/* Ledger — shared stylesheet
   Every data colour encodes which side of the ledger a number sits on. */

:root {
  --ink: #17232B;
  --ink2: #24333D;
  --ink-line: #3A4B55;
  --ink-dim: #9AA9A2;
  --paper: #EDEFEA;
  --paper2: #E3E7DF;
  --line: #C6CCC2;
  --keep: #2C6E49;
  --int: #C08A2E;
  --escrow: #6C8391;
  --alert: #9B3B2E;
  --dim: #5D6B66;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Archivo, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

button { font-family: inherit; cursor: pointer; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--keep); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 10;
  background: var(--ink); color: var(--paper); padding: 10px 16px;
}
.skip:focus { left: 0; }

/* ---------- nav ---------- */
.nav {
  display: flex; align-items: baseline; gap: 28px; flex-wrap: wrap;
  padding: 18px 32px; border-bottom: 1px solid var(--line);
}
.brand {
  font-family: Newsreader, Georgia, "Times New Roman", serif;
  font-size: 22px; letter-spacing: .01em; text-decoration: none;
}
.nav-links { display: flex; gap: 20px; flex-wrap: wrap; }
.nav-links a {
  font-size: 14px; color: var(--dim); text-decoration: none;
  padding: 2px 0; border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--keep); }

/* ---------- shells ---------- */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 32px; }

.tool-head { padding: 52px 0 30px; }
.tool-head h1 {
  font-family: Newsreader, Georgia, serif; font-weight: 400;
  font-size: clamp(32px, 4.4vw, 46px); line-height: 1.06;
  margin: 0 0 12px; letter-spacing: -.015em;
}
.tool-head p.lede { max-width: 58ch; color: var(--dim); font-size: 15.5px; line-height: 1.6; margin: 0; }

.tool-grid {
  display: grid; grid-template-columns: 1fr 1.05fr;
  align-items: start; border: 1px solid var(--line);
}
.inputs { padding: 28px; background: var(--paper2); }
.results { padding: 28px; background: var(--ink); color: var(--paper); position: sticky; top: 0; align-self: start; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
h2.sub, h3.sub {
  font-family: Newsreader, Georgia, serif; font-weight: 400; font-size: 19px;
  margin: 28px 0 14px; padding-top: 16px; border-top: 1px solid var(--line);
}
.inputs > .grid2:first-child + .sub { margin-top: 26px; }

/* ---------- fields ---------- */
.field { display: block; }
.field-label { display: block; font-size: 12.5px; color: var(--dim); margin-bottom: 5px; }
.field-box { display: flex; align-items: center; background: #fff; border: 1px solid var(--line); }
.field-box:focus-within { border-color: var(--ink); }
.field-box input {
  flex: 1; width: 100%; min-width: 0; border: none; background: none;
  padding: 9px 8px; font-size: 16px; font-family: inherit; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.field-box input:focus { outline: none; }
.affix { padding: 0 4px 0 10px; color: var(--dim); font-size: 13px; white-space: nowrap; }
.affix-r { padding: 0 10px 0 4px; }
.field-hint { display: block; font-size: 11.5px; color: var(--dim); margin-top: 4px; min-height: 1em; }

.toggle { display: flex; gap: 10px; align-items: flex-start; margin-top: 18px; font-size: 14px; }
.toggle input { margin-top: 3px; accent-color: var(--keep); width: 15px; height: 15px; flex: none; }
.toggle em { display: block; font-style: normal; font-size: 12.5px; color: var(--dim); margin-top: 2px; }

.btn {
  margin-top: 22px; width: 100%; padding: 11px; background: var(--ink);
  color: var(--paper); border: none; font-size: 14px; font-weight: 500;
}
.btn:hover { background: var(--ink2); }
.btn-quiet { background: none; color: var(--dim); border: 1px solid var(--line); margin-top: 8px; }
.btn-quiet:hover { background: var(--paper2); color: var(--ink); }
.btn-light { background: var(--paper); color: var(--ink); }
.btn-light:hover { background: #fff; }

.modes { display: flex; gap: 1px; background: var(--line); border: 1px solid var(--line); margin-bottom: 20px; }
.modes button { flex: 1; padding: 9px; background: var(--paper); border: none; font-size: 13.5px; color: var(--dim); }
.modes button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.cmp { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 13px; }
.cmp th {
  text-align: left; font-weight: 500; color: var(--dim); font-size: 11.5px;
  padding: 6px 8px 6px 0; border-bottom: 1px solid var(--line);
}
.cmp td { padding: 7px 8px 7px 0; border-bottom: 1px solid var(--line); }
.cmp:empty { display: none; }

/* ---------- results ---------- */
.headline { margin-bottom: 24px; }
.headline-n { font-family: Newsreader, Georgia, serif; font-size: clamp(44px, 6vw, 62px); line-height: 1; }
.headline-n em { font-style: normal; font-size: .36em; color: var(--ink-dim); margin-left: 6px; }
.headline-c { font-size: 13.5px; color: var(--ink-dim); margin-top: 8px; }

.stack-bar { display: flex; height: 9px; overflow: hidden; margin-bottom: 14px; background: var(--ink-line); }
.stack-bar span { display: block; height: 100%; }
.stack-key { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.stack-key li { display: flex; align-items: center; gap: 9px; font-size: 13px; }
.stack-key i { width: 9px; height: 9px; flex: none; }
.stack-key .k { color: var(--ink-dim); }
.stack-key .v { margin-left: auto; }

.rows { margin: 24px 0; border-top: 1px solid var(--ink-line); }
.row {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding: 9px 0; border-bottom: 1px solid var(--ink-line); font-size: 13.5px;
}
.row > span { color: var(--ink-dim); }
.row > b { font-weight: 500; }
.row-big { padding: 13px 0; }
.row-big > b { font-family: Newsreader, Georgia, serif; font-size: 22px; font-weight: 400; }

.chart { margin-top: 24px; }
.chart svg { display: block; width: 100%; height: auto; }
.cap { font-size: 12px; color: #8B9A93; line-height: 1.5; margin: 10px 0 0; }
.inputs .cap { color: var(--dim); }

.scale { margin: -6px 0 22px; }
.scale-bar { position: relative; height: 5px; background: var(--ink-line); }
.scale-fill { height: 100%; }
.scale-mark { position: absolute; top: -4px; bottom: -4px; width: 1px; background: var(--paper); }
.scale-legend { display: flex; justify-content: space-between; font-size: 11px; color: #8B9A93; margin-top: 7px; }

.note, .compare { margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--ink-line); }
.note h3, .compare h3 { font-family: Newsreader, Georgia, serif; font-weight: 400; font-size: 18px; margin: 0 0 8px; }
.note p { font-size: 13px; line-height: 1.6; color: var(--ink-dim); margin: 0; max-width: 56ch; }

.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--ink-line); border: 1px solid var(--ink-line); margin-top: 14px; }
.duo > div { background: var(--ink); padding: 15px; }
.c-lab { display: block; font-size: 12px; color: var(--ink-dim); margin-bottom: 7px; }
.duo b { display: block; font-family: Newsreader, Georgia, serif; font-weight: 400; font-size: 27px; margin-bottom: 8px; }
.duo b em { font-style: normal; font-size: .5em; color: var(--ink-dim); }
.duo p { font-size: 12.5px; line-height: 1.55; color: var(--ink-dim); margin: 0; }

/* ---------- explanatory copy ---------- */
.explain { padding: 56px 0 8px; max-width: 66ch; }
.explain h2 {
  font-family: Newsreader, Georgia, serif; font-weight: 400; font-size: 28px;
  letter-spacing: -.01em; margin: 44px 0 14px;
}
.explain h2:first-child { margin-top: 0; }
.explain h3 { font-size: 16px; font-weight: 600; margin: 26px 0 8px; }
.explain p { font-size: 15.5px; line-height: 1.68; margin: 0 0 16px; }
.explain ul { font-size: 15.5px; line-height: 1.68; padding-left: 20px; margin: 0 0 16px; }
.explain li { margin-bottom: 7px; }
.explain strong { font-weight: 600; }

.faq { border-top: 1px solid var(--line); margin-top: 18px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; padding: 16px 28px 16px 0; font-weight: 500; font-size: 15.5px;
  list-style: none; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 14px;
  font-size: 20px; font-weight: 400; color: var(--dim); line-height: 1;
}
.faq details[open] summary::after { content: "\2013"; }
.faq details > p { margin: 0 0 18px; font-size: 15px; line-height: 1.65; color: var(--dim); max-width: 62ch; }

/* ---------- ad slots ---------- */
/* min-height reserves the space so a late-loading ad doesn't shove the article
   down the page (cumulative layout shift is a ranking signal). */
.ad {
  margin: 40px 0 8px;
  min-height: 100px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}
.ad ins { width: 100%; }
@media print { .ad { display: none; } }

/* ---------- sibling tools ---------- */
.siblings { padding: 48px 0 16px; border-top: 1px solid var(--line); margin-top: 48px; }
.siblings h2 { font-family: Newsreader, Georgia, serif; font-weight: 400; font-size: 24px; margin: 0 0 18px; }
.sib-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.sib-list a { display: block; padding: 15px 18px; background: var(--paper); text-decoration: none; }
.sib-list a:hover { background: var(--paper2); }
.sib-list b { display: block; font-size: 15px; font-weight: 600; margin-bottom: 3px; }
.sib-list span { display: block; font-size: 13.5px; color: var(--dim); line-height: 1.45; }

/* ---------- hub ---------- */
.hero { padding: 72px 0 56px; }
.hero h1 {
  font-family: Newsreader, Georgia, serif; font-weight: 400;
  font-size: clamp(38px, 6.2vw, 68px); line-height: 1.02;
  letter-spacing: -.015em; margin: 0 0 20px;
}
.hero .lede { max-width: 46ch; font-size: 16px; line-height: 1.6; color: var(--dim); margin: 0 0 40px; }
.hero-calc { display: grid; grid-template-columns: 1fr 1.1fr; border: 1px solid var(--line); }
.hero-inputs { padding: 26px; display: grid; gap: 18px; align-content: start; background: var(--paper2); }
.hero-out { padding: 26px; background: var(--ink); color: var(--paper); }

.spine { padding-bottom: 56px; }
.stage { display: grid; grid-template-columns: 52px 1fr; gap: 24px; }
.stage-mark { position: relative; display: flex; justify-content: center; }
.stage-mark::before { content: ""; position: absolute; top: 0; bottom: -1px; width: 1px; background: var(--line); }
.stage-mark span {
  position: relative; z-index: 1; width: 34px; height: 34px; margin-top: 26px;
  border: 1px solid var(--line); border-radius: 50%; background: var(--paper);
  display: flex; align-items: center; justify-content: center;
  font-family: Newsreader, Georgia, serif; font-size: 16px;
}
.branch .stage-mark::before { background: none; border-left: 1px dashed var(--line); width: 0; }
.branch .stage-mark span { border-style: dashed; color: var(--keep); }
.stage-body { padding: 24px 0 34px; }
.stage-body h2 { font-family: Newsreader, Georgia, serif; font-weight: 400; font-size: 27px; margin: 0 0 4px; letter-spacing: -.01em; }
.stage-line { color: var(--dim); font-size: 14.5px; margin: 0 0 18px; max-width: 56ch; }
.tool-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.tool-list > li > * { display: block; padding: 15px 18px; background: var(--paper); text-decoration: none; }
.tool-list b { display: block; font-size: 15px; font-weight: 600; margin-bottom: 3px; }
.tool-list span { display: block; font-size: 13.5px; color: var(--dim); line-height: 1.45; }
.tool-list a:hover { background: var(--paper2); }
.tool-list li.soon > div { background: #E7EAE4; }
.tool-list li.soon b { color: var(--dim); font-weight: 500; }
.tool-list i {
  font-style: normal; font-size: 11px; font-weight: 500; color: var(--dim);
  border: 1px solid var(--line); padding: 1px 6px; margin-left: 9px;
  border-radius: 2px; position: relative; top: -1px;
}

/* ---------- footer ---------- */
.foot { border-top: 1px solid var(--line); padding: 26px 32px 40px; margin-top: 40px; }
.foot p { max-width: 70ch; margin: 0 auto; font-size: 12.5px; color: var(--dim); line-height: 1.6; }
.foot a { color: var(--dim); }

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .tool-grid, .hero-calc { grid-template-columns: 1fr; }
  .results { position: static; }
  .hero { padding: 48px 0 40px; }
  .stage { grid-template-columns: 38px 1fr; gap: 16px; }
  .stage-mark span { width: 26px; height: 26px; font-size: 13px; margin-top: 24px; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .nav { padding: 16px 20px; gap: 16px; }
  .grid2, .duo { grid-template-columns: 1fr; }
  .inputs, .results, .hero-inputs, .hero-out { padding: 20px; }
  .tool-head { padding: 36px 0 24px; }
}

/* ---------- print ---------- */
@media print {
  .nav, .siblings, .btn, .foot { display: none; }
  .tool-grid { grid-template-columns: 1fr 1fr; border-color: #999; }
  .results { background: #fff; color: #000; }
  .row > span, .headline-c, .stack-key .k { color: #444; }
}