:root{
  --bg:#F5F6F3; --paper:#FFFFFF; --ink:#1C2430; --ink-2:#4A5568; --ink-3:#7B8794;
  --line:#DDE2E0; --line-2:#C8CFCB;
  --accent:#1F4E79; --accent-soft:#E3ECF5; --brick:#B9572F; --brick-soft:#F6E6DF;
  --good:#2E7D5B; --good-soft:#E1F1E9; --warn:#B7791F; --warn-soft:#FBF0DA; --bad:#B03A2E; --bad-soft:#F8E1DE;
  --r-khach:#E8EEF5; --r-bep:#F7EBDD; --r-ngu:#EEF3E6; --r-wc:#DDEFF0; --r-thang:#E9E6EF; --r-san:#DCEBD5; --r-tho:#F6E7C9; --r-lam:#F0EBE2;
  --shadow:0 1px 2px rgba(28,36,48,.06),0 8px 24px -12px rgba(28,36,48,.18);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#151A21; --paper:#1E2530; --ink:#EDF0F3; --ink-2:#B8C1CC; --ink-3:#8593A2;
    --line:#2C3542; --line-2:#3B4655;
    --accent:#7FB0E0; --accent-soft:#22334A; --brick:#E28A63; --brick-soft:#3F2A20;
    --good:#6FC79E; --good-soft:#1F3A2E; --warn:#E0B060; --warn-soft:#3D3320; --bad:#E58275; --bad-soft:#3F2422;
    --r-khach:#2A3646; --r-bep:#3F3428; --r-ngu:#2F3A2A; --r-wc:#26393B; --r-thang:#34303F; --r-san:#28382A; --r-tho:#41372A; --r-lam:#36322B;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px -12px rgba(0,0,0,.6);
  }
}
:root[data-theme="dark"]{
  --bg:#151A21; --paper:#1E2530; --ink:#EDF0F3; --ink-2:#B8C1CC; --ink-3:#8593A2;
  --line:#2C3542; --line-2:#3B4655;
  --accent:#7FB0E0; --accent-soft:#22334A; --brick:#E28A63; --brick-soft:#3F2A20;
  --good:#6FC79E; --good-soft:#1F3A2E; --warn:#E0B060; --warn-soft:#3D3320; --bad:#E58275; --bad-soft:#3F2422;
  --r-khach:#2A3646; --r-bep:#3F3428; --r-ngu:#2F3A2A; --r-wc:#26393B; --r-thang:#34303F; --r-san:#28382A; --r-tho:#41372A; --r-lam:#36322B;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px -12px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;font-size:15px;line-height:1.5;margin:0}
.wrap{max-width:960px;margin:0 auto;padding-inline:16px;padding-block:0 48px}
header.top{padding-block:18px 10px;display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}
.brand{font-family:"Lora",Georgia,serif;font-weight:600;font-size:22px;letter-spacing:-.01em}
.brand small{font-family:"Be Vietnam Pro",sans-serif;font-weight:500;font-size:12px;color:var(--ink-3);margin-left:8px;letter-spacing:.06em;text-transform:uppercase}
.tag{font-size:12px;color:var(--ink-3)}
nav.steps{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--bg);padding-block:8px;display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;border-bottom:1px solid var(--line)}
nav.steps::-webkit-scrollbar{display:none}
nav.steps button{flex:0 0 auto;border:1px solid var(--line);background:var(--paper);color:var(--ink-2);border-radius:999px;padding:7px 13px;font:inherit;font-size:13px;font-weight:500;cursor:pointer;display:flex;gap:7px;align-items:center;white-space:nowrap}
nav.steps button .n{width:20px;height:20px;border-radius:50%;background:var(--line);color:var(--ink-2);font-size:11px;display:grid;place-items:center;font-weight:600}
nav.steps button.active{background:var(--accent);border-color:var(--accent);color:#fff}
nav.steps button.active .n{background:rgba(255,255,255,.25);color:#fff}
nav.steps button:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--brick);outline-offset:2px}
section.step{display:none;padding-top:18px}
section.step.active{display:block}
h2{font-family:"Lora",Georgia,serif;font-weight:600;font-size:22px;margin:0 0 4px;text-wrap:balance}
.lead{color:var(--ink-2);margin:0 0 18px;max-width:62ch}
.card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:16px}
.grid{display:grid;gap:14px}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.field{display:flex;flex-direction:column;gap:5px}
.field label{font-size:12px;font-weight:600;color:var(--ink-2);letter-spacing:.04em;text-transform:uppercase}
.field input,.field select{font:inherit;padding:9px 11px;border:1px solid var(--line-2);border-radius:8px;background:var(--bg);color:var(--ink);width:100%}
.field .hint{font-size:12px;color:var(--ink-3)}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--line-2);background:var(--bg);color:var(--ink-2);border-radius:999px;padding:6px 12px;font:inherit;font-size:13px;cursor:pointer}
.chip.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:600}
.btn{font:inherit;font-weight:600;border-radius:9px;padding:10px 16px;border:1px solid var(--accent);background:var(--accent);color:#fff;cursor:pointer}
.btn.ghost{background:transparent;color:var(--accent)}
.btn.brick{background:var(--brick);border-color:var(--brick);color:#fff}
.btn:disabled{opacity:.5;cursor:not-allowed}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;justify-content:space-between}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-bottom:16px}
.kpi{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.kpi .l{font-size:11px;color:var(--ink-3);text-transform:uppercase;letter-spacing:.06em;font-weight:600}
.kpi .v{font-size:22px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.01em;margin-top:2px}
.kpi .s{font-size:12px;color:var(--ink-2)}
.note{border-left:3px solid var(--accent);background:var(--accent-soft);padding:10px 12px;border-radius:0 8px 8px 0;font-size:14px;margin:12px 0}
.note.warn{border-color:var(--warn);background:var(--warn-soft)}
.note.good{border-color:var(--good);background:var(--good-soft)}
.note.bad{border-color:var(--bad);background:var(--bad-soft)}
.floorcard{margin-bottom:14px}
.floorcard h3{margin:0 0 8px;font-size:15px;font-weight:600;display:flex;justify-content:space-between;align-items:baseline}
.floorcard h3 span{font-size:12px;color:var(--ink-3);font-weight:500}
canvas.plan{width:100%;display:block;border-radius:8px;background:var(--bg)}
.lint{list-style:none;padding:0;margin:8px 0 0;display:flex;flex-direction:column;gap:6px}
.lint li{font-size:13px;padding:6px 10px;border-radius:6px;background:var(--good-soft);color:var(--ink)}
.lint li.w{background:var(--warn-soft)}
.lint li.b{background:var(--bad-soft)}
#view3d{width:100%;aspect-ratio:4/3;max-width:100%;border-radius:10px;overflow:hidden;background:#E9EEF2;touch-action:none;position:relative}
:root[data-theme="dark"] #view3d{background:#10141A}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) #view3d{background:#10141A}}
#view3d canvas{display:block;width:100%;height:100%}
.legend{display:flex;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--ink-2);margin-top:8px}
.legend span{display:inline-flex;align-items:center;gap:5px}
.legend i{width:12px;height:12px;border-radius:3px;border:1px solid var(--line-2);display:inline-block}
.levels{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:14px}
.level{border:1px solid var(--line);background:var(--paper);border-radius:10px;padding:12px;cursor:pointer;text-align:left;font:inherit;color:var(--ink)}
.level.on{border-color:var(--brick);box-shadow:0 0 0 2px var(--brick-soft)}
.level b{display:block;font-size:15px}
.level small{color:var(--ink-3);font-size:12px}
.level .p{font-weight:600;color:var(--brick);font-size:13px;margin-top:6px;font-variant-numeric:tabular-nums}
.roomlist{display:flex;flex-direction:column;gap:8px}
.room{display:grid;grid-template-columns:1fr auto;gap:8px 12px;align-items:center;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--paper)}
.room .nm{font-weight:600}
.room .nm small{font-weight:400;color:var(--ink-3);margin-left:6px}
.room select{font:inherit;font-size:13px;padding:6px 8px;border-radius:7px;border:1px solid var(--line-2);background:var(--bg);color:var(--ink)}
.room .mats{grid-column:1/-1;display:flex;gap:8px;flex-wrap:wrap}
.mat{display:flex;gap:8px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:6px 8px;font-size:12px;background:var(--bg);max-width:100%}
.mat i{width:22px;height:22px;border-radius:5px;flex:0 0 auto;border:1px solid rgba(0,0,0,.08)}
.mat b{display:block;font-weight:600;font-size:12px}
.mat span{color:var(--ink-3)}
.mat a{color:var(--accent);text-decoration:none;font-weight:600;white-space:nowrap}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:8px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-3);font-weight:600}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
tr.sum td{font-weight:700;border-top:2px solid var(--line-2)}
.tablewrap{overflow-x:auto}
.bar{height:10px;background:var(--line);border-radius:999px;overflow:hidden;display:flex;margin:8px 0}
.bar i{display:block;height:100%}
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
details{border:1px solid var(--line);border-radius:10px;background:var(--paper);padding:10px 14px;margin-top:10px}
summary{cursor:pointer;font-weight:600}
.muted{color:var(--ink-3);font-size:12px}
.ctl{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.fs{margin-top:14px}
.fs h3{margin:0 0 6px;font-size:15px}
.proto{font-size:12px;color:var(--ink-3);border:1px dashed var(--line-2);border-radius:8px;padding:8px 10px;margin-top:14px}
@media (prefers-reduced-motion:no-preference){section.step.active{animation:fade .25s ease}}
@keyframes fade{from{opacity:.4;transform:translateY(4px)}to{opacity:1;transform:none}}

html,body{height:100%}
.gap14{gap:14px}.f1{flex:1}.mt8{margin-top:8px}.mt12{margin-top:12px}.mt14{margin-top:14px}
.pname{font:inherit;font-weight:600;border:1px solid var(--line);border-radius:999px;padding:6px 12px;background:var(--paper);color:var(--ink);max-width:220px}
select.chip{appearance:auto}
.empty3d{padding:24px;color:var(--ink-3)}
.foot{font-size:12px;color:var(--ink-3);margin-top:32px;border-top:1px solid var(--line);padding-top:12px}
.foot code{font-size:11px;background:var(--accent-soft);padding:1px 5px;border-radius:4px}
.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:999px;font-size:13px;z-index:20;box-shadow:var(--shadow)}
@media print{
  nav.steps,.actions,header.top .row,#projectbar,.ctl,.foot,.toast,.btn,.levels,.room select{display:none!important}
  body{background:#fff;color:#000}.wrap{max-width:none;padding:0}
  section.step{display:none}section.step.print{display:block!important}
  .card,.kpi,.room{border-color:#999;box-shadow:none;break-inside:avoid}
  canvas.plan{background:#fff}
}

.mb14{margin-bottom:14px}
details.card summary{font-weight:600}
.editrow{display:grid;grid-template-columns:1fr 110px;gap:8px;align-items:center;padding:6px 0;border-bottom:1px solid var(--line);font-size:14px}
.editrow small{color:var(--ink-3);margin-left:6px}
.editrow input{font:inherit;padding:6px 8px;border:1px solid var(--line-2);border-radius:7px;background:var(--bg);color:var(--ink);width:100%}
.editfloor{font-weight:600;margin-top:10px;font-size:13px;color:var(--ink-2);text-transform:uppercase;letter-spacing:.04em}
.sheetnav{display:flex;gap:6px;flex-wrap:wrap;margin-top:14px}
.sheetnav button{font:inherit;font-size:12px;border:1px solid var(--line);background:var(--paper);color:var(--ink-2);border-radius:7px;padding:5px 9px;cursor:pointer}
.sheetnav button.on{background:var(--accent);border-color:var(--accent);color:#fff}
.sheetview{margin-top:12px;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}
.sheetview svg{display:block;width:100%;height:auto}
.sheetsprint{display:none}
@media print{
  section.step.print#s5 .card,section.step.print#s5 .lead,section.step.print#s5 h2,section.step.print#s5 .note,section.step.print#s5 .sheetnav,section.step.print#s5 .sheetview,section.step.print#s5 .row{display:none!important}
  .sheetsprint{display:block}
  .sheetsprint svg{width:420mm;height:297mm;display:block;page-break-after:always}
  @page{margin:0}
  body.print-sheets{margin:0}
}

.aigallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin-top:12px}
.aigallery figure{margin:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--paper)}
.aigallery img{display:block;width:100%;height:auto}
.aigallery figcaption{font-size:12px;color:var(--ink-3);padding:6px 8px;display:flex;justify-content:space-between;gap:6px;align-items:center}
.aigallery a{color:var(--accent);font-weight:600;text-decoration:none;white-space:nowrap}
.aigallery .guide{opacity:.85}
#aiPanel code{font-size:12px;background:var(--accent-soft);padding:1px 5px;border-radius:4px}