:root{
  --paper:#ffffff; --surface:#f6f6f6; --ink:#111111; --muted:#6b6b6b;
  --board:#161616; --board-ink:#f2f2f2; --board-line:#3a3a3a;
  --line:#e4e4e4; --accent:#C2410C; --accent-ink:#ffffff;
  --note:#C2410C; --note-ink:#ffffff; --pen:#b3261e; --pen-soft:#f6e3e1;
  --f1:#2563EB; --f2:#7C3AED; --f3:#0D9488; --f4:#DB2777;
  --shadow:none;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark){
  :root{
    --paper:#0f0f0f; --surface:#171717; --ink:#f2f2f2; --muted:#9a9a9a;
    --board:#1c1c1c; --board-ink:#f2f2f2; --board-line:#3a3a3a;
    --line:#262626; --accent:#FB923C; --accent-ink:#0f0f0f;
    --note:#FB923C; --note-ink:#0f0f0f; --pen:#ff7b72; --pen-soft:#3a1f1d;
    --f1:#60A5FA; --f2:#A78BFA; --f3:#2DD4BF; --f4:#F472B6;
  }
}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
button{font:inherit;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{text-wrap:balance}

header{background:var(--paper);color:var(--ink);padding:0 22px;border-bottom:1px solid var(--line)}
.head-in{max-width:1220px;margin:0 auto}
.head-top{display:flex;flex-wrap:wrap;gap:4px 20px;align-items:baseline;justify-content:space-between}
h1{font:600 clamp(24px,3.5vw,31px)/1.1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;margin:0}
.brand{font-size:11px;letter-spacing:.12em;text-transform:uppercase;opacity:.65}
.tagline{margin:2px 0 12px;opacity:.72;font-size:14px}
.tabs{display:flex;gap:2px;flex-wrap:wrap}
.tab{border:0;background:transparent;color:var(--muted);opacity:1;padding:9px 16px;border-bottom:2px solid transparent;margin-bottom:-1px;
  border-radius:8px 8px 0 0;font-weight:700;font-size:14px}
.tab[aria-selected="true"]{background:transparent;color:var(--ink);border-bottom-color:var(--accent)}
.tab:focus-visible{outline:2px solid var(--ink);outline-offset:-2px}

.shell{max-width:1220px;margin:0 auto;padding:18px 22px 40px}
.view{display:none}.view.on{display:block}
.cols{display:grid;grid-template-columns:280px minmax(0,1fr);gap:18px;align-items:start}
@media(max-width:840px){.cols{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px;box-shadow:var(--shadow)}
.panel h2{font:600 12px/1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.panel+.panel{margin-top:14px}
.btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:8px;padding:7px 11px;font-weight:600}
.btn:hover{border-color:var(--accent)}
.btn:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn-note{background:var(--note);border-color:var(--note);color:var(--note-ink)}
.btn-sm{padding:4px 8px;font-size:13px}
.btn-row{display:flex;flex-wrap:wrap;gap:7px}
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:10px}
.field label{font-size:12.5px;font-weight:700;color:var(--muted)}
select,input[type=text],input[type=email],input[type=number]{border:1px solid var(--line);border-radius:8px;background:var(--paper);padding:7px 10px;width:100%}
textarea{width:100%;min-height:120px;border:1px solid var(--line);border-radius:8px;background:var(--paper);padding:9px;resize:vertical;line-height:1.55}
.hint{font-size:12.5px;color:var(--muted);margin:8px 0 0;line-height:1.45}
.bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:10px}
.bar .sp{flex:1}
.chip{font-size:12.5px;background:var(--paper);border:1px solid var(--line);border-radius:99px;padding:3px 10px;color:var(--muted)}

/* ---------- room canvas ---------- */
.stage-wrap{background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:10px 10px 4px;overflow:hidden}
.axis{font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--muted);text-align:center;padding:5px 0}
.stage-scale{position:relative;margin:0 auto}
.stage{position:absolute;inset:0;transform-origin:0 0;background:
  linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:32px 32px;background-position:-1px -1px;border-radius:8px;outline:1.5px solid var(--line)}
.stage.noGrid{background:none}
.it{position:absolute;border-radius:7px;display:flex;align-items:center;justify-content:center;
  font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);user-select:none;-webkit-user-select:none}
.it .lbl{pointer-events:none}
.builder .it{cursor:grab;touch-action:none}
.it.desk{background:var(--paper);border:1.5px dashed var(--line)}
.it.tdesk{background:var(--board);color:var(--board-ink);border:1.5px solid var(--board-line)}
.it.board{background:var(--board);color:var(--board-ink);letter-spacing:.3em}
.it.door{background:var(--surface);border:1.5px solid var(--muted)}
.it.window{background:linear-gradient(180deg,transparent 40%,var(--line) 40%,var(--line) 60%,transparent 60%);border:1.5px solid var(--line)}
.it.col{background:var(--line);border-radius:50%}
.it.sink{background:var(--surface);border:1.5px solid var(--line);border-radius:50%}
.it.sel{outline:2.5px solid var(--note);outline-offset:2px}
.card{position:absolute;inset:0;border-radius:7px;border:1.5px solid var(--line);background:var(--surface);
  box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:2px;user-select:none;-webkit-user-select:none;touch-action:none;cursor:grab;overflow:hidden}
.card .nm{font:600 13px/1.05 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;text-transform:none;letter-spacing:0;text-align:center;overflow-wrap:anywhere;color:var(--ink)}
.card.selq{background:var(--note);border-color:var(--note)}
.card.selq .nm{color:var(--note-ink)}
.card.conf{border-color:var(--pen)}
.card.conf .nm{text-decoration:underline wavy var(--pen) 1.5px;text-underline-offset:3px}
.card.pin::after{content:"★";position:absolute;top:1px;right:4px;font-size:10px;color:var(--accent)}
.flagbar{position:absolute;left:0;top:0;bottom:0;width:6px;display:flex;flex-direction:column}
.flagbar i{flex:1}
.disp-hide-flags .flagbar{display:none}
.seat-hilite{outline:2.5px solid var(--accent);outline-offset:2px}
.ghost{position:fixed;pointer-events:none;z-index:90;width:96px;height:56px;transform:translate(-50%,-55%) rotate(-2deg)}
.ghost .nm{font-size:17px}
.tray{display:flex;flex-wrap:wrap;gap:8px;min-height:44px;margin-top:10px}
.tray .tcard{position:relative;width:96px;height:44px;border:1.5px solid var(--line);border-radius:7px;
  background:var(--surface);box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center;
  cursor:grab;user-select:none;touch-action:none}
.tray .tcard .nm{text-transform:none;font:600 14px/1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
.tray .tcard.selq{background:var(--note);border-color:var(--note)}
.warn{display:flex;gap:8px;align-items:center;background:var(--pen-soft);border:1px solid var(--pen);
  border-radius:9px;padding:8px 12px;font-size:13.5px;margin-bottom:10px}
.warn b{color:var(--pen)}

/* rules & class editor */
.rule-list{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.rule-list li{display:flex;align-items:center;gap:8px;font-size:13.5px;background:var(--paper);
  border:1px solid var(--line);border-radius:8px;padding:5px 9px}
.rule-list li.broken{border-color:var(--pen);background:var(--pen-soft)}
.rule-list .x{margin-left:auto;border:0;background:none;color:var(--muted);font-size:15px;padding:1px 4px}
.rule-list .x:hover{color:var(--pen)}
.pupil-list{list-style:none;margin:10px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:6px}
@media(max-width:1020px){.pupil-list{grid-template-columns:1fr}}
.pupil-list li{display:flex;align-items:center;gap:8px;background:var(--paper);border:1px solid var(--line);
  border-radius:8px;padding:5px 9px;font-size:14px}
.fdot{width:14px;height:14px;border-radius:50%;border:1.5px solid var(--line);background:var(--surface);cursor:pointer;flex:none;padding:0}
.fdot.f1{background:var(--f1);border-color:var(--f1)}.fdot.f2{background:var(--f2);border-color:var(--f2)}
.fdot.f3{background:var(--f3);border-color:var(--f3)}.fdot.f4{background:var(--f4);border-color:var(--f4)}
.flagkey{display:flex;flex-direction:column;gap:6px;margin-top:8px}
.flagkey .row{display:flex;align-items:center;gap:8px}
.flagkey input{padding:4px 8px;font-size:13px}
.legend{display:flex;flex-wrap:wrap;gap:10px;font-size:12.5px;color:var(--muted);margin-top:8px}
.legend span{display:flex;align-items:center;gap:5px}
.legend i{width:10px;height:10px;border-radius:50%;display:inline-block}

/* ---------- display overlay ---------- */
.overlay{position:fixed;inset:0;background:var(--board);color:var(--board-ink);z-index:100;display:none;
  flex-direction:column;align-items:center;padding:14px}
.overlay.on{display:flex}
.ov-bar{width:100%;max-width:1400px;display:flex;gap:10px;align-items:center}
.ov-bar .ttl{font:600 22px/1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;margin-right:auto}
.ov-btn{border:1px solid var(--board-line);background:rgba(255,255,255,.07);color:var(--board-ink);
  border-radius:8px;padding:8px 14px;font-weight:700}
.ov-btn[aria-pressed="true"]{background:var(--note);color:var(--note-ink);border-color:var(--note)}
.ov-stage-outer{flex:1;width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:0}
.ov-axis{font-size:13px;letter-spacing:.3em;text-transform:uppercase;opacity:.6;padding:6px}
.ov-scale{position:relative}
.ov-scale .stage{outline-color:var(--board-line);background:none}
.ov-scale .it.desk{border-color:var(--board-line)}
.ov-scale .card{background:#FDFBF4;border-color:#FDFBF4}
.ov-scale .card .nm{color:#111;font-size:16px;line-height:1.05}
/* Flip swaps positions (x -> W - x - w) in the render; text never mirrors. */
/* big tool overlay */
.big{font:600 clamp(80px,22vw,240px)/1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-variant-numeric:tabular-nums}
.big-sub{font:600 clamp(26px,6vw,64px)/1.15 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;opacity:.9;text-align:center;overflow-wrap:anywhere;max-width:90vw}
.ov-center{flex:1;display:flex;flex-direction:column;gap:18px;align-items:center;justify-content:center}
.pulse{animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.35}}

/* tools grid */
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px}
.tool h3{font:600 19px/1.2 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;margin:0 0 4px}
.tool p{margin:0 0 10px;font-size:13.5px;color:var(--muted)}
.time-ro{font:600 40px/1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-variant-numeric:tabular-nums;margin:6px 0 10px}
.laps{font-size:13px;color:var(--muted);margin:8px 0 0;padding-left:18px}
.groups-out{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.group-card{background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:9px 12px;min-width:130px}
.group-card b{font:600 15px/1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
.group-card ul{margin:6px 0 0;padding:0;list-style:none;font:600 17px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}

/* form time */
.bigq{font:600 21px/1.35 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;margin:2px 0 8px;min-height:56px}
.reveal{font-size:15px;font-weight:700;color:var(--accent);margin:0 0 10px;min-height:22px}
.flagbox{display:flex;justify-content:center;margin:6px 0 10px}
.flagimg{max-width:100%;height:150px;width:auto;border-radius:4px;outline:1px solid var(--line);background:#fff}
.flag{width:180px;height:120px;border-radius:4px;overflow:hidden;outline:1px solid var(--line);
  position:relative;display:flex;box-shadow:var(--shadow)}
.flag.h{flex-direction:column}
.flag .s{flex:1}
.flag .ov{position:absolute}
.tiles{display:flex;flex-wrap:nowrap;gap:5px;margin:8px 0 10px}
.tiles span{flex:1 1 0;min-width:0;height:60px;padding:0 4px;background:var(--board);color:var(--board-ink);border-radius:6px;
  display:flex;align-items:center;justify-content:center;font:700 clamp(16px,2.4vw,30px)/1 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  text-transform:uppercase;font-variant-numeric:tabular-nums}
.tiles.nums span{background:var(--surface);color:var(--ink);border:1.5px solid var(--line)}
.tiles.nums span.target{background:var(--pen);color:#fff;border-color:var(--pen);flex:1.6 1 0}
.form4{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
@media(min-width:900px){.form4{grid-template-columns:repeat(3,1fr)}}
.form4 .wide{grid-column:1/-1}
.nm-sm{font-size:11px!important}
.ov-scale .card .nm.nm-sm{font-size:13px!important}

/* lead bar */
.leadbar{background:var(--board);color:var(--board-ink);border-radius:12px;padding:18px 20px;
  display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center;box-shadow:var(--shadow);margin-top:18px}
.leadbar h2{font:600 19px/1.25 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;margin:0;flex:1 1 250px}
.leadbar p{margin:4px 0 0;font-size:13px;opacity:.75;max-width:46ch}
.leadform{display:flex;gap:8px;flex-wrap:wrap}
.leadform input{border:1px solid var(--board-line);background:rgba(255,255,255,.08);color:var(--board-ink);
  border-radius:8px;padding:9px 12px;min-width:200px}
.leadform input::placeholder{color:var(--board-ink);opacity:.55}
.lead-ok{font-size:13.5px;background:rgba(255,255,255,.1);border-radius:8px;padding:9px 13px}
.lead-consent{display:flex;gap:8px;align-items:center;font-size:12.5px;opacity:.85;flex-basis:100%}
.lead-sel{border:1px solid var(--board-line);background:rgba(255,255,255,.08);color:var(--board-ink);border-radius:8px;padding:9px 10px;width:auto}
.lead-sel option{color:#22322B}
.demo-note{width:100%;font-size:11.5px;opacity:.5;margin:0}
footer{max-width:1220px;margin:0 auto;padding:0 22px 30px;font-size:12.5px;color:var(--muted)}
footer a{color:var(--accent)}

@media print{
  header,.rail,.bar,.leadbar,footer,.tray,.warn,#vRooms,#vClasses,#vTools{display:none!important}
  body{background:#fff}.shell{padding:0;max-width:none}
  .cols{display:block}.stage-wrap{border:0;box-shadow:none}
  .card{box-shadow:none}
}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}