:root {
  --bg: #e7eaee;
  --panel: #f5f6f8;
  --panel2: #ffffff;
  --border: #c8cdd5;
  --border-soft: #dde1e7;
  --text: #1d2430;
  --muted: #5f6877;
  --accent: #1f6fd1;
  --accent-weak: #dbe8fb;
  --hover: #eaf1fc;
  --danger: #c62828;
  --ok: #2e7d32;
  --title: #26303c;
  --sketch: #1d4ed8;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 12px;
  color: var(--text);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; background: var(--bg); }
button { font: inherit; color: inherit; }
input, select { font: inherit; color: inherit; }

#app { display: grid; grid-template-rows: 30px auto 1fr 22px; height: 100vh; user-select: none; }
#app input, #app select, .modal { user-select: text; }

/* ---------- Title bar & menus ---------- */
#titlebar {
  display: flex; align-items: center; gap: 8px;
  background: var(--title); color: #e9edf2; padding: 0 8px; user-select: none;
}
.logo { display: flex; align-items: center; gap: 6px; font-weight: 600; letter-spacing: .3px; margin-right: 6px; }
.logo-mark { width: 22px; height: 22px; display: block; }
.about-mark { float: left; width: 72px; height: 72px; margin: -4px 14px 6px -4px; }
#menubar { display: flex; }
#menubar button {
  background: none; border: 0; color: #dfe5ec; padding: 4px 10px; border-radius: 3px; cursor: default;
}
#menubar button:hover, #menubar button.open { background: rgba(255,255,255,.12); }
#doc-title { flex: 1; text-align: center; color: #c9d2dc; }
.titlebar-right button {
  width: 22px; height: 22px; border-radius: 50%; border: 1px solid #5d6a7a; background: none; color: #dfe5ec; cursor: pointer;
}

#dropdown, #ctxmenu {
  position: fixed; background: var(--panel2); border: 1px solid var(--border);
  box-shadow: 0 6px 18px rgba(20,30,45,.18); padding: 4px 0; min-width: 200px; border-radius: 3px;
}
#dropdown { z-index: 1000; }
#ctxmenu { z-index: 2500; max-height: 86vh; overflow-y: auto; } /* (also over dialogs: column menus) */
table.bom th.bc-h { cursor: pointer; }
table.bom th.bc-h:hover { background: var(--hover); }
table.bom th.bc-h::after { content: ' ▾'; color: var(--muted); font-weight: normal; }
table.bom td input.bc-v { width: 100%; min-width: 70px; box-sizing: border-box; border: 1px solid transparent; background: transparent; font: inherit; padding: 1px 2px; }
table.bom td input.bc-v:hover, table.bom td input.bc-v:focus { border-color: var(--border); background: var(--panel2); }
table.bom tr.bc-total td { font-weight: 600; border-top: 2px solid var(--border); }
table.bom td.num { text-align: right; }
.mi {
  display: flex; align-items: center; gap: 8px; padding: 5px 14px 5px 10px; cursor: default; white-space: nowrap;
}
.mi:hover { background: var(--hover); }
.mi.disabled { color: #a0a6b0; pointer-events: none; }
.mi .mi-icon { width: 18px; height: 18px; display: inline-grid; place-items: center; }
.mi .mi-icon svg { width: 18px; height: 18px; }
.mi .mi-label { flex: 1; }
.mi .mi-key { color: var(--muted); font-size: 11px; margin-left: 24px; }
.msep { height: 1px; background: var(--border-soft); margin: 4px 0; }

/* ---------- Command ribbon ---------- */
#commandmanager { background: var(--panel2); border-bottom: 1px solid var(--border); user-select: none; }
/* two rows of buttons (icon, its label under it on up to two lines), filled column by column; the icon size
   (View > Toolbar Icons, or right-click the ribbon) sets the buttons' size and so the ribbon's height */
#commandmanager { --cm-ic: 20px; --cm-w: 70px; --cm-h: 50px; --cm-fs: 10px; }
#commandmanager.cm-small { --cm-ic: 16px; --cm-w: 62px; --cm-h: 44px; --cm-fs: 9.5px; }
#commandmanager.cm-large { --cm-ic: 26px; --cm-w: 80px; --cm-h: 58px; --cm-fs: 11px; }
#cm-buttons {
  display: grid; grid-auto-flow: column; grid-template-rows: repeat(2, var(--cm-h)); grid-auto-columns: max-content;
  align-content: start; justify-content: start; gap: 1px 1px; padding: 3px 6px 3px; overflow-x: auto; overflow-y: hidden;
}
.cm-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: flex-start; gap: 2px;
  width: var(--cm-w); height: var(--cm-h); padding: 3px 1px 1px; background: none; border: 1px solid transparent; border-radius: 3px; cursor: default;
  font-size: var(--cm-fs); line-height: 1.08; text-align: center;
}
.cm-btn > span:last-child { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; overflow-wrap: anywhere; }
.cm-btn svg { width: var(--cm-ic); height: var(--cm-ic); flex: none; }
.cm-btn:hover { background: var(--hover); border-color: #b9d0f2; }
.cm-btn.active { background: var(--accent-weak); border-color: #8fb4ea; }
.cm-btn:disabled { opacity: .4; pointer-events: none; }
.cm-sep { width: 1px; background: var(--border-soft); margin: 3px 3px; grid-row: 1 / span 2; }
#cm-tabs { display: flex; padding: 0 6px; border-top: 1px solid var(--border-soft); background: var(--panel); }
#cm-tabs button {
  border: 0; background: none; padding: 4px 14px; cursor: default; border-bottom: 2px solid transparent; color: var(--muted);
}
#cm-tabs button:hover { color: var(--text); }
#cm-tabs button.active { color: var(--text); border-bottom-color: var(--accent); background: var(--panel2); }

/* ---------- Workspace ---------- */
#workspace { display: grid; grid-template-columns: var(--lp-width, 270px) 4px 1fr; min-height: 0; }
#leftpanel { display: flex; flex-direction: column; background: var(--panel); border-right: 1px solid var(--border); min-height: 0; }
#lp-tabs { display: flex; gap: 2px; padding: 4px 4px 0; border-bottom: 1px solid var(--border); background: var(--panel); }
#lp-tabs button {
  width: 34px; height: 26px; border: 1px solid transparent; border-bottom: 0; background: none; border-radius: 3px 3px 0 0;
  display: grid; place-items: center; cursor: default;
}
#lp-tabs button svg { width: 18px; height: 18px; }
#lp-tabs button.active { background: var(--panel2); border-color: var(--border); margin-bottom: -1px; }
.lp-view { flex: 1; overflow: auto; background: var(--panel2); min-height: 0; }
#splitter { cursor: col-resize; background: var(--bg); }
#splitter:hover { background: #c3d6f3; }

/* ---------- Feature tree ---------- */
#tree { padding: 6px 0; user-select: none; }
.tn {
  display: flex; align-items: center; gap: 5px; padding: 2px 6px; height: 22px; cursor: default; white-space: nowrap;
  border: 1px solid transparent;
}
.tn:hover { background: var(--hover); }
/* 3D sketch */
.s3-tools { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.s3-tool { display: flex; align-items: center; gap: 6px; padding: 4px 6px; border: 1px solid var(--border-soft, #d8dee6); background: #fff; border-radius: 4px; font: inherit; font-size: 12px; cursor: pointer; }
.s3-tool svg { width: 18px; height: 18px; }
.s3-tool.active { background: #e3edfb; border-color: #8fb3e8; }
.s3-planes { display: flex; gap: 4px; margin-bottom: 6px; }
.s3-plane { flex: 1; padding: 4px 0; border: 1px solid var(--border-soft, #d8dee6); border-bottom-width: 3px; background: #fff; border-radius: 4px; font: inherit; font-weight: 600; cursor: pointer; }
.s3-plane.active { background: #e3edfb; }
.s3-xyz { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 4px; margin-bottom: 4px; }
.s3-xyz input { min-width: 0; padding: 3px 5px; border: 1px solid var(--border-soft, #d0d7e0); border-radius: 3px; font: inherit; }
.s3-xyz input.bad, .s3-input input.bad { border-color: #c62828; background: #fff3f3; }
.s3-rels { display: flex; flex-wrap: wrap; gap: 4px; margin: 4px 0; }
.li .li-x { margin-left: auto; border: none; background: none; color: #9aa1ab; cursor: pointer; font-size: 14px; }
.li .li-x:hover { color: #c62828; }
.s3-dim, .s3-rel { position: absolute; transform: translate(-50%, -50%); pointer-events: auto; white-space: nowrap; font-size: 11.5px; }
.s3-dim { background: #fff; border: 1px solid #1d4ed8; color: #1d4ed8; padding: 0 5px; border-radius: 3px; cursor: default; }
.s3-rel { background: #fff8db; border: 1px solid #c9a227; color: #6b5300; min-width: 14px; height: 15px; line-height: 13px; text-align: center; padding: 0 2px; border-radius: 3px; font-weight: 600; }
.s3-toolnote { padding: 6px 12px 2px; }
/* Configurations tab */
#configs { padding: 4px 0; user-select: none; }
.cfg-head { display: flex; align-items: center; gap: 6px; padding: 6px 10px; }
.cfg-head svg { width: 18px; height: 18px; }
.cfg-bar { display: flex; gap: 6px; padding: 0 10px 6px; flex-wrap: wrap; }
.tn.cfg-item .tsub { overflow: hidden; text-overflow: ellipsis; max-width: 60%; }
.tn.cfg-active .tl { font-weight: 600; }
/* assemblies */
table.bom { border-collapse: collapse; width: 100%; font-size: 12.5px; }
table.bom th, table.bom td { border: 1px solid var(--border-soft, #d8dee6); padding: 3px 8px; text-align: left; }
table.bom th { background: #f1f5f9; font-weight: 600; }
.s3-axis { position: absolute; transform: translate(-50%, -50%); font-weight: 700; font-size: 12px; pointer-events: none; text-shadow: 0 0 2px #fff, 0 0 3px #fff; }
.s3-props { font-size: 12px; line-height: 1.55; margin: 4px 0; }
.s3-coords { grid-template-columns: 1fr 1fr 1fr; }
.s3-coord { display: flex; align-items: center; gap: 3px; }
.s3-coord span { font-weight: 600; color: #475569; }
.s3-coord input { min-width: 0; width: 100%; }
.s3-input { position: absolute; transform: translate(-50%, -50%); display: flex; align-items: center; gap: 3px; background: #fff; border: 1px solid #1d4ed8; border-radius: 4px; padding: 2px 5px; box-shadow: 0 3px 10px rgba(0,0,0,.18); pointer-events: auto; z-index: 5; }
.s3-input input { width: 70px; font: inherit; padding: 1px 3px; border: 1px solid #c3cfdf; border-radius: 3px; }
/* the visibility column at the right of the tree */
#tree .tn { position: relative; padding-right: 30px; }
.tn .tvis { position: absolute; right: 0; top: -1px; bottom: -1px; width: 26px; display: grid; place-items: center; border-left: 1px solid var(--border-soft, #e3e7ec); background: rgba(240, 243, 247, .55); }
.tn .tvis svg { width: 15px; height: 15px; }
.tn .tvis.on, .tn .tvis.off { cursor: pointer; }
.tn .tvis.on:hover, .tn .tvis.off:hover { background: #dbe7f7; }
.tn .tvis.off svg { opacity: .9; }
.tn.selected { background: var(--accent-weak); border-color: #a9c6ef; }
.tn.editing { background: #fff6d6; border-color: #e8cf7c; }
.tn .tw { width: 12px; height: 12px; display: inline-grid; place-items: center; color: var(--muted); font-size: 9px; flex: none; }
.tn .ti { width: 16px; height: 16px; flex: none; display: inline-grid; place-items: center; }
.tn .ti svg { width: 16px; height: 16px; }
.tn .tl { overflow: hidden; text-overflow: ellipsis; }
.tn .terr { color: var(--danger); font-weight: 700; margin-left: 2px; }
.tn.suppressed .tl { color: #9aa1ab; font-style: italic; }
.tn.suppressed .ti { opacity: .45; }
.tn.hidden-item .ti { opacity: .4; }
.tn.hidden-item .tl { color: #6b7280; }
.tn input.rename { font: inherit; width: 150px; padding: 0 3px; border: 1px solid var(--accent); }
.tree-part { font-weight: 600; }
.tree-sep { height: 1px; background: var(--border-soft); margin: 4px 8px; }

/* ---------- Property panel ---------- */
#pm { padding: 0 0 10px; }
.pm-head { display: flex; align-items: center; gap: 6px; padding: 8px 8px 6px; font-weight: 600; font-size: 13px; }
.pm-head .ti svg { width: 20px; height: 20px; }
.pm-actions { display: flex; gap: 6px; padding: 0 8px 8px; }
.pm-actions button {
  width: 30px; height: 26px; border: 1px solid var(--border); background: var(--panel2); border-radius: 3px; display: grid; place-items: center; cursor: pointer;
}
.pm-actions button:hover { background: var(--hover); }
.pm-actions button svg { width: 18px; height: 18px; }
.pm-msg { margin: 0 8px 8px; padding: 6px 8px; background: #fff8dc; border: 1px solid #ecd98d; border-radius: 3px; line-height: 1.35; }
.pm-msg.err { background: #fdecea; border-color: #f2b8b5; color: #8e1c1c; }
.pm-group { margin: 0 6px 8px; border: 1px solid var(--border-soft); border-radius: 3px; background: var(--panel2); }
.pm-group > .pm-gt {
  display: flex; align-items: center; gap: 6px; padding: 5px 8px; font-weight: 600; background: var(--panel); border-bottom: 1px solid var(--border-soft); cursor: default; user-select: none;
}
.pm-group > .pm-gt .caret { font-size: 9px; color: var(--muted); width: 10px; }
.pm-group.collapsed > .pm-gb { display: none; }
.pm-gb { padding: 6px 8px; display: grid; gap: 6px; }
.pm-row { display: grid; grid-template-columns: 92px 1fr; align-items: center; gap: 6px; }
.pm-row label { color: var(--muted); }
.pm-row.check { grid-template-columns: 1fr; }
.pm-row.check label { color: var(--text); display: flex; align-items: center; gap: 6px; }
.pm-input { position: relative; display: flex; align-items: center; }
.pm-input input[type=text], .pm-input select, .pm-input input[type=number] {
  width: 100%; height: 24px; padding: 2px 6px; border: 1px solid var(--border); border-radius: 2px; background: #fff;
}
.pm-input input:focus, .pm-input select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-weak); }
.pm-input input.bad { border-color: var(--danger); background: #fff5f5; }
.pm-input .unit { position: absolute; right: 6px; color: var(--muted); pointer-events: none; font-size: 11px; }
.pm-input .val { position: absolute; right: 26px; color: #2c7a3f; pointer-events: none; font-size: 11px; }
.pm-list { border: 1px solid var(--border); border-radius: 2px; max-height: 150px; overflow: auto; background: #fff; }
.pm-list .li { padding: 3px 6px; display: flex; gap: 6px; align-items: center; cursor: default; }
.pm-list .li:hover { background: var(--hover); }
.pm-list .li.sel { background: var(--accent-weak); }
.pm-list .li svg { width: 14px; height: 14px; }
.pm-pts { display: grid; grid-template-columns: 22px 1fr 1fr; gap: 4px; align-items: center; }
.pm-pts input { width: 100%; height: 22px; border: 1px solid var(--border); padding: 1px 4px; }
.pm-hint { color: var(--muted); line-height: 1.35; }
.pm-btn { height: 26px; border: 1px solid var(--border); background: var(--panel); border-radius: 3px; cursor: pointer; padding: 0 10px; }
.pm-btn:hover { background: var(--hover); }

/* ---------- Drawings ---------- */
#drawing { position: relative; overflow: hidden; min-width: 0; display: flex; flex-direction: column; background: #8d97a5; }
#drawing[hidden] { display: none; }
#dw-svg { flex: 1; width: 100%; min-height: 0; display: block; cursor: default; user-select: none; }
#dw-sheets { flex: none; display: flex; gap: 2px; padding: 3px 8px 0; background: var(--panel, #f3f5f8); border-top: 1px solid var(--border, #c9d0d8); height: 26px; box-sizing: border-box; }
.dw-sheet { border: 1px solid var(--border, #c9d0d8); border-bottom: 0; background: #e3e8ee; border-radius: 4px 4px 0 0; padding: 2px 12px; font: inherit; font-size: 12px; cursor: pointer; }
.dw-sheet.active { background: #fff; font-weight: 600; }
.dw-sheet.add { padding: 2px 8px; }
.dw-orients { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; }
.dw-orients .pm-btn { height: auto; min-height: 26px; padding: 3px 4px; line-height: 1.2; white-space: normal; overflow-wrap: anywhere; }
.dw-orients .pm-btn.wide { grid-column: 1 / -1; }
.dw-rot { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; }
.dw-rot .pm-btn { padding: 0 2px; }
.dw-orients .pm-btn.on, .pm-btn.on { background: var(--accent-weak, #dbe8fb); border-color: var(--accent, #1f6fd6); }
.dw-form { min-width: 380px; }
.dw-form .kv input, .dw-form .kv select { width: 100%; box-sizing: border-box; }
.s-scale-row { display: flex; align-items: center; gap: 6px; }
.s-scale-row input { width: 70px; }
/* (a muted tree row: its own class, as .dim is a sketch dimension's floating label) */
#tree .tn.tree-muted .tl { color: var(--muted, #6b7280); }
#cm-tabs .cm-tab-claude { display: inline-flex; align-items: center; gap: 4px; }
#cm-tabs .cm-tab-claude svg { width: 14px; height: 14px; }
.tn.tree-same .tsub { color: #1f6fd6; font-weight: 600; }

/* ---------- Viewport ---------- */
#viewport {
  position: relative; overflow: hidden; min-width: 0;
  background: linear-gradient(180deg, #c5d3e2 0%, #eef2f6 55%, #ffffff 100%);
}
#c { position: absolute; inset: 0; width: 100%; height: 100%; display: block; outline: none; }
#labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.plabel {
  position: absolute; transform: translate(-50%, -50%); font-size: 11px; color: #44506a; white-space: nowrap;
  background: rgba(255,255,255,.6); padding: 0 3px; border-radius: 2px;
}
.dim {
  position: absolute; transform: translate(-50%, -50%); pointer-events: auto; cursor: pointer;
  font-size: 12px; color: #0d3b9e; background: rgba(255,255,255,.88); border: 1px solid #b6c6e6;
  padding: 0 4px; border-radius: 2px; white-space: nowrap; user-select: none;
}
.dim:hover { border-color: var(--accent); background: #fff; color: #000; }
.dim.driven { color: #6a7385; border-style: dashed; }
.dim.selected { border-color: var(--accent); background: #e0efff; }
.dim.preview { opacity: .75; pointer-events: none; }
.rel {
  position: absolute; transform: translate(-50%, -50%); pointer-events: auto; cursor: pointer;
  min-width: 15px; height: 15px; padding: 0 2px; display: grid; place-items: center;
  font: 600 10px/1 "Segoe UI", sans-serif; color: #fff; background: #3d8b3d; border: 1px solid #2c6b2c; border-radius: 2px;
  user-select: none;
}
.rel:hover { background: #f59e0b; border-color: #b45309; }
.rel.selected { background: #0ea5e9; border-color: #0369a1; }
/* DXF export preview */
.modal.modal-wide { width: min(1180px, 96vw); max-width: 96vw; }
.dxf-prev { display: flex; gap: 14px; align-items: flex-start; }
.dxf-left { flex: 0 0 auto; display: flex; flex-direction: column; gap: 6px; }
.dxf-canvas { width: 640px; height: 400px; max-width: 56vw; border-radius: 4px; background: #1b1f24; outline: none; touch-action: none; }
.dxf-canvas:focus-visible { box-shadow: 0 0 0 2px #38bdf8; }
.dxf-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; max-width: 640px; }
.dxf-bar select { max-width: 130px; }
.dxf-selinfo { min-width: 92px; font-weight: 600; }
.dxf-lab { color: var(--muted, #6b7280); margin-left: 4px; }
.dxf-ctrl { flex: 1 1 auto; min-width: 400px; max-height: 520px; overflow: auto; }
.dxf-layers td, .dxf-layers th { padding: 2px 4px; white-space: nowrap; }
.dxf-layers select { max-width: 150px; }
.dxf-sw { display: inline-block; width: 12px; height: 12px; border: 1px solid #596273; vertical-align: middle; margin-right: 4px; }
.dxf-opt { display: block; margin: 3px 0; }
/* gear numbers in a sketch (labels only) */
.gear-num {
  position: absolute; transform: translate(-50%, -50%); pointer-events: none;
  min-width: 18px; height: 18px; padding: 0 4px; display: grid; place-items: center; border-radius: 9px;
  font: 700 11px/1 "Segoe UI", sans-serif; color: #fff; background: #334155; border: 1px solid #1e293b;
  user-select: none;
}
.gear-num.selected { background: #0ea5e9; border-color: #0369a1; }
.gear-num.bad { background: #dc2626; border-color: #991b1b; }
.pm-rels { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.pm-rels button {
  display: flex; align-items: center; gap: 6px; height: 26px; padding: 0 6px; border: 1px solid var(--border);
  background: var(--panel2); border-radius: 3px; cursor: pointer; text-align: left;
}
.pm-rels button:hover { background: var(--hover); border-color: #9cbcea; }
.pm-rels .g, .pm-list .g {
  min-width: 16px; height: 16px; display: inline-grid; place-items: center; font: 600 10px/1 "Segoe UI", sans-serif;
  color: #fff; background: #3d8b3d; border-radius: 2px; padding: 0 2px;
}
.pm-list .li .x { margin-left: auto; color: var(--muted); padding: 0 4px; border-radius: 2px; }
.pm-list .li .x:hover { background: #fde2e2; color: var(--danger); }
.pm-msg.ok { background: #e8f5e9; border-color: #a5d6a7; color: #1b5e20; }
.dim .sig { color: #b05800; font-weight: 600; margin-right: 2px; }
.modify {
  position: absolute; z-index: 20; pointer-events: auto; background: var(--panel2); border: 1px solid var(--border);
  box-shadow: 0 6px 18px rgba(20,30,45,.2); border-radius: 3px; padding: 6px; width: 190px;
}
.modify .mh { font-weight: 600; margin-bottom: 5px; display: flex; align-items: center; gap: 4px; }
.modify .mh span { flex: 1; }
.modify .mh button { width: 22px; height: 20px; border: 1px solid var(--border); background: var(--panel2); cursor: pointer; border-radius: 2px; padding: 0; }
.modify input { width: 100%; height: 24px; border: 1px solid var(--accent); padding: 2px 6px; }
.modify .merr { color: var(--danger); font-size: 11px; margin-top: 3px; min-height: 13px; }
.snapmark { position: absolute; width: 10px; height: 10px; border: 2px solid #f59e0b; transform: translate(-50%, -50%); pointer-events: none; }
.cursor-tip {
  position: absolute; pointer-events: none; font-size: 11px; color: #0d3b9e; background: rgba(255,255,255,.9);
  border: 1px solid #c6d2ea; padding: 0 4px; border-radius: 2px; transform: translate(14px, 12px); white-space: nowrap;
}

#hud {
  position: absolute; top: 8px; left: 50%; transform: translateX(-50%); display: flex; gap: 1px; padding: 2px;
  background: rgba(255,255,255,.75); border: 1px solid rgba(160,172,190,.6); border-radius: 4px; backdrop-filter: blur(3px);
}
#hud button {
  width: 30px; height: 28px; border: 1px solid transparent; background: none; border-radius: 3px; display: grid; place-items: center; cursor: default; position: relative;
}
#hud button svg { width: 20px; height: 20px; }
#hud button:hover { background: var(--hover); border-color: #b9d0f2; }
#hud button.on { background: var(--accent-weak); border-color: #8fb4ea; }
#hud button.drop::after { content: ""; position: absolute; right: 2px; bottom: 3px; border: 3px solid transparent; border-top-color: #556; }
#hud .hsep { width: 1px; background: rgba(160,172,190,.6); margin: 3px 2px; }

#claude-panel {
  position: absolute; right: 10px; bottom: 10px; width: 380px; max-width: calc(100% - 20px); height: min(520px, calc(100% - 20px));
  display: flex; flex-direction: column; background: #fff; border: 1px solid #c3cad4; border-radius: 6px;
  box-shadow: 0 6px 24px rgba(20, 30, 50, .22); z-index: 30; font-size: 12.5px;
}
#claude-panel[hidden] { display: none; }
#claude-panel .cl-h { display: flex; align-items: center; gap: 6px; padding: 5px 6px 5px 8px; border-bottom: 1px solid #e3e7ed; background: #f5f7fa; border-radius: 6px 6px 0 0; }
#claude-panel .cl-title { white-space: nowrap; display: flex; align-items: center; gap: 5px; font-weight: 600; flex: 1; }
#claude-panel .cl-title svg { width: 18px; height: 18px; }
#claude-panel .cl-model select { font-size: 11.5px; max-width: 150px; }
#claude-panel .cl-h button { border: 1px solid transparent; background: none; border-radius: 4px; cursor: pointer; padding: 2px 5px; font-size: 11.5px; }
#claude-panel .cl-h button:hover { border-color: #c3cad4; background: #fff; }
#claude-panel .cl-set svg { width: 16px; height: 16px; display: block; }
#claude-panel .cl-log { flex: 1; overflow-y: auto; padding: 8px; display: flex; flex-direction: column; gap: 7px; user-select: text; }
#claude-panel .cl-m { line-height: 1.4; }
#claude-panel .cl-m b { display: block; font-size: 11px; color: #5b6575; margin-bottom: 1px; }
#claude-panel .cl-you > div { background: #e8eefc; border-radius: 6px; padding: 5px 8px; }
#claude-panel .cl-claude > div { background: #f3f4f6; border-radius: 6px; padding: 5px 8px; }
#claude-panel .cl-note { color: #4b5563; font-size: 11.5px; font-style: italic; }
#claude-panel .cl-error { color: #b91c1c; font-size: 11.5px; }
#claude-panel .cl-busy { color: #4b5563; font-size: 11.5px; }
#claude-panel .cl-busy::after { content: ''; display: inline-block; width: 10px; height: 10px; margin-left: 6px; border: 2px solid #94a3b8; border-top-color: transparent; border-radius: 50%; animation: cl-spin .8s linear infinite; vertical-align: -1px; }
@keyframes cl-spin { to { transform: rotate(360deg); } }
#claude-panel .cl-in { display: flex; gap: 6px; padding: 6px; border-top: 1px solid #e3e7ed; align-items: stretch; }
#claude-panel textarea { flex: 1; resize: none; font: inherit; padding: 5px 6px; border: 1px solid #c3cad4; border-radius: 4px; }
#claude-panel.busy .cl-send { opacity: .5; pointer-events: none; }
.claude-set .kv input, .claude-set .kv select { width: 100%; box-sizing: border-box; }
.claude-set { min-width: 420px; max-width: 520px; display: flex; flex-direction: column; gap: 8px; }
.claude-set [hidden] { display: none !important; }
.claude-set .cl-backend { display: flex; flex-direction: column; gap: 4px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.claude-set .cl-backend label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.claude-set .cl-sub-opts, .claude-set .cl-api-opts { display: flex; flex-direction: column; gap: 6px; }
.claude-set .cl-clistate { word-break: break-all; }
.claude-set .cl-clistate code { word-break: normal; }
.claude-set .cl-cli-btns { display: flex; gap: 6px; margin-top: 4px; }
#confirm-corner { position: absolute; top: 8px; right: 10px; display: flex; flex-direction: column; gap: 4px; }
#confirm-corner button {
  width: 38px; height: 38px; border: 1px solid var(--border); background: rgba(255,255,255,.85); border-radius: 4px; display: grid; place-items: center; cursor: pointer;
}
#confirm-corner button:hover { background: #fff; border-color: var(--accent); }
#confirm-corner button svg { width: 26px; height: 26px; }
#vp-banner {
  position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); background: rgba(38,48,60,.86); color: #fff;
  padding: 6px 14px; border-radius: 14px; font-size: 12px; pointer-events: none;
}

/* ---------- Status bar ---------- */
#statusbar { display: flex; align-items: center; gap: 14px; padding: 0 10px; background: var(--panel); border-top: 1px solid var(--border); color: var(--muted); font-size: 11px; }
#statusbar .spacer { flex: 1; }
#status-units { color: var(--text); }

/* ---------- Modal ---------- */
.modal-back { position: fixed; inset: 0; background: rgba(20,28,40,.28); z-index: 2000; display: grid; place-items: center; }
.modal { background: var(--panel2); border: 1px solid var(--border); border-radius: 4px; box-shadow: 0 16px 40px rgba(0,0,0,.25); min-width: 380px; max-width: 92vw; max-height: 86vh; display: flex; flex-direction: column; }
.modal-h { display: flex; align-items: center; gap: 8px; padding: 8px 12px; background: var(--panel); border-bottom: 1px solid var(--border); font-weight: 600; }
.modal-h svg { width: 18px; height: 18px; }
.modal-h .x { margin-left: auto; border: 0; background: none; font-size: 16px; cursor: pointer; color: var(--muted); }
.modal-b { padding: 12px; overflow: auto; }
.modal-f { display: flex; justify-content: flex-end; gap: 8px; padding: 8px 12px; border-top: 1px solid var(--border-soft); }
.modal-f button { min-width: 76px; height: 26px; border: 1px solid var(--border); background: var(--panel); border-radius: 3px; cursor: pointer; }
.modal-f button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
table.grid { border-collapse: collapse; width: 100%; }
table.grid th, table.grid td { border: 1px solid var(--border-soft); padding: 3px 6px; text-align: left; }
table.grid th { background: var(--panel); font-weight: 600; }
table.grid input { width: 100%; border: 1px solid transparent; padding: 2px 4px; height: 22px; }
table.grid input:focus { border-color: var(--accent); outline: none; }
table.grid td.num { text-align: right; font-variant-numeric: tabular-nums; }
table.grid td.err { color: var(--danger); }
.kv { display: grid; grid-template-columns: 160px 1fr; gap: 4px 12px; font-variant-numeric: tabular-nums; }
.kv .k { color: var(--muted); }
.kbd { display: inline-block; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 3px; padding: 0 5px; background: var(--panel); font-size: 11px; }

#toast {
  position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%); background: #26303c; color: #fff;
  padding: 8px 16px; border-radius: 4px; z-index: 3000; box-shadow: 0 6px 18px rgba(0,0,0,.25);
}
#toast.err { background: #a52222; }

.pm-msg.warn { background: #fff1e0; border-color: #f0b46a; color: #8a4b00; }

/* ---------- Modify box: arc condition ---------- */
.modify .mcond { display: flex; gap: 3px; margin-top: 5px; }
.modify .mcond button { flex: 1; height: 22px; border: 1px solid var(--border); background: var(--panel); border-radius: 3px; cursor: pointer; font-size: 11px; }
.modify .mcond button.on { background: var(--accent-weak); border-color: var(--accent); font-weight: 600; }

/* ---------- Mates (Move/Copy Body) ---------- */
.mate { border: 1px solid var(--border-soft); border-radius: 4px; padding: 6px; margin: 0 0 6px; background: var(--panel2); }
.mate-h { display: flex; gap: 6px; align-items: center; margin-bottom: 5px; }
.mate-h select { flex: 1; height: 24px; }
.mate-n { width: 18px; height: 18px; border-radius: 50%; background: var(--accent-weak); color: var(--accent); display: grid; place-items: center; font-weight: 700; font-size: 11px; }
.mate .slot { display: flex; width: 100%; gap: 6px; align-items: center; text-align: left; height: 26px; margin: 0 0 4px; padding: 0 6px; border: 1px dashed var(--border); background: #fff; border-radius: 3px; cursor: pointer; }
.mate .slot .k { color: var(--muted); width: 52px; flex: none; }
.mate .slot.set { border-style: solid; }
.mate .slot.active { border: 1px solid var(--accent); background: var(--accent-weak); }
.mate .mate-flip { display: flex; align-items: center; gap: 4px; color: var(--muted); }

/* ---------- Start window ---------- */
.start-back .modal { width: min(860px, 94vw); }
.start-back .modal-f { display: none; }
.start { display: grid; grid-template-columns: 250px 1fr; gap: 18px; min-height: 340px; }
.start-l { display: flex; flex-direction: column; gap: 8px; }
.start-btn { display: flex; align-items: center; gap: 10px; text-align: left; padding: 9px 10px; border: 1px solid var(--border); border-radius: 5px; background: var(--panel); cursor: pointer; }
.start-btn:hover { background: var(--hover); border-color: #a9c6ef; }
.start-btn svg { width: 30px; height: 30px; flex: none; }
.start-btn span { display: flex; flex-direction: column; }
.start-btn small { color: var(--muted); font-size: 11px; }
.start-btn.primary { border-color: var(--accent); background: var(--accent-weak); }
.start-btn.warn { border-color: #f0b46a; background: #fff6ea; }
.start-note { margin-top: auto; }
.start-h { font-weight: 600; font-size: 13px; margin-bottom: 6px; }
.start-list { border: 1px solid var(--border-soft); border-radius: 5px; max-height: 420px; overflow: auto; }
.start-item { display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-bottom: 1px solid var(--border-soft); cursor: pointer; }
.start-item:last-child { border-bottom: 0; }
.start-item:hover { background: var(--hover); }
.start-item svg { width: 24px; height: 24px; flex: none; }
.start-item .si-t { flex: 1; min-width: 0; }
/* New Drawing set-up */
.nd { display: flex; gap: 16px; align-items: stretch; min-height: 380px; }
.nd-list { flex: 1 1 300px; max-height: 62vh; overflow: auto; border: 1px solid var(--border-soft); border-radius: 6px; padding: 4px 0; }
.nd-list .bp-sec { margin: 8px 10px 4px; }
.nd-item { display: flex; align-items: center; gap: 10px; padding: 6px 10px; cursor: pointer; }
.nd-item:hover { background: var(--hover); }
.nd-item.active { background: #e0f2fe; box-shadow: inset 3px 0 0 #0ea5e9; }
.nd-thumb { width: 56px; height: 40px; flex: none; object-fit: contain; border: 1px solid var(--border-soft); border-radius: 3px; background: #fff; }
.nd-noth { display: flex; align-items: center; justify-content: center; }
.nd-noth svg { width: 22px; height: 22px; opacity: 0.7; }
.nd-t { display: flex; flex-direction: column; min-width: 0; }
.nd-t small { color: var(--muted); font-size: 11px; }
.nd-badge { font-size: 10px; font-weight: 600; color: #0369a1; background: #e0f2fe; border: 1px solid #7dd3fc; border-radius: 3px; padding: 0 4px; }
.nd-row { display: flex; gap: 6px; padding: 6px 10px; flex-wrap: wrap; }
.nd-empty { padding: 2px 12px 4px; }
.nd-form { flex: 1 1 320px; display: flex; flex-direction: column; gap: 6px; }
.nd-tname { font-weight: 600; font-size: 14px; }
.nd-def { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.start-item .si-thumb { width: 64px; height: 48px; flex: none; object-fit: contain; border-radius: 4px; background: #eef2f6; border: 1px solid var(--border-soft); }
.start-item .si-noth { display: flex; align-items: center; justify-content: center; }
.start-item .si-noth svg { width: 24px; height: 24px; opacity: 0.7; }
.start-item .si-n { font-weight: 600; }
.start-item .si-f { color: var(--muted); font-size: 11px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.start-item .si-d { color: var(--muted); font-size: 11px; white-space: nowrap; }
.start-item .si-badge { margin-left: 6px; font-size: 10px; font-weight: 600; color: #8a4b00; background: #fff1e0; border: 1px solid #f0b46a; border-radius: 3px; padding: 0 4px; }
.start-item .si-x { border: 0; background: none; color: var(--muted); cursor: pointer; padding: 2px 4px; visibility: hidden; }
.start-item:hover .si-x { visibility: visible; }
.start-item.missing { cursor: default; opacity: .55; }

/* ---------- Progress (status bar, bottom left) ---------- */
#progress { display: inline-flex; align-items: center; gap: 8px; margin-right: 12px; }
#progress[hidden] { display: none; }
#progress .pg-stop { border: 1px solid #c62828; background: #fff; color: #c62828; border-radius: 3px; padding: 0 8px; height: 18px; font-size: 11px; cursor: pointer; }
#progress .pg-stop:hover { background: #c62828; color: #fff; }
#progress .pg-stop[hidden] { display: none; }
#busy-banner { position: absolute; top: 10px; left: 50%; transform: translateX(-50%); z-index: 30; display: flex; align-items: center; gap: 10px; padding: 7px 10px 7px 14px; background: #fff8e1; border: 1px solid #e0a800; border-radius: 6px; box-shadow: 0 4px 14px rgba(0,0,0,.15); font-size: 12.5px; }
#busy-banner button { border: 1px solid #c62828; background: #c62828; color: #fff; border-radius: 4px; padding: 3px 12px; cursor: pointer; font-weight: 600; }
#progress .pg-label { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#progress .pg-bar { position: relative; width: 160px; height: 9px; border: 1px solid var(--border); border-radius: 5px; background: #fff; overflow: hidden; }
#progress .pg-fill { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--accent); transition: width .15s; }
#progress.indet .pg-fill { width: 35% !important; animation: pg-slide 1.1s ease-in-out infinite; transition: none; }
@keyframes pg-slide { from { left: -35%; } to { left: 100%; } }

.start-recover { border: 1px solid #f0b46a; background: #fff6ea; border-radius: 5px; padding: 8px 10px; margin-bottom: 12px; }
.start-recover .sr-h { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 6px; }
.start-recover .sr-h svg { width: 22px; height: 22px; flex: none; }
.start-recover small { color: #8a4b00; }
.start-recover .sr-row { display: flex; gap: 6px; align-items: center; padding: 3px 0; }
.start-recover .sr-n { flex: 1; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pm-btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ---------- Bodies ---------- */
.tn .tsub { color: var(--muted); margin-left: 6px; font-size: 11px; white-space: nowrap; }
.bodyprops { min-width: 460px; }
.bodyprops .bp-sec { font-weight: 600; margin: 12px 0 6px; padding-bottom: 3px; border-bottom: 1px solid var(--border-soft); }
.bodyprops .bp-sec:first-child { margin-top: 0; }
.bodyprops .bp-kv input, .bodyprops .bp-kv select { width: 100%; height: 24px; padding: 0 4px; border: 1px solid var(--border); border-radius: 3px; background: #fff; }
.bodyprops .bp-kv { align-items: center; }
.modal .bp-sec { font-weight: 600; margin: 12px 0 6px; }
#hud button:disabled { opacity: .35; cursor: default; }

/* ---------- Sketch tool wheel (middle-button hold) ---------- */
.toolwheel { position: fixed; width: 0; height: 0; z-index: 60; pointer-events: none; }
.tw-ring {
  position: absolute; left: -128px; top: -128px; width: 256px; height: 256px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.0) 0 30px, rgba(245,246,248,.93) 31px 127px);
  border: 1px solid var(--border); box-shadow: 0 6px 22px rgba(0,0,0,.22);
  animation: tw-in .09s ease-out;
}
.tw-item {
  position: absolute; width: 40px; height: 40px; margin: -20px 0 0 -20px; padding: 6px; border-radius: 50%;
  background: var(--panel2); border: 1px solid var(--border-soft);
  transition: transform .06s, background .06s, border-color .06s;
}
.tw-item svg { width: 100%; height: 100%; display: block; }
.tw-item.current { border-color: var(--accent); }
.tw-item.hot { background: var(--accent-weak); border: 2px solid var(--accent); transform: scale(1.22); }
.tw-center {
  position: absolute; left: -29px; top: -29px; width: 58px; height: 58px; border-radius: 50%;
  display: grid; place-items: center; text-align: center;
  background: var(--panel2); border: 1px solid var(--border);
}
.tw-label { font-size: 10px; line-height: 1.15; font-weight: 600; color: var(--text); padding: 0 3px; }
.toolwheel.idle .tw-label { color: var(--muted); font-weight: 400; }
@keyframes tw-in { from { transform: scale(.85); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* feature tree editing: rollback bar, drag and drop, reference arrows, rolled-back features */
#tree { position: relative; }
.tn.rolled .tl { color: #a3a9b3; }
.tn.rolled .ti { opacity: .35; }
.tn.dragging { opacity: .45; }
.rollback-bar { height: 9px; margin: 2px 6px; cursor: ns-resize; display: flex; align-items: center; }
.rollback-bar span { flex: 1; height: 3px; border-radius: 2px; background: #1d4ed8; box-shadow: 0 0 0 1px #fff; }
.rollback-bar:hover span { background: #2563eb; height: 4px; }
.drop-line { position: absolute; left: 4px; right: 4px; height: 2px; background: #f59e0b; pointer-events: none; z-index: 3; }
svg.ref-arrows { position: absolute; left: 0; top: 0; pointer-events: none; z-index: 2; }
.tn.tree-folder .tl { font-weight: 500; }

/* quick Save / Save As / Rebuild buttons next to the menus */
.mb-quick { display: flex; gap: 2px; margin-left: 8px; padding-left: 8px; border-left: 1px solid rgba(255,255,255,.18); }
#menubar .mb-quick button { padding: 2px 4px; display: grid; place-items: center; }
.mb-quick svg { width: 18px; height: 18px; }

/* part tabs in the title bar */
#doc-title.doctabs { display: flex; align-items: flex-end; justify-content: center; gap: 2px; height: 30px; overflow: hidden; text-align: left; }
.doctab { display: flex; align-items: center; gap: 5px; max-width: 220px; height: 25px; padding: 0 4px 0 8px; border-radius: 6px 6px 0 0; background: rgba(255,255,255,.08); color: #c9d2dc; cursor: default; font-size: 12px; }
.doctab:hover { background: rgba(255,255,255,.14); }
.doctab.active { background: var(--panel, #f3f5f8); color: #1d2430; }
.doctab svg { width: 15px; height: 15px; flex: none; }
.doctab span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doctab-x { border: 0; background: none; color: inherit; opacity: .55; width: 18px; height: 18px; border-radius: 3px; font-size: 10px; cursor: pointer; flex: none; }
.doctab-x:hover { opacity: 1; background: rgba(0,0,0,.12); }
.doctab-new { border: 0; background: none; color: #c9d2dc; width: 24px; height: 24px; border-radius: 4px; font-size: 16px; cursor: pointer; align-self: center; }
.doctab-new:hover { background: rgba(255,255,255,.14); }

/* visibility drop-down */
.vis-h { padding: 6px 10px 2px; font-size: 11px; color: var(--muted); }
.vis-row { display: flex; align-items: center; gap: 8px; cursor: default; }
.vis-row input { margin: 0 2px 0 4px; }
.vis-all { display: flex; gap: 6px; padding: 4px 10px; }
.vis-all .pm-btn { flex: 1; }

/* banner button (Exit Isolate, Done) */
#vp-banner button { pointer-events: auto; margin-left: 8px; border: 0; border-radius: 10px; padding: 2px 10px; background: #fff; color: #1d2430; font-size: 11px; cursor: pointer; }
#vp-banner button:hover { background: #fde68a; }

/* measure */
.measure-label { position: absolute; transform: translate(-50%, -130%); background: #d97706; color: #fff; font-size: 12px; font-weight: 600; padding: 2px 7px; border-radius: 4px; pointer-events: none; white-space: nowrap; box-shadow: 0 1px 3px rgba(0,0,0,.25); }
.measure-kv b { color: #92400e; }
/* quick readout of the selected edges' / sketch curves' size */
.dim-tag { position: absolute; transform: translate(14px, -50%); background: rgba(29, 36, 48, 0.92); color: #fff; font-size: 11.5px; line-height: 1.35; padding: 3px 8px; border-radius: 4px; pointer-events: none; white-space: nowrap; box-shadow: 0 1px 4px rgba(0,0,0,.3); z-index: 3; }
.dim-tag b { font-weight: 600; }
.dim-tag .sub { opacity: 0.72; }

/* shortcut key in the bottom-right corner of a toolbar icon */
.cm-ic { position: relative; display: inline-block; width: var(--cm-ic); height: var(--cm-ic); flex: none; }
#commandmanager.cm-small .cm-key { font-size: 8px; line-height: 10px; min-width: 9px; right: -4px; bottom: -2px; }
.cm-key { position: absolute; right: -6px; bottom: -3px; min-width: 11px; padding: 0 2px; border-radius: 3px; background: #1d2430; color: #fff; font-size: 9px; font-weight: 600; line-height: 12px; text-align: center; box-shadow: 0 0 0 1px #fff; }

/* toolbar customisation */
.cm-btn.cm-dragging, .cm-sep.cm-dragging { opacity: .25; }
.cm-ghost { position: fixed; z-index: 9999; pointer-events: none; opacity: .92; background: var(--panel, #fff); border: 1px solid #8fb4ea; border-radius: 4px; box-shadow: 0 6px 18px rgba(0,0,0,.18); display: flex; flex-direction: column; align-items: center; }
.cm-ghost.cm-ghost-remove { opacity: .55; border-color: #c62828; box-shadow: 0 6px 18px rgba(198,40,40,.25); }
#cm-tabs button.cm-drop { background: var(--accent-weak, #dbeafe); color: var(--text); outline: 2px dashed #2563eb; outline-offset: -3px; }
#cm-tabs button.cm-tab-custom { font-style: italic; }
#cm-tabs .cm-tab-add { font-weight: 600; min-width: 28px; }
#cm-buttons .cm-empty { align-self: center; padding: 0 12px; color: var(--muted, #667); font-size: 12px; grid-row: 1 / span 2; white-space: nowrap; }
.tb-cust { width: 520px; max-width: 80vw; }
.tb-cust-top { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; margin-bottom: 6px; }
.tb-cust-top select { flex: 1; min-width: 160px; }
.tb-cust-list { max-height: 52vh; overflow: auto; border: 1px solid var(--border-soft, #dde3ea); border-radius: 4px; margin-top: 6px; }
.tb-cust-group { position: sticky; top: 0; background: var(--panel, #f4f6f8); font-weight: 600; font-size: 12px; padding: 4px 8px; border-bottom: 1px solid var(--border-soft, #dde3ea); }
.tb-cust-row { display: flex; align-items: center; gap: 8px; padding: 2px 8px; }
.tb-cust-row .ic svg { width: 20px; height: 20px; }
.tb-cust-row .lb { flex: 1; }

/* sheet metal check */
.sm-check { width: 620px; max-width: 86vw; max-height: 70vh; overflow: auto; }
.sm-check-body { margin-bottom: 12px; }
.sm-check-h { margin: 4px 0 6px; }
.sm-check-t { border-collapse: collapse; width: 100%; font-size: 12px; margin-bottom: 6px; }
.sm-check-t th, .sm-check-t td { border: 1px solid var(--border-soft, #dde3ea); padding: 2px 6px; text-align: right; }
.sm-check-t th { background: var(--panel, #f4f6f8); text-align: center; }
.sm-check-t td:first-child, .sm-check-t td:nth-child(2) { text-align: left; }

/* the tree, moved through with the keys */
#tree:focus { outline: none; }
#tree:focus-visible { box-shadow: inset 0 0 0 1px #93c5fd; }
#tree:focus .tn.tree-cursor:not(.selected) { background: rgba(43, 125, 233, 0.10); }

/* motion studies */
.mo-bar { display: flex; gap: 6px; margin: 8px 0 4px; }
.mo-slider { width: 100%; margin: 4px 0; }

/* Getting Started Tour */
#tour { position: fixed; inset: 0; z-index: 70; }
#tour .tour-hole { position: fixed; border-radius: 6px; box-shadow: 0 0 0 9999px rgba(15, 23, 42, 0.45); outline: 2px solid #60a5fa; transition: all .18s ease; pointer-events: none; }
#tour .tour-bubble { position: fixed; background: var(--panel, #fff); border: 1px solid var(--border, #c9ced6); border-radius: 8px; box-shadow: 0 12px 36px rgba(0,0,0,.3); padding: 12px 14px; font-size: 13px; line-height: 1.45; }
#tour .tb-n { color: var(--muted, #6b7280); font-size: 11px; }
#tour .tb-t { font-weight: 700; font-size: 15px; margin: 2px 0 6px; }
#tour .tb-nav { display: flex; gap: 6px; justify-content: flex-end; margin-top: 10px; flex-wrap: wrap; }
#tour .tb-nav button:first-child { margin-right: auto; }
.start-tour { display: flex; align-items: center; gap: 8px; width: 100%; margin-bottom: 8px; padding: 9px 10px; border: 1px solid #93c5fd; background: #eff6ff; border-radius: 6px; cursor: pointer; text-align: left; font-size: 12.5px; }
.start-tour svg { width: 22px; height: 22px; }

/* command search (Ctrl+K) */
#cmd-search { position: fixed; inset: 0; z-index: 60; background: rgba(15, 23, 42, 0.12); display: flex; justify-content: center; align-items: flex-start; padding-top: 12vh; }
#cmd-search .cs-box { width: min(560px, 92vw); background: var(--panel, #fff); border: 1px solid var(--border, #c9ced6); border-radius: 8px; box-shadow: 0 12px 36px rgba(0,0,0,.25); overflow: hidden; }
#cmd-search input { width: 100%; box-sizing: border-box; border: 0; border-bottom: 1px solid var(--border-soft, #e2e6ec); padding: 11px 14px; font-size: 15px; outline: none; background: transparent; }
#cmd-search .cs-list { max-height: 60vh; overflow: auto; padding: 4px 0; }
#cmd-search .cs-row { display: flex; align-items: center; gap: 10px; padding: 6px 14px; cursor: pointer; font-size: 13px; }
#cmd-search .cs-row.on { background: #e8f1fd; }
#cmd-search .cs-ic svg { width: 20px; height: 20px; vertical-align: middle; }
#cmd-search .cs-l { flex: 1; }
#cmd-search .cs-w { color: var(--muted, #6b7280); font-size: 11.5px; white-space: nowrap; }
#cmd-search .cs-none { padding: 10px 14px; color: var(--muted, #6b7280); }

/* Customize Shortcuts */
.sc-edit { width: min(620px, 86vw); }
.sc-edit > input { width: 100%; box-sizing: border-box; padding: 6px 8px; margin-bottom: 6px; }
.sc-list { max-height: 52vh; overflow: auto; border: 1px solid var(--border-soft, #e2e6ec); border-radius: 4px; margin-top: 6px; }
.sc-row { display: flex; align-items: center; gap: 8px; padding: 4px 8px; border-bottom: 1px solid var(--border-soft, #eef0f3); font-size: 12.5px; }
.sc-row .cs-ic svg { width: 18px; height: 18px; vertical-align: middle; }
.sc-row .sc-l { flex: 1; }
.sc-row .sc-l small { color: var(--muted, #6b7280); margin-left: 8px; }
.sc-row .sc-k { min-width: 110px; text-align: right; font-family: Consolas, monospace; color: #1d4ed8; }

/* a newer version is out (Help ▸ Check for Updates) */
#update-banner { position: fixed; right: 14px; bottom: 34px; z-index: 40; display: flex; align-items: center; gap: 8px; padding: 8px 10px 8px 12px; background: var(--panel, #fff); border: 1px solid var(--border, #c9ced6); border-left: 4px solid #2b7de9; border-radius: 6px; box-shadow: 0 6px 18px rgba(0,0,0,.18); font-size: 12.5px; }
#update-banner svg { width: 18px; height: 18px; }
#update-banner button { border: 1px solid var(--border, #c9ced6); background: #fff; border-radius: 4px; padding: 3px 10px; cursor: pointer; }
#update-banner button.primary { background: #2b7de9; border-color: #2b7de9; color: #fff; }

/* Fix References */
.fixrefs { max-width: 760px; max-height: 60vh; overflow: auto; }
.fixrefs td { vertical-align: top; }
.fixrefs td svg { width: 16px; height: 16px; vertical-align: -3px; }
.fixrefs tr.focus td { background: var(--sel-soft, rgba(33, 150, 243, 0.12)); }
.fixrefs .fix-acts { white-space: nowrap; }
.fixrefs .fix-acts button { margin: 0 4px 4px 0; }

/* Macros dialog */
.macros { display: flex; gap: 10px; width: min(1000px, 90vw); height: min(620px, 70vh); }
.macros .mc-side { width: 190px; flex: none; display: flex; flex-direction: column; gap: 6px; }
.macros .mc-list { flex: 1; overflow: auto; border: 1px solid var(--border); border-radius: 3px; background: var(--panel); }
.macros .mc-list .li { display: flex; align-items: center; gap: 6px; padding: 4px 6px; cursor: pointer; }
.macros .mc-list .li svg { width: 16px; height: 16px; flex: none; }
.macros .mc-list .li.active { background: var(--sel, #dbe8fb); }
.macros .mc-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.macros .mc-row { display: flex; align-items: center; gap: 8px; }
.macros .mc-name { flex: 1; }
.macros .mc-code { flex: 1; min-height: 200px; resize: none; font: 12.5px/1.45 Consolas, 'Cascadia Mono', monospace; tab-size: 2; padding: 6px; border: 1px solid var(--border); border-radius: 3px; background: var(--panel); color: inherit; }
.macros .mc-bar { display: flex; gap: 6px; flex-wrap: wrap; }
.macros .mc-gap { flex: 1; }
.macros .mc-out, .macros .mc-api { margin: 0; max-height: 120px; overflow: auto; font: 12px/1.4 Consolas, monospace; white-space: pre-wrap; padding: 4px 6px; background: var(--panel); border: 1px solid var(--border); border-radius: 3px; }
.macros .mc-out:empty { display: none; }
.macros .mc-out.err { color: #c62828; }
.macros .mc-api { max-height: 220px; }
#status-macro { color: #d23c3c; font-weight: 600; cursor: pointer; margin-right: 10px; }

/* Part / assembly properties and BOM table columns */
.cprops .cp-table, .bomcols .bc-table { border-collapse: collapse; width: 100%; }
.cprops th, .bomcols th { text-align: left; font-weight: 600; padding: 2px 4px; }
.cprops td, .bomcols td { padding: 2px 4px; }
.cprops input[type=text] { width: 100%; min-width: 180px; box-sizing: border-box; }
.cprops .cp-del { padding: 2px 4px; line-height: 0; }
.cprops .cp-del svg { width: 16px; height: 16px; }
.cprops .cp-add { margin-top: 6px; }
.bomcols { min-width: 520px; }
.bomcols .bc-btns button { padding: 1px 6px; margin-right: 2px; }
.bomcols .bc-grid { max-height: 260px; overflow: auto; border: 1px solid var(--border); border-radius: 3px; margin-top: 4px; }
.bomcols .bc-grid table { border-collapse: collapse; width: 100%; }
.bomcols .bc-grid td, .bomcols .bc-grid th { border-bottom: 1px solid var(--border); white-space: pre; }
.bomcols .bc-grid input { width: 100%; min-width: 90px; box-sizing: border-box; }

/* The browser version's notice */
#app.with-notice { grid-template-rows: auto 30px auto 1fr 22px; grid-template-columns: minmax(0, 1fr); }
#web-notice { display: flex; align-items: center; gap: 10px; padding: 5px 10px; background: #fff6d6; border-bottom: 1px solid #e6d28a; color: #4a3f12; font-size: 12.5px; }
#web-notice span { flex: 1; min-width: 0; }
#web-notice a { color: #1d5fb8; }
#web-notice .x { border: 0; background: none; cursor: pointer; font-size: 13px; color: inherit; }

/* ---------- Dark theme (View ▸ Theme ▸ Dark): the colours above, and the light ones written in directly ---------- */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1b1f25;
  --panel: #23282f;
  --panel2: #2a3038;
  --border: #3e4651;
  --border-soft: #343b45;
  --text: #dde3ea;
  --muted: #9ba5b3;
  --accent: #4b8fe6;
  --accent-weak: #263d5c;
  --hover: #2e3946;
  --danger: #ef5350;
  --ok: #66bb6a;
  --title: #14171c;
  --sketch: #60a5fa;
  --sel: #263d5c;
}
[data-theme="dark"] input, [data-theme="dark"] select, [data-theme="dark"] textarea { background-color: var(--panel2); color: var(--text); border-color: var(--border); }
[data-theme="dark"] .mi.disabled { color: #6c7584; }
[data-theme="dark"] .cm-btn:hover, [data-theme="dark"] #hud button:hover { border-color: #3f5f8c; }
[data-theme="dark"] .cm-btn.active, [data-theme="dark"] #hud button.on { border-color: #4b77b5; }
[data-theme="dark"] #splitter:hover { background: #33507a; }
[data-theme="dark"] .s3-tool, [data-theme="dark"] .s3-plane, [data-theme="dark"] .s3-input, [data-theme="dark"] .pm-input input, [data-theme="dark"] .pm-list,
[data-theme="dark"] .mate .slot, [data-theme="dark"] .bodyprops .bp-kv input, [data-theme="dark"] .bodyprops .bp-kv select, [data-theme="dark"] #progress .pg-bar,
[data-theme="dark"] #update-banner button, [data-theme="dark"] .nd-thumb { background: var(--panel2); }
[data-theme="dark"] .s3-tool.active, [data-theme="dark"] .s3-plane.active { background: #2b4366; border-color: #4b77b5; }
[data-theme="dark"] .s3-dim { background: #1f2a3a; border-color: #60a5fa; color: #93c5fd; }
[data-theme="dark"] .s3-rel { background: #3a3218; border-color: #8a7330; color: #f3d77a; }
[data-theme="dark"] .s3-coord span { color: #b6c0cd; }
[data-theme="dark"] .s3-axis { text-shadow: 0 0 2px #000, 0 0 3px #000; }
[data-theme="dark"] .s3-xyz input.bad, [data-theme="dark"] .s3-input input.bad, [data-theme="dark"] .pm-input input.bad { background: #3a2224; }
[data-theme="dark"] table.bom th { background: #2f3640; }
[data-theme="dark"] .tn .tvis { background: rgba(35, 40, 47, .55); }
[data-theme="dark"] .tn .tvis.on:hover, [data-theme="dark"] .tn .tvis.off:hover { background: #2b3e58; }
[data-theme="dark"] .tn.selected { border-color: #3f5f8c; }
[data-theme="dark"] .tn.editing { background: #3a3420; border-color: #7d6a2e; }
[data-theme="dark"] .tn.suppressed .tl, [data-theme="dark"] .tn.rolled .tl { color: #707a88; }
[data-theme="dark"] .tn.hidden-item .tl { color: #8b94a2; }
[data-theme="dark"] .tn.tree-same .tsub { color: #7fb0f0; }
[data-theme="dark"] .pm-msg { background: #3a3420; border-color: #6e5f2a; color: #f0e3b8; }
[data-theme="dark"] .pm-msg.err { background: #3d2224; border-color: #7a3a3a; color: #f4b4b4; }
[data-theme="dark"] .pm-msg.ok { background: #1f3322; border-color: #3f6e44; color: #b5e3b8; }
[data-theme="dark"] .pm-msg.warn { background: #3a2c1c; border-color: #8a6230; color: #f5cf9b; }
[data-theme="dark"] .pm-input .val { color: #7fd08c; }
[data-theme="dark"] .pm-rels button:hover { border-color: #3f5f8c; }
[data-theme="dark"] .pm-list .li .x:hover { background: #4a2628; }
[data-theme="dark"] #drawing { background: #15181d; }
[data-theme="dark"] .dw-sheet { background: #2b3138; }
[data-theme="dark"] .dw-sheet.active { background: var(--panel2); }
[data-theme="dark"] #viewport { background: linear-gradient(180deg, #2c3542 0%, #20262f 55%, #191d23 100%); }
[data-theme="dark"] .plabel { color: #b6c0cd; background: rgba(27, 31, 37, .6); }
[data-theme="dark"] .dim { color: #9cc2ff; background: rgba(28, 34, 44, .9); border-color: #3b4f70; }
[data-theme="dark"] .dim:hover { background: #26303c; color: #fff; }
[data-theme="dark"] .dim.selected { background: #263d5c; }
[data-theme="dark"] .dim.driven { color: #8f99a9; }
[data-theme="dark"] .dim .sig { color: #f0a050; }
[data-theme="dark"] .cursor-tip { color: #9cc2ff; background: rgba(28, 34, 44, .9); border-color: #3b4f70; }
[data-theme="dark"] #hud { background: rgba(35, 40, 47, .78); border-color: rgba(80, 92, 108, .6); }
[data-theme="dark"] #hud button.drop::after { border-top-color: #aab; }
[data-theme="dark"] #hud .hsep { background: rgba(80, 92, 108, .6); }
[data-theme="dark"] #claude-panel { background: var(--panel2); border-color: var(--border); }
[data-theme="dark"] #claude-panel .cl-h { background: var(--panel); border-color: var(--border-soft); }
[data-theme="dark"] #claude-panel .cl-h button:hover { background: var(--hover); border-color: var(--border); }
[data-theme="dark"] #claude-panel .cl-m b { color: #a5afbd; }
[data-theme="dark"] #claude-panel .cl-you > div { background: #263d5c; }
[data-theme="dark"] #claude-panel .cl-claude > div { background: #2f3640; }
[data-theme="dark"] #claude-panel .cl-note, [data-theme="dark"] #claude-panel .cl-busy { color: #a5afbd; }
[data-theme="dark"] #claude-panel .cl-in { border-color: var(--border-soft); }
[data-theme="dark"] #claude-panel textarea { border-color: var(--border); }
[data-theme="dark"] #confirm-corner button { background: rgba(42, 48, 56, .9); }
[data-theme="dark"] #confirm-corner button:hover { background: var(--panel2); }
[data-theme="dark"] .modal-back { background: rgba(0, 0, 0, .45); }
[data-theme="dark"] .start-btn:hover { border-color: #3f5f8c; }
[data-theme="dark"] .start-btn.warn, [data-theme="dark"] .start-recover { background: #3a2c1c; border-color: #8a6230; }
[data-theme="dark"] .start-recover small, [data-theme="dark"] .start-item .si-badge { color: #f5cf9b; }
[data-theme="dark"] .start-item .si-badge { background: #3a2c1c; border-color: #8a6230; }
[data-theme="dark"] .start-item .si-thumb { background: #2f3640; }
[data-theme="dark"] .start-tour { background: #1f2f45; border-color: #3f5f8c; }
[data-theme="dark"] .nd-item.active { background: #1f3550; }
[data-theme="dark"] .nd-badge { color: #8fd0f5; background: #1f3550; border-color: #2f6f95; }
[data-theme="dark"] #progress .pg-stop { background: transparent; }
[data-theme="dark"] #busy-banner { background: #3a3420; border-color: #8a7330; color: #f0e3b8; }
[data-theme="dark"] .bodyprops .bp-kv input, [data-theme="dark"] .bodyprops .bp-kv select { border-color: var(--border); }
[data-theme="dark"] .tw-ring { background: radial-gradient(circle, rgba(0,0,0,0) 0 30px, rgba(35, 40, 47, .94) 31px 127px); }
[data-theme="dark"] .rollback-bar span { box-shadow: 0 0 0 1px #000; background: #4b8fe6; }
[data-theme="dark"] .doctab.active { color: var(--text); }
[data-theme="dark"] #vp-banner button { background: var(--panel2); color: var(--text); }
[data-theme="dark"] .measure-kv b { color: #f0b46a; }
[data-theme="dark"] #cmd-search .cs-row.on { background: #263d5c; }
[data-theme="dark"] .sc-row .sc-k { color: #7fb0f0; }
[data-theme="dark"] #update-banner button.primary { background: var(--accent); border-color: var(--accent); }
[data-theme="dark"] #web-notice { background: #3a3420; border-color: #6e5f2a; color: #f0e3b8; }
[data-theme="dark"] #web-notice a { color: #8fbdf5; }
[data-theme="dark"] .macros .mc-out.err { color: #f4a3a3; }
[data-theme="dark"] .dxf-sw { border-color: #8a94a6; }
[data-theme="dark"] a { color: #8fbdf5; }

/* Translated labels: long words break at their soft hyphens (the dictionaries put them in) */
.cm-btn > span:last-child, .pm-gt, .pm-row > label, .start-btn small { hyphens: manual; }

/* Report a Problem */
.report-issue { display: flex; flex-direction: column; width: min(720px, 86vw); }
.report-issue .ri-title { width: 100%; }
.report-issue .ri-body { width: 100%; height: min(420px, 50vh); resize: vertical; font: 12px/1.4 Consolas, 'Cascadia Mono', monospace; padding: 6px; border: 1px solid var(--border); border-radius: 3px; }

/* Auto Dimension options */
.ad-kinds { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 12px; }
.dw-form .ad-kinds label, .dw-form .ad-check { display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.dw-form input[type=checkbox] { width: auto; flex: none; margin: 0; }

/* Compare With */
.compare { width: min(640px, 86vw); }
.compare .cmp-list { max-height: 46vh; overflow: auto; border: 1px solid var(--border); border-radius: 3px; margin-top: 4px; }
.compare .cmp-row { display: flex; align-items: center; gap: 6px; padding: 3px 8px; border-bottom: 1px solid var(--border-soft); }
.compare .cmp-row svg { width: 16px; height: 16px; flex: none; }
.compare .cmp-n { font-weight: 600; }
.compare .cmp-w { color: var(--muted); }
.compare .cmp-row.add .cmp-w { color: #2e7d32; }
.compare .cmp-row.rem .cmp-w { color: #c62828; }
.compare .cmp-add { color: #f5c518; }
.compare .cmp-rem { color: #e53935; }

/* Check Drawing */
.dc-wrap { max-height: 60vh; overflow: auto; min-width: 460px; }
.dc-wrap p { margin: 0 0 8px; }
.dc-group { font-weight: 600; margin: 10px 0 4px; }
.dc-item { display: flex; align-items: flex-start; gap: 8px; width: 100%; text-align: left; background: none; border: 1px solid transparent; border-radius: 4px; padding: 4px 6px; cursor: pointer; font: inherit; color: inherit; }
.dc-item:hover { background: rgba(43, 125, 233, 0.08); border-color: rgba(43, 125, 233, 0.3); }
.dc-dot { flex: none; width: 9px; height: 9px; border-radius: 50%; margin-top: 4px; }
.dc-error .dc-dot { background: #dc2626; }
.dc-warn .dc-dot { background: #f59e0b; }
.dc-info .dc-dot { background: #94a3b8; }

/* Keyboard focus (a11y.js): shown when it came from the keyboard */
button:focus-visible, [role="button"]:focus-visible, .pm-gt:focus-visible, select:focus-visible, a:focus-visible, .dc-item:focus-visible { outline: 2px solid var(--accent, #2b7de9); outline-offset: 1px; }
.pm-list .x[role="button"]:focus-visible { outline-offset: 0; border-radius: 3px; }
#c:focus-visible { outline: 2px solid var(--accent, #2b7de9); outline-offset: -2px; }