/* Engineering in Practice — editorial / technical, not a venture clone */

.eng-body .vp-content.eng-content {
  max-width: 760px;
}

.eng-hero .eng-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.eng-date,
.eng-client {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 10px;
}

.eng-metrics {
  display: grid;
  gap: 16px;
}

.eng-metrics dt {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.eng-data {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.15rem;
  color: var(--neon-cyan);
  margin: 4px 0;
}

.eng-note,
.eng-data-source {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.eng-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.eng-compare-col {
  padding: 16px;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
}

.eng-notes h2,
.eng-limitations h2 {
  color: var(--text-primary);
}

.eng-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 28px;
}

.eng-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.proof-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  border-left: 3px solid var(--neon-cyan);
  min-height: 100%;
}

.proof-card:hover,
.proof-card:focus-visible {
  border-color: rgba(0, 229, 255, 0.45);
}

.proof-card-top {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.proof-evidence {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 8px;
  border: 1px solid rgba(0, 229, 255, 0.45);
  color: var(--neon-cyan);
}

.proof-evidence--OPERATING {
  border-color: rgba(0, 212, 170, 0.55);
  color: var(--neon-turquoise);
}

.proof-evidence--FIELD_TESTED,
.proof-evidence--PROTOTYPE_TESTED {
  border-color: rgba(255, 213, 79, 0.5);
  color: var(--neon-gold);
}

.proof-evidence--PROTOTYPE,
.proof-evidence--INTERNAL_VALIDATION {
  border-color: rgba(168, 85, 247, 0.5);
  color: #d8b4fe;
}

.proof-type {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.proof-card-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  line-height: 1.25;
}

.proof-card-summary {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.proof-metric {
  margin-top: auto;
}

.proof-metric-value {
  display: block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.05rem;
  color: var(--neon-cyan);
}

.proof-metric-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.proof-card-btn {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--neon-cyan);
}

.proof-card-media img {
  width: 100%;
  height: auto;
  border-radius: 6px;
}

@media (max-width: 1024px) {
  .proof-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .proof-grid,
  .eng-compare-grid {
    grid-template-columns: 1fr;
  }
}