:root {
  --bg: #f3f5f4;
  --panel: #ffffff;
  --panel-2: #f7f9f8;
  --line: #dde3e0;
  --text: #17211c;
  --muted: #64716b;
  --accent: #128052;
  --accent-ink: #ffffff;
  --accent-soft: #e2f3ea;
  --warn: #b26a00;
  --err: #c62f2f;
  --ok: #128052;
  --gold: #c99a0e;
  --term-bg: #0f1512;
  --term-text: #d6e2db;
  --term-dim: #7f9288;
  --term-acc: #6ee7a8;
  --term-tool: #f2c35b;
  --b2d-bg: #e9edeb;
  --b2d-grid: rgba(0, 0, 0, .06);
  --b2d-board: #1f5d3f;
  --b2d-edge: #f4d35e;
  --b2d-fp: #9fb7a9;
  --b2d-ic: #2e3a35;
  --b2d-passive: #c7a46a;
  --b2d-connector: #8c96a8;
  --b2d-hole: #c0c0c0;
  --b2d-small: #b5c0ba;
  --b2d-fp-b: #6f8fb5;
  --b2d-fp-line: rgba(255, 255, 255, .55);
  --b2d-pad: #e3b341;
  --b2d-rats: rgba(140, 220, 255, .75);
  --b2d-sel: #ff5d5d;
  --b2d-text: #ffffff;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .05), 0 4px 16px rgba(0, 0, 0, .04);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1210; --panel: #151c19; --panel-2: #1a2320; --line: #28332e; --text: #e3ebe6; --muted: #8b9a92;
    --accent: #2fb47a; --accent-ink: #04140c; --accent-soft: #163327; --warn: #e2a33b; --err: #ef6b6b; --ok: #47c98c;
    --b2d-bg: #0b100e; --b2d-grid: rgba(255, 255, 255, .05); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1210; --panel: #151c19; --panel-2: #1a2320; --line: #28332e; --text: #e3ebe6; --muted: #8b9a92;
  --accent: #2fb47a; --accent-ink: #04140c; --accent-soft: #163327; --warn: #e2a33b; --err: #ef6b6b; --ok: #47c98c;
  --b2d-bg: #0b100e; --b2d-grid: rgba(255, 255, 255, .05); color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 14px/1.45 "Pretendard", "Segoe UI", system-ui, -apple-system, "Malgun Gothic", sans-serif;
  display: flex; flex-direction: column;
}
code, pre, .mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }
code { background: var(--panel-2); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; font-size: .92em; }
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

/* ---------- header ---------- */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 { font-size: 17px; margin: 0; letter-spacing: -.01em; }
.brand p { margin: 0; color: var(--muted); font-size: 12px; }
.logo { width: 30px; height: 30px; border-radius: 7px; background: linear-gradient(135deg, #128052, #0b5a38); position: relative; flex: none; }
.logo::before { content: ""; position: absolute; inset: 9px; background: #111; border-radius: 2px; box-shadow: -6px -4px 0 -3px #f4c430, -6px 4px 0 -3px #f4c430, 6px -4px 0 -3px #f4c430, 6px 4px 0 -3px #f4c430; }
.conn { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); min-width: 0; }
.conn span:nth-child(2) { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dot { width: 9px; height: 9px; border-radius: 50%; flex: none; background: var(--err); }
.dot.on { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent); }
.dot.wait { background: var(--warn); }

.banner { display: flex; gap: 16px; align-items: flex-start; justify-content: space-between; margin: 12px 16px 0; padding: 12px 16px; border-radius: var(--radius); background: color-mix(in srgb, var(--warn) 12%, var(--panel)); border: 1px solid color-mix(in srgb, var(--warn) 40%, var(--line)); }
.banner ol { margin: 6px 0 0; padding-left: 20px; }

/* ---------- layout ---------- */
/* panels with draggable dividers (sizes in CSS variables, set by app.js and remembered) */
.layout {
  flex: 1; min-height: 0; display: grid; gap: 0; padding: 12px 16px 16px;
  grid-template-columns: var(--w-set, 340px) 12px minmax(0, 1fr) 12px var(--w-info, 420px);
  grid-template-rows: minmax(0, 1fr) 12px var(--h-term, 34vh);
  grid-template-areas: "set gv view gi info" "set gv gt gt gt" "set gv term term term";
}
.gutter { position: relative; z-index: 3; touch-action: none; }
.gutter::after { content: ""; position: absolute; border-radius: 2px; background: transparent; transition: background .12s; }
.gutter.col { cursor: col-resize; }
.gutter.col::after { left: 4px; right: 4px; top: 30%; bottom: 30%; }
.gutter.row { cursor: row-resize; }
.gutter.row::after { top: 4px; bottom: 4px; left: 35%; right: 35%; }
.gutter:hover::after, .gutter.dragging::after { background: var(--accent); }
.gutter[data-split="set"] { grid-area: gv; }
.gutter[data-split="info"] { grid-area: gi; }
.gutter[data-split="view"] { grid-area: gh; display: none; }
.gutter[data-split="term"] { grid-area: gt; }
body.resizing, body.resizing * { user-select: none !important; }
body.resizing.col, body.resizing.col * { cursor: col-resize !important; }
body.resizing.row, body.resizing.row * { cursor: row-resize !important; }
body.resizing iframe, body.resizing canvas { pointer-events: none; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); min-height: 0; min-width: 0; }
.settings { grid-area: set; overflow: auto; padding: 4px 14px 14px; }
.viewer { grid-area: view; display: flex; flex-direction: column; overflow: hidden; }
.info-panel { grid-area: info; display: flex; flex-direction: column; overflow: hidden; }
.term { grid-area: term; display: flex; flex-direction: column; overflow: hidden; background: var(--term-bg); border-color: #1f2a25; color: var(--term-text); }

/* ---------- settings ---------- */
.step { padding: 12px 0; border-bottom: 1px solid var(--line); }
.step:last-child { border-bottom: 0; }
.step h2 { font-size: 14px; margin: 0 0 8px; display: flex; align-items: center; gap: 8px; }
.n { width: 20px; height: 20px; border-radius: 50%; display: inline-grid; place-items: center; font-size: 12px; background: var(--accent-soft); color: var(--accent); font-weight: 700; }
label { display: block; font-size: 12px; color: var(--muted); }
label > input, label > select { display: block; width: 100%; margin-top: 3px; }
input[type=text], input[type=number], input[type=search], select, textarea {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 7px; padding: 6px 9px; color: var(--text); min-width: 0;
}
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.pathrow { display: flex; gap: 6px; margin-bottom: 6px; }
.pathrow input { flex: 1; font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 8px; }
.check { display: flex; gap: 7px; align-items: center; color: var(--text); font-size: 13px; margin: 5px 0; }
.check input { margin: 0; accent-color: var(--accent); display: inline-block; width: auto; flex: none; }
.inline { display: flex; align-items: center; gap: 8px; margin-top: 8px; }
.inline select { width: auto; margin: 0; }
.hint { color: var(--muted); font-size: 12px; margin: 6px 0 10px; }
.info { font-size: 12.5px; margin-top: 6px; }
.info .kv { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; }
.info .kv b { font-weight: 500; color: var(--muted); }
.muted { color: var(--muted); }
.ok { color: var(--ok); } .warn { color: var(--warn); } .err { color: var(--err); }
.tag { display: inline-block; padding: 1px 7px; border-radius: 99px; font-size: 11.5px; background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.tag.warn { background: color-mix(in srgb, var(--warn) 15%, transparent); color: var(--warn); }
.tag.err { background: color-mix(in srgb, var(--err) 15%, transparent); color: var(--err); }

button { cursor: pointer; border: 1px solid var(--line); background: var(--panel-2); border-radius: 7px; padding: 6px 12px; }
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
button.primary:hover:not(:disabled) { filter: brightness(1.08); }
button.ghost { background: transparent; }
button.sm { padding: 4px 10px; font-size: 12.5px; }
button.big { width: 100%; padding: 10px; font-size: 15px; margin-bottom: 8px; }
.row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; margin-top: 12px; }
.spacer { flex: 1; }

.shapes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-bottom: 8px; }
.shape { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 7px 2px 5px; font-size: 11.5px; }
.shape svg { width: 26px; height: 22px; }
.shape svg * { fill: none; stroke: currentColor; stroke-width: 2; }
.shape[aria-checked="true"] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.dxf { margin-top: 4px; }
.file { display: block; }
.file input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.file span { display: block; text-align: center; padding: 8px; border: 1.5px dashed var(--line); border-radius: 8px; color: var(--text); font-size: 13px; cursor: pointer; }
.file:hover span, .file input:focus-visible + span { border-color: var(--accent); }
.layers { display: flex; flex-wrap: wrap; gap: 4px 10px; margin-top: 6px; }
.layers label { display: flex; align-items: center; gap: 4px; color: var(--text); }

/* ---------- tabs ---------- */
.tabs { display: flex; align-items: center; gap: 2px; padding: 6px 8px 0; border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: thin; flex: none; }
.tabs button { border: 0; background: none; border-radius: 7px 7px 0 0; padding: 7px 11px; color: var(--muted); white-space: nowrap; border-bottom: 2px solid transparent; }
.tabs button.on { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.busy { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--accent); padding-right: 6px; white-space: nowrap; }
.busy i { width: 13px; height: 13px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- viewer ---------- */
.stage { flex: 1; min-height: 0; position: relative; }
.view { position: absolute; inset: 0; display: grid; place-items: center; background: #1b2420; overflow: hidden; }
.view.light { background: #fff; }
.view img { max-width: 100%; max-height: 100%; object-fit: contain; }
.view img:not([src]), .view img[src=""] { display: none; }
.view img[src]:not([src=""]) + .empty { display: none; }
.empty { color: #9fb0a8; font-size: 13px; padding: 20px; text-align: center; }
#cv2d { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; cursor: crosshair; }
.tip { position: absolute; pointer-events: none; background: rgba(10, 14, 12, .92); color: #e8f1ec; padding: 6px 9px; border-radius: 7px; font-size: 12px; line-height: 1.4; max-width: 320px; z-index: 3; }
.tip span { color: #9fb0a8; }
.b2d-tools { position: absolute; left: 10px; top: 10px; display: flex; gap: 10px; align-items: center; background: rgba(10, 14, 12, .7); color: #dce7e1; padding: 4px 10px; border-radius: 8px; font-size: 12px; }
.b2d-tools label { color: inherit; display: flex; gap: 4px; align-items: center; }
.b2d-tools .muted { color: #93a59c; }

/* ---------- info ---------- */
.info-body { flex: 1; min-height: 0; overflow: auto; }
.info-body > div { min-height: 100%; }
.pad { padding: 12px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 8px; padding: 12px; }
.card { background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 8px 10px; }
.card b { display: block; font-size: 19px; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.card span { font-size: 11.5px; color: var(--muted); }
.card.warn b { color: var(--warn); } .card.err b { color: var(--err); } .card.ok b { color: var(--ok); }
.sum-sec { padding: 0 12px 12px; }
.sum-sec h4 { margin: 4px 0 6px; font-size: 12.5px; color: var(--muted); font-weight: 600; }
.bar { height: 8px; border-radius: 99px; background: var(--panel-2); border: 1px solid var(--line); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); }
.kind-row { display: flex; gap: 6px; flex-wrap: wrap; }
ul.plain { margin: 0; padding-left: 18px; font-size: 12.5px; }
.tbl-tools { display: flex; gap: 6px; padding: 8px; position: sticky; top: 0; background: var(--panel); z-index: 1; }
.tbl-tools input { flex: 1; }
.tbl-wrap { overflow: auto; }
table { border-collapse: collapse; width: 100%; font-size: 12.5px; }
th, td { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { position: sticky; top: 0; background: var(--panel-2); font-weight: 600; color: var(--muted); font-size: 11.5px; cursor: pointer; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.sel td { background: var(--accent-soft); }
tbody tr:hover td { background: var(--panel-2); cursor: pointer; }
td a { color: var(--accent); }
.log { margin: 0; padding: 10px 12px; font-size: 12px; white-space: pre-wrap; word-break: break-all; color: var(--text); }
.log .e { color: var(--err); } .log .w { color: var(--warn); } .log .d { color: var(--muted); }
.drc-g { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; margin-bottom: 8px; }
.drc-g header { display: flex; gap: 8px; align-items: center; }
.drc-g ul { margin: 6px 0 0; padding-left: 18px; font-size: 12px; color: var(--muted); }
.sheet { padding: 3px 0; font-size: 13px; }

/* ---------- terminal ---------- */
.term-head { display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-bottom: 1px solid #1f2a25; flex: none; min-width: 0; }
.term-title { font-family: ui-monospace, Consolas, monospace; color: var(--term-acc); font-weight: 600; white-space: nowrap; }
.term-title small { color: var(--term-dim); font-weight: 400; }
.term .ghost { color: var(--term-text); border-color: #2a3832; }
.chips { display: flex; gap: 5px; overflow-x: auto; scrollbar-width: none; min-width: 0; }
.chips button { background: #17211d; border: 1px solid #2a3832; color: var(--term-text); border-radius: 99px; padding: 2px 10px; font-size: 12px; white-space: nowrap; }
.term-out { flex: 1; min-height: 0; overflow: auto; padding: 8px 12px; font: 12.5px/1.5 ui-monospace, "Cascadia Code", Consolas, monospace; white-space: pre-wrap; word-break: break-word; }
.term-out > div { margin: 2px 0; }
.t-user { color: #fff; } .t-user::before { content: "❯ "; color: var(--term-acc); }
.t-text { color: var(--term-text); }
.t-tool { color: var(--term-tool); } .t-tool::before { content: "⏺ "; }
.t-res { color: var(--term-dim); border-left: 2px solid #2a3832; padding-left: 8px; max-height: 7.5em; overflow: hidden; }
.t-res.err { color: #f19999; }
.t-sys { color: var(--term-dim); font-style: italic; }
.t-err { color: #f19999; }
.t-done { color: var(--term-acc); }
.term-in { display: flex; gap: 8px; align-items: flex-end; padding: 8px 10px; border-top: 1px solid #1f2a25; flex: none; }
.term-in .prompt { color: var(--term-acc); font-family: ui-monospace, Consolas, monospace; padding-bottom: 6px; }
.term-in textarea { flex: 1; resize: none; background: #121a16; border-color: #2a3832; color: #fff; font-family: ui-monospace, Consolas, monospace; font-size: 13px; max-height: 120px; }

/* ---------- dialogs ---------- */
.dlg { border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); width: min(640px, calc(100vw - 32px)); padding: 16px; box-shadow: 0 20px 60px rgba(0, 0, 0, .3); }
.dlg::backdrop { background: rgba(0, 0, 0, .35); }
.dlg h3 { margin: 0 0 10px; }
.dlg input[type=text] { width: 100%; }
.browse { list-style: none; margin: 8px 0 0; padding: 0; height: min(52vh, 420px); overflow: auto; border: 1px solid var(--line); border-radius: 8px; }
.browse li { padding: 6px 10px; cursor: pointer; display: flex; gap: 8px; font-size: 13px; border-bottom: 1px solid var(--line); }
.browse li:hover { background: var(--panel-2); }
.browse li.file { color: var(--muted); cursor: default; }
.browse li.proj { color: var(--accent); font-weight: 600; }

/* ---------- responsive ---------- */
@media (max-width: 1280px) {
  .layout {
    grid-template-columns: var(--w-set, 320px) 12px minmax(0, 1fr);
    grid-template-rows: var(--h-view, 56vh) 12px minmax(240px, 1fr) 12px var(--h-term, 34vh);
    grid-template-areas: "set gv view" "set gv gh" "set gv info" "gt gt gt" "term term term";
  }
  .gutter[data-split="info"] { display: none; }
  .gutter[data-split="view"] { display: block; }
}
@media (max-width: 860px) {
  body { height: auto; }
  .layout { display: flex; flex-direction: column; padding: 12px 16px; gap: 12px; }
  .gutter { display: none !important; }
  .viewer { height: 62vh; } .info-panel { height: 60vh; } .term { height: 60vh; }
  .top { flex-wrap: wrap; }
  .shapes { grid-template-columns: repeat(4, 1fr); }
}

/* footprint agent tab */
.badge { display: inline-block; min-width: 18px; padding: 0 5px; border-radius: 99px; background: var(--warn); color: #fff; font-size: 11px; font-weight: 700; line-height: 17px; text-align: center; }
.fp-head { display: flex; align-items: center; gap: 8px; padding: 10px 12px 4px; }
.fp-title { display: flex; flex-direction: column; line-height: 1.25; font-size: 13px; }
.fp-title span { font-size: 11.5px; }
.sm-link { font-size: 12.5px; color: var(--accent); }
.pad-x { padding: 0 12px; font-size: 12.5px; }
.fp-tools { display: flex; align-items: center; gap: 6px 12px; margin: 6px 0; flex-wrap: wrap; }
.fp-tools button { white-space: nowrap; }
.fp-job { display: flex; gap: 10px; margin: 6px 12px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 9px; background: var(--panel-2); font-size: 12.5px; }
.fp-job img { width: 92px; height: 72px; object-fit: contain; background: #fff; border-radius: 6px; border: 1px solid var(--line); flex: none; }
.fp-job .meta { flex: 1; min-width: 0; }
.fp-job .meta .last { color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fp-job .row { margin-top: 4px; }
.st { display: inline-block; padding: 0 7px; border-radius: 99px; font-size: 11.5px; font-weight: 600; background: var(--panel); border: 1px solid var(--line); }
.st.ok, .st.saved, .st.passed, .st.agent { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.st.missing, .st.none, .st.needs_review { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, transparent); }
.st.failed { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, transparent); }
.st.running, .st.queued { color: var(--accent); }
#fpTbl td { vertical-align: top; white-space: normal; }
#fpTbl .fp-part { width: 32%; }
#fpTbl .fp-name { font-size: 11px; word-break: break-all; margin-top: 2px; }
#fpTbl .fp-form label { display: block; margin-bottom: 4px; font-size: 11px; }
#fpTbl .fp-form label > input, #fpTbl .fp-form label > select { display: block; margin-top: 1px; }
#fpTbl .fp-form input, #fpTbl .fp-form select { width: 100%; min-width: 0; padding: 3px 6px; font-size: 12px; }
#fpTbl tbody tr:hover td { background: none; cursor: default; }
#fpTbl td:last-child { width: 1%; }
#fpTbl td:last-child button { white-space: nowrap; display: block; width: 100%; margin-bottom: 4px; }
.fp-job img { width: 120px; height: 90px; }

.fp-prefs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 6px 0; }
.fp-prefs select { width: 100%; }
.fp-summary { margin: 6px 12px; padding: 8px 10px; border-radius: 8px; background: var(--accent-soft); font-size: 12.5px; }
.fp-summary ul { margin: 4px 0 0; padding-left: 18px; }
.fp-lib { display: flex; gap: 4px; margin-top: 4px; }
.fp-lib select { flex: 1; min-width: 0; font-size: 12px; padding: 3px 4px; }
.fp-note { font-size: 11px; color: var(--warn); margin-top: 2px; }

/* zoomable render images */
.view.zoomable { display: block; cursor: grab; touch-action: none; }
.view.zoomable.panning { cursor: grabbing; }
.view.zoomable img { position: absolute; left: 0; top: 0; max-width: none; max-height: none; user-select: none; }
.view.zoomable .empty { position: absolute; inset: 0; display: grid; place-items: center; }
.zoom-tools { position: absolute; right: 10px; top: 10px; display: flex; gap: 2px; align-items: center; background: rgba(10, 14, 12, .72); border-radius: 8px; padding: 3px; z-index: 2; }
.zoom-tools button, .b2d-tools button, .v3d-tools button { background: transparent; border: 1px solid transparent; color: #e3ece7; padding: 2px 8px; border-radius: 6px; font-size: 12.5px; }
.zoom-tools button:hover, .b2d-tools button:hover:not(:disabled), .v3d-tools button:hover { border-color: #6ee7a8; }
.zoom-pct { color: #b8c8bf; font-size: 11.5px; min-width: 42px; text-align: right; padding-right: 4px; }
.b2d-tools { flex-wrap: wrap; right: 10px; }
.b2d-tools .sep, .v3d-tools .sep { width: 1px; height: 16px; background: #50605a; margin: 0 2px; }
.b2d-tools select { width: auto; padding: 1px 4px; font-size: 12px; background: #1d2622; color: #e3ece7; border-color: #3a4842; display: inline-block; margin: 0; }
.b2d-tools button[aria-pressed="true"], .v3d-tools button.on { background: #128052; border-color: #128052; color: #fff; }
.b2d-tools button.go:not(:disabled) { background: #128052; color: #fff; }
.b2d-tools button:disabled { opacity: .45; }
#b2dEditTools { display: inline-flex; gap: 6px; align-items: center; }
#b2dEditTools[hidden] { display: none; }
.b2d-hint { margin-left: auto; }
.v3d { display: block; }
.v3d .v3d-canvas { position: absolute; inset: 0; display: block; }
.v3d-tools { position: absolute; left: 10px; top: 10px; display: flex; flex-wrap: wrap; gap: 2px; align-items: center; background: rgba(10, 14, 12, .72); border-radius: 8px; padding: 3px; z-index: 2; }
.v3d-help { position: absolute; left: 10px; bottom: 10px; color: #a9b9b0; font-size: 11.5px; background: rgba(10, 14, 12, .6); padding: 3px 8px; border-radius: 6px; z-index: 2; }
.v3d-status { position: absolute; inset: 0; display: grid; place-items: center; color: #b8c8bf; font-size: 13px; text-align: center; padding: 20px; pointer-events: none; }
.v3d-status:empty { display: none; }

/* metal PCB options, fabrication */
.metal-box { margin: 6px 0 8px; padding: 8px 10px; border-radius: 8px; background: color-mix(in srgb, #9aa7b0 14%, var(--panel)); border: 1px solid var(--line); }
.metal-box .hint { margin: 4px 0 0; }
.fab-card { margin-top: 8px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel-2); font-size: 12.5px; color: var(--text); }
.fab-card .row { margin-top: 6px; }
.fab-card a.btn { display: inline-block; padding: 4px 10px; border-radius: 7px; background: var(--accent); color: var(--accent-ink); text-decoration: none; font-weight: 600; }
.fab-card a.btn2 { display: inline-block; padding: 4px 10px; border-radius: 7px; border: 1px solid var(--line); color: var(--text); text-decoration: none; }
.fab-card details { margin-top: 6px; }
.fab-card ul { margin: 4px 0 0; padding-left: 18px; max-height: 160px; overflow: auto; }
.fab-side { position: absolute; left: 10px; top: 10px; display: flex; gap: 2px; background: rgba(10, 14, 12, .72); border-radius: 8px; padding: 3px; z-index: 2; }
.fab-side button { background: transparent; border: 1px solid transparent; color: #e3ece7; padding: 2px 10px; border-radius: 6px; font-size: 12.5px; }
.fab-side button.on { background: #128052; color: #fff; }
.fab-side button:disabled { opacity: .4; }
#btnFab { width: 100%; margin-top: 6px; }

/* existing PCB: modify / new */
.mode-banner { margin: 10px 0 2px; padding: 8px 10px; border-radius: 8px; font-size: 12.5px; background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.mode-banner b { color: var(--accent); }
.mode-banner button { margin-top: 6px; }
.exist-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.exist-choices button { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; padding: 12px; text-align: left; font-size: 14px; }
.exist-choices button small { font-weight: 400; font-size: 12px; opacity: .85; line-height: 1.4; }
@media (max-width: 600px) { .exist-choices { grid-template-columns: 1fr; } }

/* inline checkboxes inside label rows */
.b2d-tools input, .layers input { display: inline-block; width: auto; margin: 0; }
.term-head button { white-space: nowrap; flex: none; }

/* header menu */
.menu { display: flex; gap: 4px; margin-right: auto; margin-left: 24px; }
.menu a { text-decoration: none; color: var(--muted); padding: 6px 12px; border-radius: 8px; font-size: 13.5px; font-weight: 500; white-space: nowrap; }
.menu a:hover { background: var(--panel-2); color: var(--text); }
.menu a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.ghost-link { color: var(--accent); font-size: 13px; margin-right: 8px; }
@media (max-width: 860px) { .menu { order: 3; width: 100%; margin: 4px 0 0; } }

/* segmented control (hole mode) */
.seg { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; margin-bottom: 8px; }
.seg button { border: 0; border-radius: 0; background: var(--panel-2); padding: 6px 4px; font-size: 12.5px; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-checked="true"] { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.settings textarea { width: 100%; margin-top: 3px; resize: vertical; font-size: 12.5px; display: block; }