:root {
  color-scheme: light;
  --paper: #fcfcfc;
  --stone: #f5f3ef;
  --ink: #242426;
  --muted: #626266;
  --line: #c9c8c5;
  --on-dark: #ffffff;
  --positive: #286141;
  --negative: #a22b28;
  --font-sans: "Helvetica Neue", Helvetica, "Segoe UI", Roboto, Arial, "Liberation Sans", sans-serif;
  --font-text: "Iowan Old Style", "Hoefler Text", Charter, "Charis SIL", "Palatino Linotype", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --t-body: 19px;
  --t-data: 17px;
  --t-ui: 16px;
  --t-meta: 14px;
  --t-micro: 13px;
}
* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body { margin: 0; background: var(--paper); color: var(--ink); font: var(--t-body)/1.6 var(--font-sans); }
button, input, select { font: inherit; }
button, input, select, summary { min-height: 44px; border-radius: 0; }
button, input, select { font-size: var(--t-ui); }
button, input, select { border: 1px solid var(--muted); background: var(--paper); color: var(--ink); padding: 10px 12px; }
button { cursor: pointer; font-weight: 600; line-height: 1.35; }
button:hover { background: var(--stone); }
button:disabled { cursor: not-allowed; opacity: .6; }
button.primary { color: var(--on-dark); background: var(--ink); border-color: var(--ink); }
button.primary:hover { background: var(--muted); }
input, select { width: 100%; min-width: 0; }
input[aria-invalid="true"] { border: 2px solid var(--negative); }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
:where(a, button, input, select, summary, [tabindex]):focus-visible { outline: none; box-shadow: 0 0 0 3px var(--on-dark), 0 0 0 6px var(--ink); }
:focus:not(:focus-visible) { outline: none; }
[hidden] { display: none !important; }
h1, h2, h3, p, dl { margin: 0; }
h1, h2, h3 { line-height: 1.12; }
h1 { font-size: clamp(min(52px, 12.6vw), 7vw, 84px); letter-spacing: -.022em; font-weight: 600; margin-top: 16px; }
h2 { font-size: clamp(30px, 3.2vw, 40px); font-weight: 500; max-width: 22ch; }
h3 { font-size: 25px; font-weight: 500; }
strong { font-weight: 600; }
.wrap { max-width: 1336px; margin: 0 auto; padding: 0 32px; }
.masthead { padding-top: 12px; padding-bottom: 12px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.wordmark { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; font-size: var(--t-data); font-weight: 700; letter-spacing: -.03em; }
.edition { color: var(--muted); font-size: var(--t-meta); }
.intro { padding: 40px 0 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.eyebrow { text-transform: uppercase; letter-spacing: .13em; font-size: var(--t-micro); line-height: 1.5; }
.lede { font: 24px/1.4 var(--font-text); margin-top: 24px; max-width: 24ch; }
.scope { display: grid; align-content: center; gap: 16px; font-size: var(--t-data); max-width: 55ch; }
.context-links { display: grid; gap: 4px; }
.guide-link { display: flex; align-items: center; padding: 8px 0; min-height: 44px; align-self: start; font-size: var(--t-ui); }
.browser-note { font-size: var(--t-data); margin-bottom: 24px; max-width: 92ch; }
.test-walkthrough { border-top: 1px solid var(--line); }
.test-walkthrough summary { cursor: pointer; font-size: var(--t-ui); padding: 12px 0; font-weight: 600; }
.walkthrough-content { font-size: var(--t-data); max-width: 82ch; padding: 12px 0 24px; }
.walkthrough-content ol { padding-left: 24px; margin: 16px 0; }
.walkthrough-content li + li { margin-top: 12px; }
.notice { padding: 16px 20px; border-left: 4px solid var(--negative); background: var(--stone); font-size: var(--t-data); margin-bottom: 24px; }
.status { font-size: var(--t-data); }
.status:not(:empty) { padding: 16px 0; border-top: 1px solid var(--line); }
.workspace { border-top: 2px solid var(--ink); }
.trip-heading { display: flex; justify-content: space-between; gap: 32px; padding: 32px 0; }
.trip-heading .eyebrow { margin-bottom: 12px; }
.people { margin-top: 12px; color: var(--muted); font-size: var(--t-data); }
.trip-summary { display: flex; flex-wrap: wrap; gap: 48px; flex-shrink: 0; align-items: center; font-variant-numeric: tabular-nums lining-nums; }
.trip-summary dt { font-size: var(--t-meta); color: var(--muted); }
.trip-summary dd { margin: 4px 0 0; font-size: 30px; line-height: 1.3; }
.trip-summary .code { font-family: var(--font-mono); font-size: var(--t-data); letter-spacing: .08em; }
.trip-tools { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.trip-tools summary { cursor: pointer; font-size: var(--t-ui); padding: 12px 0; font-weight: 600; }
.trip-tools[open] { padding-bottom: 24px; }
.trip-tools > .note { max-width: 82ch; margin: 12px 0 24px; }
.trip-tools-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 32px; }
.trip-tools form { display: grid; align-content: start; gap: 12px; }
.trip-tools form button { justify-self: start; }
.sample-reset { display: grid; align-content: start; gap: 16px; }
.sample-reset button { justify-self: start; }
.view-switch { display: flex; gap: 8px; margin: 24px 0 32px; border-bottom: 1px solid var(--line); }
.view-switch button { background: transparent; border: 0; border-bottom: 3px solid transparent; padding: 12px 20px; margin-bottom: -1px; }
.view-switch button[aria-pressed="true"] { border-bottom-color: var(--ink); }
.view-switch button:hover { background: var(--stone); }
.view { padding-bottom: 48px; }
.expenses-layout { display: grid; grid-template-columns: minmax(270px, 340px) minmax(0, 1fr); gap: 64px; }
.expense-form > h3 { margin-bottom: 8px; }
.expense-form > label { display: block; margin: 20px 0 8px; }
label, legend { font-size: var(--t-ui); font-weight: 600; }
.form-pair { display: grid; grid-template-columns: 1fr 1.15fr; gap: 12px; margin-top: 20px; }
.form-pair label { display: block; margin-bottom: 8px; }
.form-pair + .note { margin-top: 8px; }
.note { font-size: var(--t-meta); line-height: 1.5; color: var(--muted); }
fieldset { border: none; margin: 24px 0; padding: 0; min-width: 0; }
legend { padding: 0; margin-bottom: 8px; }
.split-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 8px; }
.split-choices label { display: flex; gap: 10px; align-items: center; padding: 8px 12px; min-height: 44px; border: 1px solid var(--line); cursor: pointer; font-weight: 400; }
.split-choices label:has(input:checked) { border-color: var(--ink); background: var(--stone); }
.split-choices input { accent-color: var(--ink); width: 20px; height: 20px; min-height: 20px; margin: 0; }
.form-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.form-error { color: var(--negative); font-size: var(--t-data); margin: 12px 0; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.section-heading + .note { margin-top: 16px; max-width: 80ch; }
.expense-list, .settlement-list { margin: 0; padding: 0; list-style: none; }
.expense-item { border-top: 1px solid var(--line); padding: 20px 0; }
.expense-line { display: flex; justify-content: space-between; align-items: start; gap: 16px; }
.expense-title { font-size: var(--t-data); font-weight: 600; }
.expense-money { font-size: var(--t-data); font-variant-numeric: tabular-nums lining-nums; white-space: nowrap; }
.expense-meta { font-size: var(--t-meta); color: var(--muted); margin-top: 4px; }
.expense-split { display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; margin-top: 12px; font-size: var(--t-meta); }
.split-badge { font-size: var(--t-micro); text-transform: uppercase; letter-spacing: .04em; border: 1px solid var(--line); padding: 2px 6px; }
.expense-actions { display: flex; gap: 12px; margin-top: 12px; }
.expense-actions button { padding: 8px 12px; }
.empty { padding: 24px 0; font-size: var(--t-data); }
.balance-list { margin-top: 32px; }
.balance-row { display: grid; grid-template-columns: minmax(80px, 1fr) 3fr; gap: 24px; padding: 24px 0; border-top: 1px solid var(--line); }
.balance-name { font-weight: 600; font-size: var(--t-data); }
.balance-values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.balance-values dt { font-size: var(--t-meta); color: var(--muted); }
.balance-values dd { font-size: var(--t-data); font-variant-numeric: tabular-nums lining-nums; margin: 4px 0 0; }
.positive { color: var(--positive); }
.negative { color: var(--negative); }
.balance-total { border-top: 2px solid var(--ink); padding: 16px 0; display: flex; justify-content: space-between; max-width: 100%; font-size: var(--t-data); }
#settlement-view > .note { margin: 16px 0 32px; }
.settlement-list li { border-top: 1px solid var(--line); padding: 24px 0; font-size: var(--t-data); display: flex; justify-content: space-between; gap: 16px; }
.settlement-list strong { font-variant-numeric: tabular-nums lining-nums; white-space: nowrap; }
.footer { border-top: 1px solid var(--line); padding-top: 24px; padding-bottom: 32px; color: var(--muted); font-size: var(--t-meta); }
.footer p + p { margin-top: 8px; }
.skip-link { position: absolute; top: -100px; left: 24px; padding: 12px 16px; background: var(--paper); z-index: 2; }
.skip-link:focus-visible { top: 12px; }
@media (min-width: 1200px) {
  :root { --t-body: 21px; --t-data: 19px; --t-ui: 17px; --t-meta: 15px; --t-micro: 14px; }
}
@media (max-width: 1000px) {
  .intro { gap: 32px; }
  .expenses-layout { gap: 32px; }
  .trip-summary { gap: 24px; }
  .trip-tools-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .sample-reset { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; }
}
@media (max-width: 680px) {
  .wrap { padding-left: 20px; padding-right: 20px; }
  .masthead { align-items: start; gap: 16px; }
  .edition { max-width: 16ch; text-align: right; }
  .intro { display: block; padding-top: 24px; padding-bottom: 20px; }
  .lede { font-size: 21px; margin-top: 16px; }
  .scope { margin-top: 20px; gap: 12px; }
  .trip-heading { display: block; padding-top: 24px; padding-bottom: 24px; }
  .trip-summary { margin-top: 24px; justify-content: space-between; }
  .trip-summary dd { font-size: 26px; }
  .trip-tools-grid, .expenses-layout { grid-template-columns: 1fr; }
  .sample-reset { display: grid; }
  .expenses-layout { gap: 40px; }
  .view-switch { gap: 0; }
  .view-switch button { flex: 1; padding-left: 8px; padding-right: 8px; }
  .section-heading { align-items: start; }
  .section-heading .note { text-align: right; }
  .balance-row { display: block; padding: 20px 0; }
  .balance-values { margin-top: 12px; gap: 8px; }
  .balance-values dd { overflow-wrap: anywhere; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }