:root {
  --bg: #f4f2ee;
  --panel: #ffffff;
  --ink: #1f2a30;
  --muted: #6b767c;
  --line: #e3e0da;
  --accent: #c9782f;
  --accent-ink: #ffffff;
  --accent-soft: #f6e7d8;
  --ok: #2f8a4f;
  --err: #b8382f;
  --warn-bg: #fff6e0;
  --warn-line: #f0d48a;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(20, 30, 35, .06), 0 4px 16px rgba(20, 30, 35, .05);
  --panel-w: 380px;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); display: flex; flex-direction: column; min-height: 100vh; }
button, input, select { font: inherit; color: inherit; }

.banner {
  background: repeating-linear-gradient(-45deg, #2b3439, #2b3439 14px, #323c42 14px, #323c42 28px);
  color: #ffd79c; text-align: center; font-size: 13px; font-weight: 600; letter-spacing: .02em;
  padding: 6px 12px;
}
.banner.demo { background: repeating-linear-gradient(-45deg, #8a3b12, #8a3b12 14px, #9a4516 14px, #9a4516 28px); color: #fff; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 18px; background: var(--panel); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand svg { flex: none; }
.brand-name { font-weight: 800; font-size: 18px; letter-spacing: -.01em; }
.brand-name span { color: var(--accent); }
.brand-tag { font-size: 12px; color: var(--muted); }
.top-actions { display: flex; align-items: center; gap: 10px; }
.top-actions select { border: 1px solid var(--line); border-radius: 8px; padding: 5px 8px; background: #fff; }
.mode { font-size: 12px; padding: 3px 9px; border-radius: 999px; background: #eef1f2; color: var(--muted); white-space: nowrap; }
.mode.live { background: #e3f3e8; color: var(--ok); }
.mode.mock { background: #fdf0dc; color: #94591c; }
.mode::before { content: "●"; margin-right: 5px; font-size: 9px; vertical-align: 1px; }
.mode:empty { display: none; }

.layout { flex: 1; display: grid; grid-template-columns: var(--panel-w) 1fr; min-height: 0; }

/* ---------- panel ---------- */
.panel { background: var(--bg); border-right: 1px solid var(--line); overflow-y: auto; padding: 14px; max-height: calc(100vh - 100px); position: sticky; top: 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-bottom: 12px; box-shadow: var(--shadow); }
.card h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 12px; display: flex; justify-content: space-between; align-items: center; }
.field { display: flex; flex-direction: column; gap: 5px; font-size: 13px; margin-bottom: 10px; }
.field > span { color: var(--muted); font-size: 12px; }
.field input[type=text], .field select {
  border: 1px solid var(--line); border-radius: 8px; padding: 7px 9px; background: #fff; width: 100%; min-width: 0;
}
.field input:focus, .field select:focus, .val input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.invalid { border-color: var(--err) !important; background: #fdf1f0 !important; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grid4 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 10px; }
.grid4 .field { margin-bottom: 8px; }

.slider { margin-bottom: 14px; }
.slider-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.slider-head label { font-weight: 600; font-size: 13px; }
.val { display: inline-flex; align-items: center; gap: 4px; }
.val input { width: 108px; text-align: right; border: 1px solid var(--line); border-radius: 7px; padding: 4px 7px; font-variant-numeric: tabular-nums; font-weight: 600; }
.val em { font-style: normal; color: var(--muted); font-size: 12px; min-width: 18px; }
.range-ends { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); }
.range-ends .hint { color: var(--accent); font-weight: 600; }
input[type=range] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 26px; background: transparent; margin: 2px 0; touch-action: pan-y;
}
input[type=range]::-webkit-slider-runnable-track { height: 6px; border-radius: 3px; background: linear-gradient(90deg, var(--accent) var(--fill, 50%), #e4e0d9 var(--fill, 50%)); }
input[type=range]::-moz-range-track { height: 6px; border-radius: 3px; background: linear-gradient(90deg, var(--accent) var(--fill, 50%), #e4e0d9 var(--fill, 50%)); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 2px solid var(--accent); margin-top: -7px; box-shadow: 0 1px 4px rgba(0,0,0,.2); cursor: grab; }
input[type=range]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: #fff; border: 2px solid var(--accent); cursor: grab; }

.seg { display: flex; gap: 6px; flex-direction: row; }
.seg-btn { flex: 1; border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 7px; cursor: pointer; font-weight: 600; font-size: 13px; }
.seg-btn.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

/* położenie otworu: odniesienie + odległość + suwak + pasek ściany */
.pos { border-top: 1px dashed var(--line); padding-top: 9px; margin-top: 2px; }
.pos-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 6px; font-size: 12px; color: var(--muted); }
.pos-head small { font-size: 11px; }
.seg-sm { gap: 4px; }
.seg-sm .seg-btn { padding: 4px 8px; font-size: 12px; flex: 0 0 auto; }
.pos .slider-head label { font-weight: 500; font-size: 12px; color: var(--ink, #222); }
.pos-bar { position: relative; height: 16px; margin: 6px 14px 0; border-radius: 3px; background: repeating-linear-gradient(90deg, #ead7b6 0 6px, #e3cca5 6px 7px); border: 1px solid #cfb58a; }
.pos-bar i { position: absolute; top: 2px; bottom: 0; background: #fff; border: 1px solid #b9a27a; border-bottom: 0; }
.pos-bar i.door { top: 1px; }
.pos-bar i.me { background: var(--accent-soft, #f4dcc4); border-color: var(--accent); border-width: 2px; }
.pos-bar .lbl { position: absolute; top: -1px; font-size: 10px; color: #8a6d45; font-weight: 700; }
.pos-bar .lbl.l { left: -12px; } .pos-bar .lbl.r { right: -12px; }
.pos .range-ends .hint { color: var(--err); }

.opening.win, .opening.door-card { border: 1px dashed var(--line); border-radius: 10px; padding: 10px; margin-bottom: 10px; }
.win-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-size: 13px; }
.btn-small { border: 1px solid var(--accent); color: var(--accent); background: #fff; border-radius: 999px; padding: 3px 10px; font-size: 12px; cursor: pointer; text-transform: none; letter-spacing: 0; font-weight: 600; }
.btn-small:disabled { opacity: .4; cursor: default; }
.btn-link { border: 0; background: none; color: var(--err); cursor: pointer; font-size: 12px; padding: 2px 4px; }
.check { display: flex; gap: 8px; align-items: center; font-size: 14px; margin-bottom: 12px; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }
.muted { color: var(--muted); font-size: 13px; margin: 0 0 6px; }
.errors { background: #fdf1f0; border: 1px solid #f0c3bf; color: var(--err); border-radius: var(--radius); padding: 10px 14px; font-size: 13px; }
.errors ul { margin: 0; padding-left: 18px; }
.errors p { margin: 6px 0 0; color: #7c2b25; }

/* ---------- podgląd ---------- */
.stage { display: flex; flex-direction: column; min-width: 0; padding: 14px; gap: 12px; }
.viewer-wrap { position: relative; flex: 1; min-height: 420px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line);
  background: radial-gradient(ellipse at 50% 30%, #ffffff 0%, #eef0ef 55%, #dfe3e2 100%); box-shadow: var(--shadow); }
.viewer { position: absolute; inset: 0; }
.viewer canvas { display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; }
.viewer canvas:active { cursor: grabbing; }
.viewer-tools { position: absolute; top: 10px; left: 10px; right: 10px; display: flex; flex-wrap: wrap; gap: 6px; pointer-events: none; }
.tog, .tog-btn { pointer-events: auto; display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,.92); backdrop-filter: blur(6px);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 11px; font-size: 12px; font-weight: 600; cursor: pointer; user-select: none; }
.tog input { accent-color: var(--accent); margin: 0; }
.tog-btn { margin-left: auto; }
.spinner { position: absolute; right: 12px; bottom: 12px; display: flex; gap: 8px; align-items: center; background: rgba(255,255,255,.92); padding: 6px 12px; border-radius: 999px; font-size: 12px; }
.spinner span, .btn-spin { width: 14px; height: 14px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; display: inline-block; }
.spinner span { color: var(--accent); }
@keyframes spin { to { transform: rotate(360deg); } }
[hidden] { display: none !important; }
.pick { position: absolute; z-index: 3; max-width: 240px; background: #1f2a30; color: #fff; border-radius: 10px; padding: 8px 11px; font-size: 12px; line-height: 1.45; box-shadow: 0 6px 20px rgba(0,0,0,.25); pointer-events: none; }
.pick b { display: block; font-size: 13px; }
.pick small { display: block; color: #a9b6bc; margin-bottom: 3px; }
.viewer-err { position: absolute; z-index: 2; left: 50%; top: 56px; transform: translateX(-50%); width: min(440px, calc(100% - 24px));
  background: rgba(253, 241, 240, .96); border: 1px solid #f0c3bf; color: var(--err); border-radius: 10px; padding: 9px 13px; font-size: 13px; box-shadow: var(--shadow); }
.viewer-err ul { margin: 4px 0 0; padding-left: 18px; }
.legend { position: absolute; left: 10px; bottom: 10px; background: rgba(255,255,255,.92); border: 1px solid var(--line); border-radius: 10px; padding: 6px 10px; font-size: 12px; max-width: 220px; }
.legend summary { cursor: pointer; font-weight: 600; }
.legend ul { list-style: none; margin: 6px 0 2px; padding: 0; columns: 2; column-gap: 12px; }
.legend li { display: flex; align-items: center; gap: 6px; margin: 2px 0; break-inside: avoid; }
.legend i { width: 11px; height: 11px; border-radius: 3px; border: 1px solid rgba(0,0,0,.15); flex: none; }

/* ---------- wyniki ---------- */
.results { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: start; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; box-shadow: var(--shadow); min-width: 0; }
.stat span { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.stat b { display: block; font-size: 17px; margin-top: 3px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.stat small { display: block; font-size: 10.5px; color: var(--muted); margin-top: 2px; }
.cta { display: flex; flex-direction: column; align-items: stretch; gap: 6px; min-width: 220px; max-width: 280px; }
.stats.stale { opacity: .45; filter: grayscale(.6); transition: opacity .2s; }
.btn-primary { display: inline-flex; justify-content: center; align-items: center; gap: 8px; background: var(--accent); color: var(--accent-ink); border: 0; border-radius: var(--radius);
  padding: 14px 20px; font-size: 15px; font-weight: 700; cursor: pointer; box-shadow: 0 4px 14px rgba(201,120,47,.35); transition: transform .1s, background .15s; }
.btn-primary:hover:not(:disabled) { background: #b5681f; }
.btn-primary:active:not(:disabled) { transform: translateY(1px); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; box-shadow: none; }
.btn-primary.busy { opacity: .85; cursor: progress; }
.pdf-msg { font-size: 12px; min-height: 16px; text-align: center; }
.pdf-msg.ok { color: var(--ok); }
.pdf-msg.err { color: var(--err); }
.warnings { grid-column: 1 / -1; background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: var(--radius); padding: 10px 14px; }
.warnings h3 { margin: 0 0 6px; font-size: 13px; color: #8a5a00; }
.warnings ul { margin: 0; padding-left: 18px; font-size: 13px; line-height: 1.5; }
.foot { font-size: 11.5px; color: var(--muted); text-align: center; padding: 4px 0 8px; }

/* ---------- responsywność ---------- */
@media (max-width: 1100px) {
  .results { grid-template-columns: 1fr; }
  .cta { max-width: none; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  :root { --radius: 10px; }
  .layout { display: flex; flex-direction: column; }
  .stage { order: 1; padding: 10px 10px 0; }
  .panel { order: 2; position: static; max-height: none; overflow: visible; border-right: 0; padding: 10px; }
  .viewer-wrap { min-height: 0; height: 56vh; flex: none; }
  .brand-tag { display: none; }
  .topbar { padding: 8px 12px; }
  .brand { min-width: 0; }
  .brand-name { font-size: 16px; white-space: nowrap; }
  .top-actions { min-width: 0; gap: 6px; }
  .mode { font-size: 11px; max-width: 42vw; overflow: hidden; text-overflow: ellipsis; }
  .banner { font-size: 12px; padding: 5px 10px; }
  .tog, .tog-btn { padding: 4px 9px; font-size: 11.5px; }
  .tog-btn { margin-left: 0; }
  .legend { display: none; }
  .val input { width: 96px; }
  .foot { order: 3; }
}
@media (max-width: 380px) {
  .grid4, .row2 { grid-template-columns: 1fr; }
}

/* styl konstrukcji + próg prawny (2026-10-30) */
.seg-style .seg-btn { font-size: 12px; padding: 7px 4px; line-height: 1.2; }
.style-desc { margin: 8px 0 4px; font-size: 12.5px; line-height: 1.45; }
#loft:empty { display: none; }
#loft { margin-top: 10px; }
.legal { grid-column: 1 / -1; border-radius: var(--radius); padding: 10px 14px; border: 1px solid #b9d7c0; background: #eef7f0; }
.legal.local { border-color: var(--warn-line); background: var(--warn-bg); }
.legal.over { border-color: #e2a3a3; background: #fbeeee; }
.legal h3 { margin: 0 0 6px; font-size: 13px; display: flex; gap: 8px; align-items: center; }
.legal h3 em { font-style: normal; font-size: 11px; font-weight: 700; padding: 1px 8px; border-radius: 99px; background: #2f7d4a; color: #fff; }
.legal.local h3 em { background: #b07600; }
.legal.over h3 em { background: #b23b3b; }
.legal p { margin: 0 0 6px; font-size: 13px; line-height: 1.5; }
.legal ul { margin: 0; padding-left: 18px; font-size: 12px; line-height: 1.45; color: var(--muted); }
.legal a { color: inherit; }

/* ---------- ścianki wewnętrzne: panel + rzut 2D ---------- */
.iw-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.iw-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.iw-chip { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 4px 10px; font-size: 12px; font-weight: 600; cursor: pointer; }
.iw-chip.on { border-color: var(--accent); background: var(--accent-soft); color: #8a4a12; }
.iw-panel { border: 1px dashed var(--accent); border-radius: 10px; padding: 10px; margin-bottom: 10px; }
.iw-panel .seg { margin-bottom: 8px; }
.iw-panel .note { font-size: 11.5px; color: var(--muted); margin: -4px 0 8px; }
.iw-door { border-top: 1px dashed var(--line); padding-top: 8px; margin-top: 6px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.iw-mats table { width: 100%; border-collapse: collapse; font-size: 12px; }
.iw-mats h3 { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 6px 0; }
.iw-mats td { padding: 3px 4px; border-bottom: 1px solid var(--line); vertical-align: top; }
.iw-mats td.n { text-align: right; white-space: nowrap; }
.iw-mats tr.sum td { font-weight: 700; border-bottom: 0; }
.view-tabs { max-width: 420px; }
.plan { position: absolute; inset: 0; z-index: 1; background: #fbfaf7; }
.plan-svg { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; user-select: none; }
.plan-tools { position: absolute; z-index: 2; top: 10px; left: 10px; right: 10px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; pointer-events: none; }
.plan-tools .tog-btn { margin-left: 0; pointer-events: auto; border-color: var(--accent); color: var(--accent); }
.plan-hint { font-size: 12px; color: var(--muted); background: rgba(255,255,255,.85); border-radius: 8px; padding: 3px 8px; }
.viewer-wrap.plan-mode { min-height: 640px; }
.viewer-wrap.plan-mode .viewer-tools, .viewer-wrap.plan-mode .legend, .viewer-wrap.plan-mode .pick { display: none; }
.viewer-wrap.plan-mode .viewer-err { top: auto; bottom: 12px; pointer-events: none; opacity: .95; }
.pl-sheath { fill: none; stroke: #8f979b; stroke-width: 6; }
.pl-wall { fill: #d9b27a; stroke: #1f2a30; stroke-width: 8; }
.pl-floor { fill: #fffdf8; stroke: #1f2a30; stroke-width: 6; }
.pl-grid line { stroke: #ece6da; stroke-width: 2; }
.pl-grid line.major { stroke: #ddd3c1; stroke-width: 4; }
.pl-gap { fill: #fffdf8; stroke: none; }
.pl-win { stroke: #2f6fa8; stroke-width: 14; }
.pl-leaf { stroke: #1f2a30; stroke-width: 8; }
.pl-arc { fill: none; stroke: #8f979b; stroke-width: 5; stroke-dasharray: 22 16; }
.pl-wname { fill: #8f979b; font-weight: 600; }
.pl-iw-body { fill: #efe2c8; stroke: #1f2a30; stroke-width: 7; cursor: grab; }
.pl-iw.sel .pl-iw-body { fill: #f6d5ae; stroke: var(--accent); stroke-width: 12; }
.pl-iw:hover .pl-iw-body { fill: #f3dcbb; }
.pl-door-hit { cursor: ew-resize; fill: #fffdf8; }
.pl-iw.sel .pl-door-hit { fill: #fff3e3; }
.pl-handle { fill: #fff; stroke: var(--accent); stroke-width: 12; cursor: move; }
.pl-dim line { stroke: #50606a; stroke-width: 4; }
.pl-dim text { fill: #2f3d45; font-weight: 600; paint-order: stroke; stroke: #fffdf8; stroke-width: 14px; }
.pl-dim.sel line { stroke: var(--accent); }
.pl-dim.sel text { fill: #9a4d0f; }
.pl-dim.door text { fill: #2f6fa8; }
.pl-dim-o line { stroke: #8f979b; stroke-width: 4; }
.pl-dim-o text { fill: #6b767c; }
.pl-len { fill: #1f2a30; font-weight: 700; paint-order: stroke; stroke: #fffdf8; stroke-width: 14px; pointer-events: none; }
.pl-len.sel { fill: #9a4d0f; }