:root {
  --bg: #ffffff; --ink: #15171c; --mute: #6b7280; --faint: #9ca3af; --line: #e6e8ec; --soft: #f5f6f8;
  --accent: #2f5bea; --accent-soft: #e8eefe; --ok: #15803d; --bad: #b91c1c; --warn: #a16207;
  --stage: #eef0f3;
  --micro: 11px; --small: 12px; --body: 13px; --lead: 15px; --title: 18px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111317; --ink: #e8eaee; --mute: #9aa1ad; --faint: #6b7280; --line: #262a31; --soft: #1a1d22;
    --accent: #6d8cff; --accent-soft: #1e2640; --ok: #4ade80; --bad: #f87171; --warn: #fbbf24; --stage: #181b20;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font: var(--body)/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--ink); background: var(--bg);
  display: grid; grid-template-columns: 330px minmax(0, 1fr) 340px; overflow: hidden;
}
aside { overflow-y: auto; padding: 16px 16px 40px; }
#controls { border-right: 1px solid var(--line); }
#results { border-left: 1px solid var(--line); }
h1 { font-size: var(--title); margin: 0; }
h2 { font-size: var(--micro); text-transform: uppercase; letter-spacing: .07em; color: var(--mute); margin: 22px 0 8px; font-weight: 600; }
.sub { color: var(--mute); font-size: var(--small); }

/* controls */
.field { display: grid; grid-template-columns: 1fr 76px; align-items: center; gap: 4px 10px; margin: 8px 0; }
.field label { font-size: var(--small); }
.field label small { color: var(--mute); display: block; font-size: var(--micro); }
.field input[type=range] { grid-column: 1 / -1; width: 100%; accent-color: var(--accent); margin: 0; }
input[type=number], select {
  font: inherit; font-size: var(--small); color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: 4px 6px; width: 100%; min-width: 0;
}
input[type=number] { text-align: right; font-variant-numeric: tabular-nums; }
select { width: 100%; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; width: 100%; }
.seg button { flex: 1; border: 0; background: var(--bg); color: var(--ink); font: inherit; font-size: var(--small); padding: 5px 6px; cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.on { background: var(--ink); color: var(--bg); }
.mix { width: 100%; border-collapse: collapse; font-size: var(--small); }
.mix th { text-align: left; font-weight: 500; color: var(--mute); font-size: var(--micro); padding: 2px 4px; }
.mix td { padding: 3px 4px; }
.mix td:first-child { white-space: nowrap; }
.swatch { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }
.warn { color: var(--warn); font-size: var(--micro); }

/* centre */
main { display: grid; grid-template-rows: auto 1fr; min-width: 0; min-height: 0; }
#options { display: flex; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--line); overflow-x: auto; }
.opt { flex: 0 0 190px; text-align: left; border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; cursor: pointer; background: var(--bg); color: var(--ink); font: inherit; }
.opt.on { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); background: var(--accent-soft); }
.opt b { font-size: var(--body); }
.opt .m { color: var(--mute); font-size: var(--micro); margin-top: 2px; font-variant-numeric: tabular-nums; }
.opt .big { font-size: var(--lead); font-weight: 650; margin-top: 4px; }
.bar { height: 3px; background: var(--line); border-radius: 2px; margin-top: 6px; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 2px; }
#stage { position: relative; min-height: 0; background: var(--stage); }
#c { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
#labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.lbl { font-size: 10px; line-height: 1.15; text-align: center; color: #111; background: #ffffffd9; border-radius: 4px; padding: 1px 4px; white-space: nowrap; }
.lbl b { font-size: 11px; }
.lbl.core { background: #374151d9; color: #fff; }
#levels { position: absolute; right: 12px; top: 12px; bottom: 12px; display: flex; flex-direction: column; gap: 3px; overflow-y: auto; }
#levels button { min-width: 52px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 7px; padding: 5px 8px; font: inherit; font-size: var(--small); cursor: pointer; font-variant-numeric: tabular-nums; }
#levels button.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
#viewbar { position: absolute; left: 12px; top: 12px; display: flex; gap: 6px; }
#viewbar .seg { width: auto; background: var(--bg); }
#legend { position: absolute; left: 12px; bottom: 12px; background: color-mix(in srgb, var(--bg) 92%, transparent); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; font-size: var(--micro); display: grid; gap: 3px; }
#floorcard { position: absolute; right: 80px; bottom: 12px; background: color-mix(in srgb, var(--bg) 92%, transparent); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; font-size: var(--small); min-width: 200px; }
#floorcard:empty { display: none; }
#floorcard b { font-size: var(--lead); }

/* results */
table.t { width: 100%; border-collapse: collapse; font-size: var(--small); }
table.t td { padding: 5px 4px; border-top: 1px solid var(--line); vertical-align: top; }
table.t td.n { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; font-weight: 600; }
.kpis { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.kpis div { background: var(--soft); border-radius: 8px; padding: 7px 9px; }
.kpis span { display: block; font-size: var(--micro); color: var(--mute); }
.kpis b { font-size: var(--lead); font-variant-numeric: tabular-nums; }
.pass { color: var(--ok); } .fail { color: var(--bad); } .info, .not-checked { color: var(--mute); }
.unv { font-size: 10px; color: var(--warn); border: 1px solid currentColor; border-radius: 4px; padding: 0 3px; margin-left: 4px; white-space: nowrap; }
.src { color: var(--mute); font-size: var(--micro); font-weight: 400; }
.empty { padding: 24px; color: var(--mute); }
.timing { color: var(--faint); font-size: var(--micro); margin-top: 6px; }

@media (max-width: 1100px) {
  body { grid-template-columns: 300px minmax(0, 1fr); }
  #results { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); }
  body { overflow: auto; height: auto; }
  main { height: 80vh; }
}
@media (max-width: 720px) {
  body { grid-template-columns: 1fr; }
  main { order: -1; height: 70vh; }
  #controls { border-right: 0; }
  #floorcard { display: none; }
}

/* plot import */
.btn { display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 8px; padding: 6px 8px; font: inherit; font-size: var(--small); cursor: pointer; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
textarea { width: 100%; margin-top: 8px; font: 12px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; resize: vertical; }
.pick { display: grid; grid-template-columns: auto 1fr; gap: 0 8px; align-items: center; padding: 5px 0; border-top: 1px solid var(--line); font-size: var(--small); cursor: pointer; }
.pick .src { grid-column: 2; }
.edges { display: grid; gap: 4px; }
.edge { display: grid; grid-template-columns: 34px 58px 1fr; align-items: center; gap: 6px; font-size: var(--small); }
.edge .len { font-variant-numeric: tabular-nums; color: var(--mute); text-align: right; }
.edge .seg button { padding: 3px 4px; font-size: var(--micro); }
.tag { display: inline-block; text-align: center; border-radius: 5px; padding: 1px 4px; font-size: var(--micro); font-weight: 600; color: #fff; }
.k-aliniament { background: #d03b3b; } .k-lateral { background: #6b7280; } .k-posterior { background: #7c3aed; }
.lbl.edgetag { color: #fff; font-weight: 600; padding: 1px 5px; }
a { color: var(--accent); }
.lbl.entry { background: #16a34a; color: #fff; font-weight: 600; }
.lbl.corr { background: #f1e3c2e6; color: #5b4a24; }
.lbl.ramp { background: #e0a23b; color: #fff; font-weight: 600; }
.lbl.room { background: transparent; color: #374151; font-size: 9px; padding: 0; }
.lbl.flat { line-height: 1.2; }
.lbl .nosun { color: #dc2626; font-weight: 600; }

.notice { margin-top: 10px; padding: 8px 10px; border-radius: 8px; background: var(--soft); font-size: var(--micro); color: var(--mute); line-height: 1.45; }
.notice b { color: var(--ink); }

/* print: the selected option, its plan and its numbers; no controls */
@media print {
  body { display: block; height: auto; overflow: visible; background: #fff; color: #000; }
  #controls, #viewbar, #levels, #options .timing { display: none !important; }
  #options { border: 0; flex-wrap: wrap; }
  #options .opt:not(.on) { display: none; }
  main { display: block; height: auto; }
  #stage { height: 120mm; break-inside: avoid; }
  #results { border: 0; overflow: visible; }
  table.t td { padding: 3px 4px; }
}
.lbl.hmax { background: #b45309; color: #fff; font-weight: 600; }

.optbar { flex: 0 0 auto; display: flex; flex-direction: column; gap: 6px; justify-content: center; padding-left: 4px; }
.optbar select { width: auto; margin-top: 2px; }
dialog.compare { max-width: min(1200px, 96vw); width: 100%; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); color: var(--ink); padding: 16px; }
dialog.compare::backdrop { background: #0008; }
dialog.compare .dhead { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
dialog.compare table { font-size: var(--small); }
dialog.compare th { text-align: right; font-weight: 500; color: var(--mute); cursor: pointer; padding: 4px; white-space: nowrap; }
dialog.compare th:first-child { text-align: left; }
dialog.compare th.on { color: var(--ink); }
dialog.compare tr[data-k] { cursor: pointer; }
dialog.compare tr[data-k]:hover td { background: var(--soft); }
dialog.compare td.best { color: var(--ok); }
label.check { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px; font-size: var(--small); margin: 8px 0; cursor: pointer; }
label.check small { flex-basis: 100%; padding-left: 22px; color: var(--mute); font-size: var(--micro); }
.row4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-top: 6px; }
label.mini { display: grid; gap: 2px; font-size: var(--micro); color: var(--mute); }
.range { border: 1px solid var(--line); border-radius: 8px; padding: 8px; margin-top: 8px; display: grid; gap: 6px; }

/* presentation report */
#reportView { position: fixed; inset: 0; z-index: 50; overflow: auto; background: #fff; color: #15171c; }
#reportView .rbar { position: sticky; top: 0; display: flex; gap: 8px; justify-content: flex-end; padding: 10px 16px; background: #fffe; border-bottom: 1px solid #e5e7eb; }
#reportView .rbar .btn { background: #fff; color: #15171c; border-color: #d1d5db; }
#reportView .rbar .btn.primary { background: #2f5bea; color: #fff; }

    #reportView .report{font:12px/1.45 system-ui,sans-serif;color:#15171c;margin:0;padding:24px 28px;max-width:820px}
    #reportView h1{font-size:22px;margin:0}#reportView h2{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:#6b7280;margin:22px 0 6px}
    #reportView .sub{color:#6b7280}#reportView .grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}#reportView img{width:100%;border:1px solid #e5e7eb;border-radius:6px;background:#eef0f3}
    #reportView table{width:100%;border-collapse:collapse}#reportView td{padding:4px;border-top:1px solid #e5e7eb;vertical-align:top}#reportView td.n{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
    #reportView .kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}#reportView .kpis div{background:#f5f6f8;border-radius:6px;padding:6px 8px}#reportView .kpis b{display:block;font-size:15px}
    #reportView .fail{color:#b91c1c}#reportView .pass{color:#15803d}#reportView .note{font-size:10px;color:#6b7280}
  
@media print { @page { size: A4; margin: 12mm; } body.report-open > *:not(#reportView) { display: none !important; } body.report-open { display: block; overflow: visible; height: auto; } body.report-open #reportView { position: static; overflow: visible; } body.report-open #reportView .rbar { display: none; } }
.gauges { display: grid; gap: 6px; margin-bottom: 10px; }
.gauge .glabel { display: flex; justify-content: space-between; font-size: var(--small); }
.gauge .glabel b { font-variant-numeric: tabular-nums; }
.gbar { height: 6px; border-radius: 3px; background: var(--line); margin-top: 3px; overflow: hidden; }
.gbar i { display: block; height: 100%; border-radius: 3px; }
.gauge.good .gbar i { background: #16a34a; } .gauge.under .gbar i { background: #d97706; } .gauge.over .gbar i { background: #dc2626; }
.gauge.over .glabel b { color: var(--bad); }
table.sens { margin-top: 6px; }
table.sens th { font-weight: 500; color: var(--mute); font-size: var(--micro); text-align: right; padding: 3px 4px; }
table.sens th:first-child { text-align: left; }
details.box { border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; margin-top: 8px; }
details.box summary { cursor: pointer; font-size: var(--small); font-weight: 600; }
input[type=text] { font: inherit; font-size: var(--small); color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 4px 6px; width: 100%; }
#reportView .rbrand { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; font-weight: 600; }
#reportView .rbrand img { max-height: 36px; width: auto; border: 0; background: none; }

/* the workflow as numbered steps that fold */
details.step { border-top: 1px solid var(--line); margin: 0; padding: 4px 0 6px; }
details.step:first-of-type { margin-top: 14px; }
details.step > summary { list-style: none; cursor: pointer; display: flex; align-items: baseline; gap: 8px; padding: 10px 0 6px; font-weight: 600; font-size: var(--lead); }
details.step > summary::-webkit-details-marker { display: none; }
details.step > summary .n { flex: none; width: 20px; height: 20px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-size: var(--micro); display: inline-grid; place-items: center; align-self: center; }
details.step > summary small { color: var(--mute); font-weight: 400; font-size: var(--micro); margin-left: auto; text-align: right; }
details.step > summary::after { content: "▸"; color: var(--faint); font-size: var(--small); }
details.step[open] > summary::after { content: "▾"; }
details.step h2:first-of-type { margin-top: 8px; }
.notice details.more { display: inline; }
.notice details.more summary { display: inline; cursor: pointer; color: var(--accent); }
.notice details.more[open] summary { display: block; margin-bottom: 4px; }
#legend { display: block; }
#legend summary { cursor: pointer; font-weight: 600; color: var(--mute); }
#legend .lrows { display: grid; gap: 3px; margin-top: 4px; }
a.verdict { display: block; padding: 8px 10px; border-radius: 8px; margin: 0 0 10px; font-size: var(--small); font-weight: 600; text-decoration: none; }
a.verdict.pass { background: color-mix(in srgb, var(--ok) 12%, transparent); color: var(--ok); }
a.verdict.fail { background: color-mix(in srgb, var(--bad) 12%, transparent); color: var(--bad); }
dialog.compare th.l { text-align: left; }
dialog.compare th:hover { color: var(--ink); }

/* one flat as a plan */
dialog.flatplan { max-width: min(1280px, 96vw); }
dialog.flatplan .fp { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 18px; align-items: start; }
dialog.flatplan .fpsvg { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 6px; }
dialog.flatplan .fpsvg svg { width: 100%; height: auto; max-height: 76vh; display: block; }
dialog.flatplan .zones { display: flex; flex-wrap: wrap; gap: 6px 12px; font-size: var(--small); }
dialog.flatplan .zones i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 5px; vertical-align: -2px; border: 1px solid #0002; }
dialog.flatplan .row { display: flex; align-items: center; }
dialog.flatplan button:disabled { opacity: .35; cursor: default; }
@media (max-width: 760px) { dialog.flatplan .fp { grid-template-columns: 1fr; } }
#reportView .flatcard { border: 1px solid #e5e7eb; border-radius: 6px; padding: 8px; font-size: 12px; break-inside: avoid; }
#reportView .flatcard svg { display: block; margin-top: 6px; }