:root {
  color-scheme: light;
  --ink: #193c30;
  --text: #21332c;
  --muted: #52645b;
  --line: #c4cec4;
  --paper: #fffefa;
  --pale: #eef2ec;
  --focus: #a66522;
  --error: #8b3028;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: #f5f4ec; font: 16px/1.6 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
button, input, select { font: inherit; }
button, a, input, select, .table-wrap { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
.skip-link { position: absolute; left: 20px; top: -80px; z-index: 2; padding: 12px 18px; background: white; color: var(--ink); }
.skip-link:focus { top: 12px; }
.site-header, main, footer { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }
.site-header { padding: 24px 0; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: flex; gap: 12px; align-items: center; color: var(--ink); font: 700 31px/1 Georgia, serif; letter-spacing: -.04em; }
.brand img { border-radius: 8px; flex: none; }
.header-note { color: var(--muted); font-size: 13px; }
.intro { padding: 48px 0 30px; }
.eyebrow { margin: 0 0 12px; color: var(--ink); font-size: 11px; line-height: 1.4; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { color: var(--ink); }
h1 { max-width: 850px; margin: 0 0 18px; font: 700 clamp(36px, 5.5vw, 61px)/1.07 Georgia, serif; letter-spacing: -.035em; }
.lede { max-width: 730px; margin: 0; color: var(--muted); font-size: 17px; }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr); gap: 24px; align-items: start; }
.card { min-width: 0; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 28px; box-shadow: 0 8px 25px #21332c05; }
h2 { margin: 0 0 12px; font: 700 27px/1.2 Georgia, serif; letter-spacing: -.015em; }
h3 { margin: 0 0 8px; font-size: 16px; line-height: 1.35; }
p { margin: 0 0 16px; }
.help { margin-bottom: 20px; color: var(--muted); font-size: 14px; }
.input-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
label { display: block; margin-bottom: 7px; color: var(--ink); font-size: 13px; font-weight: 700; }
input, select { width: 100%; min-width: 0; height: 51px; border: 1px solid #8ea295; border-radius: 6px; padding: 10px 12px; background: white; color: var(--text); }
input { font-size: 19px; font-variant-numeric: tabular-nums; }
input[aria-invalid="true"], select[aria-invalid="true"] { border: 2px solid var(--error); }
.buttons { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 0; }
button { min-height: 44px; border: 1px solid var(--ink); border-radius: 6px; padding: 10px 16px; color: white; background: var(--ink); font-size: 13px; font-weight: 700; cursor: pointer; }
button:hover { background: #28563f; }
button span { margin-left: 8px; }
button.secondary { color: var(--ink); background: transparent; border-color: var(--line); }
button.secondary:hover { background: var(--pale); }
.error { min-height: 24px; margin: 8px 0 10px; color: var(--error); font-size: 13px; line-height: 1.5; }
.results { padding: 19px 18px 16px; background: var(--pale); border-radius: 7px; }
.results h3 { font-size: 13px; font-weight: 700; }
.result-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; margin: 13px 0 12px; }
.result-grid dt { color: var(--muted); font-size: 11px; }
.result-grid dd { margin: 3px 0 0; display: flex; gap: 5px; align-items: baseline; flex-wrap: wrap; line-height: 1.15; }
.result-grid output { font: 700 24px/1.2 Georgia, serif; letter-spacing: -.025em; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.result-grid dd span { font-size: 11px; color: var(--muted); }
.result-note, .rounding-note { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.rounding-note { margin: 13px 0 0; }
.noscript { margin: 16px 0 0; padding: 12px; border-left: 3px solid var(--focus); font-size: 13px; }
.reference { padding-bottom: 22px; }
.reference > p:not(.eyebrow) { margin: 15px 0 18px; color: var(--muted); font-size: 14px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; min-width: 305px; border-collapse: collapse; text-align: left; font-size: 13px; font-variant-numeric: tabular-nums; }
caption { caption-side: bottom; text-align: left; padding-top: 14px; color: var(--muted); font-size: 12px; line-height: 1.55; }
th, td { border-bottom: 1px solid var(--line); padding: 12px 7px; }
thead th { padding-top: 8px; color: var(--muted); font-size: 11px; font-weight: 600; }
tbody th { color: var(--ink); font-weight: 700; }
.example-row { background: var(--pale); }
.guide { margin-top: 54px; padding-top: 34px; border-top: 1px solid var(--line); }
.guide > h2 { margin-bottom: 27px; font-size: 33px; }
.guide-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.guide-columns p { color: #42574a; font-size: 14px; line-height: 1.75; }
.guide-columns h3 { margin-bottom: 12px; }
a { color: var(--ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
.privacy { margin: 26px 0 45px; padding: 20px 24px; border-left: 3px solid #8ea295; background: #ecefe5; border-radius: 0 6px 6px 0; }
.privacy h2 { margin-bottom: 7px; font: 700 15px/1.4 system-ui, sans-serif; letter-spacing: 0; }
.privacy p { margin: 0; color: var(--muted); font-size: 13px; }
footer { padding: 22px 0 30px; display: flex; gap: 15px; justify-content: space-between; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
footer > :first-child { color: var(--ink); font-weight: 700; }
@media (max-width: 860px) {
  .tool-grid { grid-template-columns: 1fr; }
  .guide-columns { gap: 25px; }
  .reference h2 br { display: none; }
}
@media (max-width: 580px) {
  .site-header, main, footer { width: calc(100% - 36px); }
  .site-header { padding: 20px 0; }
  .header-note { max-width: 95px; font-size: 11px; text-align: right; }
  .intro { padding-top: 35px; }
  .lede { font-size: 15px; }
  .card { padding: 22px 18px; }
  .input-row { grid-template-columns: minmax(0, 1fr) 146px; gap: 11px; }
  select { padding-inline: 8px; font-size: 13px; }
  .result-grid { gap: 7px; }
  .result-grid output { font-size: 21px; }
  .buttons { display: grid; }
  button { width: 100%; text-align: center; }
  .guide { margin-top: 37px; padding-top: 26px; }
  .guide > h2 { font-size: 29px; }
  .guide-columns { grid-template-columns: 1fr; gap: 12px; }
  .privacy { padding: 18px; }
  footer { flex-direction: column; gap: 6px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }