:root {
  --bg: #f3f1ed;
  --panel: #ffffff;
  --line: #e2ddd5;
  --line-2: #d3ccc1;
  --ink: #23201c;
  --ink-2: #5f584f;
  --ink-3: #8f877c;
  --acc: #b4532a;
  --acc-2: #d9773f;
  --acc-soft: #f6e6dc;
  --ok: #2f7d4f;
  --warn-bg: #fff4d6;
  --warn-ink: #7a5a00;
  --radius: 8px;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { font: 13px/1.4 var(--font); color: var(--ink); background: var(--bg); overflow: hidden; }
button, input, select { font: inherit; color: inherit; }
h2, h3 { margin: 0; }

/* ---------- верхняя панель ---------- */
.topbar {
  height: 52px; display: flex; align-items: center; gap: 16px; padding: 0 14px;
  background: #1f1c19; color: #f3efe9; border-bottom: 1px solid #000;
}
.brand { display: flex; align-items: baseline; gap: 8px; white-space: nowrap; }
.logo { font-weight: 800; letter-spacing: .08em; font-size: 17px; color: #fff; background: var(--acc); padding: 2px 7px; border-radius: 4px; }
.brand-sub { color: #c9c1b6; font-size: 12px; }
.proj { display: flex; gap: 8px; flex: 1; min-width: 0; }
.topbar .in { background: #2c2824; border: 1px solid #3d3832; color: #f3efe9; border-radius: 6px; padding: 6px 9px; min-width: 0; width: 200px; }
.topbar .in-name { width: 260px; font-weight: 600; }
.topbar .in:focus { outline: 2px solid var(--acc-2); outline-offset: -1px; }
.actions { display: flex; gap: 6px; align-items: center; }
.btn { border: 1px solid #45403a; background: #2c2824; color: #f3efe9; padding: 6px 12px; border-radius: 6px; cursor: pointer; white-space: nowrap; }
.btn:hover { background: #38332d; }
.btn-primary { background: var(--acc); border-color: var(--acc); color: #fff; font-weight: 600; }
.btn-primary:hover { background: var(--acc-2); }
.menu { position: relative; }
.menu-pop { position: absolute; right: 0; top: calc(100% + 6px); background: var(--panel); color: var(--ink); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 10px 30px rgba(0,0,0,.18); min-width: 260px; padding: 6px; z-index: 30; }
.menu-pop button { display: block; width: 100%; text-align: left; background: none; border: 0; padding: 8px 10px; border-radius: 5px; cursor: pointer; }
.menu-pop button:hover { background: var(--acc-soft); }
.menu-pop hr { border: 0; border-top: 1px solid var(--line); margin: 6px 0; }

/* ---------- раскладка ---------- */
.layout { display: grid; grid-template-columns: 330px 1fr 400px; height: calc(100% - 52px); }
.side, .spec { background: var(--panel); border-right: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; }
.spec { border-right: 0; border-left: 1px solid var(--line); }
.tabs { display: flex; border-bottom: 1px solid var(--line); padding: 0 8px; gap: 2px; flex: none; }
.tab { border: 0; background: none; padding: 11px 12px 9px; cursor: pointer; color: var(--ink-2); border-bottom: 2px solid transparent; font-weight: 600; }
.tab:hover { color: var(--ink); }
.tab.is-on { color: var(--acc); border-bottom-color: var(--acc); }
.tab-body { overflow: auto; padding: 12px 14px 24px; flex: 1; min-height: 0; }

/* ---------- формы ---------- */
.grp { margin-bottom: 16px; }
.grp-t { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); font-weight: 700; margin: 0 0 8px; }
.row { display: grid; grid-template-columns: 1fr 120px; gap: 8px; align-items: center; margin-bottom: 7px; }
.row.wide { grid-template-columns: 1fr; }
.row:has(> select) { grid-template-columns: 1fr 1.5fr; }
.card .row:has(> select) { grid-template-columns: 96px 1fr; }
.row > label { color: var(--ink-2); }
.f { width: 100%; border: 1px solid var(--line-2); border-radius: 6px; padding: 6px 8px; background: #fff; }
.f:focus { outline: 2px solid var(--acc-2); outline-offset: -1px; border-color: transparent; }
.num { position: relative; }
.num .f { padding-right: 32px; text-align: right; font-variant-numeric: tabular-nums; }
.num .u { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); color: var(--ink-3); font-size: 11px; pointer-events: none; }
.seg { display: flex; border: 1px solid var(--line-2); border-radius: 7px; overflow: hidden; }
.seg button { flex: 1; border: 0; background: #fff; padding: 7px 6px; cursor: pointer; color: var(--ink-2); font-weight: 600; }
.seg button + button { border-left: 1px solid var(--line-2); }
.seg button.is-on { background: var(--acc); color: #fff; }
.hint { color: var(--ink-3); font-size: 12px; margin: 4px 0 8px; }

/* секции */
.sec-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.stepper { display: inline-flex; align-items: center; border: 1px solid var(--line-2); border-radius: 7px; overflow: hidden; }
.stepper button { border: 0; background: #fff; width: 30px; height: 30px; cursor: pointer; font-size: 16px; }
.stepper button:hover { background: var(--acc-soft); }
.stepper span { min-width: 34px; text-align: center; font-weight: 700; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px 4px; margin-bottom: 10px; background: #fff; cursor: pointer; transition: border-color .12s, box-shadow .12s; }
.card:hover { border-color: var(--line-2); }
.card.is-sel { border-color: var(--acc); box-shadow: 0 0 0 3px var(--acc-soft); }
.card-t { display: flex; justify-content: space-between; align-items: baseline; font-weight: 700; margin-bottom: 8px; }
.card-t .muted { font-weight: 400; color: var(--ink-3); font-variant-numeric: tabular-nums; }

/* ---------- 3D ---------- */
.view { position: relative; min-width: 0; min-height: 0; }
.viewport { position: absolute; inset: 0; }
.viewport canvas { display: block; }
.labels-layer { position: absolute; inset: 0; pointer-events: none; }
.dim-label { background: rgba(255,255,255,.92); color: var(--acc); border: 1px solid #e7c3ad; font: 600 11px/1 var(--mono); padding: 3px 5px; border-radius: 4px; }
.dim-sec { color: var(--ink-2); border-color: var(--line-2); }
.dim-sec.is-sel { color: #fff; background: var(--acc); border-color: var(--acc); }
.view-tools { position: absolute; left: 12px; bottom: 12px; display: flex; gap: 6px; flex-wrap: wrap; align-items: center; background: rgba(255,255,255,.88); backdrop-filter: blur(6px); padding: 6px; border-radius: 10px; border: 1px solid var(--line); }
.chip { border: 1px solid var(--line-2); background: #fff; border-radius: 6px; padding: 5px 10px; cursor: pointer; color: var(--ink-2); font-weight: 600; }
.chip:hover { border-color: var(--acc-2); }
.chip.is-on { background: var(--ink); color: #fff; border-color: var(--ink); }
.sep { width: 1px; height: 20px; background: var(--line-2); margin: 0 2px; }
.warn { position: absolute; top: 12px; left: 12px; right: 12px; max-width: 640px; background: var(--warn-bg); color: var(--warn-ink); border: 1px solid #f0d58a; border-radius: var(--radius); padding: 8px 12px; font-size: 12px; box-shadow: 0 4px 14px rgba(0,0,0,.06); }
.warn ul { margin: 0; padding-left: 18px; }

/* ---------- спецификация ---------- */
.kpi { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 14px; }
.kpi div { border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 10px; }
.kpi b { display: block; font-size: 18px; font-variant-numeric: tabular-nums; }
.kpi span { color: var(--ink-3); font-size: 11px; }
.kpi .big { grid-column: span 2; background: var(--ink); color: #fff; border-color: var(--ink); }
.kpi .big span { color: #c9c1b6; }
.kpi .big b { font-size: 24px; }
table.t { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.t th { text-align: left; font-size: 11px; color: var(--ink-3); font-weight: 700; padding: 5px 4px; border-bottom: 1px solid var(--line-2); position: sticky; top: -12px; background: #fff; }
.t td { padding: 5px 4px; border-bottom: 1px solid var(--line); vertical-align: top; }
.t td.n, .t th.n { text-align: right; }
.t tr.mat-row td { background: #faf8f5; font-weight: 700; color: var(--ink-2); font-size: 12px; }
.e { font: 10px var(--mono); color: var(--ink-3); white-space: nowrap; }
.missing { background: var(--warn-bg); color: var(--warn-ink); border-radius: var(--radius); padding: 8px 10px; font-size: 12px; margin-top: 10px; }
.link { background: none; border: 0; color: var(--acc); cursor: pointer; padding: 0; text-decoration: underline; }

/* ---------- диалог ---------- */
.dlg { border: 0; border-radius: 12px; padding: 0; width: min(920px, 94vw); max-height: 88vh; box-shadow: 0 30px 80px rgba(0,0,0,.35); }
.dlg::backdrop { background: rgba(20,18,15,.45); }
.dlg-inner { display: flex; flex-direction: column; max-height: 88vh; }
.dlg-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.dlg-head h2 { font-size: 16px; }
.x { border: 0; background: none; font-size: 22px; cursor: pointer; color: var(--ink-3); }
.dlg-body { padding: 14px 18px 18px; overflow: auto; }
.dlg .t input { width: 100%; border: 1px solid var(--line-2); border-radius: 5px; padding: 4px 6px; text-align: right; }
.dlg .t input.tl { text-align: left; }
.dlg .t input[type=color] { padding: 0; width: 34px; height: 24px; }
.plist { list-style: none; margin: 0; padding: 0; }
.plist li { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 4px; border-bottom: 1px solid var(--line); }
.plist .meta { color: var(--ink-3); font-size: 12px; }
.plist .btns { display: flex; gap: 6px; }
.btn2 { border: 1px solid var(--line-2); background: #fff; border-radius: 6px; padding: 5px 10px; cursor: pointer; }
.btn2:hover { border-color: var(--acc); color: var(--acc); }
.btn2.danger:hover { border-color: #b3261e; color: #b3261e; }

.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 9px 16px; border-radius: 8px; z-index: 50; box-shadow: 0 8px 24px rgba(0,0,0,.25); }

/* ---------- печать ---------- */
.print-area { display: none; }
@media print {
  body { overflow: visible; background: #fff; }
  .topbar, .layout, .toast, dialog { display: none !important; }
  .print-area { display: block; padding: 0; font-size: 11px; }
  .print-area h1 { font-size: 18px; margin: 0 0 4px; }
  .print-area img { width: 100%; max-height: 330px; object-fit: contain; border: 1px solid #ddd; margin: 8px 0; }
  .print-area h3 { margin: 14px 0 6px; font-size: 13px; }
  .t th { position: static; }
  @page { size: A4; margin: 12mm; }
}

/* ---------- узкие экраны ---------- */
@media (max-width: 1200px) {
  .layout { grid-template-columns: 300px 1fr 340px; }
  .topbar .in { width: 150px; }
  .topbar .in-name { width: 180px; }
}
@media (max-width: 900px) {
  body { overflow: auto; }
  .topbar { height: auto; flex-wrap: wrap; padding: 8px 12px; }
  .proj { order: 3; flex-basis: 100%; }
  .topbar .in, .topbar .in-name { width: 100%; }
  .layout { display: flex; flex-direction: column; height: auto; }
  .view { height: 60vh; order: -1; }
  .side, .spec { border: 0; border-top: 1px solid var(--line); }
}