/* ============ PocketBuilder — ledger notepad UI ============ */
:root{
  /* Blueprint Instrument: shared web UI owns the visual system on every host. */
  --blueprint-950:#071a38; --blueprint-800:#0a2b5b; --blueprint-650:#123e7a;
  --build-blue:#2f7ff0; --measure-cyan:#10b8d0; --signal:#ff982b;
  --chrome:#f8fafc; --chrome2:#e8edf3; --line:#cbd5e1;
  --ink:#10233f; --inkmut:#64748b;
  --accent:#0b718d; --accent2:#2f7ff0;
  --carry:#087f5b; --sel:#dff5f8;
  --keybg:#f8fafc; --keytxt:#10233f;
  --stripbg:#071a38; --opkey:#d7e3ee; --eqkey:#2f7ff0;
  --fnkey:#0a2b5b; --fntxt:#f8fafc; --unitkey:#c8d9e8; --unittxt:#10233f;
  /* paper (set at runtime by applyPaper; these are the "white" defaults) */
  --paper:#ffffff; --paperline:#e1e1e1; --papermargin:#f0c4bd;
  --papertxt:#1d1f22; --papermut:#a6a09a; --papernote:#14806a;
  --gutterline:#b9ceb9;
  --rh:28px; --tfs:15px; --nfs:12.5px;   /* ledger row height / value font / note font */
  --mono:ui-monospace,"Cascadia Mono","SF Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --chrome:#0f2746; --chrome2:#091d36; --line:#294464;
    --ink:#edf6ff; --inkmut:#a8b9cb;
    --accent:#5de3e8; --accent2:#6ca8ff;
    --carry:#65d6a1; --sel:#173b5f;
    --keybg:#17314f; --keytxt:#edf6ff;
    --stripbg:#06152d; --opkey:#23415e; --eqkey:#2f7ff0;
    --fnkey:#071a38; --fntxt:#f8fafc; --unitkey:#294d6b; --unittxt:#edf6ff;
  }
}
/* ===== selectable chrome themes (Settings); Auto = the two blocks above ===== */
:root[data-theme="light"]{
  --chrome:#f8fafc; --chrome2:#e8edf3; --line:#cbd5e1;
  --ink:#10233f; --inkmut:#64748b;
  --accent:#0b718d; --accent2:#2f7ff0;
  --carry:#087f5b; --sel:#dff5f8;
  --keybg:#f8fafc; --keytxt:#10233f;
  --unitkey:#c8d9e8; --unittxt:#10233f;
  --stripbg:#071a38; --opkey:#d7e3ee; --eqkey:#2f7ff0; --fnkey:#0a2b5b; --fntxt:#f8fafc; --chromeimg:none;
}
:root[data-theme="dark"]{
  --chrome:#0f2746; --chrome2:#091d36; --line:#294464;
  --ink:#edf6ff; --inkmut:#a8b9cb;
  --accent:#5de3e8; --accent2:#6ca8ff;
  --carry:#65d6a1; --sel:#173b5f;
  --keybg:#17314f; --keytxt:#edf6ff;
  --unitkey:#294d6b; --unittxt:#edf6ff;
  --stripbg:#06152d; --opkey:#23415e; --eqkey:#2f7ff0; --fnkey:#071a38; --fntxt:#f8fafc; --chromeimg:none;
}
/* Night Wood — dark walnut chrome; plank texture arrives via --woodimg (JS-generated) */
:root[data-theme="wood"]{
  --chrome:#2b2014; --chrome2:#221809; --line:#4a3a22;
  --ink:#efe4cd; --inkmut:#9c8d72;
  --accent:#d3822a; --accent2:#e0a04c;
  --carry:#7fc98f; --sel:#4a3d1f;
  --keybg:#3a2c1a; --keytxt:#efe4cd;
  --stripbg:#150c04; --opkey:#4c3a20; --eqkey:#6a4d24; --fnkey:#241a0d;
  --unitkey:#8a6a1c; --unittxt:#f7eecb;
  --chromeimg:var(--woodimg,none);
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
button,input,select{font:inherit;}
button:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{
  outline:3px solid color-mix(in srgb,var(--accent2) 75%,#fff 25%);
  outline-offset:2px;
}
html,body{margin:0;height:100%;overflow:hidden;overscroll-behavior:none;}
body{background:var(--chrome2);color:var(--ink);font-family:var(--sans);
  -webkit-user-select:none;user-select:none;
  touch-action:manipulation;}   /* no double-tap zoom — ⌫ double-tap must not zoom the page */
#app{position:fixed;inset:0;display:flex;flex-direction:column;overflow:hidden;}

/* ===== toolbar ===== */
#toolbar{display:flex;align-items:center;gap:6px;min-height:60px;padding:7px 12px;background:var(--chrome);background-image:var(--chromeimg,none);
  border-bottom:1px solid var(--line);box-shadow:0 2px 8px rgba(7,26,56,.08);flex-wrap:nowrap;overflow:visible;}
#toolbar::-webkit-scrollbar{display:none;}
.brand{appearance:none;border:none;background:none;cursor:pointer;color:var(--ink);
  font:800 20px/1 var(--sans);letter-spacing:-.035em;padding:2px 10px 2px 2px;white-space:nowrap;flex:0 0 auto;
  display:flex;align-items:center;gap:9px;min-width:44px;min-height:44px;}
.blueprint-mark{width:40px;height:40px;flex:0 0 auto;border-radius:10px;box-shadow:0 4px 10px rgba(7,26,56,.18);}
.brand-copy{color:var(--ink);}.brand-copy span{color:var(--accent);}
#brandLogo{display:none;height:28px;max-width:120px;object-fit:contain;flex:0 0 auto;margin-bottom:-1px;margin-right:3px;}
.brand.logo .blueprint-mark,.brand.logo .brand-copy{display:none;}
.brand.logo #brandLogo{display:block;}
.grp{display:flex;gap:3px;align-items:center;padding:0 5px;border-left:1px solid var(--line);flex:0 0 auto;}
#toolbar .sp{flex:1;min-width:6px;}
.tb{appearance:none;border:1px solid transparent;background:none;color:var(--ink);border-radius:7px;
  font:700 12px/1 var(--sans);padding:8px 10px;min-height:44px;cursor:pointer;white-space:nowrap;}
.tb:hover{background:var(--chrome2);border-color:var(--line);}
.tb:active{transform:translateY(1px);}
.tb:disabled{opacity:.38;cursor:default;transform:none;}
.tb:disabled:hover{background:none;border-color:transparent;}
.tb.icon{font-size:15px;padding:6px 10px;}
.tb[hidden]{display:none!important;}
.tb-label{display:inline;}
.mobile-more{display:none;flex:0 0 auto;}
.brand-light{display:none!important;}

/* ===== tabs ===== */
#tabbar{display:flex;align-items:center;gap:5px;min-height:52px;padding:4px 12px;background:var(--blueprint-950);
  border-bottom:1px solid #294464;overflow-x:auto;scrollbar-width:none;flex:0 0 auto;}
#tabbar::-webkit-scrollbar{display:none;}
#tabbar .tab-shell{display:flex;align-items:center;gap:4px;max-width:190px;padding:0 6px 0 0;
  border-radius:9px;background:rgba(255,255,255,.08);color:#b8c9db;border:1px solid rgba(255,255,255,.12);
  font:700 12.5px/1 var(--sans);cursor:pointer;white-space:nowrap;flex:0 1 auto;}
#tabbar .tab-shell.on{background:#f8fafc;color:var(--blueprint-950);border-color:#f8fafc;box-shadow:0 2px 8px rgba(0,0,0,.16);}
#tabbar .tab{appearance:none;border:0;background:transparent;color:inherit;cursor:pointer;padding:8px 6px 8px 12px;min-width:0;min-height:44px;}
#tabbar .tab .tx{display:block;overflow:hidden;text-overflow:ellipsis;}
#tabbar .tab-shell .x{opacity:.5;padding:0 3px;flex:0 0 auto;}
#tabbar .tab-shell .x:hover{opacity:1;color:var(--accent2);}
#tabbar .addtab{flex:0 0 auto;width:44px;height:44px;margin-left:2px;border-radius:9px;
  background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.18);font:800 17px/1 var(--sans);cursor:pointer;}
#tabbar button{appearance:none;}
#tabbar .tab-shell .x{appearance:none;border:0;background:none;color:inherit;cursor:pointer;border-radius:4px;min-width:24px;min-height:24px;}

/* ===== main split ===== */
.main{flex:1;min-height:0;display:flex;}
.taparea{position:relative;flex:1;min-width:0;min-height:0;display:flex;flex-direction:column;}

/* ===== ledger tape ===== */
.tapewrap{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;
  background-color:var(--paper);font-family:var(--mono);font-size:var(--tfs);color:var(--papertxt);
  background-image:repeating-linear-gradient(to bottom,transparent 0 calc(var(--rh) - 1px),var(--paperline) calc(var(--rh) - 1px) var(--rh));
  background-attachment:local;padding-top:calc(var(--rh)*1.6);padding-bottom:96px;}
.onboarding{position:absolute;z-index:5;top:18px;left:50%;transform:translateX(-50%);width:min(92%,520px);
  display:flex;align-items:flex-start;gap:14px;padding:14px 14px 14px 16px;border:1px solid color-mix(in srgb,var(--accent) 35%,var(--line));
  border-left:4px solid var(--accent);border-radius:12px;background:var(--paper);color:var(--papertxt);
  box-shadow:0 8px 26px rgba(0,0,0,.16);font-family:var(--sans);}
.onboarding[hidden]{display:none;}
.onboarding-copy{display:flex;flex-direction:column;gap:5px;min-width:0;line-height:1.35;}
.onboarding-copy strong{font-size:14px;}
.onboarding-copy span{font-size:13px;}
.onboarding-copy small{font-size:11.5px;color:var(--papernote);}
.onboarding > button{appearance:none;border:0;background:transparent;color:var(--papermut);cursor:pointer;border-radius:6px;
  width:44px;height:44px;flex:0 0 auto;font-size:16px;}
/* the page sits inside a bounding box so it doesn't read as infinite */
.taparea{border-right:1px solid var(--line);}
@media (min-width:701px){ .taparea{max-width:none;} .main{padding:12px 0 12px 12px;background:var(--chrome2);background-image:var(--chromeimg,none);}
  .taparea{border:1px solid var(--line);border-radius:8px 0 0 8px;overflow:hidden;box-shadow:0 1px 4px rgba(0,0,0,.12) inset;} }
/* optional vertical margin rule (Settings → Paper rule) */
#app[data-rule="on"] .tapewrap{background-image:
  linear-gradient(90deg,transparent 0 40px,var(--papermargin) 40px 42px,transparent 42px),
  repeating-linear-gradient(to bottom,transparent 0 calc(var(--rh) - 1px),var(--paperline) calc(var(--rh) - 1px) var(--rh));}
/* invisible divider down the middle: value column and note column are equal
   flexible tracks (not content-hugging), so the note column always starts at
   the same x position regardless of how long the number is — equations left,
   notes right-justified against the far edge. */
#app[data-rule="on"] .tline{grid-template-columns:48px 32px minmax(0,1fr) minmax(0,1fr);}
.tline{display:grid;grid-template-columns:44px 32px minmax(0,1fr) minmax(0,1fr);
  min-height:var(--rh);cursor:pointer;position:relative;font-variant-numeric:tabular-nums;}
.tline::before{content:attr(data-n);color:var(--papermut);font-size:10.5px;text-align:right;padding-right:12px;
  line-height:var(--rh);position:relative;top:calc(var(--rh)*0.18);user-select:none;}
.tline > .op,.tline > .val,.tline > .note,.tline > .txt{line-height:var(--rh);position:relative;top:calc(var(--rh)*0.18);}
.tline .op{color:var(--papertxt);font-weight:700;text-align:right;padding-right:8px;font-size:calc(var(--tfs) - 1px);}
.tline .val{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding-left:8px;}
.tline .note{color:var(--papernote);font-style:italic;font-family:var(--sans);font-size:var(--nfs);
  text-align:right;padding-left:14px;padding-right:34px;white-space:normal;overflow-wrap:anywhere;word-break:break-word;}
.tline .note:empty{display:none;}
.tline.blank{cursor:pointer;}
.tline.sep{height:0;min-height:0;overflow:hidden;cursor:default;}
.tline.sep.gap{height:var(--rh);min-height:var(--rh);}
.tline.carry .op{color:var(--carry);}
.tline.carry .note{color:var(--papermut);}
.tline.subtotal::before{content:"\2261";}
.tline.subtotal .op{color:var(--accent);font-weight:800;}
.tline.subtotal{background:color-mix(in srgb,var(--accent) 6%,transparent);}
.tline.subtotal .val{font-size:calc(var(--tfs) + 2px);font-weight:900;box-shadow:inset 0 2px 0 var(--papertxt);color:var(--accent);}
.tline.info .val,.tline.calcnote .val{font-weight:600;}
.tline.calcnote.src-print .val,.tline.calcnote.src-print .note{text-transform:uppercase;font-weight:800;}
.tline.prose{grid-template-columns:44px minmax(0,1fr);}
.tline.prose .txt{grid-column:2;font-size:var(--nfs);font-weight:600;font-style:italic;color:var(--papernote);
  font-family:var(--sans);white-space:normal;overflow-wrap:anywhere;padding:0 8px;}
.tline.sel{background:color-mix(in srgb,var(--papertxt) 9%,transparent);}
.tline.calc-error{background:color-mix(in srgb,#c53b2f 12%,var(--paper));box-shadow:inset 3px 0 0 #c53b2f;}
.tline.active .val{font-weight:700;}
.tline.caret .val::after{content:"";display:inline-block;width:1.6px;height:var(--tfs);background:var(--papertxt);
  margin-left:2px;vertical-align:-2px;animation:bl 1.1s steps(1) infinite;}
@keyframes bl{50%{opacity:0;}}
@media (prefers-reduced-motion:reduce){ .tline.caret .val::after{animation:none;} }
.tline .cpy{position:absolute;right:6px;top:50%;transform:translateY(-50%);font-size:13px;line-height:1;
  font-style:normal;color:var(--papermut);opacity:0;cursor:pointer;padding:4px 6px;border-radius:6px;transition:opacity .12s;}
@media (hover:hover){ .tline:hover .cpy{opacity:1;} .tline .cpy:hover{color:var(--papertxt);background:rgba(0,0,0,.07);} }

/* ===== find in tape ===== */
.findbar{display:none;align-items:center;gap:6px;flex:0 0 auto;background:var(--chrome2);
  border-bottom:1px solid var(--line);padding:7px 10px;}
.findbar.on{display:flex;}
.findbar input{flex:1;min-width:0;font:600 14px/1.2 var(--sans);background:var(--paper);color:var(--papertxt);
  border:1px solid var(--line);border-radius:7px;outline:none;padding:8px 10px;}
.find-count{flex:0 0 auto;font:600 11.5px/1 var(--mono);color:var(--inkmut);min-width:34px;text-align:center;}
.find-nav{appearance:none;flex:0 0 auto;background:var(--chrome);border:1px solid var(--line);color:var(--ink);
  border-radius:7px;width:32px;height:32px;font-size:14px;cursor:pointer;}
.find-nav:hover{background:rgba(0,0,0,.06);}
.tline.hit{background:color-mix(in srgb,var(--unitkey,#f0d87a) 30%,transparent);}
.tline.hit-cur{background:color-mix(in srgb,var(--unitkey,#f0d87a) 62%,transparent);box-shadow:inset 3px 0 0 var(--accent);}

/* ===== roof / stair panels ===== */
.toppanel{position:absolute;inset:0;z-index:6;display:none;overflow-y:auto;background:var(--paper);
  color:var(--papertxt);padding:14px 16px 18px;}
.toppanel.on{display:block;}
.tphdr{display:flex;align-items:center;gap:8px;font:800 13px/1 var(--sans);letter-spacing:1.5px;
  color:var(--papertxt);text-transform:uppercase;margin-bottom:8px;}
.tphint{flex:1;font-size:11px;font-weight:600;color:var(--papermut);text-transform:none;letter-spacing:0;}
.tpx{appearance:none;border:0;background:transparent;cursor:pointer;color:var(--papermut);font-weight:700;font-size:18px;padding:4px 8px;border-radius:6px;min-width:44px;min-height:44px;}
.tpbtns{display:flex;justify-content:flex-end;margin-top:16px;}
.tpbtns .btn{padding:14px 24px;font-size:16px;flex:0 0 auto;}
#roofcells,#staircells{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
@media (min-width:720px){ #roofcells,#staircells{grid-template-columns:repeat(3,minmax(0,1fr));max-width:760px;} }
.cc{position:relative;background:color-mix(in srgb,var(--paper) 93%,var(--papertxt) 7%);
  border:1.5px solid color-mix(in srgb,var(--papertxt) 20%,transparent);border-radius:14px;
  padding:14px 16px 15px;display:flex;flex-direction:column;gap:6px;min-width:0;}
.cc span{font-size:11px;font-weight:700;color:var(--papermut);text-transform:uppercase;letter-spacing:.8px;}
.cc b{font-size:clamp(20px,5.6vw,30px);color:var(--papertxt);font-variant-numeric:tabular-nums;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.cc.ed{cursor:pointer;}
.cc.ed::after{content:"\270E";position:absolute;top:10px;right:12px;font-size:12px;color:var(--papermut);}
.lblrow{grid-column:1/-1;font:800 11px/1 var(--sans);letter-spacing:1.5px;color:var(--papermut);
  text-transform:uppercase;padding:10px 2px 2px;border-top:1px dashed var(--papermut);margin-top:4px;}

/* ===== prints side panel — saved roof/stair solves, kept across tapes ===== */
#sidepanel{display:none;flex-direction:column;min-height:0;background:var(--chrome);
  background-image:var(--chromeimg,none);border-right:1px solid var(--line);overflow:hidden;}
#app[data-panel="on"] #sidepanel{display:flex;}
.sp-hd{flex:0 0 auto;display:flex;align-items:center;gap:8px;padding:9px 12px;border-bottom:1px solid var(--line);}
.sp-tabs{display:flex;gap:4px;}
.sp-tab{appearance:none;border:1px solid var(--line);background:var(--chrome2);color:var(--inkmut);
  border-radius:8px;font:800 10.5px/1 var(--sans);letter-spacing:.8px;text-transform:uppercase;padding:8px 10px;cursor:pointer;}
.sp-tab.on{background:var(--accent);border-color:transparent;color:#fff;}
.sp-x{appearance:none;border:0;background:transparent;margin-left:auto;cursor:pointer;color:var(--inkmut);font-size:15px;font-weight:700;padding:6px;border-radius:6px;width:44px;height:44px;}
.sp-x:hover{background:rgba(0,0,0,.08);color:var(--ink);}
.sp-body{flex:1;min-height:0;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px;}
.sp-empty{font:500 12.5px/1.5 var(--sans);color:var(--inkmut);padding:6px 4px;}
.sp-empty b{color:var(--ink);}
.print{display:flex;align-items:stretch;gap:10px;background:var(--chrome2);border:1px solid var(--line);
  border-radius:12px;padding:10px 10px 10px 0;overflow:hidden;}
.pr-tag{flex:0 0 auto;width:6px;border-radius:6px 0 0 6px;}
.pr-roof{background:var(--accent);} .pr-stair{background:var(--unitkey,#e0912f);} .pr-mat{background:#4a9d6e;}
.pr-main{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:center;gap:3px;}
.pr-title{font:800 12px/1.1 var(--sans);letter-spacing:.6px;color:var(--ink);text-transform:uppercase;}
.pr-sub{font:600 12.5px/1.2 var(--mono);color:var(--inkmut);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.pr-acts{flex:0 0 auto;display:flex;flex-direction:column;gap:6px;justify-content:center;}
.pr-send,.pr-del{appearance:none;border:1px solid var(--line);background:var(--chrome);color:var(--ink);
  border-radius:7px;width:30px;height:26px;font:700 14px/1 var(--sans);cursor:pointer;}
.pr-send{background:var(--accent);color:#fff;border-color:transparent;}
.pr-del:hover{background:rgba(0,0,0,.08);}
/* materials node hub */
.mat-intro{font:500 12px/1.5 var(--sans);color:var(--inkmut);margin-bottom:4px;}
.mat-intro b{color:var(--ink);}
.mat-node{display:flex;flex-direction:column;gap:2px;text-align:left;width:100%;appearance:none;cursor:pointer;
  background:var(--chrome2);border:1px solid var(--line);border-radius:11px;padding:11px 12px;}
.mat-node:hover{border-color:var(--accent);}
.mn-name{font:800 13px/1.1 var(--sans);color:var(--ink);}
.mn-hint{font:500 11px/1.3 var(--sans);color:var(--inkmut);}
.mf-hd{display:flex;align-items:center;gap:8px;margin-bottom:10px;}
.mf-back{appearance:none;border:1px solid var(--line);background:var(--chrome2);color:var(--ink);border-radius:7px;
  font:700 11.5px/1 var(--sans);padding:7px 9px;cursor:pointer;}
.mf-title{font:800 13px/1 var(--sans);letter-spacing:.6px;text-transform:uppercase;color:var(--ink);}
.mf-fields{display:flex;flex-direction:column;gap:8px;}
.mf-row{display:flex;flex-direction:column;gap:4px;font:600 11px/1.2 var(--sans);color:var(--inkmut);}
.mf-row i{font-style:normal;opacity:.75;}
.mf-in{font:600 15px/1.2 var(--mono);background:var(--paper);color:var(--papertxt);border:1px solid var(--line);
  border-radius:8px;outline:none;padding:9px 10px;}
.mf-in:focus{border-color:var(--accent);}
.mf-out{margin:12px 0;border:1px solid var(--line);border-radius:10px;overflow:hidden;}
.mo-row{display:flex;align-items:baseline;gap:8px;padding:7px 11px;border-bottom:1px solid var(--line);}
.mo-row:last-child{border-bottom:none;}
.mo-final{background:color-mix(in srgb,#4a9d6e 16%,transparent);}
.mo-v{font:800 14px/1.2 var(--mono);color:var(--ink);flex:0 0 auto;min-width:64px;}
.mo-t{font:600 11.5px/1.3 var(--sans);color:var(--inkmut);}
.mo-empty{padding:12px;font:500 12px/1.4 var(--sans);color:var(--inkmut);text-align:center;}
.mf-acts{display:flex;gap:8px;}
.mf-acts .btn{flex:1;}
#app[data-panel="on"] #panelBtn{background:var(--accent);color:#fff;border-color:transparent;}
@media (min-width:701px){ #app[data-panel="on"] #sidepanel{flex:0 0 248px;} }
@media (max-width:700px){
  #sidepanel{position:fixed;top:0;left:0;bottom:0;width:min(86vw,340px);z-index:60;
    border-right:1px solid var(--line);box-shadow:6px 0 22px rgba(0,0,0,.35);}
}

/* ===== note strip (above the keypad): tap abc, QWERTY opens, text lands on the line —
   Enter is the only way to close it; while active the OS keyboard fully overlays the numpad ===== */
.notestrip{display:flex;align-items:center;gap:8px;background:var(--chrome2);border-top:1px solid var(--line);
  padding:6px 8px;flex:0 0 auto;}
.notestrip .ns-lab{appearance:none;border:1px solid var(--line);background:var(--chrome);color:var(--ink);
  border-radius:7px;font:800 13px/1 var(--sans);padding:9px 14px;cursor:pointer;flex:0 0 auto;}
.notestrip input{display:none;}
.notestrip.on .ns-lab{display:none;}
.notestrip.on input{display:block;flex:1;min-width:0;font:italic 500 14px/1.2 var(--sans);background:none;
  border:none;outline:none;color:var(--ink);-webkit-user-select:text;user-select:text;padding:8px 4px;}
.notestrip input::placeholder{color:var(--inkmut);}

/* ===== keypad — CalcTape style: flat, gapless, hairline grid ===== */
#keys{flex:0 0 308px;background:var(--stripbg);background-image:var(--chromeimg,none);
  border-left:1px solid var(--line);padding:0;display:flex;flex-direction:column;overflow:hidden;}
#pads{flex:0 0 auto;}
#keys.note-active #pads{display:none;}   /* while noting, the OS keyboard fully replaces the numpad */
.np{display:none;grid-auto-rows:58px;gap:1px;background:#294464;border-top:1px solid #294464;}
.np-full{grid-template-columns:repeat(5,1fr);}
.np-reduced,.np-minimal{grid-template-columns:repeat(4,1fr);}
#keys[data-kp="full"] .np-full{display:grid;}
#keys[data-kp="reduced"] .np-reduced{display:grid;}
#keys[data-kp="minimal"] .np-minimal{display:grid;}
.key{appearance:none;border:none;border-radius:0;color:var(--keytxt);background:var(--keybg);
  font:600 20px/1 var(--sans);padding:0;cursor:pointer;text-align:center;
  display:flex;align-items:center;justify-content:center;}
.key:active,.key.hit{filter:brightness(.88);}
.key.op{background:var(--opkey,color-mix(in srgb,var(--chrome2) 70%,#8fa6b5 30%));font-size:21px;}
.key.ac{background:var(--signal);color:var(--blueprint-950);font:900 17px/1 var(--sans);}
.key.eq{background:var(--eqkey,color-mix(in srgb,var(--chrome2) 55%,#8fa6b5 45%));font-size:22px;}
.key.small{font-size:16px;}
.key.unit{background:var(--opkey,color-mix(in srgb,var(--chrome2) 70%,#8fa6b5 30%));font:700 15px/1 var(--mono);}
.key.unit.dim{opacity:.4;}
.key.fn{background:var(--fnkey,#2e3a4c);color:var(--fntxt,#eef2f7);font:700 13.5px/1 var(--sans);}
.key.fn.small{font:700 12.5px/1 var(--sans);}
.key.fn.has::after{content:"";position:absolute;top:7px;right:9px;width:6px;height:6px;border-radius:50%;background:var(--accent2);}
.key{position:relative;}

/* ===== bottom info bar (MR / Grand Total / font size) ===== */
#statusbar{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-height:48px;
  padding:2px 12px calc(2px + env(safe-area-inset-bottom));
  background:var(--blueprint-950);border-top:1px solid #294464;color:#edf6ff;
  font-family:var(--mono);}
#statusbar .sp{flex:1;min-width:6px;}
.st-mem{font:700 11px/1 var(--mono);color:#a8b9cb;white-space:nowrap;}
.st-glab{font:700 9.5px/1 var(--sans);text-transform:uppercase;letter-spacing:.1em;color:#a8b9cb;white-space:nowrap;}
.st-grand{font:900 16px/1 var(--mono);color:var(--measure-cyan);white-space:nowrap;max-width:44vw;overflow:hidden;text-overflow:ellipsis;}
.st-font{display:flex;align-items:center;gap:4px;margin-left:4px;flex:0 0 auto;}
.stepbtn{appearance:none;width:44px;height:44px;border:1px solid #47627e;background:#102b4a;
  color:#edf6ff;border-radius:9px;font:700 15px/1 var(--sans);cursor:pointer;display:flex;align-items:center;justify-content:center;}
.stepbtn:active{transform:translateY(1px);}
.st-fsz{font:700 11px/1 var(--mono);color:#edf6ff;width:20px;text-align:center;}

/* ===== settings sheet / toast (shared) ===== */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:flex-end;justify-content:center;z-index:50;}
.scrim.on{display:flex;}
.sheet{background:var(--chrome);width:100%;max-width:460px;border-radius:18px 18px 0 0;padding:0 16px 16px;
  border-top:3px solid var(--accent);box-shadow:0 -6px 24px rgba(0,0,0,.4);max-height:88vh;overflow-y:auto;}
.sheet-head{position:sticky;top:0;z-index:2;display:flex;align-items:center;gap:12px;margin:0 -16px 12px;padding:14px 16px 12px;
  background:var(--chrome);border-bottom:1px solid var(--line);}
.sheet h4{margin:0;font-size:16px;color:var(--ink);}
.sheet-close{appearance:none;border:1px solid var(--line);background:var(--chrome2);color:var(--ink);margin-left:auto;
  width:44px;height:44px;border-radius:9px;cursor:pointer;font-size:16px;}
.mrow{margin-bottom:14px;}
.mrow .ml{font:700 11px/1 var(--sans);text-transform:uppercase;letter-spacing:.6px;color:var(--inkmut);margin-bottom:6px;}
.seg{display:flex;gap:6px;flex-wrap:wrap;}
.seg button{flex:1;min-width:62px;background:var(--chrome2);border:1px solid var(--line);color:var(--ink);
  border-radius:9px;padding:9px 6px;font:700 12.5px/1 var(--sans);cursor:pointer;}
.seg button.on{background:var(--accent);border-color:var(--accent);color:#fff;}
.logorow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.logorow .btn{flex:0 0 auto;padding:9px 14px;font-size:12.5px;}
.logoprev{height:38px;max-width:120px;object-fit:contain;border:1px solid var(--line);border-radius:8px;
  padding:3px 6px;background:var(--paper);flex:0 0 auto;}
.logohint{flex:1 1 140px;font:500 11px/1.4 var(--sans);color:var(--inkmut);}
.swatch{width:34px;height:34px;border-radius:8px;border:2px solid var(--line);cursor:pointer;flex:0 0 auto;}
.swatch.on{border-color:var(--accent2);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent2) 35%,transparent);}
.menubtns{display:flex;gap:10px;margin-top:6px;}
.btn{background:var(--accent);color:#fff;border:none;border-radius:9px;padding:11px 15px;
  font:700 14px/1 var(--sans);cursor:pointer;flex:1;}
.btn.alt{background:var(--chrome2);border:1px solid var(--line);color:var(--ink);}
.presets{display:grid;grid-template-columns:repeat(4,1fr);gap:10px 8px;}
.preset{appearance:none;border:2px solid var(--line);background:none;border-radius:10px;padding:6px 4px 5px;
  cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:5px;font:700 9.5px/1.1 var(--sans);color:var(--inkmut);}
.preset.on{border-color:var(--accent2);}
.preset .sw{width:38px;height:26px;border-radius:6px;border:1px solid rgba(0,0,0,.18);overflow:hidden;
  display:flex;} .preset .sw i{flex:1;height:100%;} 
.clrgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px 6px;}
.clr{display:flex;flex-direction:column;align-items:center;gap:4px;font:700 9px/1 var(--sans);
  letter-spacing:.05em;text-transform:uppercase;color:var(--inkmut);}
.clr input[type=color]{appearance:none;width:44px;height:34px;border:1px solid var(--line);border-radius:9px;
  background:none;padding:2px;cursor:pointer;}
.clr input[type=color]::-webkit-color-swatch-wrapper{padding:2px;}
.clr input[type=color]::-webkit-color-swatch{border:none;border-radius:6px;}
.menufoot{text-align:center;margin-top:12px;font-size:11px;color:var(--inkmut);}
.menufoot a{color:var(--inkmut);text-decoration:underline;}
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:var(--ink);color:var(--chrome);
  border:1px solid var(--accent);padding:9px 16px;border-radius:20px;font:600 13px/1.3 var(--sans);
  opacity:0;transition:opacity .25s;z-index:60;pointer-events:none;max-width:90%;text-align:center;}
.toast.on{opacity:1;}

/* ===== responsive shell: tape remains primary, compact mode is height-aware ===== */
@media (max-width:700px){
  .main{flex-direction:column;}
  .taparea{min-height:clamp(210px,32vh,300px);}
  #keys{flex:0 0 auto;border-left:none;border-top:1px solid #294464;padding:0;overflow:hidden;}
  .np{grid-auto-rows:44px;}
  .np-minimal{grid-auto-rows:46px;}
  .key{font-size:17px;}
  .key.fn,.key.unit{font-size:12.5px;}
  .key.fn.small{font-size:11px;}
  #toolbar{min-height:54px;padding:5px 8px;background:linear-gradient(135deg,var(--blueprint-800),var(--blueprint-950));border-bottom-color:#294464;}
  .blueprint-mark{width:36px;height:36px;border-radius:9px;}
  .brand{font-size:17px;padding-right:5px;color:#fff;gap:7px;}
  .brand-copy{color:#fff;}.brand-copy span{color:var(--measure-cyan);}
  .tb{padding:5px 8px;color:#edf6ff;}
  .grp{padding:0 2px;border-left:0;}
  #toolbar .sp{display:none;}
  #toolbar .toolbar-actions{display:none;position:fixed;z-index:70;top:60px;right:10px;width:min(250px,calc(100vw - 20px));
    padding:8px;background:#f8fafc;border:1px solid #cbd5e1;border-radius:12px;box-shadow:0 12px 30px rgba(7,26,56,.3);
    flex-direction:column;align-items:stretch;}
  #toolbar .toolbar-actions.on{display:flex;}
  #toolbar .toolbar-actions .tb{display:flex!important;align-items:center;gap:10px;width:100%;min-height:44px;color:var(--blueprint-950);text-align:left;padding:10px 12px;}
  .mobile-more{display:flex;align-items:center;gap:4px;margin-left:auto;min-height:44px;}
  .onboarding{top:10px;}
  .sheet{max-height:94vh;}
  #tabbar .tab-shell .x{min-width:44px;min-height:44px;}
  .notestrip{padding:4px 6px;background:var(--stripbg);border-color:#294464;}
  .notestrip .ns-lab{display:flex!important;align-items:center;justify-content:center;min-width:52px;min-height:44px;
    padding:8px 10px;background:var(--signal);border-color:transparent;color:var(--blueprint-950);}
  .notestrip.on input{display:block;color:#edf6ff;}
  .notestrip.on .ns-lab{background:#edf6ff;color:var(--blueprint-950);}
  #keys.note-active #pads{display:none;}
  .tline,.tline.prose,#app[data-rule="on"] .tline{grid-template-columns:28px 28px minmax(0,1fr) minmax(0,1fr);}
  .tline .note{padding-left:10px;padding-right:12px;}
}
@media (max-width:430px){
  #undoB .history-label,#redoB .history-label{display:none;}
  #undoB,#redoB{min-width:44px;min-height:44px;justify-content:center;font-size:17px;}
  .brand-copy{display:none;}
  #tabbar{padding-inline:8px;}
}

/* ===== desktop application shell: compact instrument command bar ===== */
@media (min-width:701px){
  #toolbar .tb{display:flex;align-items:center;gap:6px;}
  #toolbar .tb > span[aria-hidden="true"]{font-size:17px;line-height:1;}
  #toolbar .mobile-more{display:none;}
  .main{padding:16px;background:#d8e1eb;background-image:none;gap:0;}
  .taparea{
    max-width:1120px;margin-left:auto;background:var(--paper);border-radius:10px 0 0 10px!important;
    box-shadow:0 6px 24px rgba(7,26,56,.18)!important;
  }
  #keys{flex-basis:320px;box-shadow:-4px 0 12px rgba(7,26,56,.12);border-radius:0 10px 10px 0;}
  .notestrip{display:none;}
  .notestrip.on{
    display:block;position:fixed;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);
    padding:0;border:0;
  }
  .notestrip.on input{display:block;width:1px;height:1px;padding:0;}
}

/* The unnumbered paper keeps a blank margin gutter, then places operators to the right of the rule. */
.tline,.tline.prose{grid-template-columns:32px 32px minmax(0,1fr) minmax(0,1fr);}
#app[data-rule="on"] .tline{grid-template-columns:32px 32px minmax(0,1fr) minmax(0,1fr);}
.tline::before{display:none;}
.tline .op{grid-column:2;}
.tline .val{grid-column:3;}
.tline .note{grid-column:4;}
.tline.prose .txt{grid-column:4;}
#app[data-rule="on"] .tapewrap{
  background-image:linear-gradient(90deg,transparent 0 24px,var(--papermargin) 24px 26px,transparent 26px),
  repeating-linear-gradient(to bottom,transparent 0 calc(var(--rh) - 1px),var(--paperline) calc(var(--rh) - 1px) var(--rh));
}
.tline.note-editing .note{background:color-mix(in srgb,var(--papernote) 8%,transparent);}
.tline.note-editing .note::after{
  content:"";display:inline-block;width:1.6px;height:var(--nfs);margin-left:2px;vertical-align:-2px;
  background:var(--papernote);animation:bl 1.1s steps(1) infinite;
}

/* JS derives compact mode from viewport height/width so rotation updates immediately. */
#app[data-compact="on"] #toolbar{min-height:50px;padding:3px 8px;background:linear-gradient(135deg,var(--blueprint-800),var(--blueprint-950));border-bottom-color:#294464;}
#app[data-compact="on"] .blueprint-mark{width:34px;height:34px;border-radius:8px;}
#app[data-compact="on"] .brand{font-size:16px;color:#fff;min-height:42px;}
#app[data-compact="on"] .brand-copy{color:#fff;}
#app[data-compact="on"] .brand-copy span{color:var(--measure-cyan);}
#app[data-compact="on"] #toolbar .toolbar-actions{display:none;position:fixed;z-index:70;top:54px;right:8px;width:min(250px,calc(100vw - 16px));
  padding:8px;background:#f8fafc;border:1px solid #cbd5e1;border-radius:12px;box-shadow:0 12px 30px rgba(7,26,56,.3);flex-direction:column;}
#app[data-compact="on"] #toolbar .toolbar-actions.on{display:flex;}
#app[data-compact="on"] #toolbar .toolbar-actions .tb{display:flex!important;color:var(--blueprint-950);width:100%;min-height:44px;text-align:left;}
#app[data-compact="on"] .mobile-more{display:flex;color:#fff;margin-left:auto;min-height:44px;}
#app[data-compact="on"] #tabbar{min-height:40px;padding-block:3px;}
#app[data-compact="on"] #tabbar .tab{min-height:34px;}
#app[data-compact="on"] #tabbar .addtab{width:34px;height:34px;}
#app[data-compact="on"] .main{padding:0;background:var(--chrome2);}
#app[data-compact="on"] #keys{border-radius:0;overflow:hidden;}
#app[data-compact="on"] .np-minimal{grid-auto-rows:40px;}
#app[data-compact="on"] .notestrip{padding:2px 5px;}
#app[data-compact="on"] .notestrip .ns-lab{min-height:36px;}
#app[data-compact="on"] #statusbar{min-height:42px;}
#app[data-compact="on"] .st-font{display:none;}
@media (orientation:portrait){
  #app[data-compact="on"] .main{flex-direction:column;}
  #app[data-compact="on"] .taparea{min-height:132px;}
  #app[data-compact="on"] #keys{flex:0 0 auto;width:100%;border-left:0;border-top:1px solid #294464;}
}
@media (orientation:landscape){
  #app[data-compact="on"] .main{flex-direction:row;}
  #app[data-compact="on"] .taparea{min-height:0;border-radius:0!important;}
  #app[data-compact="on"] #keys{flex:0 0 min(43vw,360px);border-left:1px solid #294464;}
  #app[data-compact="on"] .np-minimal{grid-auto-rows:min(42px,calc((100vh - 130px)/6));}
  #app[data-compact="on"] .notestrip .ns-lab{min-height:34px;}
  #app[data-compact="on"] .brand-copy{display:inline;}
}
@media (max-width:700px){
  .tline,.tline.prose,#app[data-rule="on"] .tline{grid-template-columns:28px 28px minmax(0,1fr) minmax(0,1fr);}
  .tline .note{padding-left:10px;padding-right:12px;}
}