:root{
  --ink:#111827;
  --line:#232a36;
  --bar:#8b9099;
  --bar-ink:#ffffff;
  --head:#e5e7eb;
  --input:#fff8dc;
  --accent:#0f766e;
  --accent-2:#0d9488;
  --muted:#64748b;
  --bg:#eef1f4;
  --radius:8px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Segoe UI",Calibri,system-ui,-apple-system,Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
}

/* ---------- top bar ---------- */
.appbar{
  height:56px;display:flex;align-items:center;gap:12px;padding:0 14px;
  background:#0b1220;color:#fff;position:sticky;top:0;z-index:40;
}
.brand{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:600;white-space:nowrap}
.logo{background:var(--accent);border-radius:6px;padding:4px 7px;font-size:12px;font-weight:800;letter-spacing:.5px}
.muted{color:#9aa4b2;font-weight:400}
.app-actions{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.btn{
  border:1px solid #334155;background:#111a2b;color:#e5e7eb;padding:7px 11px;border-radius:7px;
  font:inherit;font-size:13px;cursor:pointer;line-height:1.1;white-space:nowrap;
}
.btn:hover{background:#1b2740}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
.btn.primary:hover{background:var(--accent-2)}
.btn.ghost{background:transparent}
.btn.small{font-size:12px;padding:5px 9px}
.icon-btn{display:none;background:transparent;border:0;color:#fff;font-size:19px;cursor:pointer;padding:4px 6px}

/* ---------- layout ---------- */
.layout{display:flex;align-items:flex-start;min-height:calc(100vh - 56px)}
.sidebar{
  width:282px;flex:0 0 282px;background:#fff;border-right:1px solid #d7dce2;
  padding:14px;max-height:calc(100vh - 56px);position:sticky;top:56px;overflow-y:auto;
}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.sidebar-head h2{font-size:12px;letter-spacing:.9px;text-transform:uppercase;color:#475569;margin:0}
.count{background:#e2e8f0;color:#334155;border-radius:20px;font-size:11px;padding:2px 8px;font-weight:700}
.search{
  width:100%;padding:8px 10px;border:1px solid #cbd5e1;border-radius:8px;font:inherit;font-size:13px;
  outline:none;background:#f8fafc;
}
.search:focus{border-color:var(--accent);background:#fff}
.project-list{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.project-item{
  display:flex;align-items:center;gap:6px;padding:8px 10px;border:1px solid #e2e8f0;border-radius:8px;
  cursor:pointer;background:#fff;transition:border-color .12s,background .12s;
}
.project-item:hover{border-color:#94a3b8}
.project-item.active{border-color:var(--accent);background:#f0fdfa}
.p-main{flex:1;min-width:0}
.p-name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.p-sub{font-size:11px;color:var(--muted);display:flex;gap:6px;margin-top:1px}
.p-del{
  border:0;background:transparent;color:#94a3b8;cursor:pointer;font-size:16px;line-height:1;
  padding:3px 6px;border-radius:5px;flex:0 0 auto;
}
.p-del:hover{color:#dc2626;background:#fee2e2}
.empty{color:#94a3b8;font-size:12px;text-align:center;padding:22px 0}
.hint{font-size:11px;color:#94a3b8;line-height:1.45;margin:14px 0 0}

.sync-box{margin-top:14px;border-top:1px solid #e2e8f0;padding-top:12px;display:flex;flex-direction:column;gap:8px}
.sync-title{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:700;letter-spacing:.3px;color:#475569;text-transform:uppercase}
.dot{width:8px;height:8px;border-radius:50%;background:#cbd5e1;display:inline-block;flex:0 0 auto}
.dot.on{background:#10b981;box-shadow:0 0 0 3px rgba(16,185,129,.15)}
.dot.err{background:#ef4444}
.sync-box .search{padding:7px 9px;font-size:12px}
.sync-actions{display:flex;gap:6px;flex-wrap:wrap}
.sync-actions .btn{flex:1;text-align:center;padding:6px 7px;min-width:0}
.sync-box .btn{border-color:#cbd5e1;background:#fff;color:#334155}
.sync-box .btn:hover{background:#f1f5f9}
.sync-box .btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.sync-box .btn.primary:hover{background:var(--accent-2)}
.sync-status{font-size:11px;color:#64748b;line-height:1.4}
.sync-status.error{color:#dc2626}
.sync-box .hint{margin:2px 0 0}

.canvas{flex:1;min-width:0;padding:26px;display:flex;justify-content:center;align-items:flex-start}

/* ---------- sheet ---------- */
.sheet{
  width:210mm;max-width:100%;background:#fff;padding:10mm;
  box-shadow:0 10px 34px rgba(15,23,42,.13);
  font-size:12.5px;color:var(--ink);
}

.doc-title-row{display:flex;align-items:stretch;border:1.5px solid var(--line);margin-top:0}
.doc-title-row h1{
  flex:1;margin:0;text-align:center;font-size:26px;letter-spacing:.6px;
  padding:10px 8px;display:flex;align-items:center;justify-content:center;font-weight:800;
}
.date-field{width:38mm;flex:0 0 38mm;border-left:1px solid var(--line);display:flex;flex-direction:column}
.date-field label{font-size:11px;padding:2px 7px;border-bottom:1px solid #d1d5db;color:#374151}
.date-field input{border:0;padding:5px 7px;font:inherit;font-size:12px;background:var(--input);width:100%}

.bar{
  border:1px solid var(--line);border-top:0;background:var(--bar);color:var(--bar-ink);
  font-size:11.5px;font-weight:700;letter-spacing:.65px;text-align:center;padding:4px 6px;
}
.bar-row{display:flex;border:1px solid var(--line);border-top:0}
.bar-row .bar{flex:1;border:0;border-right:1px solid var(--line)}
.bar-row .bar:last-child{border-right:0}

.details{border:1px solid var(--line);border-top:0}
.drow{display:grid;grid-template-columns:34mm 1fr;border-top:1px solid var(--line)}
.drow:first-child{border-top:0}
.drow.cols4{grid-template-columns:34mm 1fr 30mm 1fr}
.dlabel{
  padding:6px 8px;font-weight:600;font-size:12.5px;border-right:1px solid var(--line);
  display:flex;align-items:center;background:#fff;
}
.dvalue{min-width:0}
.cell-input{
  width:100%;border:0;background:var(--input);padding:6px 8px;font:inherit;font-size:12.5px;
  color:var(--ink);outline:none;
}
.cell-input:focus{background:#fff;outline:2px solid rgba(15,118,110,.28);outline-offset:-2px}
.cell-input.bold{font-weight:600}
.magenta{color:#c026d3}
.location{color:#c026d3;font-weight:700}

.scope-row{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-top:0}
.scope-cell{border-right:1px solid var(--line);min-width:0}
.scope-cell:last-child{border-right:0}
.scope-cell textarea{
  display:block;width:100%;min-height:150px;border:0;background:var(--input);
  padding:8px;font:inherit;font-size:12.5px;line-height:1.45;resize:vertical;outline:none;
}
.scope-cell textarea:focus{background:#fff}

/* ---------- tables ---------- */
.tables{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-top:0}
.tbl{border-collapse:collapse;width:100%;table-layout:fixed}
.tbl th,.tbl td{border:1px solid #3a4150;padding:4px 5px;font-size:12px;vertical-align:middle}
.tbl thead th{
  background:var(--head);font-size:10.5px;letter-spacing:.35px;text-transform:uppercase;
  font-weight:700;text-align:center;padding:5px 4px;
}
.tbl tbody td{background:#fff}
.tbl tfoot td{font-weight:700}
.manpower th:nth-child(1){width:28%}
.manpower th:nth-child(2){width:15%}
.manpower th:nth-child(3){width:16%}
.materials th:nth-child(1){width:12%}
.materials th:nth-child(2){width:46%}
.materials th:nth-child(3){width:14%}
.tbl th.row-tools,.tbl td.row-tools{width:22px;border-left:0;padding:0}
.tbl td.num,.tbl th.num{text-align:right}
.total-label{text-align:center}
.tbl tbody input{
  width:100%;border:0;background:transparent;padding:2px;font:inherit;font-size:12px;
  text-align:center;outline:none;min-width:0;
}
.tbl tbody input:focus{background:#fff8dc;box-shadow:inset 0 0 0 1px var(--accent)}
.tbl tbody tr:hover td{background:#fbfcfd}
.row-del{
  border:0;background:transparent;color:#b0b7c3;cursor:pointer;font-size:15px;line-height:1;
  width:100%;height:100%;padding:2px;
}
.row-del:hover{color:#dc2626;background:#fee2e2}
.add-row{display:flex;justify-content:flex-end;gap:8px;margin-top:9px}
.add-row .btn{border-color:#cbd5e1;background:#fff;color:#334155}
.add-row .btn:hover{background:#f1f5f9}

.note-row{border:1px solid var(--line);border-top:0}
.note{color:#e11d48;font-weight:700}

.sign-row{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-top:0}
.sign{border-right:1px solid var(--line);padding:20px 12px 6px}
.sign:last-child{border-right:0}
.sign input{
  display:block;width:82%;margin:0 auto 4px;border:0;border-bottom:1px solid #334155;background:var(--input);
  text-align:center;font:inherit;font-size:12.5px;padding:3px 4px;outline:none;
}
.sign span{display:block;text-align:center;font-size:11.5px;color:#374151}

.doc-foot{display:flex;justify-content:space-between;margin-top:8px;font-size:10.5px;color:#94a3b8}
.doc-foot #savedState{color:#0f766e}

.backdrop{display:none}

/* ---------- responsive ---------- */
@media screen and (max-width:900px){
  .icon-btn{display:block}
  .app-actions .btn{padding:6px 8px;font-size:12px}
  .brand .muted{display:none}
  .sidebar{
    position:fixed;left:0;top:56px;bottom:0;z-index:35;max-height:none;
    transform:translateX(-100%);transition:transform .2s ease;box-shadow:6px 0 24px rgba(0,0,0,.12);
  }
  .sidebar.open{transform:none}
  .backdrop.show{display:block;position:fixed;inset:56px 0 0;background:rgba(15,23,42,.35);z-index:30}
  .canvas{padding:12px}
  .sheet{padding:14px}
}

@media screen and (max-width:640px){
  .doc-title-row h1{font-size:20px}
  .tables{grid-template-columns:1fr}
  .tables .tbl:first-child{border-bottom:1px solid var(--line)}
  .scope-row{grid-template-columns:1fr}
  .scope-cell{border-right:0;border-bottom:1px solid var(--line)}
  .drow.cols4{grid-template-columns:34mm 1fr}
  .drow.cols4 .dlabel:nth-child(3){border-left:0;border-top:1px solid var(--line)}
  .drow.cols4 .dvalue:nth-child(4){border-top:1px solid var(--line)}
  .app-actions .btn.ghost{display:none}
}

/* ---------- print ---------- */
@media print{
  @page{size:A4 portrait;margin:6mm}
  body{background:#fff}
  .no-print,.appbar,.sidebar,.add-row,.doc-foot,.backdrop{display:none !important}
  .layout{display:block}
  .canvas{padding:0;display:block;overflow:visible}
  .sheet{
    width:auto;max-width:none;min-height:0;box-shadow:none;padding:0;border:0;
    font-size:10.5pt;
  }
  .doc-title-row{border:1.5pt solid #000}
  .doc-title-row h1{font-size:20pt}
  .bar{font-size:9pt;background:#8b9099 !important;color:#fff !important}
  .doc-title-row,.bar,.details,.bar-row,.scope-row,.tables,.note-row,.sign-row{border-color:#000}
  .drow,.dlabel,.scope-cell,.sign{border-color:#000}
  .tbl th,.tbl td{border-color:#000;font-size:9pt;padding:3px 4px}
  .tbl thead th{background:#e5e7eb !important;font-size:8pt}
  .cell-input,textarea,.sign input{background:#fff !important;color:#000 !important}
  textarea{resize:none;overflow:hidden}
  .row-tools,.row-del{display:none !important}
  .tbl th.row-tools,.tbl td.row-tools{display:none !important}
  .note{color:#c00 !important}
  .doc-foot{display:none !important}
  *{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}