/* Layout: an editorial worktable. White pattern sheet in the centre, quiet rails either side,
   Didone headings, chalk-blue seam lines, brick construction lines. */
:root{
  --paper:#efefec; --sheet:#ffffff; --panel:#f7f7f5; --ink:#111112; --muted:#6a6a70; --line:#dadad6; --hair:#e8e8e4;
  --accent:#2a3be0; --accent-ink:#ffffff; --accent-soft:#e8eafd; --cons:#b04a32; --fold:#2f7a50;
  --ok:#2f7a50; --warn:#a8700c; --bad:#c03a2b; --piece:rgba(42,59,224,.03);
  --grid1:#efefeb; --grid10:#dcdcd6;
  --f-display:'Bodoni Moda','Didot','Bodoni 72','Times New Roman',serif;
  --f-ui:'Instrument Sans','Helvetica Neue',Arial,sans-serif;
  --f-num:'IBM Plex Mono',ui-monospace,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0b0b0c; --sheet:#141416; --panel:#101012; --ink:#f1f0ec; --muted:#9a9aa0; --line:#2a2a2e; --hair:#1e1e22;
  --accent:#8e9bff; --accent-ink:#0b0b0c; --accent-soft:#1d2142; --cons:#e08a70; --fold:#6cc28f;
  --ok:#6cc28f; --warn:#e2b04a; --bad:#ef7464; --piece:rgba(142,155,255,.045); --grid1:#1a1a1d; --grid10:#28282c; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0b0b0c; --sheet:#141416; --panel:#101012; --ink:#f1f0ec; --muted:#9a9aa0; --line:#2a2a2e; --hair:#1e1e22;
  --accent:#8e9bff; --accent-ink:#0b0b0c; --accent-soft:#1d2142; --cons:#e08a70; --fold:#6cc28f;
  --ok:#6cc28f; --warn:#e2b04a; --bad:#ef7464; --piece:rgba(142,155,255,.045); --grid1:#1a1a1d; --grid10:#28282c; color-scheme:dark}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%;margin:0}
body{background:var(--paper);color:var(--ink);font:14px/1.45 var(--f-ui);display:flex;flex-direction:column}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* masthead */
.top{display:flex;align-items:flex-end;gap:28px;flex-wrap:wrap;padding:12px 20px 0;background:var(--sheet);border-bottom:1px solid var(--ink)}
.brand{display:flex;align-items:baseline;gap:12px;text-decoration:none;color:inherit;padding-bottom:12px}
.brand b{font:italic 500 30px/1 var(--f-display);letter-spacing:-.01em}
.brand small{font:500 10.5px/1 var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.tabs{display:flex;gap:0;flex-wrap:wrap;flex:1}
.tab{border:0;background:none;padding:6px 16px 11px;border-bottom:3px solid transparent;cursor:pointer;text-align:left;margin-bottom:-1px}
.tab span{display:block;font:500 12.5px/1.2 var(--f-ui);letter-spacing:.16em;text-transform:uppercase}
.tab em{display:block;font:italic 400 13px/1.3 var(--f-display);color:var(--muted);margin-top:2px}
.tab[aria-selected="true"]{border-bottom-color:var(--ink)}
.tab:hover span{color:var(--accent)}
.plan{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);padding-bottom:12px}
.plan select{padding:4px 6px;border:1px solid var(--line);background:var(--panel)}

.work{flex:1;min-height:0;display:grid;grid-template-columns:304px minmax(0,1fr) 304px}
.panel{background:var(--panel);overflow:auto;min-width:0}
.panel.left{border-right:1px solid var(--line)}
.panel.right{border-left:1px solid var(--line)}
.sec{padding:18px 18px 20px;border-bottom:1px solid var(--line)}
.sec h2{margin:0 0 12px;font:400 26px/1 var(--f-display);letter-spacing:-.01em;display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.sec h2 i{font:italic 400 14px var(--f-display);color:var(--muted)}
.grp{font:600 10.5px/1 var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin:16px 0 6px}
.row{display:grid;grid-template-columns:minmax(0,1fr) 80px;align-items:center;gap:8px;padding:2px 0}
.row label{font-size:13.5px;min-width:0}
.row.unused label{color:var(--muted)}
.fld{position:relative}
.fld input{width:100%;padding:5px 28px 5px 6px;text-align:right;font:500 13px var(--f-num);font-variant-numeric:tabular-nums;border:0;border-bottom:1px solid var(--line);background:transparent;border-radius:0}
.fld input:hover{border-bottom-color:var(--muted)}
.fld input:focus{border-bottom-color:var(--accent);outline:none;background:var(--accent-soft)}
.fld input.err{border-bottom-color:var(--bad);color:var(--bad)}
.fld::after{content:attr(data-u);position:absolute;right:4px;top:50%;transform:translateY(-50%);font:11px var(--f-num);color:var(--muted);pointer-events:none}
.row.chk input{justify-self:end;width:16px;height:16px;accent-color:var(--accent)}
.inline{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.inline select,.inline input[type=text]{padding:6px 7px;border:1px solid var(--line);background:var(--sheet);min-width:0}
.inline input[type=text]{flex:1}
.inline .fld input{padding:6px 28px 6px 6px;border:1px solid var(--line);background:var(--sheet)}
.btn{padding:6px 11px;border:1px solid var(--ink);background:var(--sheet);cursor:pointer;font:500 13px var(--f-ui);border-radius:0}
.btn:hover{background:var(--ink);color:var(--sheet)}
.btn.pri{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.pri:hover{filter:brightness(1.1);background:var(--accent);color:var(--accent-ink)}
.btn.sm{font-size:12px;padding:3px 9px}
.hint{font-size:12.5px;color:var(--muted);margin:10px 0 0;line-height:1.5}

.stage{display:flex;flex-direction:column;min-width:0;min-height:0}
.toolbar{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:9px 14px;border-bottom:1px solid var(--line);background:var(--sheet)}
.toolbar .sep{width:1px;height:20px;background:var(--line);margin:0 6px}
.tog{display:flex;align-items:center;gap:6px;font-size:13px;padding:3px 6px;cursor:pointer;user-select:none}
.tog input{accent-color:var(--accent)}
.ibtn{width:30px;height:29px;border:1px solid var(--line);background:var(--sheet);cursor:pointer;font:500 15px var(--f-num)}
.ibtn:hover{border-color:var(--ink)}
.canvas-wrap{flex:1;min-height:0;position:relative;overflow:hidden;touch-action:none}
#cv{width:100%;height:100%;display:block;cursor:grab}
#cv.drag{cursor:grabbing}
.status{display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between;padding:7px 14px;border-top:1px solid var(--line);background:var(--sheet);font:12px var(--f-num);color:var(--muted)}
.legend{display:flex;gap:14px;flex-wrap:wrap}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{display:inline-block;width:18px;border-top:2px solid var(--ink)}
.legend i.s{border-top:2px dashed var(--accent)}
.legend i.c{border-top:1px dashed var(--cons)}

/* drawing */
.L-CUT{stroke:var(--ink);stroke-width:1.5px;fill:var(--piece);vector-effect:non-scaling-stroke;stroke-linejoin:round}
.L-SEW{stroke:var(--accent);stroke-width:1px;stroke-dasharray:5 3;fill:none;vector-effect:non-scaling-stroke}
.L-FOLD{stroke:var(--fold);stroke-width:1.2px;fill:none;vector-effect:non-scaling-stroke}
.L-NOTCH,.L-GRAIN{stroke:var(--ink);stroke-width:1.3px;fill:none;vector-effect:non-scaling-stroke}
.L-MARK{stroke:var(--cons);stroke-width:1.2px;fill:none;vector-effect:non-scaling-stroke}
.L-MARK.k-foldline{stroke:var(--fold);stroke-dasharray:8 3 2 3}
.L-CONS{stroke:var(--cons);stroke-width:.8px;stroke-dasharray:6 4;fill:none;vector-effect:non-scaling-stroke;opacity:.8}
.L-HIT{stroke:transparent;stroke-width:12px;fill:none;vector-effect:non-scaling-stroke;pointer-events:stroke;cursor:help}
.L-HIT:hover{stroke:var(--accent);stroke-opacity:.3}
.L-TEXT{fill:var(--ink);font-family:var(--f-ui);letter-spacing:.06em;pointer-events:none}
.L-POINT{fill:var(--cons)}
.L-PLBL{fill:var(--cons);font:500 .8px var(--f-num);pointer-events:none}
.sheet{fill:var(--sheet)}
.gr{fill:none!important;stroke-width:1px}
.L-CUT.base-g{stroke-width:1.9px}

/* right rail */
.checks{width:100%;border-collapse:collapse;font-size:13.5px}
.checks td{padding:7px 0;border-bottom:1px solid var(--hair);vertical-align:top}
.checks td.v{text-align:right;font:500 13px var(--f-num);font-variant-numeric:tabular-nums;white-space:nowrap;padding-left:8px}
.checks small{display:block;color:var(--muted);font-size:12px}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:7px;vertical-align:1px;background:var(--line)}
.dot.ok{background:var(--ok)}.dot.warn{background:var(--warn)}.dot.bad{background:var(--bad)}
.pieces{list-style:none;margin:0;padding:0;font-size:13.5px}
.pieces li{display:flex;justify-content:space-between;gap:8px;padding:6px 0;border-bottom:1px solid var(--hair)}
.pieces li span:last-child{font:12px var(--f-num);color:var(--muted);white-space:nowrap}
.exp{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.exp .btn{text-align:left;padding:10px 11px;position:relative;border:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--sheet)}
.exp .btn b{display:block;font:500 13.5px var(--f-ui)}
.exp .btn small{display:block;color:var(--muted);font:italic 400 13px var(--f-display)}
.exp .btn:hover small{color:inherit}
.badge{position:absolute;top:8px;right:8px;font:600 9.5px/1 var(--f-ui);letter-spacing:.14em;padding:3px 5px;background:var(--accent);color:var(--accent-ink)}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--sheet);padding:10px 16px;font-size:13px;max-width:calc(100% - 32px);z-index:20}
.modal{position:fixed;inset:0;background:rgba(10,10,12,.5);display:grid;place-items:center;padding:16px;z-index:30}
.modal .box{background:var(--sheet);border:1px solid var(--ink);padding:26px;max-width:400px;width:100%}
.modal h3{margin:0 0 10px;font:400 30px/1.05 var(--f-display);letter-spacing:-.01em}
.modal p{margin:0 0 18px;color:var(--muted)}

/* grading */
.seg{display:inline-flex;border:1px solid var(--ink)}
.seg button{border:0;background:var(--sheet);padding:6px 14px;cursor:pointer;font:500 11.5px/1 var(--f-ui);letter-spacing:.18em;text-transform:uppercase}
.seg button+button{border-left:1px solid var(--ink)}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--sheet)}
.chips{display:flex;flex-wrap:wrap;gap:5px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--line);border-radius:999px;background:var(--sheet);cursor:pointer;font:500 13px var(--f-num)}
.chip i{width:9px;height:9px;border-radius:50%;background:var(--c)}
.chip[aria-pressed="false"]{opacity:.45}
.chip[aria-pressed="false"] i{background:transparent;border:1px solid var(--c)}
.chip.base{border-color:var(--ink)}
.banner{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:8px 14px;background:var(--accent-soft);border-bottom:1px solid var(--line);font-size:13px}
.gtable-wrap{max-height:34%;overflow:auto;border-top:1px solid var(--ink);background:var(--sheet)}
.gtable{border-collapse:collapse;font-size:12.5px;min-width:100%}
.gtable th,.gtable td{padding:6px 12px;border-bottom:1px solid var(--hair);white-space:nowrap;text-align:right;font-variant-numeric:tabular-nums}
.gtable th:first-child,.gtable td:first-child{text-align:left;position:sticky;left:0;background:var(--sheet);font-family:var(--f-ui)}
.gtable td{font-family:var(--f-num)}
.gtable thead th{position:sticky;top:0;background:var(--sheet);z-index:1;font:500 13px var(--f-num)}
.gtable thead th:first-child{z-index:2;font:italic 400 15px var(--f-display)}
.gtable th .sw{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:5px;vertical-align:0}
.gtable .b{background:var(--accent-soft)}
.gtable tr.grp td{font:600 10.5px var(--f-ui);letter-spacing:.2em;text-transform:uppercase;color:var(--muted);background:var(--panel)}
.gtable .open{margin-left:7px;border:1px solid var(--line);background:var(--sheet);font:500 11px var(--f-ui);padding:1px 7px;cursor:pointer}
.gtable .open:hover{border-color:var(--ink)}

@media (max-width:1080px){
  .work{grid-template-columns:minmax(0,1fr);grid-auto-rows:auto;overflow:auto}
  .stage{order:-1;height:64vh;min-height:380px}
  .panel{overflow:visible;border:0!important;border-top:1px solid var(--line)!important}
  body{height:auto;min-height:100%}
  html{height:auto}
  .tabs{flex:1 1 100%;order:3;flex-wrap:nowrap;overflow-x:auto;margin:0 -20px;padding:0 20px}
  .tab{flex:none}
  .tab em{display:none}
  .plan{margin-left:auto}
  .brand small{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* 3D fit */
.view3d{flex:1;min-height:0;position:relative;overflow:hidden;background:var(--sheet);touch-action:none}
.view3d canvas{display:block;cursor:grab}
.view3d canvas:active{cursor:grabbing}
.v3-msg{position:absolute;left:14px;top:12px;font:12px var(--f-num);color:var(--muted);pointer-events:none}
.seg-sm button{padding:6px 11px;font-size:11px}
.swatches{display:flex;gap:7px;flex-wrap:wrap}
.swatch{width:26px;height:26px;border-radius:50%;border:1px solid var(--line);cursor:pointer;background:var(--c)}
.swatch[aria-pressed="true"]{outline:2px solid var(--ink);outline-offset:2px}
.legend3d{margin-top:12px;font-size:12px;color:var(--muted)}
.legend3d .bar{height:8px;border-radius:2px;margin-bottom:4px}
.legend3d .lbl{display:flex;justify-content:space-between;font:11px var(--f-num)}
.legend3d .keys{display:flex;flex-direction:column;gap:5px}
.legend3d .keys span{display:flex;align-items:center;gap:8px}
.legend3d .keys i{width:12px;height:12px;border-radius:2px;background:var(--c)}