:root{
  --paper:#141F2B; --paper2:#0E1721; --line:#2A3E52; --grid:#1B2A3A;
  --ink:#C4D3E0; --muted:#7D93A6; --faint:#4E6478;
  --copper:#E39A4C; --copperHi:#F4B96A;
  --cyan:#71C9D8; --danger:#E2685B;
  --cell:#182636; --cellHi:#20344A;
  --disp:'Saira Condensed', 'Arial Narrow', sans-serif;
  --mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}
*{box-sizing:border-box; margin:0; padding:0}
html,body{height:100%}
body{
  background:var(--paper2); color:var(--ink);
  font-family:var(--mono); font-size:13px;
  display:flex; flex-direction:column;
}

/* ---------- header ---------- */
header{
  display:flex; align-items:center; gap:14px; flex-wrap:wrap;
  padding:10px 16px; border-bottom:1px solid var(--line);
}
header h1{
  font-family:var(--disp); font-weight:700; font-size:22px;
  letter-spacing:.14em; text-transform:uppercase;
}
header h1 .sheet{color:var(--copper); margin-right:10px}
.badge{
  font-size:10px; letter-spacing:.12em; padding:3px 7px;
  border:1px solid var(--faint); color:var(--muted); border-radius:2px;
}
header .spacer{flex:1}
select{
  background:var(--cell); color:var(--ink); border:1px solid var(--line);
  font-family:var(--mono); font-size:12px; padding:6px 8px; border-radius:2px;
  max-width:340px;
}
select:focus-visible{outline:2px solid var(--copper); outline-offset:1px}
.chips{display:flex; gap:6px; flex-wrap:wrap}
.chips button{
  background:none; border:1px solid var(--line); color:var(--muted);
  font-family:var(--mono); font-size:11px; letter-spacing:.06em;
  padding:5px 9px; border-radius:2px; cursor:pointer;
}
.chips button:hover{color:var(--ink); border-color:var(--faint)}
.chips button[aria-pressed="true"]{color:var(--copperHi); border-color:var(--copper)}
.chips button:focus-visible{outline:2px solid var(--copper); outline-offset:1px}

/* ---------- layout ---------- */
main{flex:1; display:grid; grid-template-columns:216px 1fr 292px; min-height:0}
main > *{min-height:0; overflow:auto}

/* ---------- panel schedule ---------- */
#panelCol{border-right:1px solid var(--line); padding:12px}
#panelCol h2, #detailCol h2{
  font-family:var(--disp); font-weight:600; font-size:14px;
  letter-spacing:.16em; text-transform:uppercase; color:var(--muted);
  margin-bottom:10px;
}
.pgrid{display:grid; grid-template-columns:1fr 1fr; gap:3px}
.slot{
  background:var(--cell); border:1px solid transparent; border-radius:2px;
  padding:4px 6px; min-height:34px; display:flex; flex-direction:column; gap:2px;
  font-size:10.5px;
}
.slot .num{color:var(--faint); font-size:9px}
.slot.spare{color:var(--faint)}
.slot .bk{
  display:flex; gap:5px; align-items:baseline; width:100%;
  background:none; border:none; color:var(--ink); font-family:var(--mono);
  font-size:10.5px; text-align:left; cursor:pointer; padding:1px 0; border-radius:2px;
}
.slot .bk .amps{color:var(--copper); font-weight:600; flex:none}
.slot .bk .lbl{overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.slot .bk:hover .lbl{color:#fff}
.slot .bk:focus-visible{outline:2px solid var(--copper); outline-offset:1px}
.slot .bk.inert{cursor:default; color:var(--muted)}
.slot.lit{border-color:var(--copper); background:var(--cellHi)}
.slot.lit .lbl{color:var(--copperHi)}
.slot.mwbc{border-color:var(--danger)}
.slot.mwbc .lbl{color:var(--danger)}
.pnote{margin-top:10px; font-size:10px; color:var(--faint); line-height:1.5}

/* ---------- plan ---------- */
#planWrap{background:var(--paper); position:relative; display:flex}
#planWrap svg{width:100%; height:100%; display:block}
text{user-select:none}
.roomlab{
  font-family:var(--disp); font-weight:600; font-size:11px;
  letter-spacing:.28em; fill:var(--faint); text-anchor:middle; text-transform:uppercase;
}
.legend text{font-family:var(--mono); font-size:6.5px; fill:var(--muted)}
.legend .sym{stroke:var(--muted)}
.wall{fill:none; stroke:var(--ink); stroke-width:1.6}
.outer{stroke-width:2.6}
.doorgap{stroke:var(--paper); stroke-width:3.6}
.device{cursor:pointer; outline:none}
.device .hit{fill:transparent; stroke:none}
.device .sym{stroke:var(--ink); stroke-width:1.2; fill:none}
.device .sym text, .device text.sym{fill:var(--ink); stroke:none}
.device .sletter{
  font-family:var(--disp); font-weight:600; font-size:11px; fill:var(--ink);
  text-anchor:middle; dominant-baseline:middle;
}
.device .tag{font-family:var(--mono); font-size:5.5px; fill:var(--faint)}
.device .ctag{font-family:var(--mono); font-size:6px; fill:var(--faint)}
.device .halo{fill:none; stroke:none}
.device:hover .sym, .device:hover .sletter{stroke:var(--copperHi); fill:var(--copperHi)}
.device:hover text.sym, .device:hover .slabel{fill:var(--copperHi)}
.device:focus-visible .halo{stroke:var(--muted); stroke-dasharray:2 2}
.device.lit .sym{stroke:var(--copperHi)}
.device.lit .sletter, .device.lit text.sym{fill:var(--copperHi)}
.device.lit .ctag{fill:var(--copper)}
.device.lit .halo{stroke:var(--copper); animation:pulse 1.6s ease-in-out infinite}
.device.ctl .halo{stroke:var(--cyan); stroke-dasharray:3 2}
.device.mwbc .halo{stroke:var(--danger); stroke-dasharray:2 3}
.device.dim{opacity:.16; pointer-events:none}
@keyframes pulse{0%,100%{stroke-opacity:1}50%{stroke-opacity:.35}}
@media (prefers-reduced-motion: reduce){ .device.lit .halo{animation:none} }
.panelglyph .sym{stroke:var(--muted); fill:var(--cell)}
.panelglyph text{font-family:var(--mono); font-size:6px; fill:var(--muted); text-anchor:middle}

/* ---------- detail ---------- */
#detailCol{border-left:1px solid var(--line); padding:12px}
#detailCol .dhead{display:flex; align-items:baseline; gap:8px}
#detailCol .dhead h2{flex:1; margin-bottom:0}
#clearBtn{
  background:none; border:1px solid var(--line); color:var(--muted);
  font-family:var(--mono); font-size:10px; padding:3px 8px; cursor:pointer; border-radius:2px;
}
#clearBtn:hover{color:var(--ink)}
#detail{margin-top:12px; line-height:1.55}
#detail .title{
  font-family:var(--disp); font-weight:600; font-size:19px; letter-spacing:.04em;
  color:#fff; margin-bottom:2px;
}
#detail .sub{color:var(--copper); font-size:11px; letter-spacing:.08em; margin-bottom:12px}
#detail dl{display:grid; grid-template-columns:82px 1fr; gap:4px 10px; font-size:11.5px}
#detail dt{color:var(--faint); text-transform:uppercase; font-size:9.5px; letter-spacing:.1em; padding-top:2px}
#detail dd a, #detail dd button{
  background:none; border:none; padding:0; color:var(--cyan); font-family:var(--mono);
  font-size:11.5px; cursor:pointer; text-decoration:underline; text-underline-offset:2px; text-align:left;
}
#detail .warn{
  margin-top:14px; border:1px solid var(--danger); border-left-width:4px;
  padding:8px 10px; font-size:11px; color:#F0B3AA; border-radius:2px;
}
#detail .warn b{color:var(--danger); letter-spacing:.08em; font-size:10px}
#detail .devlist{margin-top:6px; display:flex; flex-direction:column; gap:3px}
#detail .empty{color:var(--muted); font-size:12px; line-height:1.7}
#detail .note{margin-top:12px; font-size:10.5px; color:var(--muted); border-top:1px dashed var(--line); padding-top:8px}

/* ---------- title block ---------- */
footer{
  border-top:3px double var(--line); display:flex; flex-wrap:wrap;
  font-size:9.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--muted);
}
footer .tb{padding:8px 14px; border-right:1px solid var(--line)}
footer .tb b{display:block; color:var(--faint); font-size:8px; margin-bottom:2px}
footer .tb span{color:var(--ink)}

@media (max-width: 960px){
  main{grid-template-columns:1fr; grid-template-rows:60vh auto auto}
  #planWrap{order:1} #panelCol{order:2; border-right:none; border-top:1px solid var(--line)}
  #detailCol{order:3; border-left:none; border-top:1px solid var(--line)}
}

/* ---------- sheet tabs (rev B) ---------- */
#sheetTabs{
  display:flex; gap:2px; padding:0 16px; border-bottom:1px solid var(--line);
  background:var(--paper2); overflow-x:auto;
}
#sheetTabs .tab{
  display:flex; align-items:baseline; gap:7px; position:relative;
  background:none; border:none; border-bottom:2px solid transparent;
  padding:8px 12px 7px; cursor:pointer; font-family:var(--mono); white-space:nowrap;
}
#sheetTabs .tab .sheetno{
  font-family:var(--disp); font-weight:700; font-size:14px; letter-spacing:.08em;
  color:var(--muted);
}
#sheetTabs .tab .sheetname{font-size:11px; color:var(--faint); letter-spacing:.06em}
#sheetTabs .tab:hover .sheetname{color:var(--ink)}
#sheetTabs .tab.active{border-bottom-color:var(--copper)}
#sheetTabs .tab.active .sheetno{color:var(--copper)}
#sheetTabs .tab.active .sheetname{color:var(--ink)}
#sheetTabs .tab .badge{
  font-size:9px; color:var(--paper2); background:var(--copper); border:none;
  border-radius:8px; padding:1px 5px; letter-spacing:0;
}
#sheetTabs .tab:focus-visible{outline:2px solid var(--copper); outline-offset:-2px}

#panelSel{width:100%; margin-bottom:8px}
#schedMeta{margin-bottom:10px}

.room-shell{stroke-width:2.6}
.room-ext{stroke-dasharray:5 3; stroke-width:1.2; stroke:var(--muted)}
.room-ref{stroke:var(--faint); stroke-width:1; stroke-dasharray:2 3}
.feeder{fill:none; stroke:var(--copper); stroke-width:1.6; stroke-dasharray:8 4}
.feederlab{font-family:var(--mono); font-size:6.5px; fill:var(--copper)}
.slabel{font-family:var(--mono); font-size:6px; fill:var(--ink); text-anchor:middle; dominant-baseline:middle}
.sheetref{
  font-size:9px; color:var(--copper); border:1px solid var(--copper);
  border-radius:2px; padding:0 3px; margin-left:4px;
}
.unknown{color:var(--muted); font-style:italic}
.planEmpty{
  margin:auto; text-align:center; color:var(--muted); font-size:13px; padding:40px;
}
.planEmpty .sub{margin-top:8px; font-size:11px; color:var(--faint); max-width:420px}