/* Case study pages — shared editorial layout
   Extends styles.css; keep homepage visual identity. */

.case-page {
  padding-bottom: 4rem;
}

.case-hero {
  padding-top: clamp(2.5rem, 6vh, 4rem);
  padding-bottom: 2.25rem;
  border-bottom: 1px solid var(--line);
}

.case-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
  transition: color var(--dur) var(--ease);
}

.case-back:hover {
  color: var(--text);
}

.case-kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.case-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.65rem;
}

.case-role {
  color: var(--accent);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.case-lede {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.6;
  max-width: 40rem;
  margin-bottom: 1.25rem;
}

.case-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.case-meta-row .detail-badge,
.case-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  border: 1px solid rgba(107, 140, 255, 0.28);
  color: var(--accent);
  background: rgba(107, 140, 255, 0.06);
}

.case-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.15rem;
  margin-top: 1.35rem;
}

.case-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  gap: 2.5rem;
  padding-top: 2.5rem;
  align-items: start;
}

.case-toc {
  position: sticky;
  top: calc(var(--header-h) + 1.25rem);
  padding: 1rem 0;
}

.case-toc p {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.case-toc ol {
  display: grid;
  gap: 0.45rem;
}

.case-toc a {
  font-size: 0.84rem;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.case-toc a:hover,
.case-toc a.is-active {
  color: var(--text);
}

.case-section {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line);
}

.case-section:last-child {
  border-bottom: none;
}

.case-section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2vw, 1.45rem);
  letter-spacing: -0.02em;
  margin-bottom: 0.95rem;
}

.case-section p,
.case-section .eng-note {
  color: var(--muted);
  max-width: 42rem;
  margin-bottom: 0.85rem;
  line-height: 1.65;
}

.case-section .eng-list {
  display: grid;
  gap: 0.55rem;
  max-width: 42rem;
}

.case-section .eng-list li {
  position: relative;
  padding-left: 1rem;
  color: var(--muted);
  line-height: 1.55;
}

.case-section .eng-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.7;
}

.case-arch-flow {
  margin: 1rem 0 1.25rem;
}

.case-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.5rem;
}

.case-tech li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.4rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.case-status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.case-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.case-placeholder-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  max-width: 40rem;
  background: rgba(255, 255, 255, 0.015);
}

/* Evidence / status labels */
.case-strong {
  color: var(--text);
  font-weight: 650;
}

.case-lead {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.65rem;
}

.case-h3 {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 1.35rem 0 0.65rem;
}

.section-label-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.7rem;
  margin-bottom: 0.95rem;
}

.section-label-row h2 {
  margin-bottom: 0;
  margin-right: 0.25rem;
}

.case-section--emphasis {
  padding-top: 2rem;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.28rem 0.55rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
  white-space: nowrap;
}

.status-chip--active {
  color: var(--accent);
  border-color: rgba(107, 140, 255, 0.28);
  background: rgba(107, 140, 255, 0.06);
}

.status-chip--beta {
  color: #c4b5a0;
  border-color: rgba(196, 181, 160, 0.28);
  background: rgba(196, 181, 160, 0.06);
}

.status-chip--built {
  color: #9fd0b0;
  border-color: rgba(159, 208, 176, 0.3);
  background: rgba(159, 208, 176, 0.07);
}

.status-chip--testnet {
  color: var(--accent);
  border-color: rgba(107, 140, 255, 0.28);
  background: rgba(107, 140, 255, 0.06);
}

.status-chip--impl {
  color: #b8c0ce;
  border-color: rgba(255, 255, 255, 0.12);
}

.status-chip--arch {
  color: #8b93a7;
  border-color: rgba(255, 255, 255, 0.1);
}

.status-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.85rem 0 1.1rem;
}

/* Prime Intelligence workflow signals */
.signal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(12.5rem, 1fr));
  gap: 0.45rem 0.65rem;
  max-width: 44rem;
  margin: 0.85rem 0 1rem;
  list-style: none;
}

.signal-grid li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: #c2c8d4;
  padding: 0.55rem 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.015);
}

/* Screenshot — product evidence (Prime Intelligence) */
.product-evidence,
.case-shot {
  display: block;
  width: 100%;
  max-width: none;
  margin: 1.75rem 0 0.5rem;
}

.product-evidence__labels,
.case-shot__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.product-evidence__frame,
.case-shot__frame {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  overflow: hidden;
  background: #050608;
  box-shadow:
    0 0 0 1px rgba(107, 140, 255, 0.06),
    0 18px 40px rgba(0, 0, 0, 0.45);
}

.product-evidence__img,
.case-shot__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border: 0;
  object-fit: contain;
  object-position: top center;
  background: #050608;
}

.product-evidence__caption,
.case-shot__captions {
  display: grid;
  gap: 0.28rem;
  margin-top: 0.75rem;
}

.product-evidence__caption strong,
.case-shot__caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: #c2c8d4;
  line-height: 1.45;
}

.product-evidence__caption span,
.case-shot__caption--secondary {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.03em;
  color: rgba(139, 147, 167, 0.88);
  line-height: 1.45;
}

/* Legacy placeholder styles kept inert */
.case-shot__placeholder {
  display: none;
}

/* Layered architecture */
.arch-stack {
  display: grid;
  gap: 0;
  max-width: 40rem;
  margin: 1.15rem 0 1.5rem;
}

.arch-layer {
  display: grid;
  gap: 0.35rem;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
}

.arch-layer__label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.arch-layer__body {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
}

.arch-layer__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.arch-layer__chips li {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #c2c8d4;
}

.arch-stack__connector {
  width: 1px;
  height: 0.75rem;
  margin-left: 1.4rem;
  background: rgba(107, 140, 255, 0.35);
}

/* Evidence rows */
.evidence-list {
  display: grid;
  gap: 0.55rem;
  max-width: 46rem;
  list-style: none;
  margin: 0.5rem 0 0;
}

.evidence-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.55rem 0.85rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  color: var(--muted);
  line-height: 1.5;
}

.evidence-list li:last-child {
  border-bottom: none;
}

.evidence-list__item {
  flex: 1 1 14rem;
  min-width: 0;
}

/* Domain deep-dive */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.15rem 1.5rem;
  margin-top: 1rem;
}

.domain-block {
  padding-top: 0.15rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.domain-block .case-h3 {
  margin-top: 0.85rem;
}

.domain-block .eng-list {
  max-width: none;
}

.domain-block .status-chip {
  margin-left: 0.35rem;
  vertical-align: middle;
}

/* Decisions */
.decision-list {
  display: grid;
  gap: 0;
  max-width: 44rem;
  margin: 0.35rem 0 0;
}

.decision-item {
  padding: 0.95rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.decision-item:last-child {
  border-bottom: none;
}

.decision-item dt {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.35rem;
  letter-spacing: -0.015em;
}

.decision-item dd {
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 900px) {
  .case-layout {
    grid-template-columns: 1fr;
  }

  .case-toc {
    position: static;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.1rem;
    background: var(--surface);
  }

  .case-toc ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.4rem 1rem;
  }

  .domain-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .case-toc ol {
    grid-template-columns: 1fr;
  }

  .signal-grid {
    grid-template-columns: 1fr;
  }

  .product-evidence,
  .case-shot {
    width: 100%;
    max-width: none;
    margin-inline: 0;
  }

  .product-evidence__frame,
  .case-shot__frame {
    border-radius: 10px;
  }
}

/* Security finding cards (DLT risk audit case study) */
.finding-stack {
  display: grid;
  gap: 1rem;
  margin: 1rem 0 0;
  max-width: 44rem;
}

.finding-card {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  padding: 1rem 1.1rem 1.05rem;
}

.finding-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.65rem;
  margin-bottom: 0.65rem;
}

.finding-card__title {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 650;
  margin: 0;
  letter-spacing: -0.01em;
}

.finding-card dl {
  display: grid;
  gap: 0.55rem;
  margin: 0;
}

.finding-card dt {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}

.finding-card dd {
  margin: 0.15rem 0 0;
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.55;
}

.sev-info {
  color: #b8c0ce;
  border-color: rgba(255, 255, 255, 0.14);
}

.sev-arch {
  color: #8b93a7;
  border-color: rgba(255, 255, 255, 0.12);
}

.method-flow {
  display: grid;
  gap: 0.55rem;
  max-width: 36rem;
  margin: 1rem 0 0;
  counter-reset: method-step;
}

.method-flow li {
  list-style: none;
  position: relative;
  padding: 0.7rem 0.85rem 0.7rem 2.6rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.015);
  color: var(--text);
  font-size: 0.92rem;
}

.method-flow li::before {
  counter-increment: method-step;
  content: counter(method-step);
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  border: 1px solid rgba(107, 140, 255, 0.3);
  background: rgba(107, 140, 255, 0.08);
}

.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
  margin: 1rem 0 0;
  max-width: 44rem;
}

.stats-strip__item {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 0.75rem 0.8rem;
  background: rgba(255, 255, 255, 0.02);
}

.stats-strip__value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.stats-strip__label {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

@media (max-width: 768px) {
  .stats-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 390px) {
  .stats-strip {
    grid-template-columns: 1fr;
  }
}