:root{
  --bg:#f4f6f9; --panel:#fff; --line:#dde3ea; --line2:#eef1f5; --text:#1f2937; --muted:#6b7280;
  --accent:#1d4ed8; --accent2:#dbeafe; --danger:#dc2626; --ok:#059669; --warn:#d97706;
  --head:#0f172a; --mono:ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{height:100%}body{margin:0;height:100%;display:flex;flex-direction:column;overflow:hidden;background:var(--bg);color:var(--text);font:13px/1.45 -apple-system,"Pretendard","Apple SD Gothic Neo","Noto Sans KR",system-ui,sans-serif}
button,input,select,textarea{font:inherit;color:inherit}
#topbar{flex:none;min-height:52px;flex-wrap:wrap;padding:6px 14px;background:var(--head);color:#fff;display:flex;align-items:center;gap:14px;padding:0 14px;position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:8px}
.brand .logo{background:var(--accent);border-radius:6px;width:30px;height:30px;display:grid;place-items:center;font-weight:800;font-size:12px}
.brand b{display:block;line-height:1.1}.brand small{color:#94a3b8;font-size:11px}
.proj-name{background:#1e293b;border:1px solid #334155;color:#fff;border-radius:6px;padding:6px 10px;min-width:260px}
.spacer{flex:1}
.toolbar{display:flex;gap:6px;flex-wrap:wrap}
#layout{position:relative;flex:1;min-height:0;display:grid;grid-template-columns:270px 1fr}
#tree{background:var(--panel);border-right:1px solid var(--line);overflow:auto;padding:8px}
#content{overflow:auto;padding:14px 18px 60px}
#status{flex:none;height:26px;overflow-x:auto;white-space:nowrap;background:#e2e8f0;border-top:1px solid var(--line);font-size:12px;color:#334155;display:flex;align-items:center;gap:18px;padding:0 14px}
.btn{background:#fff;border:1px solid var(--line);border-radius:6px;padding:5px 10px;cursor:pointer;white-space:nowrap;font-size:12.5px}
.btn:hover{background:#f1f5f9}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover{background:#1e40af}
.btn.danger{color:var(--danger);border-color:#fca5a5}.btn.danger:hover{background:#fef2f2}
.btn.sm{padding:2px 7px;font-size:11.5px}
.btn.ghost{border-color:transparent;background:transparent}.btn.ghost:hover{background:#f1f5f9}
#topbar .btn{background:#1e293b;border-color:#334155;color:#e2e8f0}#topbar .btn:hover{background:#334155}
#topbar .btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
/* tree */
.tree-head{display:flex;justify-content:space-between;align-items:center;font-weight:700;padding:4px 6px 8px;color:var(--muted);font-size:12px}
.node{display:flex;align-items:center;gap:6px;padding:4px 6px;border-radius:6px;cursor:pointer;user-select:none}
.node:hover{background:#f1f5f9}.node.sel{background:var(--accent2);color:#1e3a8a;font-weight:600}
.node.b{font-weight:700;margin-top:6px}.node.f{padding-left:18px}.node.r{padding-left:34px;font-weight:400}
.node .ic{width:16px;text-align:center;color:var(--muted);font-size:11px}
.node .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.node .mult{color:var(--muted);font-size:11px}
.node .add{opacity:0;border:none;background:transparent;cursor:pointer;color:var(--accent);font-weight:700;padding:0 4px}
.node:hover .add{opacity:1}
/* tabs */
.tabs{display:flex;gap:2px;border-bottom:2px solid var(--line);margin-bottom:14px;flex-wrap:wrap}
.tabs button{border:none;background:transparent;padding:8px 12px;cursor:pointer;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-2px;font-weight:600}
.tabs button.on{color:var(--accent);border-color:var(--accent)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-bottom:14px}
.card h3{margin:0 0 10px;font-size:14px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;white-space:nowrap}
.card h3 .r{margin-left:auto;display:flex;gap:6px;font-weight:400}
.grid{display:grid;gap:10px 16px}.g2{grid-template-columns:1fr 1fr}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.g6{grid-template-columns:repeat(6,1fr)}
.field label{display:block;font-size:11.5px;color:var(--muted);margin-bottom:3px}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);border-radius:6px;padding:6px 8px;background:#fff}
.field input:focus,.field select:focus,.tbl input:focus,.tbl select:focus{outline:2px solid #bfdbfe;border-color:var(--accent)}
.muted{color:var(--muted)}.mono{font-family:var(--mono)}.right{text-align:right}.center{text-align:center}
.tbl{width:100%;border-collapse:collapse;font-size:12.5px}
.tbl th,.tbl td{border-bottom:1px solid var(--line2);padding:4px 6px;text-align:left;vertical-align:middle}
.tbl th{background:#f8fafc;font-weight:600;color:#475569;font-size:11.5px;white-space:nowrap;border-bottom:1px solid var(--line)}
.tbl td.num,.tbl th.num{text-align:right;font-variant-numeric:tabular-nums}
.tbl input,.tbl select{width:100%;border:1px solid transparent;background:transparent;border-radius:4px;padding:3px 5px}
.tbl input:hover,.tbl select:hover{border-color:var(--line);background:#fff}
.tbl input[type=number]{text-align:right}
.tbl tr.total td{font-weight:700;background:#f8fafc;border-top:1px solid var(--line)}
.tbl tr.grp td{background:#eef2ff;font-weight:700;color:#3730a3}
.tbl .err{color:var(--danger);font-size:11px}
.kpis{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.kpi{background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:8px 12px;min-width:110px}
.kpi small{display:block;color:var(--muted);font-size:11px}.kpi b{font-size:15px;font-variant-numeric:tabular-nums}
.badge{display:inline-block;background:#e2e8f0;border-radius:999px;padding:1px 8px;font-size:11px;color:#334155}
.badge.blue{background:var(--accent2);color:#1e3a8a}.badge.green{background:#d1fae5;color:#065f46}.badge.amber{background:#fef3c7;color:#92400e}
.plan-wrap{display:grid;grid-template-columns:1fr 300px;gap:14px}
.plan{border:1px solid var(--line);border-radius:8px;background:#fafcff;position:relative;overflow:hidden}
.plan svg{width:100%;height:380px;display:block;touch-action:none}
.plan .hint{position:absolute;left:8px;bottom:6px;font-size:11px;color:var(--muted);background:rgba(255,255,255,.85);padding:2px 6px;border-radius:4px}
.plan.draw{cursor:crosshair;outline:2px solid #93c5fd}
.edge{stroke:#1f2937;stroke-width:2.5;cursor:pointer}.edge:hover{stroke:var(--accent);stroke-width:4}
.edge.skip{stroke:#f59e0b;stroke-dasharray:6 5}
.edge.selEdge{stroke:var(--accent);stroke-width:4}
.vtx{fill:#fff;stroke:var(--accent);stroke-width:2;cursor:move}.vtx:hover{fill:var(--accent2)}
.dim{font-size:10px;fill:#475569;font-family:var(--mono);pointer-events:none}
.room-fill{fill:#dbeafe;fill-opacity:.55;stroke:none}
.helper{font-size:11.5px;color:var(--muted);margin-top:6px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line);border-radius:999px;padding:2px 9px;font-size:11.5px;cursor:pointer;background:#fff}
.chip.on{background:var(--accent2);border-color:#93c5fd;color:#1e3a8a}
dialog{border:none;border-radius:12px;padding:0;max-width:720px;width:92vw;box-shadow:0 20px 60px rgba(0,0,0,.25)}
dialog::backdrop{background:rgba(15,23,42,.45)}
.modal-h{padding:14px 18px;border-bottom:1px solid var(--line);font-weight:700;display:flex;align-items:center}
.modal-b{padding:14px 18px;max-height:60vh;overflow:auto}
.modal-f{padding:12px 18px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:8px}
.list-check label{display:flex;gap:8px;align-items:center;padding:4px 2px}
.sheet h2{font-size:16px;margin:0 0 6px}.sheet h4{margin:14px 0 6px;font-size:13px;color:#1e3a8a}
.sheet .roomhead{background:#f1f5f9;padding:6px 10px;border-radius:6px;margin:12px 0 4px;display:flex;gap:14px;font-size:12px}
.room-summary{display:flex;gap:16px;flex-wrap:wrap;font-size:12px;color:#334155}
.room-summary b{font-variant-numeric:tabular-nums}
.warnbox{background:#fffbeb;border:1px solid #fde68a;color:#92400e;border-radius:8px;padding:8px 12px;font-size:12px;margin-bottom:10px}
.help p{margin:6px 0}.help code{background:#f1f5f9;padding:1px 5px;border-radius:4px;font-family:var(--mono);font-size:12px}
.help h4{margin:14px 0 4px}
kbd{border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:0 5px;font-size:11px;background:#fff}
@media (max-width:900px){#layout{grid-template-columns:1fr}#tree{display:none}#topbar{gap:8px}.brand small{display:none}.proj-name{min-width:0;flex:1}.toolbar{flex-basis:100%;flex-wrap:nowrap;overflow-x:auto;padding-bottom:2px}#topbar .spacer{display:none}#content{padding:10px 12px 60px}.plan-wrap{grid-template-columns:1fr}.grid.g4,.grid.g6{grid-template-columns:1fr 1fr}}
.tree-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:6px;padding:4px 9px;margin:4px 6px 4px 0;cursor:pointer}
@media (max-width:900px){.tree-toggle{display:inline-block}body.tree-open #tree{display:block;position:absolute;top:0;left:0;bottom:0;width:270px;z-index:15;box-shadow:4px 0 16px rgba(0,0,0,.15)}}
@page{size:A4;margin:12mm}
@media print{
  #topbar,#tree,#status,.no-print,.tabs{display:none!important}
  #layout{display:block;height:auto}#content{padding:0;overflow:visible}
  body{background:#fff;font-size:11px}.card{border:none;padding:0;margin-bottom:10px;break-inside:avoid}
  .tbl th,.tbl td{padding:2px 4px}
}
.tbl td.mono{font-size:12px}
.tbl select{max-width:100%}