:root{
  --bg:#F5F1E8;
  --surface:#FFFFFF;
  --surface-2:#FBF8F2;
  --ink:#20272E;
  --ink-soft:#5C6670;
  --ink-faint:#8C949C;
  --accent:#B0793A;
  --accent-ink:#7A4E1E;
  --accent-soft:#F1E2C9;
  --blue:#2E5A70;
  --blue-soft:#DCE9EC;
  --border:#E4DDC9;
  --good:#3E7D55;
  --good-soft:#DEEDE1;
  --warn:#B0793A;
  --warn-soft:#F1E2C9;
  --bad:#AC432F;
  --bad-soft:#F5DEDA;
  --shadow:0 1px 2px rgba(32,39,46,.06), 0 4px 14px rgba(32,39,46,.05);
  --radius:12px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#171512;
    --surface:#1F1C18;
    --surface-2:#242019;
    --ink:#EDE7DA;
    --ink-soft:#AFA692;
    --ink-faint:#7D7568;
    --accent:#D9A05C;
    --accent-ink:#F2CE9B;
    --accent-soft:#3A2E1C;
    --blue:#7FB0C4;
    --blue-soft:#213238;
    --border:#332E26;
    --good:#7BBE93;
    --good-soft:#20302A;
    --warn:#D9A05C;
    --warn-soft:#3A2E1C;
    --bad:#E08977;
    --bad-soft:#3A2420;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 6px 18px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"]{
  --bg:#171512;
  --surface:#1F1C18;
  --surface-2:#242019;
  --ink:#EDE7DA;
  --ink-soft:#AFA692;
  --ink-faint:#7D7568;
  --accent:#D9A05C;
  --accent-ink:#F2CE9B;
  --accent-soft:#3A2E1C;
  --blue:#7FB0C4;
  --blue-soft:#213238;
  --border:#332E26;
  --good:#7BBE93;
  --good-soft:#20302A;
  --warn:#D9A05C;
  --warn-soft:#3A2E1C;
  --bad:#E08977;
  --bad-soft:#3A2420;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 6px 18px rgba(0,0,0,.35);
}
*{box-sizing:border-box;}
body{
  direction:rtl;
  background:var(--bg);
  color:var(--ink);
  font-family:'Cairo','IBM Plex Sans Arabic',sans-serif;
  min-height:100%;
}
.ltr, .code, .num{ direction:ltr; unicode-bidi:isolate; font-variant-numeric:tabular-nums; }
.code{ font-family:'IBM Plex Mono',monospace; font-size:.82em; }
h1,h2,h3,h4{ font-family:'Cairo',sans-serif; font-weight:700; margin:0; text-wrap:balance; }
p{margin:0;}
button{ font-family:inherit; cursor:pointer; }
input,select,textarea{ font-family:inherit; }
::selection{ background:var(--accent-soft); }

#app{ display:flex; min-height:100vh; width:100%; }

/* ---------- Sidebar ---------- */
#sidebar{
  width:230px; flex:0 0 230px; background:var(--surface); border-inline-start:1px solid var(--border);
  display:flex; flex-direction:column; padding:18px 14px; gap:4px;
  position:sticky; top:0; height:100vh; overflow-y:auto;
}
.brand{ display:flex; align-items:center; gap:10px; padding:6px 8px 18px; }
.brand-mark{ width:34px; height:34px; border-radius:9px; background:linear-gradient(155deg,var(--accent),var(--blue)); flex:0 0 auto; }
.brand-text b{ display:block; font-size:15px; }
.brand-text span{ display:block; font-size:11px; color:var(--ink-faint); }
.nav-item{
  display:flex; align-items:center; gap:10px; padding:10px 12px; border-radius:9px; border:none;
  background:transparent; color:var(--ink-soft); font-size:14px; font-weight:600; text-align:right; width:100%;
}
.nav-item:hover{ background:var(--surface-2); color:var(--ink); }
.nav-item.active{ background:var(--accent-soft); color:var(--accent-ink); }
.nav-icon{ width:18px; height:18px; flex:0 0 auto; display:flex; align-items:center; justify-content:center; }
.nav-sep{ height:1px; background:var(--border); margin:10px 4px; }
.lang-toggle{ display:flex; gap:4px; background:var(--surface-2); border:1px solid var(--border); border-radius:9px; padding:3px; margin:0 8px 14px; }
.lang-toggle button{ flex:1; border:none; background:transparent; padding:6px 0; border-radius:6px; font-size:12px; font-weight:700; color:var(--ink-soft); font-family:inherit; }
.lang-toggle button.active{ background:var(--accent); color:#fff; }
.sidebar-foot{ margin-top:auto; padding:10px 8px 0; font-size:11px; color:var(--ink-faint); border-top:1px solid var(--border); padding-top:12px; }

/* ---------- Main ---------- */
#main{ flex:1 1 auto; min-width:0; display:flex; flex-direction:column; }
#topbar{
  position:sticky; top:0; z-index:5; background:var(--bg); padding:20px clamp(16px,3vw,36px) 10px;
  display:flex; align-items:flex-end; justify-content:space-between; gap:16px; flex-wrap:wrap;
}
#topbar h1{ font-size:22px; }
#topbar .sub{ color:var(--ink-soft); font-size:13px; margin-top:2px; }
.top-actions{ display:flex; gap:8px; flex-wrap:wrap; }
#content{ padding:8px clamp(16px,3vw,36px) 40px; flex:1; }

.btn{
  display:inline-flex; align-items:center; gap:6px; border:1px solid var(--border); background:var(--surface);
  color:var(--ink); padding:9px 15px; border-radius:9px; font-size:13.5px; font-weight:700; white-space:nowrap;
  transition:transform .05s ease;
}
.btn:active{ transform:scale(.97); }
.btn-primary{ background:var(--accent); border-color:var(--accent); color:#fff; }
.btn-ghost{ background:transparent; border-color:transparent; }
.btn-danger{ color:var(--bad); }
.btn-sm{ padding:6px 10px; font-size:12.5px; border-radius:7px; }
.btn:disabled{ opacity:.5; cursor:default; }

.pill{ display:inline-flex; align-items:center; gap:5px; padding:3px 10px; border-radius:99px; font-size:11.5px; font-weight:700; }
.pill-blue{ background:var(--blue-soft); color:var(--blue); }
.pill-good{ background:var(--good-soft); color:var(--good); }
.pill-warn{ background:var(--warn-soft); color:var(--warn); }
.pill-bad{ background:var(--bad-soft); color:var(--bad); }
.pill-neutral{ background:var(--surface-2); color:var(--ink-soft); border:1px solid var(--border); }

.card{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow); }
.grid{ display:grid; gap:14px; }
.grid-stats{ grid-template-columns:repeat(4,1fr); }
.grid-2{ grid-template-columns:2fr 1fr; }
@media (max-width:920px){ .grid-stats{ grid-template-columns:repeat(2,1fr);} .grid-2{ grid-template-columns:1fr; } }
@media (max-width:520px){ .grid-stats{ grid-template-columns:1fr 1fr; } }

.stat-tile{ padding:16px 18px; display:flex; flex-direction:column; gap:6px; }
.stat-tile .stat-label{ font-size:12.5px; color:var(--ink-soft); font-weight:700; display:flex; align-items:center; justify-content:space-between; }
.stat-tile .stat-val{ font-size:28px; font-weight:800; font-family:'IBM Plex Mono',monospace; }
.stat-tile .stat-note{ font-size:11.5px; color:var(--ink-faint); }

.section-head{ display:flex; align-items:center; justify-content:space-between; margin:26px 0 12px; gap:10px; flex-wrap:wrap; }
.section-head h3{ font-size:15.5px; }
.section-head .hint{ font-size:12px; color:var(--ink-faint); font-weight:600; }

.toolbar{ display:flex; gap:10px; flex-wrap:wrap; align-items:center; margin-bottom:14px; }
.search-box{ position:relative; flex:1 1 220px; min-width:180px; }
.search-box input{ width:100%; padding:9px 14px; border-radius:9px; border:1px solid var(--border); background:var(--surface); color:var(--ink); font-size:13.5px; }
.search-box input:focus{ outline:2px solid var(--accent); outline-offset:1px; }
select.filter{ padding:9px 12px; border-radius:9px; border:1px solid var(--border); background:var(--surface); color:var(--ink); font-size:13px; font-weight:600; max-width:220px; }

/* Category tree */
.cat-l1{ margin-bottom:14px; }
.cat-l1-head{ display:flex; align-items:center; justify-content:space-between; padding:13px 16px; }
.cat-l1-head .name{ display:flex; align-items:center; gap:10px; }
.cat-l1-head .name b{ font-size:14.5px; }
.cat-children{ border-top:1px solid var(--border); }
.cat-row{ display:flex; align-items:center; justify-content:space-between; padding:11px 16px 11px 30px; border-bottom:1px solid var(--border); gap:10px; }
.cat-row:last-child{ border-bottom:none; }
.cat-row .name{ display:flex; align-items:baseline; gap:8px; flex-wrap:wrap; }
.cat-row .name b{ font-size:13.5px; }
.cat-row .name span.en{ color:var(--ink-faint); font-size:12px; }
.cat-l3-wrap{ padding:0 16px 12px 44px; display:flex; flex-direction:column; gap:6px; }
.cat-l3-row{ display:flex; align-items:center; justify-content:space-between; padding:7px 12px; border-radius:8px; background:var(--surface-2); font-size:12.5px; }
.row-actions{ display:flex; gap:4px; flex:0 0 auto; }
.icon-btn{ width:28px; height:28px; border-radius:7px; border:1px solid transparent; background:transparent; color:var(--ink-faint); display:flex; align-items:center; justify-content:center; }
.icon-btn:hover{ background:var(--surface-2); color:var(--ink); }
.icon-btn.danger:hover{ background:var(--bad-soft); color:var(--bad); }

/* Items */
.item-card{ padding:16px 18px; display:flex; flex-direction:column; gap:10px; }
.item-top{ display:flex; justify-content:space-between; align-items:flex-start; gap:12px; }
.item-title b{ font-size:14.5px; }
.item-title .en{ color:var(--ink-faint); font-size:12.5px; display:block; margin-top:2px; }
.item-price{ text-align:end; flex:0 0 auto; }
.item-price .amt{ font-size:19px; font-weight:800; color:var(--accent-ink); font-family:'IBM Plex Mono',monospace; }
.item-price .unit{ font-size:11px; color:var(--ink-faint); }
.item-meta{ display:flex; gap:6px; flex-wrap:wrap; }
.comp-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(150px,1fr)); gap:8px; border-top:1px dashed var(--border); padding-top:10px; }
.comp-cell{ background:var(--surface-2); border-radius:8px; padding:7px 10px; }
.comp-cell .k{ font-size:10.5px; color:var(--ink-faint); font-weight:700; }
.comp-cell .v{ font-size:13px; font-weight:700; font-family:'IBM Plex Mono',monospace; margin-top:2px; }
.item-foot{ display:flex; justify-content:flex-end; gap:6px; }

.items-list{ display:flex; flex-direction:column; gap:10px; }

/* Price groups */
.pg-card{ padding:16px 18px; display:flex; flex-direction:column; gap:10px; }
.pg-head{ display:flex; justify-content:space-between; align-items:flex-start; gap:10px; }
.pg-table{ width:100%; border-collapse:collapse; font-size:13px; }
.pg-table th{ text-align:start; font-size:11px; color:var(--ink-faint); font-weight:700; padding:6px 8px; border-bottom:1px solid var(--border); }
.pg-table td{ padding:8px; border-bottom:1px solid var(--border); }
.pg-table tr:last-child td{ border-bottom:none; }

/* Coefficients */
.coef-card{ padding:16px 18px; display:flex; flex-direction:column; gap:12px; }
.coef-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(170px,1fr)); gap:10px; }
.coef-cell{ background:var(--surface-2); border:1px solid var(--border); border-radius:9px; padding:9px 12px; position:relative; }
.coef-cell .k{ font-size:11.5px; color:var(--ink-soft); font-weight:700; margin-bottom:3px; }
.coef-cell .v{ font-size:15px; font-weight:800; font-family:'IBM Plex Mono',monospace; }
.coef-cell .u{ font-size:10.5px; color:var(--ink-faint); }
.coef-cell .del{ position:absolute; top:5px; inset-inline-start:5px; }

/* Projects */
.proj-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:14px; }
.proj-card{ padding:16px 18px; display:flex; flex-direction:column; gap:10px; cursor:pointer; }
.proj-card:hover{ border-color:var(--accent); }
.proj-card .top{ display:flex; justify-content:space-between; align-items:flex-start; gap:8px; }
.proj-card .total{ font-size:20px; font-weight:800; font-family:'IBM Plex Mono',monospace; color:var(--accent-ink); }
.proj-card .meta-row{ display:flex; justify-content:space-between; font-size:12px; color:var(--ink-soft); }

.detail-head{ display:flex; justify-content:space-between; align-items:flex-start; gap:12px; flex-wrap:wrap; margin-bottom:16px; }
.back-link{ display:inline-flex; align-items:center; gap:6px; color:var(--ink-soft); font-size:13px; font-weight:700; margin-bottom:10px; }
.lines-table{ width:100%; border-collapse:collapse; font-size:13.5px; }
.lines-table th{ text-align:start; font-size:11px; color:var(--ink-faint); font-weight:700; padding:8px; border-bottom:1px solid var(--border); }
.lines-table td{ padding:9px 8px; border-bottom:1px solid var(--border); vertical-align:middle; }
.qty-input{ width:70px; padding:5px 7px; border-radius:6px; border:1px solid var(--border); background:var(--surface); color:var(--ink); text-align:center; }
.grand-total{ display:flex; justify-content:space-between; align-items:center; padding:16px 18px; margin-top:14px; }
.grand-total .lbl{ font-size:13px; font-weight:700; color:var(--ink-soft); }
.grand-total .amt{ font-size:26px; font-weight:800; font-family:'IBM Plex Mono',monospace; color:var(--accent-ink); }

.empty{ padding:40px 20px; text-align:center; color:var(--ink-faint); }
.empty b{ display:block; color:var(--ink-soft); font-size:14px; margin-bottom:4px; }

/* Modal */
#modal-backdrop{ position:fixed; inset:0; background:rgba(20,17,12,.45); display:flex; align-items:flex-start; justify-content:center;
  padding:5vh 16px; overflow-y:auto; z-index:50; }
#modal-backdrop[hidden]{ display:none; }
.modal{ background:var(--surface); border-radius:14px; width:100%; max-width:560px; box-shadow:0 20px 60px rgba(0,0,0,.25); }
.modal-head{ display:flex; justify-content:space-between; align-items:center; padding:16px 20px; border-bottom:1px solid var(--border); }
.modal-head h3{ font-size:16px; }
.modal-body{ padding:18px 20px; display:flex; flex-direction:column; gap:12px; max-height:65vh; overflow-y:auto; }
.modal-foot{ padding:14px 20px; border-top:1px solid var(--border); display:flex; justify-content:flex-end; gap:8px; }
.field{ display:flex; flex-direction:column; gap:5px; }
.field label{ font-size:12.5px; font-weight:700; color:var(--ink-soft); }
.field input, .field select, .field textarea{
  padding:9px 12px; border-radius:8px; border:1px solid var(--border); background:var(--surface-2); color:var(--ink); font-size:13.5px; width:100%;
}
.field input:focus, .field select:focus, .field textarea:focus{ outline:2px solid var(--accent); outline-offset:1px; background:var(--surface); }
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:10px; }
.comp-edit-row{ display:grid; grid-template-columns:1fr 1fr 90px 90px 30px; gap:6px; align-items:center; }
.comp-edit-row input{ padding:7px 8px; font-size:12.5px; border-radius:7px; border:1px solid var(--border); background:var(--surface-2); color:var(--ink); width:100%; }
.small-note{ font-size:11.5px; color:var(--ink-faint); }

/* toast */
#toast-wrap{ position:fixed; bottom:20px; inset-inline-end:20px; z-index:100; display:flex; flex-direction:column; gap:8px; }
.toast{ background:var(--ink); color:var(--bg); padding:11px 18px; border-radius:9px; font-size:13px; font-weight:600; box-shadow:var(--shadow); animation:toastin .15s ease; }
@keyframes toastin{ from{ opacity:0; transform:translateY(6px);} to{opacity:1; transform:none;} }

.banner{ background:var(--warn-soft); color:var(--accent-ink); border:1px solid var(--accent); border-radius:10px; padding:10px 16px; font-size:12.5px; font-weight:600; margin-bottom:14px; }

@media (max-width:760px){
  #app{ flex-direction:column; }
  #sidebar{ position:relative; height:auto; width:100%; flex:none; flex-direction:row; align-items:center; overflow-x:auto; padding:10px 12px; }
  .brand{ padding:0 8px 0 0; flex:0 0 auto; }
  .nav-item{ flex-direction:column; gap:3px; font-size:10.5px; padding:8px 10px; width:auto; white-space:nowrap; }
  .nav-sep{ display:none; }
  .sidebar-foot{ display:none; }
  .grid-2{ grid-template-columns:1fr; }
  .comp-edit-row{ grid-template-columns:1fr 1fr; }
}