.housing-costs-panel {
  margin: 18px 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,.022);
  overflow: hidden;
}

.housing-costs-panel summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.housing-costs-panel summary::-webkit-details-marker { display: none; }
.housing-costs-panel summary span:first-child { display: grid; gap: 3px; }
.housing-costs-panel summary strong { font-size: 14px; }
.housing-costs-panel summary small { color: var(--muted); font-size: 11px; font-weight: 500; }
.housing-costs-chevron { color: var(--accent); transition: transform .2s ease; }
.housing-costs-panel[open] .housing-costs-chevron { transform: rotate(180deg); }

.housing-costs-body {
  padding: 0 18px 18px;
  border-top: 1px solid rgba(255,255,255,.06);
}

.housing-costs-help {
  margin: 15px 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.housing-costs-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.housing-costs-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

@media (max-width: 720px) {
  .housing-costs-grid { grid-template-columns: 1fr; }
  .housing-costs-panel summary { padding: 14px; }
  .housing-costs-body { padding: 0 14px 14px; }
}