:root{
  --bg:#f6f6f3;
  --panel:#ffffff;
  --ink:#191b1c;
  --muted:#5b6166;
  --faint:#686e74;
  --line:#d9dad4;
  --line-strong:#c3c5be;
  --accent:#1f3a5f;
  --accent-soft:#eef1f6;
  --high:#9b2c2c;
  --med:#8a5a00;
  --low:#4a5568;
  --ok:#2f6f4f;
  --radius:6px;
}

*{box-sizing:border-box}
html,body{margin:0}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans","Noto Sans Devanagari",sans-serif;
  font-size:15px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:880px;margin:0 auto;padding:0 22px}

/* ---- top bar ---- */
.topbar{background:var(--panel);border-bottom:1px solid var(--line-strong)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.brand h1{font-size:16px;margin:0;font-weight:650;letter-spacing:-.1px}
.sub{margin:0;font-size:12.5px;color:var(--faint)}
.tracks{display:flex;gap:4px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:3px}
.tab{
  appearance:none;border:0;background:transparent;color:var(--muted);
  padding:7px 14px;font:inherit;font-size:13.5px;border-radius:4px;cursor:pointer
}
.tab:hover{color:var(--ink)}
.tab.is-on{background:var(--panel);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.07);font-weight:550}

/* ---- layout ---- */
main.wrap{padding-top:28px;padding-bottom:80px}
.view[hidden]{display:none}
.lede{color:var(--muted);font-size:14px;margin:0 0 16px;max-width:70ch}
::selection{background:#cfdaea;color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---- ask bar ---- */
.askbar{display:flex;gap:10px;align-items:stretch;flex-wrap:wrap}
.ask-field{position:relative;flex:1 1 auto;min-width:260px;display:flex}
#q{
  flex:1;min-width:0;padding:12px 14px;font:inherit;color:var(--ink);
  background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--radius)
}
#q:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.askbar-side{display:flex;gap:10px;align-items:center}

/* ---- voice input ---- */
.ask-field:has(.mic:not([hidden])) #q{padding-right:48px}
.mic{
  position:absolute;top:50%;right:6px;transform:translateY(-50%);width:36px;height:36px;
  display:grid;place-items:center;appearance:none;border:0;border-radius:50%;background:transparent;
  color:var(--muted);cursor:pointer;transition:background-color .15s,color .15s
}
.mic[hidden]{display:none}
.mic:hover{background:var(--accent-soft);color:var(--accent)}
.mic-stop{display:none;width:12px;height:12px;border-radius:2px;background:currentColor}
.mic.is-recording{background:#fbeaea;color:var(--high)}
.mic.is-recording svg{display:none}
.mic.is-recording .mic-stop{display:block}
.mic.is-recording::after{content:"";position:absolute;inset:0;border-radius:50%;box-shadow:0 0 0 0 rgba(155,44,44,.35);animation:mic-pulse 1.6s cubic-bezier(.16,1,.3,1) infinite}
.mic.is-busy{cursor:progress;color:var(--accent)}
.mic.is-busy svg{animation:mic-breathe 1s ease-in-out infinite alternate}
@keyframes mic-pulse{to{box-shadow:0 0 0 10px rgba(155,44,44,0)}}
@keyframes mic-breathe{from{opacity:1}to{opacity:.35}}
@media (prefers-reduced-motion:reduce){.mic.is-recording::after,.mic.is-busy svg{animation:none}}
.voice-clip{display:flex;align-items:center;gap:6px 14px;flex-wrap:wrap;margin-top:10px;padding:6px 6px 6px 8px;background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--radius)}
.voice-clip[hidden]{display:none}
.clip-play{width:32px;height:32px;display:grid;place-items:center;appearance:none;border:1px solid var(--line-strong);border-radius:50%;background:var(--panel);color:var(--accent);cursor:pointer}
.clip-play:hover{border-color:var(--accent);background:var(--accent-soft)}
.clip-play .i-stop,.clip-play.is-playing .i-play{display:none}
.clip-play.is-playing .i-stop{display:block}
.clip-label{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.clip-label span{color:var(--ink);font-weight:550}
.clip-link{appearance:none;border:0;background:none;padding:4px 0;font:inherit;font-size:13px;color:var(--muted);cursor:pointer}
.clip-link:hover{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.voice-clip .clip-send{margin-left:auto;padding:7px 14px;font-size:13px}
.voice-clip[data-state="recording"] .saved-only,.voice-clip[data-state="saved"] .rec-only{display:none}
.clip-meter{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:#fbeaea}
.clip-meter i{display:block;width:10px;height:10px;border-radius:50%;background:var(--high);transform:scale(calc(.6 + var(--lv, 0) * 1.6));transition:transform 80ms linear}
.clip-device{max-width:220px;font:inherit;font-size:12.5px;color:var(--muted);padding:5px 8px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);text-overflow:ellipsis}
.clip-device[hidden]{display:none}
.clip-device:hover{border-color:var(--line-strong);color:var(--ink)}
@media (max-width:520px){.voice-clip .clip-send{flex-basis:100%;margin-left:0;order:2}.voice-clip .clip-device{flex-basis:100%;max-width:none;order:1}}
.voice-status{margin:8px 0 0;font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.voice-status.is-error{color:var(--high)}
.primary{
  appearance:none;border:0;background:var(--accent);color:#fff;font:inherit;font-weight:550;
  padding:12px 22px;border-radius:var(--radius);cursor:pointer
}
.primary:hover{background:#182f4e}
.primary:disabled{opacity:.55;cursor:default}

/* ---- answer card ---- */
.answer-wrap{margin-top:26px}
.card{background:var(--panel);border:1px solid var(--line-strong);border-radius:8px;overflow:hidden}
.card-head{padding:20px 22px 18px}
.card.abstained{background:#fbfbf9}
.verdict{font-size:19px;font-weight:600;margin:0 0 8px;letter-spacing:-.2px}
.card.abstained .verdict{color:var(--muted)}
.detail{margin:0;color:var(--muted);font-size:14.5px}
.note{margin:0;padding:12px 22px 14px;border-top:1px solid var(--line);color:var(--faint);font-size:12px;line-height:1.5}
.tag{display:inline-block;font-size:12.5px;font-weight:600;color:var(--muted);margin-bottom:6px}

/* ---- plot details, asked step by step ---- */
.details .card-head{padding-bottom:14px}
.details-top{display:flex;justify-content:space-between;gap:12px;margin:0 0 8px;font-size:12.5px;color:var(--muted)}
.details-top span:last-child{font-variant-numeric:tabular-nums}
.details-bar{height:3px;background:var(--line);border-radius:2px;overflow:hidden;margin-bottom:16px}
.details-bar i{display:block;height:100%;background:var(--accent);transform-origin:left;transform:scaleX(var(--p,0));transition:transform .3s cubic-bezier(.16,1,.3,1)}
.details-q{font-size:19px;font-weight:600;letter-spacing:-.2px;margin:0 0 4px;text-wrap:balance}
.details-options{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px;padding:0 22px}
.details-opt{appearance:none;text-align:left;display:flex;flex-direction:column;gap:2px;padding:11px 13px;font:inherit;background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--radius);cursor:pointer;transition:border-color .12s,background-color .12s}
.details-opt b{font-size:14px;font-weight:600;color:var(--ink)}
.details-opt span{font-size:12.5px;color:var(--muted)}
.details-opt:hover{border-color:var(--accent);background:var(--accent-soft)}
.details-opt.is-on{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);background:var(--accent-soft)}
.details-other{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:14px 22px 0;padding-top:14px;border-top:1px solid var(--line)}
.details-other label{font-size:13px;color:var(--muted);margin-right:2px}
.details-other input{flex:1 1 110px;min-width:0;max-width:180px;padding:8px 10px;font:inherit;font-size:14px;border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--panel)}
.details-other select{padding:8px 8px;font:inherit;font-size:13px;border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--panel);color:var(--ink)}
.details-other input:focus,.details-other select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.details-other .primary{padding:8px 16px;font-size:13.5px}
.details-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 22px 16px;margin-top:14px;border-top:1px solid var(--line)}
.details-summary{margin:10px 0 0;font-size:13px;color:var(--muted)}
.details-summary .clip-link{margin-left:6px;color:var(--accent)}
@media (max-width:520px){.details-options{grid-template-columns:1fr 1fr;padding:0 16px}.details-other{margin:14px 16px 0}.details-foot{padding:12px 16px 16px}}

/* ---- answer sections: rules applied, then the plot ---- */
.rules{border-top:1px solid var(--line)}
.rules > .s3-title{margin:0;padding:16px 22px 0}
.rules > .s3-title + .cite{border-top:0;padding-top:10px}
.s3-apply{display:flex;align-items:center;justify-content:space-between;gap:10px 16px;flex-wrap:wrap;margin-top:16px;padding-top:14px;border-top:1px solid var(--line)}
.s3-apply-note{font-size:12.5px;color:var(--muted)}
.s3-apply-note.is-dirty{color:var(--med);font-weight:550}
.s3-apply .primary{padding:9px 18px;font-size:13.5px}
@media (max-width:520px){.s3-apply .primary{flex-basis:100%}}

/* ---- citations ---- */
.cite{border-top:1px solid var(--line);padding:16px 22px}
.cite + .cite{border-top:1px solid var(--line)}
.cite-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.rule{font-weight:650;color:var(--accent);font-size:14px}
.page{font-size:12.5px;color:var(--faint)}
.quote{
  margin:0;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px;
  line-height:1.55;color:#333;white-space:pre-wrap;word-break:break-word;
  background:#fafaf8;border:1px solid var(--line);border-radius:6px;padding:12px 14px;max-height:230px;overflow:auto
}

.spinner{color:var(--faint);font-size:13px;padding:18px 0}

@media print{
  .topbar,.askbar,.examples,.tracks{display:none}
  body{background:#fff}
  .card{break-inside:avoid}
}

/* ---- setback schematic (track 1) ---- */
.diagram{padding:6px 22px 4px}
.diagram svg{width:100%;max-width:540px;height:auto;display:block;margin:0 auto}
.d-plot{fill:#fbfbf8;stroke:#c3c5be;stroke-width:1.5}
.d-bldg{fill:#e7ecf3;stroke:#9fb1c9;stroke-width:1}
.d-gap{fill:#e9f2ea;stroke:#9dc3a8;stroke-width:1;stroke-dasharray:3 3}
.d-street{fill:#e4e4de;stroke:#c3c5be;stroke-width:1}
.d-label-c{fill:#5b6166;font-size:11px;text-anchor:middle;font-family:inherit}
.d-gap-t{fill:#2f6f4f;font-weight:600}
.d-note{fill:#8a9095;font-size:11px}
.d-dim{stroke:#8a9095;stroke-width:1}
.d-dim-t{fill:#5b6166;font-size:11px;text-anchor:end}

/* ---- 3D plot (track 1) ---- */
.scene3d{position:relative;border-top:1px solid var(--line);padding:16px 22px 18px}
.s3-title{margin:0 0 10px;font-size:14px;font-weight:600}
.s3-edit{position:absolute;top:12px;right:22px;appearance:none;border:0;background:none;color:var(--accent);font:inherit;font-size:13px;font-weight:550;padding:4px 0;cursor:pointer}
.s3-edit:hover{text-decoration:underline;text-underline-offset:3px}
.s3-head{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.s3-head .tag{margin:0}
.s3-sub{font-size:12px;color:var(--faint)}
.s3-stage{position:relative;height:430px;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#f6f6f3}
.s3-canvas{position:absolute;inset:0}
.s3-canvas canvas{display:block;touch-action:none}
.s3-nogl{padding:20px;color:var(--muted);font-size:13px}
.s3-tip{position:absolute;pointer-events:none;background:rgba(25,27,28,.88);color:#fff;font-size:12px;padding:5px 8px;border-radius:4px;white-space:nowrap}
.s3-views{position:absolute;top:10px;right:10px;display:flex;background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--radius);overflow:hidden}
.s3-views button{appearance:none;border:0;background:transparent;color:var(--muted);font:inherit;font-size:12px;padding:6px 11px;cursor:pointer}
.s3-views button.is-on{background:var(--accent);color:#fff}
.s3-hint{position:absolute;left:10px;bottom:8px;margin:0;font-size:11px;color:var(--faint);background:rgba(246,246,243,.85);padding:2px 6px;border-radius:3px}
.s3-side{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:14px}
@media (max-width:700px){.s3-side{grid-template-columns:1fr}.s3-stage{height:340px}}
.s3-readout{grid-column:1}
.s3-info{grid-column:1}
.s3-info:empty{display:none}
.s3-controls{grid-column:2;grid-row:1 / span 2;display:flex;flex-direction:column;gap:10px}
@media (max-width:700px){.s3-readout,.s3-info,.s3-controls{grid-column:1;grid-row:auto}}
.s3-big{font-size:26px;font-weight:650;letter-spacing:-.4px;font-variant-numeric:tabular-nums}
.s3-big span{font-size:13px;font-weight:450;color:var(--muted);letter-spacing:0}
.s3-big-warn{color:var(--high)}
.s3-small{font-size:12.5px;color:var(--muted);margin-bottom:10px}
.s3-legend{list-style:none;margin:0 0 10px;padding:0;display:flex;flex-direction:column;gap:4px}
.s3-legend li{display:flex;align-items:center;gap:8px;font-size:13px;padding:4px 6px;border-radius:4px;cursor:pointer}
.s3-legend li:hover{background:var(--accent-soft)}
.s3-legend li.s3-off{cursor:default;color:var(--faint)}
.s3-legend li.s3-off:hover{background:none}
.s3-src{margin-left:auto;font-size:11.5px;color:var(--accent)}
.sw{display:inline-block;width:12px;height:12px;border-radius:2px;flex:0 0 12px}
.sw-front{background:#4c9a6d}.sw-rear{background:#c58a1e}.sw-side{background:#3d6fa8}
.s3-assumed{font-size:12.5px;color:var(--muted);margin:0 0 8px}
.s3-assumed b{color:var(--med);font-weight:600}
.s3-warn{font-size:12.5px;color:var(--high);margin:0 0 8px}
.s3-info .cite-head{margin-bottom:6px}
.s3-info .quote{max-height:150px}
.s3-row{display:grid;grid-template-columns:92px 1fr 70px;align-items:center;gap:10px;font-size:13px}
.s3-lbl{color:var(--muted)}
.s3-row input[type=range]{width:100%;accent-color:var(--accent)}
.s3-row output{font-variant-numeric:tabular-nums;text-align:right;font-size:12.5px}
.s3-seg{grid-column:2 / span 2;display:flex;border:1px solid var(--line-strong);border-radius:var(--radius);overflow:hidden}
.s3-seg button{flex:1;appearance:none;border:0;background:var(--panel);color:var(--muted);font:inherit;font-size:12px;padding:6px 4px;cursor:pointer}
.s3-seg button + button{border-left:1px solid var(--line)}
.s3-seg button.is-on{background:var(--accent);color:#fff}

/* ---- 3D: status, FAR, components ---- */
.s3-status{position:absolute;top:10px;left:10px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;max-width:calc(100% - 280px)}
.s3-env{font-size:11.5px;color:var(--muted);background:rgba(255,255,255,.88);padding:3px 8px;border-radius:4px}
.s3-badge{font-size:11px;font-weight:650;padding:3px 9px;border-radius:20px;border:1px solid;white-space:nowrap}
.s3-badge.ok{color:var(--ok);border-color:#c3ddcf;background:#f2f8f4}
.s3-badge.no{color:var(--high);border-color:#e0bcbc;background:#fbf2f2}
.s3-no{color:#ffb4b4}
.s3-far{margin:4px 0 10px;cursor:pointer;padding:6px;border-radius:4px}
.s3-far:hover{background:var(--accent-soft)}
.s3-far-head{display:flex;justify-content:space-between;font-size:12.5px;color:var(--muted);margin-bottom:4px}
.s3-far-head b{color:var(--ink);font-variant-numeric:tabular-nums}
.s3-far-bar{display:block;height:8px;background:#eef0ec;border-radius:4px;overflow:hidden}
.s3-far-bar span{display:block;height:100%;background:#4c9a6d}
.s3-far.over .s3-far-bar span{background:#b23b3b}
.s3-far.over .s3-far-head b{color:var(--high)}
.s3-row select{grid-column:2 / span 2;font:inherit;font-size:13px;padding:5px 8px;border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--panel);color:var(--ink)}
.s3-row[hidden]{display:none}
.s3-comp-head{display:flex;align-items:center;gap:8px;margin-bottom:6px;font-size:14px}
.s3-cnote{margin:0 0 6px;font-size:13px}
.s3-illus{margin:0 0 10px;font-size:12px;color:var(--muted)}
.s3-info .cite-head{margin-top:8px}
.s3-palette{margin-top:16px;padding-top:12px;border-top:1px solid var(--line)}
.s3-pal summary{cursor:pointer;font-size:14px;font-weight:600;padding:2px 0;list-style-position:inside}
.s3-pal summary .s3-sub{font-weight:400;margin-left:6px}
.s3-pal[open] summary{margin-bottom:10px}
.s3-pal-row{display:grid;grid-template-columns:92px 1fr;gap:10px;align-items:start;margin-bottom:6px}
.s3-pal-row .s3-lbl{font-size:12.5px;padding-top:5px}
.s3-chips{display:flex;flex-wrap:wrap;gap:6px}
.s3-chip{appearance:none;border:1px solid var(--line-strong);background:var(--panel);color:var(--muted);font:inherit;font-size:12.5px;padding:5px 10px;border-radius:20px;cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.s3-chip:hover{color:var(--ink);border-color:var(--accent)}
.s3-chip.is-on{background:var(--accent);border-color:var(--accent);color:#fff}
.s3-chip.is-on.is-bad{background:#9b2c2c;border-color:#9b2c2c}
.s3-req{font-style:normal;font-size:10px;text-transform:uppercase;letter-spacing:.3px;background:#fbf7ee;color:#8a5a00;border:1px solid #e6d2ac;border-radius:10px;padding:0 5px}
.s3-chip.is-on .s3-req{background:rgba(255,255,255,.2);color:#fff;border-color:transparent}
.s3-nd{margin-top:12px;font-size:12.5px}
.s3-nd .rule{font-size:12.5px}
.s3-nd p{margin:4px 0 0;color:var(--muted)}

/* ---- example gallery (track 1) ---- */
.examples{margin:12px 0 0}
.ex-bar{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.ex-try{font-size:12.5px;color:var(--faint);margin-right:2px}
.ex-chip{appearance:none;border:1px solid var(--line);background:var(--panel);color:var(--muted);font:inherit;font-size:12.5px;padding:4px 10px;border-radius:20px;cursor:pointer}
.ex-chip:hover{color:var(--ink);border-color:var(--line-strong)}
.ex-toggle{appearance:none;border:0;background:none;color:var(--accent);font:inherit;font-size:12.5px;cursor:pointer;padding:4px 6px}
.ex-toggle:hover{text-decoration:underline;text-underline-offset:3px}
.ex-gallery{display:none;margin-top:14px}
.examples.is-open .ex-gallery{display:block}
.examples.is-collapsed .ex-try,.examples.is-collapsed .ex-chip{display:none}
.examples.is-collapsed .ex-toggle{padding-left:0}
.ex-tabs{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;border-bottom:1px solid var(--line)}
.ex-tab{flex:0 0 auto;white-space:nowrap;appearance:none;border:0;border-bottom:2px solid transparent;background:none;color:var(--muted);font:inherit;font-size:13px;padding:6px 10px;margin-bottom:-1px;cursor:pointer}
.ex-tab:hover{color:var(--ink)}
.ex-tab.is-on{color:var(--ink);border-bottom-color:var(--accent);font-weight:550}
.ex-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:2px 16px;margin-top:8px}
.ex-card{appearance:none;text-align:left;background:none;border:0;border-radius:6px;padding:9px 10px;cursor:pointer;font:inherit;display:flex;flex-direction:column;gap:2px}
.ex-card:hover{background:var(--panel)}
.ex-title{font-size:13px;font-weight:600;color:var(--ink)}
.ex-q{font-size:12px;color:var(--muted);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.s3-infonote{font-size:12.5px;color:var(--muted);margin:0 0 8px}

/* ---- Draw plot ---- */
/* Draw plot is wide; the header widens with it so logo and tabs line up with the page. */
body.is-wide .wrap{max-width:1320px}
.dp-tools{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:12px}
.dp-actions{margin-left:auto}
.dp-add{order:3;flex-basis:100%;align-items:center}
.dp-add-l{font-size:12.5px;color:var(--faint);padding:0 4px 0 8px}
.dp-menu{position:relative}
.dp-menu summary{list-style:none;color:var(--muted);font-size:12.5px;padding:6px 9px;border-radius:4px;cursor:pointer;user-select:none}
.dp-menu summary::-webkit-details-marker{display:none}
.dp-menu summary::after{content:"";display:inline-block;width:5px;height:5px;margin:0 0 2px 6px;border:solid currentColor;border-width:0 1.5px 1.5px 0;transform:rotate(45deg)}
.dp-menu summary:hover,.dp-menu[open] summary{color:var(--ink);background:var(--accent-soft)}
.dp-menu summary.is-on{background:var(--accent);color:#fff}
.dp-pop{position:absolute;top:calc(100% + 6px);left:0;z-index:20;min-width:170px;display:flex;flex-direction:column;padding:4px;background:var(--panel);border:1px solid var(--line-strong);border-radius:var(--radius);box-shadow:0 6px 18px rgba(25,27,28,.12)}
.dp-menu-r .dp-pop{left:auto;right:0}
.dp-pop button,.dp-pop .dp-import{text-align:left}
.dp-group{display:flex;flex-wrap:wrap;gap:4px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:3px}
.dp-group button,.dp-import{appearance:none;border:0;background:transparent;color:var(--muted);font:inherit;font-size:12.5px;padding:6px 9px;border-radius:4px;cursor:pointer}
.dp-group button:hover,.dp-import:hover{color:var(--ink);background:var(--accent-soft)}
.dp-group button.is-on{background:var(--accent);color:#fff}
.dp-main{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:14px;align-items:start}
@media (max-width:980px){.dp-main{grid-template-columns:1fr}}
.dp-canvas{position:relative;background:#fbfbf8;border:1px solid var(--line-strong);border-radius:8px;overflow:hidden;height:620px}
.dp-svg{width:100%;height:100%;display:block;touch-action:none;user-select:none;cursor:default}
.dp-svg[data-tool="select"]{cursor:grab}
.dp-svg:not([data-tool="select"]){cursor:crosshair}
.dp-hint{position:absolute;left:10px;bottom:8px;max-width:calc(100% - 20px);font-size:11.5px;color:var(--muted);background:rgba(251,251,248,.92);padding:4px 8px;border-radius:4px;pointer-events:none}
.dp-grid line{vector-effect:non-scaling-stroke;stroke:#ecede8;stroke-width:1}
.dp-grid line.g2{stroke:#dcded7}
.dp-road{fill:#4a4f55}
.dp-road-t{fill:#fff;text-anchor:middle;dominant-baseline:middle;font-weight:600;pointer-events:none}
.dp-plot{fill:#fff;stroke:#191b1c;stroke-width:2;vector-effect:non-scaling-stroke}
.dp-plot.is-sel{stroke:var(--accent)}
.dp-buildable{fill:#4c9a6d;fill-opacity:.1;stroke:#4c9a6d;stroke-opacity:.5;stroke-width:1;vector-effect:non-scaling-stroke;pointer-events:none}
.dp-setback{stroke-width:1.6;stroke-dasharray:6 4;vector-effect:non-scaling-stroke;pointer-events:none}
.dp-edge{stroke:transparent;stroke-width:14;vector-effect:non-scaling-stroke;cursor:pointer}
.dp-edge.is-road{stroke:rgba(31,58,95,.12)}
.dp-svg[data-tool="road"] .dp-edge:hover{stroke:rgba(31,58,95,.35)}
.dp-edge-t{text-anchor:middle;font-weight:600;pointer-events:none;paint-order:stroke;stroke:#fff;stroke-linejoin:round}
.dp-item{stroke-width:1.4;vector-effect:non-scaling-stroke;cursor:move}
.dp-item.is-sel{stroke:var(--accent);stroke-width:2.4}
.dp-item.is-bad{fill:#f6d5d5 !important;stroke:#b23b3b !important;stroke-width:2.2}
.dp-k-parking_bay{stroke-dasharray:4 3}
.dp-k-courtyard,.dp-k-shaft{fill-opacity:.9}
.dp-item-t,.dp-dim-t{text-anchor:middle;fill:#191b1c;pointer-events:none;paint-order:stroke;stroke:rgba(255,255,255,.85)}
.dp-dim-t{fill:var(--accent);font-weight:600}
.dp-line{stroke:#b23b3b;stroke-width:2.5;stroke-dasharray:10 5;vector-effect:non-scaling-stroke;fill:none}
.dp-line.is-sel{stroke-width:3.5}
.dp-line-hit{stroke:transparent;stroke-width:14;vector-effect:non-scaling-stroke;cursor:move}
.dp-handle{fill:#fff;stroke:var(--accent);stroke-width:1.5;vector-effect:non-scaling-stroke;cursor:nwse-resize}
.dp-vertex{fill:#fff;stroke:#191b1c;stroke-width:1.5;vector-effect:non-scaling-stroke;cursor:move}
.dp-vertex.is-sel{fill:var(--accent)}
.dp-draft{fill:none;stroke:var(--accent);stroke-width:2;stroke-dasharray:6 4;vector-effect:non-scaling-stroke}
.dp-draft-pt{fill:var(--accent)}
.dp-side{display:flex;flex-direction:column;gap:12px;max-height:620px;overflow:auto}
.dp-side > div{background:var(--panel);border:1px solid var(--line-strong);border-radius:8px;padding:12px 14px}
.dp-side h4{margin:0 0 8px;font-size:13px;color:var(--ink);font-weight:600}
.dp-check{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px;padding-top:10px;border-top:1px solid var(--line)}
.dp-check .primary[hidden]{display:none}
.dp-live{color:var(--muted)}
.dp-check .primary{padding:8px 14px;font-size:13px}
.dp-live{font-size:13px;display:flex;align-items:center;gap:6px;cursor:pointer}
.dp-badge{display:inline-block;font-size:12.5px;font-weight:650;padding:4px 11px;border-radius:20px;border:1px solid;margin-bottom:8px}
.dp-badge.ok{color:var(--ok);border-color:#c3ddcf;background:#f2f8f4}
.dp-badge.no{color:var(--high);border-color:#e0bcbc;background:#fbf2f2}
.dp-props .s3-row{grid-template-columns:96px 1fr;margin-bottom:6px}
.dp-props input[type=number],.dp-props input[type=text],.dp-props select{grid-column:2;font:inherit;font-size:13px;padding:5px 8px;border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--panel);width:100%}
.dp-props input[type=checkbox]{justify-self:start}
.dp-small{font-size:12px;color:var(--faint);margin:2px 0 6px}
.dp-del{appearance:none;border:1px solid #e0bcbc;background:#fbf2f2;color:var(--high);font:inherit;font-size:12.5px;padding:6px 10px;border-radius:var(--radius);cursor:pointer;margin-top:4px}
.dp-issues ul{list-style:none;margin:0 0 10px;padding:0;display:flex;flex-direction:column;gap:6px}
.dp-issue{display:grid;grid-template-columns:18px 1fr;gap:6px;font-size:12.5px;line-height:1.45}
.dp-issue[data-goto]{cursor:pointer}
.dp-issue[data-goto]:hover p{text-decoration:underline}
.dp-issue p{margin:0}
.dp-ico{font-weight:700;text-align:center}
.dp-issue.error .dp-ico{color:var(--high)}
.dp-issue.info .dp-ico{color:var(--accent);font-style:italic}
.dp-issue details,.dp-req{margin-top:3px}
.dp-issue summary,.dp-req summary{font-size:11.5px;color:var(--accent);cursor:pointer}
.dp-issue .quote,.dp-req .quote{font-size:11.5px;max-height:140px;margin-top:4px}
.dp-req summary{display:flex;align-items:center;gap:6px;font-size:12.5px}
.dp-req i{width:10px;height:10px;border-radius:2px;display:inline-block}
.dp-allgood{margin:0 0 10px;color:var(--ok);font-size:13px;font-weight:600}
.dp-views{margin-top:14px;border:1px solid var(--line-strong);border-radius:8px;overflow:hidden;background:#f6f6f3}
.dp-views-bar{display:flex;align-items:center;gap:2px;padding:4px 6px;background:var(--panel);border-bottom:1px solid var(--line)}
.dp-views-bar button{appearance:none;border:0;background:none;color:var(--muted);font:inherit;font-size:13px;padding:6px 12px;border-radius:4px;cursor:pointer}
.dp-views-bar button:hover{color:var(--ink)}
.dp-views-bar button.is-on{background:var(--accent-soft);color:var(--ink);font-weight:550}
.dp-views-bar .dp-sub{margin-left:auto;padding-right:6px}
[data-pane-body][hidden]{display:none}
.dp-sub{font-size:12px;color:var(--faint)}
.dp-3d{height:440px}
.dp-3d canvas{display:block}
.dp-level-t{fill:#6b5a3a;font-weight:600;pointer-events:none;paint-order:stroke;stroke:#fff}
.dp-contours line{stroke:#b9a27f;stroke-width:1;stroke-dasharray:2 3;vector-effect:non-scaling-stroke}
.dp-contour-t{fill:#8a7350;text-anchor:middle;pointer-events:none;paint-order:stroke;stroke:#fff}
.dp-section{background:#fcfcfa;min-height:440px}
.ds-svg{width:100%;height:auto;display:block}
.ds-earth{fill:#e9dfcc;stroke:#b9a27f;stroke-width:1.5}
.ds-road{stroke:#4a4f55;stroke-width:5}
.ds-plinth{fill:#bfb6a6}
.ds-stilt{fill:#f4f4ef;stroke:#9aa3ad;stroke-dasharray:4 3}
.ds-floor{fill:#e7ecf3;stroke:#1f3a5f;stroke-width:1}
.ds-floor.bad{fill:#f6d5d5;stroke:#b23b3b}
.ds-basement{fill:#9aa3ad;fill-opacity:.35;stroke:#6b7280;stroke-dasharray:4 3;transform:translateY(0)}
.ds-ref{stroke:#9b2c2c;stroke-width:1.2;stroke-dasharray:7 4}
.ds-ref-t{fill:#9b2c2c}
.ds-dim{stroke:#1f3a5f;stroke-width:1.2}
.ds-t{font-size:12px;fill:#5b6166;font-family:inherit}
.ds-h{fill:#1f3a5f;font-weight:650;font-size:13px}
.dp-road{cursor:pointer}
.dp-road.is-sel{stroke:var(--accent);stroke-width:3;vector-effect:non-scaling-stroke;fill:#3d4a5c}
.dp-step{grid-column:2;display:flex;align-items:center;gap:4px}
.dp-step input{flex:1;min-width:0}
.dp-step button{appearance:none;border:1px solid var(--line-strong);background:var(--panel);color:var(--ink);font:inherit;font-size:15px;line-height:1;width:28px;height:28px;border-radius:5px;cursor:pointer}
.dp-step button:hover{border-color:var(--accent);color:var(--accent)}
.dp-unit{font-size:12px;color:var(--faint);min-width:12px}
.dp-ack{font-size:12.5px;margin:4px 0 8px;padding:7px 9px;border-radius:5px;background:#f4f6f8;border:1px solid #d3d7de;color:var(--muted)}
.dp-ack.on{background:#f3eefa;border-color:#d9cdea;color:#4b2f6b}
.dp-ack.none{background:#fbfaf6;border-color:var(--line);color:var(--muted)}
.ds-roof{fill:#c9a08a;stroke:#9b5b3c}
.ds-parapet{fill:#c9ccc4;stroke:#8a9095}

/* ---- Building rules: reset, customize ---- */
.ghost{appearance:none;border:1px solid var(--line-strong);background:var(--panel);color:var(--muted);font:inherit;font-size:13.5px;padding:11px 16px;border-radius:var(--radius);cursor:pointer}
.ghost:hover{color:var(--ink);border-color:var(--accent)}

/* ---- Document viewer ---- */
.open-doc{appearance:none;border:0;background:none;color:var(--accent);font:inherit;font-size:12.5px;font-weight:550;padding:2px 0;cursor:pointer;margin-left:auto;white-space:nowrap}
.open-doc:hover{text-decoration:underline;text-underline-offset:3px}
.cite-head .open-doc{margin-left:auto}
.dp-issue .open-doc,.dp-req .open-doc{margin:5px 0 2px}
.dv{display:grid;grid-template-columns:280px minmax(0,1fr);gap:14px;align-items:start}
@media (max-width:900px){.dv{grid-template-columns:1fr}.dv-side{display:none}}
.dv-side{background:var(--panel);border:1px solid var(--line-strong);border-radius:8px;overflow:hidden;display:flex;flex-direction:column;height:calc(100vh - 210px);min-height:420px}
.dv-side-head{padding:10px 12px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.dv-side-head b{font-size:13px;font-weight:600;color:var(--ink)}
.dv-filter,.dv-q,.dv-pnum{font:inherit;font-size:13px;padding:6px 9px;border:1px solid var(--line-strong);border-radius:var(--radius);background:var(--panel)}
.dv-rules{list-style:none;margin:0;padding:4px 0;overflow:auto;flex:1}
.dv-rules li{display:grid;grid-template-columns:42px 1fr auto;gap:6px;padding:5px 12px;font-size:12.5px;cursor:pointer;align-items:baseline}
.dv-rules li:hover{background:var(--accent-soft)}
.dv-rn{font-weight:650;color:var(--accent);font-variant-numeric:tabular-nums}
.dv-rt{color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dv-rp{color:var(--faint);font-size:11.5px;font-variant-numeric:tabular-nums}
.dv-main{display:flex;flex-direction:column;gap:8px;min-width:0}
.dv-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--panel);border:1px solid var(--line-strong);border-radius:8px;padding:8px 10px}
.dv-bar .ghost{padding:6px 12px;font-size:13px}
.dv-nav,.dv-find{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted)}
.dv-nav button,.dv-find button{appearance:none;border:1px solid var(--line-strong);background:var(--panel);font:inherit;font-size:14px;width:30px;height:30px;border-radius:5px;cursor:pointer;color:var(--ink)}
.dv-nav button:hover,.dv-find button:hover{border-color:var(--accent);color:var(--accent)}
.dv-pnum{width:64px;text-align:center}
.dv-find{margin-left:auto}
.dv-q{width:200px}
.dv-count{font-size:12px;color:var(--faint);min-width:54px;text-align:right}
.dv-pdf{font-size:12.5px;color:var(--accent);text-decoration:none;white-space:nowrap}
.dv-pdf:hover{text-decoration:underline}
.dv-note{font-size:12.5px;background:#fff8d6;border:1px solid #f0dd8c;color:#5f4b00;border-radius:6px;padding:7px 10px}
.dv-scroll{height:calc(100vh - 260px);min-height:380px;overflow:auto;border:1px solid var(--line-strong);border-radius:8px;background:#e9eae5;padding:14px;scroll-behavior:auto}
.dv-page{background:#fff;max-width:860px;margin:0 auto 14px;border-radius:4px;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.dv-ph{display:flex;justify-content:space-between;align-items:center;padding:7px 14px;border-bottom:1px solid var(--line);font-size:12px;color:var(--faint)}
.dv-ph a{color:var(--accent);text-decoration:none}
.dv-page pre{margin:0;padding:14px 18px 20px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11.5px;line-height:1.5;white-space:pre;overflow-x:auto;color:#222}
.dv-hl{background:#ffe066;color:inherit;border-radius:2px;box-shadow:0 0 0 2px #ffe066;animation:dv-flash 1.4s ease-out 2}
@keyframes dv-flash{0%{background:#ffb703;box-shadow:0 0 0 4px #ffb703}100%{background:#ffe066;box-shadow:0 0 0 2px #ffe066}}
@media (max-width:700px){.s3-env{display:none}}
@media (max-width:980px){.dp-side{max-height:none}}