/* =============================================
   DATA ARCHITECTURE PAGE — continuous dark surface
   Colors: site tokens only (--ink, --bone, --bronze family)
   ============================================= */

/* This page's hero is dark from the very top, unlike every other page,
   whose nav sits transparent over a light hero. Before the nav gets its
   scrolled (opaque white) background, its default dark-on-transparent
   styling is invisible here — override to light-on-transparent, only
   pre-scroll, only on this page. */
body.dark-hero .nav:not(.nav--scrolled) .nav-logo img {
  content: url('/assets/Logo_White.png');
}
body.dark-hero .nav:not(.nav--scrolled) .nav-link {
  color: rgba(255, 255, 255, 0.75);
}
body.dark-hero .nav:not(.nav--scrolled) .nav-link:hover {
  color: var(--bone);
}
body.dark-hero .nav:not(.nav--scrolled) .nav-link--active {
  color: var(--bronze-light);
}
body.dark-hero .nav:not(.nav--scrolled) .nav-hamburger span {
  background: var(--bone);
}

.data2-hero,
.data2-section {
  background: var(--ink);
  color: var(--bone);
}

.data2-hero {
  padding: 140px 0 64px;
}
.data2-badge {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--bronze-light);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}
.data2-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4.5vw, 58px);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  max-width: 800px;
  color: var(--bone);
}
.data2-hero-sub {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.65);
  max-width: 680px;
  margin: 0 0 32px;
  line-height: 1.7;
}
.data2-hero-sub a {
  color: var(--bronze-light);
  font-weight: 600;
}
.data2-hero-links {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 14px;
  font-weight: 600;
}
.data2-hero-links a {
  color: var(--bone);
}
.data2-hero-links a:hover {
  color: var(--bronze-light);
}

/* Generic section chrome */
.data2-section {
  padding: 72px 0;
}
.data2-section--bordered {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.data2-section--last {
  padding-bottom: 96px;
}
.data2-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: 14px;
}
.data2-h2 {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 28px;
  max-width: 760px;
  color: var(--bone);
}
.data2-body {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.72);
  max-width: 800px;
  line-height: 1.75;
  margin: 0;
}
.data2-body code,
.data2-italic code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: rgba(255, 255, 255, 0.85);
}
.data2-italic {
  margin-top: 28px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.5);
  max-width: 760px;
  font-style: italic;
  line-height: 1.7;
}
.data2-accent-text {
  font-family: var(--font-mono);
  color: var(--bronze-light);
  font-style: normal;
}

/* Node parent-container section */
.data2-node-grid {
  display: flex;
  gap: 48px;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.data2-node-grid .data2-body {
  flex: 1 1 420px;
}
.data2-node-card {
  flex: 0 1 380px;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-sm);
  padding: 24px;
}
.data2-node-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.data2-node-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
}
.data2-node-tag-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
.data2-node-card-note {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 16px;
}
.data2-node-card-rel {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 14px;
  line-height: 1.6;
}
.data2-node-card-example {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  font-family: var(--font-mono);
}

/* The Stack */
.data2-stack-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  text-align: left;
}
.data2-stack-item {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.data2-stack-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
}
.data2-stack-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--bone);
  margin: 0;
}
.data2-stack-desc {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.55;
  margin: 0;
  flex: 1;
}
.data2-stack-file {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--bronze-light);
  word-break: break-word;
}
span.data2-stack-file {
  color: rgba(255, 255, 255, 0.4);
}

/* Pipeline chips */
.data2-pipeline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.data2-pipeline-item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.data2-pipeline-chip {
  padding: 6px 12px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.85);
}
.data2-pipeline-arrow {
  color: rgba(255, 255, 255, 0.3);
}

/* Schema explorer */
.data2-schema-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 12px;
}
.data2-schema-hint {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
}
.data2-explorer {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.data2-explorer-grid {
  flex: 1 1 620px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.data2-card {
  cursor: pointer;
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.14);
  transition: border-color 0.15s, background 0.15s;
}
.data2-card:hover {
  border-color: rgba(255, 255, 255, 0.3);
}
.data2-card--selected {
  background: var(--bronze-glow);
  border: 1px solid var(--bronze);
}
.data2-card--related {
  border: 1px dashed var(--bronze-dim);
}
.data2-card-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}
.data2-card-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}
.data2-card-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--bone);
}
.data2-card-phase {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 8px;
}
.data2-card-blurb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.55;
}

.data2-detail {
  flex: 0 1 380px;
  position: sticky;
  top: 100px;
  padding: 24px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.data2-detail-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}
.data2-detail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bronze-light);
}
.data2-detail-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--bone);
}
.data2-detail-phase {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 16px;
}
.data2-detail-blurb {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 20px;
  line-height: 1.6;
}
.data2-detail-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 8px;
}
.data2-detail-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}
.data2-pill {
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 4px 8px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.09);
  color: rgba(255, 255, 255, 0.85);
}
.data2-pill--optional {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.55);
}
.data2-detail-connects {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.data2-connect-btn {
  text-align: left;
  cursor: pointer;
  border: none;
  padding: 8px 10px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.25);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-family: inherit;
  transition: background 0.15s;
}
.data2-connect-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}
.data2-connect-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--bronze-light);
}

/* Provenance */
.data2-provenance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.data2-provenance-card {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.data2-provenance-key {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--bronze-light);
  margin-bottom: 8px;
}
.data2-provenance-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.55;
}

/* Protocol -> Data table */
.data2-table-wrap {
  overflow-x: auto;
}
.data2-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.data2-table thead tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}
.data2-table th {
  text-align: left;
  padding: 10px 12px;
  color: rgba(255, 255, 255, 0.45);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  font-family: var(--font-mono);
}
.data2-table td {
  padding: 14px 12px;
  color: rgba(255, 255, 255, 0.72);
}
.data2-table tbody tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}
.data2-table td:first-child {
  font-weight: 600;
  white-space: nowrap;
  color: var(--bone);
}
.data2-table td:last-child {
  font-family: var(--font-mono);
  color: var(--bronze-light);
  white-space: nowrap;
}
.data2-footnote {
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.42);
}
.data2-more {
  margin-top: 20px;
}
.data2-more a,
.data2-more-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--bone);
}
.data2-more a:hover,
.data2-more-link:hover {
  color: var(--bronze-light);
}

/* Reference dataset stats */
.data2-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
  padding: 28px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 28px;
}
.data2-stat-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 600;
  color: var(--bronze-light);
}
.data2-stat-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 4px;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 968px) {
  .data2-hero { padding: 120px 0 48px; }
  .data2-explorer-grid { grid-template-columns: repeat(2, 1fr); }
  .data2-provenance-grid { grid-template-columns: repeat(2, 1fr); }
  .data2-stack-grid { grid-template-columns: repeat(2, 1fr); }
  .data2-detail { position: static; flex: 1 1 100%; }
}
@media (max-width: 640px) {
  .data2-hero { padding: 100px 0 40px; }
  .data2-hero-title { font-size: clamp(26px, 7vw, 34px); }
  .data2-hero-sub { font-size: 15px; }
  .data2-section { padding: 48px 0; }
  .data2-node-grid { gap: 28px; }
  .data2-explorer-grid { grid-template-columns: 1fr; }
  .data2-provenance-grid { grid-template-columns: 1fr; }
  .data2-stack-grid { grid-template-columns: 1fr; }
  .data2-stats { gap: 24px; }
  .data2-card { padding: 16px; }
  .data2-detail { padding: 20px; }
}