:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #5b6472;
  --line: #d7dce3;
  --accent: #183153;
  --building: rgba(220, 38, 38, 0.18);
  --building-stroke: rgba(185, 28, 28, 0.9);
  --number: rgba(37, 99, 235, 0.22);
  --number-stroke: rgba(29, 78, 216, 0.95);
  --legend: rgba(16, 185, 129, 0.16);
  --legend-stroke: rgba(5, 150, 105, 0.95);
  --parking: rgba(168, 85, 247, 0.16);
  --parking-stroke: rgba(126, 34, 206, 0.95);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  text-align: center;
  padding: 24px 16px 18px;
}
.site-header h1 {
  margin: 0 0 8px;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}
.site-header p {
  margin: 0;
  color: var(--muted);
}
.page-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}
.map-card, .content-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  overflow: hidden;
}
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
button, .button-link {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--accent);
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
button:hover, .button-link:hover, .text-link:hover { filter: brightness(0.97); }
.text-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.map-wrapper {
  padding: 16px;
}
.campus-map {
  display: block;
  width: 100%;
  height: auto;
  background: #fff;
}
.hotspot rect, .hotspot circle {
  vector-effect: non-scaling-stroke;
  transition: opacity 120ms ease, fill 120ms ease, stroke 120ms ease;
  cursor: pointer;
}
.building-area rect { fill: transparent; stroke: transparent; stroke-width: 1.5; }
.map-number circle { fill: transparent; stroke: transparent; stroke-width: 1.5; }
.legend-row rect { fill: transparent; stroke: transparent; stroke-width: 1.5; }
.parking rect { fill: transparent; stroke: transparent; stroke-width: 1.5; }
.show-hotspots .building-area rect,
.building-area:hover rect,
.building-area:focus rect { fill: var(--building); stroke: var(--building-stroke); }
.show-hotspots .map-number circle,
.map-number:hover circle,
.map-number:focus circle { fill: var(--number); stroke: var(--number-stroke); }
.show-hotspots .legend-row rect,
.legend-row:hover rect,
.legend-row:focus rect { fill: var(--legend); stroke: var(--legend-stroke); }
.show-hotspots .parking rect,
.parking:hover rect,
.parking:focus rect { fill: var(--parking); stroke: var(--parking-stroke); }
.page-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}
.content-card {
  max-width: 960px;
  margin: 28px auto;
  padding: 24px;
}
.kicker {
  display: inline-block;
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 6px;
}
.content-card h1 {
  margin: 0 0 12px;
}
.content-card p {
  line-height: 1.55;
}
.placeholder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 22px;
}
.placeholder-box {
  border: 1px dashed var(--line);
  border-radius: 14px;
  padding: 16px;
  min-height: 130px;
  background: #fafbfc;
}
.placeholder-box h2 {
  margin-top: 0;
  font-size: 1rem;
}
@media (max-width: 640px) {
  .content-card { padding: 18px; border-radius: 14px; }
  .toolbar { align-items: stretch; }
}