:root{
  --bg:#0b0e14; --panel:#121826; --panel2:#171f31; --line:#232d45;
  --txt:#e8edf7; --muted:#8b96ad; --accent:#4f8cff; --accent2:#7c5cff;
  --green:#2fd48c; --red:#ff6b6b; --amber:#ffb648;
  --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--txt);font-family:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;font-size:14px}
.app{display:flex;min-height:100vh}
.muted{color:var(--muted);font-size:12px}

/* Sidebar */
.sidebar{width:264px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);padding:20px 16px;display:flex;flex-direction:column;gap:14px;position:sticky;top:0;height:100vh;overflow-y:auto}
.logo{display:flex;gap:10px;align-items:center}
.logo-name{font-weight:700;font-size:16px}
.logo-sub{font-size:11px;color:var(--muted)}
.side-label{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-top:6px}
.window-pills{display:flex;gap:6px}
.window-pills button{flex:1;background:var(--panel2);border:1px solid var(--line);color:var(--muted);border-radius:8px;padding:6px 0;cursor:pointer;font-size:12px}
.window-pills button.active{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border-color:transparent}
.cat-tree{display:flex;flex-direction:column;gap:2px}
.cat-node{margin-left:var(--indent,0)}
.cat-btn{width:100%;text-align:left;background:none;border:none;color:var(--txt);padding:7px 10px;border-radius:8px;cursor:pointer;display:flex;justify-content:space-between;gap:8px;align-items:center;font-size:13px}
.cat-btn:hover{background:var(--panel2)}
.cat-btn.active{background:linear-gradient(135deg,rgba(79,140,255,.22),rgba(124,92,255,.22));color:#fff}
.cat-btn .twisty{color:var(--muted);font-size:10px;width:14px;flex-shrink:0}
.cat-count{font-size:11px;color:var(--muted);background:var(--panel2);border-radius:20px;padding:2px 8px;white-space:nowrap}
.cat-children{display:none;flex-direction:column}
.cat-children.open{display:flex}
.side-foot{margin-top:auto;font-size:11px;color:var(--muted);display:flex;align-items:center;gap:7px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green)}

/* Main */
.main{flex:1;padding:22px 28px 40px;min-width:0}
.topbar{display:flex;gap:12px;align-items:center}
.search-wrap{flex:1;display:flex;align-items:center;gap:10px;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:6px 8px 6px 14px;color:var(--muted)}
.search-wrap input{flex:1;background:none;border:none;outline:none;color:var(--txt);font-size:14px}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none;border-radius:9px;padding:9px 20px;font-weight:600;cursor:pointer;font-size:13px}
.btn-primary:hover{filter:brightness(1.1)}
.btn-ghost{background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:9px;padding:8px 14px;cursor:pointer;font-size:13px;display:inline-flex;align-items:center;gap:6px}
.btn-ghost:hover{background:var(--panel2)}

.context-bar{display:flex;justify-content:space-between;align-items:flex-end;margin:22px 0 16px;gap:12px;flex-wrap:wrap}
.context-bar h1{font-size:22px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{background:rgba(79,140,255,.15);border:1px solid rgba(79,140,255,.4);color:#bcd3ff;font-size:12px;border-radius:20px;padding:4px 12px}

/* KPIs */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:14px}
.kpi{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.kpi .k-label{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.kpi .k-value{font-size:21px;font-weight:700;margin-top:5px}
.kpi .k-sub{font-size:11px;color:var(--muted);margin-top:3px}

/* Cards & charts */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin-bottom:14px}
.card-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:12px;gap:10px}
.card-head h3{font-size:14px}
.charts{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:14px}
@media(max-width:1200px){.charts{grid-template-columns:1fr}}
.chart{min-height:190px}
.donut-wrap{display:flex;align-items:center;gap:14px}
.legend{display:flex;flex-direction:column;gap:5px;font-size:12px}
.legend .li{display:flex;align-items:center;gap:7px;color:var(--muted)}
.legend .sw{width:10px;height:10px;border-radius:3px}

/* Filters */
.filters{display:flex;gap:14px;align-items:flex-end;flex-wrap:wrap}
.filter{display:flex;flex-direction:column;gap:5px}
.filter label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.filter select,.filter input{background:var(--panel2);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:7px 10px;font-size:13px;outline:none;width:130px}
.filter select:focus,.filter input:focus{border-color:var(--accent)}

/* Table */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
thead th{text-align:left;color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.05em;padding:9px 10px;border-bottom:1px solid var(--line);cursor:pointer;user-select:none;white-space:nowrap}
thead th .arrow{color:var(--accent)}
tbody td{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
tbody tr:hover{background:var(--panel2)}
.title-cell{max-width:420px}
.mpn-tag{font-family:ui-monospace,Consolas,monospace;font-size:11px;background:var(--panel2);border:1px solid var(--line);border-radius:6px;padding:2px 7px;color:#a9c6ff}
.price{font-weight:700;color:var(--green);white-space:nowrap}
.cond-pill{font-size:11px;border-radius:20px;padding:3px 10px;white-space:nowrap}
.c-New{background:rgba(47,212,140,.14);color:var(--green)}
.c-Used{background:rgba(255,107,107,.14);color:var(--red)}
.c-Pre-Owned,.c-Open\ Box{background:rgba(255,182,72,.14);color:var(--amber)}
.seller-cell{font-size:12px}
.seller-cell .rating{color:var(--muted);font-size:11px}
.pager{display:flex;justify-content:center;align-items:center;gap:16px;padding-top:14px}
.seller-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.seller-item{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:10px 14px}
.seller-item .s-name{font-weight:600;font-size:13px}
.seller-item .s-stats{font-size:12px;color:var(--muted);margin-top:3px}