:root{--bg: #0f1419;--panel: #1a212b;--panel-2: #232c38;--border: #2d3947;--text: #e6edf3;--muted: #8b98a9;--accent: #3b82f6;--green: #22c55e;--amber: #f59e0b;--red: #ef4444}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--accent);text-decoration:none}.layout{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--panel);border-right:1px solid var(--border);padding:18px 12px;display:flex;flex-direction:column;gap:4px}.sidebar h1{font-size:15px;margin:4px 8px 18px;letter-spacing:.3px}.nav-link{padding:9px 12px;border-radius:8px;color:var(--muted);font-size:14px;display:flex;justify-content:space-between;align-items:center}.nav-link.active,.nav-link:hover{background:var(--panel-2);color:var(--text)}.badge{background:var(--red);color:#fff;border-radius:999px;font-size:11px;padding:1px 7px}.main{flex:1;padding:24px 28px;overflow:auto}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.topbar .who{color:var(--muted);font-size:13px}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}.stat{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:16px}.stat .label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.5px}.stat .value{font-size:28px;font-weight:600;margin-top:6px}.device-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin-top:8px}.device{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:14px}.device.offline{animation:pulse-offline 2s infinite}@keyframes pulse-offline{0%,to{border-color:var(--red)}50%{border-color:#7f1d1d}}.device .name{font-weight:600;display:flex;justify-content:space-between;align-items:center}.dot{width:9px;height:9px;border-radius:50%;display:inline-block}.dot.online{background:var(--green)}.dot.offline{background:var(--red)}.dot.warning{background:var(--amber)}.device .ip{color:var(--muted);font-size:12px;margin:2px 0 10px}.meter{margin:7px 0}.meter .row{display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}.bar{height:6px;background:var(--panel-2);border-radius:4px;overflow:hidden;margin-top:3px}.bar>span{display:block;height:100%;background:var(--accent)}table{width:100%;border-collapse:collapse;margin-top:10px}th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--border);font-size:13px}th{color:var(--muted);font-weight:500}button{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:8px 14px;font-size:13px;cursor:pointer}button.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}input,select{background:var(--panel-2);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:9px 11px;font-size:14px;width:100%}.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh}.login-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:30px;width:340px}.login-card h2{margin:0 0 18px}.login-card .field{margin-bottom:14px}.login-card label{display:block;font-size:12px;color:var(--muted);margin-bottom:5px}.error{color:var(--red);font-size:13px;margin-top:10px}.muted{color:var(--muted)}tr.clickable{cursor:pointer}tr.clickable:hover td{background:#7f7f7f14}.detail-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;justify-content:flex-end;z-index:50}.detail-panel{position:relative;width:min(720px,92vw);height:100%;overflow-y:auto;background:var(--panel, #1b1b1f);padding:20px 24px;box-shadow:-4px 0 24px #0006}.resize-handle{position:absolute;top:0;height:100%;width:7px;cursor:ew-resize;z-index:60}.resize-handle:hover{background:var(--accent);opacity:.6}.detail-tabs{display:flex;gap:2px;flex-wrap:wrap;border-bottom:1px solid var(--border);position:sticky;top:-20px;background:var(--panel);z-index:3;margin:16px 0 14px;padding-top:2px}.detail-tabs .tab{background:transparent;border:0;border-bottom:2px solid transparent;border-radius:0;color:var(--muted);padding:9px 14px;font-size:14px;cursor:pointer}.detail-tabs .tab:hover{color:var(--text)}.detail-tabs .tab.active{color:var(--text);border-bottom-color:var(--accent)}.metric-chart{margin:12px 0 18px}.metric-chart-head{display:flex;justify-content:space-between;align-items:baseline;font-size:13px;margin-bottom:4px}.chart{display:block;background:var(--panel-2);border:1px solid var(--border);border-radius:8px}.chart-grid{stroke:var(--border);stroke-width:1;vector-effect:non-scaling-stroke}.chart-empty{display:flex;align-items:center;justify-content:center;height:90px;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;font-size:13px}.range-tabs{display:flex;gap:4px}.range-tabs button{padding:5px 11px;font-size:12px}.range-tabs button.active{background:var(--accent);color:#fff;border-color:var(--accent)}.card-drag{cursor:grab}.card-drag.dragging{opacity:.45;cursor:grabbing}.card-drag.drag-over .device{outline:2px dashed var(--accent);outline-offset:2px}