/* =============================================================
   PROJECT DETAIL PAGE — project.css
   Extends style.css for individual project pages.
   ============================================================= */

/* ---- Hero ---- */
.proj-hero {
  padding-block: var(--space-4xl) var(--space-3xl);
  border-bottom: var(--border);
}

.proj-hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.proj-hero__year {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.proj-hero__title {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-2xl), 6vw, 4.5rem);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-xl);
  background: linear-gradient(135deg, #ffffff 0%, rgba(255,255,255,0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.proj-hero__lead {
  font-size: clamp(var(--fs-base), 2vw, var(--fs-md));
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  max-width: 72ch;
  margin-bottom: var(--space-xl);
}

.proj-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  list-style: none;
}

.proj-hero__tags li {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.75rem;
}

/* ---- Section titles ---- */
.proj-section__title {
  font-family: var(--font-display);
  font-size: clamp(var(--fs-xl), 3vw, var(--fs-2xl));
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

.proj-section__sub {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-2xl);
  max-width: 60ch;
}

/* ---- Overview grid ---- */
.proj-grid {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: clamp(var(--space-2xl), 5vw, var(--space-4xl));
  align-items: start;
}

.proj-content p {
  font-size: var(--fs-md);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-lg);
  max-width: 68ch;
}
.proj-content p:last-child { margin-bottom: 0; }

.proj-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
}

.proj-stat-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.proj-stat {
  background: var(--bg-raised);
  border: var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.proj-stat__val {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--accent);
  line-height: 1;
}

.proj-stat__key {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ---- Diagrams ---- */
.diagram-wrap {
  background: var(--bg-surface);
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  overflow-x: auto;
}

.diagram-wrap--narrow {
  max-width: 420px;
}

.diagram {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- FSM state list ---- */
.fsm-states {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-2xl);
}

.fsm-state {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  background: var(--bg-surface);
  border: var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: border-color var(--transition-base);
}

.fsm-state:hover { border-color: rgba(0,212,255,0.3); }

.fsm-state__num {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--accent);
  opacity: 0.4;
  line-height: 1;
  flex-shrink: 0;
  width: 28px;
}

.fsm-state__name {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.fsm-state p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  max-width: none;
}

/* ---- Technical detail cards ---- */
.proj-details-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.proj-detail-card {
  background: var(--bg-surface);
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.proj-detail-card:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-3px);
}

.proj-detail-card__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.proj-detail-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.proj-detail-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.proj-detail-card__list li {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-normal);
  padding-left: 1rem;
  position: relative;
}

.proj-detail-card__list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: var(--fs-xs);
  top: 3px;
}

/* ---- Results ---- */
.proj-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 800px;
}

.proj-result {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  background: var(--bg-base);
  border: var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.proj-result svg { flex-shrink: 0; margin-top: 2px; }

.proj-result p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  max-width: none;
}

/* ---- Defect context cards ---- */
.defect-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.defect-card {
  background: var(--bg-base);
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--transition-base);
}

.defect-card--shallow { border-left: 3px solid #f87171; }
.defect-card--deep    { border-left: 3px solid #fbbf24; }
.defect-card--shallow:hover { border-color: #f87171; }
.defect-card--deep:hover    { border-color: #fbbf24; }

.defect-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.defect-card__icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--bg-raised);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.defect-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
}

.defect-card__badge {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.55rem;
  margin-left: auto;
}
.defect-card__badge--under { color: #f87171; background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.3); }
.defect-card__badge--over  { color: #fbbf24; background: rgba(251,191,36,0.1);  border: 1px solid rgba(251,191,36,0.3); }

.defect-card > p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-md);
  max-width: none;
}

.defect-card__signals {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.defect-card__signals li {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
}
.defect-card--shallow .defect-card__signals li::before { content: '·'; position: absolute; left: 0; color: #f87171; font-size: 1.2em; line-height: 1; }
.defect-card--deep    .defect-card__signals li::before { content: '·'; position: absolute; left: 0; color: #fbbf24; font-size: 1.2em; line-height: 1; }

/* ---- Detection split panels ---- */
.detect-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.detect-panel__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.detect-panel__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.detect-panel__dot--shallow { background: #f87171; box-shadow: 0 0 8px rgba(248,113,113,0.5); }
.detect-panel__dot--deep    { background: #fbbf24; box-shadow: 0 0 8px rgba(251,191,36,0.5); }

@media (max-width: 768px) {
  .defect-cards  { grid-template-columns: 1fr; }
  .detect-split  { grid-template-columns: 1fr; }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .proj-grid {
    grid-template-columns: 1fr;
  }

  .proj-sidebar {
    position: static;
  }

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

  .diagram-wrap--narrow {
    max-width: 100%;
  }
}