:root {
  --bg: #f6f1e7; --card: #fff; --ticket: #fffdf7; --text: #2a2a22; --muted: #5d5a4c; --line: #e2d8c4;
  --green: #1f4d3a; --orange: #e3672b; --tape: #f2c230;
  --slab: 'Bitter', Georgia, serif; --mono: 'IBM Plex Mono', ui-monospace, Menlo, monospace;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font: 16px/1.6 'Work Sans', system-ui, -apple-system, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--green); }
.top { border-bottom: 1px solid var(--line); }
.top a { display: block; max-width: 1080px; margin: 0 auto; padding: 16px; font: 800 19px var(--slab); color: var(--green); text-decoration: none; }
.top span { color: var(--orange); }
main { max-width: 1080px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font: 800 clamp(2rem, 5vw, 2.75rem)/1.05 var(--slab); color: var(--green); margin: 0; }
h2 { font: 700 1.5rem/1.2 var(--slab); color: var(--green); margin: 48px 0 8px; }
h3 { font: 700 1.1rem/1.3 var(--slab); margin: 24px 0 4px; }
.lede { color: var(--muted); margin: 10px 0 8px; max-width: 60ch; }
article { max-width: 70ch; }
.tool ~ article { margin-top: 24px; }
article p, article li { color: #3d3a30; }
footer { border-top: 1px solid var(--line); }
footer div { max-width: 1080px; margin: 0 auto; padding: 24px 16px 40px; display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: .9rem; color: var(--muted); }
footer a { color: var(--muted); }
footer span { margin-right: auto; }

/* calculator layout, controls and receipt shared by every tool */
.tool { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: start; }
@media (max-width: 820px) { .tool { grid-template-columns: 1fr; gap: 32px; } }

.lab { display: flex; justify-content: space-between; align-items: end; font-size: .85rem; font-weight: 600; color: var(--green); margin: 22px 0 8px; }
.len { display: flex; align-items: baseline; gap: 4px; font: 700 1.4rem var(--slab); color: var(--text); }
.len input { width: 4.2em; font: inherit; text-align: right; border: 0; border-bottom: 2px dashed var(--line); background: none; color: inherit; padding: 0; }
.len input:focus { outline: none; border-bottom-color: var(--orange); }
.seg { display: flex; gap: 6px; border: 0; padding: 0; margin: 0; }
.seg label { flex: 1; }
.seg.wrap { display: grid; grid-template-columns: repeat(auto-fill, minmax(56px, 1fr)); }
.seg input { position: absolute; opacity: 0; }
.seg span { display: block; text-align: center; padding: 10px 0; border: 1.5px solid #d6cbb3; border-radius: 8px; font-weight: 600; background: #fff; cursor: pointer; }
.seg input:checked + span { background: var(--green); color: #fff; border-color: var(--green); }
.seg input:focus-visible + span { outline: 3px solid var(--orange); outline-offset: 2px; }

details { margin-top: 22px; }
summary { cursor: pointer; font-weight: 600; color: var(--green); }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.grid label { display: block; font-size: .8rem; font-weight: 600; color: var(--muted); margin-bottom: 4px; }
.grid input, .grid select { width: 100%; font: inherit; padding: 9px 10px; border: 1.5px solid #d6cbb3; border-radius: 8px; background: #fff; color: var(--text); }
.grid input:focus, .grid select:focus { outline: 2px solid var(--green); outline-offset: 1px; }
.grid h4 { grid-column: 1 / -1; margin: 10px 0 -4px; font: 700 .95rem var(--slab); color: var(--green); }

.tool > * { min-width: 0; }
.result { position: sticky; top: 16px; }
.result h2 { margin: 0 0 14px; font-size: 1.25rem; }
.note { position: absolute; right: 4px; top: -22px; font: 600 26px 'Caveat', cursive; color: var(--orange); transform: rotate(-4deg); z-index: 1; }
.wrap { filter: drop-shadow(0 10px 18px rgba(60,40,10,.18)); transform: rotate(.5deg); }
.ticket { background: var(--ticket); padding: 30px 24px; font: 13px/1.5 var(--mono);
  --m: conic-gradient(from 135deg at top, #0000, #000 1deg 89deg, #0000 90deg) top / 16px 51% repeat-x,
       conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) bottom / 16px 51% repeat-x;
  -webkit-mask: var(--m); mask: var(--m); }
.ticket h3 { margin: 0; text-align: center; font: 600 14px var(--mono); letter-spacing: .18em; }
.sub { text-align: center; color: #7a6a55; font-size: 11px; margin: 4px 0 14px; text-transform: uppercase; }
.row { display: flex; gap: 8px; padding: 5px 0; }
.row b { width: 36px; text-align: right; flex: none; }
.row span { flex: 1; overflow: hidden; white-space: nowrap; }
.row span::after { content: ' ..................................................................'; color: #b9ab94; }
.dash { border-top: 1px dashed #8a7a62; margin: 10px 0; }
.tot { display: flex; justify-content: space-between; font-size: 18px; font-weight: 600; }
.bars { height: 30px; margin: 16px auto 0; width: 70%; background: repeating-linear-gradient(90deg, var(--text) 0 2px, transparent 2px 4px, var(--text) 4px 7px, transparent 7px 9px, var(--text) 9px 10px, transparent 10px 13px); }
.print { display: block; width: 100%; margin-top: 18px; padding: 12px; border: 0; background: var(--green); color: #fff; font: 600 13px var(--mono); letter-spacing: .08em; text-transform: uppercase; cursor: pointer; }
.print:hover { background: #173a2c; }
.depth { font-size: .85rem; color: var(--muted); margin: 18px 4px 0; }
.error { color: #a12b1f; font-weight: 600; }

.hint { font-size: .85rem; color: var(--muted); margin: 8px 0 0; }
.chart { border-collapse: collapse; width: 100%; max-width: 560px; margin: 12px 0; background: var(--card); font-size: .95rem; }
.chart th, .chart td { padding: 8px 12px; border: 1px solid var(--line); text-align: left; }
.chart th { font: 700 .85rem var(--slab); color: var(--green); background: #fbf8f2; }
.cta { display: inline-block; margin-top: 8px; font-weight: 600; color: var(--orange); }

@media print {
  body { background: #fff; }
  body * { visibility: hidden; }
  .ticket, .ticket * { visibility: visible; }
  .ticket { position: absolute; left: 0; top: 0; width: 100%; -webkit-mask: none; mask: none; font-size: 14px; }
  .print { display: none; }
}