*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f172a;--surface: #1e293b;--surface2: #273549;--border: #334155;--text: #e2e8f0;--muted: #94a3b8;--blue: #3b82f6;--green: #22c55e;--yellow: #f59e0b;--red: #ef4444;--radius: 10px}body{background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,sans-serif;font-size:14px;line-height:1.5}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.layout{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;position:fixed;top:0;left:0;height:100vh;z-index:100}.sidebar-logo{padding:20px 16px 16px;font-size:16px;font-weight:700;color:var(--blue);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}.sidebar-nav{padding:12px 8px;flex:1}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:var(--muted);cursor:pointer;transition:all .15s;margin-bottom:2px;font-size:13.5px}.nav-item:hover{background:var(--surface2);color:var(--text)}.nav-item.active{background:#3b82f626;color:var(--blue);font-weight:600}.nav-item .icon{width:18px;text-align:center;font-size:15px}.main-content{margin-left:220px;flex:1;min-height:100vh}.page{padding:24px 28px;max-width:1400px}.page-header{margin-bottom:24px}.page-title{font-size:20px;font-weight:700}.page-sub{color:var(--muted);margin-top:3px;font-size:13px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.card-title{font-weight:600;margin-bottom:16px;font-size:14px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px;margin-bottom:24px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px}.stat-label{font-size:12px;color:var(--muted);margin-bottom:6px}.stat-value{font-size:28px;font-weight:700;line-height:1}.stat-value.green{color:var(--green)}.stat-value.yellow{color:var(--yellow)}.stat-value.red{color:var(--red)}.stat-value.blue{color:var(--blue)}.server-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}.server-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;cursor:pointer;transition:border-color .15s,transform .1s}.server-card:hover{border-color:var(--blue);transform:translateY(-1px)}.server-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.server-name{font-weight:600;font-size:15px}.server-host{font-size:11px;color:var(--muted);margin-top:2px}.status-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}.status-dot.online{background:var(--green);box-shadow:0 0 6px var(--green)}.status-dot.offline{background:var(--border)}.status-dot.warning{background:var(--yellow);box-shadow:0 0 6px var(--yellow)}.metric-row{display:flex;justify-content:space-between;margin-bottom:8px;font-size:12.5px}.metric-label{color:var(--muted)}.metric-val{font-weight:600}.progress-bar-wrap{background:var(--surface2);border-radius:4px;height:5px;margin-top:3px}.progress-bar{height:5px;border-radius:4px;transition:width .3s}.progress-bar.ok{background:var(--blue)}.progress-bar.warning{background:var(--yellow)}.progress-bar.critical{background:var(--red)}.badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600;text-transform:uppercase}.badge.critical{background:#ef444426;color:var(--red);border:1px solid rgba(239,68,68,.3)}.badge.warning{background:#f59e0b26;color:var(--yellow);border:1px solid rgba(245,158,11,.3)}.badge.ok{background:#22c55e26;color:var(--green);border:1px solid rgba(34,197,94,.3)}.badge.blue{background:#3b82f626;color:var(--blue);border:1px solid rgba(59,130,246,.3)}.badge.gray{background:#64748b26;color:var(--muted);border:1px solid rgba(100,116,139,.3)}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th{text-align:left;padding:9px 12px;background:var(--surface2);border-bottom:1px solid var(--border);color:var(--muted);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}td{padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:middle}tr:last-child td{border-bottom:none}tr:hover td{background:#ffffff05}.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:7px;border:none;cursor:pointer;font-size:13px;font-weight:500;transition:opacity .15s;text-decoration:none}.btn:hover{opacity:.85}.btn-primary{background:var(--blue);color:#fff}.btn-danger{background:#ef444433;color:var(--red);border:1px solid rgba(239,68,68,.3)}.btn-ghost{background:var(--surface2);color:var(--text);border:1px solid var(--border)}.btn-sm{padding:4px 10px;font-size:12px}.btn:disabled{opacity:.4;cursor:not-allowed}.form-group{margin-bottom:16px}.form-label{display:block;margin-bottom:6px;font-size:13px;color:var(--muted)}.form-input{width:100%;padding:8px 12px;background:var(--surface2);border:1px solid var(--border);border-radius:7px;color:var(--text);font-size:13.5px}.form-input:focus{outline:none;border-color:var(--blue)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.period-pills{display:flex;gap:6px;margin-bottom:16px}.period-pill{padding:4px 12px;border-radius:16px;font-size:12px;border:1px solid var(--border);background:var(--surface2);color:var(--muted);cursor:pointer}.period-pill.active{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}.alert-row td:first-child{border-left:3px solid transparent}.alert-row.critical td:first-child{border-left-color:var(--red)}.alert-row.warning td:first-child{border-left-color:var(--yellow)}.alert-row.acked td{opacity:.5}.text-muted{color:var(--muted)}.text-sm{font-size:12px}.mt-4{margin-top:4px}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mb-16{margin-bottom:16px}.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-8{gap:8px}.gap-12{gap:12px}.charts-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:20px}@media (max-width: 900px){.charts-grid{grid-template-columns:1fr}}.empty-state{text-align:center;padding:48px 20px;color:var(--muted)}.empty-state .icon{font-size:40px;margin-bottom:10px}.spinner{display:inline-block;width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--blue);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}