/* Cut List Optimizer. Tokens follow S-010; brand layer: olive accent, system fonts, 8px radius. */
:root {
  color-scheme: light dark;
  --paper: #F7F7F5; --surface: #FFFFFF; --ink: #0A0A0A; --ink-2: #44443F; --mute: #6B6B66; --line: #E3E3DF;
  --accent: #4A5A1C; --accent-ink: #FFFFFF; --accent-soft: #E9EEDB;
  --warn: #B45309; --warn-soft: #FEF3E2;
  --radius: 8px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #121211; --surface: #1A1A19; --ink: #ECECE8; --ink-2: #C2C2BC; --mute: #9A9A93; --line: #2C2C2A;
    --accent: #A9BF6F; --accent-ink: #121211; --accent-soft: #2A3016;
    --warn: #F0A24C; --warn-soft: #3A2A14;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.6 var(--font); font-variant-numeric: tabular-nums; overflow-wrap: break-word; }
img, svg { max-width: 100%; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 8px; top: -60px; background: var(--surface); padding: 10px 14px; border: 1px solid var(--line); border-radius: var(--radius); z-index: 10; }
.skip:focus { top: 8px; }
.wrap { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .wrap { padding: 0 32px; } }

/* header, footer */
.site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0 24px; }
.brand { display: inline-flex; align-items: center; min-height: 44px; font-weight: 600; font-size: 16px; color: var(--ink); text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 20px; }
.site-nav a { display: inline-flex; align-items: center; min-height: 44px; font-size: 14px; color: var(--ink-2); text-decoration: none; }
.site-nav a:hover { color: var(--accent); text-decoration: underline; }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.site-footer { margin-top: 64px; border-top: 1px solid var(--line); padding: 24px 0 40px; font-size: 14px; color: var(--mute); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 4px 24px; align-items: center; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; color: var(--ink-2); }

/* hero */
.hero { padding: 32px 0 24px; }
.crumbs { font-size: 12px; line-height: 1.5; color: var(--mute); margin: 0 0 12px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 8px; margin: 0; padding: 0; }
.crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--mute); }
.crumbs a { color: var(--mute); }
h1 { font-size: clamp(26px, 5vw, 36px); line-height: 1.2; font-weight: 600; margin: 0 0 12px; letter-spacing: -0.01em; }
.lede { font-size: 18px; line-height: 1.5; color: var(--ink-2); margin: 0; max-width: 62ch; }

/* tool: one column below 900px; from 900px a 12-column grid, form 5 columns, results 7 columns, gap 24px, nothing sticky */
.tool { padding-bottom: 8px; }
@media (min-width: 900px) {
  .tool { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 24px; align-items: start; }
  .tool-l { grid-column: 1 / span 5; min-width: 0; }
  .tool-r { grid-column: 6 / span 7; min-width: 0; }
}
.grp { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.grp-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; margin-bottom: 12px; }
.grp-title { font-size: 20px; line-height: 1.3; font-weight: 600; margin: 0; }
.meta { font-size: 12px; line-height: 1.5; color: var(--mute); }
.hint { font-size: 14px; line-height: 1.5; color: var(--mute); margin: 12px 0 0; }
.empty { font-size: 14px; color: var(--mute); margin: 12px 0 0; }
.fields { display: grid; gap: 12px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 560px) { .fields.f3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } .fields.f2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.fields label, .c-name, .c-len, .c-wid, .c-qty { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--ink-2); min-width: 0; }
input[type="text"] { width: 100%; min-width: 0; min-height: 44px; font: 400 16px/1.4 var(--font); color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 12px; font-variant-numeric: tabular-nums; }
input[type="text"]::placeholder { color: var(--mute); opacity: 1; }
input[type="text"]:hover { border-color: var(--mute); }
input[aria-invalid="true"] { border-color: var(--warn); box-shadow: inset 0 0 0 1px var(--warn); }
.ferr { display: block; margin-top: 4px; color: var(--warn); font-size: 12px; line-height: 1.5; font-weight: 400; }
.example-note { margin: 0 0 12px; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.seg button { min-height: 44px; padding: 0 14px; font: 500 14px/1 var(--font); color: var(--ink); background: var(--surface); border: 0; cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }
.seg button:focus-visible { outline-offset: -2px; }

/* parts table: table row when the parts box is wide enough, stacked cells otherwise */
.parts { container: parts / inline-size; }
.parts-sum { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; font-size: 14px; color: var(--ink-2); }
@media (min-width: 900px) { .parts-sum { display: none; } }
@media (max-width: 899.98px) { .grp.collapsed .parts-body { display: none; } }
.phead { display: none; }
.prow { display: grid; gap: 8px 12px; padding: 12px 0; border-top: 1px solid var(--line); grid-template-columns: repeat(3, minmax(0, 1fr)) 44px; align-items: end; }
.parts .prow:has(.ferr) { align-items: start; }
.prow:first-of-type { border-top: 0; }
.m1 .prow { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr) 44px; }
.c-name { grid-column: 1 / -1; }
.m2 .c-len { grid-column: 1 / 2; } .m2 .c-wid { grid-column: 2 / 3; } .m2 .c-qty { grid-column: 3 / 5; }
.m1 .c-len { grid-column: 1 / 3; } .m1 .c-qty { grid-column: 3 / 4; } .m1 .c-del { grid-column: 4 / 5; }
.m2 .c-rot { grid-column: 1 / 4; } .m2 .c-del { grid-column: 4 / 5; }
.sw { display: inline-flex; flex-direction: row; align-items: center; gap: 10px; min-height: 44px; font-size: 14px; color: var(--ink-2); cursor: pointer; }
.sw input { width: 22px; height: 22px; margin: 0; accent-color: var(--accent); flex: none; }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0; color: var(--mute); background: transparent; border: 1px solid transparent; border-radius: var(--radius); cursor: pointer; }
.icon-btn:hover { color: var(--ink); border-color: var(--line); }
@container parts (min-width: 448px) {
  .phead { display: grid; gap: 8px; font-size: 12px; font-weight: 500; color: var(--mute); padding-bottom: 8px; }
  .m2 .phead { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) 56px 72px 44px; }
  .m1 .phead { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) 80px 44px; }
  .m2 .prow { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) 56px 72px 44px; gap: 8px; align-items: center; padding: 8px 0; }
  .m1 .prow { grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) 80px 44px; gap: 8px; align-items: center; padding: 8px 0; }
  .m2 .c-name, .m2 .c-len, .m2 .c-wid, .m2 .c-qty, .m2 .c-rot, .m2 .c-del,
  .m1 .c-name, .m1 .c-len, .m1 .c-qty, .m1 .c-del { grid-column: auto; }
  .prow input[type="text"] { padding: 8px; }
  .cl, .c-rot span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
}

/* buttons: primary (one per block), secondary (outline), text */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 16px; font: 500 14px/1 var(--font); color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); cursor: pointer; text-decoration: none; }
.btn:hover { border-color: var(--mute); }
.btn.primary { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); font-size: 16px; font-weight: 600; padding: 0 28px; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.link { color: var(--accent); background: transparent; border-color: transparent; padding: 0 8px; }
.btn.link:hover { text-decoration: underline; border-color: transparent; }
.row-actions { margin-top: 8px; }
.calc-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin: 0 0 16px; }
@media (max-width: 559px) { .calc-row .primary { width: 100%; } }

.notice { margin: 12px 0 0; padding: 12px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); font-size: 14px; line-height: 1.5; }
.notice ul { margin: 6px 0 0; padding-left: 20px; }
.notice.warn { background: var(--warn-soft); border-color: var(--warn); color: var(--ink); }
.notice.warn strong { color: var(--warn); }
#err { margin: 0 0 16px; }

/* saved */
.saved { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.save-row { display: flex; flex-wrap: wrap; gap: 8px; }
.save-row input { flex: 1 1 200px; width: auto; }
.plist { list-style: none; margin: 12px 0 0; padding: 0; }
.plist li { display: flex; flex-wrap: wrap; align-items: center; gap: 0 12px; padding: 4px 0; border-top: 1px solid var(--line); }
.plist .pn-name { flex: 1 1 140px; min-width: 0; font-weight: 600; font-size: 14px; }

/* results */
.results { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; scroll-margin-top: 12px; container: results / inline-size; }
.results:focus { outline: none; }
.res-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 16px; margin-bottom: 16px; }
.res-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.stats { display: grid; gap: 16px 24px; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0; padding: 0 0 4px; }
@container results (min-width: 560px) { .stats { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.stat dt { font-size: 12px; line-height: 1.5; font-weight: 500; color: var(--mute); }
.stat dd { margin: 0; font-size: 20px; line-height: 1.3; font-weight: 300; }
.stat dd.big { font-size: 28px; line-height: 1.2; }
.board { border-top: 1px solid var(--line); margin-top: 24px; padding-top: 16px; }
.board h3, .results h3 { font-size: 16px; line-height: 1.4; font-weight: 600; margin: 0 0 12px; }
.board h3 .meta { font-weight: 400; margin-left: 8px; }
.board h4 { font-size: 14px; line-height: 1.4; font-weight: 600; margin: 16px 0 6px; }
.diagram { display: block; width: 100%; height: auto; }
.board-bg { fill: var(--paper); stroke: var(--ink); stroke-width: 1; }
.hatch { stroke: var(--mute); opacity: 0.35; }
.piece { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1; }
.pn { fill: var(--ink); font-weight: 600; font-family: var(--font); }
.pd { fill: var(--ink-2); font-family: var(--font); }
.grain line, .grain path { stroke: var(--mute); stroke-width: 1.5; }
.grain text { fill: var(--mute); font-family: var(--font); }
.steps { margin: 0; padding-left: 24px; font-size: 14px; }
.steps li { padding: 2px 0; }
.legend { list-style: none; margin: 0; padding: 0; display: grid; gap: 0 24px; font-size: 14px; }
@media (min-width: 768px) { .legend { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.legend li { display: flex; gap: 12px; padding: 4px 0; border-top: 1px solid var(--line); min-width: 0; }
.legend b { flex: none; min-width: 2.5ch; }
.legend span { min-width: 0; }
.results > h3 { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); }
.print-only { display: none; }

/* pricing card (fake door) */
.pro { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 16px; }
.pro p { margin: 8px 0; font-size: 14px; color: var(--ink-2); }
.pro ul { margin: 0 0 12px; padding-left: 20px; font-size: 14px; color: var(--ink-2); }
.paid-offer__btn { max-width: 100%; text-align: left; line-height: 1.3; padding-top: 8px; padding-bottom: 8px; }
.paid-offer__soon { color: var(--mute); font-weight: 400; }
.paid-offer__panel { margin-top: 8px; padding: 12px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
.paid-offer__panel p { margin: 0; }
[hidden] { display: none !important; }

/* save-limit dialog: the only element with a shadow */
.dlg { width: min(440px, calc(100% - 32px)); padding: 24px; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2); }
.dlg::backdrop { background: rgba(10, 10, 10, 0.45); }
.dlg p { margin: 0 0 16px; font-size: 16px; line-height: 1.5; }
.dlg-actions { display: flex; flex-wrap: wrap; gap: 8px; }
@media (max-width: 559px) { .dlg-actions .btn { flex: 1 1 100%; } }

/* long-form content */
.content { padding-top: 24px; max-width: 680px; margin: 0 auto; }
.content section { border-top: 1px solid var(--line); padding-top: 40px; margin-top: 40px; }
.content section:first-child { margin-top: 24px; }
.content h2 { font-size: 20px; line-height: 1.3; font-weight: 600; margin: 0 0 12px; }
.content h3 { font-size: 16px; line-height: 1.4; font-weight: 600; margin: 24px 0 6px; }
.content p, .content li { color: var(--ink-2); }
.content p { margin: 0 0 12px; }
.content ol, .content ul { padding-left: 24px; margin: 0 0 12px; }
.content li { margin-bottom: 6px; }
.content code { font: 400 14px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--accent-soft); padding: 1px 5px; border-radius: 4px; color: var(--ink); }
.content table { width: 100%; border-collapse: collapse; font-size: 14px; display: block; overflow-x: auto; }
.content th, .content td { text-align: left; padding: 8px 12px; border-top: 1px solid var(--line); vertical-align: top; }
.content details { border-top: 1px solid var(--line); padding: 4px 0; }
.content summary { min-height: 44px; display: flex; align-items: center; cursor: pointer; font-weight: 600; color: var(--ink); }
.content details p { margin: 0 0 12px; }

/* legal and 404 */
.page { padding: 32px 0 0; max-width: 760px; }
.page h1 { margin-bottom: 16px; }
.page h2 { font-size: 20px; line-height: 1.3; font-weight: 600; margin: 32px 0 8px; }
.page p, .page li { color: var(--ink-2); }
.page code { font: 400 14px/1.5 ui-monospace, Menlo, Consolas, monospace; background: var(--accent-soft); padding: 1px 5px; border-radius: 4px; color: var(--ink); }
main.wrap > h1 { padding-top: 32px; }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }

/* print: results only, light colours */
@media print {
  :root { --paper: #fff; --surface: #fff; --ink: #000; --ink-2: #222; --mute: #444; --line: #bbb; --accent: #2f3a18; --accent-soft: #eef1e4; }
  body { background: #fff; font-size: 11pt; }
  .site-header, .site-footer, .hero, .content, .tool-form, .saved, .pro, .res-actions, .skip, #err, noscript, .dlg { display: none !important; }
  .wrap { max-width: none; padding: 0; }
  .tool { display: block; }
  .results { border: 0; padding: 0; margin: 0; }
  .results > .empty { display: none; }
  .print-only { display: block; }
  .print-meta { margin: 0 0 12px; font-size: 11pt; }
  .print-foot { margin-top: 16px; font-size: 10pt; color: #444; }
  .example-note { display: none; }
  .board { break-inside: avoid; page-break-inside: avoid; }
  .hatch { opacity: 0.5; }
  .stat dd.big { font-size: 22pt; }
}

.results.stale { opacity: .45; }