/* ─── Infrastructure Page Styles ─── */

/* KPI row 4 columns */
.row4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

/* Map + station list layout (3fr 1fr) */
.infra-map-row {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 1rem;
  align-items: start;
}

/* Station list sidebar */
.station-list-scroll {
  max-height: 340px;
  overflow-y: auto;
}

.station-list-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.875rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  cursor: pointer;
  transition: background 0.12s;
}

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

.station-list-item:hover {
  background: rgba(37, 99, 235, 0.04);
}

.station-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 36px;
}

.station-name-small {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.station-badges {
  display: flex;
  gap: 3px;
  flex-shrink: 0;
}

.station-track-badge {
  font-size: 0.5625rem;
  font-weight: 600;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

.tb-double { background: rgba(37,99,235,0.1); color: #1D4ED8; }
.tb-single { background: rgba(100,116,139,0.1); color: #475569; }

/* Tab bar */
.tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
}

.tab-btn {
  padding: 0.625rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--muted);
  background: none;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--kai-red);
  border-bottom-color: var(--kai-red);
}

.tab-count {
  font-size: 0.6875rem;
  font-weight: 700;
  background: rgba(100,116,139,0.1);
  color: var(--muted);
  padding: 0.1rem 0.4rem;
  border-radius: 100px;
}

.tab-btn.active .tab-count {
  background: rgba(220,38,38,0.1);
  color: #991B1B;
}

/* Track type badges in table */
.track-double { display:inline-flex;align-items:center;gap:4px;padding:0.15rem 0.5rem;border-radius:6px;font-size:0.6875rem;font-weight:600;background:rgba(37,99,235,0.1);color:#1D4ED8; }
.track-single { display:inline-flex;align-items:center;gap:4px;padding:0.15rem 0.5rem;border-radius:6px;font-size:0.6875rem;font-weight:600;background:rgba(100,116,139,0.1);color:#475569; }

/* SVG tooltip */
#svgTooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(15, 23, 42, 0.92);
  color: #fff;
  border-radius: 7px;
  padding: 6px 10px;
  font-size: 0.75rem;
  z-index: 50;
  display: none;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

#svgTooltip .tt-code {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: #60A5FA;
  font-size: 0.75rem;
}

#svgTooltip .tt-name {
  color: #fff;
  font-weight: 600;
  font-size: 0.75rem;
}

#svgTooltip .tt-sub {
  color: #94A3B8;
  font-size: 0.6875rem;
  margin-top: 2px;
}

@media (max-width: 1100px) {
  .infra-map-row {
    grid-template-columns: 1fr;
  }

  .station-list-scroll {
    max-height: 200px;
  }
}