/* Biltmore Stick Maker: maple stick, black stamped type, forestry blue paint. */
:root {
  --bg: #f4f2ec;
  --panel: #ffffff;
  --ink: #1b1a17;
  --muted: #55524a;
  --line: #d6d1c3;
  --maple: #d9b66c;
  --maple-2: #c99f4f;
  --maple-ink: #2a1f0b;
  --accent: #1c5ea8;           /* tree-marking blue */
  --accent-ink: #ffffff;
  --err: #a8261b;
  --focus: #1c5ea8;
  --r: 6px;
  --slab: Rockwell, "Rockwell Nova", "Roboto Slab", "Zilla Slab", "DejaVu Serif", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17150f;
    --panel: #221f18;
    --ink: #efe9dc;
    --muted: #b8b09d;
    --line: #3d382c;
    --maple: #b8934b;
    --maple-2: #9c7a39;
    --maple-ink: #1a1408;
    --accent: #7fb2ec;
    --accent-ink: #0d1a2a;
    --err: #ff9a8a;
    --focus: #9cc5f5;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--sans); }
a { color: var(--accent); text-underline-offset: 2px; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 18px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--panel); padding: 8px 12px; z-index: 5; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

/* Header: the band is a stick with its scale along the bottom edge. */
.top { background: var(--maple); color: var(--maple-ink); position: relative; }
.top::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 9px;
  background:
    repeating-linear-gradient(90deg, var(--maple-ink) 0 1.5px, transparent 1.5px 48px) bottom left / 100% 9px no-repeat,
    repeating-linear-gradient(90deg, var(--maple-ink) 0 1px, transparent 1px 12px) bottom left / 100% 4px no-repeat;
  opacity: .8;
}
.top-in { display: flex; align-items: center; min-height: 58px; padding-bottom: 6px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; font: 700 19px/1.2 var(--slab); }

.intro { padding: 22px 0 6px; }
h1 { font: 700 clamp(26px, 5.4vw, 38px)/1.15 var(--slab); margin: 0 0 8px; letter-spacing: -.2px; }
.lede { margin: 0; color: var(--muted); max-width: 62ch; }
h2 { font: 700 23px/1.25 var(--slab); margin: 0 0 10px; }
h3 { font: 700 18px/1.3 var(--sans); margin: 18px 0 6px; }

/* Forms */
.basic { display: grid; grid-template-columns: minmax(0, 18rem) auto; gap: 6px 22px; align-items: start; margin: 14px 0 18px; }
.basic .measure { grid-column: 1 / -1; }
.field { margin: 0 0 10px; min-width: 0; }
.field label, legend { display: block; font-weight: 600; font-size: 15.5px; margin-bottom: 4px; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
input, select {
  font: inherit; font-size: 17px; color: var(--ink); background: var(--panel);
  border: 1.5px solid var(--line); border-radius: var(--r); min-height: 46px; padding: 8px 10px; width: 100%;
}
input:focus, select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent); }
input[aria-invalid="true"] { border-color: var(--err); }
.reach-field input { font: 700 24px/1 var(--sans); max-width: 9rem; }
.with-unit { display: flex; align-items: center; gap: 8px; }
.with-unit .unit { color: var(--muted); min-width: 1.6em; }
.hint { margin: 4px 0 0; color: var(--muted); font-size: 15px; }
.err { margin: 4px 0 0; color: var(--err); font-weight: 600; font-size: 15.5px; }
.seg { display: inline-flex; border: 1.5px solid var(--line); border-radius: var(--r); overflow: hidden; background: var(--panel); }
.seg-opt { position: relative; }
.seg-opt input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.seg-opt span { display: block; padding: 11px 14px; min-height: 46px; font-weight: 600; font-size: 15.5px; white-space: nowrap; }
.seg-opt + .seg-opt span { border-left: 1.5px solid var(--line); }
.seg-opt input:checked + span { background: var(--ink); color: var(--bg); }
.seg-opt input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: -3px; }
details > summary { cursor: pointer; font-weight: 600; color: var(--accent); min-height: 44px; display: flex; align-items: center; }
.measure { font-size: 16px; }
.measure ol { margin: 4px 0 8px; padding-left: 1.3em; }
.measure p { margin: 0 0 6px; }

/* Result */
.result { background: var(--panel); border: 1.5px solid var(--line); border-left: 6px solid var(--maple-2); border-radius: var(--r); padding: 16px 18px 18px; margin: 0 0 26px; }
.res-wait { color: var(--muted); }
.res-head { font: 700 22px/1.3 var(--slab); margin: 0 0 4px; }
.res-sub { margin: 0 0 12px; color: var(--muted); }
.res-note { margin: 0 0 6px; font-weight: 600; }
.check { margin: 0 0 14px; padding: 10px 12px; border: 1.5px dashed var(--line); border-radius: var(--r); }
.check b { font-variant-numeric: tabular-nums; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 0 0 4px; }
.btn { font: 600 16.5px/1.2 var(--sans); min-height: 46px; padding: 11px 18px; border-radius: var(--r); border: 1.5px solid var(--ink); background: var(--panel); color: var(--ink); cursor: pointer; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.print-tip { margin: 6px 0 14px; font-size: 15.5px; }
.linkish { font: inherit; color: var(--accent); background: none; border: 0; padding: 10px 0; min-height: 44px; text-decoration: underline; cursor: pointer; }
.faces { margin: 6px 0 0; }
.face { margin: 0 0 14px; }
.face h3 { font-size: 16px; margin: 0 0 6px; }
.pv { display: block; width: 100%; height: auto; }
.marks table { border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: 15.5px; margin: 8px 0; }
.marks th, .marks td { text-align: right; padding: 5px 12px 5px 0; border-bottom: 1px solid var(--line); }
.marks th:first-child, .marks td:first-child { text-align: left; }
.marks .cols { display: flex; flex-wrap: wrap; gap: 0 34px; }
.res-err { color: var(--err); font-weight: 600; margin: 0; }
.banner { background: color-mix(in srgb, var(--accent) 12%, var(--panel)); border: 1.5px solid var(--accent); border-radius: var(--r); padding: 10px 12px; margin: 0 0 14px; }
.banner p { margin: 0 0 6px; }

/* Scales form */
.scales { margin: 0 0 18px; }
.group { margin: 0 0 14px; }
.group > legend { font: 700 18px/1.3 var(--slab); margin-bottom: 8px; }
.row3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 14px; max-width: 30rem; }
.row2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 18px; max-width: 36rem; }
.more summary { font: 700 17px/1.3 var(--sans); }
#vol-group .field { max-width: 22rem; }
.keep { margin: 0 0 30px; font-size: 15.5px; color: var(--muted); }
.save-note { margin: 0; }
.earlier ul { list-style: none; padding: 0; margin: 4px 0; }
.earlier li { display: flex; flex-wrap: wrap; gap: 4px 12px; align-items: center; padding: 4px 0; border-bottom: 1px solid var(--line); }

/* Prose */
.prose { margin: 0 0 30px; max-width: 70ch; }
.prose p, .prose li { margin: 0 0 10px; }
.prose ol { padding-left: 1.3em; margin: 0 0 8px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details p { margin: 0 0 12px; }
.sources p { font-size: 15.5px; color: var(--muted); }

/* Footer */
.foot { border-top: 1.5px solid var(--line); padding: 20px 0 30px; font-size: 14.5px; color: var(--muted); }
.sb-footer p { margin: 0 0 10px; }
.sb-more a, .sb-credit a { color: var(--muted); }
.nf { padding: 40px 0 60px; }

@media (max-width: 560px) {
  body { font-size: 16.5px; }
  .basic { grid-template-columns: 1fr; gap: 0; }
  .result { padding: 14px 13px 16px; border-left-width: 5px; }
  .row2 { grid-template-columns: 1fr; }
  .row3 { gap: 0 10px; }
  .seg-opt span { padding: 11px 12px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }

#print-root { display: none; }
@page { margin: 10mm; }
@media print {
  body { background: #fff; color: #000; font: 10.5pt/1.4 Arial, Helvetica, sans-serif; }
  body > *:not(#print-root) { display: none !important; }
  #print-root { display: block; }
  .sheet { display: block; width: 188mm; height: 255mm; break-after: page; page-break-after: always; overflow: hidden; }
  .guide { color: #000; }
  .guide h2 { font: 700 15pt/1.2 Arial, sans-serif; margin: 0 0 2mm; }
  .guide h3 { font: 700 11.5pt/1.25 Arial, sans-serif; margin: 4mm 0 1mm; }
  .guide p, .guide li { margin: 0 0 1.4mm; }
  .guide ol { margin: 0 0 2mm; padding-left: 5mm; }
  .guide .gsum { margin-bottom: 3mm; }
  .guide .gcols { display: flex; gap: 8mm; align-items: flex-start; }
  .guide .gcols > div { flex: 1 1 0; min-width: 0; }
  .guide table { border-collapse: collapse; width: 43mm; font-size: 8.5pt; font-variant-numeric: tabular-nums; break-inside: avoid; }
  .guide th, .guide td { white-space: nowrap; border-bottom: 0.2mm solid #888; padding: 0.1mm 2mm 0.1mm 0; line-height: 1.25; text-align: right; }
  .guide th:first-child, .guide td:first-child { text-align: left; }
  .guide .tables { display: flex; flex-wrap: wrap; gap: 3mm 4mm; margin-top: 1mm; align-items: flex-start; }
  .guide .sub th { padding-top: 1.6mm; border-bottom: 0.3mm solid #000; }
  .guide .marks { break-inside: avoid; }
  .guide .marks-page { break-before: page; }
  .guide .marks-page table { font-size: 8.5pt; }
  .print-msg { font: 12pt Arial, sans-serif; }
}