.case-usage-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.case-usage-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  color: white;
}

.case-usage-icon--blue {
  background: var(--color-primary);
}

.case-usage-icon--pink {
  background: var(--color-accent);
}

.case-usage-icon--green {
  background: var(--color-green);
}

.case-usage-icon--purple {
  background: var(--color-purple);
}

.case-usage-icon--yellow {
  background: #e6a800;
}

.case-usage-item h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.3rem;
}

.case-usage-item p {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* Case Deliverables */
.case-deliverables {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.case-deliverable {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: 0.9rem var(--space-sm);
  box-shadow: var(--shadow-sm);
}

.case-deliverable-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: white;
}

.case-deliverable span {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

/* --- CTA Section --- */
.cta-section {
  padding-bottom: var(--space-3xl);
}

.cta-box {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  color: white;
}

.cta-box h2 {
  font-family: var(--font-jp);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.cta-box p {
  font-size: 0.95rem;
  opacity: 0.9;
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

.cta-box .btn-primary {
  background: white;
  color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.cta-box .btn-primary:hover {
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .case-usage-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 768px) {
  .page-hero {
    padding: 7rem 0 2.5rem;
  }

  .page-title {
    font-size: 2.2rem;
  }

  .case-title {
    font-size: 1.5rem;
  }

  .case-highlight {
    padding: var(--space-sm) var(--space-md);
    font-size: 1rem;
  }

  .case-usage-grid {
    grid-template-columns: 1fr 1fr;
  }

  .case-deliverables {
    grid-template-columns: 1fr;
  }

  .cta-box {
    padding: var(--space-xl) var(--space-md);
  }
}

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

  .case-section-title {
    font-size: 1.2rem;
  }

  .case-visual {
    border-radius: var(--radius-md);
  }
}