:root {
  color-scheme: light;
  font-family: Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, #dbeafe 0%, #0f172a 130%);
  color: #0f172a;
}

main {
  width: min(1120px, calc(100vw - 2rem));
  margin: 2rem auto;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 28px;
  padding: 3rem 2rem;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.28);
}

h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 3.25rem);
  text-align: center;
}

.lead {
  margin: 0 auto 2rem;
  max-width: 680px;
  color: #475569;
  font-size: 1.05rem;
  text-align: center;
}

.layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  align-items: start;
}

.panel {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid #dbeafe;
  border-radius: 22px;
  padding: 1.25rem;
  box-shadow: inset 0 0 0 1px rgba(191, 219, 254, 0.35);
}

.nav-link {
  display: block;
  text-decoration: none;
  font-weight: 700;
  border-radius: 18px;
  padding: 1.2rem 1rem;
  transition: transform 0.18s ease, opacity 0.18s ease;
  text-align: center;
}

.nav-link:hover,
.tree-link:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

.residents {
  background: #7ed957;
  color: #0f172a;
}

.administration {
  background: #2fa4d7;
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(47, 164, 215, 0.22);
}

.operations {
  background: #0a2a5e;
  color: #ffffff;
}

.muted {
  margin: 1rem 0 0;
  color: #64748b;
  font-size: 0.94rem;
}

.tree {
  display: grid;
  gap: 0.85rem;
  margin-top: 1rem;
}

.tree-link {
  display: block;
  text-decoration: none;
  border-radius: 14px;
  padding: 0.9rem 1rem;
  background: #f8fafc;
  color: #0f172a;
  border: 1px solid #dbeafe;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.tree-link strong {
  display: block;
  margin-bottom: 0.15rem;
  color: #0369a1;
}

.tree-link span {
  display: block;
  color: #64748b;
  font-size: 0.9rem;
}

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