:root{--bg:#f5f7fb;--panel:#fff;--text:#14213d;--muted:#6b7280;--line:#e5e7eb;--primary:#0f5ea8;--normal:#168a4b;--warning:#b7791f;--critical:#c53030;--offline:#6b7280;}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.topbar{height:64px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 28px;gap:16px}.topbar .muted{margin-left:12px;color:#dcecff}.container{max-width:1300px;margin:0 auto;padding:26px}.hero{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.hero h1{margin:0 0 5px}.hero p{margin:0;color:var(--muted)}.grid{display:grid;gap:18px;margin-bottom:18px}.grid.three{grid-template-columns:repeat(3,1fr)}.grid.two{grid-template-columns:2fr 1fr}.panel,.metric-card,.login-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:0 3px 12px rgba(20,33,61,.05)}.metric-card{padding:18px}.metric-top,.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.metric-value{font-size:48px;font-weight:800;margin:16px 0 8px}.bar{height:12px;background:#edf0f4;border-radius:8px;overflow:hidden;margin-bottom:12px}.bar span{display:block;height:100%;background:var(--primary)}.muted{color:var(--muted)}.panel{padding:18px}.badge{display:inline-flex;padding:5px 9px;border-radius:999px;font-size:12px;font-weight:700;text-transform:uppercase}.badge.normal{background:#e6f7ee;color:var(--normal)}.badge.warning{background:#fff4d6;color:var(--warning)}.badge.critical{background:#fde8e8;color:var(--critical)}.badge.offline{background:#edf0f4;color:var(--offline)}.device-status{font-weight:700;padding:10px 13px;border-radius:10px;background:#edf0f4}.device-status.online{background:#e6f7ee;color:var(--normal)}.device-status.offline{background:#fde8e8;color:var(--critical)}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse}th,td{padding:11px 10px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}th{font-size:12px;text-transform:uppercase;color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;background:var(--primary);color:#fff;padding:10px 14px;border-radius:8px;cursor:pointer;font-weight:700}.btn.ghost{background:rgba(255,255,255,.14);margin-left:6px}.btn.small{padding:7px 10px;font-size:12px}.panel h2{margin-top:0}.alert-row,.collection-row{display:flex;justify-content:space-between;gap:10px;align-items:flex-start;padding:11px 0;border-bottom:1px solid var(--line)}.empty{color:var(--muted);padding:18px 0}.alert{padding:10px 12px;border-radius:8px;margin:10px 0}.alert.error{background:#fde8e8;color:var(--critical)}.alert.success{background:#e6f7ee;color:var(--normal)}label{display:block;font-weight:700;margin:12px 0}input,select,textarea{width:100%;padding:10px 11px;border:1px solid #cfd5df;border-radius:8px;font:inherit;margin-top:6px;background:#fff}textarea{min-height:90px;resize:vertical}.login-page{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:min(430px,100%);padding:28px}.login-card h1{margin-top:0}.login-card button{width:100%;margin-top:10px}.login-card small{display:block;color:var(--muted);margin-top:14px;line-height:1.5}@media(max-width:900px){.grid.three,.grid.two{grid-template-columns:1fr}.hero{align-items:flex-start;flex-direction:column;gap:12px}.topbar{height:auto;padding:16px;align-items:flex-start;flex-direction:column}.topbar>div:last-child{display:flex;flex-wrap:wrap}.container{padding:16px}}