:root {
  --navy: #12233f; --navy-2: #1d3557; --red: #c8281a; --ink: #18212d; --ink-2: #4f5d6e; --muted: #8592a3;
  --line: #dde3ea; --bg: #f3f5f8; --card: #ffffff; --ok: #1f8a4c; --bad: #d93025; --warn: #c77700;
  --accent: #f28c28;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { font: 14px/1.5 'IBM Plex Sans Arabic', Tahoma, sans-serif; color: var(--ink); background: var(--bg); overflow: hidden; }
button, input, select { font: inherit; }
button { cursor: pointer; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 8px; padding: 6px 12px; }
button:hover { border-color: #b9c3cf; }
button.primary { background: var(--red); border-color: var(--red); color: #fff; font-weight: 600; }
button.primary:hover { filter: brightness(1.06); }
button:disabled { opacity: 0.45; cursor: default; }
button.big { padding: 10px 20px; font-size: 15px; }
input, select { border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; background: #fff; color: var(--ink); min-width: 0; }
input:focus, select:focus { outline: 2px solid rgba(200, 40, 26, 0.25); border-color: var(--red); }
.mono { font-family: ui-monospace, Menlo, monospace; direction: ltr; unicode-bidi: isolate; }

/* ---------------- header ---------------- */
.bar { height: 58px; display: flex; align-items: center; gap: 16px; padding: 0 16px; background: var(--navy); color: #fff; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 30px; background: #fff; border-radius: 6px; padding: 3px 6px; }
.brand b { display: block; font-size: 15px; line-height: 1.1; }
.brand small { color: #9fb3cc; font-size: 11px; }
.proj { flex: 1; min-width: 0; color: #dbe4ef; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.actions { display: flex; align-items: center; gap: 6px; }
.actions button { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.16); color: #fff; }
.actions button:hover { background: rgba(255, 255, 255, 0.16); }
.actions button.primary { background: var(--red); border-color: var(--red); }
.sep { width: 1px; height: 26px; background: rgba(255, 255, 255, 0.2); margin: 0 4px; }
.seg { display: flex; border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; background: transparent; }
.seg button.on { background: #fff; color: var(--navy); font-weight: 700; }
.odoo { font-size: 12px; padding: 3px 10px; border-radius: 999px; background: rgba(255, 255, 255, 0.1); color: #c9d4e2; white-space: nowrap; }
.odoo.ok { background: rgba(31, 138, 76, 0.25); color: #9be3b8; }
.odoo.off { background: rgba(217, 48, 37, 0.25); color: #ffb3ad; }

/* ---------------- layout ---------------- */
.layout { height: calc(100% - 58px); display: grid; grid-template-columns: 300px 1fr 330px; }
@media (max-width: 1280px) { .layout { grid-template-columns: 250px 1fr 290px; } .brand div { display: none; } }
.walls-tbl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
.walls-tbl label { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 2px 6px; font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 8px; padding: 4px 6px; }
.walls-tbl input { width: 100%; text-align: center; direction: ltr; padding: 3px 4px; }
.walls-tbl small { grid-column: 1 / -1; font-size: 11px; }
.opening { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)) auto; gap: 6px; align-items: end; padding: 8px; margin-bottom: 6px; border: 1px solid var(--line); border-radius: 10px; }
.opening label { display: grid; gap: 2px; font-size: 12px; color: var(--muted); }
.opening .wall { grid-column: 1 / -1; }
.opening input { width: 100%; text-align: center; direction: ltr; }
.opening select { width: 100%; }
.stage { position: relative; min-width: 0; background: #e7ebef; }
.stage canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.empty { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 10px; padding: 24px; background: var(--bg); z-index: 2; }
.empty[hidden] { display: none; }
.empty img { height: 54px; margin-bottom: 6px; }
.empty h1 { margin: 0; font-size: 26px; color: var(--navy); }
.empty p { margin: 0 0 12px; color: var(--ink-2); max-width: 520px; }
.navbtns { position: absolute; top: 12px; left: 12px; display: flex; gap: 8px; z-index: 1; }
.navbtns button { height: 40px; min-width: 40px; padding: 0 12px; font-size: 18px; border-radius: 10px; background: rgba(255,255,255,0.95); box-shadow: 0 2px 8px rgba(18,35,63,0.12); }
.navbtns button.wide { font-size: 14px; font-weight: 700; background: var(--red); border-color: var(--red); color: #fff; }
.empty:not([hidden]) ~ .navbtns { display: none; }
.navbtns.tools { top: 60px; flex-wrap: wrap; max-width: calc(100% - 24px); }
.navbtns.tools button { font-size: 13px; font-weight: 600; height: 36px; }
.navbtns.tools button.on { background: var(--navy); border-color: var(--navy); color: #fff; }
.navbtns.tools button.photo { background: var(--navy); border-color: var(--navy); color: #fff; }
.stage.tool-on canvas { cursor: crosshair; }
.status span.tool { color: var(--navy); border-color: var(--navy); font-weight: 600; }
button.mini { padding: 1px 8px; font-size: 11.5px; font-weight: 500; margin-inline-start: 6px; }
.meas { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.meas li { display: flex; justify-content: space-between; align-items: center; gap: 6px; padding: 4px 8px; border: 1px solid var(--line); border-radius: 8px; font-size: 12.5px; }
.meas li button { padding: 0 8px; font-size: 12px; }
button.block { width: 100%; margin-top: 12px; padding: 10px; font-size: 14px; }
.status { position: absolute; inset: auto 12px 12px 12px; display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-start; pointer-events: none; z-index: 1; }
.status span { pointer-events: auto; background: rgba(255, 255, 255, 0.94); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; font-size: 12.5px; color: var(--ink-2); box-shadow: 0 2px 8px rgba(18, 35, 63, 0.08); }
.status span.bad { color: var(--bad); border-color: #f3c2bd; }
.status span.ok { color: var(--ok); }

/* ---------------- toolbox ---------------- */
.toolbox { display: flex; flex-direction: column; min-height: 0; background: var(--card); border-inline-end: 1px solid var(--line); }
.tb-head { padding: 12px; border-bottom: 1px solid var(--line); display: grid; gap: 8px; }
.tb-head b { color: var(--navy); }
.tb-body { flex: 1; overflow: auto; padding: 6px 8px 12px; }
.tb-hint { margin: 0; padding: 8px 12px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--line); }
.sec > summary { list-style: none; cursor: pointer; padding: 8px 6px; font-weight: 700; color: var(--navy); font-size: 13px; display: flex; justify-content: space-between; }
.sec > summary::-webkit-details-marker { display: none; }
.sec > summary::after { content: '▾'; color: var(--muted); }
.sec:not([open]) > summary::after { content: '◂'; }
.fam > summary { list-style: none; cursor: pointer; padding: 6px 8px; margin: 2px 0; border-radius: 8px; display: flex; justify-content: space-between; align-items: center; gap: 6px; color: var(--ink); }
.fam > summary:hover { background: var(--bg); }
.fam > summary::-webkit-details-marker { display: none; }
.fam > summary .n { font-size: 11px; color: var(--muted); background: var(--bg); border-radius: 999px; padding: 0 8px; }
.cards { display: grid; gap: 6px; padding: 2px 4px 8px; }
.pc { display: grid; grid-template-columns: 52px 1fr auto; gap: 8px; align-items: center; padding: 6px; border: 1px solid var(--line); border-radius: 10px; background: #fff; cursor: grab; user-select: none; }
.pc:hover { border-color: var(--red); box-shadow: 0 2px 10px rgba(200, 40, 26, 0.1); }
.pc:active { cursor: grabbing; }
.pc .im { width: 52px; height: 52px; border-radius: 8px; background: var(--bg) center / contain no-repeat; display: grid; place-items: center; color: var(--muted); font-size: 11px; overflow: hidden; }
.pc .im img { width: 100%; height: 100%; object-fit: contain; }
.pc .t { font-size: 12.5px; line-height: 1.35; color: var(--ink); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pc .c { font-size: 11px; color: var(--muted); }
.pc .add { width: 28px; height: 28px; padding: 0; border-radius: 50%; font-size: 16px; line-height: 1; color: var(--red); }
.pc.quote { border-color: #f1c9c4; background: #fff8f7; }
.tb-empty { color: var(--muted); padding: 12px; font-size: 13px; }

/* ---------------- right panel ---------------- */
.panel { overflow: auto; background: var(--card); border-inline-start: 1px solid var(--line); padding: 14px; }
.panel h2 { margin: 0 0 4px; font-size: 16px; color: var(--navy); }
.panel h3 { margin: 18px 0 8px; font-size: 13px; color: var(--ink-2); text-transform: none; }
.panel .sub { color: var(--muted); font-size: 12.5px; margin: 0 0 10px; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; font-size: 13px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.fields { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.fields label { display: grid; gap: 2px; font-size: 12px; color: var(--muted); }
.fields input { width: 100%; text-align: center; direction: ltr; }
.row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.row button { flex: 1; }
.thumb { width: 100%; height: 150px; border-radius: 12px; background: var(--bg); display: grid; place-items: center; overflow: hidden; margin-bottom: 10px; }
.thumb img { max-width: 100%; max-height: 100%; object-fit: contain; }
.specs { font-size: 12.5px; color: var(--ink-2); max-height: 160px; overflow: auto; background: var(--bg); border-radius: 8px; padding: 8px 10px; direction: ltr; text-align: left; }
.probs { margin: 10px 0 0; padding: 0; list-style: none; display: grid; gap: 4px; }
.probs li { font-size: 12.5px; color: var(--bad); background: #fdecea; border-radius: 8px; padding: 4px 10px; }
.probs li.warn { color: var(--warn); background: #fff4e0; }
.list { margin: 0; padding: 0; list-style: none; display: grid; gap: 2px; }
.list li { display: flex; justify-content: space-between; gap: 8px; padding: 5px 8px; border-radius: 8px; cursor: pointer; font-size: 13px; }
.list li:hover { background: var(--bg); }
.list li .st { font-size: 11.5px; color: var(--ok); white-space: nowrap; }
.list li .st.bad { color: var(--bad); }
.list li .st.muted { color: var(--muted); }
.tag { display: inline-block; font-size: 11px; border-radius: 999px; padding: 0 8px; background: var(--bg); color: var(--ink-2); }
.toggle { display: flex; align-items: center; gap: 8px; font-size: 13px; margin-top: 10px; }

/* ---------------- dialogs ---------------- */
dialog { border: 0; border-radius: 16px; padding: 0; width: min(760px, 94vw); max-height: 90vh; box-shadow: 0 30px 80px rgba(10, 20, 40, 0.35); color: var(--ink); }
dialog::backdrop { background: rgba(10, 20, 40, 0.45); }
.dlg-h { padding: 16px 20px; background: var(--navy); color: #fff; display: flex; justify-content: space-between; align-items: center; }
.dlg-h b { font-size: 16px; }
.dlg-h button { background: transparent; border: 0; color: #fff; font-size: 20px; padding: 0 6px; }
.dlg-b { padding: 18px 20px; overflow: auto; max-height: calc(90vh - 130px); }
.dlg-f { padding: 12px 20px; border-top: 1px solid var(--line); display: flex; gap: 8px; justify-content: flex-start; }
.step { margin-bottom: 18px; }
.step > b { display: block; color: var(--navy); margin-bottom: 8px; }
.step .n { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--red); color: #fff; font-size: 12px; margin-inline-end: 6px; }
.inline { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.inline input[type=text] { flex: 1; min-width: 160px; }
.grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.grid4 label { display: grid; gap: 3px; font-size: 12.5px; color: var(--ink-2); }
.grid4 input, .grid4 select { width: 100%; }
.pv-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 16px; align-items: start; }
.pv-img { position: relative; border-radius: 12px; overflow: hidden; background: #0e1b2e; }
.pv-img img, .pv-img canvas { display: block; width: 100%; height: auto; }
.pv-img .bar { position: absolute; inset: auto 0 0 0; height: 5px; background: rgba(255,255,255,0.2); display: block; }
.pv-img .bar i { display: block; height: 100%; width: 0; background: var(--red); transition: width 0.4s; }
.pv-f { display: grid; gap: 4px; margin-bottom: 12px; font-size: 13px; }
.pv-f input[type=text] { width: 100%; }
a.btn { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; color: var(--ink); text-decoration: none; background: #fff; }
a.btn[hidden] { display: none; }
dialog:has(.pv-grid) { width: min(1100px, 96vw); }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px 10px; }
.grid3 label { display: grid; gap: 3px; font-size: 12.5px; color: var(--ink-2); }
.grid3 input { width: 100%; }
.shape-btns { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.shape-btns button { display: grid; justify-items: center; gap: 2px; padding: 6px 8px; font-size: 11.5px; min-width: 92px; }
.shape-btns button.on { border-color: var(--red); background: #fff4f2; color: var(--red); font-weight: 700; }
.shape-btns svg { display: block; }
.shape-body { display: grid; grid-template-columns: 1fr 300px; gap: 14px; align-items: start; }
.shape-prev { border: 1px solid var(--line); border-radius: 12px; background: #fff; min-height: 180px; display: grid; place-items: center; }
.shape-note { font-size: 12px; margin: 8px 0; }
.toggle[hidden] { display: none; }
.qbox { border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; margin-top: 10px; background: var(--bg); }
.qbox table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.qbox td { padding: 4px 6px; border-top: 1px solid var(--line); vertical-align: top; }
.qbox tr:first-child td { border-top: 0; }
.muted { color: var(--muted); }
.err { color: var(--bad); }
.proj-list { display: grid; gap: 6px; }
.proj-list button { text-align: start; display: flex; justify-content: space-between; gap: 10px; padding: 10px 12px; }

/* ---------------- pit variants ---------------- */
dialog:has(.variants) { width: min(1100px, 96vw); }
dialog:has(.pit-models) { width: min(1320px, 97vw); }
.variants.pit-models { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.variants.concepts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.variant ul, .concept-box ul { margin: 0; padding-inline-start: 18px; font-size: 13px; color: var(--ink-2); display: grid; gap: 2px; }
.tag.ok-tag { background: #e8f6ee; color: #137a47; }
details.specs { border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px; margin: 6px 0; }
details.specs summary { cursor: pointer; font-size: 13px; }
.specs-text { white-space: pre-wrap; font-size: 12px; color: var(--ink-2); max-height: 260px; overflow: auto; direction: ltr; text-align: left; margin-top: 6px; }
a.btn { display: inline-flex; align-items: center; padding: 4px 10px; border: 1px solid var(--line); border-radius: 8px; color: inherit; text-decoration: none; font-size: 12.5px; }
.pc .fixed { color: #18a05e; font-size: 11px; border: 1px solid #18a05e; border-radius: 6px; padding: 0 4px; }
.tb-body summary .en { color: var(--ink-2); font-size: 11px; font-weight: 400; direction: ltr; unicode-bidi: isolate; }
.tb-body summary .ar { color: var(--ink-2); font-size: 11.5px; font-weight: 400; }
.pc .list-only { color: var(--ink-2); font-size: 11px; border: 1px solid var(--line); border-radius: 6px; padding: 0 4px; }
.fin-block { border: 1px solid var(--line); border-radius: 10px; padding: 8px; display: grid; gap: 6px; margin: 6px 0; }
.fin-block .fin-h { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.fin-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.fin-row select { flex: 1; min-width: 0; }
.fin-row label.inline, label.inline { display: inline-flex; align-items: center; gap: 4px; font-size: 12.5px; }
label.inline input { width: 64px; }
.swatches { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.sw { width: 26px; height: 26px; padding: 0; border-radius: 7px; border: 1px solid rgba(0, 0, 0, 0.18); cursor: pointer; }
.sw.on { outline: 2px solid var(--red); outline-offset: 2px; }
.sw-name { font-size: 12px; color: var(--ink-2); }
.fin-block p.sub { margin: 0; }
.concept-box { border: 1px solid var(--line); border-radius: 12px; padding: 10px; margin: 12px 0 4px; display: grid; gap: 6px; background: var(--bg); }
.concept-box .concept-h { display: flex; align-items: center; gap: 8px; }
.concept-box p { margin: 0; font-size: 12.5px; }
.concept-box .row { margin: 2px 0 0; flex-wrap: wrap; }
.sunken-form { display: grid; grid-template-columns: 1fr 440px; gap: 16px; align-items: start; }
.sunken-form .fields label { font-size: 12px; }
.rot-row button { flex: 0 1 auto; padding: 4px 8px; font-size: 12px; }
.variants { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.variant { border: 1px solid var(--line); border-radius: 14px; padding: 10px; display: grid; gap: 6px; align-content: start; }
.variant.on { border-color: var(--red); box-shadow: 0 0 0 2px rgba(200, 40, 26, 0.15); }
.variant img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 10px; background: var(--bg); }
.variant p { margin: 0; font-size: 13px; color: var(--ink-2); }

/* ---------------- sheets viewer ---------------- */
dialog:has(.sheets-b) { width: min(1500px, 97vw); }
.sheets-b { max-height: calc(90vh - 120px); }
.sheet-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.sheet-tabs button.on { background: var(--navy); color: #fff; border-color: var(--navy); }
.sheet-tabs button b { color: var(--red); margin-inline-end: 4px; }
.sheet-tabs button.on b { color: #ff9a8c; }
.sheet-view { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff; }
.sheet-view svg { display: block; width: 100%; height: auto; }

/* ---------------- realistic renders ---------------- */
.rv-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.rv { display: grid; grid-template-columns: auto 120px 1fr; gap: 10px; align-items: center; border: 1px solid var(--line); border-radius: 12px; padding: 8px; position: relative; overflow: hidden; cursor: pointer; }
.rv img { width: 120px; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 8px; background: var(--bg); }
.rv span { display: grid; gap: 2px; }
.rv small { color: var(--muted); }
.rv .bar { position: absolute; inset: auto 0 0 0; height: 4px; background: var(--bg); }
.rv .bar i { display: block; height: 100%; width: 0; background: var(--red); transition: width 0.4s; }
.rv.busy { border-color: var(--red); }
.rv-live { margin-top: 12px; display: flex; gap: 12px; align-items: center; }
.rv-live canvas { width: 320px; aspect-ratio: 16 / 9; border-radius: 10px; background: #0b1119; }

/* ---------------- stale-copy warning ---------------- */
.stale { position: fixed; top: 66px; left: 50%; transform: translateX(-50%); z-index: 60; background: #fff4e0; color: #7a4a00; border: 1px solid #f0c674; border-radius: 12px; padding: 10px 16px; box-shadow: 0 10px 30px rgba(10,20,40,0.2); font-weight: 600; }
.stale button { margin-inline-start: 10px; background: var(--red); border-color: var(--red); color: #fff; }

/* ---------------- toasts ---------------- */
.toasts { position: fixed; inset: auto auto 18px 50%; transform: translateX(-50%); display: grid; gap: 6px; z-index: 50; }
.toast { background: var(--navy); color: #fff; padding: 8px 16px; border-radius: 10px; box-shadow: 0 8px 24px rgba(10, 20, 40, 0.3); font-size: 13.5px; animation: in 0.2s ease; }
.toast.bad { background: var(--bad); }
@keyframes in { from { opacity: 0; transform: translateY(6px); } }