:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --danger:#dc2626;
  --success:#16a34a;
  --bg:#f2f4f7;
  --border:#e2e5eb;
  --text:#1f2937;
  --muted:#6b7280;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}

/* ---------- Login ---------- */
.login-body{display:flex;align-items:center;justify-content:center;height:100vh}
.login-box{background:#fff;padding:34px;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.08);width:320px;text-align:center}
.login-box h2{margin:0 0 4px}
.login-box .sub{color:var(--muted);margin-bottom:20px;font-size:14px}
.login-box form{text-align:left}
.login-logo{max-height:60px;max-width:220px;margin-bottom:10px}

/* ---------- Layout ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;background:#93ca42;border-bottom:none;box-shadow:0 1px 4px rgba(0,0,0,.12);padding:10px 16px;position:sticky;top:0;z-index:50}
.topbar-left{display:flex;align-items:center;gap:10px}
.brand{font-weight:bold;font-size:18px;color:#fff;display:flex;align-items:center;gap:8px}
.brand-logo{height:32px;max-width:150px;object-fit:contain}
.nav-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:#fff}
.topbar-right{display:flex;align-items:center;gap:10px}
.user-chip{font-size:13px;color:rgba(255,255,255,.9)}

.layout{display:flex;min-height:calc(100vh - 53px)}
.sidenav{width:210px;background:#00aeee;border-right:none;padding:14px 0;flex-shrink:0;position:sticky;top:53px;align-self:flex-start;height:calc(100vh - 53px);overflow-y:auto}
.sidenav a{display:block;padding:12px 20px;color:#fff;text-decoration:none;font-size:14px}
.sidenav a:hover{background:rgba(255,255,255,.15)}
.sidenav a.active{background:rgba(255,255,255,.22);color:#fff;font-weight:bold;border-right:3px solid #fff}
.content{flex:1;padding:20px;max-width:100%;overflow-x:auto}

/* ---------- Buttons ---------- */
.btn{display:inline-block;padding:8px 16px;border-radius:6px;border:1px solid transparent;cursor:pointer;font-size:14px;text-decoration:none;background:#eee;color:#222}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-danger{background:var(--danger);color:#fff}
.btn-success{background:var(--success);color:#fff}
.btn-outline{background:#fff;border:1px solid var(--border)}
.btn-sm{padding:5px 10px;font-size:12px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---------- Forms ---------- */
label{display:block;font-size:13px;margin-bottom:4px;color:var(--muted)}
input[type=text],input[type=password],input[type=number],select{
  width:100%;padding:9px 10px;border:1px solid var(--border);border-radius:6px;margin-bottom:14px;font-size:14px;background:#fff
}
.card{background:#fff;border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:20px}
.card h3{margin-top:0}
.form-row{display:flex;gap:14px;flex-wrap:wrap}
.form-row > div{flex:1;min-width:200px}

/* ---------- Dashboard summary cards ---------- */
.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-bottom:20px}
.summary-card{background:#fff;border:1px solid var(--border);border-radius:10px;padding:16px;transition:box-shadow .15s,transform .1s}
.summary-card.warn{border-color:#fde68a;background:#fffbeb}
.summary-card.danger{border-color:#fecaca;background:#fef2f2}
.summary-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.03em;margin-bottom:6px}
.summary-value{font-size:26px;font-weight:bold}
.summary-card.warn .summary-value{color:#b45309}
.summary-card.danger .summary-value{color:#b91c1c}
.summary-card.clickable{cursor:pointer}
.summary-card.clickable:hover{box-shadow:0 3px 10px rgba(0,0,0,.1);transform:translateY(-1px)}
.summary-card.active{outline:3px solid var(--primary);box-shadow:0 3px 12px rgba(37,99,235,.25)}

/* ---------- Stock status badges & row highlight ---------- */
.badge-ok{background:#dcfce7;color:#166534}
.badge-warn{background:#fee2e2;color:#991b1b}
.badge-danger{background:#fff;color:#7f1d1d}
tr.row-low{background:#fecaca;border-left:5px solid #dc2626}
tr.row-low td{color:#7f1d1d;font-weight:600}
tr.row-low:hover{background:#fca5a5}
tr.row-out{background:#dc2626;border-left:5px solid #7f1d1d}
tr.row-out td{color:#000000;font-weight:700}
tr.row-out:hover{background:#b91c1c}
tr.row-out .badge{background:#fff;color:#7f1d1d}
tr.row-low td[contenteditable=true]:focus,
tr.row-out td[contenteditable=true]:focus{color:#1f2937;background:#fff}
.nav-badge{display:inline-block;min-width:18px;padding:1px 6px;border-radius:20px;font-size:11px;background:#dc2626;color:#fff;text-align:center;margin-left:6px}

/* ---------- Sortable table headers ---------- */
th.sortable{cursor:pointer;user-select:none}
th.sortable:hover{color:var(--text)}
.sort-arrow{font-size:10px}


/* ---------- Table ---------- */
table{width:100%;border-collapse:collapse;background:#fff;font-size:14px}
th,td{padding:9px 10px;border-bottom:1px solid var(--border);text-align:left}
th{background:#f8f9fb;font-size:12px;text-transform:uppercase;color:var(--muted)}
tr:hover{background:#fafbfc}
td[contenteditable=true]{background:#fffbe6;cursor:text}
td[contenteditable=true]:focus{outline:2px solid var(--primary);background:#fff}
.table-wrap{overflow-x:auto}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px;justify-content:space-between}
.toolbar-left{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.search-input{padding:8px 10px;border:1px solid var(--border);border-radius:6px;min-width:220px}

/* ---------- Alerts / toast ---------- */
.alert{padding:10px 14px;border-radius:6px;margin-bottom:14px;font-size:14px}
.alert-error{background:#fee2e2;color:#991b1b}
.alert-success{background:#dcfce7;color:#166534}
#toast{position:fixed;bottom:20px;right:20px;z-index:999;display:flex;flex-direction:column;gap:8px}
.toast-item{background:#1f2937;color:#fff;padding:12px 18px;border-radius:8px;box-shadow:0 4px 14px rgba(0,0,0,.2);min-width:220px;animation:fadein .2s ease}
.toast-item.success{background:#16a34a}
.toast-item.error{background:#dc2626}
@keyframes fadein{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* ---------- Modal ---------- */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:none;align-items:center;justify-content:center;z-index:100;padding:16px}
.modal-overlay.open{display:flex}
.modal-box{background:#fff;border-radius:10px;padding:22px;width:100%;max-width:420px;max-height:90vh;overflow-y:auto}
.modal-box h3{margin-top:0}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:10px}
.item-preview{background:#f8f9fb;border-radius:8px;padding:12px;margin-bottom:14px;font-size:14px}
.item-preview div{margin-bottom:4px}

/* ---------- Scanner ---------- */
.scan-box{background:#fff;border:1px solid var(--border);border-radius:10px;padding:20px;max-width:480px}
#cameraPreview{width:100%;border-radius:8px;overflow:hidden;background:#000;margin-bottom:14px;display:none}
.scan-input-row{display:flex;gap:8px}
.scan-input-row input{flex:1;margin-bottom:0}
.badge{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;background:#eaf0fe;color:var(--primary)}

/* ---------- Responsive ---------- */
@media(max-width:820px){
  .nav-toggle{display:block}
  .sidenav{position:fixed;left:-220px;top:53px;bottom:0;transition:left .2s;z-index:60;box-shadow:2px 0 10px rgba(0,0,0,.1)}
  .sidenav.open{left:0}
  .content{padding:14px}
  .user-chip{display:none}
}