:root {
  --bg: #f4f5f3; --panel: #ffffff; --ink: #1b1f22; --muted: #6b7378; --line: #e3e6e4;
  --accent: #1f6f5c; --accent-ink: #ffffff; --accent-soft: #e5f1ed; --warn: #a15c07; --warn-bg: #fff4e3;
  --metal: #c3c7ca; --glass: #bfe3d6; --chip: #f1f3f2; --shadow: 0 1px 2px rgba(0,0,0,.05), 0 6px 24px rgba(0,0,0,.06);
  --viewer-a: #e9eef0; --viewer-b: #f7f7f4;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121516; --panel: #1a1e20; --ink: #e8ecec; --muted: #9aa3a6; --line: #2b3133;
    --accent: #4fb397; --accent-ink: #0d1412; --accent-soft: #1f2f2a; --warn: #f0b35a; --warn-bg: #2d2416;
    --metal: #7d8487; --glass: #4d7b6d; --chip: #23292b; --viewer-a: #1d2427; --viewer-b: #14181a;
  }
}
:root[data-theme="dark"] {
  --bg: #121516; --panel: #1a1e20; --ink: #e8ecec; --muted: #9aa3a6; --line: #2b3133;
  --accent: #4fb397; --accent-ink: #0d1412; --accent-soft: #1f2f2a; --warn: #f0b35a; --warn-bg: #2d2416;
  --metal: #7d8487; --glass: #4d7b6d; --chip: #23292b; --viewer-a: #1d2427; --viewer-b: #14181a;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--ink); font: 14px/1.45 Inter, system-ui, sans-serif; }
header { height: 56px; display: flex; align-items: center; gap: 12px; padding: 0 20px; background: var(--panel); border-bottom: 1px solid var(--line); }
header .logo { font-weight: 700; letter-spacing: -.01em; font-size: 16px; }
header .logo span { color: var(--accent); }
header .sub { color: var(--muted); font-size: 13px; }
main { display: grid; grid-template-columns: 1fr 420px; height: calc(100% - 56px); }
#viewer { position: relative; overflow: hidden; background: linear-gradient(180deg, var(--viewer-a), var(--viewer-b)); }
#viewer canvas { display: block; }
.labels { position: absolute; inset: 0; pointer-events: none; }
.dim { background: var(--panel); color: var(--ink); border: 1px solid var(--line); border-radius: 6px; padding: 2px 7px; font-size: 12px; font-weight: 600; box-shadow: var(--shadow); white-space: nowrap; }
.dim.h { background: var(--accent-soft); }
.vtools { position: absolute; top: 14px; right: 14px; display: flex; gap: 8px; z-index: 2; }
.vtools.left { left: 14px; right: auto; }
aside { background: var(--panel); border-left: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; }
.steps { overflow-y: auto; padding: 8px 20px 24px; flex: 1; }
section.step { border-bottom: 1px solid var(--line); padding: 16px 0; }
section.step:last-child { border-bottom: 0; }
.step h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 10px; display: flex; gap: 8px; align-items: center; }
.step h2 b { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: 11px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { border: 1px solid var(--line); background: var(--chip); color: var(--ink); border-radius: 8px; padding: 7px 11px; font: inherit; font-size: 13px; cursor: pointer; display: inline-flex; align-items: center; gap: 7px; }
.chip:hover { border-color: var(--accent); }
.chip.on { background: var(--accent-soft); border-color: var(--accent); color: var(--ink); font-weight: 600; }
.chip:disabled { opacity: .4; cursor: not-allowed; }
.chip .sw { width: 14px; height: 14px; border-radius: 50%; border: 1px solid rgba(0,0,0,.15); }
.chip svg { display: block; }
.row { display: flex; gap: 10px; align-items: center; margin-top: 10px; flex-wrap: wrap; }
.row label { color: var(--muted); font-size: 13px; min-width: 92px; }
input[type=number], input[type=text], input[type=email], input[type=tel], select, textarea {
  font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 7px 9px; }
input[type=number] { width: 96px; }
.seg { display: grid; grid-template-columns: 28px 1fr auto auto; gap: 8px; align-items: center; margin-top: 8px; }
.seg .n { width: 24px; height: 24px; border-radius: 6px; display: grid; place-items: center; background: var(--chip); font-weight: 600; font-size: 12px; }
.seg input { width: 100%; }
.cards { display: grid; gap: 8px; margin-top: 10px; }
.card { display: grid; grid-template-columns: 64px 1fr auto; gap: 10px; align-items: center; text-align: left; border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; background: var(--panel); color: var(--ink); cursor: pointer; font: inherit; }
.card:hover { border-color: var(--accent); }
.card.on { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft) inset; background: var(--accent-soft); }
.card .t { font-weight: 600; font-size: 13px; }
.card .m { color: var(--muted); font-size: 12px; }
.card .p { font-weight: 600; font-size: 13px; text-align: right; white-space: nowrap; }
.badge { display: inline-block; font-size: 10.5px; padding: 1px 6px; border-radius: 5px; background: var(--chip); color: var(--muted); margin-right: 4px; margin-top: 3px; }
.badge.ok { background: var(--accent-soft); color: var(--accent); }
.badge.est { background: var(--warn-bg); color: var(--warn); }
.warns { margin-top: 10px; display: grid; gap: 6px; }
.warn { background: var(--warn-bg); color: var(--warn); border-radius: 8px; padding: 7px 10px; font-size: 12.5px; margin: 6px 0 0; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.btn { font: inherit; font-weight: 600; border-radius: 9px; padding: 9px 14px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); cursor: pointer; display: inline-flex; gap: 8px; align-items: center; box-shadow: var(--shadow); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.ghost { box-shadow: none; }
.btn.small { padding: 6px 10px; font-size: 12.5px; }
.pricebar { border-top: 1px solid var(--line); padding: 12px 20px; display: flex; align-items: center; gap: 12px; background: var(--panel); }
.pricebar .total { flex: 1; }
.pricebar .total b { font-size: 19px; letter-spacing: -.01em; }
.pricebar .total div { color: var(--muted); font-size: 12px; }
table.bom { width: 100%; border-collapse: collapse; font-size: 12.5px; margin-top: 8px; }
table.bom td, table.bom th { padding: 6px 4px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.bom th { color: var(--muted); font-weight: 500; text-align: left; }
table.bom td.num, table.bom th.num { text-align: right; white-space: nowrap; }
table.bom tr.sum td { font-weight: 700; border-bottom: 0; }
details { margin-top: 10px; }
summary { cursor: pointer; color: var(--accent); font-weight: 600; font-size: 13px; }
dialog { border: 1px solid var(--line); border-radius: 14px; background: var(--panel); color: var(--ink); padding: 0; width: min(860px, calc(100vw - 32px)); box-shadow: 0 20px 60px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(10,14,16,.45); }
.dlg-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.dlg-head h3 { margin: 0; font-size: 16px; }
.ar-body, .dlg-body { padding: 18px; }
.ar-grid { display: grid; grid-template-columns: 1fr 260px; gap: 18px; align-items: start; }
.ar-grid.mobile { grid-template-columns: 1fr; }
model-viewer { width: 100%; height: 420px; background: linear-gradient(180deg, var(--viewer-a), var(--viewer-b)); border-radius: 10px; }
.ar-launch { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); }
.ar-qr h3 { margin: 0 0 6px; font-size: 15px; }
.qr { background: #fff; padding: 8px; border-radius: 10px; width: 220px; margin: 10px 0; }
.qr svg { width: 100%; height: auto; display: block; }
.share { width: 100%; font-size: 11px; }
.form { display: grid; gap: 10px; }
.form label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.dxf-prev { display: flex; gap: 14px; align-items: center; margin: 10px 0; }
.dxf-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 900px) {
  main { grid-template-columns: 1fr; grid-template-rows: 46vh 1fr; height: auto; min-height: calc(100% - 56px); }
  aside { border-left: 0; border-top: 1px solid var(--line); }
  .steps { overflow: visible; padding: 4px 16px 16px; }
  .pricebar { position: sticky; bottom: 0; padding: 10px 16px; }
  header { padding: 0 16px; }
  header .sub { display: none; }
  .ar-grid { grid-template-columns: 1fr; }
  .vtools .btn span { display: none; }
}
header nav { margin-left: auto; display: flex; gap: 4px; }
header nav a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 13px; padding: 6px 10px; border-radius: 8px; }
header nav a:hover { color: var(--ink); background: var(--chip); }
header nav a.on { color: var(--accent); background: var(--accent-soft); }
input[type=range] { accent-color: var(--accent); flex: 1; min-width: 120px; }
.side { display: grid; grid-template-columns: 70px 1fr; gap: 8px; align-items: center; margin-top: 8px; }
.side .n { font-size: 13px; color: var(--muted); }


[hidden] { display: none !important; }