/* Calcscape — utilitarian + TreatShelf-style left content / right ad rail */
:root {
  --text: #111;
  --muted: #444;
  --border: #bbb;
  --panel: #f5f5f5;
  --panel-2: #e8e8e8;
  --link: #00e;
  --link-visited: #551a8b;
  --accent: #036;
  --result: #ffffcc;
  --shell-max: 1120px;
  --rail: 280px;
  --font: Arial, Helvetica, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
  background: #fff;
}

a {
  color: var(--link);
}

a:visited {
  color: var(--link-visited);
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.site-header-inner {
  max-width: var(--shell-max);
  width: 100%;
  margin: 0 auto;
  padding: 8px 1.25rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.brand span {
  color: var(--accent);
  font-weight: 700;
}

.brand:visited {
  color: var(--text);
}

.nav-pill {
  font-size: 12px;
  color: var(--muted);
}

/* Left content + reserved right rail (TreatShelf pattern) */
.site-shell {
  max-width: var(--shell-max);
  width: 100%;
  margin: 0 auto;
  padding: 1rem 1.25rem 2.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  min-width: 0;
}

.site-content {
  width: 100%;
  min-width: 0;
  text-align: left;
}

.site-rail {
  display: none;
}

@media (min-width: 960px) {
  .site-shell {
    grid-template-columns: minmax(0, 1fr) var(--rail);
    gap: 2.75rem;
    align-items: start;
  }

  .site-rail {
    display: block;
    position: sticky;
    top: 3.5rem;
    min-height: 1px;
  }
}

.hero {
  margin: 0 0 1rem;
  padding: 0;
}

.brand-mark {
  display: none;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 700;
  color: #000;
  text-align: left;
}

.lede {
  margin: 0;
  color: var(--muted);
  max-width: 46rem;
}

.jump-result {
  margin: 0.65rem 0 0;
  font-size: 13px;
}

.jump-result a {
  font-weight: 700;
}

/* Desktop already shows sticky result beside inputs */
@media (min-width: 720px) {
  .jump-result {
    display: none;
  }
}

.jump-result-back {
  display: none;
  margin: 0 0 8px;
  font-size: 12px;
}

@media (max-width: 719px) {
  .jump-result-back {
    display: block;
  }
}

.calc-layout {
  margin: 0 0 1.25rem;
  display: grid;
  gap: 16px;
}

@media (min-width: 720px) {
  .calc-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 10px 12px 12px;
}

.panel h2,
.result-kicker {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
}

.panel .hint {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px;
}

.field-grid {
  display: grid;
  gap: 8px;
}

@media (min-width: 560px) {
  .field-grid.two {
    grid-template-columns: 1fr 1fr;
  }
}

label {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3px;
  font-size: 13px;
  font-weight: 700;
}

.calc-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--border);
}

.calc-table th,
.calc-table td {
  border: 1px solid var(--border);
  padding: 6px 8px;
  text-align: left;
  vertical-align: middle;
  font-weight: 400;
}

.calc-table th {
  width: 42%;
  background: var(--panel-2);
  font-weight: 700;
  font-size: 13px;
}

.th-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  font-weight: 400;
  cursor: pointer;
}

.info-tip {
  position: relative;
  display: inline-block;
  vertical-align: middle;
}

.info-tip > summary {
  list-style: none;
  cursor: pointer;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid #668;
  background: #fff;
  color: #036;
  font-size: 11px;
  font-weight: 700;
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  line-height: 14px;
  text-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.info-tip > summary::-webkit-details-marker {
  display: none;
}

.info-tip > summary:hover,
.info-tip[open] > summary {
  background: #036;
  color: #fff;
  border-color: #036;
}

.info-tip-body {
  position: absolute;
  z-index: 40;
  left: 0;
  top: calc(100% + 6px);
  width: min(340px, calc(100vw - 24px));
  max-width: min(340px, calc(100vw - 24px));
  padding: 10px 12px;
  background: #fff;
  border: 1px solid #888;
  box-shadow: 1px 1px 0 #ccc;
  font-size: 12px;
  font-weight: 400;
  color: #222;
  line-height: 1.45;
  box-sizing: border-box;
}

/* JS may switch to fixed + set coordinates so tips stay on-screen */
.info-tip-body.is-fixed {
  position: fixed;
  margin: 0;
}

.info-tip-body strong {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
}

.info-tip-body p {
  margin: 0 0 0.55rem;
}

.info-tip-body p:last-child {
  margin-bottom: 0;
}

.guide,
.explain,
.formula,
.example,
.faq {
  margin: 0 0 1.25rem;
  padding: 0;
  max-width: none;
}

.guide h2,
.explain h2,
.formula h2,
.example h2,
.faq h2 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  padding-bottom: 3px;
  text-align: left;
}

.guide ol,
.guide ul {
  margin: 0;
  padding-left: 1.3rem;
  font-size: 13px;
}

.guide li {
  margin-bottom: 5px;
}

.guide p {
  margin: 0 0 8px;
  font-size: 13px;
}

.calc-table input[type="number"],
.calc-table select,
.calc-table input[type="text"] {
  width: 100%;
  max-width: 220px;
}

input[type="number"],
select,
input[type="text"] {
  font: inherit;
  font-size: 14px;
  padding: 4px 6px;
  border: 1px solid #888;
  background: #fff;
  color: var(--text);
  border-radius: 0;
  width: 100%;
}

input[type="number"]:focus,
select:focus,
input[type="text"]:focus {
  outline: 1px solid #36c;
  outline-offset: 0;
}

input:disabled {
  background: #eee;
  color: #777;
}

.subhead {
  margin: 14px 0 6px;
  font-size: 13px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.check-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin: 4px 0;
}

.check input {
  margin: 0;
}

.region-note {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.result {
  background: var(--result);
}

@media (min-width: 720px) {
  .result {
    position: sticky;
    top: 3.5rem;
  }
}

.result-total {
  margin: 0 0 4px;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
}

.result-range {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--muted);
}

.result-split {
  display: grid;
  gap: 4px;
  margin: 0 0 10px;
  padding: 8px 0 0;
  border-top: 1px solid var(--border);
  font-size: 13px;
}

.result-split div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.result-split .oop {
  font-weight: 700;
  font-size: 15px;
}

.breakdown {
  list-style: none;
  margin: 0;
  padding: 0;
  background: #fff;
  border: 1px solid var(--border);
}

.breakdown li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 8px;
  border-bottom: 1px solid #ddd;
  font-size: 13px;
}

.breakdown li:last-child {
  border-bottom: 0;
  font-weight: 700;
  background: var(--panel-2);
}

.disclaimer {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
}

.insurance-fields[hidden],
[hidden] {
  display: none !important;
}

.callout {
  margin: 0 0 12px;
  padding: 8px 10px;
  border: 1px solid #cc9;
  background: #ffc;
  font-size: 13px;
}

.explain-grid {
  display: grid;
  gap: 10px;
}

@media (min-width: 600px) {
  .explain-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.explain-item {
  border: 1px solid var(--border);
  padding: 8px 10px;
  background: #fff;
}

.explain-item h3 {
  margin: 0 0 2px;
  font-size: 14px;
}

.explain-item .range {
  margin: 0 0 4px;
  font-size: 12px;
  color: var(--accent);
  font-weight: 700;
}

.explain-item p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.formula p,
.method p {
  margin: 0 0 0.75rem;
  font-size: 13px;
  color: var(--text);
}

.formula p:last-child,
.method p:last-child {
  margin-bottom: 0;
}

.formula ul,
.method ul {
  margin: 0 0 0.75rem;
  padding-left: 1.3rem;
  font-size: 13px;
}

.formula li,
.method li {
  margin-bottom: 0.35rem;
}

.example p,
.faq p {
  color: var(--text);
  font-size: 13px;
}

.faq details {
  border-top: 1px solid var(--border);
  padding: 8px 0;
}

.faq details:last-child {
  border-bottom: 1px solid var(--border);
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
}

.site-footer {
  margin: 1.5rem 0 0;
  padding: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
}

.site-footer a {
  color: var(--muted);
}

.hub-search {
  margin: 0.85rem 0 0;
  max-width: 32rem;
}

.hub-search input {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--border);
  background: #fff;
  font: inherit;
  font-size: 14px;
}

.hub-search input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hub-section-title {
  margin: 1.35rem 0 0.5rem;
  font-size: 15px;
  font-weight: 700;
}

.hub-popular {
  margin: 0 0 0.25rem;
}

.hub-popular[hidden],
.hub-browse[hidden] {
  display: none !important;
}

.hub-popular-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.55rem;
  margin: 0;
}

.hub-popular-list a {
  display: inline-block;
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

.hub-popular-list a:visited {
  color: var(--text);
}

.hub-popular-list a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hub-browse {
  margin: 0.25rem 0 0.5rem;
}

.hub-cat-grid {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .hub-cat-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 860px) {
  .hub-cat-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.hub-cat-card {
  display: block;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--border);
  background: var(--panel);
  text-decoration: none;
  color: var(--text);
  min-width: 0;
}

.hub-cat-card:visited {
  color: var(--text);
}

.hub-cat-card:hover {
  border-color: var(--accent);
}

.hub-cat-card strong {
  display: block;
  font-size: 14px;
  margin: 0 0 0.15rem;
}

.hub-cat-card span {
  display: block;
  font-size: 12px;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 0.35rem;
}

.hub-cat-card small {
  display: block;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.35;
}

.hub-directory {
  margin: 1rem 0 0;
}

.hub-directory-note {
  margin: 0 0 0.65rem;
  color: var(--muted);
  font-size: 13px;
}

.hub-group {
  margin: 0 0 0.35rem;
  border: 1px solid #ddd;
  background: #fff;
}

.hub-group[hidden] {
  display: none !important;
}

.hub-group > .hub-heading,
.hub-group > summary.hub-heading {
  margin: 0;
  padding: 0.55rem 0.7rem;
  font-size: 14px;
  font-weight: 700;
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: var(--panel);
}

.hub-group > summary.hub-heading::-webkit-details-marker {
  display: none;
}

.hub-group > summary.hub-heading::after {
  content: "+";
  font-weight: 700;
  color: var(--muted);
}

.hub-group[open] > summary.hub-heading::after {
  content: "–";
}

.hub-count {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  margin-right: auto;
  margin-left: 0.45rem;
}

.hub-group .hub-list {
  margin: 0;
  padding: 0 0.7rem 0.35rem;
}

.hub-empty {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hub-empty[hidden] {
  display: none !important;
}

#result,
#inputs,
[id^="cat-"] {
  scroll-margin-top: 12px;
}

.hub-list {
  margin: 0 0 0.75rem;
  padding: 0;
}

.hub-list a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid #ddd;
  font-size: 15px;
  font-weight: 700;
  text-align: left;
}

.hub-list a[hidden] {
  display: none !important;
}

.hub-list a small {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
  margin-top: 2px;
}

.related-calcs {
  margin: 0 0 1.25rem;
}

.related-calcs h2 {
  margin: 0 0 0.45rem;
  font-size: 16px;
  font-weight: 700;
}

.related-calcs-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.related-calcs-list li {
  border-bottom: 1px solid #ddd;
}

.related-calcs-list a {
  display: block;
  padding: 0.55rem 0;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.related-calcs-list a:hover {
  text-decoration: underline;
}

/* Omni-style quick reference charts (static HTML, crawlable) */
.ref-chart {
  margin: 0 0 1.25rem;
}

.ref-chart h2 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
}

.ref-chart > p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  max-width: 46rem;
}

.ref-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0;
  border: 1px solid var(--border);
  background: #fff;
}

.ref-table {
  width: 100%;
  min-width: 280px;
  border-collapse: collapse;
  font-size: 13px;
}

.ref-table th,
.ref-table td {
  border-bottom: 1px solid #ddd;
  border-right: 1px solid #eee;
  padding: 5px 8px;
  text-align: left;
  vertical-align: top;
}

.ref-table th:last-child,
.ref-table td:last-child {
  border-right: 0;
}

.ref-table tr:last-child th,
.ref-table tr:last-child td {
  border-bottom: 0;
}

.ref-table thead th {
  background: var(--panel-2);
  font-weight: 700;
}

.ref-table thead th.num {
  text-align: right;
}

.ref-table td {
  text-align: right;
  white-space: nowrap;
}

.ref-table td.text {
  text-align: left;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.ref-table tbody th {
  font-weight: 400;
  background: #fff;
  white-space: normal;
  text-align: left;
}

.ref-note {
  margin: 6px 0 0;
  font-size: 12px;
  color: var(--muted);
  font-style: italic;
}