:root {
  --bg: #eef2f0;
  --surface: #ffffff;
  --ink: #16211f;
  --muted: #3b4a46;
  --line: #c3cfca;
  --field: #6f817b;
  --accent: #0b6a60;
  --accent-ink: #ffffff;
  --accent-soft: #dcece8;
  --err: #a1251a;
  --mat: #1f5f50;
  --mat-line: #2f7464;
  --qa: #e3a93b;
  --qb: #c4553b;
  --qc: #7cbcb0;
  --qbg: #f7f1e3;
  --r: 6px;
  --head: Rockwell, "Rockwell Nova", "Roboto Slab", "Zilla Slab", "DejaVu Serif", Georgia, serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121816;
    --surface: #1a2220;
    --ink: #e6eeec;
    --muted: #bccac6;
    --line: #3a4a46;
    --field: #7f938d;
    --accent: #6ccabd;
    --accent-ink: #0b1a17;
    --accent-soft: #1f3a35;
    --err: #ff9b8c;
    --mat: #173f36;
    --mat-line: #22554a;
    --qa: #c99331;
    --qb: #b04e37;
    --qc: #5f9e93;
    --qbg: #e9e0cc;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--body); }
a { color: var(--accent); text-underline-offset: 2px; }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 16px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -9999px; top: 0; background: var(--surface); color: var(--ink); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; top: 8px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.top { background: var(--ink); color: var(--bg); }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 6px 16px; flex-wrap: wrap; padding: 8px 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 19px/1.2 var(--head); color: var(--bg); text-decoration: none; min-height: 44px; }
.mark { width: 30px; height: 30px; flex: none; }
.m-bg { fill: #f7f1e3; } .m-p { fill: #e3a93b; } .m-q { fill: #c4553b; }
.nav { display: grid; grid-template-columns: repeat(4, auto); gap: 0 2px; }
.nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 10px; color: var(--bg); text-decoration: none; border-bottom: 3px solid transparent; font-size: 16px; white-space: nowrap; }
.nav a[aria-current="page"] { border-bottom-color: var(--qa); font-weight: 700; }
@media (max-width: 640px) {
  .nav { grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; }
  .nav a { padding: 0 6px; }
  .intro { padding-top: 14px; }
  h1 { font-size: 26px; }
  .lede { font-size: 17px; }
  .tool { margin-top: 12px; }
}
.crumbs { margin: 14px 0 0; font-size: 16px; color: var(--muted); }

.intro { padding: 20px 0 2px; max-width: 46rem; }
h1 { font: 700 clamp(28px, 5vw, 40px)/1.12 var(--head); margin: 0 0 8px; letter-spacing: -0.01em; }
.lede { margin: 0; color: var(--muted); font-size: 18px; }
h2 { font: 700 23px/1.25 var(--head); margin: 0 0 12px; }
h3 { font: 700 18px/1.3 var(--head); margin: 22px 0 6px; }

.tool { display: grid; gap: 18px; margin: 18px 0 10px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) {
  .tool { grid-template-columns: 330px minmax(0, 1fr); grid-template-areas: "in res" "opts res"; grid-template-rows: auto 1fr; align-items: start; column-gap: 28px; }
  .inputs { grid-area: in; }
  .opts { grid-area: opts; }
  .result { grid-area: res; }
}
.inputs, .opts { min-width: 0; }
.inputs { border-top: 4px solid var(--ink); padding-top: 14px; }
.result { min-width: 0; background: var(--surface); border-radius: var(--r); padding: 16px; box-shadow: 0 1px 0 var(--line), 0 0 0 1px var(--line); }

.field { display: flex; flex-direction: column; gap: 4px; margin: 0 0 14px; min-width: 0; }
.field > label { font-weight: 600; }
fieldset { border: 0; margin: 0 0 14px; padding: 0; min-width: 0; }
legend { font-weight: 600; padding: 0; margin-bottom: 4px; }
input[type=text], select { font: inherit; font-size: 17px; min-height: 44px; padding: 8px 10px; border: 1.5px solid var(--field); border-radius: var(--r); background: var(--surface); color: var(--ink); width: 100%; }
input[aria-invalid="true"] { border-color: var(--err); }
.suffix { display: flex; align-items: stretch; }
.suffix.narrow { max-width: 12rem; }
.suffix input { border-radius: var(--r) 0 0 var(--r); }
.suffix.narrow input:only-child { border-radius: var(--r); }
.suffix b { display: inline-flex; align-items: center; padding: 0 10px; border: 1.5px solid var(--field); border-left: 0; border-radius: 0 var(--r) var(--r) 0; font-weight: 600; background: var(--accent-soft); color: var(--ink); min-width: 44px; justify-content: center; }
.pair { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0 14px; }
.hint { margin: -6px 0 14px; color: var(--muted); display: flex; flex-wrap: wrap; align-items: center; column-gap: 8px; }
.hint .link-btn { padding: 0; min-height: 44px; }

.seg { display: flex; flex-wrap: wrap; }
.seg legend { width: 100%; }
.seg-opt { position: relative; }
.seg-opt input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.seg-opt span { display: inline-flex; align-items: center; min-height: 44px; padding: 6px 14px; border: 1.5px solid var(--field); margin-left: -1.5px; background: var(--surface); color: var(--ink); font-size: 16px; white-space: nowrap; cursor: pointer; }
.seg-opt:first-of-type span { border-radius: var(--r) 0 0 var(--r); margin-left: 0; }
.seg-opt:last-of-type span { border-radius: 0 var(--r) var(--r) 0; }
.seg-opt input:checked + span { background: var(--ink); border-color: var(--ink); color: var(--bg); position: relative; z-index: 1; font-weight: 600; }
.seg-opt input:focus-visible + span { outline: 3px solid var(--accent); outline-offset: 2px; z-index: 2; }
.more summary, .sizes-d summary, #earlier summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; font-weight: 600; color: var(--accent); }
.err { color: var(--err); margin: -6px 0 12px; font-weight: 600; overflow-wrap: anywhere; }

.answer { margin: 0 0 12px; font: 400 21px/1.3 var(--head); }
.answer b { font-weight: 700; }
.pics { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; align-items: stretch; margin: 0 0 14px; }
@media (max-width: 520px) { .pics { grid-template-columns: minmax(0, 1fr); } }
.pic.quilt { background-color: var(--mat); background-image: linear-gradient(var(--mat-line) 1px, transparent 1px), linear-gradient(90deg, var(--mat-line) 1px, transparent 1px); background-size: 16px 16px; border-radius: var(--r); padding: 14px; display: flex; align-items: center; justify-content: center; }
.quilt-svg { display: block; width: 100%; height: auto; max-height: 300px; }
.q-bg { fill: var(--qbg); stroke: var(--mat); stroke-width: 0.6; vector-effect: non-scaling-stroke; }
.q-a { fill: var(--qa); stroke: var(--mat); stroke-width: 0.6; vector-effect: non-scaling-stroke; }
.q-b { fill: var(--qb); stroke: var(--mat); stroke-width: 0.6; vector-effect: non-scaling-stroke; }
.q-c { fill: var(--qc); stroke: var(--mat); stroke-width: 0.6; vector-effect: non-scaling-stroke; }
.pic.pieces { display: flex; gap: 12px; align-items: flex-end; justify-content: center; color: var(--ink); }
.pic.pieces figure { margin: 0; flex: 1 1 0; min-width: 0; text-align: center; }
.piece-svg { display: block; width: 100%; height: auto; max-height: 220px; margin: 0 auto; }
.pic.pieces figcaption { font-size: 16px; color: var(--muted); margin-top: 4px; }
.cut-h { margin: 6px 0 6px; font-size: 18px; }
.cutlist { list-style: none; margin: 0; padding: 0; }
.cutlist li { padding: 8px 0; border-top: 1px solid var(--line); overflow-wrap: anywhere; }
.cutlist li:last-child { border-bottom: 1px solid var(--line); }
.c-name { font-weight: 700; margin-right: 4px; }
.c-amt { font-weight: 700; white-space: nowrap; }
.c-amt::before { content: "· "; font-weight: 400; color: var(--muted); }
.pages { margin: 10px 0 0; color: var(--muted); }
.note { margin: 12px 0 0; padding: 8px 12px; background: var(--accent-soft); border-radius: var(--r); overflow-wrap: anywhere; }
.res-wait { font-size: 18px; margin: 8px 0; overflow-wrap: anywhere; }

.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 16px 0 0; }
.btn { font: inherit; font-size: 17px; min-height: 44px; padding: 8px 18px; border: 1.5px solid var(--accent); border-radius: var(--r); background: var(--surface); color: var(--accent); font-weight: 600; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn.small { min-height: 44px; padding: 4px 12px; font-size: 16px; }
.link-btn { font: inherit; background: none; border: 0; color: var(--accent); text-decoration: underline; text-underline-offset: 2px; cursor: pointer; padding: 10px 6px; min-height: 44px; }

.sizes-d { margin: 6px 0 0; max-width: 46rem; }
#sizes-body h4 { margin: 14px 0 4px; font-size: 1rem; }
#sizes-body ol { margin: 0; padding-left: 1.4em; }
#sizes-body li { margin: 0 0 6px; overflow-wrap: anywhere; }
.saver { margin: 16px 0 0; }
.saver p { margin: 0 0 8px; }
.strip-svg { display: block; width: 100%; height: auto; max-height: 120px; }
.s-piece { fill: var(--qa); stroke: var(--ink); stroke-width: 1; vector-effect: non-scaling-stroke; }
.s-edge { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 6 4; vector-effect: non-scaling-stroke; }
.s-more { fill: var(--ink); }

.saved-sec { margin: 4px 0 0; }
.save-note { padding: 8px 12px; background: var(--accent-soft); border-radius: var(--r); }
#earlier-list { list-style: none; padding: 0; margin: 0 0 10px; }
#earlier-list li { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; padding: 6px 0; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
.reset-row { margin: 0; }
.reset-row .link-btn { padding-left: 0; }

.content { max-width: 46rem; margin: 26px 0 40px; }
.content section { margin: 0 0 30px; }
.content p { margin: 0 0 12px; }
.faq h3 { margin-top: 18px; }
.sources { color: var(--muted); }

.foot { border-top: 4px solid var(--ink); padding: 22px 0 30px; background: var(--surface); }
.sb-footer { font-size: 16px; color: var(--muted); }
.sb-more { margin: 0 0 10px; line-height: 1.7; }
.sb-privacy, .sb-credit { margin: 0 0 6px; }
.sb-footer a { color: var(--ink); }

#print-root { display: none; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

@page { margin: 10mm; }
@media print {
  body { background: #fff; color: #000; font: 11pt/1.4 Arial, Helvetica, sans-serif; }
  body > *:not(#print-root) { display: none !important; }
  #print-root { display: block; color: #000; }
  #print-root svg.sheet { display: block; break-after: page; page-break-after: always; overflow: hidden; }
  #print-root svg.sheet.short { break-after: auto; page-break-after: auto; margin-bottom: 2mm; }
  .pnotes { break-inside: avoid; font-size: 10.5pt; }
  .pnotes h2 { font: 700 13pt/1.25 Arial, sans-serif; margin: 0 0 2.5mm; }
  .pnotes table { border-collapse: collapse; width: 100%; margin: 0 0 2mm; }
  .pnotes th, .pnotes td { text-align: left; border-bottom: 0.3mm solid #999; padding: 1.2mm 3mm 1.2mm 0; vertical-align: top; }
  .pnotes ol { margin: 0 0 2mm; padding-left: 6mm; }
  .pnotes li { margin: 0 0 1.5mm; }
  .pnotes p { margin: 0 0 3mm; }
  .psaver { margin: 0 0 3mm; }
  .psaver p { margin: 0 0 2mm; }
  .psaver svg { display: block; }
  .pnotes .pnum { margin: 0 0 3mm; font-size: 10pt; }
  .pnotes.mid { break-after: page; page-break-after: always; }
  .print-msg { font: 13pt Arial, sans-serif; }
}