:root {
  --desk: #262521;
  --paper: #FBF8F1;
  --ink: #1C1B18;
  --muted: #5E5A52;
  --hair: #CFC8B8;
  --track: #E6E0D2;
  --stamp: #B8321C;
  --sans: "Apple SD Gothic Neo", "Noto Sans KR", "Noto Sans CJK KR", "Malgun Gothic", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--desk); color: var(--ink); font: 15px/1.55 var(--sans); word-break: keep-all; overflow-wrap: break-word; text-wrap: pretty; font-variant-numeric: tabular-nums; }
.desk { max-width: 440px; margin: 0 auto; padding: 20px 14px 40px; }
.mast { color: var(--hair); font: 700 12px/1.4 var(--mono); letter-spacing: .08em; margin: 4px 0 14px; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }
.desk > :focus-visible, .modes :focus-visible, .actions :focus-visible, .foot :focus-visible, .link-error :focus-visible { outline-color: var(--paper); }
.link-error :focus-visible { outline-color: var(--ink); }

/* mode switch on the desk */
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 16px; }
.mode { min-height: 48px; padding: 8px 10px; border: 1px solid var(--hair); background: transparent; color: var(--paper); font: 600 15px/1.3 var(--sans); text-align: left; cursor: pointer; transition: background-color .15s; }
.mode[aria-checked="true"] { background: var(--paper); color: var(--ink); border-color: var(--paper); }

/* the slip */
.slip { position: relative; background: var(--paper); padding: 22px 20px 26px; margin: 8px 0 28px; }
.slip::before, .slip::after { content: ""; position: absolute; left: 0; right: 0; height: 8px;
  background: linear-gradient(-45deg, transparent 4px, var(--paper) 0) 0 0 / 8px 8px, linear-gradient(45deg, transparent 4px, var(--paper) 0) 0 0 / 8px 8px; }
.slip::before { top: -8px; transform: scaleY(-1); }
.slip::after { bottom: -8px; }

.ask { margin: 0 0 6px; }
.row { margin: 0 0 10px; }
.field { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: end; gap: 8px; min-height: 48px; }
.field .lab { font-size: 15px; padding-bottom: 10px; }
.field input { width: 100%; min-width: 0; height: 44px; border: 0; border-bottom: 2px solid var(--ink); border-radius: 0; background: transparent; color: var(--ink); font: 700 20px var(--mono); text-align: right; padding: 0 4px; }
.field input[aria-invalid="true"] { border-bottom-color: var(--stamp); }
.field .unit { font-size: 15px; padding-bottom: 10px; min-width: 2.2em; }
.err { margin: 4px 0 0; color: var(--stamp); font-size: 13px; font-weight: 700; }
.err:empty { display: none; }
.help { margin: 4px 0 0; color: var(--muted); font-size: 13px; }

.units { display: grid; grid-template-columns: repeat(3, 1fr); margin: 6px 0 8px; border: 1px solid var(--muted); }
.unit-btn { min-height: 44px; border: 0; border-left: 1px solid var(--muted); background: transparent; color: var(--ink); font: 600 14px/1.2 var(--sans); cursor: pointer; }
.unit-btn:first-child { border-left: 0; }
.unit-btn[aria-checked="true"] { background: var(--ink); color: var(--paper); }

.cond { margin: 12px 0 0; border-top: 1px dashed var(--muted); border-bottom: 1px dashed var(--muted); }
.cond summary { min-height: 44px; padding: 11px 0; cursor: pointer; font: 13px/1.5 var(--mono); color: var(--muted); }
.cond-k { color: var(--ink); font-weight: 700; }
.cond[open] summary { margin-bottom: 6px; }
.check { display: flex; align-items: center; gap: 10px; min-height: 44px; margin: 0 0 8px; font-size: 15px; cursor: pointer; }
.check input { width: 22px; height: 22px; margin: 0; accent-color: var(--ink); }

/* result */
.out { margin-top: 18px; }
.out.stale .lines, .out.stale .total, .out.stale h1, .out.stale .subline { opacity: .45; }
h1 { font: 800 26px/1.25 var(--sans); letter-spacing: -.02em; margin: 0; }
.subline { font: 800 22px/1.3 var(--sans); margin: 2px 0 6px; }
.ask-line { font: 13px/1.5 var(--mono); color: var(--muted); margin: 0 0 10px; }
.lines { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--ink); }
/* flex-wrap, not grid: the label never shrinks below its longest word; the amount drops to the next row instead */
.line { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2px 12px; padding: 9px 0; border-bottom: 1px solid var(--hair); }
.line .lab { flex: 1 1 auto; }
.line-gross .lab { font-weight: 700; }
.amt { font: 600 16px/1.5 var(--mono); text-align: right; white-space: nowrap; }
.line-gross .amt { font-size: 19px; }
.amt { margin-left: auto; }
.note { flex-basis: 100%; font-size: 13px; color: var(--muted); }
.left { flex-basis: 100%; display: flex; align-items: center; gap: 10px; }
.bar { flex: 1; height: 6px; display: block; }
.bar .track { fill: var(--track); }
.bar .keep { fill: var(--ink); }
.bar .bite { fill: var(--stamp); }
.rem { font: 12px/1.4 var(--mono); color: var(--muted); white-space: nowrap; }
.total { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 4px 8px; border-top: 3px double var(--ink); margin-top: 2px; padding: 14px 0 4px; font-weight: 700; }
.total[hidden] { display: none; }
.total-amt { font: 800 30px/1.1 var(--mono); color: var(--stamp); white-space: nowrap; margin-left: auto; }
.say { margin: 10px 0 0; }
.say:empty { display: none; }
.stale-note { margin: 10px 0 0; font-size: 13px; color: var(--muted); }
.full { margin-top: 14px; }
.full summary { min-height: 44px; padding: 11px 0; cursor: pointer; font-weight: 700; font-size: 14px; }
.full table { width: 100%; border-collapse: collapse; font: 13px/1.4 var(--mono); }
.full th, .full td { padding: 6px 0; border-bottom: 1px solid var(--hair); text-align: right; font-weight: 400; }
.full th:first-child { text-align: left; font-family: var(--sans); }
.full tr:first-child th { font-weight: 700; font-family: var(--sans); border-bottom: 2px solid var(--ink); }
.stamp { display: inline-block; border: 2px solid var(--stamp); color: var(--stamp); font: 700 12px/1.3 var(--mono); padding: 3px 6px; transform: rotate(-3deg); margin: 16px 0 0; }

/* actions on the desk */
.actions { margin: 0 0 18px; }
.btn { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 10px 16px; border: 1px solid var(--paper); background: transparent; color: var(--paper); font: 700 16px/1.3 var(--sans); text-align: left; text-decoration: none; cursor: pointer; margin: 0 0 8px; transition: background-color .15s; }
.btn.primary { min-height: 54px; background: var(--stamp); border-color: var(--stamp); color: #fff; font-size: 17px; }
.btn.ink { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn:disabled { opacity: .6; cursor: progress; }
.privacy, .caveat { color: var(--hair); font-size: 13px; margin: 4px 0 0; }
.status { color: var(--paper); font-size: 14px; min-height: 1.5em; margin: 8px 0 0; }
.foot { display: flex; flex-wrap: wrap; gap: 0 18px; margin-top: 18px; }
.foot a { display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; color: var(--paper); font-size: 14px; }

.link-error { background: var(--paper); padding: 18px 20px; margin: 0 0 16px; border: 2px solid var(--stamp); }
.link-error h2 { font: 800 19px/1.35 var(--sans); margin: 10px 0 6px; }
.link-error p { margin: 0 0 12px; }
.link-error .stamp { margin: 0; }
[hidden] { display: none !important; }

/* text pages */
.page { background: var(--paper); padding: 22px 20px 26px; margin: 8px 0 24px; }
.page h1 { margin-bottom: 12px; }
.page h2 { font: 800 18px/1.35 var(--sans); margin: 22px 0 6px; }
.page p, .page li { font-size: 15px; }
.page ul, .page ol { padding-left: 1.2em; }
.page table { width: 100%; border-collapse: collapse; font-size: 13px; }
.page th, .page td { text-align: left; vertical-align: top; padding: 6px 4px; border-bottom: 1px solid var(--hair); }
.page table { table-layout: fixed; }
.page th:first-child { width: 28%; }
.page td.n { font-family: var(--mono); overflow-wrap: anywhere; }
.src { font: 12px/1.5 var(--mono); color: var(--muted); }
.back { display: inline-flex; align-items: center; min-height: 44px; color: var(--paper); }

/* source table stacks into blocks on phones: three columns can't hold Korean words at 320px/zoom */
@media (max-width: 600px) {
  .page table, .page tbody, .page tr, .page td { display: block; width: auto; }
  .page tr:first-child { display: none; }
  .page tr { padding: 8px 0; border-bottom: 1px solid var(--hair); }
  .page td { border: 0; padding: 1px 0; }
  .page td:first-child { font-weight: 700; }
}
/* 200% zoom on a 320px phone leaves a 160px layout: give the words the room */
@media (max-width: 260px) {
  .desk { padding: 12px 4px 28px; }
  .slip, .page, .link-error { padding-left: 10px; padding-right: 10px; }
  .page ul, .page ol { padding-left: 1em; }
  .field { grid-template-columns: minmax(0, 1fr) auto; }
  .field .lab { grid-column: 1 / 3; padding-bottom: 0; }
  .subline { font-size: 19px; }
  .total-amt { font-size: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}