:root{
  --ink:#1b1d1f;--ink-2:#2a2d30;--steel:#3d4248;--line:#d8d4cc;
  --paper:#faf8f4;--card:#ffffff;--muted:#74706a;
  --amber:#e8a317;--amber-dk:#b97e0a;--cut:#c0492a;--good:#3a6b3d;
  --use:#c79a5f;--use-dk:#a87f48;--radius:14px;
  --shadow:0 1px 2px rgba(27,29,31,.06),0 8px 24px rgba(27,29,31,.06);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html{-webkit-text-size-adjust:100%;}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased;
  padding-bottom:calc(36px + env(safe-area-inset-bottom));}
.wrap{max-width:600px;margin:0 auto;padding:0 18px;}
.top{background:var(--ink);color:var(--paper);padding:calc(22px + env(safe-area-inset-top)) 0 22px;}
.top .wrap{display:flex;align-items:center;gap:12px;}
.logo{width:40px;height:40px;min-width:40px;max-width:40px;border-radius:10px;flex:0 0 40px;
  background:linear-gradient(145deg,var(--amber),var(--amber-dk));
  display:flex;align-items:center;justify-content:center;box-shadow:inset 0 1px 0 rgba(255,255,255,.3);}
.logo svg{width:22px;height:22px;display:block;}
.top h1{font-size:18px;font-weight:700;margin:0;letter-spacing:-.01em;display:flex;align-items:center;gap:7px;white-space:nowrap;}
.top p{margin:1px 0 0;font-size:12.5px;color:#a7a39c;}
.top .titlewrap{flex:1;min-width:0;}
.beta{font-size:9.5px;font-weight:800;letter-spacing:.1em;background:var(--amber);color:#3a2a05;
  padding:3px 6px;border-radius:5px;line-height:1;vertical-align:middle;}
.ver{flex:0 0 auto;font-size:11px;font-weight:600;color:#a7a39c;font-variant-numeric:tabular-nums;
  border:1px solid #3a3d40;border-radius:6px;padding:3px 7px;align-self:flex-start;}
.tabbar{position:sticky;top:0;z-index:20;background:var(--paper);border-bottom:1px solid var(--line);}
.tabbar .wrap{display:flex;gap:4px;padding-top:6px;padding-bottom:6px;}
.tab{flex:1;border:none;background:transparent;cursor:pointer;padding:11px 4px;border-radius:9px;
  font-size:13.5px;font-weight:600;color:var(--muted);transition:background .15s,color .15s;}
.tab.active{background:var(--ink);color:var(--paper);}
section{display:none;padding-top:22px;}
section.active{display:block;animation:fade .25s ease;}
@keyframes fade{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:none;}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;margin-bottom:16px;box-shadow:var(--shadow);}
.card h2{font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin:0 0 14px;}
.card h2 .pill{float:right;font-size:10px;background:#f0ece4;color:var(--steel);padding:2px 7px;border-radius:20px;letter-spacing:.04em;font-weight:700;}
label{display:block;font-size:12.5px;font-weight:600;color:var(--steel);margin:0 0 6px;}
input,select{width:100%;padding:13px 14px;font-size:16px;color:var(--ink);
  border:1.5px solid var(--line);border-radius:11px;background:#fff;font-family:inherit;
  appearance:none;-webkit-appearance:none;transition:border-color .15s,box-shadow .15s;}
select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2374706a' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:38px;}
input:focus,select:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px rgba(232,163,23,.18);}
input[inputmode]{font-variant-numeric:tabular-nums;}
.field{margin-bottom:15px;}.field:last-child{margin-bottom:0;}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.hint{font-size:12.5px;color:var(--muted);margin:8px 2px 0;line-height:1.45;}
.btn{width:100%;cursor:pointer;border:none;border-radius:12px;padding:15px;font-size:15.5px;
  font-weight:700;font-family:inherit;transition:transform .06s,filter .15s;}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--ink);color:var(--paper);box-shadow:var(--shadow);}
.btn-primary:active{filter:brightness(1.15);}
.btn-amber{background:linear-gradient(145deg,var(--amber),var(--amber-dk));color:#3a2a05;}
.btn-ghost{background:transparent;color:var(--steel);border:1.5px solid var(--line);}
.btn-sm{padding:11px;font-size:13.5px;}
.btn-row{display:flex;gap:10px;margin-top:12px;}.btn-row .btn{margin:0;}
/* toggle row */
.toggle{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 0 0;}
.toggle .tl{font-size:13.5px;font-weight:600;color:var(--steel);}
.toggle .tl small{display:block;font-size:11.5px;font-weight:400;color:var(--muted);margin-top:2px;}
.switch{position:relative;width:48px;height:28px;flex:0 0 48px;}
.switch input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer;z-index:2;}
.slider{position:absolute;inset:0;background:#d8d4cc;border-radius:20px;transition:background .18s;}
.slider:before{content:"";position:absolute;width:22px;height:22px;left:3px;top:3px;background:#fff;
  border-radius:50%;transition:transform .18s;box-shadow:0 1px 2px rgba(0,0,0,.2);}
.switch input:checked + .slider{background:var(--good);}
.switch input:checked + .slider:before{transform:translateX(20px);}
.piece{display:flex;align-items:center;gap:12px;padding:13px 14px;background:#fff;
  border:1px solid var(--line);border-radius:12px;margin-bottom:9px;}
.piece .tag{background:var(--ink);color:var(--paper);font-size:13px;font-weight:700;padding:5px 9px;
  border-radius:8px;font-variant-numeric:tabular-nums;min-width:40px;text-align:center;}
.piece .meta{flex:1;line-height:1.25;min-width:0;}
.piece .meta .len{font-size:16px;font-weight:700;font-variant-numeric:tabular-nums;}
.piece .meta .lab{font-size:11.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.piece .del{flex:0 0 auto;width:34px;height:34px;border-radius:9px;border:none;cursor:pointer;
  background:#f5f2ec;color:var(--cut);font-size:18px;line-height:1;display:flex;align-items:center;justify-content:center;}
.piece .del:active{background:#ece7dd;}
.pbtn{flex:0 0 auto;border:1px solid var(--line);background:#fff;color:var(--steel);
  font-size:12px;font-weight:700;padding:8px 11px;border-radius:8px;cursor:pointer;}
.pbtn:active{background:#f2efe9;}
.proj .meta{min-width:0;}
.proj .meta .len{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.empty{text-align:center;color:var(--muted);font-size:13.5px;padding:22px 14px;
  border:1.5px dashed var(--line);border-radius:12px;}
.grouphdr{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--steel);
  margin:18px 0 10px;display:flex;align-items:center;gap:8px;}
.grouphdr::before{content:"";width:10px;height:10px;border-radius:3px;background:var(--use);}
.buyline{background:linear-gradient(145deg,var(--amber),var(--amber-dk));color:#3a2a05;
  border-radius:var(--radius);padding:18px;margin-bottom:18px;box-shadow:var(--shadow);}
.buyline .num{font-size:27px;font-weight:800;line-height:1.05;letter-spacing:-.01em;}
.buyline .num small{font-size:16px;font-weight:700;}
.buyline .sub{font-size:13px;margin-top:6px;opacity:.85;}
.buyrow{display:flex;justify-content:space-between;align-items:baseline;padding:6px 0;border-bottom:1px dashed rgba(58,42,5,.25);font-size:15px;}
.buyrow:last-child{border-bottom:none;}
.buyrow b{font-weight:800;}
.board{margin-bottom:15px;}
.board .bhead{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:7px;}
.board .bhead .name{font-size:13.5px;font-weight:700;}
.board .bhead .scrap{font-size:12px;color:var(--cut);font-weight:600;font-variant-numeric:tabular-nums;}
.bar{display:flex;height:38px;border-radius:9px;overflow:hidden;border:1px solid var(--line);background:#f0ece4;}
.seg{display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff;
  min-width:0;overflow:hidden;white-space:nowrap;border-right:1.5px solid rgba(255,255,255,.55);font-variant-numeric:tabular-nums;}
.seg:last-child{border-right:none;}
.seg.use{background:linear-gradient(180deg,var(--use),var(--use-dk));text-shadow:0 1px 1px rgba(0,0,0,.18);}
.seg.scrap{background:repeating-linear-gradient(45deg,#e6dfd2,#e6dfd2 6px,#d8cfbd 6px,#d8cfbd 12px);color:var(--steel);}
.seg.trim{background:repeating-linear-gradient(45deg,#e7c3b6,#e7c3b6 5px,#dcae9e 5px,#dcae9e 10px);color:var(--cut);}
.seg.nocut{background:repeating-linear-gradient(45deg,#cfcdc8,#cfcdc8 5px,#bdbab4 5px,#bdbab4 10px);color:#2a2d30;}
.cutlist{margin-top:14px;border-top:1px solid var(--line);padding-top:14px;}
.cutlist h3{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 8px;}
.cutrow{font-size:13.5px;font-variant-numeric:tabular-nums;padding:3px 0;color:var(--ink-2);}
.cutrow b{color:var(--ink);}
.totals{font-size:12.5px;color:var(--muted);margin-top:14px;border-top:1px solid var(--line);padding-top:12px;line-height:1.7;}
.totals b{color:var(--ink-2);}
.warn{background:#fcefe9;border:1px solid #e6b9a8;color:var(--cut);border-radius:12px;
  padding:14px;font-size:13.5px;font-weight:600;}
.calcout{background:#fff;border:1px solid var(--line);border-top:4px solid var(--amber);
  border-radius:var(--radius);padding:20px 18px;text-align:center;margin-bottom:16px;box-shadow:var(--shadow);}
.calcout .frac{font-size:30px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.01em;line-height:1.1;color:var(--ink);}
.calcout .dec{font-size:14px;color:var(--muted);margin-top:5px;font-variant-numeric:tabular-nums;}
.calcrow{display:flex;align-items:center;gap:8px;margin-bottom:14px;}
.calcrow input{text-align:center;font-size:18px;font-weight:700;font-variant-numeric:tabular-nums;}
/* fast calculator */
.cexpr{font-size:21px;font-weight:700;text-align:right;font-variant-numeric:tabular-nums;}
.cresult{margin-top:10px;background:#fff;border:1px solid var(--line);border-top:4px solid var(--amber);
  border-radius:12px;padding:14px 16px;text-align:right;cursor:pointer;display:flex;align-items:baseline;
  justify-content:flex-end;gap:10px;min-height:56px;}
.cresult .cr-frac{font-size:27px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--ink);letter-spacing:-.01em;}
.cresult .cr-dec{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}
.cresult.bad .cr-frac{color:var(--muted);font-weight:700;}
.chips{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap;}
.chip{flex:1;min-width:54px;border:1.5px solid var(--line);background:#fff;color:var(--steel);
  font-size:14px;font-weight:700;padding:11px 6px;border-radius:10px;cursor:pointer;font-variant-numeric:tabular-nums;}
.chip:active{background:#f2efe9;}
.keypad{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:10px;}
.key{border:1.5px solid var(--line);background:#fff;color:var(--ink);font-size:19px;font-weight:700;
  padding:16px 0;border-radius:12px;cursor:pointer;font-variant-numeric:tabular-nums;transition:background .1s,transform .06s;}
.key:active{transform:translateY(1px);background:#f2efe9;}
.key-op{color:var(--amber-dk);background:#fffaf0;}
.key-ins{font-size:12.5px;color:var(--steel);text-transform:uppercase;letter-spacing:.04em;}
.key-fn{color:var(--cut);font-size:16px;}
.key-eq{background:var(--ink);color:var(--paper);font-size:22px;border-color:var(--ink);}
.seglabel{font-size:11.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;text-align:center;margin-bottom:5px;}
.fcsub{font-size:12.5px;color:var(--muted);margin-top:14px;line-height:1.5;text-align:center;}
table{width:100%;border-collapse:collapse;}
thead th{font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);text-align:left;padding:0 6px 10px;font-weight:700;}
tbody td{padding:11px 6px;border-top:1px solid var(--line);font-size:14.5px;font-variant-numeric:tabular-nums;}
tbody tr:first-child td{border-top:none;}
tbody td:first-child{font-weight:700;}
tbody td:last-child{color:var(--good);font-weight:600;text-align:right;}
.reftip{background:#fff;border:1px solid var(--line);border-left:3px solid var(--cut);border-radius:10px;
  padding:13px 15px;margin-top:14px;font-size:13px;line-height:1.55;color:var(--ink-2);}
.reftip b{color:var(--cut);}
.legend{display:flex;flex-wrap:wrap;gap:12px;font-size:11.5px;color:var(--muted);margin-top:10px;}
.legend span{display:flex;align-items:center;gap:5px;}
.legend i{width:14px;height:14px;border-radius:3px;display:inline-block;}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);opacity:0;
  background:var(--ink);color:#fff;padding:12px 18px;border-radius:10px;font-size:13.5px;font-weight:600;
  box-shadow:var(--shadow);transition:opacity .2s,transform .2s;z-index:50;pointer-events:none;max-width:90%;text-align:center;}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
footer{text-align:center;font-size:11px;color:var(--muted);margin-top:26px;letter-spacing:.03em;}
@media print{
  .top,.tabbar,.btn,.btn-row,.toggle,#saveShareWrap,.legend,footer,.bar{display:none !important;}
  section{display:none !important;}section.active{display:block !important;}
  .card{box-shadow:none;border:1px solid #999;}
  body{background:#fff;}
}