:root{--bg:#f6f8fb;--panel:#fff;--panel-strong:#f9fbfc;--text:#172026;--muted:#63717b;--line:#d9e1e8;--primary:#0f766e;--primary-strong:#0b5f59;--accent:#b45309;--danger:#b42318;--warning:#b7791f;--success:#15803d;--nav:#111827;--nav-muted:#9ca3af;--nav-active:#1f2937}[data-theme=dark]{--bg:#101417;--panel:#171d21;--panel-strong:#1f272d;--text:#edf2f5;--muted:#9aa9b2;--line:#2a353c;--primary:#2dd4bf;--primary-strong:#5eead4;--accent:#f59e0b;--danger:#f87171;--warning:#fbbf24;--success:#4ade80;--nav:#0b0f12;--nav-muted:#94a3b8;--nav-active:#182027}*{box-sizing:border-box}html,body{background:var(--bg);min-height:100%;color:var(--text);letter-spacing:0;margin:0;font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.app-shell{grid-template-columns:272px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{background:var(--nav);color:#fff;flex-direction:column;gap:20px;padding:18px 14px;display:flex}.brand{border-bottom:1px solid #ffffff1f;align-items:center;gap:10px;padding:8px 10px 14px;display:flex}.brand-mark{background:#0f766e;border-radius:6px;place-items:center;width:32px;height:32px;font-weight:800;display:grid}.brand-title{font-weight:700}.brand-subtitle{color:var(--nav-muted);margin-top:2px;font-size:12px}.nav-group{gap:4px;display:grid}.nav-heading{color:var(--nav-muted);text-transform:uppercase;padding:12px 10px 6px;font-size:11px;font-weight:700}.nav-link{color:#d7dde3;border-radius:6px;align-items:center;gap:10px;min-height:38px;padding:8px 10px;font-size:14px;display:flex}.nav-link.active,.nav-link:hover{background:var(--nav-active);color:#fff}.main{flex-direction:column;min-width:0;display:flex}.topbar{background:var(--panel);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;height:64px;padding:0 24px;display:flex}.topbar-actions{align-items:center;gap:10px;display:flex}.icon-button{border:1px solid var(--line);width:36px;height:36px;color:var(--text);background:var(--panel);cursor:pointer;border-radius:6px;place-items:center;display:grid}.page{gap:18px;padding:24px;display:grid}.page-header{justify-content:space-between;align-items:flex-end;gap:16px;display:flex}.page-title{margin:0;font-size:24px}.page-subtitle{color:var(--muted);margin-top:6px}.grid{gap:14px;display:grid}.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px}.metric{gap:8px;display:grid}.metric-label{color:var(--muted);font-size:13px}.metric-value{font-size:28px;font-weight:750}.table-wrap{border:1px solid var(--line);background:var(--panel);border-radius:8px;overflow:auto}table{border-collapse:collapse;width:100%}th,td{border-bottom:1px solid var(--line);text-align:left;vertical-align:middle;padding:12px 14px;font-size:14px}th{color:var(--muted);background:var(--panel-strong);text-transform:uppercase;font-size:12px}.badge{background:var(--panel-strong);min-height:24px;color:var(--muted);border:1px solid var(--line);border-radius:999px;align-items:center;padding:3px 9px;font-size:12px;font-weight:700;display:inline-flex}.badge.online,.badge.resolved{color:var(--success)}.badge.degraded,.badge.acknowledged{color:var(--warning)}.badge.offline,.badge.open,.badge.critical{color:var(--danger)}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;display:grid}.field{gap:6px;display:grid}.field label{color:var(--muted);font-size:13px;font-weight:700}.field input,.field select{border:1px solid var(--line);background:var(--panel);min-height:38px;color:var(--text);border-radius:6px;padding:8px 10px}.button{background:var(--primary);color:#fff;cursor:pointer;border:0;border-radius:6px;min-height:38px;padding:8px 14px;font-weight:700}.button.secondary{background:var(--panel);color:var(--text);border:1px solid var(--line)}.placeholder-list{gap:10px;display:grid}.placeholder-row{border-bottom:1px solid var(--line);justify-content:space-between;gap:12px;padding:12px 0;display:flex}@media (max-width:980px){.app-shell{grid-template-columns:1fr}.sidebar{position:static}.grid.cols-4,.grid.cols-3,.form-grid{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:flex-start}}