:root{--bg:#f4f6f8;--card:#fff;--border:#e2e8f0;--text:#1e293b;--sub-text:#64748b;--primary:#0091ff;--success:#22c55e;--danger:#ef4444;--sidebar:#19232f;font-family:Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}.app-shell{min-height:100vh;display:flex}.sidebar{background:var(--sidebar);flex-direction:column;gap:6px;width:240px;padding:16px 12px;display:flex}.sidebar-brand{color:#fff;text-align:center;padding:12px 0 20px;font-size:15px;font-weight:700}.sidebar button{color:#cbd5e1;text-align:left;cursor:pointer;background:0 0;border:none;border-radius:8px;padding:10px 14px;font-size:14px}.sidebar button:hover{background:#ffffff14}.sidebar button.active{background:var(--primary);color:#fff}.sidebar .spacer{flex:1}.sidebar .logout{color:var(--danger)}.main-area{flex-direction:column;flex:1;display:flex}.header-bar{border-bottom:1px solid var(--border);background:#fff;justify-content:space-between;align-items:center;padding:12px 24px;display:flex}.header-bar .title{font-weight:700}.badge-btn{cursor:pointer;color:#334155;background:#f1f5f9;border:1px solid #cbd5e1;border-radius:6px;padding:6px 12px;font-size:13px;font-weight:600;position:relative}.badge-count{background:var(--danger);color:#fff;border-radius:8px;padding:1px 5px;font-size:9px;font-weight:700;position:absolute;top:-6px;right:-6px}.workspace{flex:1;padding:24px}.section-header{margin-bottom:16px;font-size:20px;font-weight:700}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;margin-bottom:16px;padding:16px}table{border-collapse:collapse;background:var(--card);border-radius:10px;width:100%;overflow:hidden}th,td{text-align:left;border-bottom:1px solid var(--border);padding:10px 12px;font-size:13px}th{color:var(--sub-text);text-transform:uppercase;background:#f8fafc;font-size:11px;font-weight:700}tr.low-stock td{color:#b91c1c;background:#fef2f2}input,select,textarea{border:1px solid #cbd5e1;border-radius:6px;width:100%;padding:8px 10px;font-size:14px}button.btn{cursor:pointer;border:none;border-radius:6px;padding:9px 16px;font-size:13px;font-weight:600}button.btn-primary{background:var(--primary);color:#fff}button.btn-success{background:var(--success);color:#fff}button.btn-danger{background:var(--danger);color:#fff}button.btn-outline{background:#fff;border:1px solid #cbd5e1}button:disabled{opacity:.6;cursor:not-allowed}.form-grid{grid-template-columns:repeat(4,1fr);align-items:end;gap:12px;display:grid}.form-field label{color:var(--sub-text);margin-bottom:4px;font-size:12px;display:block}.kpi-row{flex-wrap:wrap;gap:16px;margin-bottom:20px;display:flex}.kpi-card{background:var(--card);border-left:4px solid var(--primary);border-radius:10px;flex:1;min-width:200px;padding:16px}.kpi-card .kpi-title{color:var(--sub-text);font-size:12px}.kpi-card .kpi-value{margin-top:6px;font-size:18px;font-weight:700}.charts-row{flex-wrap:wrap;gap:20px;display:flex}.chart-box{background:var(--card);border-radius:10px;flex:1;min-width:380px;padding:16px}.login-page{background:var(--sidebar);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{background:#fff;border-radius:12px;width:420px;padding:32px}.login-tabs{border:1px solid var(--border);border-radius:8px;margin-bottom:20px;display:flex;overflow:hidden}.login-tabs button{cursor:pointer;background:#f1f5f9;border:none;flex:1;padding:10px;font-weight:600}.login-tabs button.active{background:var(--primary);color:#fff}.field-group{margin-bottom:14px}.field-group label{color:var(--sub-text);margin-bottom:6px;font-size:13px;display:block}.error-text{color:var(--danger);margin-bottom:12px;font-size:13px}.modal-overlay{z-index:50;background:#0f172a80;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-box{background:#fff;border-radius:12px;width:640px;max-height:85vh;padding:28px;overflow:auto}.modal-actions{justify-content:flex-end;gap:10px;margin-top:20px;display:flex}.popover-box{flex-direction:column;gap:12px;display:flex}.chat-layout{height:480px;display:flex}.chat-contacts{border-right:1px solid var(--border);width:220px;overflow-y:auto}.chat-contact-item{cursor:pointer;align-items:center;gap:8px;padding:10px 12px;font-size:13px;display:flex}.chat-contact-item.selected{background:#f1f5f9}.online-dot{background:var(--success);border-radius:50%;width:8px;height:8px;display:inline-block}.offline-dot{background:#cbd5e1;border-radius:50%;width:8px;height:8px;display:inline-block}.chat-messages{flex-direction:column;flex:1;gap:8px;padding:12px;display:flex;overflow-y:auto}.chat-bubble{border-radius:14px;max-width:70%;padding:8px 12px;font-size:13px}.chat-bubble.mine{background:var(--primary);color:#fff;align-self:flex-end}.chat-bubble.theirs{background:#f1f5f9;align-self:flex-start}.chat-input-row{border-top:1px solid var(--border);gap:8px;padding:10px;display:flex}.notif-item{border-bottom:1px solid var(--border);padding:10px;font-size:13px}.footer-status{color:var(--sub-text);border-top:1px solid var(--border);background:#fff;padding:8px 24px;font-size:12px}.status-online{color:var(--success);font-weight:700}.status-offline{color:var(--danger);font-weight:700}