/* ============================================
   PROJECT CASE STUDY PAGE STYLES
   ============================================ */

/* --- Project Hero Banner --- */
.project-hero {
  padding-top: var(--nav-height);
}

.project-hero-banner {
  width: 100%;
  aspect-ratio: 21 / 8;
  max-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.project-hero-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 30%, rgba(10, 10, 10, 0.4) 100%);
  pointer-events: none;
}

.project-hero-banner-content {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.project-hero-emblem {
  font-family: var(--font-secondary);
  font-size: 72px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.12);
  letter-spacing: 0.12em;
}

.project-hero-banner-subtitle {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* --- Project Metadata --- */
.project-meta {
  padding: 64px var(--container-padding) 48px;
  max-width: calc(var(--container-max) + var(--container-padding) * 2);
  margin: 0 auto;
}

.project-meta-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.project-title {
  font-family: var(--font-secondary);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.project-subtitle {
  font-size: 16px;
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.project-meta-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.project-meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.project-meta-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-meta-value {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-primary);
  line-height: 1.4;
}

/* --- Table of Contents --- */
.project-toc {
  padding: 0 var(--container-padding) 64px;
  max-width: calc(var(--container-max) + var(--container-padding) * 2);
  margin: 0 auto;
  border-bottom: 1px solid var(--color-border);
}

.project-toc-nav {
  display: flex;
  gap: 24px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.project-toc-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
  padding: 8px 0;
}

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

/* --- Project Sections --- */
.project-section {
  padding: 80px var(--container-padding);
  max-width: calc(var(--container-max) + var(--container-padding) * 2);
  margin: 0 auto;
  border-bottom: 1px solid var(--color-border);
}

.project-section:last-of-type {
  border-bottom: none;
}

.project-section-header {
  margin-bottom: 48px;
}

.project-text-block {
  max-width: 720px;
  margin-bottom: 48px;
}

.project-text-lead {
  font-family: var(--font-secondary);
  font-size: 20px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

.project-text-block p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.project-text-block p:last-child {
  margin-bottom: 0;
}

/* --- Stats Row --- */
.project-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.project-stat {
  padding: 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  text-align: center;
}

.project-stat-number {
  font-family: var(--font-secondary);
  font-size: 28px;
  font-weight: 500;
  color: var(--color-text-primary);
  display: block;
  margin-bottom: 8px;
}

.project-stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
}

/* --- Constraints --- */
.project-constraints {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-constraint {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.project-constraint-icon {
  color: var(--color-text-tertiary);
  flex-shrink: 0;
  margin-top: 2px;
}

.project-constraint-title {
  font-family: var(--font-secondary);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.project-constraint-desc {
  font-size: 13px;
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Design Principles --- */
.project-principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-principle {
  padding: 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.project-principle-number {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
  display: block;
  margin-bottom: 16px;
}

.project-principle-title {
  font-family: var(--font-secondary);
  font-size: 17px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 10px;
}

.project-principle-desc {
  font-size: 13px;
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Architecture Grid --- */
.project-arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-arch-card {
  padding: 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: border-color 0.4s ease, transform 0.6s var(--ease-out-expo);
}

.project-arch-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.project-arch-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.project-arch-card-icon {
  color: var(--color-text-tertiary);
}

.project-arch-card-header h4 {
  font-family: var(--font-secondary);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-primary);
}

.project-arch-card p {
  font-size: 13px;
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Features --- */
.project-features {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.project-feature {
  display: flex;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

.project-feature:first-child {
  border-top: 1px solid var(--color-border);
}

.project-feature-number {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
  flex-shrink: 0;
  padding-top: 4px;
}

.project-feature-title {
  font-family: var(--font-secondary);
  font-size: 20px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.project-feature-desc {
  font-size: 14px;
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 640px;
}

/* --- Takeaways --- */
.project-takeaways {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-takeaway {
  padding: 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.project-takeaway-number {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
  display: block;
  margin-bottom: 16px;
}

.project-takeaway-title {
  font-family: var(--font-secondary);
  font-size: 17px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 10px;
}

.project-takeaway-desc {
  font-size: 13px;
  font-weight: 300;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Back Link --- */
.project-back {
  padding: 48px var(--container-padding);
  max-width: calc(var(--container-max) + var(--container-padding) * 2);
  margin: 0 auto;
}

.project-back-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
  transition: color 0.3s ease, gap 0.3s var(--ease-out-expo);
}

.project-back-link:hover {
  color: var(--color-text-primary);
  gap: 16px;
}

/* --- Project Responsive --- */
@media (max-width: 992px) {
  .project-meta-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .project-arch-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-constraints {
    grid-template-columns: 1fr;
  }

  .project-principles {
    grid-template-columns: 1fr;
  }

  .project-stats-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .project-takeaways {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .project-hero-banner {
    aspect-ratio: 16 / 9;
    max-height: 320px;
  }

  .project-hero-emblem {
    font-size: 48px;
  }

  .project-section {
    padding: 60px var(--container-padding);
  }

  .project-meta {
    padding: 40px var(--container-padding) 32px;
  }

  .project-meta-details {
    grid-template-columns: 1fr 1fr;
  }

  .project-arch-grid {
    grid-template-columns: 1fr;
  }

  .project-feature {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .project-hero-emblem {
    font-size: 36px;
  }

  .project-title {
    font-size: 28px;
  }

  .project-meta-details {
    grid-template-columns: 1fr;
  }

  .project-toc-nav {
    flex-direction: column;
    gap: 8px;
  }
}