/* Isolated expansion calculator styles; shared site styles remain untouched. */
.expansion-page .container { width: min(1400px, calc(100% - 2rem)); }
.expansion-page .analysis-intro { max-width: 900px; }
.expansion-page [hidden] { display: none !important; }
.expansion-page #et-storage:empty { display: none; }
.expansion-page #et-controls { border: 0; padding: 0; margin: 0; min-width: 0; }
.expansion-page .et-sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.expansion-page .et-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.expansion-page .et-save-actions { display: flex; align-items: center; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.expansion-page #et-history-toggle[aria-expanded="false"] span { display: inline-block; transform: rotate(-90deg); }
.expansion-page #et-history-panel { margin-top: 1.25rem; padding-top: 1rem; border-top: 1px solid var(--line-soft); }
.expansion-page #et-history-panel table { min-width: 0; table-layout: fixed; font-size: .8rem; }
.expansion-page #et-history-panel th, .expansion-page #et-history-panel td { padding: .4rem; text-align: center; }
.expansion-page #et-history-panel .et-table-wrap { overflow-x: hidden; }
.expansion-page #et-history-panel thead tr:first-child th:not([rowspan]) { padding-bottom: .1rem; border-bottom: 0; }
.expansion-page #et-history-panel .et-history-units th { padding-top: 0; font-weight: 400; }
.expansion-page #et-fluid-panel { margin-top: 1rem; }
.expansion-page .et-panel { min-width: 0; background: #fffcf5; border: 1px solid var(--line-soft, #ccd0ce); border-radius: 8px; padding: 1.25rem; margin: 0 0 1rem; }
.expansion-page h2 { color: var(--navy); font-size: 1.2rem; margin: 0 0 1rem; }
.expansion-page #et-app .et-panel > h2, .expansion-page #et-app .et-panel > summary {
  font-family: inherit;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.05;
  color: var(--site-ink);
}
.expansion-page h3 { font-size: 1rem; margin: 1rem 0 .6rem; }
.expansion-page h2 small { display: block; font-size: .8rem; font-weight: 400; margin-top: .4rem; }
.expansion-page .et-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .9rem; }
.expansion-page .et-fields label { display: flex; flex-direction: column; gap: .35rem; font-size: .85rem; color: var(--navy); }
.expansion-page #et-app .et-fields label,
.expansion-page #et-app #et-checks dt,
.expansion-page #et-app .et-table-wrap th,
.expansion-page #et-app .et-equations tbody td:first-child,
.expansion-page #et-app .et-required > span:first-child { color: var(--site-accent); }
.expansion-page #et-app .et-required-value { color: #f07171; }
.expansion-page .et-fields label em { display: inline; font-weight: 400; }
.expansion-page .et-wide { grid-column: 1 / -1; }
.expansion-page #et-app input, .expansion-page #et-app select { width: 100%; min-width: 85px; min-height: 42px; border: 1px solid #82909d; border-radius: 4px; padding: .5rem; background: white; color: var(--navy); font: inherit; font-weight: 400; }
.expansion-page #et-app input[readonly] { background: #edf0ef; border-color: transparent; }
.expansion-page #et-app button { min-height: 42px; padding: .5rem .85rem; border: 1px solid var(--navy); border-radius: 5px; color: var(--navy); background: var(--offwhite); cursor: pointer; font: inherit; font-size: .85rem; }
.expansion-page #et-app button:hover:not(:disabled) { background: #e5ecf1; }
.expansion-page #et-app .et-primary { background: var(--navy); color: var(--offwhite); }
.expansion-page #et-app .et-primary:hover:not(:disabled) { background: var(--navy-soft); }
.expansion-page #et-app :disabled { opacity: .5; cursor: not-allowed; }
.expansion-page #et-app :focus-visible { outline: 3px solid #b9661a; outline-offset: 3px; }
.expansion-page summary { color: var(--navy); font-size: 1.1rem; cursor: pointer; min-height: 32px; list-style: none; }
.expansion-page #et-app .et-panel[open] > summary { margin-bottom: 1rem; }
.expansion-page #et-app .et-panel > summary small { font-size: .8rem; font-weight: 400; }
.expansion-page summary::-webkit-details-marker { display: none; }
.expansion-page summary::marker { content: ''; }
.expansion-page details > summary::after { content: '▸'; display: inline-block; margin-left: .5rem; transition: transform .2s ease; }
.expansion-page details[open] > summary::after { transform: rotate(90deg); }
.expansion-page .et-help, .expansion-page #et-runtime-status { font-size: .83rem; color: #51595e; line-height: 1.6; }
.expansion-page .et-table-wrap { width: 100%; overflow-x: auto; overscroll-behavior-x: contain; margin: .7rem 0; border: 1px solid var(--line-soft); border-radius: 4px; }
.expansion-page table { width: 100%; min-width: 680px; border-collapse: collapse; font-size: .85rem; text-align: left; font-variant-numeric: tabular-nums; }
.expansion-page th, .expansion-page td { border-bottom: 1px solid var(--line-soft); padding: .6rem; vertical-align: middle; }
.expansion-page th { background: #edf0ef; color: var(--navy); font-weight: 500; }
.expansion-page td { overflow-wrap: anywhere; }
.expansion-page th em { font-weight: 400; white-space: nowrap; }
.expansion-page tbody tr:nth-child(even) { background: #f8f5ee; }
.expansion-page tr:last-child td { border-bottom: 0; }
.expansion-page .et-toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: .7rem 1rem; margin: .8rem 0; justify-content: space-between; font-size: .9rem; }
.expansion-page .et-total { padding: 1rem; border-top: 2px solid var(--line); }
.expansion-page #et-app .et-required { display: flex; align-items: center; justify-content: space-between; gap: .65rem; width: 100%; border: 1px solid var(--site-border); border-radius: 5px; background-color: #080b09; color: #f07171; padding: 1rem; font-size: .95rem; font-weight: 700; }
.expansion-page .et-required-value { display: inline-flex; align-items: baseline; gap: .3rem; white-space: nowrap; }
.expansion-page .et-required output { font: bold 1.8rem Arial, sans-serif; }
.expansion-page #et-checks dl { font-family: Arial, sans-serif; font-size: .9rem; }
.expansion-page #et-checks dl div { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem; padding: .45rem 0; border-bottom: 1px solid var(--line-soft); }
.expansion-page #et-checks dd { margin: 0; font-weight: 400; }
.expansion-page .et-warning { color: #854011; background: #fff1dc; border-left: 3px solid #b36a29; padding: .6rem .8rem; font-size: .83rem; overflow-wrap: anywhere; }
.expansion-page .et-error { color: #86252f; background: #fff0ed; border: 1px solid #ac3742; padding: .8rem; overflow-wrap: anywhere; }
.expansion-page .et-equations, .expansion-page .et-equations table { font-family: Arial, sans-serif; font-weight: 400; }
.expansion-page .et-equations table { min-width: 940px; }
.expansion-page .et-equations b { font-weight: 700; }
.expansion-page .et-equations td:first-child { width: 18%; }
.expansion-page .et-equations td:nth-child(2) { width: 26%; }
.expansion-page .et-red { color: #ac202d; }
.expansion-page .et-note { margin: 2rem 0; border-top: 2px solid var(--line); padding-top: 1.2rem; color: #51595e; font-size: .85rem; line-height: 1.65; }
@media (max-width: 850px) {
  .expansion-page .et-layout { grid-template-columns: 1fr; gap: 0; }
  .expansion-page #et-history-panel thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .expansion-page #et-history-panel table, .expansion-page #et-history-panel tbody, .expansion-page #et-history-panel tr { display: block; }
  .expansion-page #et-history-panel tr { padding: .5rem; border-bottom: 1px solid var(--site-border); }
  .expansion-page #et-history-panel tr:last-child { border-bottom: 0; }
  .expansion-page #et-history-panel td { display: flex; align-items: center; justify-content: space-between; gap: .5rem; padding: .35rem; border: 0; text-align: right; }
  .expansion-page #et-history-panel td::before { content: attr(data-label); text-align: left; font-weight: 600; }
  .expansion-page #et-app #et-history-panel td::before { color: var(--site-accent); }
  .expansion-page #et-history-panel td[colspan] { display: block; text-align: center; }
  .expansion-page #et-history-panel td[colspan]::before { content: none; }
}
@media (max-width: 500px) {
  .expansion-page .et-panel { padding: .85rem; }
  .expansion-page .et-fields { grid-template-columns: 1fr; }
  .expansion-page #et-app .et-required { flex-wrap: wrap; }
  .expansion-page .et-toolbar { justify-content: flex-start; }
}