:root {
  --bg: #0b1017;
  --panel: #131b26;
  --panel-alt: #192433;
  --border: #263549;
  --text: #e6edf5;
  --muted: #93a4b8;
  --accent: #38bdf8;
  --emerald: #10b981;
  --amber: #f59e0b;
  --purple: #a855f7;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

code {
  background: rgba(56, 189, 248, 0.12);
  color: #bae6fd;
  padding: 0.12rem 0.36rem;
  border-radius: 4px;
  font-size: 0.86em;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.4rem;
  background: #0e1520;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 40;
}

.brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.65rem;
}

.badge-pill {
  background: rgba(16, 185, 129, 0.16);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.4);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
}

.brand h1 {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 700;
}

.subtitle {
  color: var(--muted);
  font-size: 0.84rem;
}

.topnav {
  display: flex;
  gap: 1.1rem;
  font-size: 0.86rem;
}

.workspace {
  display: grid;
  grid-template-columns: 1fr 380px;
  height: calc(100vh - 58px);
  min-height: 620px;
  border-bottom: 1px solid var(--border);
}

@media (max-width: 1024px) {
  .workspace {
    grid-template-columns: 1fr;
    height: auto;
  }
  .viewport-wrap {
    height: 68vh;
    min-height: 460px;
  }
}

.viewport-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  background: #090d13;
  overflow: hidden;
}

#webgl-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(9, 13, 19, 0.84);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  z-index: 20;
  font-size: 0.92rem;
  color: var(--text);
}

.hidden {
  display: none !important;
}

.spinner {
  width: 34px;
  height: 34px;
  border: 3px solid rgba(56, 189, 248, 0.25);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.85s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hud-top-left {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  z-index: 10;
}

.control-group {
  background: rgba(15, 23, 34, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.45rem 0.65rem;
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
}

.control-group label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.control-group select {
  background: var(--panel-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.28rem 0.45rem;
  font-size: 0.8rem;
}

.btn-row {
  display: flex;
  gap: 0.35rem;
}

.btn {
  background: var(--panel-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.28rem 0.6rem;
  font-size: 0.78rem;
  cursor: pointer;
}

.btn.active {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--accent);
  color: #e0f2fe;
  font-weight: 600;
}

.hud-bottom-bar {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  z-index: 10;
  pointer-events: none;
}

.preset-label {
  background: rgba(15, 23, 34, 0.88);
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--border);
}

.chip {
  pointer-events: auto;
  background: rgba(19, 27, 38, 0.9);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  font-size: 0.76rem;
  cursor: pointer;
}
.chip:hover {
  border-color: var(--accent);
  color: #e0f2fe;
}

.legend-box {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(15, 23, 34, 0.92);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  font-size: 0.76rem;
  z-index: 10;
}

.legend-title {
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: #e2e8f0;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0.2rem 0;
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}
.swatch-osm-exact { background: #10b981; }
.swatch-osm-inferred { background: #f59e0b; }
.swatch-overture { background: #38bdf8; }
.swatch-road { background: #a855f7; }

.walk-hint {
  position: absolute;
  bottom: 52px;
  left: 12px;
  background: rgba(16, 185, 129, 0.18);
  border: 1px solid rgba(16, 185, 129, 0.5);
  color: #d1fae5;
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  font-size: 0.78rem;
  z-index: 10;
}

.inspector {
  background: var(--panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.inspector-section {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border);
}

.inspector-section h2 {
  margin: 0 0 0.55rem 0;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #cbd5e1;
}

.hint {
  margin: 0 0 0.6rem 0;
  font-size: 0.78rem;
  color: var(--muted);
}

.kpi-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.kpi {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
}

.kpi-val {
  display: block;
  font-size: 0.98rem;
  font-weight: 700;
  color: #f8fafc;
}

.kpi-lbl {
  font-size: 0.7rem;
  color: var(--muted);
}

.feature-card {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem;
  font-size: 0.8rem;
}

.empty-state {
  color: var(--muted);
  font-style: italic;
}

.fc-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.fc-id {
  font-family: monospace;
  font-size: 0.74rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.fc-row {
  display: flex;
  justify-content: space-between;
  padding: 0.2rem 0;
  border-bottom: 1px dashed rgba(147, 164, 184, 0.16);
}

.fc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.5rem;
}

.tag-badge {
  font-size: 0.69rem;
  padding: 0.12rem 0.42rem;
  border-radius: 4px;
  font-weight: 600;
}
.tag-source {
  background: rgba(56, 189, 248, 0.16);
  color: #7dd3fc;
  border: 1px solid rgba(56, 189, 248, 0.35);
}
.tag-inferred {
  background: rgba(245, 158, 11, 0.16);
  color: #fcd34d;
  border: 1px solid rgba(245, 158, 11, 0.4);
}
.tag-mapped {
  background: rgba(16, 185, 129, 0.16);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.poi-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 220px;
}

.search-input {
  width: 100%;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
}

.poi-list {
  overflow-y: auto;
  max-height: 260px;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.poi-item {
  background: var(--panel-alt);
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0.38rem 0.55rem;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-size: 0.78rem;
}
.poi-item:hover {
  border-color: var(--accent);
}
.poi-item small {
  display: block;
  color: var(--muted);
  font-size: 0.69rem;
}

.content-section {
  max-width: 1440px;
  margin: 0 auto;
  padding: 2.2rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.section-header h2 {
  margin: 0 0 0.35rem 0;
  font-size: 1.35rem;
}
.section-header p {
  margin: 0 0 1.3rem 0;
  color: var(--muted);
  max-width: 960px;
}

.media-featured {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 1.2rem;
  margin-bottom: 1.4rem;
}

@media (max-width: 960px) {
  .media-featured {
    grid-template-columns: 1fr;
  }
}

.video-card, .rasters-card, .audit-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.video-card h3, .rasters-card h3, .audit-card h3 {
  margin: 0 0 0.7rem 0;
  font-size: 0.96rem;
}

.video-card video {
  width: 100%;
  border-radius: 6px;
  background: #000;
}

.raster-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.raster-grid figure {
  margin: 0;
}
.raster-grid img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.raster-grid figcaption {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.renders-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1rem;
}

.render-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.render-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.render-caption {
  padding: 0.55rem 0.75rem;
  font-size: 0.78rem;
  color: #cbd5e1;
}

.table-wrap {
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.bench-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}

.bench-table th, .bench-table td {
  padding: 0.65rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.bench-table th {
  background: var(--panel-alt);
  color: #cbd5e1;
  font-weight: 600;
}

.suitability-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

@media (max-width: 820px) {
  .suitability-grid, .audit-columns {
    grid-template-columns: 1fr !important;
  }
}

.suit-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1rem;
  font-size: 0.84rem;
}

.audit-columns {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1.2rem;
}

.limitations-list {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.84rem;
  color: #cbd5e1;
}
.limitations-list li {
  margin-bottom: 0.5rem;
}

.download-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.dl-btn {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  font-size: 0.8rem;
  font-family: monospace;
}
.dl-btn:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.footer {
  padding: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}