:root{
  --bg:#0d1117;
  --panel:#151b23;
  --panel-2:#1a2129;
  --border:#26303c;
  --text:#e6edf3;
  --text-dim:#8b949e;
  --accent:#dc2626;
  --accent-dim:#991b1b;
  --green:#22c55e;
  --green-dim:#14532d;
  --red:#ef4444;
  --gray-box:#2a3441;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:14px;
  line-height:1.5;
}
a{color:inherit;text-decoration:none;}
.mono{font-family:var(--font-mono);}

/* ---------- App shell ---------- */
.app{
  display:flex;
  min-height:100vh;
}
main{
  flex:1;
  padding:32px 40px;
  max-width:1200px;
}

/* ---------- Sidebar ---------- */
.sidebar{
  width:230px;
  flex-shrink:0;
  background:var(--panel);
  border-right:1px solid var(--border);
  padding:24px 18px;
  display:flex;
  flex-direction:column;
  gap:24px;
  position:sticky;
  top:0;
  height:100vh;
}
.brand{
  font-weight:700;
  font-size:18px;
  display:flex;
  align-items:center;
  gap:8px;
}
.brand-mark{color:var(--accent);}
.sidebar nav{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.sidebar nav a{
  padding:10px 12px;
  border-radius:8px;
  color:var(--text-dim);
  font-weight:500;
}
.sidebar nav a:hover{background:var(--panel-2);color:var(--text);}
.sidebar nav a.active{background:var(--accent-dim);color:#fff;}
.sidebar .logout{
  margin-top:auto;
  color:var(--text-dim);
  font-size:13px;
  padding:10px 12px;
}
.sidebar .logout:hover{color:var(--red);}
.nav-divider{
  margin:14px 0 4px 12px;
  font-size:10.5px;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--text-dim);
  font-weight:700;
}

/* quick search */
.quick-search{position:relative;}
.quick-search input{
  width:100%;
  background:var(--panel-2);
  border:1px solid var(--border);
  color:var(--text);
  padding:9px 10px;
  border-radius:8px;
  font-size:13px;
}
.quick-search input:focus{outline:none;border-color:var(--accent);}
.quick-search-results{
  position:absolute;
  top:calc(100% + 4px);
  left:0;
  right:0;
  background:var(--panel-2);
  border:1px solid var(--border);
  border-radius:8px;
  overflow:hidden;
  z-index:50;
  display:none;
  box-shadow:0 8px 24px rgba(0,0,0,.4);
}
.quick-search-results.show{display:block;}
.quick-search-results a{
  display:flex;
  justify-content:space-between;
  gap:8px;
  padding:9px 10px;
  font-size:12.5px;
  border-bottom:1px solid var(--border);
}
.quick-search-results a:last-child{border-bottom:none;}
.quick-search-results a:hover{background:var(--panel);}
.quick-search-results .qs-empty{
  padding:10px;
  color:var(--text-dim);
  font-size:12.5px;
}

/* ---------- Page head ---------- */
.page-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  margin-bottom:24px;
  gap:16px;
  flex-wrap:wrap;
}
.eyebrow{
  text-transform:uppercase;
  letter-spacing:.08em;
  font-size:11px;
  color:var(--accent);
  font-weight:700;
  margin-bottom:4px;
}
.page-head h2{margin:0 0 4px 0;font-size:24px;}
.sub{color:var(--text-dim);font-size:13px;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--accent);
  color:#fff;
  border:none;
  padding:10px 16px;
  border-radius:8px;
  font-size:13.5px;
  font-weight:600;
  cursor:pointer;
}
.btn:hover{background:var(--accent-dim);}
.btn.ghost{
  background:transparent;
  border:1px solid var(--border);
  color:var(--text);
}
.btn.ghost:hover{border-color:var(--accent);}
.btn.danger{background:var(--red);}
.btn.danger:hover{background:#b91c1c;}
.btn.small{padding:6px 10px;font-size:12px;}
.btn:disabled{opacity:.4;cursor:not-allowed;}

/* ---------- Cards ---------- */
.card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:12px;
  padding:22px;
  margin-bottom:22px;
}

/* ---------- Alerts ---------- */
.alert{
  background:#3b1d1d;
  border:1px solid #7f1d1d;
  color:#fca5a5;
  padding:10px 14px;
  border-radius:8px;
  margin-bottom:16px;
  font-size:13.5px;
}
.alert.success{
  background:var(--green-dim);
  border-color:#166534;
  color:#86efac;
}

/* ---------- Forms ---------- */
label{
  display:block;
  font-size:12.5px;
  color:var(--text-dim);
  margin:14px 0 6px;
  font-weight:600;
}
label:first-child{margin-top:0;}
input[type=text],input[type=number],input[type=date],input[type=password],textarea,select{
  width:100%;
  background:var(--panel-2);
  border:1px solid var(--border);
  color:var(--text);
  padding:10px 12px;
  border-radius:8px;
  font-size:14px;
  font-family:inherit;
}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);}
textarea{min-height:80px;resize:vertical;}
.field-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.readonly-loc{
  background:var(--panel-2);
  border:1px dashed var(--border);
  padding:10px 12px;
  border-radius:8px;
  font-size:16px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:.03em;
}
form .btn{margin-top:18px;}

/* ---------- Dashboard stats ---------- */
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin-bottom:22px;
}
.grid-2{
  display:grid;
  grid-template-columns:1.3fr 1fr;
  gap:22px;
  align-items:start;
}
.stat-card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:12px;
  padding:20px;
}
.stat-card .label{color:var(--text-dim);font-size:12.5px;margin-bottom:8px;font-weight:600;}
.stat-card .value{font-size:30px;font-weight:800;}
.stat-card.free .value{color:var(--green);}
.stat-card.cap .value{color:var(--accent);}

/* ---------- Table ---------- */
table{width:100%;border-collapse:collapse;}
th,td{
  text-align:left;
  padding:11px 10px;
  border-bottom:1px solid var(--border);
  font-size:13.5px;
}
th{
  color:var(--text-dim);
  font-size:11.5px;
  text-transform:uppercase;
  letter-spacing:.05em;
  font-weight:700;
}
tbody tr:hover{background:var(--panel-2);}
.empty-row td{color:var(--text-dim);text-align:center;padding:28px 0;}
.check-col{width:34px;}
.check-col input[type=checkbox]{width:auto;margin:0;}
.bulk-bar{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:14px;
}
.bulk-bar #bulkCount{color:var(--text-dim);font-size:12.5px;}
.loc-badge{
  background:var(--panel-2);
  border:1px solid var(--border);
  padding:3px 8px;
  border-radius:6px;
  font-size:12px;
  font-weight:700;
  color:var(--accent);
}
.role-badge{
  background:var(--panel-2);
  border:1px solid var(--border);
  padding:3px 9px;
  border-radius:20px;
  font-size:11.5px;
  font-weight:600;
  color:var(--text-dim);
}
.role-badge.admin{
  background:var(--accent-dim);
  border-color:var(--accent);
  color:#fff;
}
.you-tag{color:var(--text-dim);font-size:11.5px;font-weight:500;}
.action-badge{
  background:var(--panel-2);
  border:1px solid var(--border);
  padding:3px 9px;
  border-radius:6px;
  font-size:11.5px;
  font-weight:600;
  color:var(--text-dim);
  white-space:nowrap;
}
.action-login,.action-logout{color:var(--text-dim);}
.action-add_item{color:var(--green);border-color:#166534;}
.action-edit_item{color:var(--accent);border-color:var(--accent-dim);}
.action-delete_item,.action-delete_user,.action-bulk_delete_items{color:var(--red);border-color:#7f1d1d;}
.action-create_user{color:#c084fc;border-color:#6b21a8;}
.checkbox-label{
  display:flex;
  align-items:center;
  gap:8px;
  margin:16px 0 4px;
  font-size:13px;
  color:var(--text);
  font-weight:500;
  cursor:pointer;
}
.checkbox-label input{width:auto;}

/* ---------- Filter bar ---------- */
.filter-bar{
  display:flex;
  gap:14px;
  align-items:flex-end;
  flex-wrap:wrap;
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:12px;
  padding:18px 20px;
  margin-bottom:22px;
}
.filter-bar > div{min-width:150px;}
.filter-bar label{margin:0 0 6px;}

/* ---------- Warehouse map ---------- */
.map-legend{
  display:flex;
  gap:20px;
  margin-bottom:20px;
  font-size:13px;
  color:var(--text-dim);
}
.map-legend span{display:flex;align-items:center;gap:6px;}
.legend-swatch{width:12px;height:12px;border-radius:3px;display:inline-block;}
.isle-block{margin-bottom:24px;}
.isle-block h3{margin:0 0 10px;}
.isle-letter{
  background:var(--panel-2);
  border:1px solid var(--border);
  padding:4px 10px;
  border-radius:6px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--text-dim);
}
.box-grid{
  display:grid;
  grid-template-columns:repeat(10,1fr);
  gap:8px;
}
.box-cell{
  aspect-ratio:1;
  background:var(--gray-box);
  border-radius:6px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  font-weight:700;
  color:var(--text-dim);
  cursor:default;
  position:relative;
}
.box-cell.occupied{background:var(--green-dim);color:var(--green);}
.box-cell[data-tip]:hover::after{
  content:attr(data-tip);
  position:absolute;
  bottom:calc(100% + 6px);
  left:50%;
  transform:translateX(-50%);
  background:#000;
  color:#fff;
  padding:5px 9px;
  border-radius:6px;
  font-size:11px;
  font-weight:500;
  white-space:nowrap;
  z-index:10;
  box-shadow:0 4px 12px rgba(0,0,0,.4);
}

/* ---------- Login screen ---------- */
.login-shell{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  background:radial-gradient(circle at top,#2a1414,var(--bg));
}
.login-card{
  width:340px;
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:14px;
  padding:32px;
}
.login-card .tag{
  display:inline-block;
  background:var(--accent-dim);
  color:#fff;
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.08em;
  padding:3px 8px;
  border-radius:5px;
  margin-bottom:12px;
}
.login-card h1{margin:0 0 4px;font-size:26px;}

/* ---------- Responsive ---------- */
@media (max-width: 820px){
  .app{flex-direction:column;}
  .sidebar{
    width:100%;
    height:auto;
    position:relative;
    flex-direction:row;
    align-items:center;
    overflow-x:auto;
    gap:16px;
  }
  .sidebar nav{flex-direction:row;}
  .quick-search{display:none;}
  main{padding:20px;}
  .grid-3{grid-template-columns:1fr;}
  .grid-2{grid-template-columns:1fr;}
  .field-row{grid-template-columns:1fr;}
  .box-grid{grid-template-columns:repeat(5,1fr);}
}