:root{
  color-scheme:light;
  --bg:#EBEDEA;
  --surface:#FFFFFF;
  --surface-2:#F4F6F3;
  --line:#D6DAD5;
  --line-2:#C2C7C0;
  --ink:#171A18;
  --ink-2:#565C58;
  --ink-3:#868D88;
  --accent:#0E5F58;
  --on-accent:#FFFFFF;
  --accent-soft:#D8EAE7;
  --warn:#9A5B10;
  --scope:#0C0E10;
  --scope-2:#15181B;
  --scope-line:#2C3136;
  --scope-ink:#E7EAE8;
  --scope-ink-2:#9AA2A6;
  --wall:#5E5A50;
  --wall-ext:#4A473F;
  --room-line:#3A3E42;
  --shadow:0 1px 2px rgba(20,26,24,.06), 0 8px 24px -12px rgba(20,26,24,.18);
  --r:10px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0E100F;
    --surface:#171A19;
    --surface-2:#1D2120;
    --line:#282D2B;
    --line-2:#363C39;
    --ink:#E8EBE9;
    --ink-2:#A0A8A4;
    --ink-3:#767E7A;
    --accent:#5CC2B2;
    --on-accent:#0A1918;
    --accent-soft:#123330;
    --warn:#D89A44;
    --shadow:0 1px 2px rgba(0,0,0,.5), 0 10px 30px -14px rgba(0,0,0,.8);
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0E100F;
  --surface:#171A19;
  --surface-2:#1D2120;
  --line:#282D2B;
  --line-2:#363C39;
  --ink:#E8EBE9;
  --ink-2:#A0A8A4;
  --ink-3:#767E7A;
  --accent:#5CC2B2;
  --on-accent:#0A1918;
  --accent-soft:#123330;
  --warn:#D89A44;
  --shadow:0 1px 2px rgba(0,0,0,.5), 0 10px 30px -14px rgba(0,0,0,.8);
}

*{box-sizing:border-box}
img{max-width:100%}
/* several component rules set display, which would otherwise beat the UA [hidden] rule */
[hidden]{display:none!important}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Archivo","Helvetica Neue",Arial,sans-serif;
  font-size:14px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{margin:0;text-wrap:balance;letter-spacing:-.015em}
.mono{font-family:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}

/* ---------- shell ---------- */
.wrap{max-width:1500px;margin:0 auto;padding:22px 20px 64px}
/* two plans side by side want every pixel of a wide screen */
body.two-floors .wrap{max-width:min(1900px,97vw)}
header.top{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  padding-bottom:16px;margin-bottom:18px;border-bottom:1px solid var(--line);flex-wrap:wrap;
}
.brand h1{font-size:26px;font-weight:700}
.brand p{margin:5px 0 0;color:var(--ink-2);max-width:62ch;font-size:13.5px}
.eyebrow{
  font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:6px;
}
.planmeta{display:flex;gap:18px;flex-wrap:wrap}
.planmeta div{text-align:right}
.planmeta .k{font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);font-family:"IBM Plex Mono",monospace}
.planmeta .v{font-size:16px;font-weight:600;font-family:"IBM Plex Mono",monospace;font-variant-numeric:tabular-nums}

.layout{display:grid;grid-template-columns:298px minmax(0,1fr);gap:18px;align-items:start}
@media (max-width:980px){.layout{grid-template-columns:1fr}}

/* ---------- rail ---------- */
.rail{display:flex;flex-direction:column;gap:12px;position:sticky;top:14px}
@media (max-width:980px){.rail{position:static;order:2}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.card > .hd{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:11px 13px;border-bottom:1px solid var(--line);
}
.hd h3{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);font-family:"IBM Plex Mono",monospace;font-weight:600}
.card .bd{padding:13px;display:flex;flex-direction:column;gap:12px}

label.f{display:flex;flex-direction:column;gap:5px}
label.f > span{font-size:11.5px;color:var(--ink-2);display:flex;justify-content:space-between;align-items:baseline;gap:8px}
label.f b{font-family:"IBM Plex Mono",monospace;font-weight:600;color:var(--ink);font-size:12px;font-variant-numeric:tabular-nums}
select,input[type=text]{
  width:100%;padding:7px 9px;border:1px solid var(--line-2);border-radius:7px;
  background:var(--surface-2);color:var(--ink);font:inherit;font-size:13px;
}
select:focus-visible,input:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input[type=range]{width:100%;accent-color:var(--accent);margin:0}

.seg{display:flex;background:var(--surface-2);border:1px solid var(--line-2);border-radius:8px;padding:2px;gap:2px}
.seg button{
  flex:1;padding:6px 4px;border:0;border-radius:6px;background:transparent;color:var(--ink-2);
  font:inherit;font-size:12px;font-weight:500;cursor:pointer;white-space:nowrap;
}
.seg button[aria-pressed=true]{background:var(--accent);color:var(--on-accent);font-weight:600}
.btn{
  padding:8px 11px;border:1px solid var(--line-2);border-radius:8px;background:var(--surface-2);
  color:var(--ink);font:inherit;font-size:12.5px;font-weight:500;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent);font-weight:600}
.btn.primary:hover{filter:brightness(1.08);color:var(--on-accent)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btnrow{display:flex;gap:8px}
.btnrow .btn{flex:1}

.aplist{display:flex;flex-direction:column;gap:7px}
.aprow{
  display:flex;align-items:center;gap:8px;padding:7px 9px;border:1px solid var(--line);
  border-radius:8px;background:var(--surface-2);font-size:12.5px;
}
.aprow.sel{border-color:var(--accent);background:var(--accent-soft)}
.apdot{width:11px;height:11px;border-radius:50%;flex:none;box-shadow:0 0 0 2px var(--surface)}
.aprow .nm{flex:1;font-weight:600}
.aprow .co{font-family:"IBM Plex Mono",monospace;font-size:11px;color:var(--ink-2)}
.aprow .x{border:0;background:transparent;color:var(--ink-3);cursor:pointer;font-size:15px;line-height:1;padding:0 2px}
.aprow .x:hover{color:#c0392b}

.hint{font-size:11.5px;color:var(--ink-3);line-height:1.45}

.chk{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-2);cursor:pointer}
.chk input{accent-color:var(--accent);width:15px;height:15px}

/* ---------- stage ---------- */
.stage{display:flex;flex-direction:column;gap:14px;min-width:0}
.scope{
  position:relative;border-radius:var(--r);overflow:hidden;background:var(--scope);
  border:1px solid var(--line);box-shadow:var(--shadow);
}
#cv{display:block;width:100%;touch-action:none;cursor:crosshair}
.scope.dragging #cv{cursor:grabbing}

.readout{
  position:absolute;left:12px;top:12px;background:rgba(10,12,14,.82);backdrop-filter:blur(6px);
  border:1px solid #2E3439;border-radius:8px;padding:9px 11px;color:var(--scope-ink);
  font-family:"IBM Plex Mono",monospace;font-size:11.5px;line-height:1.65;pointer-events:none;
  min-width:172px;
}
.readout .rk{color:var(--scope-ink-2)}
.readout .big{font-size:19px;font-weight:600;letter-spacing:-.02em;display:block;margin-bottom:2px}
.readout .grade{font-size:10px;letter-spacing:.1em;text-transform:uppercase}

.legend{
  position:absolute;right:12px;bottom:12px;background:rgba(10,12,14,.82);backdrop-filter:blur(6px);
  border:1px solid #2E3439;border-radius:8px;padding:9px 11px;color:var(--scope-ink);
  font-family:"IBM Plex Mono",monospace;font-size:10px;pointer-events:none;
}
.legend .ttl{font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--scope-ink-2);margin-bottom:6px}
.ramp{height:9px;border-radius:3px;margin-bottom:4px;width:210px}
.rampx{display:flex;justify-content:space-between;color:var(--scope-ink-2)}
.bands{display:flex;flex-direction:column;gap:3px}
.bandrow{display:flex;align-items:center;gap:7px;white-space:nowrap}
.bandsw{width:16px;height:9px;border-radius:2px;flex:none}

.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.toolbar .spacer{flex:1}

/* ---------- table ---------- */
.tablewrap{overflow-x:auto;border-radius:var(--r);border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow)}
table{border-collapse:collapse;width:100%;min-width:620px;font-size:13px}
th,td{padding:9px 12px;text-align:right;border-bottom:1px solid var(--line)}
th{
  font-family:"IBM Plex Mono",monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-3);font-weight:600;position:sticky;top:0;background:var(--surface);
}
th:first-child,td:first-child{text-align:left}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover td{background:var(--surface-2)}
td.num{font-family:"IBM Plex Mono",monospace;font-variant-numeric:tabular-nums}
.roomname{border:1px solid transparent;background:transparent;color:var(--ink);font:inherit;font-weight:600;padding:3px 6px;border-radius:6px;width:150px}
.roomname:hover{border-color:var(--line-2)}
.roomname:focus{border-color:var(--accent);background:var(--surface-2);outline:none}
.pill{
  display:inline-flex;align-items:center;gap:5px;padding:2px 8px;border-radius:999px;
  font-size:10.5px;font-weight:600;letter-spacing:.03em;font-family:"IBM Plex Mono",monospace;
  border:1px solid;
}
.bar{height:5px;border-radius:3px;background:var(--line);overflow:hidden;min-width:56px}
.bar i{display:block;height:100%;border-radius:3px}

/* ---------- openings ---------- */
.oplist{display:flex;flex-direction:column;gap:6px;max-height:230px;overflow-y:auto;padding-right:2px}
.oprow{display:flex;align-items:center;gap:7px;font-size:12px}
.oprow .lbl{flex:1;color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.oprow select{width:118px;padding:4px 6px;font-size:11.5px}

/* ---------- notes ---------- */
details.notes{
  margin-top:22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);overflow:hidden;
}
details.notes > summary{
  padding:13px 16px;cursor:pointer;font-weight:600;font-size:13px;list-style:none;
  display:flex;align-items:center;gap:9px;
}
details.notes > summary::-webkit-details-marker{display:none}
details.notes > summary::before{content:"+";font-family:"IBM Plex Mono",monospace;color:var(--accent);font-size:15px}
details.notes[open] > summary::before{content:"–"}
.notesbd{padding:0 16px 18px;border-top:1px solid var(--line);padding-top:14px}
.notesbd h4{margin:16px 0 5px;font-size:12.5px;letter-spacing:.02em}
.notesbd h4:first-child{margin-top:0}
.notesbd p,.notesbd li{color:var(--ink-2);font-size:13px;max-width:72ch}
.notesbd ul{margin:5px 0;padding-left:18px}
.notesbd code{
  font-family:"IBM Plex Mono",monospace;font-size:12px;background:var(--surface-2);
  border:1px solid var(--line);padding:1px 5px;border-radius:5px;color:var(--ink);
}
.eqn{
  font-family:"IBM Plex Mono",monospace;font-size:12.5px;background:var(--surface-2);
  border:1px solid var(--line);border-left:3px solid var(--accent);padding:10px 13px;
  border-radius:7px;margin:9px 0;overflow-x:auto;white-space:pre;color:var(--ink);
}
.notesbd a{color:var(--accent)}
.srclist{columns:2;column-gap:26px;font-size:12px}
@media (max-width:700px){.srclist{columns:1}}
.srclist li{break-inside:avoid;margin-bottom:3px}

@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ---------- import workspace ---------- */
.impdlg{position:fixed;inset:0;z-index:60;background:rgba(8,10,9,.62);backdrop-filter:blur(3px);
  display:flex;align-items:center;justify-content:center;padding:24px}
.impdlg[hidden]{display:none}
.impbox{width:min(1240px,100%);height:min(860px,100%);background:var(--surface);border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden}
.imphd{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid var(--line);flex:0 0 auto}
.imphd h3{font-size:14px;font-weight:700}
.imphd .mono{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:11px;color:var(--ink-3);
  margin-left:auto;text-align:right;font-variant-numeric:tabular-nums}
.impx{border:0;background:none;font-size:22px;line-height:1;color:var(--ink-3);cursor:pointer;padding:0 2px}
.impx:hover{color:var(--ink)}
.impbody{flex:1 1 auto;display:flex;min-height:0}
.impdrop{flex:1 1 auto;margin:16px;border:2px dashed var(--line-2);border-radius:12px;display:flex;
  flex-direction:column;align-items:center;justify-content:center;gap:6px;cursor:pointer;background:var(--surface-2)}
.impdrop:hover,.impdrop.over{border-color:var(--accent);background:var(--accent-soft)}
.impdrop strong{font-size:15px}
.impdrop span{font-size:12.5px;color:var(--ink-3)}
.impstage{flex:1 1 auto;min-width:0;background:var(--scope);display:flex;align-items:center;justify-content:center}
.impstage canvas{display:block;touch-action:none;cursor:crosshair}
.imppanel{flex:0 0 288px;border-left:1px solid var(--line);padding:14px;overflow-y:auto;
  display:flex;flex-direction:column;gap:11px}
.imppanel .seg{margin:0}
.imppanel .btnrow{display:flex;gap:8px}
.imppanel .btnrow .btn{flex:1}
.imphr{height:1px;background:var(--line);margin:2px 0}
.impswatch{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--ink-2)}
.impswatch i{width:22px;height:22px;border-radius:5px;border:1px solid var(--line-2);flex:0 0 auto}
.impcal input[type=number]{width:100%}
.impft{flex:0 0 auto;display:flex;align-items:center;gap:10px;padding:12px 16px;border-top:1px solid var(--line)}
.impft .spacer{flex:1}
.impft .warn{margin:0;font-size:12px;color:var(--warn);max-width:62ch;line-height:1.45}
.impft .warn[hidden]{display:none}
@media (max-width:880px){
  .impbody{flex-direction:column}
  .imppanel{flex:0 0 auto;border-left:0;border-top:1px solid var(--line)}
  .impstage{min-height:280px}
}

/* ---------- floors & stairwells ---------- */
.subhd{display:flex;align-items:center;gap:8px;margin:4px 0 2px;font-size:12px;
  font-weight:600;color:var(--ink-2);text-transform:uppercase;letter-spacing:.06em}
.subhd .btn.sm{margin-left:auto;padding:3px 10px;font-size:11.5px}
.oprow.sel{border-color:var(--accent);background:var(--accent-soft)}
.oprow .co{margin-left:auto;font-size:11px;color:var(--ink-3);
  font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace}
.oprow .x{border:0;background:none;color:var(--ink-3);cursor:pointer;font-size:16px;line-height:1;padding:0 2px}
.oprow .x:hover{color:var(--warn)}
.scope.drawing canvas{cursor:crosshair}
.fl{display:inline-block;min-width:15px;padding:1px 5px;margin-right:7px;border-radius:4px;
  font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:10px;font-weight:600;
  background:var(--surface-2);border:1px solid var(--line);color:var(--ink-3)}
td .rn{display:flex;align-items:center}
.impinto{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--ink-2);white-space:nowrap}
.impinto select{padding:4px 8px;font-size:12px}
.impinto[hidden]{display:none}
/* Two floors: the readout and legend move out of the canvas into a bar above
   it. Floating over the plans, they cost 40% of the width — the panels are
   half-size already and that space is worth more than the overlap. */
.scope.two{display:flex;flex-wrap:wrap;align-items:flex-start}
.scope.two .readout{position:static;order:1;margin:12px 0 10px 12px;flex:0 1 auto}
.scope.two .legend{position:static;order:2;margin:12px 12px 10px auto;flex:0 1 auto}
.scope.two #cv{order:3;flex:0 0 100%;width:100%}

/* ---------- footer, cookie banner, document pages ---------- */
.foot{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:30px;
  padding-top:16px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-3)}
.foot .spacer{flex:1}
.foot a,.linkbtn{color:var(--ink-2);text-decoration:none;border-bottom:1px solid var(--line-2)}
.foot a:hover,.linkbtn:hover{color:var(--accent);border-bottom-color:var(--accent)}
.linkbtn{background:none;border:0;border-bottom:1px solid var(--line-2);padding:0;
  font:inherit;cursor:pointer}

.cbar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:flex;align-items:center;
  gap:16px;flex-wrap:wrap;padding:14px 20px;background:var(--surface);
  border-top:1px solid var(--line);box-shadow:0 -6px 24px -14px rgba(20,26,24,.35)}
.cbar p{margin:0;flex:1 1 320px;font-size:13px;line-height:1.55;color:var(--ink-2)}
.cbar a{color:var(--accent)}
.cbtns{display:flex;gap:8px;flex:0 0 auto}

/* terms and other prose pages */
.doc{max-width:760px}
.doc h2{font-size:15px;margin:26px 0 8px}
.doc p{margin:0 0 11px;font-size:14px;line-height:1.65;color:var(--ink-2)}
.doc a{color:var(--accent)}
.doc .eyebrow a{text-decoration:none}
.doc .top{display:block;margin-bottom:4px}
.doc .top p{margin-top:6px}